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<head><title>Package Manager Specification</title> 
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> 
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<div class="maketitle">
                                                                            
                                                                            

<h2 class="titleHead">Package Manager Specification</h2>
               <div class="author" ><span 
class="ecrm-1200">Stephen P. Bennett</span>
<br />    <a 
href="mailto:spb@exherbo.org" ><span 
class="ecrm-1200">spb@exherbo.org</span></a> <br class="and" /><span 
class="ecrm-1200">Christian Faulhammer</span>
<br />       <a 
href="mailto:fauli@gentoo.org" ><span 
class="ecrm-1200">fauli@gentoo.org</span></a> <br class="and" /><span 
class="ecrm-1200">Ciaran McCreesh</span>
<br /> <a 
href="mailto:ciaran.mccreesh@googlemail.com" ><span 
class="ecrm-1200">ciaran.mccreesh@googlemail.com</span></a> <br class="and" /><span 
class="ecrm-1200">Ulrich M</span><span 
class="ecrm-1200">&uuml;ller</span>
<br />                <a 
href="mailto:ulm@gentoo.org" ><span 
class="ecrm-1200">ulm@gentoo.org</span></a> </div>
<br />
<div class="date" ><span 
class="ecrm-1200">20th</span><span 
class="ecrm-1200">&#x00A0;September</span><span 
class="ecrm-1200">&#x00A0;2012</span></div>
                                                                            
                                                                            
</div>
                                                                            
                                                                            
<h2 class="likechapterHead"><a 
 id="x1-1000"></a>Contents</h2> <div class="tableofcontents">
<span class="chapterToc" >1 <a 
href="#x1-80001" id="QQ2-1-8">Introduction</a></span>
<br />&#x00A0;<span class="sectionToc" >1.1 <a 
href="#x1-90001.1" id="QQ2-1-9">Aims and Motivation</a></span>
<br />&#x00A0;<span class="sectionToc" >1.2 <a 
href="#x1-100001.2" id="QQ2-1-10">Rationale</a></span>
<br />&#x00A0;<span class="sectionToc" >1.3 <a 
href="#x1-110001.3" id="QQ2-1-11">Conventions</a></span>
<br /><span class="chapterToc" >2 <a 
href="#x1-120002" id="QQ2-1-12">EAPIs</a></span>
<br />&#x00A0;<span class="sectionToc" >2.1 <a 
href="#x1-130002.1" id="QQ2-1-13">Definition</a></span>
<br />&#x00A0;<span class="sectionToc" >2.2 <a 
href="#x1-140002.2" id="QQ2-1-14">Defined EAPIs</a></span>
<br />&#x00A0;<span class="sectionToc" >2.3 <a 
href="#x1-150002.3" id="QQ2-1-15">Reserved EAPIs</a></span>
<br /><span class="chapterToc" >3 <a 
href="#x1-160003" id="QQ2-1-16">Names and Versions</a></span>
<br />&#x00A0;<span class="sectionToc" >3.1 <a 
href="#x1-170003.1" id="QQ2-1-17">Restrictions upon Names</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.1 <a 
href="#x1-180003.1.1" id="QQ2-1-18">Category Names</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.2 <a 
href="#x1-200003.1.2" id="QQ2-1-20">Package Names</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.3 <a 
href="#x1-220003.1.3" id="QQ2-1-22">Slot Names</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.4 <a 
href="#x1-230003.1.4" id="QQ2-1-23">USE Flag Names</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.5 <a 
href="#x1-250003.1.5" id="QQ2-1-25">Repository Names</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.6 <a 
href="#x1-260003.1.6" id="QQ2-1-26">Keyword Names</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >3.1.7 <a 
href="#x1-270003.1.7" id="QQ2-1-27">EAPI Names</a></span>
<br />&#x00A0;<span class="sectionToc" >3.2 <a 
href="#x1-280003.2" id="QQ2-1-28">Version Specifications</a></span>
<br />&#x00A0;<span class="sectionToc" >3.3 <a 
href="#x1-290003.3" id="QQ2-1-29">Version Comparison</a></span>
<br />&#x00A0;<span class="sectionToc" >3.4 <a 
href="#x1-300003.4" id="QQ2-1-37">Uniqueness of versions</a></span>
<br /><span class="chapterToc" >4 <a 
href="#x1-310004" id="QQ2-1-38">Tree Layout</a></span>
<br />&#x00A0;<span class="sectionToc" >4.1 <a 
href="#x1-320004.1" id="QQ2-1-39">Top Level</a></span>
<br />&#x00A0;<span class="sectionToc" >4.2 <a 
href="#x1-330004.2" id="QQ2-1-40">Category Directories</a></span>
<br />&#x00A0;<span class="sectionToc" >4.3 <a 
href="#x1-340004.3" id="QQ2-1-41">Package Directories</a></span>
<br />&#x00A0;<span class="sectionToc" >4.4 <a 
href="#x1-350004.4" id="QQ2-1-42">The Profiles Directory</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >4.4.1 <a 
href="#x1-360004.4.1" id="QQ2-1-43">The profiles.desc file</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >4.4.2 <a 
href="#x1-370004.4.2" id="QQ2-1-44">The thirdpartymirrors file</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >4.4.3 <a 
href="#x1-380004.4.3" id="QQ2-1-45">use.desc and related files</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >4.4.4 <a 
href="#x1-390004.4.4" id="QQ2-1-46">The updates directory</a></span>
<br />&#x00A0;<span class="sectionToc" >4.5 <a 
href="#x1-400004.5" id="QQ2-1-47">The Licenses Directory</a></span>
<br />&#x00A0;<span class="sectionToc" >4.6 <a 
href="#x1-410004.6" id="QQ2-1-48">The Eclass Directory</a></span>
<br />&#x00A0;<span class="sectionToc" >4.7 <a 
href="#x1-420004.7" id="QQ2-1-49">The Metadata Directory</a></span>
                                                                            
                                                                            
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >4.7.1 <a 
href="#x1-430004.7.1" id="QQ2-1-50">The metadata cache</a></span>
<br /><span class="chapterToc" >5 <a 
href="#x1-440005" id="QQ2-1-51">Profiles</a></span>
<br />&#x00A0;<span class="sectionToc" >5.1 <a 
href="#x1-450005.1" id="QQ2-1-52">General principles</a></span>
<br />&#x00A0;<span class="sectionToc" >5.2 <a 
href="#x1-460005.2" id="QQ2-1-53">Files that make up a profile</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.1 <a 
href="#x1-470005.2.1" id="QQ2-1-54">The parent file</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.2 <a 
href="#x1-480005.2.2" id="QQ2-1-55">The eapi file</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.3 <a 
href="#x1-490005.2.3" id="QQ2-1-56">deprecated</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.4 <a 
href="#x1-500005.2.4" id="QQ2-1-57">make.defaults</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.5 <a 
href="#x1-510005.2.5" id="QQ2-1-58">Simple line-based files</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.6 <a 
href="#x1-520005.2.6" id="QQ2-1-59">packages</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.7 <a 
href="#x1-530005.2.7" id="QQ2-1-60">packages.build</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.8 <a 
href="#x1-540005.2.8" id="QQ2-1-61">package.mask</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.9 <a 
href="#x1-560005.2.9" id="QQ2-1-63">package.provided</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.10 <a 
href="#x1-570005.2.10" id="QQ2-1-64">package.use</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.2.11 <a 
href="#x1-580005.2.11" id="QQ2-1-65">USE masking and forcing</a></span>
<br />&#x00A0;<span class="sectionToc" >5.3 <a 
href="#x1-590005.3" id="QQ2-1-68">Profile variables</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.3.1 <a 
href="#x1-600005.3.1" id="QQ2-1-69">Incremental Variables</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >5.3.2 <a 
href="#x1-610005.3.2" id="QQ2-1-71">Specific variables and their meanings</a></span>
<br /><span class="chapterToc" >6 <a 
href="#x1-620006" id="QQ2-1-72">Ebuild File Format</a></span>
<br /><span class="chapterToc" >7 <a 
href="#x1-630007" id="QQ2-1-73">Ebuild-defined Variables</a></span>
<br />&#x00A0;<span class="sectionToc" >7.1 <a 
href="#x1-650007.1" id="QQ2-1-75">Metadata invariance</a></span>
<br />&#x00A0;<span class="sectionToc" >7.2 <a 
href="#x1-660007.2" id="QQ2-1-76">Mandatory Ebuild-defined Variables</a></span>
<br />&#x00A0;<span class="sectionToc" >7.3 <a 
href="#x1-670007.3" id="QQ2-1-77">Optional Ebuild-defined Variables</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >7.3.1 <a 
href="#x1-680007.3.1" id="QQ2-1-80">EAPI</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >7.3.2 <a 
href="#x1-690007.3.2" id="QQ2-1-81">Keywords</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >7.3.3 <a 
href="#x1-700007.3.3" id="QQ2-1-82"><span 
class="ectt-1000">RDEPEND </span>value</a></span>
<br />&#x00A0;<span class="sectionToc" >7.4 <a 
href="#x1-710007.4" id="QQ2-1-84">Magic Ebuild-defined Variables</a></span>
<br /><span class="chapterToc" >8 <a 
href="#x1-740008" id="QQ2-1-88">Dependencies</a></span>
<br />&#x00A0;<span class="sectionToc" >8.1 <a 
href="#x1-750008.1" id="QQ2-1-89">Dependency Classes</a></span>
<br />&#x00A0;<span class="sectionToc" >8.2 <a 
href="#x1-760008.2" id="QQ2-1-91">Dependency Specification Format</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.1 <a 
href="#x1-770008.2.1" id="QQ2-1-94">All-of Dependency Specifications</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.2 <a 
href="#x1-780008.2.2" id="QQ2-1-95">Use-conditional Dependency Specifications</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.3 <a 
href="#x1-790008.2.3" id="QQ2-1-96">Any-of Dependency Specifications</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.4 <a 
href="#x1-800008.2.4" id="QQ2-1-97">Exactly-one-of Dependency Specifications</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.5 <a 
href="#x1-810008.2.5" id="QQ2-1-98">At-most-one-of Dependency Specifications</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.6 <a 
href="#x1-820008.2.6" id="QQ2-1-99">Package Dependency Specifications</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.7 <a 
href="#x1-890008.2.7" id="QQ2-1-109">Use State Constraints</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.8 <a 
href="#x1-900008.2.8" id="QQ2-1-110">Restrict</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.9 <a 
href="#x1-910008.2.9" id="QQ2-1-111">Properties</a></span>
                                                                            
                                                                            
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >8.2.10 <a 
href="#x1-920008.2.10" id="QQ2-1-112">SRC_URI</a></span>
<br /><span class="chapterToc" >9 <a 
href="#x1-930009" id="QQ2-1-113">Ebuild-defined Functions</a></span>
<br />&#x00A0;<span class="sectionToc" >9.1 <a 
href="#x1-940009.1" id="QQ2-1-114">List of Functions</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.1 <a 
href="#x1-950009.1.1" id="QQ2-1-115">Initial Working Directories</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.2 <a 
href="#x1-960009.1.2" id="QQ2-1-117">pkg_pretend</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.3 <a 
href="#x1-970009.1.3" id="QQ2-1-119">pkg_setup</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.4 <a 
href="#x1-980009.1.4" id="QQ2-1-120">src_unpack</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.5 <a 
href="#x1-990009.1.5" id="QQ2-1-121">src_prepare</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.6 <a 
href="#x1-1000009.1.6" id="QQ2-1-123">src_configure</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.7 <a 
href="#x1-1010009.1.7" id="QQ2-1-125">src_compile</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.8 <a 
href="#x1-1020009.1.8" id="QQ2-1-127">src_test</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.9 <a 
href="#x1-1030009.1.9" id="QQ2-1-129">src_install</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.10 <a 
href="#x1-1040009.1.10" id="QQ2-1-131">pkg_preinst</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.11 <a 
href="#x1-1050009.1.11" id="QQ2-1-132">pkg_postinst</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.12 <a 
href="#x1-1060009.1.12" id="QQ2-1-133">pkg_prerm</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.13 <a 
href="#x1-1070009.1.13" id="QQ2-1-134">pkg_postrm</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.14 <a 
href="#x1-1080009.1.14" id="QQ2-1-135">pkg_config</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.15 <a 
href="#x1-1090009.1.15" id="QQ2-1-136">pkg_info</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.16 <a 
href="#x1-1100009.1.16" id="QQ2-1-138">pkg_nofetch</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >9.1.17 <a 
href="#x1-1110009.1.17" id="QQ2-1-139"><span 
class="ectt-1000">default_ </span>Phase Functions</a></span>
<br />&#x00A0;<span class="sectionToc" >9.2 <a 
href="#x1-1120009.2" id="QQ2-1-141">Call Order</a></span>
<br /><span class="chapterToc" >10 <a 
href="#x1-11300010" id="QQ2-1-142">Eclasses</a></span>
<br />&#x00A0;<span class="sectionToc" >10.1 <a 
href="#x1-11400010.1" id="QQ2-1-143">The inherit command</a></span>
<br />&#x00A0;<span class="sectionToc" >10.2 <a 
href="#x1-11500010.2" id="QQ2-1-144">Eclass-defined Metadata Keys</a></span>
<br />&#x00A0;<span class="sectionToc" >10.3 <a 
href="#x1-11600010.3" id="QQ2-1-145">EXPORT_FUNCTIONS</a></span>
<br /><span class="chapterToc" >11 <a 
href="#x1-11700011" id="QQ2-1-147">The Ebuild Environment</a></span>
<br />&#x00A0;<span class="sectionToc" >11.1 <a 
href="#x1-11800011.1" id="QQ2-1-148">Defined Variables</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >11.1.1 <a 
href="#x1-11900011.1.1" id="QQ2-1-153">USE and IUSE Handling</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >11.1.2 <a 
href="#x1-12000011.1.2" id="QQ2-1-154"><span 
class="ectt-1000">REPLACING_VERSIONS </span>and <span 
class="ectt-1000">REPLACED_BY_VERSION</span></a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >11.1.3 <a 
href="#x1-12100011.1.3" id="QQ2-1-155">Offset-prefix variables <span 
class="ectt-1000">EPREFIX</span>, <span 
class="ectt-1000">EROOT </span>and <span 
class="ectt-1000">ED</span></a></span>
<br />&#x00A0;<span class="sectionToc" >11.2 <a 
href="#x1-12200011.2" id="QQ2-1-157">The state of variables between functions</a></span>
<br />&#x00A0;<span class="sectionToc" >11.3 <a 
href="#x1-12400011.3" id="QQ2-1-160">Available commands</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >11.3.1 <a 
href="#x1-12500011.3.1" id="QQ2-1-161">System commands</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >11.3.2 <a 
href="#x1-12700011.3.2" id="QQ2-1-164">Commands provided by package dependencies</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >11.3.3 <a 
href="#x1-12800011.3.3" id="QQ2-1-165">Ebuild-specific Commands</a></span>
<br />&#x00A0;<span class="sectionToc" >11.4 <a 
href="#x1-14400011.4" id="QQ2-1-199">The state of the system between functions</a></span>
<br /><span class="chapterToc" >12 <a 
href="#x1-14500012" id="QQ2-1-200">Merging and Unmerging</a></span>
<br />&#x00A0;<span class="sectionToc" >12.1 <a 
href="#x1-14700012.1" id="QQ2-1-202">Overview</a></span>
<br />&#x00A0;<span class="sectionToc" >12.2 <a 
href="#x1-14800012.2" id="QQ2-1-203">Directories</a></span>
                                                                            
                                                                            
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.2.1 <a 
href="#x1-14900012.2.1" id="QQ2-1-204">Permissions</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.2.2 <a 
href="#x1-15000012.2.2" id="QQ2-1-205">Empty Directories</a></span>
<br />&#x00A0;<span class="sectionToc" >12.3 <a 
href="#x1-15100012.3" id="QQ2-1-206">Regular Files</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.1 <a 
href="#x1-15200012.3.1" id="QQ2-1-207">Permissions</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.2 <a 
href="#x1-15300012.3.2" id="QQ2-1-208">File modification times</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.3.3 <a 
href="#x1-15400012.3.3" id="QQ2-1-210">Configuration File Protection</a></span>
<br />&#x00A0;<span class="sectionToc" >12.4 <a 
href="#x1-15500012.4" id="QQ2-1-211">Symlinks</a></span>
<br />&#x00A0;&#x00A0;<span class="subsectionToc" >12.4.1 <a 
href="#x1-15600012.4.1" id="QQ2-1-212">Rewriting</a></span>
<br />&#x00A0;<span class="sectionToc" >12.5 <a 
href="#x1-15700012.5" id="QQ2-1-213">Hard links</a></span>
<br />&#x00A0;<span class="sectionToc" >12.6 <a 
href="#x1-15800012.6" id="QQ2-1-214">Other Files</a></span>
<br /><span class="chapterToc" >13 <a 
href="#x1-15900013" id="QQ2-1-215">Metadata Cache</a></span>
<br />&#x00A0;<span class="sectionToc" >13.1 <a 
href="#x1-16000013.1" id="QQ2-1-216">Directory Contents</a></span>
<br />&#x00A0;<span class="sectionToc" >13.2 <a 
href="#x1-16100013.2" id="QQ2-1-217">Cache File Format</a></span>
<br /><span class="chapterToc" >14 <a 
href="#x1-16200014" id="QQ2-1-218">Glossary</a></span>
<br /><span class="appendixToc" >A <a 
href="#x1-163000A" id="QQ2-1-219">metadata.xml</a></span>
<br /><span class="appendixToc" >B <a 
href="#x1-164000B" id="QQ2-1-220">Unspecified Items</a></span>
<br /><span class="appendixToc" >C <a 
href="#x1-165000C" id="QQ2-1-221">Historical Curiosities</a></span>
<br />&#x00A0;<span class="sectionToc" >C.1 <a 
href="#x1-166000C.1" id="QQ2-1-222">If-else use blocks</a></span>
<br />&#x00A0;<span class="sectionToc" >C.2 <a 
href="#x1-167000C.2" id="QQ2-1-224">cvs Versions</a></span>
<br />&#x00A0;<span class="sectionToc" >C.3 <a 
href="#x1-168000C.3" id="QQ2-1-225">use.defaults</a></span>
<br />&#x00A0;<span class="sectionToc" >C.4 <a 
href="#x1-169000C.4" id="QQ2-1-226">Old-style Virtuals</a></span>
<br /><span class="appendixToc" >D <a 
href="#x1-170000D" id="QQ2-1-227">Feature Availability by EAPI</a></span>
<br /><span class="appendixToc" >E <a 
href="#x1-172000E" id="QQ2-1-230">Differences Between EAPIs</a></span>
<br /><span class="appendixToc" >F <a 
href="#x1-181000F" id="QQ2-1-239">Desk Reference</a></span>
</div>
                                                                            
                                                                            
<h2 class="likechapterHead"><a 
 id="x1-2000"></a>List of Algorithms</h2><div class="tableofcontents">
1 <a 
href="#x1-29001r1">Version comparison top-level logic</a>
<br />2 <a 
href="#x1-29008r2">Version comparison logic for numeric components</a>
<br />3 <a 
href="#x1-29025r3">Version comparison logic for each numeric component after the first</a>
<br />4 <a 
href="#x1-29041r4">Version comparison logic for letter components</a>
<br />5 <a 
href="#x1-29049r5">Version comparison logic for suffixes</a>
<br />6 <a 
href="#x1-29069r6">Version comparison logic for each suffix</a>
<br />7 <a 
href="#x1-29083r7">Version comparison logic for revision components</a>
<br />8 <a 
href="#x1-58002r8">USE masking logic</a>
<br />9 <a 
href="#x1-135002r9">econf --libdir logic</a>
<br />10 <a 
href="#x1-136001r10">Determining the library directory</a>
</div>
                                                                            
                                                                            
<h2 class="likechapterHead"><a 
 id="x1-3000"></a>Listings</h2><div class="tableofcontents">
10.1 <a 
href="#x1-116001r1">EXPORT_FUNCTIONS example: foo.eclass</a>
<br />11.1 <a 
href="#x1-123001r1">Environment state between functions</a>
<br />11.2 <a 
href="#x1-135017r2">einstall command</a>
<br />C.1 <a 
href="#x1-166001r1">If-else use blocks</a>
</div>
                                                                            
                                                                            
<h2 class="likechapterHead"><a 
 id="x1-4000"></a>List of Tables</h2><div class="tableofcontents"><span class="lotToc" >5.1&#x00A0;<a 
href="#x1-58001r1">Profile directory support for masking/forcing use flags in stable
versions only</a></span><br /><span class="lotToc" >5.2&#x00A0;<a 
href="#x1-60001r2">Profile-defined <span 
class="ectt-1000">IUSE </span>injection for EAPIs</a></span><br /><span class="lotToc" >7.1&#x00A0;<a 
href="#x1-67001r1">EAPIs supporting
<span 
class="ectt-1000">IUSE </span>defaults</a></span><br /><span class="lotToc" >7.2&#x00A0;<a 
href="#x1-67002r2">EAPIs supporting various ebuild-defined variables</a></span><br /><span class="lotToc" >7.3&#x00A0;<a 
href="#x1-70001r3">EAPIs with
<span 
class="ectt-1000">RDEPEND=DEPEND </span>Default</a></span><br /><span class="lotToc" >7.4&#x00A0;<a 
href="#x1-73001r4">EAPIs supporting <span 
class="ectt-1000">DEFINED_PHASES</span></a></span><br /><span class="lotToc" >8.1&#x00A0;<a 
href="#x1-75001r1">Dependency classes
required to be satisfied for a particular phase function</a></span><br /><span class="lotToc" >8.2&#x00A0;<a 
href="#x1-76001r2">EAPIs supporting <span 
class="ectt-1000">SRC_URI</span>
arrows</a></span><br /><span class="lotToc" >8.3&#x00A0;<a 
href="#x1-76002r3">EAPIs supporting <span 
class="ectt-1000">REQUIRED_USE ?? </span>groups</a></span><br /><span class="lotToc" >8.4&#x00A0;<a 
href="#x1-83001r4">Support for <span 
class="ectt-1000">SLOT </span>dependencies
and sub-slots in EAPIs</a></span><br /><span class="lotToc" >8.5&#x00A0;<a 
href="#x1-83002r5">EAPIs supporting <span 
class="ectt-1000">USE </span>dependencies</a></span><br /><span class="lotToc" >8.6&#x00A0;<a 
href="#x1-85001r6">Exclamation
mark strengths for EAPIs</a></span><br /><span class="lotToc" >9.1&#x00A0;<a 
href="#x1-95001r1">EAPIs with <span 
class="ectt-1000">S </span>to <span 
class="ectt-1000">WORKDIR </span>fallbacks</a></span><br /><span class="lotToc" >9.2&#x00A0;<a 
href="#x1-96001r2">EAPIs
supporting <span 
class="ectt-1000">pkg_pretend</span></a></span><br /><span class="lotToc" >9.3&#x00A0;<a 
href="#x1-99001r3">EAPIs supporting <span 
class="ectt-1000">src_prepare</span></a></span><br /><span class="lotToc" >9.4&#x00A0;<a 
href="#x1-100001r4">EAPIs supporting
<span 
class="ectt-1000">src_configure</span></a></span><br /><span class="lotToc" >9.5&#x00A0;<a 
href="#x1-101001r5"><span 
class="ectt-1000">src_compile </span>behaviour for EAPIs</a></span><br /><span class="lotToc" >9.6&#x00A0;<a 
href="#x1-102001r6"><span 
class="ectt-1000">src_test </span>behaviour for
EAPIs</a></span><br /><span class="lotToc" >9.7&#x00A0;<a 
href="#x1-103001r7"><span 
class="ectt-1000">src_install </span>behaviour for EAPIs</a></span><br /><span class="lotToc" >9.8&#x00A0;<a 
href="#x1-109001r8">EAPIs supporting <span 
class="ectt-1000">pkg_info </span>on
non-installed packages</a></span><br /><span class="lotToc" >9.9&#x00A0;<a 
href="#x1-111001r9">EAPIs supporting <span 
class="ectt-1000">default_ </span>phase functions</a></span><br /><span class="lotToc" >11.1&#x00A0;<a 
href="#x1-118002">Defined
variables</a></span><br /><span class="lotToc" >11.2&#x00A0;<a 
href="#x1-118007r2">EAPIs supporting various added env variables</a></span><br /><span class="lotToc" >11.3&#x00A0;<a 
href="#x1-118008r3">EAPIs supporting
various removed env variables</a></span><br /><span class="lotToc" >11.4&#x00A0;<a 
href="#x1-118009r4">EAPIs supporting offset-prefix env variables</a></span><br /><span class="lotToc" >11.5&#x00A0;<a 
href="#x1-121001r5">EAPIs
supporting offset-prefix</a></span><br /><span class="lotToc" >11.6&#x00A0;<a 
href="#x1-126002r6"><span 
class="ectt-1000">find </span>implementation for EAPIs</a></span><br /><span class="lotToc" >11.7&#x00A0;<a 
href="#x1-129001r7">EAPI Command
Failure Behaviour</a></span><br /><span class="lotToc" >11.8&#x00A0;<a 
href="#x1-130001r8">Banned commands</a></span><br /><span class="lotToc" >11.9&#x00A0;<a 
href="#x1-135001r9">Extra <span 
class="ectt-1000">econf </span>arguments for
EAPIs</a></span><br /><span class="lotToc" >11.10&#x00A0;<a 
href="#x1-136018r10">EAPIs supporting <span 
class="ectt-1000">dodoc -r</span></a></span><br /><span class="lotToc" >11.11&#x00A0;<a 
href="#x1-136019r11">EAPIs supporting <span 
class="ectt-1000">doheader </span>and
<span 
class="ectt-1000">newheader</span></a></span><br /><span class="lotToc" >11.12&#x00A0;<a 
href="#x1-136020r12">EAPIs supporting symlinks for <span 
class="ectt-1000">doins</span></a></span><br /><span class="lotToc" >11.13&#x00A0;<a 
href="#x1-136021r13"><span 
class="ectt-1000">doman </span>language support
options for EAPIs</a></span><br /><span class="lotToc" >11.14&#x00A0;<a 
href="#x1-136022r14">EAPIs supporting stdin for <span 
class="ectt-1000">new* </span>commands</a></span><br /><span class="lotToc" >11.15&#x00A0;<a 
href="#x1-136023r15">EAPIs
supporting <span 
class="ectt-1000">--host-root </span>for <span 
class="ectt-1000">*_version </span>commands</a></span><br /><span class="lotToc" >11.16&#x00A0;<a 
href="#x1-138001r16">EAPIs supporting controllable
compression</a></span><br /><span class="lotToc" >11.17&#x00A0;<a 
href="#x1-139001r17">EAPI Behaviour for Use Queries not in IUSE_EFFECTIVE</a></span><br /><span class="lotToc" >11.18&#x00A0;<a 
href="#x1-139002r18">EAPIs
supporting empty third argument in <span 
class="ectt-1000">use_with </span>and <span 
class="ectt-1000">use_enable</span></a></span><br /><span class="lotToc" >11.19&#x00A0;<a 
href="#x1-139003r19">EAPIs supporting
<span 
class="ectt-1000">usex</span></a></span><br /><span class="lotToc" >11.20&#x00A0;<a 
href="#x1-141001r20"><span 
class="ectt-1000">unpack </span>extensions for EAPIs</a></span><br /><span class="lotToc" >11.21&#x00A0;<a 
href="#x1-141002r21">EAPIs supporting the <span 
class="ectt-1000">default</span>
function</a></span><br /><span class="lotToc" >12.1&#x00A0;<a 
href="#x1-153001r1">Preservation of file modification times (mtimes)</a></span><br /><span class="lotToc" >D.1&#x00A0;<a 
href="#x1-171002">Features in EAPIs</a></span><br />
</div>
                                                                            
                                                                            
<h3 class="likesectionHead"><a 
 id="x1-5000"></a>Acknowledgements</h3>
<!--l. 3--><p class="noindent" >Thanks to Mike Kelly (package manager provided utilities, section&#x00A0;<a 
href="#x1-12800011.3.3">11.3.3<!--tex4ht:ref: sec:pkg-mgr-commands --></a>), Danny van Dyk (ebuild
functions, section&#x00A0;<a 
href="#x1-930009">9<!--tex4ht:ref: sec:ebuild-functions --></a>), David Leverton (various sections), Petteri R&auml;ty (environment state,
section&#x00A0;<a 
href="#x1-12200011.2">11.2<!--tex4ht:ref: sec:ebuild-env-state --></a>) and Micha&#322; G&oacute;rny (various sections) for contributions. Thanks also to
Mike Frysinger and Brian Harring for proof-reading and suggestions for fixes and/or
clarification.
</p><!--l. 9--><p class="noindent" >
</p>
<h3 class="likesectionHead"><a 
 id="x1-6000"></a>Copyright and Licence</h3>
<!--l. 11--><p class="noindent" >The bulk of this document is <span 
class="cmsy-10">&copy; </span>2007, 2008, 2009 Stephen Bennett and Ciaran McCreesh.
Contributions are owned by their respective authors, and may have been changed substantially
before inclusion.
</p><!--l. 15--><p class="noindent" >This document is released under the Creative Commons Attribution-Share Alike 3.0 Licence. The
full text of this licence can be found at <a 
href="http://creativecommons.org/licenses/by-sa/3.0/" class="url" ><span 
class="ectt-1000">http://creativecommons.org/licenses/by-sa/3.0/</span></a>.
</p><!--l. 18--><p class="noindent" >
</p>
<h3 class="likesectionHead"><a 
 id="x1-7000"></a>Reporting Issues</h3>
<!--l. 20--><p class="noindent" >Issues (inaccuracies, wording problems, omissions etc.)&#x00A0;in this document should be reported via
Gentoo Bugzilla using product <span 
class="ecti-1000">Gentoo Hosted Projects</span>, component <span 
class="ecti-1000">PMS/EAPI </span>and the default
assignee. There should be one bug per issue, and one issue per bug.
</p><!--l. 24--><p class="noindent" >Patches (in <span 
class="ectt-1000">git format-patch </span>form if possible) may be submitted either via Bugzilla or to the
<span 
class="ectt-1000">gentoo-pms@gentoo.org </span>mailing list. Patches will be reviewed by the PMS team, who will do one
of the following:
</p><!--l. 29--><p class="noindent" >
     </p><ul>
     <li class="compactitem">Accept and apply the patch.
     </li>
     <li class="compactitem">Explain why the patch cannot be applied as-is. The patch may then be updated and
     resubmitted if appropriate.
     </li>
     <li class="compactitem">Reject the patch outright.
     </li>
     <li class="compactitem">Take special action merited by the individual circumstances.</li></ul>
<!--l. 36--><p class="noindent" >When reporting issues, remember that this document is not the appropriate place for pushing
through changes to the tree or the package manager, except where those changes are
bugs.
</p><!--l. 39--><p class="noindent" >If any issue cannot be resolved by the PMS team, it may be escalated to the Gentoo
Council.
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;1</span><br /><a 
 id="x1-80001"></a>Introduction</h2>
<h3 class="sectionHead"><span class="titlemark">1.1   </span> <a 
 id="x1-90001.1"></a>Aims and Motivation</h3>
<!--l. 5--><p class="noindent" >This document aims to fully describe the format of an ebuild repository and the ebuilds therein,
as well as certain aspects of package manager behaviour required to support such a
repository.
</p><!--l. 8--><p class="noindent" >This document is <span 
class="ecti-1000">not </span>designed to be an introduction to ebuild development. Prior knowledge of
ebuild creation and an understanding of how the package management system works is assumed;
certain less familiar terms are explained in the Glossary in chapter&#x00A0;<a 
href="#x1-16200014">14<!--tex4ht:ref: sec:glossary --></a>.
</p><!--l. 12--><p class="noindent" >This document does not specify any user or package manager configuration information.
</p><!--l. 14--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">1.2   </span> <a 
 id="x1-100001.2"></a>Rationale</h3>
<!--l. 16--><p class="noindent" >At present the only definition of what an ebuild can assume about its environment,
and the only definition of what is valid in an ebuild, is the source code of the latest
Portage release and a general consensus about which features are too new to assume
availability. This has several drawbacks: not only is it impossible to change any aspect of
Portage behaviour without verifying that nothing in the tree relies upon it, but if a new
package manager should appear it becomes impossible to fully support such an ill-defined
standard.
</p><!--l. 23--><p class="noindent" >This document aims to address both of these concerns by defining almost all aspects of what an
ebuild repository looks like, and how an ebuild is allowed to behave. Thus, both Portage and other
package managers can change aspects of their behaviour not defined here without worry of
incompatibilities with any particular repository.
</p><!--l. 28--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">1.3   </span> <a 
 id="x1-110001.3"></a>Conventions</h3>
<!--l. 30--><p class="noindent" >Text in <span 
class="ectt-1000">teletype </span>is used for filenames or variable names. <span 
class="ecti-1000">Italic </span>text is used for terms with a
particular technical meaning in places where there may otherwise be ambiguity.
</p><!--l. 33--><p class="noindent" >The term <span 
class="ecti-1000">package manager </span>is used throughout this document in a broad sense. Although some
parts of this document are only relevant to fully featured package managers, many items are
equally applicable to tools or other applications that interact with ebuilds or ebuild
repositories.
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;2</span><br /><a 
 id="x1-120002"></a>EAPIs</h2>
<h3 class="sectionHead"><span class="titlemark">2.1   </span> <a 
 id="x1-130002.1"></a>Definition</h3>
<!--l. 5--><p class="noindent" >An EAPI can be thought of as a &#8216;version&#8217; of this specification to which a package conforms. An
EAPI value is a string as per section&#x00A0;<a 
href="#x1-270003.1.7">3.1.7<!--tex4ht:ref: sec:eapi-names --></a>, and is part of an ebuild&#8217;s metadata.
</p><!--l. 8--><p class="noindent" >If a package manager encounters a package version with an unrecognised EAPI, it must not
attempt to perform any operations upon it. It could, for example, ignore the package version
entirely (although this can lead to user confusion), or it could mark the package version as masked.
A package manager must not use any metadata generated from a package with an unrecognised
EAPI.
</p><!--l. 13--><p class="noindent" >The package manager must not attempt to perform any kind of comparison test other than
equality upon EAPIs.
</p><!--l. 16--><p class="noindent" >EAPIs are also used for profile directories, as described in section&#x00A0;<a 
href="#x1-480005.2.2">5.2.2<!--tex4ht:ref: sec:profile-eapi --></a>.
</p><!--l. 18--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">2.2   </span> <a 
 id="x1-140002.2"></a>Defined EAPIs</h3>
<!--l. 20--><p class="noindent" >The following EAPIs are defined by this specification:
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">0</span> </dt><dd 
class="description">The &#8216;original&#8217; base EAPI.
     </dd><dt class="description">
<span 
class="ecbx-1000">1</span> </dt><dd 
class="description">EAPI &#8216;1&#8217; contains a number of extensions to EAPI &#8216;0&#8217;. Except where explicitly noted, it
     is in all other ways identical to EAPI &#8216;0&#8217;.
     </dd><dt class="description">
<span 
class="ecbx-1000">2</span> </dt><dd 
class="description">EAPI &#8216;2&#8217; contains a number of extensions to EAPI &#8216;1&#8217;. Except where explicitly noted, it
     is in all other ways identical to EAPI &#8216;1&#8217;.
     </dd><dt class="description">
<span 
class="ecbx-1000">3</span> </dt><dd 
class="description">EAPI &#8216;3&#8217; contains a number of extensions to EAPI &#8216;2&#8217;. Except where explicitly noted, it
     is in all other ways identical to EAPI &#8216;2&#8217;.
     </dd><dt class="description">
<span 
class="ecbx-1000">4</span> </dt><dd 
class="description">EAPI &#8216;4&#8217; contains a number of extensions to EAPI &#8216;3&#8217;. Except where explicitly noted, it
     is in all other ways identical to EAPI &#8216;3&#8217;.
     </dd><dt class="description">
<span 
class="ecbx-1000">5</span> </dt><dd 
class="description">EAPI &#8216;5&#8217; contains a number of extensions to EAPI &#8216;4&#8217;. Except where explicitly noted, it
     is in all other ways identical to EAPI &#8216;4&#8217;.</dd></dl>
<!--l. 37--><p class="noindent" >Except where explicitly noted, everything in this specification applies to all of the above
EAPIs.<span class="footnote-mark"><a 
href="pms2.html#fn1x3"><sup class="textsuperscript">1</sup></a></span><a 
 id="x1-14001f1"></a> 
                                                                            
                                                                            
</p>
<h3 class="sectionHead"><span class="titlemark">2.3   </span> <a 
 id="x1-150002.3"></a>Reserved EAPIs</h3>
<!--l. 46--><p class="noindent" >
     </p><ul>
     <li class="compactitem">EAPIs whose value consists purely of an integer are reserved for future versions of this
     specification.
     </li>
     <li class="compactitem">EAPIs whose value starts with the string <span 
class="ectt-1000">paludis- </span>are reserved for experimental use
     by the Paludis package manager.</li></ul>
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;3</span><br /><a 
 id="x1-160003"></a>Names and Versions</h2>
<h3 class="sectionHead"><span class="titlemark">3.1   </span> <a 
 id="x1-170003.1"></a>Restrictions upon Names</h3>
<!--l. 5--><p class="noindent" >No name may be empty. Package managers must not impose fixed upper boundaries upon the
length of any name. A package manager should indicate or reject any name that is invalid
according to these rules.
</p><!--l. 8--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.1   </span> <a 
 id="x1-180003.1.1"></a>Category Names</h4>
<!--l. 9--><p class="noindent" >A category name may contain any of the characters [<span 
class="ectt-1000">A-Za-z0-9+_.-</span>]. It must not begin with a
hyphen, a dot or a plus sign.
</p>
<!--l. 12--><p class="noindent" ><span class="paragraphHead"><a 
 id="x1-190003.1.1"></a><span 
class="ecbx-1000">Note:</span></span>
A hyphen is <span 
class="ecti-1000">not </span>required because of the <span 
class="ectt-1000">virtual </span>category. Usually, however, category names will
contain a hyphen.
</p><!--l. 15--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.2   </span> <a 
 id="x1-200003.1.2"></a>Package Names</h4>
<!--l. 16--><p class="noindent" >A package name may contain any of the characters [<span 
class="ectt-1000">A-Za-z0-9+_-</span>]. It must not begin
with a hyphen or a plus sign, and must not end in a hyphen followed by one or more
digits.
</p>
<!--l. 19--><p class="noindent" ><span class="paragraphHead"><a 
 id="x1-210003.1.2"></a><span 
class="ecbx-1000">Note:</span></span>
A package name does not include the category. The term <span 
class="ecti-1000">qualified package name </span>is used where a
<span 
class="ectt-1000">category/package </span>pair is meant.
</p><!--l. 22--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.3   </span> <a 
 id="x1-220003.1.3"></a>Slot Names</h4>
<!--l. 24--><p class="noindent" >A slot name may contain any of the characters [<span 
class="ectt-1000">A-Za-z0-9+_.-</span>]. It must not begin with a hyphen,
a dot or a plus sign.
                                                                            
                                                                            
</p><!--l. 27--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.4   </span> <a 
 id="x1-230003.1.4"></a>USE Flag Names</h4>
<!--l. 28--><p class="noindent" >A USE flag name may contain any of the characters [<span 
class="ectt-1000">A-Za-z0-9+_@-</span>]. It must begin with an
alphanumeric character. Underscores should be considered reserved for <span 
class="ectt-1000">USE_EXPAND</span>, as described in
section&#x00A0;<a 
href="#x1-11900011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a>.
</p>
<!--l. 32--><p class="noindent" ><span class="paragraphHead"><a 
 id="x1-240003.1.4"></a><span 
class="ecbx-1000">Note:</span></span>
The at-sign is required for <span 
class="ectt-1000">LINGUAS</span>.
</p><!--l. 34--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.5   </span> <a 
 id="x1-250003.1.5"></a>Repository Names</h4>
<!--l. 36--><p class="noindent" >A repository name may contain any of the characters [<span 
class="ectt-1000">A-Za-z0-9_-</span>]. It must not begin with a
hyphen. In addition, every repository name must also be a valid package name.
</p><!--l. 39--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.6   </span> <a 
 id="x1-260003.1.6"></a>Keyword Names</h4>
<!--l. 41--><p class="noindent" >A keyword name may contain any of the characters [<span 
class="ectt-1000">A-Za-z0-9_-</span>]. It must not begin with a
hyphen. In contexts where it makes sense to do so, a keyword name may be prefixed by a tilde or a
hyphen. In <span 
class="ectt-1000">KEYWORDS</span>, <span 
class="ectt-1000">-* </span>is also acceptable as a keyword.
</p><!--l. 45--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">3.1.7   </span> <a 
 id="x1-270003.1.7"></a>EAPI Names</h4>
<!--l. 47--><p class="noindent" >An EAPI name may contain any of the characters [<span 
class="ectt-1000">A-Za-z0-9+_.-</span>]. It must not begin with a
hyphen, a dot or a plus sign.
</p><!--l. 50--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">3.2   </span> <a 
 id="x1-280003.2"></a>Version Specifications</h3>
<!--l. 51--><p class="noindent" >The package manager must not impose fixed limits upon the number of version components.
Package managers should indicate or reject any version that is invalid according to these
rules.
</p><!--l. 54--><p class="noindent" >A version starts with the number part, which is in the form <span 
class="ectt-1000">[0-9]+(</span><span 
class="cmsy-10">\</span><span 
class="ectt-1000">.[0-9]+)* </span>(a positive
integer, followed by zero or more dot-prefixed positive integers).
</p><!--l. 57--><p class="noindent" >This may optionally be followed by one of <span 
class="ectt-1000">[a-z] </span>(a lowercase letter).
                                                                            
                                                                            
</p><!--l. 59--><p class="noindent" >This may be followed by zero or more of the suffixes <span 
class="ectt-1000">_alpha</span>, <span 
class="ectt-1000">_beta</span>, <span 
class="ectt-1000">_pre</span>, <span 
class="ectt-1000">_rc </span>or <span 
class="ectt-1000">_p</span>, which
themselves may be suffixed by an optional integer.
</p><!--l. 62--><p class="noindent" >This may optionally be followed by the suffix <span 
class="ectt-1000">-r </span>followed immediately by an integer (the &#8220;revision
number&#8221;). If this suffix is not present, it is assumed to be <span 
class="ectt-1000">-r0</span>.
</p><!--l. 65--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">3.3   </span> <a 
 id="x1-290003.3"></a>Version Comparison</h3>
<!--l. 67--><p class="noindent" >Version specifications are compared component by component, moving from left to right, as
detailed in Algorithm&#x00A0;<a 
href="#x1-29001r1">1<!--tex4ht:ref: alg:version-comparison --></a> and sub-algorithms. If a sub-algorithm returns a decision, then that is the
result of the whole comparison; if it terminates without returning a decision, the process continues
from the point from which it was invoked.
</p>
<div class="algorithm">
                                                                            
                                                                            
<!--l. 74--><p class="noindent" ><a 
 id="x1-29001r1"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Algorithm 1: </span><span  
class="content">Version comparison top-level logic</span></div><!--tex4ht:label?: x1-29001r1 -->
<div class="algorithmic">
<a 
 id="x1-29002r1"></a>
 <span class="ALCitem"><span class="ecrm-0800">&#x2007;1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let <span 
class="cmmi-10">A </span>and <span 
class="cmmi-10">B </span>be the versions to be compared <a 
 id="x1-29003r2"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> compare numeric components using Algorithm&#x00A0;<a 
href="#x1-29008r2">2<!--tex4ht:ref: alg:version-comparison-numeric --></a> <a 
 id="x1-29004r3"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> compare letter components using Algorithm&#x00A0;<a 
href="#x1-29041r4">4<!--tex4ht:ref: alg:version-comparison-letter --></a> <a 
 id="x1-29005r4"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> compare suffixes using Algorithm&#x00A0;<a 
href="#x1-29049r5">5<!--tex4ht:ref: alg:version-comparison-suffix --></a> <a 
 id="x1-29006r5"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> compare revision components using Algorithm&#x00A0;<a 
href="#x1-29083r7">7<!--tex4ht:ref: alg:version-comparison-revision --></a> <a 
 id="x1-29007r6"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A </span><span 
class="cmr-10">= </span><span 
class="cmmi-10">B</span>
</div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="algorithm">
                                                                            
                                                                            
<!--l. 86--><p class="noindent" ><a 
 id="x1-29008r2"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Algorithm 2: </span><span  
class="content">Version comparison logic for numeric components</span></div><!--tex4ht:label?: x1-29008r2 -->
<div class="algorithmic">
<a 
 id="x1-29009r7"></a>
 <span class="ALCitem"><span class="ecrm-0800">&#x2007;1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> define the notations <span 
class="cmmi-10">An</span><sub><span 
class="cmmi-7">k</span></sub> and <span 
class="cmmi-10">Bn</span><sub><span 
class="cmmi-7">k</span></sub> to mean the <span 
class="cmmi-10">k</span><sup class="textsuperscript"><span 
class="ecrm-0900">th</span></sup> numeric component of <span 
class="cmmi-10">A </span>and <span 
class="cmmi-10">B</span>
   respectively, using <span 
class="cmr-10">0</span>-based indexing <a 
 id="x1-29010r8"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">An</span><sub><span 
class="cmr-7">0</span></sub> <span 
class="cmmi-10">&#x003E; Bn</span><sub><span 
class="cmr-7">0</span></sub> using integer comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29011r9"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003E; B</span>
   </span><a 
 id="x1-29012r10"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">An</span><sub><span 
class="cmr-7">0</span></sub> <span 
class="cmmi-10">&#x003C; Bn</span><sub><span 
class="cmr-7">0</span></sub> using integer comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29013r11"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003C; B</span>
   </span><a 
 id="x1-29014r12"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span><a 
 id="x1-29015r13"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let <span 
class="cmmi-10">Ann </span>be the number of numeric components of <span 
class="cmmi-10">A</span> <a 
 id="x1-29016r14"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let <span 
class="cmmi-10">Bnn </span>be the number of numeric components of <span 
class="cmmi-10">B</span> <a 
 id="x1-29017r15"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">for all</span>&#x00A0;<span 
class="cmmi-10">i </span>such that <span 
class="cmmi-10">i </span><span 
class="cmsy-10">&ge; </span><span 
class="cmr-10">1 </span>and <span 
class="cmmi-10">i &#x003C; Ann </span>and <span 
class="cmmi-10">i &#x003C; Bnn</span>, in ascending order&#x00A0;<span 
class="ecbx-1000">do</span><span class="for-body">
<a 
 id="x1-29018r16"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   compare <span 
class="cmmi-10">An</span><sub><span 
class="cmmi-7">i</span></sub> and <span 
class="cmmi-10">Bn</span><sub><span 
class="cmmi-7">i</span></sub> using Algorithm&#x00A0;<a 
href="#x1-29025r3">3<!--tex4ht:ref: alg:version-comparison --></a>
   </span><a 
 id="x1-29019r17"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">for</span><a 
 id="x1-29020r18"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">Ann &#x003E; Bnn</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29021r19"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003E; B</span>
   </span><a 
 id="x1-29022r20"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">Ann &#x003C; Bnn</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29023r21"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">15:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003C; B</span>
   </span><a 
 id="x1-29024r22"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">16:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
</div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="algorithm">
                                                                            
                                                                            
<!--l. 108--><p class="noindent" ><a 
 id="x1-29025r3"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Algorithm 3: </span><span  
class="content">Version comparison logic for each numeric component after the first</span></div><!--tex4ht:label?: x1-29025r3 -->
<div class="algorithmic">
<a 
 id="x1-29026r23"></a>
 <span class="ALCitem"><span class="ecrm-0800">&#x2007;1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;either <span 
class="cmmi-10">An</span><sub><span 
class="cmmi-7">i</span></sub> or <span 
class="cmmi-10">Bn</span><sub><span 
class="cmmi-7">i</span></sub> has a leading <span 
class="ectt-1000">0</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29027r24"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   let <span 
class="cmmi-10">An</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub> be <span 
class="cmmi-10">An</span><sub><span 
class="cmmi-7">i</span></sub> with any trailing <span 
class="ectt-1000">0</span>s removed <a 
 id="x1-29028r25"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   let <span 
class="cmmi-10">Bn</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub> be <span 
class="cmmi-10">Bn</span><sub><span 
class="cmmi-7">i</span></sub> with any trailing <span 
class="ectt-1000">0</span>s removed <a 
 id="x1-29029r26"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">An</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub> <span 
class="cmmi-10">&#x003E; Bn</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub> using ASCII stringwise comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29030r27"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003E; B</span>
     </span><a 
 id="x1-29031r28"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">An</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub> <span 
class="cmmi-10">&#x003C; Bn</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub> using ASCII stringwise comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29032r29"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003C; B</span>
     </span><a 
 id="x1-29033r30"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
   </span><a 
 id="x1-29034r31"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">else</span><span class="else-body">
<a 
 id="x1-29035r32"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">An</span><sub><span 
class="cmmi-7">i</span></sub> <span 
class="cmmi-10">&#x003E; Bn</span><sub><span 
class="cmmi-7">i</span></sub> using integer comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29036r33"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003E; B</span>
     </span><a 
 id="x1-29037r34"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">An</span><sub><span 
class="cmmi-7">i</span></sub> <span 
class="cmmi-10">&#x003C; Bn</span><sub><span 
class="cmmi-7">i</span></sub> using integer comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29038r35"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003C; B</span>
     </span><a 
 id="x1-29039r36"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
   </span><a 
 id="x1-29040r37"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">15:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
</div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="algorithm">
                                                                            
                                                                            
<!--l. 129--><p class="noindent" ><a 
 id="x1-29041r4"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Algorithm 4: </span><span  
class="content">Version comparison logic for letter components</span></div><!--tex4ht:label?: x1-29041r4 -->
<div class="algorithmic">
<a 
 id="x1-29042r38"></a>
 <span class="ALCitem"><span class="ecrm-0800">&#x2007;1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let <span 
class="cmmi-10">Al </span>be the letter component of <span 
class="cmmi-10">A </span>if any, otherwise the empty string <a 
 id="x1-29043r39"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let <span 
class="cmmi-10">Bl </span>be the letter component of <span 
class="cmmi-10">B </span>if any, otherwise the empty string <a 
 id="x1-29044r40"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">Al &#x003E; Bl </span>using ASCII stringwise comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29045r41"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003E; B</span>
   </span><a 
 id="x1-29046r42"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">Al &#x003C; Bl </span>using ASCII stringwise comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29047r43"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003C; B</span>
   </span><a 
 id="x1-29048r44"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
</div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="algorithm">
                                                                            
                                                                            
<!--l. 142--><p class="noindent" ><a 
 id="x1-29049r5"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Algorithm 5: </span><span  
class="content">Version comparison logic for suffixes</span></div><!--tex4ht:label?: x1-29049r5 -->
<div class="algorithmic">
<a 
 id="x1-29050r45"></a>
 <span class="ALCitem"><span class="ecrm-0800">&#x2007;1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> define the notations <span 
class="cmmi-10">As</span><sub><span 
class="cmmi-7">k</span></sub> and <span 
class="cmmi-10">Bs</span><sub><span 
class="cmmi-7">k</span></sub> to mean the <span 
class="cmmi-10">k</span><sup class="textsuperscript"><span 
class="ecrm-0900">th</span></sup> suffix of <span 
class="cmmi-10">A </span>and <span 
class="cmmi-10">B </span>respectively, using
   <span 
class="cmr-10">0</span>-based indexing <a 
 id="x1-29051r46"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let <span 
class="cmmi-10">Asn </span>be the number of suffixes of <span 
class="cmmi-10">A</span> <a 
 id="x1-29052r47"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let <span 
class="cmmi-10">Bsn </span>be the number of suffixes of <span 
class="cmmi-10">B</span> <a 
 id="x1-29053r48"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">for all</span>&#x00A0;<span 
class="cmmi-10">i </span>such that <span 
class="cmmi-10">i </span><span 
class="cmsy-10">&ge; </span><span 
class="cmr-10">0 </span>and <span 
class="cmmi-10">i &#x003C; Asn </span>and <span 
class="cmmi-10">i &#x003C; Bsn</span>, in ascending order&#x00A0;<span 
class="ecbx-1000">do</span><span class="for-body">
<a 
 id="x1-29054r49"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   compare <span 
class="cmmi-10">As</span><sub><span 
class="cmmi-7">i</span></sub> and <span 
class="cmmi-10">Bs</span><sub><span 
class="cmmi-7">i</span></sub> using Algorithm&#x00A0;<a 
href="#x1-29069r6">6<!--tex4ht:ref: alg:version-comparison --></a>
   </span><a 
 id="x1-29055r50"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">for</span><a 
 id="x1-29056r51"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">Asn &#x003E; Bsn</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29057r52"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">As</span><sub><span 
class="cmmi-7">Bsn</span></sub> is of type <span 
class="ectt-1000">_p</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29058r53"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003E; B</span>
     </span><a 
 id="x1-29059r54"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">else</span><span class="else-body">
<a 
 id="x1-29060r55"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003C; B</span>
     </span><a 
 id="x1-29061r56"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
   </span><a 
 id="x1-29062r57"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">Asn &#x003C; Bsn</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29063r58"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">Bs</span><sub><span 
class="cmmi-7">Asn</span></sub> is of type <span 
class="ectt-1000">_p</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29064r59"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">15:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003C; B</span>
     </span><a 
 id="x1-29065r60"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">16:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">else</span><span class="else-body">
<a 
 id="x1-29066r61"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">17:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003E; B</span>
     </span><a 
 id="x1-29067r62"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">18:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
   </span><a 
 id="x1-29068r63"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">19:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
</div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="algorithm">
                                                                            
                                                                            
<!--l. 167--><p class="noindent" ><a 
 id="x1-29069r6"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Algorithm 6: </span><span  
class="content">Version comparison logic for each suffix</span></div><!--tex4ht:label?: x1-29069r6 -->
<div class="algorithmic">
<a 
 id="x1-29070r64"></a>
 <span class="ALCitem"><span class="ecrm-0800">&#x2007;1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">As</span><sub><span 
class="cmmi-7">i</span></sub> and <span 
class="cmmi-10">Bs</span><sub><span 
class="cmmi-7">i</span></sub> are of the same type (<span 
class="ectt-1000">_alpha </span>vs <span 
class="ectt-1000">_beta </span>etc)&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29071r65"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   let <span 
class="cmmi-10">As</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub> be the integer part of <span 
class="cmmi-10">As</span><sub><span 
class="cmmi-7">i</span></sub> if any, otherwise <span 
class="ectt-1000">0</span> <a 
 id="x1-29072r66"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   let <span 
class="cmmi-10">Bs</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub> be the integer part of <span 
class="cmmi-10">Bs</span><sub><span 
class="cmmi-7">i</span></sub> if any, otherwise <span 
class="ectt-1000">0</span> <a 
 id="x1-29073r67"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">As</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub> <span 
class="cmmi-10">&#x003E; Bs</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub>, using integer comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29074r68"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003E; B</span>
     </span><a 
 id="x1-29075r69"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">As</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub> <span 
class="cmmi-10">&#x003C; Bs</span><span 
class="cmsy-10">&prime;</span><sub><span 
class="cmmi-7">i</span></sub>, using integer comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29076r70"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003C; B</span>
     </span><a 
 id="x1-29077r71"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
   </span><a 
 id="x1-29078r72"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;the type of <span 
class="cmmi-10">As</span><sub><span 
class="cmmi-7">i</span></sub> is greater than the type of <span 
class="cmmi-10">Bs</span><sub><span 
class="cmmi-7">i</span></sub> using the ordering
   <span 
class="ectt-1000">_alpha</span> <span 
class="cmmi-10">&#x003C;</span> <span 
class="ectt-1000">_beta</span> <span 
class="cmmi-10">&#x003C;</span> <span 
class="ectt-1000">_pre</span> <span 
class="cmmi-10">&#x003C;</span> <span 
class="ectt-1000">_rc</span> <span 
class="cmmi-10">&#x003C;</span> <span 
class="ectt-1000">_p</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29079r73"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003E; B</span>
   </span><a 
 id="x1-29080r74"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">else</span><span class="else-body">
<a 
 id="x1-29081r75"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003C; B</span>
   </span><a 
 id="x1-29082r76"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
</div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="algorithm">
                                                                            
                                                                            
<!--l. 186--><p class="noindent" ><a 
 id="x1-29083r7"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Algorithm 7: </span><span  
class="content">Version comparison logic for revision components</span></div><!--tex4ht:label?: x1-29083r7 -->
<div class="algorithmic">
<a 
 id="x1-29084r77"></a>
 <span class="ALCitem"><span class="ecrm-0800">&#x2007;1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let <span 
class="cmmi-10">Ar </span>be the integer part of the revision component of <span 
class="cmmi-10">A </span>if any, otherwise <span 
class="ectt-1000">0</span> <a 
 id="x1-29085r78"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let <span 
class="cmmi-10">Br </span>be the integer part of the revision component of <span 
class="cmmi-10">B </span>if any, otherwise <span 
class="ectt-1000">0</span> <a 
 id="x1-29086r79"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">Ar &#x003E; Br </span>using integer comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29087r80"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003E; B</span>
   </span><a 
 id="x1-29088r81"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">Ar &#x003C; Br </span>using integer comparison&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-29089r82"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">return </span>&#x00A0;<span 
class="cmmi-10">A &#x003C; B</span>
   </span><a 
 id="x1-29090r83"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
</div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h3 class="sectionHead"><span class="titlemark">3.4   </span> <a 
 id="x1-300003.4"></a>Uniqueness of versions</h3>
<!--l. 200--><p class="noindent" >No two packages in a given repository may have the same qualified package name and equal
versions. For example, a repository may not contain more than one of <span 
class="ectt-1000">foo-bar/baz-1.0.2</span>,
<span 
class="ectt-1000">foo-bar/baz-1.0.2-r0 </span>and <span 
class="ectt-1000">foo-bar/baz-1.000.2</span>.
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;4</span><br /><a 
 id="x1-310004"></a>Tree Layout</h2>
<!--l. 3--><p class="noindent" >This chapter defines the layout on-disk of an ebuild repository. In all cases below where a file or
directory is specified, a symlink to a file or directory is also valid. In this case, the package manager
must follow the operating system&#8217;s semantics for symbolic links and must not behave differently
from normal.
</p>
<h3 class="sectionHead"><span class="titlemark">4.1   </span> <a 
 id="x1-320004.1"></a>Top Level</h3>
<!--l. 10--><p class="noindent" >An ebuild repository shall occupy one directory on disk, with the following subdirectories:
     </p><ul>
     <li class="compactitem">One directory per category, whose name shall be the name of the category. The layout
     of these directories shall be as described in section&#x00A0;<a 
href="#x1-330004.2">4.2<!--tex4ht:ref: sec:category-dirs --></a>.
     </li>
     <li class="compactitem">A <span 
class="ectt-1000">profiles </span>directory, described in section&#x00A0;<a 
href="#x1-350004.4">4.4<!--tex4ht:ref: sec:profiles-dir --></a>.
     </li>
     <li class="compactitem">A <span 
class="ectt-1000">licenses </span>directory (optional), described in section&#x00A0;<a 
href="#x1-400004.5">4.5<!--tex4ht:ref: sec:licenses-dir --></a>.
     </li>
     <li class="compactitem">An <span 
class="ectt-1000">eclass </span>directory (optional), described in section&#x00A0;<a 
href="#x1-410004.6">4.6<!--tex4ht:ref: sec:eclass-dir --></a>.
     </li>
     <li class="compactitem">A <span 
class="ectt-1000">metadata </span>directory (optional), described in section&#x00A0;<a 
href="#x1-420004.7">4.7<!--tex4ht:ref: sec:metadata-dir --></a>.
     </li>
     <li class="compactitem">Other  optional  support  files  and  directories  (skeleton  ebuilds  or  ChangeLogs,  for
     example) may exist but are not covered by this specification. The package manager
     must ignore any of these files or directories that it does not recognise.
     </li></ul>
<!--l. 24--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.2   </span> <a 
 id="x1-330004.2"></a>Category Directories</h3>
<!--l. 27--><p class="noindent" >Each category provided by the repository (see also: the <span 
class="ectt-1000">profiles/categories </span>file, section&#x00A0;<a 
href="#x1-350004.4">4.4<!--tex4ht:ref: profiles-categories --></a>)
shall be contained in one directory, whose name shall be that of the category. Each category
directory shall contain:
     </p><ul>
     <li class="compactitem">A <span 
class="ectt-1000">metadata.xml </span>file, as described in appendix&#x00A0;<a 
href="#x1-163000A">A<!--tex4ht:ref: sec:metadata-xml --></a>. Optional.
     </li>
     <li class="compactitem">Zero or more package directories, one for each package in the category, as described
     in section&#x00A0;<a 
href="#x1-340004.3">4.3<!--tex4ht:ref: sec:package-dirs --></a>. The name of the package directory shall be the corresponding package
     name.</li></ul>
<!--l. 38--><p class="noindent" >Category directories may contain additional files, whose purpose is not covered by this
specification. Additional directories that are not for a package may <span 
class="ecti-1000">not </span>be present, to avoid
conflicts with package name directories; an exception is made for filesystem components whose
name starts with a dot, which the package manager must ignore, and for any directory named
<span 
class="ectt-1000">CVS</span>.
</p><!--l. 43--><p class="noindent" >It is not required that a directory exists for each category provided by the repository. A category
directory that does not exist shall be considered equivalent to an empty category (and by
extension, a package manager may treat an empty category as a category that does not
exist).
                                                                            
                                                                            
</p><!--l. 47--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.3   </span> <a 
 id="x1-340004.3"></a>Package Directories</h3>
<!--l. 50--><p class="noindent" >A package directory contains the following:
     </p><ul>
     <li class="compactitem">Zero or more ebuilds. These are as described in section&#x00A0;<a 
href="#x1-620006">6<!--tex4ht:ref: sec:ebuild-format --></a> and others.
     </li>
     <li class="compactitem">A <span 
class="ectt-1000">metadata.xml </span>file, as described in appendix&#x00A0;<a 
href="#x1-163000A">A<!--tex4ht:ref: sec:metadata-xml --></a>. Optional only for legacy support.
     </li>
     <li class="compactitem">A <span 
class="ectt-1000">ChangeLog</span>, in a format determined by the provider of the repository. Optional.
     </li>
     <li class="compactitem">A <span 
class="ectt-1000">Manifest </span>file, whose format is described in <span class="cite">[<a 
href="#XGlep44">1</a>]</span>.
     </li>
     <li class="compactitem">A <span 
class="ectt-1000">files </span>directory, containing any support files needed by the ebuilds. Optional.</li></ul>
<!--l. 60--><p class="noindent" >Any ebuild in a package directory must be named <span 
class="ectt-1000">name-ver.suffix</span>, where:
</p><!--l. 63--><p class="noindent" >
     </p><ul>
     <li class="compactitem"><span 
class="ectt-1000">name </span>is the (unqualified) package name.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">ver </span>is the package&#8217;s version.
     </li>
     <li class="compactitem"> <span 
class="ectt-1000">suffix </span>is <span 
class="ectt-1000">ebuild</span>.</li></ul>
<!--l. 68--><p class="noindent" >Package managers must ignore any ebuild file that does not match these rules.
</p><!--l. 70--><p class="noindent" >A package directory that contains no correctly named ebuilds shall be considered a package with
no versions. A package with no versions shall be considered equivalent to a package that does not
exist (and by extension, a package manager may treat a package that does not exist as a package
with no versions).
</p><!--l. 75--><p class="noindent" >A package directory may contain other files or directories, whose purpose is not covered by this
specification.
</p><!--l. 78--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.4   </span> <a 
 id="x1-350004.4"></a>The Profiles Directory</h3>
<!--l. 81--><p class="noindent" >The profiles directory shall contain zero or more profile directories as described in section&#x00A0;<a 
href="#x1-440005">5<!--tex4ht:ref: sec:profiles --></a>, as
well as the following files and directories. In any line-based file, lines beginning with a # character
are treated as comments, whilst blank lines are ignored. All contents of this directory, with the
exception of <span 
class="ectt-1000">repo_name</span>, are optional.
</p><!--l. 88--><p class="noindent" >The profiles directory may contain an <span 
class="ectt-1000">eapi </span>file. This file, if it exists, must contain a single line
with the name of an EAPI. This specifies the EAPI to use when handling the profiles
directory; a package manager must not attempt to use any repository whose profile
directory requires an EAPI it does not support. If no <span 
class="ectt-1000">eapi </span>file is present, EAPI 0 shall be
used.
</p><!--l. 93--><p class="noindent" >If the repository is not intended to be stand-alone, the contents of these files are to be taken from
or merged with the master repository as necessary.
</p><!--l. 96--><p class="noindent" >Other files not described by this specification may exist, but may not be relied upon. The package
manager must ignore any files in this directory that it does not recognise.
                                                                            
                                                                            
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">arch.list</span> </dt><dd 
class="description"> Contains a list, one entry per line, of permissible values for the <span 
class="ectt-1000">ARCH </span>variable,
     and hence permissible keywords for packages in this repository.
     </dd><dt class="description">
<span 
class="ecbx-1000">categories</span> </dt><dd 
class="description"> Contains a list, one entry per line, of categories provided by this repository.
     </dd><dt class="description">
<span 
class="ecbx-1000">eapi</span> </dt><dd 
class="description">See above.
     </dd><dt class="description">
<span 
class="ecbx-1000">info_pkgs</span> </dt><dd 
class="description">Contains a list, one entry per line, of qualified package names. Any package
     matching one of these is to be listed when a package manager displays a &#8216;system
     information&#8217; listing.
     </dd><dt class="description">
<span 
class="ecbx-1000">info_vars</span> </dt><dd 
class="description">Contains a list, one entry per line, of profile, configuration, and environment
     variables which are considered to be of interest. The value of each of these variables
     may be shown when the package manager displays a &#8216;system information&#8217; listing.
     </dd><dt class="description">
<span 
class="ecbx-1000">package.mask</span> </dt><dd 
class="description"> Contains a list, one entry per line, of package dependency specifications
     (using the directory&#8217;s EAPI). Any package version matching one of these is considered
     to be masked, and will not be installed regardless of profile unless it is unmasked by
     the user configuration.
     </dd><dt class="description">
<span 
class="ecbx-1000">profiles.desc</span> </dt><dd 
class="description">Described below in section&#x00A0;<a 
href="#x1-360004.4.1">4.4.1<!--tex4ht:ref: sec:profiles.desc --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">repo_name</span> </dt><dd 
class="description">Contains, on a single line, the name of this repository. The repository name
     must conform to section&#x00A0;<a 
href="#x1-250003.1.5">3.1.5<!--tex4ht:ref: sec:repository-names --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">thirdpartymirrors</span> </dt><dd 
class="description">Described below in section&#x00A0;<a 
href="#x1-370004.4.2">4.4.2<!--tex4ht:ref: sec:thirdpartymirrors --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">use.desc</span> </dt><dd 
class="description">Contains descriptions of valid global USE flags for this repository. The format is
     described in section&#x00A0;<a 
href="#x1-380004.4.3">4.4.3<!--tex4ht:ref: sec:use.desc --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">use.local.desc</span> </dt><dd 
class="description">Contains descriptions of valid local USE flags for this repository, along with
     the packages to which they apply. The format is as described in section&#x00A0;<a 
href="#x1-380004.4.3">4.4.3<!--tex4ht:ref: sec:use.desc --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">desc/</span> </dt><dd 
class="description">This  directory  contains  files  analogous  to  <span 
class="ectt-1000">use.desc </span>for  the  various  <span 
class="ectt-1000">USE_EXPAND</span>
     variables. Each file in it is named <span 
class="ectt-1000">&#x003C;varname&#x003E;.desc</span>, where <span 
class="ectt-1000">&#x003C;varname&#x003E; </span>is the variable
     name, in lowercase, whose possible values the file describes. The format of each file is
     as for <span 
class="ectt-1000">use.desc</span>, described in section&#x00A0;<a 
href="#x1-380004.4.3">4.4.3<!--tex4ht:ref: sec:use.desc --></a>. The <span 
class="ectt-1000">USE_EXPAND </span>name is <span 
class="ecti-1000">not </span>included as
     a prefix here.
     </dd><dt class="description">
<span 
class="ecbx-1000">updates/</span> </dt><dd 
class="description">This directory is described in section&#x00A0;<a 
href="#x1-390004.4.4">4.4.4<!--tex4ht:ref: sec:updates-dir --></a>.</dd></dl>
<!--l. 131--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">4.4.1   </span> <a 
 id="x1-360004.4.1"></a>The profiles.desc file</h4>
<!--l. 133--><p class="noindent" ><span 
class="ectt-1000">profiles.desc </span>is a line-based file, with the standard commenting rules from section&#x00A0;<a 
href="#x1-350004.4">4.4<!--tex4ht:ref: sec:profiles-dir --></a>,
containing a list of profiles that are valid for use, along with their associated architecture and
status. Each line has the format:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-1">
&#x003C;keyword&#x003E;&#x00A0;&#x003C;profile&#x00A0;path&#x003E;&#x00A0;&#x003C;stability&#x003E;</div>
<!--l. 140--><p class="nopar" >
</p><!--l. 142--><p class="noindent" >Where:
</p><!--l. 145--><p class="noindent" >
     </p><ul>
     <li class="compactitem"><span 
class="ectt-1000">&#x003C;keyword&#x003E; </span>is the default keyword for the profile and the <span 
class="ectt-1000">ARCH </span>for which the profile is
     valid.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">&#x003C;profile path&#x003E; </span>is the (relative) path from the <span 
class="ectt-1000">profiles </span>directory to the profile in
     question.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">&#x003C;stability&#x003E; </span>indicates the stability of the profile. This may be useful for QA tools,
     which may wish to display warnings with a reduced severity for some profiles. The
     values <span 
class="ectt-1000">stable </span>and <span 
class="ectt-1000">dev </span>are widely used, but repositories may use other values.</li></ul>
<!--l. 154--><p class="noindent" >Fields are whitespace-delimited.
</p><!--l. 156--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">4.4.2   </span> <a 
 id="x1-370004.4.2"></a>The thirdpartymirrors file</h4>
<!--l. 158--><p class="noindent" ><span 
class="ectt-1000">thirdpartymirrors </span>is another simple line-based file, describing the valid mirrors for use with
<span 
class="ectt-1000">mirror:// </span>URIs in this repository, and the associated download locations. The format of each line
is:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-2">
&#x003C;mirror&#x00A0;name&#x003E;&#x00A0;&#x003C;mirror&#x00A0;1&#x003E;&#x00A0;&#x003C;mirror&#x00A0;2&#x003E;&#x00A0;...&#x00A0;&#x003C;mirror&#x00A0;n&#x003E;</div>
<!--l. 163--><p class="nopar" >Fields are whitespace-delimited. When parsing a URI of the form <span 
class="ectt-1000">mirror://name/path/filename</span>,
where the <span 
class="ectt-1000">path/ </span>part is optional, the <span 
class="ectt-1000">thirdpartymirrors </span>file is searched for a line whose first field
is <span 
class="ectt-1000">name</span>. Then the download URIs in the subsequent fields have <span 
class="ectt-1000">path/filename </span>appended to them
to generate the URIs from which a download is attempted.
</p><!--l. 170--><p class="noindent" >Each mirror name may appear at most once in a file. Behaviour when a mirror name appears
multiple times is undefined. Behaviour when a mirror is defined in terms of another mirror is
undefined. A package manager may choose to fetch from all of or a subset of the listed mirrors, and
may use an order other than the one described.
</p><!--l. 175--><p class="noindent" >The mirror with the name equal to the repository&#8217;s name (and if the repository has a master, the
master&#8217;s name) may be consulted for all downloads.
</p><!--l. 178--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">4.4.3   </span> <a 
 id="x1-380004.4.3"></a>use.desc and related files</h4>
<!--l. 180--><p class="noindent" ><span 
class="ectt-1000">use.desc </span>contains descriptions of every valid global USE flag for this repository. It is a
line-based file with the standard rules for comments and blank lines. The format of each line
is:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-3">
&#x003C;flagname&#x003E;&#x00A0;-&#x00A0;&#x003C;description&#x003E;</div>
<!--l. 184--><p class="nopar" >
</p><!--l. 186--><p class="noindent" ><span 
class="ectt-1000">use.local.desc </span>contains descriptions of every valid local USE flag&#8212;those that apply only to a
small number of packages, or that have different meanings for different packages. Its format
is:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-4">
&#x003C;category/package&#x003E;:&#x003C;flagname&#x003E;&#x00A0;-&#x00A0;&#x003C;description&#x003E;</div>
<!--l. 190--><p class="nopar" >Flags must be listed once for each package to which they apply, or if a flag is listed in both
<span 
class="ectt-1000">use.desc </span>and <span 
class="ectt-1000">use.local.desc</span>, it must be listed once for each package for which its meaning
differs from that described in <span 
class="ectt-1000">use.desc</span>.
</p><!--l. 195--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">4.4.4   </span> <a 
 id="x1-390004.4.4"></a>The updates directory</h4>
<!--l. 197--><p class="noindent" >The <span 
class="ectt-1000">updates </span>directory is used to inform the package manager that a package has moved
categories, names, or that a version has changed SLOT. It contains one file per quarter year,
named <span 
class="ectt-1000">[1-4]Q-[YYYY] </span>for the first to fourth quarter of a given year, for example <span 
class="ectt-1000">1Q-2004 </span>or
<span 
class="ectt-1000">3Q-2006</span>. The format of each file is again line-based, with each line having one of the following
formats:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-5">
move&#x00A0;&#x003C;qpn1&#x003E;&#x00A0;&#x003C;qpn2&#x003E;
&#x00A0;<br />slotmove&#x00A0;&#x003C;spec&#x003E;&#x00A0;&#x003C;slot1&#x003E;&#x00A0;&#x003C;slot2&#x003E;</div>
<!--l. 205--><p class="nopar" >The first form, where <span 
class="ectt-1000">qpn1 </span>and <span 
class="ectt-1000">qpn2 </span>are <span 
class="ecti-1000">qualified package names</span>, instructs the package
manager that the package <span 
class="ectt-1000">qpn1 </span>has changed name, category, or both, and is now called
<span 
class="ectt-1000">qpn2</span>.
</p><!--l. 209--><p class="noindent" >The second form instructs the package manager that any currently installed package version
matching package dependency specification <span 
class="ectt-1000">spec </span>whose <span 
class="ectt-1000">SLOT </span>is set to <span 
class="ectt-1000">slot1 </span>should have it
updated to <span 
class="ectt-1000">slot2</span>.
</p><!--l. 213--><p class="noindent" >Any name that has appeared as the origin of a move must not be reused in the future. Any slot
that has appeared as the origin of a slot move may not be used by packages matching the spec of
that slot move in the future.
</p><!--l. 217--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.5   </span> <a 
 id="x1-400004.5"></a>The Licenses Directory</h3>
<!--l. 220--><p class="noindent" >The <span 
class="ectt-1000">licenses </span>directory shall contain copies of the licenses used by packages in the repository.
Each file will be named according to the name used in the <span 
class="ectt-1000">LICENSE </span>variable as described in
section&#x00A0;<a 
href="#x1-670007.3">7.3<!--tex4ht:ref: ebuild-var-LICENSE --></a>, and will contain the complete text of the license in human-readable form. Plain text
format is strongly preferred but not required.
</p><!--l. 225--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.6   </span> <a 
 id="x1-410004.6"></a>The Eclass Directory</h3>
<!--l. 228--><p class="noindent" >The <span 
class="ectt-1000">eclass </span>directory shall contain copies of the eclasses provided by this repository. The format of
these files is described in section&#x00A0;<a 
href="#x1-11300010">10<!--tex4ht:ref: sec:eclasses --></a>. It may also contain, in their own directory, support files
needed by these eclasses.
</p><!--l. 232--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">4.7   </span> <a 
 id="x1-420004.7"></a>The Metadata Directory</h3>
<!--l. 235--><p class="noindent" >The <span 
class="ectt-1000">metadata </span>directory contains various repository-level metadata that is not contained in
<span 
class="ectt-1000">profiles/</span>. All contents are optional. In this standard only the <span 
class="ectt-1000">cache </span>subdirectory is described;
other contents are optional but may include security advisories, DTD files for the various XML
files used in the repository, and repository timestamps.
                                                                            
                                                                            
</p><!--l. 240--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">4.7.1   </span> <a 
 id="x1-430004.7.1"></a>The metadata cache</h4>
<!--l. 242--><p class="noindent" >The <span 
class="ectt-1000">metadata/cache </span>directory may contain a cached form of all important ebuild metadata
variables. The contents of this directory are described in section&#x00A0;<a 
href="#x1-15900013">13<!--tex4ht:ref: metadata-cache --></a>.
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;5</span><br /><a 
 id="x1-440005"></a>Profiles</h2>
<h3 class="sectionHead"><span class="titlemark">5.1   </span> <a 
 id="x1-450005.1"></a>General principles</h3>
<!--l. 5--><p class="noindent" >Generally, a profile defines information specific to a certain &#8216;type&#8217; of system&#8212;it lies somewhere
between repository-level defaults and user configuration in that the information it contains is not
necessarily applicable to all machines, but is sufficiently general that it should not be left to the
user to configure it. Some parts of the profile can be overridden by user configuration, some only by
another profile.
</p><!--l. 11--><p class="noindent" >The format of a profile is relatively simple. Each profile is a directory containing any number of the
files described in this chapter, and possibly inheriting another profile. The files themselves
follow a few basic conventions as regards inheritance and format; these are described in
the next section. It may also contain any number of subdirectories containing other
profiles.
</p><!--l. 16--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">5.2   </span> <a 
 id="x1-460005.2"></a>Files that make up a profile</h3>
<!--l. 18--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.1   </span> <a 
 id="x1-470005.2.1"></a>The parent file</h4>
<!--l. 19--><p class="noindent" >A profile may contain a <span 
class="ectt-1000">parent </span>file. Each line must contain a relative path to another profile which
will be considered as one of this profile&#8217;s parents. Any settings from the parent are inherited by
this profile, and can be overridden by it. Precise rules for how settings are combined with the
parent profile vary between files, and are described below. Parents are handled depth
first, left to right, with duplicate parent paths being sourced for every time they are
encountered.
</p><!--l. 25--><p class="noindent" >It is illegal for a profile&#8217;s parent tree to contain cycles. Package manager behaviour upon
encountering a cycle is undefined.
</p><!--l. 28--><p class="noindent" >This file must not contain comments, blank lines or make use of line continuations.
</p><!--l. 30--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.2   </span> <a 
 id="x1-480005.2.2"></a>The eapi file</h4>
<!--l. 32--><p class="noindent" >A profile directory may contain an <span 
class="ectt-1000">eapi </span>file. This file, if it exists, must contain a single line with
the name of an EAPI. This specifies the EAPI to use when handling the directory in question; a
package manager must not attempt to use any profile using a directory which requires an EAPI it
does not support. If no <span 
class="ectt-1000">eapi </span>file is present, EAPI 0 shall be used. The EAPI is not inherited via
the <span 
class="ectt-1000">parent </span>file.
                                                                            
                                                                            
</p><!--l. 38--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.3   </span> <a 
 id="x1-490005.2.3"></a>deprecated</h4>
<!--l. 39--><p class="noindent" >If a profile contains a file named <span 
class="ectt-1000">deprecated</span>, it is treated as such. The first line of this file
should contain the path from the <span 
class="ectt-1000">profiles </span>directory of the repository to a valid profile
that is the recommended upgrade path from this profile. The remainder of the file can
contain any text, which may be displayed to users using this profile by the package
manager. This file is not inherited&#8212;profiles which inherit from a deprecated profile are <span 
class="ecti-1000">not</span>
deprecated.
</p><!--l. 45--><p class="noindent" >This file must not contain comments or make use of line continuations.
</p><!--l. 47--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.4   </span> <a 
 id="x1-500005.2.4"></a>make.defaults</h4>
<!--l. 48--><p class="noindent" ><span 
class="ectt-1000">make.defaults </span>is used to define defaults for various environment and configuration variables. This
file is unusual in that it is not combined at a file level with the parent&#8212;instead, each variable is
combined or overridden individually as described in section&#x00A0;<a 
href="#x1-590005.3">5.3<!--tex4ht:ref: sec:profile-variables --></a>.
</p><!--l. 52--><p class="noindent" >The file itself is a line-based key-value format. Each line contains a single <span class="obeylines-h"><span class="verb"><span 
class="ectt-1000">VAR="value"</span></span></span> entry,
where the value must be double quoted. A variable name must start with one of <span 
class="ectt-1000">a-zA-Z </span>and may
contain <span 
class="ectt-1000">a-zA-Z0-9_ </span>only. Additional syntax, which is a small subset of bash syntax, is allowed as
follows:
</p><!--l. 58--><p class="noindent" >
     </p><ul>
     <li class="compactitem">Variables to the right of the equals sign in the form <span 
class="ectt-1000">${foo} </span>or <span 
class="ectt-1000">$foo </span>are recognised and
     expanded from variables previously set in this or earlier <span 
class="ectt-1000">make.defaults </span>files.
     </li>
     <li class="compactitem">One logical line may be continued over multiple physical lines by escaping the newline
     with a backslash. A quoted string may be continued over multiple physical lines by
     either a simple newline or a backslash-escaped newline.
     </li>
     <li class="compactitem">Backslashes, except for line continuations, are not allowed.</li></ul>
<!--l. 66--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.5   </span> <a 
 id="x1-510005.2.5"></a>Simple line-based files</h4>
<!--l. 68--><p class="noindent" >These files are a simple one-item-per-line list, which is inherited in the following manner: the
parent profile&#8217;s list is taken, and the current profile&#8217;s list appended. If any line begins with a
hyphen, then any lines previous to it whose contents are equal to the remainder of that line
are removed from the list. Once again, blank lines and those beginning with a # are
discarded.
</p><!--l. 73--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.6   </span> <a 
 id="x1-520005.2.6"></a>packages</h4>
                                                                            
                                                                            
<!--l. 74--><p class="noindent" >The <span 
class="ectt-1000">packages </span>file is used to define the &#8216;system set&#8217; for this profile. After the above rules for
inheritance and comments are applied, its lines must take one of two forms: a package dependency
specification prefixed by <span 
class="ectt-1000">* </span>denotes that the atom forms part of the system set. A package
dependency specification on its own may also appear for legacy reasons, but should be ignored
when calculating the system set.
</p><!--l. 80--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.7   </span> <a 
 id="x1-530005.2.7"></a>packages.build</h4>
<!--l. 81--><p class="noindent" >The <span 
class="ectt-1000">packages.build </span>file is used by Gentoo&#8217;s Catalyst tool to generate stage1 tarballs, and has no
relevance to the operation of a package manager. It is thus outside the scope of this document, but
is mentioned here for completeness.
</p><!--l. 85--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.8   </span> <a 
 id="x1-540005.2.8"></a>package.mask</h4>
<!--l. 86--><p class="noindent" ><span 
class="ectt-1000">package.mask </span>is used to prevent packages from being installed on a given profile. Each line
contains one package dependency specification; anything matching this specification will not be
installed unless unmasked by the user&#8217;s configuration.
</p><!--l. 90--><p class="noindent" >Note that the <span 
class="ectt-1000">-spec </span>syntax can be used to remove a mask in a parent profile, but not necessarily a
global mask (from <span 
class="ectt-1000">profiles/package.mask</span>, section&#x00A0;<a 
href="#x1-350004.4">4.4<!--tex4ht:ref: profiles-package.mask --></a>).
</p>
<!--l. 93--><p class="noindent" ><span class="paragraphHead"><a 
 id="x1-550005.2.8"></a><span 
class="ecbx-1000">Note:</span></span>
Portage currently treats <span 
class="ectt-1000">profiles/package.mask </span>as being on the leftmost branch of the inherit
tree when it comes to <span 
class="ectt-1000">-lines</span>. This behaviour may not be relied upon.
</p><!--l. 96--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.9   </span> <a 
 id="x1-560005.2.9"></a>package.provided</h4>
<!--l. 97--><p class="noindent" ><span 
class="ectt-1000">package.provided </span>is used to tell the package manager that a certain package version should be
considered to be provided by the system regardless of whether it is actually installed.
Because it has severe adverse effects on USE-based and slot-based dependencies, its
use is strongly deprecated and package manager support must be regarded as purely
optional.
</p><!--l. 102--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.10   </span> <a 
 id="x1-570005.2.10"></a>package.use</h4>
                                                                            
                                                                            
<!--l. 103--><p class="noindent" >The <span 
class="ectt-1000">package.use </span>file may be used by the package manager to override the default USE flags
specified by <span 
class="ectt-1000">make.defaults </span>on a per package basis. The format is to have a package
dependency specification, and then a space delimited list of USE flags to enable. A USE flag
in the form of <span 
class="ectt-1000">-flag </span>indicates that the package should have the USE flag disabled.
The package dependency specification is limited to the forms defined by the directory&#8217;s
EAPI.
</p><!--l. 109--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.2.11   </span> <a 
 id="x1-580005.2.11"></a>USE masking and forcing</h4>
<!--l. 111--><p class="noindent" >This section covers the eight files <span 
class="ectt-1000">use.mask</span>, <span 
class="ectt-1000">use.force</span>, <span 
class="ectt-1000">use.stable.mask</span>, <span 
class="ectt-1000">use.stable.force</span>,
<span 
class="ectt-1000">package.use.mask</span>, <span 
class="ectt-1000">package.use.force</span>, <span 
class="ectt-1000">package.use.stable.mask</span>, and <span 
class="ectt-1000">package.use.</span>
<span 
class="ectt-1000">stable.force</span>. They are described together because they interact in a non-trivial manner.
</p><!--l. 116--><p class="noindent" >Simply speaking, <span 
class="ectt-1000">use.mask </span>and <span 
class="ectt-1000">use.force </span>are used to say that a given USE flag must
never or always, respectively, be enabled when using this profile. <span 
class="ectt-1000">package.use.mask </span>and
<span 
class="ectt-1000">package.use.force </span>do the same thing on a per-package, or per-version, basis.
                                                                               </p><!--l. 121--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">T</span><span 
class="small-caps">A</span><span 
class="small-caps">B</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span><span 
class="small-caps">M</span><span 
class="small-caps">A</span><span 
class="small-caps">S</span><span 
class="small-caps">K</span></span></span></p><!--l. 121--><p class="noindent" >In profile directories with an EAPI supporting stable masking, as listed in table&#x00A0;<a 
href="#x1-58001r1">5.1<!--tex4ht:ref: tab:profile-stablemask --></a>, the same is
true for <span 
class="ectt-1000">use.stable.mask</span>, <span 
class="ectt-1000">use.stable.force</span>, <span 
class="ectt-1000">package.use.stable.mask </span>and <span 
class="ectt-1000">package.use.</span>
<span 
class="ectt-1000">stable.force</span>. These files, however, only act on packages that are merged due to a stable keyword
in the sense of subsection&#x00A0;<a 
href="#x1-690007.3.2">7.3.2<!--tex4ht:ref: sec:keywords --></a>. Thus, these files can be used to restrict the feature set deemed
stable in a package.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 130--><p class="noindent" ><a 
 id="x1-58001r1"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;5.1: </span><span  
class="content">Profile directory support for masking/forcing use flags in stable versions only</span></div><!--tex4ht:label?: x1-58001r1 -->
<div class="tabular">
 <table id="TBL-2" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-2-1g"><col 
id="TBL-2-1" /><col 
id="TBL-2-2" /><col 
id="TBL-2-3" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-2-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-2-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-2-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports masking/forcing use flags in stable versions?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-2-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-2-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-2-2-2"  
class="td11"> No                                                                                </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-2-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-2-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-2-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-2-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-2-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-2-4-2"  
class="td11"> No                                                                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-2-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-2-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-2-5-2"  
class="td11"> No                                                                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-2-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-2-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-2-6-2"  
class="td11"> No                                                                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-2-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-2-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-2-7-2"  
class="td11"> Yes                                                                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-2-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-2-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<!--l. 146--><p class="noindent" >The precise manner in which the eight files interact is less simple, and is best described in terms of
the algorithm used to determine whether a flag is masked for a given package version. This is
described in Algorithm&#x00A0;<a 
href="#x1-58002r8">8<!--tex4ht:ref: alg:use-masking --></a>. </p><div class="algorithm">
                                                                            
                                                                            
<!--l. 150--><p class="noindent" ><a 
 id="x1-58002r8"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Algorithm 8: </span><span  
class="content">USE masking logic</span></div><!--tex4ht:label?: x1-58002r8 -->
<div class="algorithmic">
<a 
 id="x1-58003r84"></a>
 <span class="ALCitem"><span class="ecrm-0800">&#x2007;1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let masked = false <a 
 id="x1-58004r85"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">for</span>&#x00A0;each profile in the inheritance tree, depth first&#x00A0;<span 
class="ecbx-1000">do</span><span class="for-body">
<a 
 id="x1-58005r86"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="ectt-1000">use.mask </span>contains <span 
class="ecti-1000">flag</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-58006r87"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     let masked = true
     </span><a 
 id="x1-58007r88"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="ectt-1000">use.mask </span>contains <span 
class="ecti-1000">-flag</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-58008r89"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     let masked = false
     </span><a 
 id="x1-58009r90"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span><a 
 id="x1-58010r91"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">if</span>&#x00A0;stable keyword in use&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-58011r92"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="ectt-1000">use.stable.mask </span>contains <span 
class="ecti-1000">flag</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-58012r93"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:34.99146pt;">&nbsp;</span>       let masked = true
       </span><a 
 id="x1-58013r94"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="ectt-1000">use.stable.mask </span>contains <span 
class="ecti-1000">-flag</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-58014r95"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:34.99146pt;">&nbsp;</span>       let masked = false
       </span><a 
 id="x1-58015r96"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
     </span><a 
 id="x1-58016r97"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span><a 
 id="x1-58017r98"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">15:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">for</span>&#x00A0;each <span 
class="cmmi-10">line </span>in package.use.mask, in order, for which the spec matches <span 
class="cmmi-10">package</span>&#x00A0;<span 
class="ecbx-1000">do</span><span class="for-body">
<a 
 id="x1-58018r99"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">16:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">line </span>contains <span 
class="ecti-1000">flag</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-58019r100"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">17:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:34.99146pt;">&nbsp;</span>       let masked = true
       </span><a 
 id="x1-58020r101"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">18:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">line </span>contains <span 
class="ecti-1000">-flag</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-58021r102"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">19:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:34.99146pt;">&nbsp;</span>       let masked = false
       </span><a 
 id="x1-58022r103"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">20:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
     </span><a 
 id="x1-58023r104"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">21:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">for</span><a 
 id="x1-58024r105"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">22:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">if</span>&#x00A0;stable keyword in use&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-58025r106"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">23:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">for</span>&#x00A0;each <span 
class="cmmi-10">line </span>in package.use.stable.mask, in order, for which the spec matches
       <span 
class="cmmi-10">package</span>&#x00A0;<span 
class="ecbx-1000">do</span><span class="for-body">
<a 
 id="x1-58026r107"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">24:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:34.99146pt;">&nbsp;</span>       <span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">line </span>contains <span 
class="ecti-1000">flag</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-58027r108"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">25:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:44.98901pt;">&nbsp;</span>         let masked = true
         </span><a 
 id="x1-58028r109"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">26:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:34.99146pt;">&nbsp;</span>       <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;<span 
class="cmmi-10">line </span>contains <span 
class="ecti-1000">-flag</span>&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-58029r110"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">27:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:44.98901pt;">&nbsp;</span>         let masked = false
         </span><a 
 id="x1-58030r111"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">28:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:34.99146pt;">&nbsp;</span>       <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
       </span><a 
 id="x1-58031r112"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">29:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">for</span>
                                                                            
                                                                            
     </span><a 
 id="x1-58032r113"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">30:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
   </span><a 
 id="x1-58033r114"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">31:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">for</span>
</div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<!--l. 186--><p class="noindent" >Stable restrictions (&#8220;stable keyword in use&#8221; in Algorithm&#x00A0;<a 
href="#x1-58002r8">8<!--tex4ht:ref: alg:use-masking --></a>) are applied exactly if replacing in
<span 
class="ectt-1000">KEYWORDS </span>all stable keywords by the corresponding tilde prefixed keywords (see subsection&#x00A0;<a 
href="#x1-690007.3.2">7.3.2<!--tex4ht:ref: sec:keywords --></a>)
would result in the package installation being prevented due to the <span 
class="ectt-1000">KEYWORDS </span>setting.
</p><!--l. 191--><p class="noindent" >The logic for <span 
class="ectt-1000">use.force</span>, <span 
class="ectt-1000">use.stable.force</span>, <span 
class="ectt-1000">package.use.force</span>, and <span 
class="ectt-1000">package.use.</span>
<span 
class="ectt-1000">stable.force </span>is identical. If a flag is both masked and forced, the mask is considered to take
precedence.
</p><!--l. 195--><p class="noindent" ><span 
class="ectt-1000">USE_EXPAND </span>values may be forced or masked by using <span 
class="ectt-1000">expand_name_value</span>.
</p><!--l. 197--><p class="noindent" >A package manager may treat <span 
class="ectt-1000">ARCH </span>values that are not the current architecture as being
masked.
</p>
<h3 class="sectionHead"><span class="titlemark">5.3   </span> <a 
 id="x1-590005.3"></a>Profile variables</h3>
<!--l. 4--><p class="noindent" >This section documents variables that have special meaning, or special behaviour, when defined in
a profile&#8217;s <span 
class="ectt-1000">make.defaults </span>file.
</p><!--l. 7--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">5.3.1   </span> <a 
 id="x1-600005.3.1"></a>Incremental Variables</h4>
<!--l. 8--><p class="noindent" ><span 
class="ecti-1000">Incremental </span>variables must stack between parent and child profiles in the following manner:
Beginning with the highest parent profile, tokenise the variable&#8217;s value based on whitespace and
concatenate the lists. Then, for any token <span 
class="cmmi-10">T </span>beginning with a hyphen, remove it and any previous
tokens whose value is equal to <span 
class="cmmi-10">T </span>with the hyphen removed, or, if <span 
class="cmmi-10">T </span>is equal to <span 
class="ectt-1000">-*</span>, remove all
previous values. Note that because of this treatment, the order of tokens in the final result is
arbitrary, not necessarily related to the order of tokens in any given profile. The following variables
must be treated in this fashion:
     </p><ul>
     <li class="compactitem"><span 
class="ectt-1000">USE</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">USE_EXPAND</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">USE_EXPAND_HIDDEN</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">CONFIG_PROTECT</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">CONFIG_PROTECT_MASK</span></li></ul>
<!--l. 23--><p class="noindent" >If the package manager supports any EAPI listed in table&#x00A0;<a 
href="#x1-60001r2">5.2<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as using profile-defined <span 
class="ectt-1000">IUSE</span>
injection, the following variables must also be treated incrementally; otherwise, the following
variables may or may not be treated incrementally:
     </p><ul>
     <li class="compactitem"><span 
class="ectt-1000">IUSE_IMPLICIT</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">USE_EXPAND_IMPLICIT</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">USE_EXPAND_UNPREFIXED</span></li></ul>
                                                                            
                                                                            
<!--l. 32--><p class="noindent" >Other variables, except where they affect only package-manager-specific functionality (such as
Portage&#8217;s <span 
class="ectt-1000">FEATURES </span>variable), must not be treated incrementally&#8212;later definitions shall completely
override those in parent profiles.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 37--><p class="noindent" ><a 
 id="x1-60001r2"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;5.2: </span><span  
class="content">Profile-defined <span 
class="ectt-1000">IUSE </span>injection for EAPIs</span></div><!--tex4ht:label?: x1-60001r2 -->
<div class="tabular">
 <table id="TBL-3" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-3-1g"><col 
id="TBL-3-1" /><col 
id="TBL-3-2" /><col 
id="TBL-3-3" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-3-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-3-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-3-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports profile-defined </span><span 
class="ectt-1000">IUSE </span><span 
class="ecbx-1000">injection?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-3-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-2-2"  
class="td11"> No                                                          </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-3-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-4-2"  
class="td11"> No                                                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-5-2"  
class="td11"> No                                                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-6-2"  
class="td11"> No                                                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-7-2"  
class="td11"> Yes                                                         </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">5.3.2   </span> <a 
 id="x1-610005.3.2"></a>Specific variables and their meanings</h4>
<!--l. 54--><p class="noindent" >The following variables have specific meanings when set in profiles.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">ARCH</span> </dt><dd 
class="description">The  system&#8217;s  architecture.  Must  be  a  value  listed  in  <span 
class="ectt-1000">profiles/arch.list</span>;  see
     section&#x00A0;<a 
href="#x1-350004.4">4.4<!--tex4ht:ref: arch.list --></a> for more information. Must be equal to the primary <span 
class="ectt-1000">KEYWORD </span>for this profile.
     </dd><dt class="description">
<span 
class="ecbx-1000">CONFIG_PROTECT, CONFIG_PROTECT_MASK</span> </dt><dd 
class="description">Contain
     whitespace-delimited lists used to control the configuration file protection. Described
     more fully in chapter&#x00A0;<a 
href="#x1-15400012.3.3">12.3.3<!--tex4ht:ref: sec:config-protect --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">USE</span> </dt><dd 
class="description">Defines the list of default USE flags for this profile. Flags may be added or removed
     by the user&#8217;s configuration. <span 
class="ectt-1000">USE_EXPAND </span>values must not be specified in this way.
     </dd><dt class="description">
<span 
class="ecbx-1000">USE_EXPAND</span> </dt><dd 
class="description">Defines a list of variables which are to be treated incrementally and
     whose contents are to be expanded into the USE variable as passed to ebuilds. See
     section&#x00A0;<a 
href="#x1-11900011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for details.
     </dd><dt class="description">
<span 
class="ecbx-1000">USE_EXPAND_UNPREFIXED</span> </dt><dd 
class="description">Similar  to  <span 
class="ectt-1000">USE_EXPAND</span>,  but  no  prefix  is  used.  If
     the repository contains any package using an EAPI supporting profile-defined <span 
class="ectt-1000">IUSE</span>
     injection (see table&#x00A0;<a 
href="#x1-60001r2">5.2<!--tex4ht:ref: tab:profile-iuse-injection-table --></a>), this list must contain at least <span 
class="ectt-1000">ARCH</span>. See section&#x00A0;<a 
href="#x1-11900011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for
     details.
     </dd><dt class="description">
<span 
class="ecbx-1000">USE_EXPAND_HIDDEN</span> </dt><dd 
class="description">Contains a (possibly empty) subset of names from <span 
class="ectt-1000">USE_</span>
     <span 
class="ectt-1000">EXPAND </span>and <span 
class="ectt-1000">USE_EXPAND_UNPREFIXED</span>. The package manager may use this set as a hint
     to avoid displaying uninteresting or unhelpful information to an end user.
     </dd><dt class="description">
<span 
class="ecbx-1000">USE_EXPAND_IMPLICIT, IUSE_IMPLICIT</span> </dt><dd 
class="description">Used to inject implicit values into
     <span 
class="ectt-1000">IUSE</span>. See section&#x00A0;<a 
href="#x1-11900011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for details.</dd></dl>
<!--l. 77--><p class="noindent" >In addition, for EAPIs listed in table&#x00A0;<a 
href="#x1-60001r2">5.2<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span 
class="ectt-1000">IUSE </span>injection, the variables
named in <span 
class="ectt-1000">USE_EXPAND </span>and <span 
class="ectt-1000">USE_EXPAND_UNPREFIXED </span>have special handling as described in
section&#x00A0;<a 
href="#x1-11900011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a>.
</p><!--l. 81--><p class="noindent" >Any other variables set in <span 
class="ectt-1000">make.defaults </span>must be passed on into the ebuild environment as-is,
and are not required to be interpreted by the package manager.
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;6</span><br /><a 
 id="x1-620006"></a>Ebuild File Format</h2>
<!--l. 4--><p class="noindent" >The ebuild file format is in its basic form a subset of the format of a bash script. The interpreter is
assumed to be GNU bash, version 3.2 or later, see footnote <a 
href="#x1-126001f5">5<!--tex4ht:ref: fn:bash3.2 --></a> on page <a 
href="#x1-126001f5">189<!--tex4ht:ref: fn:bash3.2 --></a>. The file encoding must
be UTF-8 with Unix-style newlines. When sourced, the ebuild must define certain variables and
functions (see sections&#x00A0;<a 
href="#x1-630007">7<!--tex4ht:ref: sec:ebuild-vars --></a> and <a 
href="#x1-930009">9<!--tex4ht:ref: sec:ebuild-functions --></a> for specific information), and must not call any external programs,
write anything to standard output or standard error, or modify the state of the system in any
way.
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;7</span><br /><a 
 id="x1-630007"></a>Ebuild-defined Variables</h2>
<!--l. 4--><p class="noindent" ><span class="paragraphHead"><a 
 id="x1-640007"></a><span 
class="ecbx-1000">Note:</span></span>
This section describes variables that may or must be defined by ebuilds. For variables that are
passed from the package manager to the ebuild, see section&#x00A0;<a 
href="#x1-11800011.1">11.1<!--tex4ht:ref: sec:ebuild-env-vars --></a>.
</p><!--l. 7--><p class="noindent" >If any of these variables are set to invalid values, or if any of the mandatory variables are
undefined, the package manager&#8217;s behaviour is undefined; ideally, an error in one ebuild should not
prevent operations upon other ebuilds or packages.
</p><!--l. 11--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">7.1   </span> <a 
 id="x1-650007.1"></a>Metadata invariance</h3>
<!--l. 14--><p class="noindent" >All ebuild-defined variables discussed in this chapter must be defined independently of any system,
profile or tree dependent data, and must not vary depending upon the ebuild phase. In particular,
ebuild metadata can and will be generated on a different system from that upon which the
ebuild will be used, and the ebuild must generate identical metadata every time it is
used.
</p><!--l. 20--><p class="noindent" >Globally defined ebuild variables without a special meaning must similarly not rely upon variable
data.
</p><!--l. 23--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">7.2   </span> <a 
 id="x1-660007.2"></a>Mandatory Ebuild-defined Variables</h3>
<!--l. 25--><p class="noindent" >All ebuilds must define at least the following variables:
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">DESCRIPTION</span> </dt><dd 
class="description">A short human-readable description of the package&#8217;s purpose. May be
     defined by an eclass. Must not be empty.
     </dd><dt class="description">
<span 
class="ecbx-1000">SLOT</span> </dt><dd 
class="description">The package&#8217;s slot. Must be a valid slot name, as per section&#x00A0;<a 
href="#x1-220003.1.3">3.1.3<!--tex4ht:ref: sec:slot-names --></a>. May be defined
     by an eclass. Must not be empty.
     <!--l. 33--><p class="noindent" >In EAPIs shown in table&#x00A0;<a 
href="#x1-83001r4">8.4<!--tex4ht:ref: tab:slot-deps-table --></a> as supporting sub-slots, the <span 
class="ectt-1000">SLOT </span>variable may contain
     an optional sub-slot part that follows the regular slot and is delimited by a <span 
class="ectt-1000">/ </span>character.
     The sub-slot must be a valid slot name, as per section&#x00A0;<a 
href="#x1-220003.1.3">3.1.3<!--tex4ht:ref: sec:slot-names --></a>. The sub-slot is used to
     represent cases in which an upgrade to a new version of a package with a different
     sub-slot may require dependent packages to be rebuilt. When the sub-slot part is
     omitted from the <span 
class="ectt-1000">SLOT </span>definition, the package is considered to have an implicit sub-slot
     which is equal to the regular slot.</p></dd></dl>
<!--l. 42--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">7.3   </span> <a 
 id="x1-670007.3"></a>Optional Ebuild-defined Variables</h3>
                                                                            
                                                                            
<!--l. 44--><p class="noindent" >Ebuilds may define any of the following variables:
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">EAPI</span> </dt><dd 
class="description">The EAPI. See below.
     </dd><dt class="description">
<span 
class="ecbx-1000">HOMEPAGE</span> </dt><dd 
class="description">The  URI  or  URIs  for  a  package&#8217;s  homepage,  including  protocols.  See
     section&#x00A0;<a 
href="#x1-740008">8<!--tex4ht:ref: sec:dependencies --></a> for full syntax.
     </dd><dt class="description">
<span 
class="ecbx-1000">SRC_URI</span> </dt><dd 
class="description">A list of source URIs for the package. Valid protocols are <span 
class="ectt-1000">http://</span>, <span 
class="ectt-1000">https://</span>,
     <span 
class="ectt-1000">ftp:// </span>and  <span 
class="ectt-1000">mirror:// </span>(see  section&#x00A0;<a 
href="#x1-370004.4.2">4.4.2<!--tex4ht:ref: sec:thirdpartymirrors --></a>  for  mirror  behaviour).  Fetch  restricted
     packages may include URL parts consisting of just a filename. See section&#x00A0;<a 
href="#x1-740008">8<!--tex4ht:ref: sec:dependencies --></a> for full
     syntax.
     </dd><dt class="description">
<span 
class="ecbx-1000">LICENSE</span> </dt><dd 
class="description">The package&#8217;s license. Each text token must correspond to a tree &#8220;licenses/&#8221;
     entry (see section&#x00A0;<a 
href="#x1-400004.5">4.5<!--tex4ht:ref: sec:licenses-dir --></a>). See section&#x00A0;<a 
href="#x1-740008">8<!--tex4ht:ref: sec:dependencies --></a> for full syntax.
     </dd><dt class="description">
<span 
class="ecbx-1000">KEYWORDS</span> </dt><dd 
class="description">A whitespace separated list of keywords for the ebuild. Each token must be
     a valid keyword name, as per section&#x00A0;<a 
href="#x1-260003.1.6">3.1.6<!--tex4ht:ref: sec:keyword-names --></a>. See section&#x00A0;<a 
href="#x1-690007.3.2">7.3.2<!--tex4ht:ref: sec:keywords --></a> for full syntax.
     </dd><dt class="description">
<span 
class="ecbx-1000">IUSE</span> </dt><dd 
class="description">The <span 
class="ectt-1000">USE </span>flags used by the ebuild. Any eclass that works with <span 
class="ectt-1000">USE </span>flags must also set
     <span 
class="ectt-1000">IUSE</span>, listing only the variables used by that eclass. The package manager is responsible
     for merging these values. See section&#x00A0;<a 
href="#x1-11900011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a> for discussion on which values must be
     listed this variable.
                                                                               <!--l. 65--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">I</span><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">U</span><span 
class="small-caps">L</span><span 
class="small-caps">T</span><span 
class="small-caps">S</span></span></span></p><!--l. 65--><p class="noindent" >In EAPIs shown in table&#x00A0;<a 
href="#x1-67001r1">7.1<!--tex4ht:ref: tab:iuse-defaults-table --></a> as supporting <span 
class="ectt-1000">IUSE </span>defaults, any use flag name in <span 
class="ectt-1000">IUSE</span>
     may be prefixed by at most one of a plus or a minus sign. If such a prefix is present,
     the package manager may use it as a suggestion as to the default value of the use flag
     if no other configuration overrides it.
     </p></dd><dt class="description">
<span 
class="ecbx-1000">REQUIRED_USE</span> </dt><dd 
class="description"> <!--l. 69--><p class="noindent" >
                                                                                  </p><!--l. 69--><p class="noindent" >
                                                                                  <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">Q</span><span 
class="small-caps">U</span><span 
class="small-caps">I</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">D</span>-<span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span></span></span> Zero or more assertions that must be met by the configuration of
     <span 
class="ectt-1000">USE </span>flags to be valid for this ebuild. See section&#x00A0;<a 
href="#x1-890008.2.7">8.2.7<!--tex4ht:ref: sec:required-use --></a> for description and section&#x00A0;<a 
href="#x1-740008">8<!--tex4ht:ref: sec:dependencies --></a> for
     full syntax. Only in EAPIs listed in table&#x00A0;<a 
href="#x1-67002r2">7.2<!--tex4ht:ref: tab:optional-vars-table --></a> as supporting <span 
class="ectt-1000">REQUIRED_USE</span>.
     </p></dd><dt class="description">
<span 
class="ecbx-1000">PROPERTIES</span> </dt><dd 
class="description"> <!--l. 73--><p class="noindent" >
                                                                                       </p><!--l. 73--><p class="noindent" >
                                                                                       <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">O</span><span 
class="small-caps">P</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span><span 
class="small-caps">T</span><span 
class="small-caps">I</span><span 
class="small-caps">E</span><span 
class="small-caps">S</span></span></span> Zero or more properties for this package. See section&#x00A0;<a 
href="#x1-910008.2.9">8.2.9<!--tex4ht:ref: sec:properties --></a> for value
     meanings and section&#x00A0;<a 
href="#x1-740008">8<!--tex4ht:ref: sec:dependencies --></a> for full syntax. For EAPIs listed in table&#x00A0;<a 
href="#x1-67002r2">7.2<!--tex4ht:ref: tab:optional-vars-table --></a> as having optional
     support, ebuilds must not rely upon the package manager recognising or understanding
     this variable in any way.
     </p></dd><dt class="description">
<span 
class="ecbx-1000">RESTRICT</span> </dt><dd 
class="description">Zero or more behaviour restrictions for this package. See section&#x00A0;<a 
href="#x1-900008.2.8">8.2.8<!--tex4ht:ref: sec:restrict --></a> for
     value meanings and section&#x00A0;<a 
href="#x1-740008">8<!--tex4ht:ref: sec:dependencies --></a> for full syntax.
     </dd><dt class="description">
<span 
class="ecbx-1000">DEPEND</span> </dt><dd 
class="description">See section&#x00A0;<a 
href="#x1-740008">8<!--tex4ht:ref: sec:dependencies --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">RDEPEND</span> </dt><dd 
class="description">See section&#x00A0;<a 
href="#x1-740008">8<!--tex4ht:ref: sec:dependencies --></a>. For some EAPIs, <span 
class="ectt-1000">RDEPEND </span>has special behaviour for its value if
     unset and when used with an eclass. See section&#x00A0;<a 
href="#x1-700007.3.3">7.3.3<!--tex4ht:ref: sec:rdepend-depend --></a> for details.
     </dd><dt class="description">
<span 
class="ecbx-1000">PDEPEND</span> </dt><dd 
class="description">See section&#x00A0;<a 
href="#x1-740008">8<!--tex4ht:ref: sec:dependencies --></a>.</dd></dl>
<div class="table">
                                                                            
                                                                            
<!--l. 88--><p class="noindent" ><a 
 id="x1-67001r1"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;7.1: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">IUSE </span>defaults</span></div><!--tex4ht:label?: x1-67001r1 -->
<div class="tabular">
 <table id="TBL-4" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-4-1g"><col 
id="TBL-4-1" /><col 
id="TBL-4-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-4-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-4-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-4-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">IUSE </span><span 
class="ecbx-1000">defaults?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-4-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-4-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-4-2-2"  
class="td11"> No                                  </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-4-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-4-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-4-3-2"  
class="td11"> Yes</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-4-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-4-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-4-4-2"  
class="td11"> Yes                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-4-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-4-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-4-5-2"  
class="td11"> Yes                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-4-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-4-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-4-6-2"  
class="td11"> Yes                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-4-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-4-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-4-7-2"  
class="td11"> Yes                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-4-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-4-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 105--><p class="noindent" ><a 
 id="x1-67002r2"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;7.2: </span><span  
class="content">EAPIs supporting various ebuild-defined variables</span></div><!--tex4ht:label?: x1-67002r2 -->
<div class="tabular">
 <table id="TBL-5" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-5-1g"><col 
id="TBL-5-1" /><col 
id="TBL-5-2" /><col 
id="TBL-5-3" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-5-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-5-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-5-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">PROPERTIES</span><span 
class="ecbx-1000">?</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-5-1-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">REQUIRED_USE</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-5-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-5-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-2-2"  
class="td11"> Optionally                    </td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-2-3"  
class="td11"> No                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-5-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-5-3-1"  
class="td11"> <span 
class="ectt-1000">1      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-3-2"  
class="td11"> Optionally                    </td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-3-3"  
class="td11"> No                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-5-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-5-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-4-2"  
class="td11"> Optionally                    </td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-4-3"  
class="td11"> No                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-5-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-5-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-5-2"  
class="td11"> Optionally                    </td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-5-3"  
class="td11"> No                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-5-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-5-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-6-2"  
class="td11"> Yes                             </td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-6-3"  
class="td11"> Yes                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-5-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-5-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-7-2"  
class="td11"> Yes                             </td><td  style="white-space:nowrap; text-align:left;" id="TBL-5-7-3"  
class="td11"> Yes                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-5-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-5-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">7.3.1   </span> <a 
 id="x1-680007.3.1"></a>EAPI</h4>
<!--l. 126--><p class="noindent" >An empty or unset <span 
class="ectt-1000">EAPI </span>value is equivalent to <span 
class="ectt-1000">0</span>. Ebuilds must not assume that they will get a
particular one of these two values if they are expecting one of these two values.
</p><!--l. 129--><p class="noindent" >The package manager must either pre-set the <span 
class="ectt-1000">EAPI </span>variable to <span 
class="ectt-1000">0 </span>or ensure that it is unset before
sourcing the ebuild for metadata generation. When using the ebuild for other purposes, the
package manager must either pre-set <span 
class="ectt-1000">EAPI </span>to the value specified by the ebuild&#8217;s metadata or ensure
that it is unset.
</p><!--l. 134--><p class="noindent" >If any of these variables are set to invalid values, the package manager&#8217;s behaviour is
undefined; ideally, an error in one ebuild should not prevent operations upon other ebuilds or
packages.
</p><!--l. 137--><p class="noindent" >If the EAPI is to be specified in an ebuild, the <span 
class="ectt-1000">EAPI </span>variable must be assigned to precisely once.
The assignment must not be preceded by any lines other than blank lines or those that start with
optional whitespace (spaces or tabs) followed by a <span 
class="ectt-1000"># </span>character, and the line containing the
assignment statement must match the following regular expression:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-6">
^[&#x00A0;\t]*EAPI=([&#8217;"]?)([A-Za-z0-9+_.-]*)\1[&#x00A0;\t]*([&#x00A0;\t]#.*)?$</div>
<!--l. 143--><p class="nopar" >
</p><!--l. 145--><p class="noindent" >The package manager must determine the EAPI of an ebuild by parsing its first non-blank and
non-comment line, using the above regular expression. If it matches, the EAPI is the substring
matched by the capturing parentheses (<span 
class="ectt-1000">0 </span>if empty), otherwise it is <span 
class="ectt-1000">0</span>. For a recognised EAPI, the
package manager must make sure that the <span 
class="ectt-1000">EAPI </span>value obtained by sourcing the ebuild with bash is
identical to the EAPI obtained by parsing. The ebuild must be treated as invalid if these values are
different.
</p><!--l. 152--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">7.3.2   </span> <a 
 id="x1-690007.3.2"></a>Keywords</h4>
<!--l. 155--><p class="noindent" >Keywords are used to indicate levels of stability of a package on a respective architecture <span 
class="ectt-1000">arch</span>.
The following conventions are used: </p>
     <ul class="itemize1">
     <li class="itemize"><span 
class="ectt-1000">arch</span>: Both the package version and the ebuild are widely tested, known to work and
     not have any serious issues on the indicated platform. This is referred to as a <span 
class="ecti-1000">stable</span>
     <span 
class="ecti-1000">keyword</span>.
     </li>
     <li class="itemize"><span 
class="ectt-1000">~arch</span>: The package version and the ebuild are believed to work and do not have
     any known serious bugs, but more testing is required before the package version is
     considered suitable for obtaining a stable keyword. This is referred to as an <span 
class="ecti-1000">unstable</span>
     <span 
class="ecti-1000">keyword </span>or a <span 
class="ecti-1000">testing keyword</span>.
     </li>
     <li class="itemize">No keyword: It is not known whether the package will work, or insufficient testing has
     occurred.
     </li>
     <li class="itemize"><span 
class="ectt-1000">-arch</span>: The package version will not work on the architecture.</li></ul>
<!--l. 168--><p class="noindent" >The <span 
class="ectt-1000">-* </span>keyword is used to indicate package versions which are not worth trying to test on unlisted
architectures.
</p><!--l. 171--><p class="noindent" >An empty <span 
class="ectt-1000">KEYWORDS </span>variable indicates uncertain functionality on any architecture.
</p><!--l. 173--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">7.3.3   </span> <a 
 id="x1-700007.3.3"></a><span 
class="ectt-1000">RDEPEND </span>value</h4>
                                                                               <!--l. 176--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">R</span><span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">E</span><span 
class="small-caps">N</span><span 
class="small-caps">D</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">E</span><span 
class="small-caps">N</span><span 
class="small-caps">D</span></span></span></p><!--l. 176--><p class="noindent" >In EAPIs listed in table&#x00A0;<a 
href="#x1-70001r3">7.3<!--tex4ht:ref: tab:rdepend-depend-table --></a> as having <span 
class="ectt-1000">RDEPEND=DEPEND</span>, if <span 
class="ectt-1000">RDEPEND </span>is unset (but not if it is set to
an empty string) in an ebuild, when generating metadata the package manager must treat its value
as being equal to the value of <span 
class="ectt-1000">DEPEND</span>.
</p><!--l. 181--><p class="noindent" >When dealing with eclasses, only values set in the ebuild itself are considered for this behaviour;
any <span 
class="ectt-1000">DEPEND </span>or <span 
class="ectt-1000">RDEPEND </span>set in an eclass does not change the implicit <span 
class="ectt-1000">RDEPEND=DEPEND </span>for the
ebuild portion, and any <span 
class="ectt-1000">DEPEND </span>value set in an eclass does not get treated as being part of
                                                                            
                                                                            
<span 
class="ectt-1000">RDEPEND</span>.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 187--><p class="noindent" ><a 
 id="x1-70001r3"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;7.3: </span><span  
class="content">EAPIs with <span 
class="ectt-1000">RDEPEND=DEPEND </span>Default</span></div><!--tex4ht:label?: x1-70001r3 -->
<div class="tabular">
 <table id="TBL-6" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-6-1g"><col 
id="TBL-6-1" /><col 
id="TBL-6-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-6-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-6-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-6-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">RDEPEND=DEPEND</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-6-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-6-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-6-2-2"  
class="td11"> Yes                     </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-6-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-6-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-6-3-2"  
class="td11"> Yes</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-6-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-6-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-6-4-2"  
class="td11"> Yes                     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-6-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-6-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-6-5-2"  
class="td11"> Yes                     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-6-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-6-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-6-6-2"  
class="td11"> No                      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-6-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-6-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-6-7-2"  
class="td11"> No                      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-6-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-6-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h3 class="sectionHead"><span class="titlemark">7.4   </span> <a 
 id="x1-710007.4"></a>Magic Ebuild-defined Variables</h3>
<!--l. 205--><p class="noindent" >The following variables must be defined by <span 
class="ectt-1000">inherit </span>(see section&#x00A0;<a 
href="#x1-11400010.1">10.1<!--tex4ht:ref: sec:inherit --></a>, and may be considered to be
part of the ebuild&#8217;s metadata:
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">ECLASS</span> </dt><dd 
class="description">The current eclass, or unset if there is no current eclass. This is handled magically
     by <span 
class="ectt-1000">inherit </span>and must not be modified manually.
     </dd><dt class="description">
<span 
class="ecbx-1000">INHERITED</span> </dt><dd 
class="description">List of inherited eclass names. Again, this is handled magically by <span 
class="ectt-1000">inherit</span>.</dd></dl>
<!--l. 214--><p class="noindent" ><span class="paragraphHead"><a 
 id="x1-720007.4"></a><span 
class="ecbx-1000">Note:</span></span>
Thus, by extension of section&#x00A0;<a 
href="#x1-650007.1">7.1<!--tex4ht:ref: sec:metadata-invariance --></a>, <span 
class="ectt-1000">inherit </span>may not be used conditionally, except upon constant
conditions.
</p><!--l. 217--><p class="noindent" >The following are special variables defined by the package manager for internal use and may or
may not be exported to the ebuild environment:
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">DEFINED_PHASES</span> </dt><dd 
class="description">  <!--l. 221--><p class="noindent" >
                                                                              </p><!--l. 221--><p class="noindent" >
                                                                              <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">E</span><span 
class="small-caps">D</span>-<span 
class="small-caps">P</span><span 
class="small-caps">H</span><span 
class="small-caps">A</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span><span 
class="small-caps">S</span></span></span> A space separated arbitrarily ordered list of phase names
     (e. g.&#x00A0;<span 
class="ectt-1000">configure setup unpack</span>) whose phase functions are defined by the ebuild or
     an eclass inherited by the ebuild. If no phase functions are defined, a single hyphen
     is used instead of an empty string. For EAPIs listed in table&#x00A0;<a 
href="#x1-73001r4">7.4<!--tex4ht:ref: tab:defined-phases-table --></a> as having optional
     <span 
class="ectt-1000">DEFINED_PHASES </span>support, package managers may not rely upon the metadata cache
     having this variable defined, and must treat an empty string as &#8220;this information is not
     available&#8221;.</p></dd></dl>
<!--l. 229--><p class="noindent" ><span class="paragraphHead"><a 
 id="x1-730007.4"></a><span 
class="ecbx-1000">Note:</span></span>
Thus, by extension of section&#x00A0;<a 
href="#x1-650007.1">7.1<!--tex4ht:ref: sec:metadata-invariance --></a>, phase functions must not be defined based upon any variant
condition.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 233--><p class="noindent" ><a 
 id="x1-73001r4"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;7.4: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">DEFINED_PHASES</span></span></div><!--tex4ht:label?: x1-73001r4 -->
<div class="tabular">
 <table id="TBL-7" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-7-1g"><col 
id="TBL-7-1" /><col 
id="TBL-7-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-7-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-7-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-7-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">DEFINED_PHASES</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-7-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-7-2-2"  
class="td11"> Optionally                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-3-1"  
class="td11"> <span 
class="ectt-1000">1      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-7-3-2"  
class="td11"> Optionally                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-7-4-2"  
class="td11"> Optionally                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-7-5-2"  
class="td11"> Optionally                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-7-6-2"  
class="td11"> Yes                                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-7-7-2"  
class="td11"> Yes                                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-7-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-7-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;8</span><br /><a 
 id="x1-740008"></a>Dependencies</h2>
<h3 class="sectionHead"><span class="titlemark">8.1   </span> <a 
 id="x1-750008.1"></a>Dependency Classes</h3>
<div class="table">
                                                                            
                                                                            
<!--l. 7--><p class="noindent" ><a 
 id="x1-75001r1"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;8.1: </span><span  
class="content">Dependency classes required to be satisfied for a particular phase function</span></div><!--tex4ht:label?: x1-75001r1 -->
<div class="tabular">
 <table id="TBL-8" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-8-1g"><col 
id="TBL-8-1" /><col 
id="TBL-8-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-8-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-8-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Phase function</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-8-1-2"  
class="td11">              <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Satisfied dependency classes</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-8-2-"><td  style="white-space:wrap; text-align:left;" id="TBL-8-2-1"  
class="td11"> <!--l. 13--><p class="noindent" ><span 
class="ectt-1000">pkg_pretend</span>,
  <span 
class="ectt-1000">pkg_</span>
 <span 
class="ectt-1000">setup</span>,  <span 
class="ectt-1000">pkg_info</span>,
  <span 
class="ectt-1000">pkg_nofetch</span>     </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-8-2-2"  
class="td11"> <!--l. 13--><p class="noindent" >None (ebuilds can rely only on the packages in the system set)    </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-8-3-"><td  style="white-space:wrap; text-align:left;" id="TBL-8-3-1"  
class="td11"> <!--l. 14--><p class="noindent" ><span 
class="ectt-1000">src_unpack</span>, <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">prepare</span>,      <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">configure</span>,   <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">compile</span>,
  <span 
class="ectt-1000">src_test</span>,
  <span 
class="ectt-1000">src_install</span>     </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-8-3-2"  
class="td11"> <!--l. 14--><p class="noindent" ><span 
class="ectt-1000">DEPEND</span>                                                </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-8-4-"><td  style="white-space:wrap; text-align:left;" id="TBL-8-4-1"  
class="td11"> <!--l. 15--><p class="noindent" ><span 
class="ectt-1000">pkg_preinst</span>,
  <span 
class="ectt-1000">pkg_postinst</span>,
  <span 
class="ectt-1000">pkg_prerm</span>,   <span 
class="ectt-1000">pkg_</span>
 <span 
class="ectt-1000">postrm</span>          </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-8-4-2"  
class="td11"> <!--l. 15--><p class="noindent" ><span 
class="ectt-1000">RDEPEND </span>(unless the particular dependency results in a circular
  dependency, in which case it may be installed later)                  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-8-5-"><td  style="white-space:wrap; text-align:left;" id="TBL-8-5-1"  
class="td11"> <!--l. 16--><p class="noindent" ><span 
class="ectt-1000">pkg_config</span>      </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-8-5-2"  
class="td11"> <!--l. 16--><p class="noindent" ><span 
class="ectt-1000">RDEPEND</span>, <span 
class="ectt-1000">PDEPEND</span>                                       </p></td>

</tr><tr  
 style="vertical-align:baseline;" id="TBL-8-6-"><td  style="white-space:wrap; text-align:left;" id="TBL-8-6-1"  
class="td11">                  </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<!--l. 21--><p class="noindent" >There are three classes of dependencies supported by ebuilds:
     </p><ul>
     <li class="compactitem">Build dependencies (<span 
class="ectt-1000">DEPEND</span>). These must be installed and usable before any of the
     ebuild <span 
class="ectt-1000">src_* </span>phase functions is executed. These may not be installed at all if a binary
     package is being merged.
     </li>
     <li class="compactitem">Runtime dependencies (<span 
class="ectt-1000">RDEPEND</span>). These must be installed and usable before the results
     of an ebuild merging are treated as usable.
     </li>
     <li class="compactitem">Post dependencies (<span 
class="ectt-1000">PDEPEND</span>). These must be installed at some point before the package
     manager finishes the batch of installs.</li></ul>
<!--l. 33--><p class="noindent" >Table&#x00A0;<a 
href="#x1-75001r1">8.1<!--tex4ht:ref: tab:phase-function-dependency-classes --></a> lists dependencies which must be satisfied before a particular phase function is
executed.
</p><!--l. 35--><p class="noindent" >In addition, <span 
class="ectt-1000">SRC_URI</span>, <span 
class="ectt-1000">HOMEPAGE</span>, <span 
class="ectt-1000">RESTRICT</span>, <span 
class="ectt-1000">PROPERTIES</span>, <span 
class="ectt-1000">LICENSE </span>and <span 
class="ectt-1000">REQUIRED_USE </span>use
dependency-style specifications to specify their values.
</p>
<h3 class="sectionHead"><span class="titlemark">8.2   </span> <a 
 id="x1-760008.2"></a>Dependency Specification Format</h3>
<!--l. 40--><p class="noindent" >The following elements are recognised in at least one class of specification. All elements
must be surrounded on both sides by whitespace, except at the start and end of the
string.
</p><!--l. 44--><p class="noindent" >
     </p><ul>
     <li class="compactitem">A package dependency specification. Permitted in <span 
class="ectt-1000">DEPEND</span>, <span 
class="ectt-1000">RDEPEND</span>, <span 
class="ectt-1000">PDEPEND</span>.
     </li>
     <li class="compactitem">A URI, in the form <span 
class="ectt-1000">proto://host/path</span>. Permitted in <span 
class="ectt-1000">SRC_URI </span>and <span 
class="ectt-1000">HOMEPAGE</span>. In
     EAPIs listed in table&#x00A0;<a 
href="#x1-76001r2">8.2<!--tex4ht:ref: tab:uri-arrows-table --></a> as supporting <span 
class="ectt-1000">SRC_URI </span>arrows, may optionally be followed
     by whitespace, then <span 
class="ectt-1000">-&#x003E;</span>, then whitespace, then a simple filename when in <span 
class="ectt-1000">SRC_URI</span>. For
     <span 
class="ectt-1000">SRC_URI </span>behaviour, see section&#x00A0;<a 
href="#x1-920008.2.10">8.2.10<!--tex4ht:ref: sec:src-uri-behaviour --></a>.
     </li>
     <li class="compactitem">A flat filename. Permitted in <span 
class="ectt-1000">SRC_URI</span>.
     </li>
     <li class="compactitem">A license name (e. g.&#x00A0;<span 
class="ectt-1000">GPL-2</span>). Permitted in <span 
class="ectt-1000">LICENSE</span>.
     </li>
     <li class="compactitem">A use flag name, optionally preceded by an exclamation mark. Permitted in <span 
class="ectt-1000">REQUIRED_</span>
     <span 
class="ectt-1000">USE</span>.
     </li>
     <li class="compactitem">A simple string. Permitted in <span 
class="ectt-1000">RESTRICT </span>and <span 
class="ectt-1000">PROPERTIES</span>.
     </li>
     <li class="compactitem">An  all-of  group,  which  consists  of  an  open  parenthesis,  followed  by  whitespace,
     followed by zero or more of (a dependency item of any kind followed by whitespace),
     followed by a close parenthesis. More formally: <span 
class="ectt-1000">all-of ::= &#8217;(&#8217; whitespace (item</span>
     <span 
class="ectt-1000">whitespace)* &#8217;)&#8217;</span>. Permitted in all specification style variables.
     </li>
     <li class="compactitem">An any-of group, which consists of the string <span 
class="ectt-1000">||</span>, followed by whitespace, followed
     by  an  open  parenthesis,  followed  by  whitespace,  followed  by  zero  or  more  of
     (a  dependency  item  of  any  kind  followed  by  whitespace),  followed  by  a  close
     parenthesis.  More  formally:  <span 
class="ectt-1000">any-of ::= &#8217;||&#8217; whitespace &#8217;(&#8217; whitespace (item</span>
     <span 
class="ectt-1000">whitespace)* &#8217;)&#8217;</span>. Permitted in <span 
class="ectt-1000">DEPEND</span>, <span 
class="ectt-1000">RDEPEND</span>, <span 
class="ectt-1000">PDEPEND</span>, <span 
class="ectt-1000">LICENSE</span>, <span 
class="ectt-1000">REQUIRED_USE</span>.
                                                                            
                                                                            
     </li>
     <li class="compactitem">An  exactly-one-of  group,  which  consists  of  the  string  <span 
class="ectt-1000">^^</span>,  followed  by  whitespace,
     followed  by  an  open  parenthesis,  followed  by  whitespace,  followed  by  zero  or
     more  of  (a  dependency  item  of  any  kind  followed  by  whitespace),  followed  by
     a  close  parenthesis.  More  formally:  <span 
class="ectt-1000">exactly-one-of ::= &#8217;^^&#8217; whitespace &#8217;(&#8217;</span>
     <span 
class="ectt-1000">whitespace (item whitespace)* &#8217;)&#8217;</span>. Permitted in <span 
class="ectt-1000">REQUIRED_USE</span>.
     </li>
     <li class="compactitem"> <!--l. 69--><p class="noindent" >
                                                                                                                    </p><!--l. 69--><p class="noindent" >
                                                                                                                    <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">A</span><span 
class="small-caps">T</span>-<span 
class="small-caps">M</span><span 
class="small-caps">O</span><span 
class="small-caps">S</span><span 
class="small-caps">T</span>-<span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">E</span>-<span 
class="small-caps">O</span><span 
class="small-caps">F</span></span></span> An at-most-one-of group, which consists of the string <span 
class="ectt-1000">??</span>, followed by whitespace,
     followed  by  an  open  parenthesis,  followed  by  whitespace,  followed  by  zero  or
     more  of  (a  dependency  item  of  any  kind  followed  by  whitespace),  followed  by
     a  close  parenthesis.  More  formally:  <span 
class="ectt-1000">exactly-one-of ::= &#8217;??&#8217; whitespace &#8217;(&#8217;</span>
     <span 
class="ectt-1000">whitespace (item whitespace)* &#8217;)&#8217;</span>. Permitted in <span 
class="ectt-1000">REQUIRED_USE </span>in EAPIs listed
     in table&#x00A0;<a 
href="#x1-76002r3">8.3<!--tex4ht:ref: tab:at-most-one-of-table --></a> as supporting <span 
class="ectt-1000">REQUIRED_USE ??</span>&#x00A0;groups.
     </p></li>
     <li class="compactitem">A   use-conditional   group,   which   consists   of   an   optional   exclamation   mark,
     followed   by   a   use   flag   name,   followed   by   a   question   mark,   followed   by
     whitespace,  followed  by  an  open  parenthesis,  followed  by  whitespace,  followed
     by  zero  or  more  of  (a  dependency  item  of  any  kind  followed  by  whitespace),
     followed   by   a   close   parenthesis.   More   formally:   <span 
class="ectt-1000">use-conditional ::= &#8217;!&#8217;?</span>
     <span 
class="ectt-1000">flag-name &#8217;?&#8217; whitespace &#8217;(&#8217; whitespace (item whitespace)* &#8217;)&#8217;</span>. Permitted
     in all specification style variables.</li></ul>
<!--l. 83--><p class="noindent" >In particular, note that whitespace is not optional.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 86--><p class="noindent" ><a 
 id="x1-76001r2"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;8.2: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">SRC_URI </span>arrows</span></div><!--tex4ht:label?: x1-76001r2 -->
<div class="tabular">
 <table id="TBL-9" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-9-1g"><col 
id="TBL-9-1" /><col 
id="TBL-9-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-9-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-9-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-9-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">SRC_URI </span><span 
class="ecbx-1000">arrows?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-9-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-2-2"  
class="td11"> No                                     </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-9-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-9-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-4-2"  
class="td11"> Yes                                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-9-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-5-2"  
class="td11"> Yes                                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-9-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-6-2"  
class="td11"> Yes                                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-9-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-9-7-2"  
class="td11"> Yes                                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-9-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-9-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 103--><p class="noindent" ><a 
 id="x1-76002r3"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;8.3: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">REQUIRED_USE ??</span>&#x00A0;groups</span></div><!--tex4ht:label?: x1-76002r3 -->
<div class="tabular">
 <table id="TBL-10" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-10-1g"><col 
id="TBL-10-1" /><col 
id="TBL-10-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-10-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-10-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-10-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">REQUIRED_USE ??</span><span 
class="ecbx-1000">&#x00A0;groups?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-10-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-10-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-10-2-2"  
class="td11"> No                                                  </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-10-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-10-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-10-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-10-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-10-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-10-4-2"  
class="td11"> No                                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-10-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-10-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-10-5-2"  
class="td11"> No                                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-10-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-10-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-10-6-2"  
class="td11"> No                                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-10-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-10-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-10-7-2"  
class="td11"> Yes                                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-10-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-10-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">8.2.1   </span> <a 
 id="x1-770008.2.1"></a>All-of Dependency Specifications</h4>
<!--l. 121--><p class="noindent" >In an all-of group, all of the child elements must be matched.
</p><!--l. 123--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">8.2.2   </span> <a 
 id="x1-780008.2.2"></a>Use-conditional Dependency Specifications</h4>
<!--l. 125--><p class="noindent" >In a use-conditional group, if the associated use flag is enabled (or disabled if it has an exclamation
mark prefix), all of the child elements must be matched.
</p><!--l. 128--><p class="noindent" >It is an error for a flag to be used if it is not included in <span 
class="ectt-1000">IUSE_EFFECTIVE </span>as described in
section&#x00A0;<a 
href="#x1-11900011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a>.
</p><!--l. 131--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">8.2.3   </span> <a 
 id="x1-790008.2.3"></a>Any-of Dependency Specifications</h4>
<!--l. 133--><p class="noindent" >Any use-conditional group that is an immediate child of an any-of group, if not enabled (disabled
for an exclamation mark prefixed use flag name), is not considered a member of the any-of group
for match purposes.
</p><!--l. 137--><p class="noindent" >In an any-of group, at least one immediate child element must be matched. A blocker
is considered to be matched if its associated package dependency specification is not
matched.
</p><!--l. 140--><p class="noindent" >An empty any-of group counts as being matched.
</p><!--l. 142--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">8.2.4   </span> <a 
 id="x1-800008.2.4"></a>Exactly-one-of Dependency Specifications</h4>
<!--l. 144--><p class="noindent" >Any use-conditional group that is an immediate child of an exactly-one-of group, if not enabled
(disabled for an exclamation mark prefixed use flag name), is not considered a member of the
exactly-one-of group for match purposes.
</p><!--l. 148--><p class="noindent" >In an exactly-one-of group, exactly one immediate child element must be matched.
</p><!--l. 150--><p class="noindent" >An empty exactly-one-of group counts as being matched.
</p><!--l. 152--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">8.2.5   </span> <a 
 id="x1-810008.2.5"></a>At-most-one-of Dependency Specifications</h4>
                                                                            
                                                                            
<!--l. 154--><p class="noindent" >Any use-conditional group that is an immediate child of an at-most-one-of group, if not enabled
(disabled for an exclamation mark prefixed use flag name), is not considered a member of the
at-most-one-of group for match purposes.
</p><!--l. 158--><p class="noindent" >In an at-most-one-of group, at most one immediate child element must be matched.
</p><!--l. 160--><p class="noindent" >An empty at-most-one-of group counts as being matched.
</p><!--l. 162--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">8.2.6   </span> <a 
 id="x1-820008.2.6"></a>Package Dependency Specifications</h4>
<!--l. 164--><p class="noindent" >A package dependency can be in one of the following base formats. A package manager must warn
or error on non-compliant input.
</p><!--l. 168--><p class="noindent" >
     </p><ul>
     <li class="compactitem">A simple <span 
class="ectt-1000">category/package </span>name.
     </li>
     <li class="compactitem">An                           operator,                           as                           described
     in section&#x00A0;<a 
href="#x1-840008.2.6.1">8.2.6.1<!--tex4ht:ref: sec:dep-operator --></a>, followed immediately by <span 
class="ectt-1000">category/package</span>, followed by a hyphen,
     followed by a version specification.</li></ul>
<!--l. 173--><p class="noindent" >In EAPIs shown in table&#x00A0;<a 
href="#x1-83001r4">8.4<!--tex4ht:ref: tab:slot-deps-table --></a> as supporting <span 
class="ectt-1000">SLOT </span>dependencies, either of the above formats may
additionally be suffixed by a <span 
class="ectt-1000">:slot </span>restriction, as described in section&#x00A0;<a 
href="#x1-860008.2.6.3">8.2.6.3<!--tex4ht:ref: sec:slot-dep --></a>. A package manager
must warn or error if slot dependencies are used with an EAPI not supporting <span 
class="ectt-1000">SLOT</span>
dependencies.
                                                                               </p><!--l. 178--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">S</span></span></span></p><!--l. 178--><p class="noindent" >In EAPIs shown in table&#x00A0;<a 
href="#x1-83002r5">8.5<!--tex4ht:ref: tab:use-deps-table --></a> as supporting 2-style or 4-style <span 
class="ectt-1000">USE </span>dependencies, a specification may
additionally be suffixed by at most one 2-style or 4-style <span 
class="ectt-1000">[use] </span>restriction, as described in
section&#x00A0;<a 
href="#x1-870008.2.6.4">8.2.6.4<!--tex4ht:ref: sec:use-dep --></a>. A package manager must warn or error if this feature is used with an EAPI not
supporting use dependencies.
</p>
<!--l. 183--><p class="noindent" ><span class="paragraphHead"><a 
 id="x1-830008.2.6"></a><span 
class="ecbx-1000">Note:</span></span>
Order is important. The slot restriction must come before use dependencies.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 186--><p class="noindent" ><a 
 id="x1-83001r4"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;8.4: </span><span  
class="content">Support for <span 
class="ectt-1000">SLOT </span>dependencies and sub-slots in EAPIs</span></div><!--tex4ht:label?: x1-83001r4 -->
<div class="tabular">
 <table id="TBL-11" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-11-1g"><col 
id="TBL-11-1" /><col 
id="TBL-11-2" /><col 
id="TBL-11-3" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-11-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-11-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-11-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">SLOT </span><span 
class="ecbx-1000">dependencies?</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-11-1-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports sub-slots?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-11-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-11-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-2-2"  
class="td11"> No                                          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-2-3"  
class="td11"> No                            </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-11-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-11-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-3-2"  
class="td11"> Named only </td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-3-3"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-11-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-11-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-4-2"  
class="td11"> Named only                              </td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-4-3"  
class="td11"> No                            </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-11-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-11-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-5-2"  
class="td11"> Named only                              </td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-5-3"  
class="td11"> No                            </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-11-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-11-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-6-2"  
class="td11"> Named only                              </td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-6-3"  
class="td11"> No                            </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-11-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-11-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-7-2"  
class="td11"> Named and operator                  </td><td  style="white-space:nowrap; text-align:left;" id="TBL-11-7-3"  
class="td11"> Yes                           </td>

</tr><tr  
 style="vertical-align:baseline;" id="TBL-11-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-11-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 205--><p class="noindent" ><a 
 id="x1-83002r5"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;8.5: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">USE </span>dependencies</span></div><!--tex4ht:label?: x1-83002r5 -->
<div class="tabular">
 <table id="TBL-12" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-12-1g"><col 
id="TBL-12-1" /><col 
id="TBL-12-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-12-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-12-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-12-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">USE </span><span 
class="ecbx-1000">dependencies?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-12-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-12-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-12-2-2"  
class="td11"> No                                        </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-12-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-12-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-12-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-12-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-12-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-12-4-2"  
class="td11"> 2-style                                   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-12-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-12-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-12-5-2"  
class="td11"> 2-style                                   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-12-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-12-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-12-6-2"  
class="td11"> 4-style                                   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-12-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-12-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-12-7-2"  
class="td11"> 4-style                                   </td>

</tr><tr  
 style="vertical-align:baseline;" id="TBL-12-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-12-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><span class="titlemark">8.2.6.1   </span> <a 
 id="x1-840008.2.6.1"></a>Operators</h5>
<!--l. 224--><p class="noindent" >The following operators are available:
     </p><dl class="description"><dt class="description">
<span 
class="ectt-1000">&#x003C;</span> </dt><dd 
class="description">Strictly less than the specified version.
     </dd><dt class="description">
<span 
class="ectt-1000">&#x003C;=</span> </dt><dd 
class="description">Less than or equal to the specified version.
     </dd><dt class="description">
<span 
class="ectt-1000">=</span> </dt><dd 
class="description">Exactly equal to the specified version. Special exception: if the version specified has an
     asterisk immediately following it, a string prefix comparison is used instead. When an
     asterisk is used, the specification must remain valid if the asterisk were removed. (An
     asterisk used with any other operator is illegal.)
     </dd><dt class="description">
<span 
class="ectt-1000">~</span> </dt><dd 
class="description">Equal to the specified version, except the revision part of the matching package may be
     greater than the revision part of the specified version (<span 
class="ectt-1000">-r0 </span>is assumed if no revision is
     explicitly stated).
     </dd><dt class="description">
<span 
class="ectt-1000">&#x003E;=</span> </dt><dd 
class="description">Greater than or equal to the specified version.
     </dd><dt class="description">
<span 
class="ectt-1000">&#x003E;</span> </dt><dd 
class="description">Strictly greater than the specified version.</dd></dl>
<!--l. 240--><p class="noindent" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">8.2.6.2   </span> <a 
 id="x1-850008.2.6.2"></a>Block Operator</h5>
<!--l. 242--><p class="noindent" >If the specification is prefixed with one or two exclamation marks, the named dependency is a
block rather than a requirement&#8212;that is to say, the specified package must not be installed, with
the following exceptions:
</p><!--l. 247--><p class="noindent" >
     </p><ul>
     <li class="compactitem">Blocks on a package provided exclusively by the ebuild do not count.
     </li>
     <li class="compactitem">Weak blocks on the package version of the ebuild itself do not count.</li></ul>
                                                                               <!--l. 251--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">B</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span><span 
class="small-caps">G</span>-<span 
class="small-caps">S</span><span 
class="small-caps">T</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">N</span><span 
class="small-caps">G</span><span 
class="small-caps">T</span><span 
class="small-caps">H</span></span></span></p><!--l. 251--><p class="noindent" >There are two strengths of block: weak and strong. A weak block may be ignored by the package
manager, so long as any blocked package will be uninstalled later on. A strong block must not be
ignored. The mapping from one or two exclamation marks to strength is described in
table&#x00A0;<a 
href="#x1-85001r6">8.6<!--tex4ht:ref: tab:bang-strength-table --></a>.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 257--><p class="noindent" ><a 
 id="x1-85001r6"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;8.6: </span><span  
class="content">Exclamation mark strengths for EAPIs</span></div><!--tex4ht:label?: x1-85001r6 -->
<div class="tabular">
 <table id="TBL-13" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-13-1g"><col 
id="TBL-13-1" /><col 
id="TBL-13-2" /><col 
id="TBL-13-3" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-13-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-13-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-13-1-2"  
class="td11">     <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">!</span></div>     </td><td  style="white-space:nowrap; text-align:center;" id="TBL-13-1-3"  
class="td11">    <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">!!</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-13-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-13-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-2-2"  
class="td11"> Unspecified  </td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-2-3"  
class="td11"> Forbidden  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-13-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-13-3-1"  
class="td11"> <span 
class="ectt-1000">1      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-3-2"  
class="td11"> Unspecified  </td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-3-3"  
class="td11"> Forbidden  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-13-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-13-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-4-2"  
class="td11"> Weak          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-4-3"  
class="td11"> Strong      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-13-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-13-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-5-2"  
class="td11"> Weak          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-5-3"  
class="td11"> Strong      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-13-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-13-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-6-2"  
class="td11"> Weak          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-6-3"  
class="td11"> Strong      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-13-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-13-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-7-2"  
class="td11"> Weak          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-13-7-3"  
class="td11"> Strong      </td>

</tr><tr  
 style="vertical-align:baseline;" id="TBL-13-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-13-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><span class="titlemark">8.2.6.3   </span> <a 
 id="x1-860008.2.6.3"></a>Slot Dependencies</h5>
                                                                               <!--l. 277--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">L</span><span 
class="small-caps">O</span><span 
class="small-caps">T</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">S</span></span></span></p><!--l. 277--><p class="noindent" >A named slot dependency consists of a colon followed by a slot name. A specification with a named
slot dependency matches only if the slot of the matched package is equal to the slot specified. If the
slot of the package to match cannot be determined (e. g.&#x00A0;because it is not a supported <span 
class="ectt-1000">EAPI</span>), the
match is treated as unsuccessful.
                                                                               </p><!--l. 282--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">U</span><span 
class="small-caps">B</span>-<span 
class="small-caps">S</span><span 
class="small-caps">L</span><span 
class="small-caps">O</span><span 
class="small-caps">T</span></span></span></p><!--l. 282--><p class="noindent" >In EAPIs shown in table&#x00A0;<a 
href="#x1-83001r4">8.4<!--tex4ht:ref: tab:slot-deps-table --></a> as supporting sub-slots, a slot dependency may contain an optional
sub-slot part that follows the regular slot and is delimited by a <span 
class="ectt-1000">/ </span>character.
                                                                               </p><!--l. 286--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">L</span><span 
class="small-caps">O</span><span 
class="small-caps">T</span>-<span 
class="small-caps">O</span><span 
class="small-caps">P</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span><span 
class="small-caps">A</span><span 
class="small-caps">T</span><span 
class="small-caps">O</span><span 
class="small-caps">R</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">S</span></span></span></p><!--l. 286--><p class="noindent" >An operator slot dependency consists of a colon followed by one of the following operators:
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">*</span> </dt><dd 
class="description">Indicates that any slot value is acceptable. In addition, for runtime dependencies, indicates
     that the package will not break if the matched package is uninstalled and replaced by
     a different matching package in a different slot.
     </dd><dt class="description">
<span 
class="ecbx-1000">=</span> </dt><dd 
class="description">Indicates that any slot value is acceptable. In addition, for runtime dependencies, indicates
     that the package will break unless a matching package with slot and sub-slot equal to
     the slot and sub-slot of the best installed version at the time the package was installed
     is available.
     </dd><dt class="description">
<span 
class="ecbx-1000">slot=</span> </dt><dd 
class="description">Indicates  that  only  a  specific  slot  value  is  acceptable,  and  otherwise  behaves
     identically to the plain equals slot operator.</dd></dl>
<!--l. 300--><p class="noindent" >To implement the equals slot operator, the package manager will need to store the slot/sub-slot
pair of the best installed version of the matching package. This syntax is only for package manager
use and must not be used by ebuilds. The package manager may do this by inserting the
appropriate slot/sub-slot pair between the colon and equals sign when saving the package&#8217;s
dependencies. The sub-slot part must not be omitted here (when the SLOT variable omits the
sub-slot part, the package is considered to have an implicit sub-slot which is equal to the regular
slot).
</p><!--l. 307--><p class="noindent" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">8.2.6.4   </span> <a 
 id="x1-870008.2.6.4"></a>2-Style and 4-Style Use Dependencies</h5>
<!--l. 310--><p class="noindent" >A 2-style or 4-style use dependency consists of one of the following:
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">[opt]</span> </dt><dd 
class="description">The flag must be enabled.
     </dd><dt class="description">
<span 
class="ecbx-1000">[opt=]</span> </dt><dd 
class="description">The flag must be enabled if the flag is enabled for the package with the dependency,
     or disabled otherwise.
     </dd><dt class="description">
<span 
class="ecbx-1000">[!opt=]</span> </dt><dd 
class="description">The flag must be disabled if the flag is enabled for the package with the dependency,
     or enabled otherwise.
                                                                            
                                                                            
     </dd><dt class="description">
<span 
class="ecbx-1000">[opt?]</span> </dt><dd 
class="description">The flag must be enabled if the flag is enabled for the package with the dependency.
     </dd><dt class="description">
<span 
class="ecbx-1000">[!opt?]</span> </dt><dd 
class="description">The  flag  must  be  disabled  if  the  use  flag  is  disabled  for  the  package  with  the
     dependency.
     </dd><dt class="description">
<span 
class="ecbx-1000">[-opt]</span> </dt><dd 
class="description">The flag must be disabled.</dd></dl>
<!--l. 325--><p class="noindent" >Multiple requirements may be combined using commas, e. g.&#x00A0;<span 
class="ectt-1000">[first,-second,third?]</span>.
</p><!--l. 327--><p class="noindent" >When multiple requirements are specified, all must match for a successful match.
                                                                               </p><!--l. 329--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">U</span><span 
class="small-caps">L</span><span 
class="small-caps">T</span><span 
class="small-caps">S</span></span></span></p><!--l. 329--><p class="noindent" >In a 4-style use dependency, the flag name may immediately be followed by a <span 
class="ecti-1000">default </span>specified by
either <span 
class="ectt-1000">(+) </span>or <span 
class="ectt-1000">(-)</span>. The former indicates that, when applying the use dependency to a
package that does not have the flag in question in <span 
class="ectt-1000">IUSE_REFERENCEABLE</span>, the package
manager shall behave as if the flag were present and enabled; the latter, present and
disabled.
</p><!--l. 335--><p class="noindent" >Unless a 4-style default is specified, it is an error for a use dependency to be applied to an ebuild
which does not have the flag in question in <span 
class="ectt-1000">IUSE_REFERENCEABLE</span>.
</p>
<!--l. 338--><p class="noindent" ><span class="paragraphHead"><a 
 id="x1-880008.2.6.4"></a><span 
class="ecbx-1000">Note:</span></span>
By extension of the above, a default that could reference an ebuild using an EAPI not supporting
profile <span 
class="ectt-1000">IUSE </span>injections cannot rely upon any particular behaviour for flags that would not have to
be part of <span 
class="ectt-1000">IUSE</span>.
</p><!--l. 342--><p class="noindent" >It is an error for an ebuild to use a conditional use dependency when that ebuild does not have the
flag in <span 
class="ectt-1000">IUSE_EFFECTIVE</span>.
</p><!--l. 345--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">8.2.7   </span> <a 
 id="x1-890008.2.7"></a>Use State Constraints</h4>
<!--l. 347--><p class="noindent" ><span 
class="ectt-1000">REQUIRED_USE </span>contains a list of assertions that must be met by the configuration of <span 
class="ectt-1000">USE </span>flags to be
valid for this ebuild. In order to be matched, a <span 
class="ectt-1000">USE </span>flag in a terminal element must be enabled (or
disabled if it has an exclamation mark prefix).
</p><!--l. 351--><p class="noindent" >If the package manager encounters a package version where <span 
class="ectt-1000">REQUIRED_USE </span>assertions are not
met, it must treat this package version as if it was masked. No phase functions must be
called.
</p><!--l. 354--><p class="noindent" >It is an error for a flag to be used if it is not included in <span 
class="ectt-1000">IUSE_EFFECTIVE</span>.
</p><!--l. 356--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">8.2.8   </span> <a 
 id="x1-900008.2.8"></a>Restrict</h4>
<!--l. 359--><p class="noindent" >The following tokens are permitted inside <span 
class="ectt-1000">RESTRICT</span>:
                                                                            
                                                                            
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">mirror</span> </dt><dd 
class="description">The package&#8217;s <span 
class="ectt-1000">SRC_URI </span>entries may not be mirrored, and mirrors should not be
     checked when fetching.
     </dd><dt class="description">
<span 
class="ecbx-1000">fetch</span> </dt><dd 
class="description">The package&#8217;s <span 
class="ectt-1000">SRC_URI </span>entries may not be downloaded automatically. If entries are
     not available, <span 
class="ectt-1000">pkg_nofetch </span>is called.
     </dd><dt class="description">
<span 
class="ecbx-1000">strip</span> </dt><dd 
class="description">No stripping of debug symbols from files to be installed may be performed.
     </dd><dt class="description">
<span 
class="ecbx-1000">userpriv</span> </dt><dd 
class="description">The package manager may not drop root privileges when building the package.
     </dd><dt class="description">
<span 
class="ecbx-1000">test</span> </dt><dd 
class="description">The <span 
class="ectt-1000">src_test </span>phase must not be run.
     </dd><dt class="description">
<span 
class="ecbx-1000">sandbox</span> </dt><dd 
class="description">The <span 
class="ectt-1000">sandbox </span>tool must not be used when building the package.</dd></dl>
<!--l. 372--><p class="noindent" >Package managers may recognise other tokens, but ebuilds may not rely upon them being
supported.
</p><!--l. 374--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">8.2.9   </span> <a 
 id="x1-910008.2.9"></a>Properties</h4>
<!--l. 377--><p class="noindent" >The following tokens are permitted inside <span 
class="ectt-1000">PROPERTIES</span>:
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">interactive</span> </dt><dd 
class="description">The package may require interaction with the user via the tty.</dd></dl>
<!--l. 383--><p class="noindent" >Ebuilds may not rely upon any token being supported.
</p><!--l. 385--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">8.2.10   </span> <a 
 id="x1-920008.2.10"></a>SRC_URI</h4>
<!--l. 388--><p class="noindent" >All filename components that are enabled (i. e.&#x00A0;not inside a use-conditional block that is not
matched) in <span 
class="ectt-1000">SRC_URI </span>must be available in the <span 
class="ectt-1000">DISTDIR </span>directory. In addition, these components
are used to make the <span 
class="ectt-1000">A </span>and <span 
class="ectt-1000">AA </span>variables.
</p><!--l. 392--><p class="noindent" >If a component contains a full URI with protocol, that download location must be used. Package
managers may also consult mirrors for their files.
</p><!--l. 395--><p class="noindent" >The special <span 
class="ectt-1000">mirror:// </span>protocol must be supported. See section&#x00A0;<a 
href="#x1-370004.4.2">4.4.2<!--tex4ht:ref: sec:thirdpartymirrors --></a> for mirror details.
</p><!--l. 398--><p class="noindent" >If a simple filename rather than a full URI is provided, the package manager can only use mirrors
to download the file.
</p><!--l. 401--><p class="noindent" >The <span 
class="ectt-1000">RESTRICT </span>metadata key can be used to impose additional restrictions upon downloading&#8212;see
section&#x00A0;<a 
href="#x1-900008.2.8">8.2.8<!--tex4ht:ref: sec:restrict --></a> for details.
                                                                               </p><!--l. 404--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">U</span><span 
class="small-caps">R</span><span 
class="small-caps">I</span>-<span 
class="small-caps">A</span><span 
class="small-caps">R</span><span 
class="small-caps">R</span><span 
class="small-caps">O</span><span 
class="small-caps">W</span><span 
class="small-caps">S</span></span></span></p><!--l. 404--><p class="noindent" >In EAPIs supporting arrows, if an arrow is used, the filename used when saving to <span 
class="ectt-1000">DISTDIR </span>shall
instead be the name on the right of the arrow. When consulting mirrors (except for those explicitly
listed on the left of the arrow, if <span 
class="ectt-1000">mirror:// </span>is used), the filename to the right of the arrow shall be
requested instead of the filename in the URI.
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;9</span><br /><a 
 id="x1-930009"></a>Ebuild-defined Functions</h2>
<h3 class="sectionHead"><span class="titlemark">9.1   </span> <a 
 id="x1-940009.1"></a>List of Functions</h3>
<!--l. 7--><p class="noindent" >The following is a list of functions that an ebuild, or eclass, may define, and which will be called by
the package manager as part of the build and/or install process. In all cases the package manager
must provide a default implementation of these functions; unless otherwise stated this must be a
no-op. Most functions must assume only that they have write access to the package&#8217;s working
directory (the <span 
class="ectt-1000">WORKDIR </span>environment variable; see section&#x00A0;<a 
href="#x1-118001r1">11.1<!--tex4ht:ref: env-var-WORKDIR --></a>), and the temporary directory
<span 
class="ectt-1000">T</span>; exceptions are noted below. All functions may assume that they have read access
to all system libraries, binaries and configuration files that are accessible to normal
users.
</p><!--l. 16--><p class="noindent" >The environment for functions run outside of the build sequence (that is, <span 
class="ectt-1000">pkg_config</span>, <span 
class="ectt-1000">pkg_info</span>,
<span 
class="ectt-1000">pkg_prerm </span>and <span 
class="ectt-1000">pkg_postrm</span>) must be the environment used for the build of the package, not the
current configuration.
</p><!--l. 20--><p class="noindent" >Ebuilds must not call nor assume the existence of any phase functions.
</p><!--l. 22--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.1.1   </span> <a 
 id="x1-950009.1.1"></a>Initial Working Directories</h4>
<!--l. 25--><p class="noindent" >Some functions may assume that their initial working directory is set to a particular location; these
are noted below. If no initial working directory is mandated, it may be set to anything and the
ebuild must not rely upon a particular location for it. The ebuild <span 
class="ecti-1000">may </span>assume that the initial
working directory for any phase is a trusted location that may only be written to by a privileged
user and group.
                                                                               </p><!--l. 31--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span>-<span 
class="small-caps">W</span><span 
class="small-caps">O</span><span 
class="small-caps">R</span><span 
class="small-caps">K</span><span 
class="small-caps">D</span><span 
class="small-caps">I</span><span 
class="small-caps">R</span>-<span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">L</span><span 
class="small-caps">L</span><span 
class="small-caps">B</span><span 
class="small-caps">A</span><span 
class="small-caps">C</span><span 
class="small-caps">K</span></span></span></p><!--l. 31--><p class="noindent" >Some functions are described as having an initial working directory of <span 
class="ectt-1000">S </span>with an error or fallback
to <span 
class="ectt-1000">WORKDIR</span>. For EAPIs listed in table&#x00A0;<a 
href="#x1-95001r1">9.1<!--tex4ht:ref: tab:s-fallback-table --></a> as having the fallback, this means that if <span 
class="ectt-1000">S </span>is not a
directory before the start of the phase function, the initial working directory shall be <span 
class="ectt-1000">WORKDIR</span>
instead. For EAPIs where it is a conditional error, if <span 
class="ectt-1000">S </span>is not a directory before the start of the
phase function, it is a fatal error, unless all of the following conditions are true, in which case the
fallback to <span 
class="ectt-1000">WORKDIR </span>is used:
</p><!--l. 40--><p class="noindent" >
     </p><ul>
     <li class="compactitem">The <span 
class="ectt-1000">A </span>variable contains no items.
     </li>
     <li class="compactitem">The phase function in question is not in <span 
class="ectt-1000">DEFINED_PHASES</span>.
     </li>
     <li class="compactitem">None of the phase functions <span 
class="ectt-1000">unpack</span>, <span 
class="ectt-1000">prepare</span>, <span 
class="ectt-1000">configure</span>, <span 
class="ectt-1000">compile </span>or <span 
class="ectt-1000">install</span>, if
     supported by the EAPI in question and occurring prior to the phase about to be
     executed, are in <span 
class="ectt-1000">DEFINED_PHASES</span>.</li></ul>
<div class="table">
                                                                            
                                                                            
<!--l. 48--><p class="noindent" ><a 
 id="x1-95001r1"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;9.1: </span><span  
class="content">EAPIs with <span 
class="ectt-1000">S </span>to <span 
class="ectt-1000">WORKDIR </span>fallbacks</span></div><!--tex4ht:label?: x1-95001r1 -->
<div class="tabular">
 <table id="TBL-14" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-14-1g"><col 
id="TBL-14-1" /><col 
id="TBL-14-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-14-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-14-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-14-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Fallback to </span><span 
class="ectt-1000">WORKDIR </span><span 
class="ecbx-1000">permitted?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-14-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-14-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-14-2-2"  
class="td11"> Always                                       </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-14-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-14-3-1"  
class="td11"> <span 
class="ectt-1000">1      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-14-3-2"  
class="td11"> Always                                       </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-14-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-14-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-14-4-2"  
class="td11"> Always                                       </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-14-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-14-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-14-5-2"  
class="td11"> Always                                       </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-14-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-14-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-14-6-2"  
class="td11"> Conditional error                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-14-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-14-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-14-7-2"  
class="td11"> Conditional error                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-14-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-14-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">9.1.2   </span> <a 
 id="x1-960009.1.2"></a>pkg_pretend</h4>
                                                                               <!--l. 67--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">P</span><span 
class="small-caps">K</span><span 
class="small-caps">G</span>-<span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">T</span><span 
class="small-caps">E</span><span 
class="small-caps">N</span><span 
class="small-caps">D</span></span></span></p><!--l. 67--><p class="noindent" >The <span 
class="ectt-1000">pkg_pretend </span>function is only called for EAPIs listed in table&#x00A0;<a 
href="#x1-96001r2">9.2<!--tex4ht:ref: tab:pkg-pretend-table --></a> as supporting
it.
</p><!--l. 70--><p class="noindent" >The <span 
class="ectt-1000">pkg_pretend </span>function may be used to carry out sanity checks early on in the install process.
For example, if an ebuild requires a particular kernel configuration, it may perform that check in
<span 
class="ectt-1000">pkg_pretend </span>and call <span 
class="ectt-1000">eerror </span>and then <span 
class="ectt-1000">die </span>with appropriate messages if the requirement is not
met.
</p><!--l. 75--><p class="noindent" ><span 
class="ectt-1000">pkg_pretend </span>is run separately from the main phase function sequence, and does not participate in
any kind of environment saving. There is no guarantee that any of an ebuild&#8217;s dependencies will be
met at this stage, and no guarantee that the system state will not have changed substantially
before the next phase is executed.
</p><!--l. 80--><p class="noindent" ><span 
class="ectt-1000">pkg_pretend </span>must not write to the filesystem.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 83--><p class="noindent" ><a 
 id="x1-96001r2"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;9.2: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">pkg_pretend</span></span></div><!--tex4ht:label?: x1-96001r2 -->
<div class="tabular">
 <table id="TBL-15" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-15-1g"><col 
id="TBL-15-1" /><col 
id="TBL-15-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-15-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-15-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-15-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">pkg_pretend</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-15-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-15-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-15-2-2"  
class="td11"> No                                </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-15-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-15-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-15-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-15-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-15-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-15-4-2"  
class="td11"> No                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-15-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-15-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-15-5-2"  
class="td11"> No                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-15-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-15-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-15-6-2"  
class="td11"> Yes                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-15-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-15-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-15-7-2"  
class="td11"> Yes                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-15-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-15-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">9.1.3   </span> <a 
 id="x1-970009.1.3"></a>pkg_setup</h4>
<!--l. 101--><p class="noindent" >The <span 
class="ectt-1000">pkg_setup </span>function sets up the ebuild&#8217;s environment for all following functions,
before the build process starts. Further, it checks whether any necessary prerequisites not
covered by the package manager, e. g.&#x00A0;that certain kernel configuration options are
fulfilled.
</p><!--l. 105--><p class="noindent" ><span 
class="ectt-1000">pkg_setup </span>must be run with full filesystem permissions, including the ability to add new users
and/or groups to the system.
</p><!--l. 108--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.1.4   </span> <a 
 id="x1-980009.1.4"></a>src_unpack</h4>
                                                                               <!--l. 111--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">U</span><span 
class="small-caps">N</span><span 
class="small-caps">P</span><span 
class="small-caps">A</span><span 
class="small-caps">C</span><span 
class="small-caps">K</span></span></span></p><!--l. 111--><p class="noindent" >The <span 
class="ectt-1000">src_unpack </span>function extracts all of the package&#8217;s sources. In EAPIs lacking <span 
class="ectt-1000">src_prepare</span>, it
may also apply patches and set up the package&#8217;s build system for further use.
</p><!--l. 115--><p class="noindent" >The initial working directory must be <span 
class="ectt-1000">WORKDIR</span>, and the default implementation used when the
ebuild lacks the <span 
class="ectt-1000">src_unpack </span>function shall behave as:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-7">
src_unpack()&#x00A0;{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-n&#x00A0;${A}&#x00A0;]];&#x00A0;then
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;unpack&#x00A0;${A}
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
&#x00A0;<br />}</div>
<!--l. 124--><p class="nopar" >
</p><!--l. 126--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.1.5   </span> <a 
 id="x1-990009.1.5"></a>src_prepare</h4>
                                                                               <!--l. 129--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">A</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span></span></span></p><!--l. 129--><p class="noindent" >The <span 
class="ectt-1000">src_prepare </span>function is only called for EAPIs listed in table&#x00A0;<a 
href="#x1-99001r3">9.3<!--tex4ht:ref: tab:src-prepare-table --></a> as supporting
it.
</p><!--l. 132--><p class="noindent" >The <span 
class="ectt-1000">src_prepare </span>function can be used for post-unpack source preparation. The default
implementation does nothing.
</p><!--l. 135--><p class="noindent" >The initial working directory is <span 
class="ectt-1000">S</span>, with an error or fallback to <span 
class="ectt-1000">WORKDIR </span>as discussed in
section&#x00A0;<a 
href="#x1-950009.1.1">9.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 139--><p class="noindent" ><a 
 id="x1-99001r3"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;9.3: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">src_prepare</span></span></div><!--tex4ht:label?: x1-99001r3 -->
<div class="tabular">
 <table id="TBL-16" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-16-1g"><col 
id="TBL-16-1" /><col 
id="TBL-16-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-16-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-16-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-16-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">src_prepare</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-16-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-16-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-16-2-2"  
class="td11"> No                                </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-16-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-16-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-16-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-16-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-16-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-16-4-2"  
class="td11"> Yes                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-16-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-16-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-16-5-2"  
class="td11"> Yes                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-16-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-16-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-16-6-2"  
class="td11"> Yes                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-16-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-16-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-16-7-2"  
class="td11"> Yes                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-16-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-16-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">9.1.6   </span> <a 
 id="x1-1000009.1.6"></a>src_configure</h4>
                                                                               <!--l. 158--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">F</span><span 
class="small-caps">I</span><span 
class="small-caps">G</span><span 
class="small-caps">U</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span></span></span></p><!--l. 158--><p class="noindent" >The <span 
class="ectt-1000">src_configure </span>function is only called for EAPIs listed in table&#x00A0;<a 
href="#x1-100001r4">9.4<!--tex4ht:ref: tab:src-configure-table --></a> as supporting
it.
</p><!--l. 161--><p class="noindent" >The initial working directory is <span 
class="ectt-1000">S</span>, with an error or fallback to <span 
class="ectt-1000">WORKDIR </span>as discussed in
section&#x00A0;<a 
href="#x1-950009.1.1">9.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
</p><!--l. 164--><p class="noindent" >The <span 
class="ectt-1000">src_configure </span>function configures the package&#8217;s build environment. The default
implementation used when the ebuild lacks the <span 
class="ectt-1000">src_configure </span>function shall behave
as:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-8">
src_configure()&#x00A0;{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-x&#x00A0;${ECONF_SOURCE:-.}/configure&#x00A0;]];&#x00A0;then
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;econf
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
&#x00A0;<br />}</div>
<!--l. 173--><p class="nopar" >
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 176--><p class="noindent" ><a 
 id="x1-100001r4"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;9.4: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">src_configure</span></span></div><!--tex4ht:label?: x1-100001r4 -->
<div class="tabular">
 <table id="TBL-17" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-17-1g"><col 
id="TBL-17-1" /><col 
id="TBL-17-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-17-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-17-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-17-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">src_configure</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-17-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-17-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-17-2-2"  
class="td11"> No                                   </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-17-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-17-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-17-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-17-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-17-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-17-4-2"  
class="td11"> Yes                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-17-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-17-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-17-5-2"  
class="td11"> Yes                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-17-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-17-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-17-6-2"  
class="td11"> Yes                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-17-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-17-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-17-7-2"  
class="td11"> Yes                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-17-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-17-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">9.1.7   </span> <a 
 id="x1-1010009.1.7"></a>src_compile</h4>
                                                                               <!--l. 195--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">P</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span></span></span></p><!--l. 195--><p class="noindent" >The <span 
class="ectt-1000">src_compile </span>function configures the package&#8217;s build environment in EAPIs lacking
<span 
class="ectt-1000">src_configure</span>, and builds the package in all EAPIs.
</p><!--l. 198--><p class="noindent" >The initial working directory is <span 
class="ectt-1000">S</span>, with an error or fallback to <span 
class="ectt-1000">WORKDIR </span>as discussed in
section&#x00A0;<a 
href="#x1-950009.1.1">9.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
                                                                               </p><!--l. 201--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">P</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span>-0</span></span></p><!--l. 201--><p class="noindent" >For EAPIs listed in table&#x00A0;<a 
href="#x1-101001r5">9.5<!--tex4ht:ref: tab:src-compile-table --></a> as using format 0, the default implementation used when the ebuild
lacks the <span 
class="ectt-1000">src_compile </span>function shall behave as:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-9">
src_compile()&#x00A0;{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-x&#x00A0;./configure&#x00A0;]];&#x00A0;then
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;econf
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-f&#x00A0;Makefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;GNUmakefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;makefile&#x00A0;]];&#x00A0;then
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;||&#x00A0;die&#x00A0;"emake&#x00A0;failed"
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
&#x00A0;<br />}</div>
<!--l. 214--><p class="nopar" >
                                                                               </p><!--l. 216--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">P</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span>-1</span></span></p><!--l. 216--><p class="noindent" >For EAPIs listed in table&#x00A0;<a 
href="#x1-101001r5">9.5<!--tex4ht:ref: tab:src-compile-table --></a> as using format 1, the default implementation used when the ebuild
lacks the <span 
class="ectt-1000">src_compile </span>function shall behave as:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-10">
src_compile()&#x00A0;{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-x&#x00A0;${ECONF_SOURCE:-.}/configure&#x00A0;]];&#x00A0;then
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;econf
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-f&#x00A0;Makefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;GNUmakefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;makefile&#x00A0;]];&#x00A0;then
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;||&#x00A0;die&#x00A0;"emake&#x00A0;failed"
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
&#x00A0;<br />}</div>
<!--l. 229--><p class="nopar" >
                                                                               </p><!--l. 231--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">P</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span>-2</span></span></p><!--l. 231--><p class="noindent" >For EAPIs listed in table&#x00A0;<a 
href="#x1-101001r5">9.5<!--tex4ht:ref: tab:src-compile-table --></a> as using format 2, the default implementation used when the ebuild
lacks the <span 
class="ectt-1000">src_compile </span>function shall behave as:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-11">
src_compile()&#x00A0;{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-f&#x00A0;Makefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;GNUmakefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;makefile&#x00A0;]];&#x00A0;then
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;||&#x00A0;die&#x00A0;"emake&#x00A0;failed"
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
&#x00A0;<br />}</div>
<!--l. 241--><p class="nopar" >
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 244--><p class="noindent" ><a 
 id="x1-101001r5"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;9.5: </span><span  
class="content"><span 
class="ectt-1000">src_compile </span>behaviour for EAPIs</span></div><!--tex4ht:label?: x1-101001r5 -->
<div class="tabular">
 <table id="TBL-18" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-18-1g"><col 
id="TBL-18-1" /><col 
id="TBL-18-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-18-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-18-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-18-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Format</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-18-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-18-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-18-2-2"  
class="td11"> 0           </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-18-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-18-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-18-3-2"  
class="td11"> 1</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-18-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-18-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-18-4-2"  
class="td11"> 2           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-18-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-18-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-18-5-2"  
class="td11"> 2           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-18-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-18-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-18-6-2"  
class="td11"> 2           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-18-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-18-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-18-7-2"  
class="td11"> 2           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-18-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-18-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">9.1.8   </span> <a 
 id="x1-1020009.1.8"></a>src_test</h4>
<!--l. 263--><p class="noindent" >The <span 
class="ectt-1000">src_test </span>function runs unit tests for the newly built but not yet installed package as
provided.
</p><!--l. 266--><p class="noindent" >The initial working directory must be <span 
class="ectt-1000">S </span>if that exists, falling back to <span 
class="ectt-1000">WORKDIR </span>otherwise. The
default implementation used when the ebuild lacks the <span 
class="ectt-1000">src_test </span>function must, if tests are
enabled, run <span 
class="ectt-1000">emake check </span>if and only if such a target is available, or if not run <span 
class="ectt-1000">emake test </span>if and
only if such a target is available. In both cases, if <span 
class="ectt-1000">emake </span>returns non-zero the build must be
aborted.
                                                                               </p><!--l. 272--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">P</span><span 
class="small-caps">A</span><span 
class="small-caps">R</span><span 
class="small-caps">A</span><span 
class="small-caps">L</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span><span 
class="small-caps">L</span>-<span 
class="small-caps">T</span><span 
class="small-caps">E</span><span 
class="small-caps">S</span><span 
class="small-caps">T</span><span 
class="small-caps">S</span></span></span></p><!--l. 272--><p class="noindent" >For EAPIs listed in table&#x00A0;<a 
href="#x1-102001r6">9.6<!--tex4ht:ref: tab:src-test-table --></a> as not supporting parallel tests, the <span 
class="ectt-1000">emake </span>command must be called
with option <span 
class="ectt-1000">-j1</span>.
</p><!--l. 275--><p class="noindent" >The <span 
class="ectt-1000">src_test </span>function may be disabled by <span 
class="ectt-1000">RESTRICT</span>. See section&#x00A0;<a 
href="#x1-900008.2.8">8.2.8<!--tex4ht:ref: sec:restrict --></a>. It may be disabled by
user too, using a PM-specific mechanism.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 279--><p class="noindent" ><a 
 id="x1-102001r6"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;9.6: </span><span  
class="content"><span 
class="ectt-1000">src_test </span>behaviour for EAPIs</span></div><!--tex4ht:label?: x1-102001r6 -->
<div class="tabular">
 <table id="TBL-19" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-19-1g"><col 
id="TBL-19-1" /><col 
id="TBL-19-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-19-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-19-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-19-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports parallel tests?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-19-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-19-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-19-2-2"  
class="td11"> No                                  </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-19-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-19-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-19-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-19-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-19-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-19-4-2"  
class="td11"> No                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-19-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-19-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-19-5-2"  
class="td11"> No                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-19-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-19-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-19-6-2"  
class="td11"> No                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-19-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-19-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-19-7-2"  
class="td11"> Yes                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-19-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-19-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">9.1.9   </span> <a 
 id="x1-1030009.1.9"></a>src_install</h4>
                                                                               <!--l. 298--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span><span 
class="small-caps">T</span><span 
class="small-caps">A</span><span 
class="small-caps">L</span><span 
class="small-caps">L</span></span></span></p><!--l. 298--><p class="noindent" >The <span 
class="ectt-1000">src_install </span>function installs the package&#8217;s content to a directory specified in
<span 
class="ectt-1000">D</span>.
</p><!--l. 301--><p class="noindent" >The initial working directory is <span 
class="ectt-1000">S</span>, with an error or fallback to <span 
class="ectt-1000">WORKDIR </span>as discussed in
section&#x00A0;<a 
href="#x1-950009.1.1">9.1.1<!--tex4ht:ref: sec:s-to-workdir-fallback --></a>.
                                                                               </p><!--l. 304--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span><span 
class="small-caps">T</span><span 
class="small-caps">A</span><span 
class="small-caps">L</span><span 
class="small-caps">L</span>-4</span></span></p><!--l. 304--><p class="noindent" >For EAPIs listed in table&#x00A0;<a 
href="#x1-103001r7">9.7<!--tex4ht:ref: tab:src-install-table --></a> as using format 4, the default implementation used when the ebuild
lacks the <span 
class="ectt-1000">src_install </span>function shall behave as:
                                                                            
                                                                            
</p>
<div class="verbatim" id="verbatim-12">
src_install()&#x00A0;{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;[[&#x00A0;-f&#x00A0;Makefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;GNUmakefile&#x00A0;]]&#x00A0;||&#x00A0;[[&#x00A0;-f&#x00A0;makefile&#x00A0;]];&#x00A0;then
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;DESTDIR="${D}"&#x00A0;install
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
&#x00A0;<br />
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;if&#x00A0;!&#x00A0;declare&#x00A0;-p&#x00A0;DOCS&#x00A0;&#x003E;/dev/null&#x00A0;2&#x003E;&amp;1&#x00A0;;&#x00A0;then
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;local&#x00A0;d
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;for&#x00A0;d&#x00A0;in&#x00A0;README*&#x00A0;ChangeLog&#x00A0;AUTHORS&#x00A0;NEWS&#x00A0;TODO&#x00A0;CHANGES&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;THANKS&#x00A0;BUGS&#x00A0;FAQ&#x00A0;CREDITS&#x00A0;CHANGELOG&#x00A0;;&#x00A0;do
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;[[&#x00A0;-s&#x00A0;"${d}"&#x00A0;]]&#x00A0;&amp;&amp;&#x00A0;dodoc&#x00A0;"${d}"
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;done
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;elif&#x00A0;declare&#x00A0;-p&#x00A0;DOCS&#x00A0;|&#x00A0;grep&#x00A0;-q&#x00A0;&#8217;^declare&#x00A0;-a&#x00A0;&#8217;&#x00A0;;&#x00A0;then
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;dodoc&#x00A0;"${DOCS[@]}"
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;else
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;dodoc&#x00A0;${DOCS}
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;fi
&#x00A0;<br />}</div>
<!--l. 326--><p class="nopar" >
</p><!--l. 328--><p class="noindent" >For other EAPIs, the default implementation used when the ebuild lacks the <span 
class="ectt-1000">src_install </span>function
is a no-op.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 332--><p class="noindent" ><a 
 id="x1-103001r7"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;9.7: </span><span  
class="content"><span 
class="ectt-1000">src_install </span>behaviour for EAPIs</span></div><!--tex4ht:label?: x1-103001r7 -->
<div class="tabular">
 <table id="TBL-20" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-20-1g"><col 
id="TBL-20-1" /><col 
id="TBL-20-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-20-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-20-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-20-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Format</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-20-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-20-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-20-2-2"  
class="td11"> no-op     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-20-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-20-3-1"  
class="td11"> <span 
class="ectt-1000">1      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-20-3-2"  
class="td11"> no-op     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-20-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-20-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-20-4-2"  
class="td11"> no-op     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-20-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-20-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-20-5-2"  
class="td11"> no-op     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-20-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-20-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-20-6-2"  
class="td11"> 4           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-20-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-20-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-20-7-2"  
class="td11"> 4           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-20-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-20-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">9.1.10   </span> <a 
 id="x1-1040009.1.10"></a>pkg_preinst</h4>
<!--l. 351--><p class="noindent" >The <span 
class="ectt-1000">pkg_preinst </span>function performs any special tasks that are required immediately before
merging the package to the live filesystem. It must not write outside of the directories specified by
the <span 
class="ectt-1000">ROOT </span>and <span 
class="ectt-1000">D </span>environment variables.
</p><!--l. 355--><p class="noindent" ><span 
class="ectt-1000">pkg_preinst </span>must be run with full access to all files and directories below that specified by the
<span 
class="ectt-1000">ROOT </span>and <span 
class="ectt-1000">D </span>environment variables.
</p><!--l. 358--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.1.11   </span> <a 
 id="x1-1050009.1.11"></a>pkg_postinst</h4>
<!--l. 361--><p class="noindent" >The <span 
class="ectt-1000">pkg_postinst </span>function performs any special tasks that are required immediately after
merging the package to the live filesystem. It must not write outside of the directory specified in
the <span 
class="ectt-1000">ROOT </span>environment variable.
</p><!--l. 365--><p class="noindent" ><span 
class="ectt-1000">pkg_postinst</span>, like, <span 
class="ectt-1000">pkg_preinst</span>, must be run with full access to all files and directories below
that specified by the <span 
class="ectt-1000">ROOT </span>environment variable.
</p><!--l. 368--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.1.12   </span> <a 
 id="x1-1060009.1.12"></a>pkg_prerm</h4>
<!--l. 371--><p class="noindent" >The <span 
class="ectt-1000">pkg_prerm </span>function performs any special tasks that are required immediately before
unmerging the package from the live filesystem. It must not write outside of the directory specified
by the <span 
class="ectt-1000">ROOT </span>environment variable.
</p><!--l. 375--><p class="noindent" ><span 
class="ectt-1000">pkg_prerm </span>must be run with full access to all files and directories below that specified by the <span 
class="ectt-1000">ROOT</span>
environment variable.
</p><!--l. 378--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.1.13   </span> <a 
 id="x1-1070009.1.13"></a>pkg_postrm</h4>
<!--l. 381--><p class="noindent" >The <span 
class="ectt-1000">pkg_postrm </span>function performs any special tasks that are required immediately after
unmerging the package from the live filesystem. It must not write outside of the directory specified
by the <span 
class="ectt-1000">ROOT </span>environment variable.
</p><!--l. 385--><p class="noindent" ><span 
class="ectt-1000">pkg_postrm </span>must be run with full access to all files and directories below that specified by the
<span 
class="ectt-1000">ROOT </span>environment variable.
                                                                            
                                                                            
</p><!--l. 388--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.1.14   </span> <a 
 id="x1-1080009.1.14"></a>pkg_config</h4>
<!--l. 391--><p class="noindent" >The <span 
class="ectt-1000">pkg_config </span>function performs any custom steps required to configure a package after it has
been fully installed. It is the only ebuild function which may be interactive and prompt for user
input.
</p><!--l. 394--><p class="noindent" ><span 
class="ectt-1000">pkg_config </span>must be run with full access to all files and directories inside of <span 
class="ectt-1000">ROOT</span>.
</p><!--l. 396--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.1.15   </span> <a 
 id="x1-1090009.1.15"></a>pkg_info</h4>
                                                                               <!--l. 399--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">P</span><span 
class="small-caps">K</span><span 
class="small-caps">G</span>-<span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">F</span><span 
class="small-caps">O</span></span></span></p><!--l. 399--><p class="noindent" >The <span 
class="ectt-1000">pkg_info </span>function may be called by the package manager when displaying information about
an installed package. In EAPIs listed in table&#x00A0;<a 
href="#x1-109001r8">9.8<!--tex4ht:ref: tab:pkg-info-table --></a> as supporting <span 
class="ectt-1000">pkg_info </span>on non-installed
packages, it may also be called by the package manager when displaying information about a
non-installed package. In this case, ebuild authors should note that dependencies may not be
installed.
</p><!--l. 405--><p class="noindent" ><span 
class="ectt-1000">pkg_info </span>must not write to the filesystem.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 408--><p class="noindent" ><a 
 id="x1-109001r8"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;9.8: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">pkg_info </span>on non-installed packages</span></div><!--tex4ht:label?: x1-109001r8 -->
<div class="tabular">
 <table id="TBL-21" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-21-1g"><col 
id="TBL-21-1" /><col 
id="TBL-21-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-21-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-21-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-21-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">pkg_info </span><span 
class="ecbx-1000">on non-installed packages?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-21-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-21-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-21-2-2"  
class="td11"> No                                                                   </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-21-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-21-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-21-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-21-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-21-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-21-4-2"  
class="td11"> No                                                                   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-21-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-21-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-21-5-2"  
class="td11"> No                                                                   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-21-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-21-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-21-6-2"  
class="td11"> Yes                                                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-21-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-21-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-21-7-2"  
class="td11"> Yes                                                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-21-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-21-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">9.1.16   </span> <a 
 id="x1-1100009.1.16"></a>pkg_nofetch</h4>
<!--l. 427--><p class="noindent" >The <span 
class="ectt-1000">pkg_nofetch </span>function is run when the fetch phase of an fetch-restricted ebuild is run,
and the relevant source files are not available. It should direct the user to download all
relevant source files from their respective locations, with notes concerning licensing if
applicable.
</p><!--l. 431--><p class="noindent" ><span 
class="ectt-1000">pkg_nofetch </span>must require no write access to any part of the filesystem.
</p><!--l. 433--><p class="noindent" >
</p>
<h4 class="subsectionHead"><span class="titlemark">9.1.17   </span> <a 
 id="x1-1110009.1.17"></a><span 
class="ectt-1000">default_ </span>Phase Functions</h4>
                                                                               <!--l. 436--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">U</span><span 
class="small-caps">L</span><span 
class="small-caps">T</span>-<span 
class="small-caps">P</span><span 
class="small-caps">H</span><span 
class="small-caps">A</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">F</span><span 
class="small-caps">U</span><span 
class="small-caps">N</span><span 
class="small-caps">C</span><span 
class="small-caps">S</span></span></span></p><!--l. 436--><p class="noindent" >In EAPIs listed in table&#x00A0;<a 
href="#x1-111001r9">9.9<!--tex4ht:ref: tab:default-phase-function-table --></a> as supporting <span 
class="ectt-1000">default_ </span>phase functions, a function named
<span 
class="ectt-1000">default_</span>(phase) that behaves as the default implementation for that EAPI shall be defined when
executing any ebuild phase listed in the table. Ebuilds must not call these functions except when in
the phase in question.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 443--><p class="noindent" ><a 
 id="x1-111001r9"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;9.9: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">default_ </span>phase functions</span></div><!--tex4ht:label?: x1-111001r9 -->
<div class="tabular">
 <table id="TBL-22" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-22-1g"><col 
id="TBL-22-1" /><col 
id="TBL-22-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-22-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-22-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-22-1-2"  
class="td11">            <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">default_ </span><span 
class="ecbx-1000">functions in phases</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-22-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-22-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-22-2-2"  
class="td11"> <!--l. 449--><p class="noindent" >None                                                                                     </p></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-22-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-22-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-22-3-2"  
class="td11"> <!--l. 450--><p class="noindent" >None</p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-22-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-22-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-22-4-2"  
class="td11"> <!--l. 451--><p class="noindent" ><span 
class="ectt-1000">pkg_nofetch</span>,
  <span 
class="ectt-1000">src_unpack</span>,
  <span 
class="ectt-1000">src_prepare</span>,
  <span 
class="ectt-1000">src_configure</span>,
  <span 
class="ectt-1000">src_compile</span>,
  <span 
class="ectt-1000">src_test</span>                                                  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-22-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-22-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-22-5-2"  
class="td11"> <!--l. 453--><p class="noindent" ><span 
class="ectt-1000">pkg_nofetch</span>,
  <span 
class="ectt-1000">src_unpack</span>,
  <span 
class="ectt-1000">src_prepare</span>,
  <span 
class="ectt-1000">src_configure</span>,
  <span 
class="ectt-1000">src_compile</span>,
  <span 
class="ectt-1000">src_test</span>                                                  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-22-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-22-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-22-6-2"  
class="td11"> <!--l. 455--><p class="noindent" ><span 
class="ectt-1000">pkg_nofetch</span>,
  <span 
class="ectt-1000">src_unpack</span>,
  <span 
class="ectt-1000">src_prepare</span>,
  <span 
class="ectt-1000">src_configure</span>,
  <span 
class="ectt-1000">src_compile</span>,
  <span 
class="ectt-1000">src_install</span>,
  <span 
class="ectt-1000">src_test</span>                                                  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-22-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-22-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-22-7-2"  
class="td11"> <!--l. 457--><p class="noindent" ><span 
class="ectt-1000">pkg_nofetch</span>,
  <span 
class="ectt-1000">src_unpack</span>,
  <span 
class="ectt-1000">src_prepare</span>,
  <span 
class="ectt-1000">src_configure</span>,
  <span 
class="ectt-1000">src_compile</span>,
  <span 
class="ectt-1000">src_install</span>,
  <span 
class="ectt-1000">src_test</span>                                                  </p></td>

</tr><tr  
 style="vertical-align:baseline;" id="TBL-22-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-22-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h3 class="sectionHead"><span class="titlemark">9.2   </span> <a 
 id="x1-1120009.2"></a>Call Order</h3>
<!--l. 465--><p class="noindent" >The call order for installing a package is:
</p><!--l. 468--><p class="noindent" >
     </p><ul>
     <li class="compactitem"><span 
class="ectt-1000">pkg_pretend </span>(only for EAPIs listed in table&#x00A0;<a 
href="#x1-96001r2">9.2<!--tex4ht:ref: tab:pkg-pretend-table --></a>), which is called outside of the normal
     call order process.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">pkg_setup</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_unpack</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_prepare </span>(only for EAPIs listed in table&#x00A0;<a 
href="#x1-99001r3">9.3<!--tex4ht:ref: tab:src-prepare-table --></a>)
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_configure </span>(only for EAPIs listed in table&#x00A0;<a 
href="#x1-100001r4">9.4<!--tex4ht:ref: tab:src-configure-table --></a>)
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_compile</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_test </span>(except if <span 
class="ectt-1000">RESTRICT=test </span>or disabled by user)
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_install</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">pkg_preinst</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">pkg_postinst</span></li></ul>
<!--l. 481--><p class="noindent" >The call order for uninstalling a package is:
</p><!--l. 484--><p class="noindent" >
     </p><ul>
     <li class="compactitem"><span 
class="ectt-1000">pkg_prerm</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">pkg_postrm</span></li></ul>
<!--l. 488--><p class="noindent" >The call order for upgrading, downgrading or reinstalling a package is:
</p><!--l. 491--><p class="noindent" >
     </p><ul>
     <li class="compactitem"><span 
class="ectt-1000">pkg_pretend </span>(only for EAPIs listed in table&#x00A0;<a 
href="#x1-96001r2">9.2<!--tex4ht:ref: tab:pkg-pretend-table --></a>), which is called outside of the normal
     call order process.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">pkg_setup</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_unpack</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_prepare </span>(only for EAPIs listed in table&#x00A0;<a 
href="#x1-99001r3">9.3<!--tex4ht:ref: tab:src-prepare-table --></a>)
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_configure </span>(only for EAPIs listed in table&#x00A0;<a 
href="#x1-100001r4">9.4<!--tex4ht:ref: tab:src-configure-table --></a>)
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_compile</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_test </span>(except if <span 
class="ectt-1000">RESTRICT=test</span>)
                                                                            
                                                                            
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_install</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">pkg_preinst</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">pkg_prerm </span>for the package being replaced
     </li>
     <li class="compactitem"><span 
class="ectt-1000">pkg_postrm </span>for the package being replaced
     </li>
     <li class="compactitem"><span 
class="ectt-1000">pkg_postinst</span></li></ul>
<!--l. 506--><p class="noindent" >Note: When up- or downgrading a package in EAPI 0 or 1, the last four phase functions can
alternatively be called in the order <span 
class="ectt-1000">pkg_preinst</span>, <span 
class="ectt-1000">pkg_postinst</span>, <span 
class="ectt-1000">pkg_prerm</span>, <span 
class="ectt-1000">pkg_postrm</span>. This
behaviour is deprecated.
</p><!--l. 510--><p class="noindent" >The <span 
class="ectt-1000">pkg_config</span>, <span 
class="ectt-1000">pkg_info </span>and <span 
class="ectt-1000">pkg_nofetch </span>functions are not called in a normal sequence. The
<span 
class="ectt-1000">pkg_pretend </span>function is called some unspecified time before a (possibly hypothetical) normal
sequence.
</p><!--l. 514--><p class="noindent" >For installing binary packages, the <span 
class="ectt-1000">src </span>phases are not called.
</p><!--l. 516--><p class="noindent" >When building binary packages that are not to be installed locally, the <span 
class="ectt-1000">pkg_preinst </span>and
<span 
class="ectt-1000">pkg_postinst </span>functions are not called.
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;10</span><br /><a 
 id="x1-11300010"></a>Eclasses</h2>
<!--l. 4--><p class="noindent" >Eclasses serve to store common code that is used by more than one ebuild, which greatly aids
maintainability and reduces the tree size. However, due to metadata cache issues, care must be
taken in their use. In format they are similar to an ebuild, and indeed are sourced as part of any
ebuild using them. The interpreter is therefore the same, and the same requirements for being
parseable hold.
</p><!--l. 10--><p class="noindent" >Eclasses must be located in the <span 
class="ectt-1000">eclass </span>directory in the top level of the repository&#8212;see section&#x00A0;<a 
href="#x1-410004.6">4.6<!--tex4ht:ref: sec:eclass-dir --></a>.
Each eclass is a single file named <span 
class="ectt-1000">&#x003C;name&#x003E;.eclass</span>, where <span 
class="ectt-1000">&#x003C;name&#x003E; </span>is the name of this eclass, used by
<span 
class="ectt-1000">inherit </span>and <span 
class="ectt-1000">EXPORT_FUNCTIONS </span>among other places.
</p>
<h3 class="sectionHead"><span class="titlemark">10.1   </span> <a 
 id="x1-11400010.1"></a>The inherit command</h3>
<!--l. 17--><p class="noindent" >An ebuild wishing to make use of an eclass does so by using the <span 
class="ectt-1000">inherit </span>command in global scope.
This will cause the eclass to be sourced as part of the ebuild&#8212;any function or variable definitions
in the eclass will appear as part of the ebuild, with exceptions for certain metadata variables, as
described below.
</p><!--l. 22--><p class="noindent" >The <span 
class="ectt-1000">inherit </span>command takes one or more parameters, which must be the names of eclasses
(excluding the <span 
class="ectt-1000">.eclass </span>suffix and the path). For each parameter, in order, the named eclass is
sourced.
</p><!--l. 25--><p class="noindent" >Eclasses may end up being sourced multiple times.
</p><!--l. 27--><p class="noindent" >The <span 
class="ectt-1000">inherit </span>command must also ensure that:
</p><!--l. 30--><p class="noindent" >
     </p><ul>
     <li class="compactitem">The <span 
class="ectt-1000">ECLASS </span>variable is set to the name of the current eclass, when sourcing that eclass.
     </li>
     <li class="compactitem">Once all inheriting has been done, the <span 
class="ectt-1000">INHERITED </span>metadata variable contains the name
     of every eclass used, separated by whitespace.</li></ul>
<!--l. 35--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">10.2   </span> <a 
 id="x1-11500010.2"></a>Eclass-defined Metadata Keys</h3>
<!--l. 37--><p class="noindent" >The <span 
class="ectt-1000">IUSE</span>, <span 
class="ectt-1000">REQUIRED_USE</span>, <span 
class="ectt-1000">DEPEND</span>, <span 
class="ectt-1000">RDEPEND </span>and <span 
class="ectt-1000">PDEPEND </span>variables are handled specially when set
by an eclass. They must be accumulated across eclasses, appending the value set by each eclass to
the resulting value after the previous one is loaded. Then the eclass-defined value is appended to
that defined by the ebuild. In the case of <span 
class="ectt-1000">RDEPEND</span>, this is done after the implicit <span 
class="ectt-1000">RDEPEND </span>rules in
section&#x00A0;<a 
href="#x1-700007.3.3">7.3.3<!--tex4ht:ref: sec:rdepend-depend --></a> are applied.
</p><!--l. 43--><p class="noindent" >
</p>
<h3 class="sectionHead"><span class="titlemark">10.3   </span> <a 
 id="x1-11600010.3"></a>EXPORT_FUNCTIONS</h3>
<!--l. 45--><p class="noindent" >There is one command available in the eclass environment that is neither available nor meaningful
in ebuilds&#8212;<span 
class="ectt-1000">EXPORT_FUNCTIONS</span>. This can be used to alias ebuild phase functions from the eclass so
that an ebuild inherits a default definition whilst retaining the ability to override and call the
eclass-defined version from it. The use of it is best illustrated by an example; this is given in
                                                                            
                                                                            
listing&#x00A0;<a 
href="#x1-116001r1">10.1<!--tex4ht:ref: lst:export-functions --></a> and is a snippet from a hypothetical <span 
class="ectt-1000">foo.eclass</span>.
                                                                            
                                                                            
</p><!--l. 52--><p class="noindent" ><a 
 id="x1-116001r1"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Listing 10.1: </span><span  
class="content">EXPORT_FUNCTIONS example: foo.eclass</span></div><!--tex4ht:label?: x1-116001r1 -->
                                                                            
                                                                            
<div class="verbatim" id="verbatim-13">
foo_src_compile()
&#x00A0;<br />{
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;econf&#x00A0;--enable-gerbil&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;&#x00A0;$(use_enable&#x00A0;fnord)
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;gerbil&#x00A0;||&#x00A0;die&#x00A0;"Couldn&#8217;t&#x00A0;make&#x00A0;a&#x00A0;gerbil"
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;&#x00A0;emake&#x00A0;||&#x00A0;die&#x00A0;"emake&#x00A0;failed"
&#x00A0;<br />}
&#x00A0;<br />
&#x00A0;<br />EXPORT_FUNCTIONS&#x00A0;src_compile
&#x00A0;<br />&#x00A0;&#x00A0;</div>
<!--l. 63--><p class="nopar" >
                                                                            
                                                                            
</p>
</div><hr class="endfloat" />
<!--l. 66--><p class="noindent" >This example defines an eclass <span 
class="ectt-1000">src_compile </span>function and uses <span 
class="ectt-1000">EXPORT_FUNCTIONS </span>to alias it.
Then any ebuild that inherits <span 
class="ectt-1000">foo.eclass </span>will have a default <span 
class="ectt-1000">src_compile </span>defined, but
should the author wish to override it he can access the function in <span 
class="ectt-1000">foo.eclass </span>by calling
<span 
class="ectt-1000">foo_src_compile</span>.
</p><!--l. 71--><p class="noindent" ><span 
class="ectt-1000">EXPORT_FUNCTIONS </span>must only be used on ebuild phase functions. The function that is aliased
must be named <span 
class="ectt-1000">eclassname_phasefunctionname</span>, where <span 
class="ectt-1000">eclassname </span>is the name of the
eclass.
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;11</span><br /><a 
 id="x1-11700011"></a>The Ebuild Environment</h2>
<h3 class="sectionHead"><span class="titlemark">11.1   </span> <a 
 id="x1-11800011.1"></a>Defined Variables</h3>
<!--l. 4--><p class="noindent" >The package manager must define the following environment variables. Not all variables are
meaningful in all phases; variables that are not meaningful in a given phase may be unset or set to
any value. Ebuilds must not attempt to modify any of these variables, unless otherwise
specified.
</p><!--l. 8--><p class="noindent" >Because of their special meanings, these variables may not be preserved consistently across all
phases as would normally happen due to environment saving (see&#x00A0;<a 
href="#x1-12200011.2">11.2<!--tex4ht:ref: sec:ebuild-env-state --></a>). For example,
<span 
class="ectt-1000">EBUILD_PHASE </span>is different for every phase, and <span 
class="ectt-1000">ROOT </span>may have changed between the various
different <span 
class="ectt-1000">pkg_* </span>phases. Ebuilds must recalculate any variable they derive from an inconsistent
variable.
                                                                            
                                                                            
                                                                            <a 
 id="x1-118001r1"></a>
</p><!--l. 16--><div class="longtable"> <table id="TBL-23" class="longtable" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-23-1g"><col 
id="TBL-23-1" /><col 
id="TBL-23-2" /><col 
id="TBL-23-3" /><col 
id="TBL-23-4" /></colgroup>
<tr  
 style="vertical-align:baseline;" id="TBL-23-1-"><td colspan="4" style="white-space:nowrap; text-align:center;" id="TBL-23-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"> <div class="caption" 
><span class="id">Table&#x00A0;11.1: </span><span  
class="content">Defined variables</span></div><!--tex4ht:label?: x1-118001r1 -->                                               </div>  <a 
 id="x1-118002"></a>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-23-2-"><td colspan="4" style="white-space:nowrap; text-align:left;" id="TBL-23-2-1"  
class="td11"><!--cmidrule-->
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-23-3-"><td  style="white-space:nowrap; text-align:center;" id="TBL-23-3-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Variable</span></div>  </td><td  style="white-space:nowrap; text-align:center;" id="TBL-23-3-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Legal in</span></div>  </td><td  style="white-space:nowrap; text-align:center;" id="TBL-23-3-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Consistent?</span></div>  </td><td  style="white-space:nowrap; text-align:center;" id="TBL-23-3-4"  
class="td11">   <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Description</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-23-4-"><td colspan="4" style="white-space:nowrap; text-align:left;" id="TBL-23-4-1"  
class="td11"><!--cmidrule-->
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-23-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-5-1"  
class="td11">          </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-23-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-6-1"  
class="td11"></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-6-2"  
class="td11">          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-6-3"  
class="td11">             </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-6-4"  
class="td11">
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-23-18-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-18-1"  
class="td11"> <span 
class="ectt-1000">P                                                                                                                                        </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-18-2"  
class="td11">
 <!--l. 36--><p class="noindent" >all                                                                                                                                                                                                                                      </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-18-3"  
class="td11"> No<span class="footnote-mark"><a 
href="pms3.html#fn1x12"><sup class="textsuperscript">1</sup></a></span><a 
 id="x1-118003f1"></a>            </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-18-4"  
class="td11">
 <!--l. 38--><p class="noindent" >Package   name   and   version,   without   the
  revision part. For example, <span 
class="ectt-1000">vim-7.0.174</span>.       </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-19-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-19-1"  
class="td11"> <span 
class="ectt-1000">PN                                                                                                                                       </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-19-2"  
class="td11">
 <!--l. 40--><p class="noindent" >all                                                                                                                                                                                                                                      </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-19-3"  
class="td11"> ditto                                                                                                                                                                                                                          </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-19-4"  
class="td11">
 <!--l. 42--><p class="noindent" >Package name, for example <span 
class="ectt-1000">vim</span>.                    </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-20-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-20-1"  
class="td11"> <span 
class="ectt-1000">CATEGORY                                                                                                                                 </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-20-2"  
class="td11">
 <!--l. 44--><p class="noindent" >all                                                                                                                                                                                                                                      </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-20-3"  
class="td11"> ditto                                                                                                                                                                                                                          </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-20-4"  
class="td11">
 <!--l. 46--><p class="noindent" >The    package&#8217;s    category,    for    example
  <span 
class="ectt-1000">app-editors</span>.                                            </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-21-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-21-1"  
class="td11"> <span 
class="ectt-1000">PV                                                                                                                                       </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-21-2"  
class="td11">
 <!--l. 48--><p class="noindent" >all                                                                                                                                                                                                                                      </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-21-3"  
class="td11"> Yes                                                                                                                                                                                                                            </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-21-4"  
class="td11">
 <!--l. 50--><p class="noindent" >Package version, with no revision. For example
  <span 
class="ectt-1000">7.0.174</span>.                                                  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-22-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-22-1"  
class="td11"> <span 
class="ectt-1000">PR                                                                                                                                       </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-22-2"  
class="td11">
 <!--l. 52--><p class="noindent" >all                                                                                                                                                                                                                                      </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-22-3"  
class="td11"> Yes                                                                                                                                                                                                                            </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-22-4"  
class="td11">
 <!--l. 54--><p class="noindent" >Package revision, or <span 
class="ectt-1000">r0 </span>if none exists.             </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-23-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-23-1"  
class="td11"> <span 
class="ectt-1000">PVR                                                                                                                                      </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-23-2"  
class="td11">
 <!--l. 56--><p class="noindent" >all                                                                                                                                                                                                                                      </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-23-3"  
class="td11"> Yes                                                                                                                                                                                                                            </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-23-4"  
class="td11">
 <!--l. 58--><p class="noindent" >Package  version  and  revision  (if  any),  for
  example <span 
class="ectt-1000">7.0.174 </span>or <span 
class="ectt-1000">7.0.174-r1</span>.                  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-24-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-24-1"  
class="td11"> <span 
class="ectt-1000">PF                                                                                                                                       </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-24-2"  
class="td11">
 <!--l. 60--><p class="noindent" >all                                                                                                                                                                                                                                      </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-24-3"  
class="td11"> Yes                                                                                                                                                                                                                            </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-24-4"  
class="td11">
 <!--l. 62--><p class="noindent" >Package name, version, and revision (if any),
  for example <span 
class="ectt-1000">vim-7.0.174-r1</span>.                       </p></td>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
                                                                            
                                                                            
                                                                            </tr><tr  
 style="vertical-align:baseline;" id="TBL-23-25-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-25-1"  
class="td11"> <span 
class="ectt-1000">A                                                                                                                                        </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-25-2"  
class="td11">
 <!--l. 64--><p class="noindent" ><span 
class="ectt-1000">src_*</span>                                                                                                                                               </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-25-3"  
class="td11"> Yes                                                                                                                                                                                                                            </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-25-4"  
class="td11">
 <!--l. 66--><p class="noindent" >All  source  files  available  for  the  package,
  whitespace  separated  with  no  leading  or
  trailing whitespace, and in the order in which
  the item first appears in a matched component
  of  <span 
class="ectt-1000">SRC_URI</span>.  Does  not  include  any  that  are
  disabled  because  of  USE  conditionals.  The
  value  is  calculated  from  the  base  names  of
  each element of the <span 
class="ectt-1000">SRC_URI </span>ebuild metadata
  variable.                                                   </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-26-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-26-1"  
class="td11"> <span 
class="ectt-1000">AA</span><span class="footnote-mark"><a 
href="pms4.html#fn2x12"><sup class="textsuperscript">2</sup></a></span><a 
 id="x1-118004f2"></a>   </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-26-2"  
class="td11">
 <!--l. 74--><p class="noindent" ><span 
class="ectt-1000">src_*</span>                                                                                                                                               </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-26-3"  
class="td11"> Yes                                                                                                                                                                                                                            </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-26-4"  
class="td11">
<!--l. 76--><p class="noindent" >
<span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">A</span><span 
class="small-caps">A</span></span> </span>  </p><!--l. 76--><p class="noindent" >All  source  files  that  could  be  available  for
  the package, including any that are disabled
  in <span 
class="ectt-1000">A </span>because of USE conditionals. The value
  is  calculated  from  the  base  names  of  each
  element  of  the  <span 
class="ectt-1000">SRC_URI  </span>ebuild  metadata
  variable. Only for EAPIs listed in table&#x00A0;<a 
href="#x1-118008r3">11.3<!--tex4ht:ref: tab:removed-env-vars-table --></a>
  as supporting <span 
class="ectt-1000">AA</span>.                                       </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-27-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-27-1"  
class="td11"> <span 
class="ectt-1000">FILESDIR                                                                                                                                 </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-27-2"  
class="td11">
 <!--l. 81--><p class="noindent" ><span 
class="ectt-1000">src_*</span><span class="footnote-mark"><a 
href="pms5.html#fn3x12"><sup class="textsuperscript">3</sup></a></span>             <a 
 id="x1-118005f3"></a>   </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-27-3"  
class="td11"> No                                                                                                                                                                                                                             </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-27-4"  
class="td11">
 <!--l. 83--><p class="noindent" >The full path to the package&#8217;s files directory,
  used  for  small  support  files  or  patches.  See
  section&#x00A0;<a 
href="#x1-340004.3">4.3<!--tex4ht:ref: sec:package-dirs --></a>.  May  or  may  not  exist;  if  a
  repository  provides  no  support  files  for  the
  package in question then an ebuild must be
  prepared  for  the  situation  where  <span 
class="ectt-1000">FILESDIR</span>
 points to a non-existent directory.                 </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-28-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-28-1"  
class="td11"> <span 
class="ectt-1000">PORTDIR                                                                                                                                  </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-28-2"  
class="td11">
 <!--l. 88--><p class="noindent" >ditto                                                                                                                                                                                                                                   </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-28-3"  
class="td11"> No                                                                                                                                                                                                                             </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-28-4"  
class="td11">
 <!--l. 90--><p class="noindent" >The full path to the master repository&#8217;s base
  directory.                                                 </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-29-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-29-1"  
class="td11"> <span 
class="ectt-1000">DISTDIR                                                                                                                                  </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-29-2"  
class="td11">
 <!--l. 92--><p class="noindent" >ditto                                                                                                                                                                                                                                   </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-29-3"  
class="td11"> No                                                                                                                                                                                                                             </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-29-4"  
class="td11">
 <!--l. 94--><p class="noindent" >The full path to the directory in which the files
  in the <span 
class="ectt-1000">A </span>variable are stored.                         </p></td>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
                                                                            
                                                                            
                                                                            </tr><tr  
 style="vertical-align:baseline;" id="TBL-23-30-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-30-1"  
class="td11"> <span 
class="ectt-1000">ECLASSDIR                                                                                                                                </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-30-2"  
class="td11">
 <!--l. 96--><p class="noindent" >ditto                                                                                                                                                                                                                                   </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-30-3"  
class="td11"> No                                                                                                                                                                                                                             </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-30-4"  
class="td11">
 <!--l. 98--><p class="noindent" >The full path to the master repository&#8217;s eclass
  directory.                                                 </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-31-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-31-1"  
class="td11"> <span 
class="ectt-1000">ROOT                                                                                                                                     </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-31-2"  
class="td11">
 <!--l. 100--><p class="noindent" ><span 
class="ectt-1000">pkg_*</span>                                                                                                                                               </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-31-3"  
class="td11"> No                                                                                                                                                                                                                             </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-31-4"  
class="td11">
 <!--l. 102--><p class="noindent" >The absolute path to the root directory into
  which  the  package  is  to  be  merged.  Phases
  which run with full filesystem access must not
  touch any files outside of the directory given in
  <span 
class="ectt-1000">ROOT</span>. Also of note is that in a cross-compiling
  environment, binaries inside of <span 
class="ectt-1000">ROOT </span>will not
  be executable on the build machine, so ebuilds
  must not call them. <span 
class="ectt-1000">ROOT </span>must be non-empty
  and end in a trailing slash.                           </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-32-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-32-1"  
class="td11"> <span 
class="ectt-1000">EROOT                                                                                                                                    </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-32-2"  
class="td11">
 <!--l. 108--><p class="noindent" ><span 
class="ectt-1000">pkg_*</span>                                                                                                                                               </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-32-3"  
class="td11"> No                                                                                                                                                                                                                             </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-32-4"  
class="td11">
 <!--l. 110--><p class="noindent" >Contains the path <span 
class="ectt-1000">${ROOT%/}${EPREFIX}/ </span>for
  convenience.  See  also  the  <span 
class="ectt-1000">EPREFIX </span>variable.
  Only   for   EAPIs   listed   in   table&#x00A0;<a 
href="#x1-118009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a>   as
  supporting <span 
class="ectt-1000">EROOT</span>.                                      </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-33-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-33-1"  
class="td11"> <span 
class="ectt-1000">T                                                                                                                                        </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-33-2"  
class="td11">
 <!--l. 114--><p class="noindent" >All                                                                                                                                                                                                                                     </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-33-3"  
class="td11"> Partially<span class="footnote-mark"><a 
href="pms6.html#fn4x12"><sup class="textsuperscript">4</sup></a></span><a 
 id="x1-118006f4"></a>   </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-33-4"  
class="td11">
 <!--l. 118--><p class="noindent" >The full path to a temporary directory for use
  by the ebuild.                                            </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-34-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-34-1"  
class="td11"> <span 
class="ectt-1000">TMPDIR                                                                                                                                   </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-34-2"  
class="td11">
 <!--l. 120--><p class="noindent" >All                                                                                                                                                                                                                                     </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-34-3"  
class="td11"> Ditto                                                                                                                                                                                                                          </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-34-4"  
class="td11">
 <!--l. 122--><p class="noindent" >Must  be  set  to  the  location  of  a  usable
  temporary   directory,   for   any   applications
  called  by  an  ebuild.  Must  not  be  used  by
  ebuilds directly; see <span 
class="ectt-1000">T </span>above.                        </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-35-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-35-1"  
class="td11"> <span 
class="ectt-1000">HOME                                                                                                                                     </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-35-2"  
class="td11">
 <!--l. 125--><p class="noindent" >All                                                                                                                                                                                                                                     </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-35-3"  
class="td11"> Ditto                                                                                                                                                                                                                          </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-35-4"  
class="td11">
 <!--l. 127--><p class="noindent" >The  full  path  to  an  appropriate  temporary
  directory for use by any programs invoked by
  the ebuild that may read or modify the home
  directory.                                                 </p></td>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
                                                                            
                                                                            
                                                                            </tr><tr  
 style="vertical-align:baseline;" id="TBL-23-36-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-36-1"  
class="td11"> <span 
class="ectt-1000">EPREFIX                                                                                                                                  </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-36-2"  
class="td11">
 <!--l. 130--><p class="noindent" >All                                                                                                                                                                                                                                     </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-36-3"  
class="td11"> Yes                                                                                                                                                                                                                            </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-36-4"  
class="td11">
 <!--l. 132--><p class="noindent" >The normalised offset-prefix path of an offset
  installation.  When  <span 
class="ectt-1000">EPREFIX </span>is  not  set  in
  the calling environment, <span 
class="ectt-1000">EPREFIX </span>defaults to
  the built-in offset-prefix that was set during
  installation of the package manager. When a
  different <span 
class="ectt-1000">EPREFIX </span>value than the built-in value
  is set in the calling environment, a cross-prefix
  build  is  performed  where  using  the  existing
  utilities,  a  package  is  built  for  the  given
  <span 
class="ectt-1000">EPREFIX</span>, akin to <span 
class="ectt-1000">ROOT</span>. See also&#x00A0;<a 
href="#x1-12100011.1.3">11.1.3<!--tex4ht:ref: sec:offset-vars --></a>. Only
  for EAPIs listed in table&#x00A0;<a 
href="#x1-118009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a> as supporting
  <span 
class="ectt-1000">EPREFIX</span>.                                                  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-37-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-37-1"  
class="td11"> <span 
class="ectt-1000">D                                                                                                                                        </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-37-2"  
class="td11">
 <!--l. 139--><p class="noindent" ><span 
class="ectt-1000">src_install</span>                                                                                                                                         </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-37-3"  
class="td11"> No                                                                                                                                                                                                                             </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-37-4"  
class="td11">
 <!--l. 141--><p class="noindent" >Contains the full path to the image directory
  into  which  the  package  should  be  installed.
  Must be non-empty and end in a trailing slash.  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-38-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-38-1"  
class="td11">                                                                                                                                           </td></tr>
<tr  
 style="vertical-align:baseline;" id="TBL-23-39-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-39-1"  
class="td11"> <span 
class="ectt-1000">D </span>(continued)              </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-39-2"  
class="td11">
 <!--l. 144--><p class="noindent" ><span 
class="ectt-1000">pkg_preinst</span>,
  <span 
class="ectt-1000">pkg_postinst</span>  </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-39-3"  
class="td11"> Yes    </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-39-4"  
class="td11">
 <!--l. 146--><p class="noindent" >Contains the full path to the image that is
  about to be or has just been merged. Must be
  non-empty and end in a trailing slash.            </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-40-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-40-1"  
class="td11"> <span 
class="ectt-1000">ED                  </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-40-2"  
class="td11">
 <!--l. 149--><p class="noindent" ><span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">install</span>,   <span 
class="ectt-1000">pkg_</span>
 <span 
class="ectt-1000">preinst</span>,   <span 
class="ectt-1000">pkg_</span>
 <span 
class="ectt-1000">postinst</span>      </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-40-3"  
class="td11"> See <span 
class="ectt-1000">D </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-40-4"  
class="td11">
 <!--l. 151--><p class="noindent" >Contains  the  path  <span 
class="ectt-1000">${D%/}${EPREFIX}/ </span>for
  convenience.  See  also  the  <span 
class="ectt-1000">EPREFIX </span>variable.
  Only   for   EAPIs   listed   in   table&#x00A0;<a 
href="#x1-118009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a>   as
  supporting <span 
class="ectt-1000">ED</span>.                                           </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-41-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-41-1"  
class="td11"> <span 
class="ectt-1000">INSDESTTREE         </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-41-2"  
class="td11">
 <!--l. 155--><p class="noindent" ><span 
class="ectt-1000">src_install</span>   </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-41-3"  
class="td11"> No     </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-41-4"  
class="td11">
 <!--l. 157--><p class="noindent" >Controls  the  location  where  doins  installs
  things.                                                     </p></td>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
                                                                            
                                                                            
                                                                            </tr><tr  
 style="vertical-align:baseline;" id="TBL-23-42-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-42-1"  
class="td11"> <span 
class="ectt-1000">USE                 </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-42-2"  
class="td11">
 <!--l. 159--><p class="noindent" >All                   </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-42-3"  
class="td11"> Yes    </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-42-4"  
class="td11">
 <!--l. 161--><p class="noindent" >A whitespace-delimited list of all active USE
  flags  for  this  ebuild.  See  section&#x00A0;<a 
href="#x1-11900011.1.1">11.1.1<!--tex4ht:ref: sec:use-iuse-handling --></a>  for
  details.                                                    </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-43-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-43-1"  
class="td11"> <span 
class="ectt-1000">EBUILD_PHASE        </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-43-2"  
class="td11">
 <!--l. 164--><p class="noindent" >All                   </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-43-3"  
class="td11"> No     </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-43-4"  
class="td11">
 <!--l. 166--><p class="noindent" >Takes  one  of  the  values  <span 
class="ectt-1000">config</span>,  <span 
class="ectt-1000">setup</span>,
  <span 
class="ectt-1000">nofetch</span>,    <span 
class="ectt-1000">unpack</span>,    <span 
class="ectt-1000">prepare</span>,    <span 
class="ectt-1000">configure</span>,
  <span 
class="ectt-1000">compile</span>, <span 
class="ectt-1000">test</span>, <span 
class="ectt-1000">install</span>, <span 
class="ectt-1000">preinst</span>, <span 
class="ectt-1000">postinst</span>,
  <span 
class="ectt-1000">prerm</span>,  <span 
class="ectt-1000">postrm</span>,  <span 
class="ectt-1000">info</span>,  <span 
class="ectt-1000">pretend </span>according  to
  the top level ebuild function that was executed
  by  the  package  manager.  May  be  unset  or
  any single word that is not any of the above
  when  the  ebuild  is  being  sourced  for  other
  (e. g.&#x00A0;metadata or QA) purposes.                  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-44-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-44-1"  
class="td11"> <span 
class="ectt-1000">EBUILD_PHASE_FUNC   </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-44-2"  
class="td11">
 <!--l. 172--><p class="noindent" >All                   </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-44-3"  
class="td11"> No     </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-44-4"  
class="td11">
<!--l. 174--><p class="noindent" >
<span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">E</span><span 
class="small-caps">B</span><span 
class="small-caps">U</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">D</span>-<span 
class="small-caps">P</span><span 
class="small-caps">H</span><span 
class="small-caps">A</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">F</span><span 
class="small-caps">U</span><span 
class="small-caps">N</span><span 
class="small-caps">C</span></span> </span>  </p><!--l. 174--><p class="noindent" >Takes              one              of              the
  values <span 
class="ectt-1000">pkg_config</span>, <span 
class="ectt-1000">pkg_setup</span>, <span 
class="ectt-1000">pkg_nofetch</span>,
  <span 
class="ectt-1000">src_unpack</span>,  <span 
class="ectt-1000">src_prepare</span>,  <span 
class="ectt-1000">src_configure</span>,
  <span 
class="ectt-1000">src_compile</span>, <span 
class="ectt-1000">src_test</span>, <span 
class="ectt-1000">src_install</span>, <span 
class="ectt-1000">pkg_</span>
 <span 
class="ectt-1000">preinst</span>,  <span 
class="ectt-1000">pkg_postinst</span>,  <span 
class="ectt-1000">pkg_prerm</span>,  <span 
class="ectt-1000">pkg_</span>
 <span 
class="ectt-1000">postrm</span>,  <span 
class="ectt-1000">pkg_info</span>,  <span 
class="ectt-1000">pkg_pretend </span>according
  to  the  top  level  ebuild  function  that  was
  executed  by  the  package  manager.  May  be
  unset or any single word that is not any of
  the above when the ebuild is being sourced for
  other (e. g.&#x00A0;metadata or QA) purposes. Only
  for EAPIs listed in table&#x00A0;<a 
href="#x1-118007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a> as supporting
  <span 
class="ectt-1000">EBUILD_PHASE_FUNC</span>.                                  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-45-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-45-1"  
class="td11"> <span 
class="ectt-1000">WORKDIR             </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-45-2"  
class="td11">
 <!--l. 182--><p class="noindent" ><span 
class="ectt-1000">src_*</span>,
  global&#x00A0;scope      </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-45-3"  
class="td11"> Yes    </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-45-4"  
class="td11">
 <!--l. 184--><p class="noindent" >The full path to the ebuild&#8217;s working directory,
  in which all build data should be contained.    </p></td>
                                                                                                                                                 
                                                                            
                                                                            
                                                                            </tr><tr  
 style="vertical-align:baseline;" id="TBL-23-46-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-46-1"  
class="td11"> <span 
class="ectt-1000">S                   </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-46-2"  
class="td11">
 <!--l. 187--><p class="noindent" ><span 
class="ectt-1000">src_*</span>         </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-46-3"  
class="td11"> Yes    </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-46-4"  
class="td11">
 <!--l. 189--><p class="noindent" >The   full   path   to   the   temporary   build
  directory, used by <span 
class="ectt-1000">src_compile</span>, <span 
class="ectt-1000">src_install</span>
 etc.  Defaults  to  <span 
class="ectt-1000">${WORKDIR}/${P}</span>.  May  be
  modified  by  ebuilds.  If  <span 
class="ectt-1000">S </span>is  assigned  in  the
  global scope of an ebuild, then the restrictions
  of section&#x00A0;<a 
href="#x1-12200011.2">11.2<!--tex4ht:ref: sec:ebuild-env-state --></a> for global variables apply.        </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-47-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-47-1"  
class="td11"> <span 
class="ectt-1000">KV                  </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-47-2"  
class="td11">
 <!--l. 194--><p class="noindent" >All                   </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-47-3"  
class="td11"> Yes    </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-47-4"  
class="td11">
<!--l. 196--><p class="noindent" >
<span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">K</span><span 
class="small-caps">V</span></span> </span>  </p><!--l. 196--><p class="noindent" >The version of the running kernel at the time
  the ebuild was first executed, as returned by
  the <span 
class="ectt-1000">uname</span><span 
class="ectt-1000">&#x00A0;-r </span>command or equivalent. May be
  modified by ebuilds. Only for EAPIs listed in
  table&#x00A0;<a 
href="#x1-118008r3">11.3<!--tex4ht:ref: tab:removed-env-vars-table --></a> as supporting <span 
class="ectt-1000">KV</span>.                         </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-48-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-48-1"  
class="td11"> <span 
class="ectt-1000">MERGE_TYPE          </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-48-2"  
class="td11">
 <!--l. 200--><p class="noindent" ><span 
class="ectt-1000">pkg_*</span>         </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-48-3"  
class="td11"> No     </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-48-4"  
class="td11">
<!--l. 202--><p class="noindent" >
<span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">M</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span><span 
class="small-caps">G</span><span 
class="small-caps">E</span>-<span 
class="small-caps">T</span><span 
class="small-caps">Y</span><span 
class="small-caps">P</span><span 
class="small-caps">E</span></span> </span>  </p><!--l. 202--><p class="noindent" >The  type  of  package  that  is  being  merged.
  Possible  values  are:  <span 
class="ectt-1000">source </span>if  building  and
  installing  a  package  from  source,  <span 
class="ectt-1000">binary </span>if
  installing a binary package, and <span 
class="ectt-1000">buildonly </span>if
  building a binary package without installing
  it.  Only  for  EAPIs  listed  in  table&#x00A0;<a 
href="#x1-118007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a>  as
  supporting <span 
class="ectt-1000">MERGE_TYPE</span>.                              </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-49-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-49-1"  
class="td11"> <span 
class="ectt-1000">REPLACING_VERSIONS  </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-49-2"  
class="td11">
 <!--l. 207--><p class="noindent" ><span 
class="ectt-1000">pkg_* </span>(see text)  </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-49-3"  
class="td11"> Yes    </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-49-4"  
class="td11">
 <!--l. 209--><p class="noindent" >A whitespace-separated list of versions of this
  package (including revision, if specified) that
  are being replaced (uninstalled or overwritten)
  as a result of this install. See section&#x00A0;<a 
href="#x1-12000011.1.2">11.1.2<!--tex4ht:ref: sec:replacing-versions --></a>.
  Only   for   EAPIs   listed   in   table&#x00A0;<a 
href="#x1-118007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a>   as
  supporting <span 
class="ectt-1000">REPLACING_VERSIONS</span>.                 </p></td>
                                                                                                                                                 
                                                                            
                                                                            
                                                                            </tr><tr  
 style="vertical-align:baseline;" id="TBL-23-50-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-50-1"  
class="td11"> <span 
class="ectt-1000">REPLACED_BY_VERSION </span></td><td  style="white-space:wrap; text-align:left;" id="TBL-23-50-2"  
class="td11">
 <!--l. 214--><p class="noindent" ><span 
class="ectt-1000">pkg_prerm</span>,
  <span 
class="ectt-1000">pkg_postrm</span>    </p></td><td  style="white-space:nowrap; text-align:left;" id="TBL-23-50-3"  
class="td11"> Yes    </td><td  style="white-space:wrap; text-align:left;" id="TBL-23-50-4"  
class="td11">
 <!--l. 216--><p class="noindent" >The single version of this package (including
  revision, if specified) that is replacing us, if we
  are being uninstalled as part of an install, or
  an empty string otherwise. See section&#x00A0;<a 
href="#x1-12000011.1.2">11.1.2<!--tex4ht:ref: sec:replacing-versions --></a>.
  Only   for   EAPIs   listed   in   table&#x00A0;<a 
href="#x1-118007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a>   as
  supporting <span 
class="ectt-1000">REPLACED_BY_VERSION</span>.                </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-51-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-51-1"  
class="td11">                     </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-23-52-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-52-1"  
class="td11"></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-53-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-53-1"  
class="td11">                     </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-23-54-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-54-1"  
class="td11"></td>
</tr>
<tr  
 style="vertical-align:baseline;" id="TBL-23-15-"><td colspan="4" style="white-space:nowrap; text-align:left;" id="TBL-23-15-1"  
class="td11"><!--cmidrule--></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-23-16-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-16-1"  
class="td11">  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-23-17-"><td  style="white-space:nowrap; text-align:left;" id="TBL-23-17-1"  
class="td11">  </td></tr>
</table></div>
                                                                                                                                     
                                                                            
                                                                            
<div class="table">
                                                                            
                                                                            
<!--l. 224--><p class="noindent" ><a 
 id="x1-118007r2"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.2: </span><span  
class="content">EAPIs supporting various added env variables</span></div><!--tex4ht:label?: x1-118007r2 -->
<div class="tabular">
 <table id="TBL-24" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-24-1g"><col 
id="TBL-24-1" /><col 
id="TBL-24-2" /><col 
id="TBL-24-3" /><col 
id="TBL-24-4" /><col 
id="TBL-24-5" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-24-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-24-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-24-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">MERGE_TYPE</span><span 
class="ecbx-1000">?</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-24-1-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">REPLACING_VERSIONS</span><span 
class="ecbx-1000">?</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-24-1-4"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">REPLACED_BY_VERSION</span><span 
class="ecbx-1000">?</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-24-1-5"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">EBUILD_PHASE_FUNC</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-24-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-24-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-2-2"  
class="td11"> No               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-2-3"  
class="td11"> No                            </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-2-4"  
class="td11"> No                              </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-2-5"  
class="td11"> No                          </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-24-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-24-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-3-2"  
class="td11"> No </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-3-3"  
class="td11"> No </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-3-4"  
class="td11"> No </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-3-5"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-24-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-24-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-4-2"  
class="td11"> No               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-4-3"  
class="td11"> No                            </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-4-4"  
class="td11"> No                              </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-4-5"  
class="td11"> No                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-24-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-24-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-5-2"  
class="td11"> No               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-5-3"  
class="td11"> No                            </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-5-4"  
class="td11"> No                              </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-5-5"  
class="td11"> No                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-24-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-24-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-6-2"  
class="td11"> Yes               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-6-3"  
class="td11"> Yes                           </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-6-4"  
class="td11"> Yes                             </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-6-5"  
class="td11"> No                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-24-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-24-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-7-2"  
class="td11"> Yes               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-7-3"  
class="td11"> Yes                           </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-7-4"  
class="td11"> Yes                             </td><td  style="white-space:nowrap; text-align:left;" id="TBL-24-7-5"  
class="td11"> Yes                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-24-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-24-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 244--><p class="noindent" ><a 
 id="x1-118008r3"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.3: </span><span  
class="content">EAPIs supporting various removed env variables</span></div><!--tex4ht:label?: x1-118008r3 -->
<div class="tabular">
 <table id="TBL-25" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-25-1g"><col 
id="TBL-25-1" /><col 
id="TBL-25-2" /><col 
id="TBL-25-3" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-25-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-25-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-25-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">AA</span><span 
class="ecbx-1000">?</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-25-1-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">KV</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-25-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-25-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-2-2"  
class="td11"> Yes  </td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-2-3"  
class="td11"> Yes  </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-25-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-25-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-3-2"  
class="td11"> Yes </td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-3-3"  
class="td11"> Yes</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-25-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-25-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-4-2"  
class="td11"> Yes  </td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-4-3"  
class="td11"> Yes  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-25-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-25-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-5-2"  
class="td11"> Yes  </td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-5-3"  
class="td11"> Yes  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-25-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-25-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-6-2"  
class="td11"> No   </td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-6-3"  
class="td11"> No   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-25-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-25-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-7-2"  
class="td11"> No   </td><td  style="white-space:nowrap; text-align:left;" id="TBL-25-7-3"  
class="td11"> No   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-25-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-25-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 262--><p class="noindent" ><a 
 id="x1-118009r4"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.4: </span><span  
class="content">EAPIs supporting offset-prefix env variables</span></div><!--tex4ht:label?: x1-118009r4 -->
<div class="tabular">
 <table id="TBL-26" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-26-1g"><col 
id="TBL-26-1" /><col 
id="TBL-26-2" /><col 
id="TBL-26-3" /><col 
id="TBL-26-4" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-26-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-26-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-26-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">EPREFIX</span><span 
class="ecbx-1000">?</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-26-1-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">EROOT</span><span 
class="ecbx-1000">?</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-26-1-4"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">ED</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-26-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-26-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-2-2"  
class="td11"> No           </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-2-3"  
class="td11"> No        </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-2-4"  
class="td11"> No   </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-26-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-26-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-3-2"  
class="td11"> No </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-3-3"  
class="td11"> No </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-3-4"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-26-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-26-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-4-2"  
class="td11"> No           </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-4-3"  
class="td11"> No        </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-4-4"  
class="td11"> No   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-26-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-26-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-5-2"  
class="td11"> Yes          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-5-3"  
class="td11"> Yes       </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-5-4"  
class="td11"> Yes  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-26-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-26-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-6-2"  
class="td11"> Yes          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-6-3"  
class="td11"> Yes       </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-6-4"  
class="td11"> Yes  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-26-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-26-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-7-2"  
class="td11"> Yes          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-7-3"  
class="td11"> Yes       </td><td  style="white-space:nowrap; text-align:left;" id="TBL-26-7-4"  
class="td11"> Yes  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-26-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-26-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<!--l. 281--><p class="noindent" >Except where otherwise noted, all variables set in the active profiles&#8217; <span 
class="ectt-1000">make.defaults </span>files must be
exported to the ebuild environment. <span 
class="ectt-1000">CHOST</span>, <span 
class="ectt-1000">CBUILD </span>and <span 
class="ectt-1000">CTARGET</span>, if not set by profiles, must
contain either an appropriate machine tuple (the definition of appropriate is beyond the scope of
this specification) or be unset.
</p><!--l. 286--><p class="noindent" ><span 
class="ectt-1000">PATH </span>must be initialized by the package manager to a &#8220;usable&#8221; default. The exact value here is left
up to interpretation, but it should include the equivalent &#8220;sbin&#8221; and &#8220;bin&#8221; and any package
manager specific directories.
</p><!--l. 290--><p class="noindent" ><span 
class="ectt-1000">GZIP</span>, <span 
class="ectt-1000">BZIP</span>, <span 
class="ectt-1000">BZIP2</span>, <span 
class="ectt-1000">CDPATH</span>, <span 
class="ectt-1000">GREP_OPTIONS</span>, <span 
class="ectt-1000">GREP_COLOR </span>and <span 
class="ectt-1000">GLOBIGNORE </span>must not be
set.
</p>
<h4 class="subsectionHead"><span class="titlemark">11.1.1   </span> <a 
 id="x1-11900011.1.1"></a>USE and IUSE Handling</h4>
<!--l. 296--><p class="nopar" >This section discusses the handling of four variables:
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">IUSE</span> </dt><dd 
class="description">is the variable calculated from the <span 
class="ectt-1000">IUSE </span>values defined in ebuilds and eclasses.
     </dd><dt class="description">
<span 
class="ecbx-1000">IUSE_REFERENCEABLE</span> </dt><dd 
class="description">is a variable calculated from <span 
class="ectt-1000">IUSE </span>and a variety of other
     sources described below. It is purely a conceptual variable; it is not exported to the
     ebuild environment. Values in <span 
class="ectt-1000">IUSE_REFERENCEABLE </span>may legally be used in queries
     from other packages about an ebuild&#8217;s state (for example, for use dependencies).
     </dd><dt class="description">
<span 
class="ecbx-1000">IUSE_EFFECTIVE</span> </dt><dd 
class="description">is  another  conceptual,  unexported  variable.  Values  in  <span 
class="ectt-1000">IUSE_</span>
     <span 
class="ectt-1000">EFFECTIVE </span>are  those  which  an  ebuild  may  legally  use  in  queries  about  itself  (for
     example, for the <span 
class="ectt-1000">use </span>function, and for use in dependency specification conditional
     blocks).
     </dd><dt class="description">
<span 
class="ecbx-1000">USE</span> </dt><dd 
class="description">is  a  variable  calculated  by  the  package  manager  and  exported  to  the  ebuild
     environment.</dd></dl>
<!--l. 310--><p class="noindent" >In all cases, the values of <span 
class="ectt-1000">IUSE_REFERENCEABLE </span>and <span 
class="ectt-1000">IUSE_EFFECTIVE </span>are undefined during
metadata generation.
</p><!--l. 313--><p class="noindent" >For EAPIs listed in table&#x00A0;<a 
href="#x1-60001r2">5.2<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as not supporting profile defined <span 
class="ectt-1000">IUSE </span>injection, <span 
class="ectt-1000">IUSE_REFERENCEABLE </span>is
equal to the calculated <span 
class="ectt-1000">IUSE </span>value. For EAPIs where profile defined <span 
class="ectt-1000">IUSE </span>injection is supported,
<span 
class="ectt-1000">IUSE_REFERENCEABLE </span>is equal to <span 
class="ectt-1000">IUSE_EFFECTIVE</span>.
</p><!--l. 318--><p class="noindent" >For EAPIs listed in table&#x00A0;<a 
href="#x1-60001r2">5.2<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as not supporting profile defined <span 
class="ectt-1000">IUSE </span>injection, <span 
class="ectt-1000">IUSE_EFFECTIVE</span>
contains the following values:
</p><!--l. 322--><p class="noindent" >
     </p><ul>
     <li class="compactitem">All values in the calculated <span 
class="ectt-1000">IUSE </span>value.
     </li>
     <li class="compactitem">All possible values for the <span 
class="ectt-1000">ARCH </span>variable.
     </li>
     <li class="compactitem">All legal use flag names whose name starts with the lowercase equivalent of any value
     in the profile <span 
class="ectt-1000">USE_EXPAND </span>variable followed by an underscore.</li></ul>
                                                                               <!--l. 328--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">O</span><span 
class="small-caps">F</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span>-<span 
class="small-caps">I</span><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">J</span><span 
class="small-caps">E</span><span 
class="small-caps">C</span><span 
class="small-caps">T</span></span></span></p><!--l. 328--><p class="noindent" >For EAPIs listed in table&#x00A0;<a 
href="#x1-60001r2">5.2<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span 
class="ectt-1000">IUSE </span>injection, <span 
class="ectt-1000">IUSE_EFFECTIVE</span>
contains the following values:
                                                                            
                                                                            
</p><!--l. 332--><p class="noindent" >
     </p><ul>
     <li class="compactitem">All values in the calculated <span 
class="ectt-1000">IUSE </span>value.
     </li>
     <li class="compactitem">All values in the profile <span 
class="ectt-1000">IUSE_IMPLICIT </span>variable.
     </li>
     <li class="compactitem">All  values  in  the  profile  variable  named  <span 
class="ectt-1000">USE_EXPAND_VALUES_${v}</span>,  where  <span 
class="ectt-1000">${v} </span>is
     any value in the intersection of the profile <span 
class="ectt-1000">USE_EXPAND_UNPREFIXED </span>and <span 
class="ectt-1000">USE_EXPAND_</span>
     <span 
class="ectt-1000">IMPLICIT </span>variables.
     </li>
     <li class="compactitem">All values for <span 
class="ectt-1000">${lower_v}_${x}</span>, where <span 
class="ectt-1000">${x} </span>is all values in the profile variable named
     <span 
class="ectt-1000">USE_EXPAND_VALUES_${v}</span>, where <span 
class="ectt-1000">${v} </span>is any value in the intersection of the profile
     <span 
class="ectt-1000">USE_EXPAND </span>and <span 
class="ectt-1000">USE_EXPAND_IMPLICIT </span>variables and <span 
class="ectt-1000">${lower_v} </span>is the lowercase
     equivalent of <span 
class="ectt-1000">${v}</span>.</li></ul>
<!--l. 343--><p class="noindent" >The <span 
class="ectt-1000">USE </span>variable is set by the package manager. For each value in <span 
class="ectt-1000">IUSE_EFFECTIVE</span>, <span 
class="ectt-1000">USE </span>shall
contain that value if the flag is to be enabled for the ebuild in question, and shall not contain
that value if it is to be disabled. In EAPIs listed in table&#x00A0;<a 
href="#x1-60001r2">5.2<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as not supporting profile
defined <span 
class="ectt-1000">IUSE </span>injection, <span 
class="ectt-1000">USE </span>may contain other flag names that are not relevant for the
ebuild.
</p><!--l. 349--><p class="noindent" >For EAPIs listed in table&#x00A0;<a 
href="#x1-60001r2">5.2<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span 
class="ectt-1000">IUSE </span>injection, the variables named in
<span 
class="ectt-1000">USE_EXPAND </span>and <span 
class="ectt-1000">USE_EXPAND_UNPREFIXED </span>shall have their profile-provided values reduced to
contain only those values that are present in <span 
class="ectt-1000">IUSE_EFFECTIVE</span>.
</p><!--l. 354--><p class="noindent" >For EAPIs listed in table&#x00A0;<a 
href="#x1-60001r2">5.2<!--tex4ht:ref: tab:profile-iuse-injection-table --></a> as supporting profile defined <span 
class="ectt-1000">IUSE </span>injection, the package manager
must save the calculated value of <span 
class="ectt-1000">IUSE_EFFECTIVE </span>when installing a package. Details are beyond
the scope of this specification.
</p><!--l. 358--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">11.1.2   </span> <a 
 id="x1-12000011.1.2"></a><span 
class="ectt-1000">REPLACING_VERSIONS </span>and <span 
class="ectt-1000">REPLACED_BY_VERSION</span></h4>
                                                                               <!--l. 361--><p class="nopar" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">L</span><span 
class="small-caps">A</span><span 
class="small-caps">C</span><span 
class="small-caps">E</span>-<span 
class="small-caps">V</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span><span 
class="small-caps">S</span><span 
class="small-caps">I</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span>-<span 
class="small-caps">V</span><span 
class="small-caps">A</span><span 
class="small-caps">R</span><span 
class="small-caps">S</span></span></span></p><!--l. 361--><p class="noindent" >In EAPIs listed in table&#x00A0;<a 
href="#x1-118007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a> as supporting it, the <span 
class="ectt-1000">REPLACING_VERSIONS </span>variable shall be defined
in <span 
class="ectt-1000">pkg_preinst </span>and <span 
class="ectt-1000">pkg_postinst</span>. In addition, it <span 
class="ecti-1000">may </span>be defined in <span 
class="ectt-1000">pkg_pretend </span>and
<span 
class="ectt-1000">pkg_setup</span>, although ebuild authors should take care to handle binary package creation and
installation correctly when using it in these phases.
</p><!--l. 367--><p class="noindent" ><span 
class="ectt-1000">REPLACING_VERSIONS </span>is a list, not a single optional value, to handle pathological cases such as
installing <span 
class="ectt-1000">foo-2:2 </span>to replace <span 
class="ectt-1000">foo-2:1 </span>and <span 
class="ectt-1000">foo-3:2</span>.
</p><!--l. 370--><p class="noindent" >In EAPIs listed in table&#x00A0;<a 
href="#x1-118007r2">11.2<!--tex4ht:ref: tab:added-env-vars-table --></a> as supporting it, the <span 
class="ectt-1000">REPLACED_BY_VERSION </span>variable shall be defined
in <span 
class="ectt-1000">pkg_prerm </span>and <span 
class="ectt-1000">pkg_postrm</span>. It shall contain at most one value.
</p><!--l. 374--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">11.1.3   </span> <a 
 id="x1-12100011.1.3"></a>Offset-prefix variables <span 
class="ectt-1000">EPREFIX</span>, <span 
class="ectt-1000">EROOT </span>and <span 
class="ectt-1000">ED</span></h4>
<div class="table">
                                                                            
                                                                            
<!--l. 378--><p class="noindent" ><a 
 id="x1-121001r5"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.5: </span><span  
class="content">EAPIs supporting offset-prefix</span></div><!--tex4ht:label?: x1-121001r5 -->
<div class="tabular">
 <table id="TBL-27" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-27-1g"><col 
id="TBL-27-1" /><col 
id="TBL-27-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-27-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-27-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-27-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports offset-prefix?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-27-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-27-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-27-2-2"  
class="td11"> No                                </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-27-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-27-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-27-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-27-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-27-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-27-4-2"  
class="td11"> No                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-27-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-27-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-27-5-2"  
class="td11"> Yes                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-27-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-27-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-27-6-2"  
class="td11"> Yes                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-27-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-27-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-27-7-2"  
class="td11"> Yes                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-27-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-27-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
                                                                               <!--l. 395--><p class="nopar" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">O</span><span 
class="small-caps">F</span><span 
class="small-caps">F</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span><span 
class="small-caps">T</span>-<span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">I</span><span 
class="small-caps">X</span>-<span 
class="small-caps">V</span><span 
class="small-caps">A</span><span 
class="small-caps">R</span><span 
class="small-caps">S</span></span></span></p><!--l. 395--><p class="noindent" >Table&#x00A0;<a 
href="#x1-121001r5">11.5<!--tex4ht:ref: tab:offset-support-table --></a> lists the EAPIs which support offset-prefix installations. This support was initially
added in EAPI 3, in the form of three extra variables. Two of these, <span 
class="ectt-1000">EROOT </span>and <span 
class="ectt-1000">ED</span>, are convenience
variables using the variable <span 
class="ectt-1000">EPREFIX</span>. In EAPIs that do not support an offset-prefix, the
installation offset is hardwired to <span 
class="ectt-1000">/usr</span>. In offset-prefix supporting EAPIs the installation offset is
set as <span 
class="ectt-1000">${EPREFIX}/usr </span>and hence can be adjusted using the variable <span 
class="ectt-1000">EPREFIX</span>. Note that the
behaviour of offset-prefix aware and agnostic is the same when <span 
class="ectt-1000">EPREFIX </span>is set to the empty string
in offset-prefix aware EAPIs. The latter do have the variables <span 
class="ectt-1000">ED </span>and <span 
class="ectt-1000">EROOT </span>properly set,
though.
</p>
<h3 class="sectionHead"><span class="titlemark">11.2   </span> <a 
 id="x1-12200011.2"></a>The state of variables between functions</h3>
<!--l. 4--><p class="nopar" >Exported and default scope variables are saved between functions. A non-local variable set in a
function earlier in the call sequence must have its value preserved for later functions, including
functions executed as part of a later uninstall.
</p>
<!--l. 8--><p class="nopar" ><span class="paragraphHead"><a 
 id="x1-12300011.2"></a><span 
class="ecbx-1000">Note:</span></span>
<span 
class="ectt-1000">pkg_pretend </span>is <span 
class="ecti-1000">not </span>part of the normal call sequence, and does not take part in environment
saving.
</p><!--l. 11--><p class="noindent" >Variables that were exported must remain exported in later functions; variables with default
visibility may retain default visibility or be exported.
</p><!--l. 14--><p class="noindent" >Variables with special meanings to the package manager are excluded from this rule.
</p><!--l. 16--><p class="noindent" >Global variables must only contain invariant values (see&#x00A0;<a 
href="#x1-650007.1">7.1<!--tex4ht:ref: sec:metadata-invariance --></a>). If a global variable&#8217;s value is
invariant, it may have the value that would be generated at any given point in the build
sequence.
</p><!--l. 20--><p class="noindent" >This is demonstrated by code listing&#x00A0;<a 
href="#x1-123001r1">11.1<!--tex4ht:ref: lst:env-saving --></a>.
                                                                            
                                                                            
</p><!--l. 23--><p class="noindent" ><a 
 id="x1-123001r1"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Listing 11.1: </span><span  
class="content">Environment state between functions</span></div><!--tex4ht:label?: x1-123001r1 -->
<div class="verbatiminput">
<span 
class="ectt-1000">GLOBAL_VARIABLE="a"</span>
<span 
class="ectt-1000">&#x00A0;</span><br />
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">src_compile()</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">{</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;GLOBAL_VARIABLE="b"</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;DEFAULT_VARIABLE="c"</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;export</span><span 
class="ectt-1000">&#x00A0;EXPORTED_VARIABLE="d"</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;local</span><span 
class="ectt-1000">&#x00A0;LOCAL_VARIABLE="e"</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">}</span>
<span 
class="ectt-1000">&#x00A0;</span><br />
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">src_install(){</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;[[</span><span 
class="ectt-1000">&#x00A0;${GLOBAL_VARIABLE}</span><span 
class="ectt-1000">&#x00A0;==</span><span 
class="ectt-1000">&#x00A0;"a"</span><span 
class="ectt-1000">&#x00A0;]]</span><span 
class="ectt-1000">&#x00A0;\</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;||</span><span 
class="ectt-1000">&#x00A0;[[</span><span 
class="ectt-1000">&#x00A0;${GLOBAL_VARIABLE}</span><span 
class="ectt-1000">&#x00A0;==</span><span 
class="ectt-1000">&#x00A0;"b"</span><span 
class="ectt-1000">&#x00A0;]]</span><span 
class="ectt-1000">&#x00A0;\</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;||</span><span 
class="ectt-1000">&#x00A0;die</span><span 
class="ectt-1000">&#x00A0;"broken</span><span 
class="ectt-1000">&#x00A0;env</span><span 
class="ectt-1000">&#x00A0;saving</span><span 
class="ectt-1000">&#x00A0;for</span><span 
class="ectt-1000">&#x00A0;globals"</span>
<span 
class="ectt-1000">&#x00A0;</span><br />
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;[[</span><span 
class="ectt-1000">&#x00A0;${DEFAULT_VARIABLE}</span><span 
class="ectt-1000">&#x00A0;==</span><span 
class="ectt-1000">&#x00A0;"c"</span><span 
class="ectt-1000">&#x00A0;]]</span><span 
class="ectt-1000">&#x00A0;\</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;||</span><span 
class="ectt-1000">&#x00A0;die</span><span 
class="ectt-1000">&#x00A0;"broken</span><span 
class="ectt-1000">&#x00A0;env</span><span 
class="ectt-1000">&#x00A0;saving</span><span 
class="ectt-1000">&#x00A0;for</span><span 
class="ectt-1000">&#x00A0;default"</span>
<span 
class="ectt-1000">&#x00A0;</span><br />
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;[[</span><span 
class="ectt-1000">&#x00A0;${EXPORTED_VARIABLE}</span><span 
class="ectt-1000">&#x00A0;==</span><span 
class="ectt-1000">&#x00A0;"d"</span><span 
class="ectt-1000">&#x00A0;]]</span><span 
class="ectt-1000">&#x00A0;\</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;||</span><span 
class="ectt-1000">&#x00A0;die</span><span 
class="ectt-1000">&#x00A0;"broken</span><span 
class="ectt-1000">&#x00A0;env</span><span 
class="ectt-1000">&#x00A0;saving</span><span 
class="ectt-1000">&#x00A0;for</span><span 
class="ectt-1000">&#x00A0;exported"</span>
<span 
class="ectt-1000">&#x00A0;</span><br />
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;[[</span><span 
class="ectt-1000">&#x00A0;$(printenv</span><span 
class="ectt-1000">&#x00A0;EXPORTED_VARIABLE</span><span 
class="ectt-1000">&#x00A0;)</span><span 
class="ectt-1000">&#x00A0;==</span><span 
class="ectt-1000">&#x00A0;"d"</span><span 
class="ectt-1000">&#x00A0;]]</span><span 
class="ectt-1000">&#x00A0;\</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;||</span><span 
class="ectt-1000">&#x00A0;die</span><span 
class="ectt-1000">&#x00A0;"broken</span><span 
class="ectt-1000">&#x00A0;env</span><span 
class="ectt-1000">&#x00A0;saving</span><span 
class="ectt-1000">&#x00A0;for</span><span 
class="ectt-1000">&#x00A0;exported"</span>
<span 
class="ectt-1000">&#x00A0;</span><br />
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;[[</span><span 
class="ectt-1000">&#x00A0;-z</span><span 
class="ectt-1000">&#x00A0;${LOCAL_VARIABLE}</span><span 
class="ectt-1000">&#x00A0;]]</span><span 
class="ectt-1000">&#x00A0;\</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;||</span><span 
class="ectt-1000">&#x00A0;die</span><span 
class="ectt-1000">&#x00A0;"broken</span><span 
class="ectt-1000">&#x00A0;env</span><span 
class="ectt-1000">&#x00A0;saving</span><span 
class="ectt-1000">&#x00A0;for</span><span 
class="ectt-1000">&#x00A0;locals"</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">}</span>
</div>
                                                                            
                                                                            
</div><hr class="endfloat" />
<h3 class="sectionHead"><span class="titlemark">11.3   </span> <a 
 id="x1-12400011.3"></a>Available commands</h3>
<!--l. 4--><p class="nopar" >This section documents the commands available to an ebuild. Unless otherwise specified, they may
be aliases, shell functions, or executables in the ebuild&#8217;s <span 
class="ectt-1000">PATH</span>.
</p><!--l. 7--><p class="noindent" >When an ebuild is being sourced for metadata querying rather than for a build (that is to say,
when none of the <span 
class="ectt-1000">src_ </span>or <span 
class="ectt-1000">pkg_ </span>functions are to be called), no external command may be executed.
The package manager may take steps to enforce this.
</p><!--l. 11--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">11.3.1   </span> <a 
 id="x1-12500011.3.1"></a>System commands</h4>
<!--l. 13--><p class="nopar" >Any ebuild not listed in the system set for the active profile(s) may assume the presence of every
command that is always provided by the system set for that profile. However, it must target the
lowest common denominator of all systems on which it might be installed&#8212;in most
cases this means that the only packages that can be assumed to be present are those
listed in the <span 
class="ectt-1000">base </span>profile or equivalent, which is inherited by all available profiles. If an
ebuild requires any applications not provided by the system profile, or that are provided
conditionally based on USE flags, appropriate dependencies must be used to ensure their
presence.
</p><!--l. 21--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.1.1   </span> <a 
 id="x1-12600011.3.1.1"></a>Guaranteed system commands</h5>
<!--l. 24--><p class="nopar" >The following commands must always be available in the ebuild environment:
     </p><ul>
     <li class="compactitem">All builtin commands in GNU bash, version 3.2<span class="footnote-mark"><a 
href="pms7.html#fn5x12"><sup class="textsuperscript">5</sup></a></span><a 
 id="x1-126001f5"></a> .
     </li>
     <li class="compactitem"><span 
class="ectt-1000">sed </span>must be available, and must support all forms of invocations valid for GNU sed
     version 4 or later.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">patch </span>must be available, and must support all inputs valid for GNU patch.
     </li>
     <li class="compactitem"> <!--l. 32--><p class="noindent" >
                                                                                                                    </p><!--l. 32--><p class="noindent" >
                                                                                                                    <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">G</span><span 
class="small-caps">N</span><span 
class="small-caps">U</span>-<span 
class="small-caps">F</span><span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">D</span></span></span> <span 
class="ectt-1000">find </span>and <span 
class="ectt-1000">xargs </span>must be available, and must support all forms of invocations valid
     for GNU findutils version 4.4 or later. Only for EAPIs listed in table&#x00A0;<a 
href="#x1-126002r6">11.6<!--tex4ht:ref: tab:system-commands-table --></a> as requiring
     GNU find.</p></li></ul>
<div class="table">
                                                                            
                                                                            
<!--l. 38--><p class="noindent" ><a 
 id="x1-126002r6"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.6: </span><span  
class="content"><span 
class="ectt-1000">find </span>implementation for EAPIs</span></div><!--tex4ht:label?: x1-126002r6 -->
<div class="tabular">
 <table id="TBL-28" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-28-1g"><col 
id="TBL-28-1" /><col 
id="TBL-28-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-28-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-28-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-28-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">GNU </span><span 
class="ectt-1000">find</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-28-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-28-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-28-2-2"  
class="td11"> Undefined      </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-28-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-28-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-28-3-2"  
class="td11"> Undefined</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-28-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-28-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-28-4-2"  
class="td11"> Undefined      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-28-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-28-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-28-5-2"  
class="td11"> Undefined      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-28-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-28-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-28-6-2"  
class="td11"> Undefined      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-28-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-28-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-28-7-2"  
class="td11"> Yes              </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-28-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-28-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">11.3.2   </span> <a 
 id="x1-12700011.3.2"></a>Commands provided by package dependencies</h4>
<!--l. 56--><p class="nopar" >In some cases a package&#8217;s build process will require the availability of executables not provided by
the core system, a common example being autotools. The availability of commands provided by the
particular types of dependencies is explained in section&#x00A0;<a 
href="#x1-750008.1">8.1<!--tex4ht:ref: sec:dependency-classes --></a>.
</p><!--l. 60--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">11.3.3   </span> <a 
 id="x1-12800011.3.3"></a>Ebuild-specific Commands</h4>
<!--l. 3--><p class="nopar" >The following commands will always be available in the ebuild environment, provided by the
package manager. Except where otherwise noted, they may be internal (shell functions or aliases)
or external commands available in <span 
class="ectt-1000">PATH</span>; where this is not specified, ebuilds may not rely upon
either behaviour.
</p><!--l. 8--><p class="noindent" >Unless otherwise noted, any output of these commands ends with a newline.
</p><!--l. 10--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.1   </span> <a 
 id="x1-12900011.3.3.1"></a>Failure behaviour and related commands</h5>
                                                                               <!--l. 13--><p class="nopar" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">I</span><span 
class="small-caps">E</span>-<span 
class="small-caps">O</span><span 
class="small-caps">N</span>-<span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">U</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span></span></span></p><!--l. 13--><p class="noindent" >Where a command is listed as having EAPI dependent failure behaviour, a failure shall either
result in a non-zero exit status or abort the build process, as determined by table&#x00A0;<a 
href="#x1-129001r7">11.7<!--tex4ht:ref: tab:commands-die-table --></a>.
</p><!--l. 17--><p class="noindent" >The following commands affect this behaviour:
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">nonfatal</span> </dt><dd 
class="description"> <!--l. 19--><p class="noindent" >
                                                                                                </p><!--l. 19--><p class="noindent" >
                                                                                                <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">N</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">T</span><span 
class="small-caps">A</span><span 
class="small-caps">L</span></span></span> Executes the remainder of its arguments as a command, preserving the exit status.
     If this results in a command being called that would normally abort the build process
     due to a failure (but not due to an explicit <span 
class="ectt-1000">die </span>or <span 
class="ectt-1000">assert </span>call), instead a non-zero exit
     status shall be returned. Only in EAPIs listed in table&#x00A0;<a 
href="#x1-129001r7">11.7<!--tex4ht:ref: tab:commands-die-table --></a> as supporting <span 
class="ectt-1000">nonfatal</span>.</p></dd></dl>
<div class="table">
                                                                            
                                                                            
<!--l. 27--><p class="noindent" ><a 
 id="x1-129001r7"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.7: </span><span  
class="content">EAPI Command Failure Behaviour</span></div><!--tex4ht:label?: x1-129001r7 -->
<div class="tabular">
 <table id="TBL-29" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-29-1g"><col 
id="TBL-29-1" /><col 
id="TBL-29-2" /><col 
id="TBL-29-3" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-29-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-29-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-29-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Command failure behaviour</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-29-1-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">nonfatal</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-29-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-29-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-2-2"  
class="td11"> Non-zero exit                          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-2-3"  
class="td11"> No                           </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-29-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-29-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-3-2"  
class="td11"> Non-zero exit </td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-3-3"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-29-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-29-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-4-2"  
class="td11"> Non-zero exit                          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-4-3"  
class="td11"> No                           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-29-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-29-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-5-2"  
class="td11"> Non-zero exit                          </td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-5-3"  
class="td11"> No                           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-29-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-29-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-6-2"  
class="td11"> Aborts                                   </td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-6-3"  
class="td11"> Yes                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-29-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-29-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-7-2"  
class="td11"> Aborts                                   </td><td  style="white-space:nowrap; text-align:left;" id="TBL-29-7-3"  
class="td11"> Yes                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-29-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-29-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.2   </span> <a 
 id="x1-13000011.3.3.2"></a>Banned commands</h5>
                                                                               <!--l. 47--><p class="nopar" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">B</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span><span 
class="small-caps">N</span><span 
class="small-caps">E</span><span 
class="small-caps">D</span>-<span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">M</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span><span 
class="small-caps">D</span><span 
class="small-caps">S</span></span></span></p><!--l. 47--><p class="noindent" >Some commands are banned in some EAPIs. If a banned command is called, the package manager
must abort the build process indicating an error.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 51--><p class="noindent" ><a 
 id="x1-130001r8"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.8: </span><span  
class="content">Banned commands</span></div><!--tex4ht:label?: x1-130001r8 -->
<div class="tabular">
 <table id="TBL-30" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-30-1g"><col 
id="TBL-30-1" /><col 
id="TBL-30-2" /><col 
id="TBL-30-3" /><col 
id="TBL-30-4" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-30-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-30-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td colspan="3" style="white-space:nowrap; text-align:center;" id="TBL-30-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Command banned?</span></div></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-30-2-"><td  style="white-space:nowrap; text-align:center;" id="TBL-30-2-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"></div></td><td  style="white-space:nowrap; text-align:center;" id="TBL-30-2-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">dohard</span></div></td><td  style="white-space:nowrap; text-align:center;" id="TBL-30-2-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">dosed</span></div>

</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-30-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-30-3-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-3-2"  
class="td11"> No        </td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-3-3"  
class="td11"> No      </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-30-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-30-4-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-4-2"  
class="td11"> No </td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-4-3"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-30-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-30-5-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-5-2"  
class="td11"> No        </td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-5-3"  
class="td11"> No      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-30-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-30-6-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-6-2"  
class="td11"> No        </td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-6-3"  
class="td11"> No      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-30-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-30-7-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-7-2"  
class="td11"> Yes       </td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-7-3"  
class="td11"> Yes     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-30-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-30-8-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-8-2"  
class="td11"> Yes       </td><td  style="white-space:nowrap; text-align:left;" id="TBL-30-8-3"  
class="td11"> Yes     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-30-9-"><td  style="white-space:nowrap; text-align:left;" id="TBL-30-9-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.3   </span> <a 
 id="x1-13100011.3.3.3"></a>Sandbox commands</h5>
<!--l. 71--><p class="nopar" >These commands affect the behaviour of the sandbox. Each command takes a single directory as
argument. Ebuilds must not run any of these commands once the current phase function has
returned.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">addread</span> </dt><dd 
class="description">Add a directory to the permitted read list.
     </dd><dt class="description">
<span 
class="ecbx-1000">addwrite</span> </dt><dd 
class="description">Add a directory to the permitted write list.
     </dd><dt class="description">
<span 
class="ecbx-1000">addpredict</span> </dt><dd 
class="description">Add a directory to the predict list. Any write to a location in this list will be
     denied, but will not trigger access violation messages or abort the build process.
     </dd><dt class="description">
<span 
class="ecbx-1000">adddeny</span> </dt><dd 
class="description">Add a directory to the deny list.</dd></dl>
<!--l. 81--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.4   </span> <a 
 id="x1-13200011.3.3.4"></a>Package manager query commands</h5>
<!--l. 82--><p class="nopar" >These commands are used to extract information about the system. Ebuilds must not run any of
these commands in parallel with any other package manager command. Ebuilds must not run any
of these commands once the current phase function has returned.
                                                                               </p><!--l. 86--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">H</span><span 
class="small-caps">O</span><span 
class="small-caps">S</span><span 
class="small-caps">T</span>-<span 
class="small-caps">R</span><span 
class="small-caps">O</span><span 
class="small-caps">O</span><span 
class="small-caps">T</span>-<span 
class="small-caps">O</span><span 
class="small-caps">P</span><span 
class="small-caps">T</span><span 
class="small-caps">I</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span></span></span></p><!--l. 86--><p class="noindent" >In EAPIs listed in table&#x00A0;<a 
href="#x1-136023r15">11.15<!--tex4ht:ref: tab:foo-version-host-root-table --></a> as supporting option <span 
class="ectt-1000">--host-root</span>, this flag as the first argument
will cause the query to apply to the host root instead of <span 
class="ectt-1000">ROOT</span>.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">has_version</span> </dt><dd 
class="description">Takes exactly one package dependency specification as an argument. Returns
     true if a package matching the atom is installed in <span 
class="ectt-1000">ROOT</span>, and false otherwise.
     </dd><dt class="description">
<span 
class="ecbx-1000">best_version</span> </dt><dd 
class="description">Takes  exactly  one  package  dependency  specification  as  an  argument.  If
     a matching package is installed, prints the category, package name and version of
     the  highest  matching  version;  otherwise,  prints  an  empty  string.  The  exit  code  is
     unspecified.</dd></dl>
<!--l. 97--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.5   </span> <a 
 id="x1-13300011.3.3.5"></a>Output commands</h5>
<!--l. 98--><p class="nopar" >These commands display messages to the user. Unless otherwise stated, the entire argument list is
used as a message, with backslash-escaped characters interpreted as for the <span 
class="ectt-1000">echo -e </span>command of
bash, notably <span 
class="ectt-1000">\t </span>for a horizontal tab, <span 
class="ectt-1000">\n </span>for a new line, and <span 
class="ectt-1000">\\ </span>for a literal backslash. Ebuilds
must not run any of these commands once the current phase function has returned.
Unless otherwise noted, output may be sent to stdout, stderr or some other appropriate
facility.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">einfo</span> </dt><dd 
class="description">Displays an informational message.
                                                                            
                                                                            
     </dd><dt class="description">
<span 
class="ecbx-1000">einfon</span> </dt><dd 
class="description">Displays an informational message without a trailing newline.
     </dd><dt class="description">
<span 
class="ecbx-1000">elog</span> </dt><dd 
class="description">Displays an informational message of slightly higher importance. The package manager
     may choose to log <span 
class="ectt-1000">elog </span>messages by default where <span 
class="ectt-1000">einfo </span>messages are not, for example.
     </dd><dt class="description">
<span 
class="ecbx-1000">ewarn</span> </dt><dd 
class="description">Displays a warning message. Must not go to stdout.
     </dd><dt class="description">
<span 
class="ecbx-1000">eerror</span> </dt><dd 
class="description">Displays an error message. Must not go to stdout.
     </dd><dt class="description">
<span 
class="ecbx-1000">ebegin</span> </dt><dd 
class="description">Displays  an  informational  message.  Should  be  used  when  beginning  a  possibly
     lengthy process, and followed by a call to <span 
class="ectt-1000">eend</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">eend</span> </dt><dd 
class="description">Indicates  that  the  process  begun  with  an  <span 
class="ectt-1000">ebegin </span>message  has  completed.  Takes
     one fixed argument, which is a numeric return code, and an optional message in all
     subsequent arguments. If the first argument is 0, prints a success indicator; otherwise,
     prints the message followed by a failure indicator. Returns its first argument as exit
     status.</dd></dl>
<!--l. 120--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.6   </span> <a 
 id="x1-13400011.3.3.6"></a>Error commands</h5>
<!--l. 121--><p class="nopar" >These commands are used when an error is detected that will prevent the build process from
completing. Ebuilds must not run any of these commands once the current phase function has
returned.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">die</span> </dt><dd 
class="description">Displays a failure message provided in its first and only argument, and then aborts
     the build process. <span 
class="ectt-1000">die </span>is <span 
class="ecti-1000">not </span>guaranteed to work correctly if called from a subshell
     environment.
     </dd><dt class="description">
<span 
class="ecbx-1000">assert</span> </dt><dd 
class="description">Checks the value of the shell&#8217;s pipe status variable, and if any component is non-zero
     (indicating failure), calls <span 
class="ectt-1000">die </span>with its first argument as a failure message.</dd></dl>
<!--l. 131--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.7   </span> <a 
 id="x1-13500011.3.3.7"></a>Build commands</h5>
<!--l. 132--><p class="nopar" >These commands are used during the <span 
class="ectt-1000">src_compile </span>and <span 
class="ectt-1000">src_install </span>phases to run the package&#8217;s
build commands. Ebuilds must not run any of these commands once the current phase function has
returned.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">econf</span> </dt><dd 
class="description">Calls  the  program&#8217;s  <span 
class="ectt-1000">./configure </span>script.  This  is  designed  to  work  with  GNU
     Autoconf-generated scripts. Any additional parameters passed to <span 
class="ectt-1000">econf </span>are passed
     directly  to  <span 
class="ectt-1000">./configure</span>.  <span 
class="ectt-1000">econf </span>will  look  in  the  current  working  directory  for  a
     configure script unless the <span 
class="ectt-1000">ECONF_SOURCE </span>environment variable is set, in which case it
     is taken to be the directory containing it. <span 
class="ectt-1000">econf </span>must pass the following options to the
     configure script:
                                                                            
                                                                            
                                                                               <!--l. 144--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">E</span><span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">F</span>-<span 
class="small-caps">O</span><span 
class="small-caps">P</span><span 
class="small-caps">T</span><span 
class="small-caps">I</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span></span></span></p>
         <ul class="itemize1">
         <li class="itemize">--prefix must default to <span 
class="ectt-1000">${EPREFIX}/usr </span>unless overridden by <span 
class="ectt-1000">econf</span>&#8217;s caller.
         </li>
         <li class="itemize">--mandir must be <span 
class="ectt-1000">${EPREFIX}/usr/share/man</span>
         </li>
         <li class="itemize">--infodir must be <span 
class="ectt-1000">${EPREFIX}/usr/share/info</span>
         </li>
         <li class="itemize">--datadir must be <span 
class="ectt-1000">${EPREFIX}/usr/share</span>
         </li>
         <li class="itemize">--sysconfdir must be <span 
class="ectt-1000">${EPREFIX}/etc</span>
         </li>
         <li class="itemize">--localstatedir must be <span 
class="ectt-1000">${EPREFIX}/var/lib</span>
         </li>
         <li class="itemize">--host must be the value of the <span 
class="ectt-1000">CHOST </span>environment variable.
         </li>
         <li class="itemize">--libdir must be set according to Algorithm&#x00A0;<a 
href="#x1-135002r9">9<!--tex4ht:ref: alg:econf-libdir --></a>.
         </li>
         <li class="itemize">--disable-dependency-tracking, if the EAPI is listed in table&#x00A0;<a 
href="#x1-135001r9">11.9<!--tex4ht:ref: tab:econf-options-table --></a> as using it. This
         option will only be passed if the string <span 
class="ectt-1000">disable-dependency-tracking </span>occurs in
         the output of <span 
class="ectt-1000">configure --help</span>.
         </li>
         <li class="itemize">--disable-silent-rules, if the EAPI is listed in table&#x00A0;<a 
href="#x1-135001r9">11.9<!--tex4ht:ref: tab:econf-options-table --></a> as using it. This option
         will only be passed if the string <span 
class="ectt-1000">disable-silent-rules </span>occurs in the output of
         <span 
class="ectt-1000">configure --help</span>.</li></ul>
     <div class="table">
     <!--l. 162--><p class="noindent" ><a 
 id="x1-135001r9"></a></p><hr class="float" /><div class="float" 
>
 <div class="caption" 
><span class="id">Table&#x00A0;11.9: </span><span  
class="content">Extra <span 
class="ectt-1000">econf </span>arguments for EAPIs</span></div><!--tex4ht:label?: x1-135001r9 -->
     <div class="tabular">
 <table id="TBL-31" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-31-1g"><col 
id="TBL-31-1" /><col 
id="TBL-31-2" /><col 
id="TBL-31-3" /><col 
id="TBL-31-4" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-31-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-31-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div>  </td><td  style="white-space:nowrap; text-align:center;" id="TBL-31-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">--disable-dependency-tracking</span>?</div>  </td><td  style="white-space:nowrap; text-align:center;" id="TBL-31-1-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">--disable-silent-rules</span>?</div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-31-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-31-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-31-2-2"  
class="td11"> No                                             </td><td  style="white-space:nowrap; text-align:left;" id="TBL-31-2-3"  
class="td11"> No                              </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-31-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-31-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td> <td  style="white-space:nowrap; text-align:left;" id="TBL-31-3-2"  
class="td11"> No </td> <td  style="white-space:nowrap; text-align:left;" id="TBL-31-3-3"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-31-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-31-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-31-4-2"  
class="td11"> No                                             </td><td  style="white-space:nowrap; text-align:left;" id="TBL-31-4-3"  
class="td11"> No                              </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-31-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-31-5-1"  
class="td11"> <span 
class="ectt-1000">3 </span></td> <td  style="white-space:nowrap; text-align:left;" id="TBL-31-5-2"  
class="td11"> No </td> <td  style="white-space:nowrap; text-align:left;" id="TBL-31-5-3"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-31-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-31-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-31-6-2"  
class="td11"> Yes                                            </td><td  style="white-space:nowrap; text-align:left;" id="TBL-31-6-3"  
class="td11"> No                              </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-31-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-31-7-1"  
class="td11"> <span 
class="ectt-1000">5 </span></td> <td  style="white-space:nowrap; text-align:left;" id="TBL-31-7-2"  
class="td11"> Yes </td> <td  style="white-space:nowrap; text-align:left;" id="TBL-31-7-3"  
class="td11"> Yes</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-31-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-31-8-1"  
class="td11">        </td></tr></table>
     </div> </div><hr class="endfloat" />
     </div>
     <!--l. 179--><p class="noindent" >Note that the <span 
class="ectt-1000">${EPREFIX} </span>component represents the same offset-prefix as described in
     Table&#x00A0;<a 
href="#x1-118001r1">11.1<!--tex4ht:ref: tab:defined_vars --></a>. It facilitates offset-prefix installations which is supported by EAPIs listed in
     Table&#x00A0;<a 
href="#x1-118009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a>. When no offset-prefix installation is in effect, <span 
class="ectt-1000">EPREFIX </span>becomes the empty string,
     making the behaviour of <span 
class="ectt-1000">econf </span>equal for both offset-prefix supporting and agnostic
     EAPIs.
     </p><!--l. 185--><p class="noindent" ><span 
class="ectt-1000">econf </span>must be implemented internally&#8212;that is, as a bash function and not an external
     script. Should any portion of it fail, it must abort the build using <span 
class="ectt-1000">die</span>, unless run using
     <span 
class="ectt-1000">nonfatal</span>, in which case it must return non-zero exit status.
</p>
     <div class="algorithm">
     <!--l. 190--><p class="noindent" ><a 
 id="x1-135002r9"></a></p><hr class="float" /><div class="float" 
>
 <div class="caption" 
><span class="id">Algorithm 9: </span><span  
class="content">econf --libdir logic</span></div><!--tex4ht:label?: x1-135002r9 -->
<div class="algorithmic">
                                                                            
                                                                            
<a 
 id="x1-135003r115"></a>
 <span class="ALCitem"><span class="ecrm-0800">&#x2007;1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let prefix=${EPREFIX}/usr <a 
 id="x1-135004r116"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;the caller specified --prefix=$p&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-135005r117"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   let prefix=$p
   </span><a 
 id="x1-135006r118"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span><a 
 id="x1-135007r119"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> let libdir= <a 
 id="x1-135008r120"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;the ABI environment variable is set&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-135009r121"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   let libvar=LIBDIR_$ABI <a 
 id="x1-135010r122"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">if</span>&#x00A0;the environment variable named by libvar is set&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-135011r123"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:24.9939pt;">&nbsp;</span>     let libdir=the value of the variable named by libvar
     </span><a 
 id="x1-135012r124"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
   </span><a 
 id="x1-135013r125"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span><a 
 id="x1-135014r126"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;libdir is non-empty&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-135015r127"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   pass --libdir=$prefix/$libdir to configure
   </span><a 
 id="x1-135016r128"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span>
     </div> </div><hr class="endfloat" />
     </div>
     </dd><dt class="description">
<span 
class="ecbx-1000">emake</span> </dt><dd 
class="description">Calls the <span 
class="ectt-1000">$MAKE </span>program, or GNU make if the <span 
class="ectt-1000">MAKE </span>variable is unset. Any arguments given
     are passed directly to the make command, as are the user&#8217;s chosen <span 
class="ectt-1000">MAKEOPTS</span>. Arguments
     given to <span 
class="ectt-1000">emake </span>override user configuration. See also section&#x00A0;<a 
href="#x1-12600011.3.1.1">11.3.1.1<!--tex4ht:ref: sec:guaranteed-system-commands --></a>. <span 
class="ectt-1000">emake </span>must be an
     external program and cannot be a function or alias&#8212;it must be callable from e. g.&#x00A0;<span 
class="ectt-1000">xargs</span>.
     Failure behaviour is EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">einstall</span> </dt><dd 
class="description">A shortcut for the command given in Listing&#x00A0;<a 
href="#x1-135017r2">11.2<!--tex4ht:ref: lst:einstall --></a>. Any arguments given to <span 
class="ectt-1000">einstall </span>are
     passed verbatim to <span 
class="ectt-1000">emake</span>, as shown. Failure behaviour is EAPI dependent as per
     section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     <!--l. 219--><p class="noindent" >The variable <span 
class="ectt-1000">ED </span>is defined as in Table&#x00A0;<a 
href="#x1-118001r1">11.1<!--tex4ht:ref: tab:defined_vars --></a> and depends on the use of an offset-prefix.
     When such offset-prefix is absent, <span 
class="ectt-1000">ED </span>is equivalent to <span 
class="ectt-1000">D</span>. <span 
class="ectt-1000">ED </span>is always available in
     EAPIs that support offset-prefix installations as listed in Table&#x00A0;<a 
href="#x1-118009r4">11.4<!--tex4ht:ref: tab:offset-env-vars-table --></a>, hence EAPIs
     lacking offset-prefix support should use <span 
class="ectt-1000">D </span>instead of <span 
class="ectt-1000">ED </span>in the command given in
     Listing&#x00A0;<a 
href="#x1-135017r2">11.2<!--tex4ht:ref: lst:einstall --></a>. Variable <span 
class="ectt-1000">libdir </span>is an auxiliary local variable whose value is determined by
     Algorithm&#x00A0;<a 
href="#x1-136001r10">10<!--tex4ht:ref: alg:ebuild-libdir --></a>.
     </p><!--l. 226--><p class="noindent" ><a 
 id="x1-135017r2"></a></p><hr class="float" /><div class="float" 
>
 <div class="caption" 
><span class="id">Listing 11.2: </span><span  
class="content">einstall command</span></div><!--tex4ht:label?: x1-135017r2 -->
                                                                            
                                                                            
<div class="verbatim" id="verbatim-14">
emake&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;prefix="${ED}"/usr&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;datadir="${ED}"/usr/share&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;mandir="${ED}"/usr/share/man&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;infodir="${ED}"/usr/share/info&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;libdir="${ED}"/usr/${libdir}&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;localstatedir="${ED}"/var/lib&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;sysconfdir="${ED}"/etc&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;-j1&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;"$@"&#x00A0;\
&#x00A0;<br />&#x00A0;&#x00A0;&#x00A0;install
&#x00A0;<br />&#x00A0;&#x00A0;</div>
     <!--l. 240--><p class="nopar" ></p></div><hr class="endfloat" />
     </dd></dl>
<!--l. 245--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.8   </span> <a 
 id="x1-13600011.3.3.8"></a>Installation commands</h5>
<!--l. 246--><p class="nopar" >These commands are used to install files into the staging area, in cases where the package&#8217;s <span 
class="ectt-1000">make</span>
<span 
class="ectt-1000">install </span>target cannot be used or does not install all needed files. Except where otherwise stated,
all filenames created or modified are relative to the staging directory including the offset-prefix <span 
class="ectt-1000">ED</span>
in offset-prefix aware EAPIs, or just the staging directory <span 
class="ectt-1000">D </span>in offset-prefix agnostic EAPIs. These
commands must all be external programs and not bash functions or aliases&#8212;that is, they must be
callable from <span 
class="ectt-1000">xargs</span>. Ebuilds must not run any of these commands once the current phase function
has returned.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">dobin</span> </dt><dd 
class="description">Installs the given files into <span 
class="ectt-1000">DESTTREE/bin</span>, where <span 
class="ectt-1000">DESTTREE </span>defaults to <span 
class="ectt-1000">/usr</span>. Gives
     the files mode <span 
class="ectt-1000">0755 </span>and transfers file ownership to the superuser or its equivalent on
     the system or installation at hand. For instance on Gentoo Linux in a non-offset-prefix
     installation this ownership is <span 
class="ectt-1000">root:root</span>, while on an offset-prefix aware installation
     this may be <span 
class="ectt-1000">joe:users</span>. Failure behaviour is EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">doconfd</span> </dt><dd 
class="description">Installs the given config files into <span 
class="ectt-1000">/etc/conf.d/</span>, by default with file mode <span 
class="ectt-1000">0644</span>.
     This can be overridden by setting <span 
class="ectt-1000">INSOPTIONS </span>with the <span 
class="ectt-1000">insopts </span>function. Failure
     behaviour is EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">dodir</span> </dt><dd 
class="description">Creates the given directories, by default with file mode <span 
class="ectt-1000">0755</span>. This can be overridden
     by  setting  <span 
class="ectt-1000">DIROPTIONS </span>with  the  <span 
class="ectt-1000">diropts </span>function.  Failure  behaviour  is  EAPI
     dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">dodoc</span> </dt><dd 
class="description"> <!--l. 272--><p class="noindent" >
                                                                                                   </p><!--l. 272--><p class="noindent" >
                                                                                                   <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">C</span></span></span> Installs the given files into a subdirectory under <span 
class="ectt-1000">/usr/share/doc/${PF}/ </span>with file
     mode <span 
class="ectt-1000">0644</span>. The subdirectory is set by the most recent call to <span 
class="ectt-1000">docinto</span>. If <span 
class="ectt-1000">docinto</span>
     has not yet been called, instead installs to the directory <span 
class="ectt-1000">/usr/share/doc/${PF}/</span>. For
     EAPIs listed in table&#x00A0;<a 
href="#x1-136018r10">11.10<!--tex4ht:ref: tab:dodoc-table --></a> as supporting <span 
class="ectt-1000">-r</span>, if the first argument is <span 
class="ectt-1000">-r</span>, any subsequent
     arguments that are directories are installed recursively to the appropriate location; in
     any other case, it is an error for a directory to be specified. Failure behaviour is EAPI
     dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
                                                                            
                                                                            
     </p></dd><dt class="description">
<span 
class="ecbx-1000">doenvd</span> </dt><dd 
class="description">Installs the given environment files into <span 
class="ectt-1000">/etc/env.d/</span>, by default with file mode
     <span 
class="ectt-1000">0644</span>. This can be overridden by setting <span 
class="ectt-1000">INSOPTIONS </span>with the <span 
class="ectt-1000">insopts </span>function. Failure
     behaviour is EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">doexe</span> </dt><dd 
class="description">Installs the given files into the directory specified by the most recent <span 
class="ectt-1000">exeinto </span>call,
     by default with file mode <span 
class="ectt-1000">0755</span>. This can be overridden by setting <span 
class="ectt-1000">EXEOPTIONS </span>with the
     <span 
class="ectt-1000">exeopts </span>function. If <span 
class="ectt-1000">exeinto </span>has not yet been called, behaviour is undefined. Failure
     behaviour is EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">dohard</span> </dt><dd 
class="description">Takes two parameters. Creates a hardlink from the second to the first. In EAPIs
     listed in table&#x00A0;<a 
href="#x1-130001r8">11.8<!--tex4ht:ref: tab:banned-commands-table --></a>, this command is banned as per section&#x00A0;<a 
href="#x1-13000011.3.3.2">11.3.3.2<!--tex4ht:ref: sec:banned-commands --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">doheader</span> </dt><dd 
class="description"> <!--l. 293--><p class="noindent" >
                                                                                              </p><!--l. 293--><p class="noindent" >
                                                                                              <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">H</span><span 
class="small-caps">E</span><span 
class="small-caps">A</span><span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span></span></span> Installs the given header files into <span 
class="ectt-1000">/usr/include/</span>, by default with file mode
     <span 
class="ectt-1000">0644</span>. This can be overridden by setting <span 
class="ectt-1000">INSOPTIONS </span>with the <span 
class="ectt-1000">insopts </span>function. If
     the first argument is <span 
class="ectt-1000">-r</span>, then operates recursively, descending into any directories
     given. Only available in EAPIs listed in table&#x00A0;<a 
href="#x1-136019r11">11.11<!--tex4ht:ref: tab:doheader-table --></a> as supporting <span 
class="ectt-1000">doheader</span>. Failure
     behaviour is EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </p></dd><dt class="description">
<span 
class="ecbx-1000">dohtml</span> </dt><dd 
class="description">Installs the given HTML files into a subdirectory under <span 
class="ectt-1000">/usr/share/doc/$PF/</span>. The
     subdirectory is <span 
class="ectt-1000">html </span>by default, but this can be overridden by setting the <span 
class="ectt-1000">DOCDESTTREE</span>
     variable with the <span 
class="ectt-1000">docinto </span>function. Files to be installed automatically are determined by
     extension and the default extensions are <span 
class="ectt-1000">css</span>, <span 
class="ectt-1000">gif</span>, <span 
class="ectt-1000">htm</span>, <span 
class="ectt-1000">html</span>, <span 
class="ectt-1000">jpeg</span>, <span 
class="ectt-1000">jpg</span>, <span 
class="ectt-1000">js </span>and <span 
class="ectt-1000">png</span>. These
     default extensions can be extended or reduced (see below). The options that can be passed to
     <span 
class="ectt-1000">dohtml </span>are as follows:
         <dl class="description"><dt class="description">
      </dt><dd 
class="description"><span 
class="ectt-1000">-r </span>&#8212; enables recursion into directories.
         </dd><dt class="description">
      </dt><dd 
class="description"><span 
class="ectt-1000">-V </span>&#8212; enables verbosity.
         </dd><dt class="description">
      </dt><dd 
class="description"><span 
class="ectt-1000">-A </span>&#8212; adds file type extensions to the default list.
         </dd><dt class="description">
      </dt><dd 
class="description"><span 
class="ectt-1000">-a </span>&#8212; sets file type extensions to only those specified.
         </dd><dt class="description">
      </dt><dd 
class="description"><span 
class="ectt-1000">-f </span>&#8212; list of files that are able to be installed.
         </dd><dt class="description">
      </dt><dd 
class="description"><span 
class="ectt-1000">-x </span>&#8212; list of directories that files will not be installed from (only used in conjunction
         with <span 
class="ectt-1000">-r</span>).
         </dd><dt class="description">
      </dt><dd 
class="description"><span 
class="ectt-1000">-p </span>&#8212; sets a document prefix for installed files, not to be confused with the global
         offset-prefix.</dd></dl>
     <!--l. 318--><p class="noindent" >Failure behaviour is EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </p><!--l. 320--><p class="noindent" >It is undefined whether a failure shall occur if <span 
class="ectt-1000">-r </span>is not specified and a directory is
     encountered. Ebuilds must not rely upon any particular behaviour.
     </p></dd><dt class="description">
<span 
class="ecbx-1000">doinfo</span> </dt><dd 
class="description">Installs a GNU Info file into the <span 
class="ectt-1000">/usr/share/info </span>area with file mode <span 
class="ectt-1000">0644</span>. Failure
     behaviour is EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">doinitd</span> </dt><dd 
class="description">Installs the given initscript files into <span 
class="ectt-1000">/etc/init.d</span>, by default with file mode <span 
class="ectt-1000">0755</span>. This
     can be overridden by setting <span 
class="ectt-1000">EXEOPTIONS </span>with the <span 
class="ectt-1000">exeopts </span>function. Failure behaviour is
     EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
                                                                            
                                                                            
     </dd><dt class="description">
<span 
class="ecbx-1000">doins</span> </dt><dd 
class="description"> <!--l. 330--><p class="noindent" >
                                                                                                    </p><!--l. 330--><p class="noindent" >
                                                                                                    <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span></span></span> Takes any number of files as arguments and installs them into <span 
class="ectt-1000">INSDESTTREE</span>, by default
     with file mode <span 
class="ectt-1000">0644</span>. This can be overridden by setting <span 
class="ectt-1000">INSOPTIONS </span>with the <span 
class="ectt-1000">insopts</span>
     function. If the first argument is <span 
class="ectt-1000">-r</span>, then operates recursively, descending into any directories
     given. For EAPIs listed in table&#x00A0;<a 
href="#x1-136020r12">11.12<!--tex4ht:ref: tab:doins-table --></a>, <span 
class="ectt-1000">doins </span>must install symlinks as symlinks; for other
     EAPIs, behaviour is undefined if any symlink is encountered. Failure behaviour is EAPI
     dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </p></dd><dt class="description">
<span 
class="ecbx-1000">dolib</span> </dt><dd 
class="description">For each argument, installs it into the appropriate library subdirectory under <span 
class="ectt-1000">DESTTREE</span>, as
     determined by Algorithm&#x00A0;<a 
href="#x1-136001r10">10<!--tex4ht:ref: alg:ebuild-libdir --></a>. The file mode is <span 
class="ectt-1000">0644 </span>by default. This can be overridden by
     setting <span 
class="ectt-1000">LIBOPTIONS </span>with the <span 
class="ectt-1000">libopts </span>function. Any symlinks are installed into the same
     directory as relative links to their original target. Failure behaviour is EAPI dependent as per
     section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">dolib.so</span> </dt><dd 
class="description">As for dolib except each file is installed with mode <span 
class="ectt-1000">0755</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">dolib.a</span> </dt><dd 
class="description">As for dolib except each file is installed with mode <span 
class="ectt-1000">0644</span>.
     <div class="algorithm">
     <!--l. 349--><p class="noindent" ><a 
 id="x1-136001r10"></a></p><hr class="float" /><div class="float" 
>
 <div class="caption" 
><span class="id">Algorithm 10: </span><span  
class="content">Determining the library directory</span></div><!--tex4ht:label?: x1-136001r10 -->
<div class="algorithmic">
<a 
 id="x1-136002r129"></a>
 <span class="ALCitem"><span class="ecrm-0800">&#x2007;1:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;CONF_LIBDIR_OVERRIDE is set in the environment&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-136003r130"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;2:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   return CONF_LIBDIR_OVERRIDE
   </span><a 
 id="x1-136004r131"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;3:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span><a 
 id="x1-136005r132"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;4:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;CONF_LIBDIR is set in the environment&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-136006r133"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;5:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   let LIBDIR_default=CONF_LIBDIR
   </span><a 
 id="x1-136007r134"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;6:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">else</span><span class="else-body">
<a 
 id="x1-136008r135"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;7:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   let LIBDIR_default=&#8220;lib&#8221;
   </span><a 
 id="x1-136009r136"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;8:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span><a 
 id="x1-136010r137"></a>
 <br /><span class="ALCitem"><span class="ecrm-0800">&#x2007;9:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">if</span>&#x00A0;ABI is set in the environment&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-136011r138"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">10:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   let abi=ABI
   </span><a 
 id="x1-136012r139"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">11:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">else</span>&#x00A0;<span 
class="ecbx-1000">if</span>&#x00A0;DEFAULT_ABI is set in the environment&#x00A0;<span 
class="ecbx-1000">then</span><span class="if-body">
<a 
 id="x1-136013r140"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">12:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   let abi=DEFAULT_ABI
   </span><a 
 id="x1-136014r141"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">13:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">else</span><span class="else-body">
<a 
 id="x1-136015r142"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">14:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:14.99634pt;">&nbsp;</span>   let abi=&#8220;default&#8221;
   </span><a 
 id="x1-136016r143"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">15:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> <span 
class="ecbx-1000">end</span>&#x00A0;<span 
class="ecbx-1000">if</span><a 
 id="x1-136017r144"></a>
<br /><span class="ALCitem"><span 
class="ecrm-0800">16:</span></span><span style="display:-moz-inline-box;display:inline-block;height:1px;width:4.99878pt;">&nbsp;</span> return the value of LIBDIR_$abi
     </div> </div><hr class="endfloat" />
     </div>
     </dd><dt class="description">
<span 
class="ecbx-1000">doman</span> </dt><dd 
class="description">Installs a man page into the appropriate subdirectory of <span 
class="ectt-1000">/usr/share/man </span>depending upon
                                                                            
                                                                            
     its apparent section suffix (e. g.&#x00A0;<span 
class="ectt-1000">foo.1 </span>goes to <span 
class="ectt-1000">/usr/share/man/man1/foo.1</span>) with file mode
     <span 
class="ectt-1000">0644</span>.
                                                                               <!--l. 374--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span>-<span 
class="small-caps">L</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span><span 
class="small-caps">G</span><span 
class="small-caps">S</span></span></span></p><!--l. 374--><p class="noindent" >In EAPIs listed in table&#x00A0;<a 
href="#x1-136021r13">11.13<!--tex4ht:ref: tab:doman-table --></a> as supporting language detection by filename, a man page
     with name of the form <span 
class="ectt-1000">foo.</span><span 
class="ecti-1000">lang</span><span 
class="ectt-1000">.1 </span>shall go to <span 
class="ectt-1000">/usr/share/man/</span><span 
class="ecti-1000">lang</span><span 
class="ectt-1000">/man1/foo.1</span>, where
     <span 
class="ecti-1000">lang </span>refers to a pair of lower-case ASCII letters optionally followed by an underscore and a
     pair of upper-case ASCII letters. Failure behaviour is EAPI dependent as per
     section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </p><!--l. 380--><p class="noindent" >With option <span 
class="ectt-1000">-i18n=</span><span 
class="ecti-1000">lang</span>, a man page shall be installed into an appropriate subdirectory of
     <span 
class="ectt-1000">/usr/share/man/</span><span 
class="ecti-1000">lang </span>(e. g.&#x00A0;<span 
class="ectt-1000">/usr/share/man/</span><span 
class="ecti-1000">lang</span><span 
class="ectt-1000">/man1/foo.pl.1 </span>would be the destination
     for <span 
class="ectt-1000">foo.pl.1</span>). The <span 
class="ecti-1000">lang </span>subdirectory level is skipped if <span 
class="ecti-1000">lang </span>is the empty string. In EAPIs
     specified by table&#x00A0;<a 
href="#x1-136021r13">11.13<!--tex4ht:ref: tab:doman-table --></a>, the <span 
class="ectt-1000">-i18n </span>option takes precedence over the language code in the
     filename.
     </p></dd><dt class="description">
<span 
class="ecbx-1000">domo</span> </dt><dd 
class="description">Installs a <span 
class="ectt-1000">.mo </span>file with file mode <span 
class="ectt-1000">0644 </span>into the appropriate subdirectory of
     <span 
class="ectt-1000">DESTTREE/share/locale</span>, generated by taking the basename of the file, removing the
     <span 
class="ectt-1000">.* </span>suffix, and appending <span 
class="ectt-1000">/LC_MESSAGES</span>. The name of the installed files is the
     package name with <span 
class="ectt-1000">.mo </span>appended. Failure behaviour is EAPI dependent as per
     section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">dosbin</span> </dt><dd 
class="description">As <span 
class="ectt-1000">dobin</span>, but installs to <span 
class="ectt-1000">DESTTREE/sbin</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">dosym</span> </dt><dd 
class="description">Creates a symbolic link named as for its second parameter, pointing to the first. If the
     directory containing the new link does not exist, creates it. Failure behaviour is EAPI
     dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">fowners</span> </dt><dd 
class="description">Acts as for <span 
class="ectt-1000">chown</span>, but takes paths relative to the image directory. Failure behaviour is
     EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">fperms</span> </dt><dd 
class="description">Acts as for <span 
class="ectt-1000">chmod</span>, but takes paths relative to the image directory. Failure behaviour is
     EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">newbin</span> </dt><dd 
class="description"> <!--l. 404--><p class="noindent" >
                                                                                                 </p><!--l. 404--><p class="noindent" >
                                                                                                 <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">N</span><span 
class="small-caps">E</span><span 
class="small-caps">W</span><span 
class="small-caps">F</span><span 
class="small-caps">O</span><span 
class="small-caps">O</span>-<span 
class="small-caps">S</span><span 
class="small-caps">T</span><span 
class="small-caps">D</span><span 
class="small-caps">I</span><span 
class="small-caps">N</span></span></span> As for <span 
class="ectt-1000">dobin</span>, but takes two parameters. The first is the file to install; the second is the
     new filename under which it will be installed. In EAPIs specified by table&#x00A0;<a 
href="#x1-136022r14">11.14<!--tex4ht:ref: tab:newfoo-stdin-table --></a>, standard
     input is read when the first parameter is <span 
class="ectt-1000">- </span>(a hyphen). In this case, it is an error if standard
     input is a terminal.
     </p></dd><dt class="description">
<span 
class="ecbx-1000">newconfd</span> </dt><dd 
class="description">As for <span 
class="ectt-1000">doconfd</span>, but takes two parameters as for <span 
class="ectt-1000">newbin</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">newdoc</span> </dt><dd 
class="description">As above, for <span 
class="ectt-1000">dodoc</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">newenvd</span> </dt><dd 
class="description">As above, for <span 
class="ectt-1000">doenvd</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">newexe</span> </dt><dd 
class="description">As above, for <span 
class="ectt-1000">doexe</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">newheader</span> </dt><dd 
class="description">As above, for <span 
class="ectt-1000">doheader</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">newinitd</span> </dt><dd 
class="description">As above, for <span 
class="ectt-1000">doinitd</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">newins</span> </dt><dd 
class="description">As above, for <span 
class="ectt-1000">doins</span>.
                                                                            
                                                                            
     </dd><dt class="description">
<span 
class="ecbx-1000">newlib.a</span> </dt><dd 
class="description">As above, for <span 
class="ectt-1000">dolib.a</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">newlib.so</span> </dt><dd 
class="description">As above, for <span 
class="ectt-1000">dolib.so</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">newman</span> </dt><dd 
class="description">As above, for <span 
class="ectt-1000">doman</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">newsbin</span> </dt><dd 
class="description">As above, for <span 
class="ectt-1000">dosbin</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">keepdir</span> </dt><dd 
class="description">Creates a directory as for <span 
class="ectt-1000">dodir</span>, and an empty file whose name starts with <span 
class="ectt-1000">.keep </span>in that
     directory to ensure that the directory does not get removed by the package manager
     should it be empty at any point. Failure behaviour is EAPI dependent as per
     section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd></dl>
<div class="table">
                                                                            
                                                                            
<!--l. 439--><p class="noindent" ><a 
 id="x1-136018r10"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.10: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">dodoc -r</span></span></div><!--tex4ht:label?: x1-136018r10 -->
<div class="tabular">
 <table id="TBL-32" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-32-1g"><col 
id="TBL-32-1" /><col 
id="TBL-32-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-32-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-32-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-32-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">dodoc -r</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-32-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-32-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-32-2-2"  
class="td11"> No                           </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-32-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-32-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-32-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-32-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-32-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-32-4-2"  
class="td11"> No                           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-32-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-32-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-32-5-2"  
class="td11"> No                           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-32-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-32-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-32-6-2"  
class="td11"> Yes                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-32-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-32-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-32-7-2"  
class="td11"> Yes                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-32-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-32-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 456--><p class="noindent" ><a 
 id="x1-136019r11"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.11: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">doheader </span>and <span 
class="ectt-1000">newheader</span></span></div><!--tex4ht:label?: x1-136019r11 -->
<div class="tabular">
 <table id="TBL-33" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-33-1g"><col 
id="TBL-33-1" /><col 
id="TBL-33-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-33-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-33-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-33-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">doheader </span><span 
class="ecbx-1000">and </span><span 
class="ectt-1000">newheader</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-33-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-33-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-33-2-2"  
class="td11"> No                                                 </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-33-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-33-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-33-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-33-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-33-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-33-4-2"  
class="td11"> No                                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-33-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-33-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-33-5-2"  
class="td11"> No                                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-33-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-33-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-33-6-2"  
class="td11"> No                                                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-33-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-33-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-33-7-2"  
class="td11"> Yes                                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-33-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-33-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 473--><p class="noindent" ><a 
 id="x1-136020r12"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.12: </span><span  
class="content">EAPIs supporting symlinks for <span 
class="ectt-1000">doins</span></span></div><!--tex4ht:label?: x1-136020r12 -->
<div class="tabular">
 <table id="TBL-34" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-34-1g"><col 
id="TBL-34-1" /><col 
id="TBL-34-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-34-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-34-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-34-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">doins </span><span 
class="ecbx-1000">supports symlinks?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-34-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-34-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-34-2-2"  
class="td11"> No                                    </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-34-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-34-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-34-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-34-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-34-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-34-4-2"  
class="td11"> No                                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-34-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-34-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-34-5-2"  
class="td11"> No                                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-34-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-34-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-34-6-2"  
class="td11"> Yes                                   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-34-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-34-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-34-7-2"  
class="td11"> Yes                                   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-34-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-34-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 490--><p class="noindent" ><a 
 id="x1-136021r13"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.13: </span><span  
class="content"><span 
class="ectt-1000">doman </span>language support options for EAPIs</span></div><!--tex4ht:label?: x1-136021r13 -->
<div class="tabular">
 <table id="TBL-35" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-35-1g"><col 
id="TBL-35-1" /><col 
id="TBL-35-2" /><col 
id="TBL-35-3" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-35-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-35-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-35-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Language detection by filename?</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-35-1-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Option </span><span 
class="ectt-1000">-i18n </span><span 
class="ecbx-1000">takes precedence?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-35-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-35-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-2-2"  
class="td11"> No                                               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-2-3"  
class="td11"> Not applicable                              </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-35-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-35-3-1"  
class="td11"> <span 
class="ectt-1000">1      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-3-2"  
class="td11"> No                                               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-3-3"  
class="td11"> Not applicable                              </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-35-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-35-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-4-2"  
class="td11"> Yes                                               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-4-3"  
class="td11"> No                                              </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-35-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-35-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-5-2"  
class="td11"> Yes                                               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-5-3"  
class="td11"> No                                              </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-35-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-35-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-6-2"  
class="td11"> Yes                                               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-6-3"  
class="td11"> Yes                                             </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-35-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-35-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-7-2"  
class="td11"> Yes                                               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-35-7-3"  
class="td11"> Yes                                             </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-35-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-35-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 509--><p class="noindent" ><a 
 id="x1-136022r14"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.14: </span><span  
class="content">EAPIs supporting stdin for <span 
class="ectt-1000">new* </span>commands</span></div><!--tex4ht:label?: x1-136022r14 -->
<div class="tabular">
 <table id="TBL-36" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-36-1g"><col 
id="TBL-36-1" /><col 
id="TBL-36-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-36-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-36-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-36-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">new* </span><span 
class="ecbx-1000">can read from stdin?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-36-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-36-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-36-2-2"  
class="td11"> No                                     </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-36-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-36-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-36-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-36-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-36-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-36-4-2"  
class="td11"> No                                     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-36-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-36-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-36-5-2"  
class="td11"> No                                     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-36-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-36-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-36-6-2"  
class="td11"> No                                     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-36-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-36-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-36-7-2"  
class="td11"> Yes                                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-36-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-36-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 526--><p class="noindent" ><a 
 id="x1-136023r15"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.15: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">--host-root </span>for <span 
class="ectt-1000">*_version </span>commands</span></div><!--tex4ht:label?: x1-136023r15 -->
<div class="tabular">
 <table id="TBL-37" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-37-1g"><col 
id="TBL-37-1" /><col 
id="TBL-37-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-37-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-37-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-37-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">*_version </span><span 
class="ecbx-1000">supports </span><span 
class="ectt-1000">--host-root</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-37-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-37-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-37-2-2"  
class="td11"> No                                               </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-37-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-37-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-37-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-37-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-37-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-37-4-2"  
class="td11"> No                                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-37-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-37-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-37-5-2"  
class="td11"> No                                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-37-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-37-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-37-6-2"  
class="td11"> No                                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-37-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-37-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-37-7-2"  
class="td11"> Yes                                              </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-37-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-37-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.9   </span> <a 
 id="x1-13700011.3.3.9"></a>Commands affecting install destinations</h5>
<!--l. 544--><p class="nopar" >The following commands are used to set the various destination trees, all relative to <span 
class="ectt-1000">${ED} </span>in
offset-prefix aware EAPIs and relative to <span 
class="ectt-1000">${D} </span>in offset-prefix agnostic EAPIs, used by the above
installation commands. They must be shell functions or aliases, due to the need to set variables
read by the above commands. Ebuilds must not run any of these commands once the current phase
function has returned.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">into</span> </dt><dd 
class="description">Sets the value of <span 
class="ectt-1000">DESTTREE </span>for future invocations of the above utilities. Creates the
     directory  under  <span 
class="ectt-1000">${ED} </span>in  offset-prefix  aware  EAPIs  or  under  <span 
class="ectt-1000">${D} </span>in  offset-prefix
     agnostic EAPIs, using <span 
class="ectt-1000">install -d </span>with no additional options, if it does not already
     exist. Failure behaviour is EAPI dependent as per section&#x00A0;<a 
href="#x1-12900011.3.3.1">11.3.3.1<!--tex4ht:ref: sec:failure-behaviour --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">insinto</span> </dt><dd 
class="description">Sets the value of  <span 
class="ectt-1000">INSDESTTREE </span>for future invocations of the above utilities. May
     create the directory, as specified for <span 
class="ectt-1000">into</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">exeinto</span> </dt><dd 
class="description">Sets the install path for <span 
class="ectt-1000">doexe </span>and <span 
class="ectt-1000">newexe</span>. May create the directory, as specified
     for <span 
class="ectt-1000">into</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">docinto</span> </dt><dd 
class="description">Sets the install subdirectory for <span 
class="ectt-1000">dodoc </span>et al. May create the directory, as specified
     for <span 
class="ectt-1000">into</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">insopts</span> </dt><dd 
class="description">Sets the options passed by <span 
class="ectt-1000">doins </span>et al. to the <span 
class="ectt-1000">install </span>command.
     </dd><dt class="description">
<span 
class="ecbx-1000">diropts</span> </dt><dd 
class="description">Sets the options passed by <span 
class="ectt-1000">dodir </span>et al. to the <span 
class="ectt-1000">install </span>command.
     </dd><dt class="description">
<span 
class="ecbx-1000">exeopts</span> </dt><dd 
class="description">Sets the options passed by <span 
class="ectt-1000">doexe </span>et al. to the <span 
class="ectt-1000">install </span>command.
     </dd><dt class="description">
<span 
class="ecbx-1000">libopts</span> </dt><dd 
class="description">Sets the options passed by <span 
class="ectt-1000">dolib </span>et al. to the <span 
class="ectt-1000">install </span>command.
     </dd></dl>
<!--l. 578--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.10   </span> <a 
 id="x1-13800011.3.3.10"></a>Commands affecting install compression</h5>
                                                                               <!--l. 580--><p class="nopar" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">S</span><span 
class="small-caps">S</span></span></span></p><!--l. 580--><p class="noindent" >In EAPIs listed in table&#x00A0;<a 
href="#x1-138001r16">11.16<!--tex4ht:ref: tab:compression-table --></a> as supporting controllable compression, the package manager may
optionally compress a subset of the files under the <span 
class="ectt-1000">ED </span>directory in offset-prefix aware EAPIs or the
<span 
class="ectt-1000">D </span>directory in offset-prefix agnostic EAPIs. To control which directories may or may not be
compressed, the package manager shall maintain two lists:
</p><!--l. 587--><p class="noindent" >
     </p><ul>
     <li class="compactitem">An  inclusion  list,  which  initially  contains  <span 
class="ectt-1000">/usr/share/doc</span>,  <span 
class="ectt-1000">/usr/share/info </span>and
     <span 
class="ectt-1000">/usr/share/man</span>.
                                                                            
                                                                            
     </li>
     <li class="compactitem">An exclusion list, which initially contains <span 
class="ectt-1000">/usr/share/doc/${PF}/html</span>.</li></ul>
<!--l. 592--><p class="noindent" >The optional compression shall be carried out after <span 
class="ectt-1000">src_install </span>has completed, and before the
execution of any subsequent phase function. For each item in the inclusion list, pretend it has the
value of the <span 
class="ectt-1000">ED </span>variable in offset-prefix aware EAPIs or the <span 
class="ectt-1000">D </span>variable in offset-prefix agnostic
EAPIs prepended, then:
</p><!--l. 598--><p class="noindent" >
     </p><ul>
     <li class="compactitem">If it is a directory, act as if every file or directory immediately under this directory
     were in the inclusion list.
     </li>
     <li class="compactitem">If the item is a file, it may be compressed unless it has been excluded as described
     below.
     </li>
     <li class="compactitem">If the item does not exist, it is ignored.</li></ul>
<!--l. 604--><p class="noindent" >Whether an item is to be excluded is determined as follows: For each item in the exclusion list,
pretend it has the value of the <span 
class="ectt-1000">ED </span>variable in offset-prefix aware EAPIs or the <span 
class="ectt-1000">D </span>variable in
offset-prefix agnostic EAPIs prepended, then:
</p><!--l. 609--><p class="noindent" >
     </p><ul>
     <li class="compactitem">If it is a directory, act as if every file or directory immediately under this directory
     were in the exclusion list.
     </li>
     <li class="compactitem">If the item is a file, it shall not be compressed.
     </li>
     <li class="compactitem">If the item does not exist, it is ignored.</li></ul>
<!--l. 615--><p class="noindent" >The package manager shall take appropriate steps to ensure that its compression mechanisms
behave sensibly even if an item is listed in the inclusion list multiple times, if an item is a symlink,
or if a file is already compressed.
</p><!--l. 619--><p class="noindent" >The following commands may be used in <span 
class="ectt-1000">src_install </span>to alter these lists. It is an error to call any
of these functions from any other phase.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">docompress</span> </dt><dd 
class="description">If  the  first  argument  is  <span 
class="ectt-1000">-x</span>,  add  each  of  its  subsequent  arguments  to  the
     exclusion list. Otherwise, add each argument to the inclusion list. Only available in
     EAPIs listed in table&#x00A0;<a 
href="#x1-138001r16">11.16<!--tex4ht:ref: tab:compression-table --></a> as supporting <span 
class="ectt-1000">docompress</span>.</dd></dl>
<div class="table">
                                                                            
                                                                            
<!--l. 629--><p class="noindent" ><a 
 id="x1-138001r16"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.16: </span><span  
class="content">EAPIs supporting controllable compression</span></div><!--tex4ht:label?: x1-138001r16 -->
<div class="tabular">
 <table id="TBL-38" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-38-1g"><col 
id="TBL-38-1" /><col 
id="TBL-38-2" /><col 
id="TBL-38-3" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-38-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-38-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-38-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports controllable compression?</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-38-1-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">docompress</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-38-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-38-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-2-2"  
class="td11"> No                                                    </td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-2-3"  
class="td11"> No                              </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-38-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-38-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-3-2"  
class="td11"> No </td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-3-3"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-38-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-38-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-4-2"  
class="td11"> No                                                    </td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-4-3"  
class="td11"> No                              </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-38-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-38-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-5-2"  
class="td11"> No                                                    </td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-5-3"  
class="td11"> No                              </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-38-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-38-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-6-2"  
class="td11"> Yes                                                   </td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-6-3"  
class="td11"> Yes                             </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-38-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-38-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-7-2"  
class="td11"> Yes                                                   </td><td  style="white-space:nowrap; text-align:left;" id="TBL-38-7-3"  
class="td11"> Yes                             </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-38-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-38-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.11   </span> <a 
 id="x1-13900011.3.3.11"></a>Use List Functions</h5>
<!--l. 647--><p class="nopar" >These functions provide behaviour based upon set or unset use flags. Ebuilds must not run any of
these commands once the current phase function has returned. Ebuilds must not run any of these
functions in global scope.
</p><!--l. 651--><p class="noindent" >If any of these functions is called with a flag value that is not included in <span 
class="ectt-1000">IUSE_EFFECTIVE</span>, either
behaviour is undefined or it is an error as decided by table&#x00A0;<a 
href="#x1-139001r17">11.17<!--tex4ht:ref: tab:use-list-strictness --></a>.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">use</span> </dt><dd 
class="description">Returns shell true (0) if the first argument (a <span 
class="ectt-1000">USE </span>flag name) is enabled, false otherwise.
     If the flag name is prefixed with <span 
class="ectt-1000">!</span>, returns true if the flag is disabled, and false if it is
     enabled. It is guaranteed that this command is quiet.
     </dd><dt class="description">
<span 
class="ecbx-1000">usev</span> </dt><dd 
class="description">The same as <span 
class="ectt-1000">use</span>, but also prints the flag name if the condition is met.
     </dd><dt class="description">
<span 
class="ecbx-1000">useq</span> </dt><dd 
class="description">Deprecated synonym for <span 
class="ectt-1000">use</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">use_with</span> </dt><dd 
class="description"> <!--l. 661--><p class="noindent" >
                                                                                              </p><!--l. 661--><p class="noindent" >
                                                                                              <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">W</span><span 
class="small-caps">I</span><span 
class="small-caps">T</span><span 
class="small-caps">H</span></span></span> Has one-, two-, and three-argument forms. The first argument is a USE flag
     name, the second a <span 
class="ectt-1000">configure </span>option name (<span 
class="ectt-1000">${opt}</span>), defaulting to the same as the
     first argument if not provided, and the third is a string value (<span 
class="ectt-1000">${value}</span>). For EAPIs
     listed in table&#x00A0;<a 
href="#x1-139002r18">11.18<!--tex4ht:ref: tab:use-with-third-arg --></a> as not supporting it, an empty third argument is treated as if it
     weren&#8217;t provided. If the USE flag is set, outputs <span 
class="ectt-1000">--with-${opt}=${value} </span>if the third
     argument was provided, and <span 
class="ectt-1000">--with-${opt} </span>otherwise. If the flag is not set, then it
     outputs <span 
class="ectt-1000">--without-${opt}</span>.
     </p></dd><dt class="description">
<span 
class="ecbx-1000">use_enable</span> </dt><dd 
class="description">Works  the  same  as  <span 
class="ectt-1000">use_with()</span>,  but  outputs  <span 
class="ectt-1000">--enable- </span>or  <span 
class="ectt-1000">--disable-</span>
     instead of <span 
class="ectt-1000">--with- </span>or <span 
class="ectt-1000">--without-</span>.
     </dd><dt class="description">
<span 
class="ecbx-1000">usex</span> </dt><dd 
class="description"> <!--l. 671--><p class="noindent" >
                                                                                                     </p><!--l. 671--><p class="noindent" >
                                                                                                     <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span><span 
class="small-caps">X</span></span></span> Accepts at least one and at most five arguments. The first argument is a USE
     flag name, any subsequent arguments (<span 
class="ectt-1000">${arg2} </span>to <span 
class="ectt-1000">${arg5}</span>) are string values. If not
     provided, <span 
class="ectt-1000">${arg2} </span>and <span 
class="ectt-1000">${arg3} </span>default to <span 
class="ectt-1000">yes </span>and <span 
class="ectt-1000">no</span>, respectively; <span 
class="ectt-1000">${arg4} </span>and
     <span 
class="ectt-1000">${arg5} </span>default to the empty string. If the USE flag is set, outputs <span 
class="ectt-1000">${arg2}${arg4}</span>.
     Otherwise, outputs <span 
class="ectt-1000">${arg3}${arg5}</span>. The condition is inverted if the flag name is
     prefixed with&#x00A0;<span 
class="ectt-1000">!</span>. Only available in EAPIs listed in table&#x00A0;<a 
href="#x1-139003r19">11.19<!--tex4ht:ref: tab:usex-table --></a> as supporting <span 
class="ectt-1000">usex</span>.</p></dd></dl>
<div class="table">
                                                                            
                                                                            
<!--l. 681--><p class="noindent" ><a 
 id="x1-139001r17"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.17: </span><span  
class="content">EAPI Behaviour for Use Queries not in IUSE_EFFECTIVE</span></div><!--tex4ht:label?: x1-139001r17 -->
<div class="tabular">
 <table id="TBL-39" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-39-1g"><col 
id="TBL-39-1" /><col 
id="TBL-39-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-39-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-39-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-39-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Behaviour</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-39-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-39-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-39-2-2"  
class="td11"> Undefined    </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-39-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-39-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-39-3-2"  
class="td11"> Undefined</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-39-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-39-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-39-4-2"  
class="td11"> Undefined    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-39-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-39-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-39-5-2"  
class="td11"> Undefined    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-39-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-39-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-39-6-2"  
class="td11"> Error          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-39-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-39-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-39-7-2"  
class="td11"> Error          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-39-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-39-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 698--><p class="noindent" ><a 
 id="x1-139002r18"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.18: </span><span  
class="content">EAPIs supporting empty third argument in <span 
class="ectt-1000">use_with </span>and <span 
class="ectt-1000">use_enable</span></span></div><!--tex4ht:label?: x1-139002r18 -->
<div class="tabular">
 <table id="TBL-40" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-40-1g"><col 
id="TBL-40-1" /><col 
id="TBL-40-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-40-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-40-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-40-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports empty third argument?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-40-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-40-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-40-2-2"  
class="td11"> No                                                </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-40-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-40-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-40-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-40-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-40-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-40-4-2"  
class="td11"> No                                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-40-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-40-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-40-5-2"  
class="td11"> No                                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-40-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-40-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-40-6-2"  
class="td11"> Yes                                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-40-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-40-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-40-7-2"  
class="td11"> Yes                                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-40-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-40-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<div class="table">
                                                                            
                                                                            
<!--l. 716--><p class="noindent" ><a 
 id="x1-139003r19"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.19: </span><span  
class="content">EAPIs supporting <span 
class="ectt-1000">usex</span></span></div><!--tex4ht:label?: x1-139003r19 -->
<div class="tabular">
 <table id="TBL-41" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-41-1g"><col 
id="TBL-41-1" /><col 
id="TBL-41-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-41-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-41-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-41-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">usex</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-41-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-41-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-41-2-2"  
class="td11"> No                     </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-41-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-41-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-41-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-41-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-41-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-41-4-2"  
class="td11"> No                     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-41-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-41-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-41-5-2"  
class="td11"> No                     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-41-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-41-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-41-6-2"  
class="td11"> No                     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-41-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-41-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-41-7-2"  
class="td11"> Yes                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-41-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-41-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.12   </span> <a 
 id="x1-14000011.3.3.12"></a>Text List Functions</h5>
<!--l. 733--><p class="nopar" >These functions check whitespace-separated lists for a particular value.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">has</span> </dt><dd 
class="description">Returns shell true (0) if the first argument (a word) is found in the list of subsequent
     arguments, false otherwise. Guaranteed quiet.
     </dd><dt class="description">
<span 
class="ecbx-1000">hasv</span> </dt><dd 
class="description">The same as <span 
class="ectt-1000">has</span>, but also prints the first argument if found.
     </dd><dt class="description">
<span 
class="ecbx-1000">hasq</span> </dt><dd 
class="description">Deprecated synonym for <span 
class="ectt-1000">has</span>.</dd></dl>
<!--l. 742--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.13   </span> <a 
 id="x1-14100011.3.3.13"></a>Misc Commands</h5>
<!--l. 743--><p class="nopar" >The following commands are always available in the ebuild environment, but don&#8217;t really fit in any
of the above categories. Ebuilds must not run any of these commands once the current phase
function has returned.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">dosed</span> </dt><dd 
class="description">Takes any number of arguments, which can be files or <span 
class="ectt-1000">sed </span>expressions. For each
     argument, if it names, relative to <span 
class="ectt-1000">ED </span>(offset-prefix aware EAPIs) or <span 
class="ectt-1000">D </span>(offset-prefix
     agnostic EAPIs) a file which exists, then <span 
class="ectt-1000">sed </span>is run with the current expression on that
     file. Otherwise, the current expression is set to the text of the argument. The initial
     value of the expression is <span 
class="ectt-1000">s:${ED}::g </span>in offset-prefix aware EAPIs and <span 
class="ectt-1000">s:${D}::g </span>in
     offset-prefix agnostic EAPIs. In EAPIs listed in table&#x00A0;<a 
href="#x1-130001r8">11.8<!--tex4ht:ref: tab:banned-commands-table --></a>, this command is banned
     as per section&#x00A0;<a 
href="#x1-13000011.3.3.2">11.3.3.2<!--tex4ht:ref: sec:banned-commands --></a>.
     </dd><dt class="description">
<span 
class="ecbx-1000">unpack</span> </dt><dd 
class="description">Unpacks one or more source archives, in order, into the current directory. After
     unpacking, must ensure that all filesystem objects inside the current working directory
     (but not the current working directory itself) have permissions <span 
class="ectt-1000">a+r,u+w,go-w </span>and that
     all directories under the current working directory additionally have permissions <span 
class="ectt-1000">a+x</span>.
     <!--l. 761--><p class="noindent" >All arguments to <span 
class="ectt-1000">unpack </span>must be either a filename without path, in which case <span 
class="ectt-1000">unpack</span>
     looks in <span 
class="ectt-1000">DISTDIR </span>for the file, or start with the string <span 
class="ectt-1000">./</span>, in which case <span 
class="ectt-1000">unpack </span>uses the
     argument as a path relative to the working directory.
     </p><!--l. 765--><p class="noindent" >Any unrecognised file format shall be skipped silently. If unpacking a supported file
     format fails, <span 
class="ectt-1000">unpack </span>shall abort the build process.
                                                                               </p><!--l. 768--><p class="noindent" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">U</span><span 
class="small-caps">N</span><span 
class="small-caps">P</span><span 
class="small-caps">A</span><span 
class="small-caps">C</span><span 
class="small-caps">K</span>-<span 
class="small-caps">E</span><span 
class="small-caps">X</span><span 
class="small-caps">T</span><span 
class="small-caps">E</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span><span 
class="small-caps">I</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span></span></span></p><!--l. 768--><p class="noindent" >Must be able to unpack the following file formats, if the relevant binaries are available:
     </p>
         <ul class="itemize1">
         <li class="itemize">tar files (<span 
class="ectt-1000">*.tar</span>). Ebuilds must ensure that GNU tar installed.
         </li>
         <li class="itemize">gzip-compressed  tar  files  (<span 
class="ectt-1000">*.tar.gz, *.tgz, *.tar.Z, *.tbz</span>).  Ebuilds  must
         ensure that GNU gzip and GNU tar are installed.
                                                                            
                                                                            
         </li>
         <li class="itemize">bzip2-compressed  tar  files  (<span 
class="ectt-1000">*.tar.bz2, *.tbz2, *.tar.bz</span>).  Ebuilds  must
         ensure that bzip2 and GNU tar are installed.
         </li>
         <li class="itemize">zip files (<span 
class="ectt-1000">*.zip, *.ZIP, *.jar</span>). Ebuilds must ensure that Info-ZIP Unzip is
         installed.
         </li>
         <li class="itemize">gzip files (<span 
class="ectt-1000">*.gz, *.Z, *.z</span>). Ebuilds must ensure that GNU gzip is installed.
         </li>
         <li class="itemize">bzip2 files (<span 
class="ectt-1000">*.bz, *.bz2</span>). Ebuilds must ensure that bzip2 is installed.
         </li>
         <li class="itemize">7zip files (<span 
class="ectt-1000">*.7z, *.7Z</span>). Ebuilds must ensure that P7ZIP is installed.
         </li>
         <li class="itemize">rar files (<span 
class="ectt-1000">*.rar, *.RAR</span>). Ebuilds must ensure that RARLAB&#8217;s unrar is installed.
         </li>
         <li class="itemize">LHA archives (<span 
class="ectt-1000">*.LHA, *.LHa, *.lha, *.lhz</span>). Ebuilds must ensure that the lha
         program is installed.
         </li>
         <li class="itemize">ar archives (<span 
class="ectt-1000">*.a</span>). Ebuilds must ensure that GNU binutils is installed.
         </li>
         <li class="itemize">deb packages (<span 
class="ectt-1000">*.deb</span>). Ebuilds must ensure that the deb2targz program is installed
         on those platforms where the GNU binutils ar program is not available and the
         installed ar program is incompatible with GNU archives. Otherwise, ebuilds must
         ensure that GNU binutils is installed.
         </li>
         <li class="itemize">lzma-compressed files (<span 
class="ectt-1000">*.lzma</span>). Ebuilds must ensure that LZMA Utils is installed.
         </li>
         <li class="itemize">lzma-compressed tar files (<span 
class="ectt-1000">*.tar.lzma</span>). Ebuilds must ensure that LZMA Utils
         and GNU tar are installed.
         </li>
         <li class="itemize">xz-compressed files (<span 
class="ectt-1000">*.xz</span>). Ebuilds must ensure that XZ Utils is installed. Only
         for EAPIs listed in table&#x00A0;<a 
href="#x1-141001r20">11.20<!--tex4ht:ref: tab:unpack-extensions-table --></a> as supporting xz.
         </li>
         <li class="itemize">xz-compressed tar files (<span 
class="ectt-1000">*.tar.xz</span>). Ebuilds must ensure that XZ Utils and GNU
         tar are installed. Only for EAPIs listed in table&#x00A0;<a 
href="#x1-141001r20">11.20<!--tex4ht:ref: tab:unpack-extensions-table --></a> as supporting xz.</li></ul>
     <!--l. 795--><p class="nopar" >It is up to the ebuild to ensure that the relevant external utilities are available, whether by
     being in the system set or via dependencies.
</p>
     <div class="table">
     <!--l. 799--><p class="noindent" ><a 
 id="x1-141001r20"></a></p><hr class="float" /><div class="float" 
>
 <div class="caption" 
><span class="id">Table&#x00A0;11.20: </span><span  
class="content"><span 
class="ectt-1000">unpack </span>extensions for EAPIs</span></div><!--tex4ht:label?: x1-141001r20 -->
     <div class="tabular">
 <table id="TBL-42" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-42-1g"><col 
id="TBL-42-1" /><col 
id="TBL-42-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-42-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-42-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div>  </td><td  style="white-space:nowrap; text-align:center;" id="TBL-42-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ectt-1000">.xz </span><span 
class="ecbx-1000">and </span><span 
class="ectt-1000">.tar.xz</span><span 
class="ecbx-1000">?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-42-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-42-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-42-2-2"  
class="td11"> No                       </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-42-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-42-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td> <td  style="white-space:nowrap; text-align:left;" id="TBL-42-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-42-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-42-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-42-4-2"  
class="td11"> No                       </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-42-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-42-5-1"  
class="td11"> <span 
class="ectt-1000">3 </span></td> <td  style="white-space:nowrap; text-align:left;" id="TBL-42-5-2"  
class="td11"> Yes</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-42-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-42-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-42-6-2"  
class="td11"> Yes                      </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-42-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-42-7-1"  
class="td11"> <span 
class="ectt-1000">5 </span></td> <td  style="white-space:nowrap; text-align:left;" id="TBL-42-7-2"  
class="td11"> Yes</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-42-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-42-8-1"  
class="td11">        </td></tr></table>
     </div> </div><hr class="endfloat" />
     </div>
     </dd><dt class="description">
<span 
class="ecbx-1000">inherit</span> </dt><dd 
class="description">See section&#x00A0;<a 
href="#x1-11400010.1">10.1<!--tex4ht:ref: sec:inherit --></a>.
                                                                            
                                                                            
     </dd><dt class="description">
<span 
class="ecbx-1000">default</span> </dt><dd 
class="description"> <!--l. 818--><p class="noindent" >
                                                                                                 </p><!--l. 818--><p class="noindent" >
                                                                                                 <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">U</span><span 
class="small-caps">L</span><span 
class="small-caps">T</span>-<span 
class="small-caps">F</span><span 
class="small-caps">U</span><span 
class="small-caps">N</span><span 
class="small-caps">C</span></span></span> Calls the <span 
class="ectt-1000">default_ </span>function for the current phase (see section&#x00A0;<a 
href="#x1-1110009.1.17">9.1.17<!--tex4ht:ref: sec:default-phase-funcs --></a>). Must not be
     called if the <span 
class="ectt-1000">default_ </span>function does not exist for the current phase in the current EAPI.
     Only available in EAPIs listed in table&#x00A0;<a 
href="#x1-141002r21">11.21<!--tex4ht:ref: tab:default-function-table --></a>.</p></dd></dl>
<div class="table">
                                                                            
                                                                            
<!--l. 825--><p class="noindent" ><a 
 id="x1-141002r21"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;11.21: </span><span  
class="content">EAPIs supporting the <span 
class="ectt-1000">default </span>function</span></div><!--tex4ht:label?: x1-141002r21 -->
<div class="tabular">
 <table id="TBL-43" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-43-1g"><col 
id="TBL-43-1" /><col 
id="TBL-43-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-43-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-43-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-43-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Supports </span><span 
class="ectt-1000">default </span><span 
class="ecbx-1000">function?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-43-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-43-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-43-2-2"  
class="td11"> No                                       </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-43-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-43-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-43-3-2"  
class="td11"> No</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-43-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-43-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-43-4-2"  
class="td11"> Yes                                      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-43-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-43-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-43-5-2"  
class="td11"> Yes                                      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-43-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-43-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-43-6-2"  
class="td11"> Yes                                      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-43-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-43-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-43-7-2"  
class="td11"> Yes                                      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-43-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-43-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.14   </span> <a 
 id="x1-14200011.3.3.14"></a>Debug Commands</h5>
<!--l. 842--><p class="nopar" >The following commands are available for debugging. Normally all of these commands should be no
ops; a package manager may provide a special debug mode where these commands instead do
something. Ebuilds must not run any of these commands once the current phase function has
returned.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">debug-print</span> </dt><dd 
class="description">If in a special debug mode, the arguments should be outputted or recorded
     using some kind of debug logging.
     </dd><dt class="description">
<span 
class="ecbx-1000">debug-print-function</span> </dt><dd 
class="description">Calls  <span 
class="ectt-1000">debug-print </span>with  <span 
class="ectt-1000">$1: entering function </span>as  the  first
     argument and the remaining arguments as additional arguments.
     </dd><dt class="description">
<span 
class="ecbx-1000">debug-print-section</span> </dt><dd 
class="description">Calls <span 
class="ectt-1000">debug-print </span>with <span 
class="ectt-1000">now in section $*</span>.</dd></dl>
<!--l. 854--><p class="nopar" >
</p>
<h5 class="subsubsectionHead"><span class="titlemark">11.3.3.15   </span> <a 
 id="x1-14300011.3.3.15"></a>Reserved Commands and Variables</h5>
<!--l. 856--><p class="nopar" >Except where documented otherwise, all functions and variables that contain any of the following
strings (ignoring case) are reserved for package manager use and may not be used or relied upon by
ebuilds:
</p><!--l. 861--><p class="noindent" >
     </p><ul>
     <li class="compactitem"><span 
class="ectt-1000">__ </span>(two underscores) at beginning of string
     </li>
     <li class="compactitem"><span 
class="ectt-1000">abort</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">dyn</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">ebuild</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">hook</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">paludis</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">portage</span>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">prep</span></li></ul>
<!--l. 1--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">11.4   </span> <a 
 id="x1-14400011.4"></a>The state of the system between functions</h3>
                                                                            
                                                                            
<!--l. 4--><p class="nopar" >For the sake of this section:
</p><!--l. 7--><p class="noindent" >
     </p><ul>
     <li class="compactitem">Variancy is any package manager action that modifies either <span 
class="ectt-1000">ROOT </span>or <span 
class="ectt-1000">/ </span>in any way that
     isn&#8217;t merely a simple addition of something that doesn&#8217;t alter other packages. This
     includes any non-default call to any <span 
class="ectt-1000">pkg </span>phase function except <span 
class="ectt-1000">pkg_setup</span>, a merge of
     any package or an unmerge of any package.
     </li>
     <li class="compactitem">As an exception, changes to <span 
class="ectt-1000">DISTDIR </span>do not count as variancy.
     </li>
     <li class="compactitem">The <span 
class="ectt-1000">pkg_setup </span>function may be assumed not to introduce variancy. Thus, ebuilds
     must not perform variant actions in this phase.</li></ul>
<!--l. 17--><p class="noindent" >The following exclusivity and invariancy requirements are mandated:
</p><!--l. 20--><p class="noindent" >
     </p><ul>
     <li class="compactitem">No variancy shall be introduced at any point between a package&#8217;s <span 
class="ectt-1000">pkg_setup </span>being
     started up to the point that that package is merged, except for any variancy introduced
     by that package.
     </li>
     <li class="compactitem">There must be no variancy between a package&#8217;s <span 
class="ectt-1000">pkg_setup </span>and a package&#8217;s <span 
class="ectt-1000">pkg_</span>
     <span 
class="ectt-1000">postinst</span>, except for any variancy introduced by that package.
     </li>
     <li class="compactitem">Any non-default <span 
class="ectt-1000">pkg </span>phase function must be run exclusively.
     </li>
     <li class="compactitem">Each phase function must be called at most once during the build process for any given
     package.</li></ul>
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;12</span><br /><a 
 id="x1-14500012"></a>Merging and Unmerging</h2>
<!--l. 3--><p class="nopar" ><span class="paragraphHead"><a 
 id="x1-14600012"></a><span 
class="ecbx-1000">Note:</span></span>
In this chapter, <span 
class="ecti-1000">file </span>and <span 
class="ecti-1000">regular file </span>have their Unix meanings.
</p><!--l. 5--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">12.1   </span> <a 
 id="x1-14700012.1"></a>Overview</h3>
<!--l. 7--><p class="nopar" >The merge process merges the contents of the <span 
class="ectt-1000">D </span>directory onto the filesystem under <span 
class="ectt-1000">ROOT</span>. This is
not a straight copy; there are various subtleties which must be addressed.
</p><!--l. 10--><p class="noindent" >The unmerge process removes an installed package&#8217;s files. It is not covered in detail in this
specification.
</p><!--l. 13--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">12.2   </span> <a 
 id="x1-14800012.2"></a>Directories</h3>
<!--l. 15--><p class="nopar" >Directories are merged recursively onto the filesystem. The method used to perform the merge is
not specified, so long as the end result is correct. In particular, merging a directory may alter or
remove the source directory under <span 
class="ectt-1000">D</span>.
</p><!--l. 19--><p class="noindent" >Ebuilds must not attempt to merge a directory on top of any existing file that is not either a
directory or a symlink to a directory.
</p><!--l. 22--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">12.2.1   </span> <a 
 id="x1-14900012.2.1"></a>Permissions</h4>
<!--l. 24--><p class="nopar" >The owner, group and mode (including set*id and sticky bits) of the directory must be preserved,
except as follows:
</p><!--l. 28--><p class="noindent" >
     </p><ul>
     <li class="compactitem">Any directory owned by the user used to perform the build must become owned by the
     root user.
     </li>
     <li class="compactitem">Any directory whose group is the primary group of the user used to perform the build
     must have its group be that of the root user.</li></ul>
<!--l. 33--><p class="noindent" >On SELinux systems, the SELinux context must also be preserved. Other directory attributes,
including modification time, may be discarded.
</p><!--l. 36--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">12.2.2   </span> <a 
 id="x1-15000012.2.2"></a>Empty Directories</h4>
                                                                            
                                                                            
<!--l. 38--><p class="nopar" >Behaviour upon encountering an empty directory is undefined. Ebuilds must not attempt to install
an empty directory.
</p><!--l. 41--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">12.3   </span> <a 
 id="x1-15100012.3"></a>Regular Files</h3>
<!--l. 43--><p class="nopar" >Regular files are merged onto the filesystem (but see the notes on configuration file protection,
below). The method used to perform the merge is not specified, so long as the end result is
correct. In particular, merging a regular file may alter or remove the source file under
<span 
class="ectt-1000">D</span>.
</p><!--l. 47--><p class="noindent" >Ebuilds must not attempt to merge a regular file on top of any existing file that is not either a
regular file or a symlink to a regular file.
</p><!--l. 50--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">12.3.1   </span> <a 
 id="x1-15200012.3.1"></a>Permissions</h4>
<!--l. 52--><p class="nopar" >The owner, group and mode (including set*id and sticky bits) of the file must be preserved, except
as follows:
</p><!--l. 56--><p class="noindent" >
     </p><ul>
     <li class="compactitem">Any file owned by the user used to perform the build must become owned by the root
     user.
     </li>
     <li class="compactitem">Any file whose group is the primary group of the user used to perform the build must
     have its group be that of the root user.
     </li>
     <li class="compactitem">The package manager may reduce read and write permissions on executable files that
     have a set*id bit set.</li></ul>
<!--l. 63--><p class="noindent" >On SELinux systems, the SELinux context must also be preserved. Other file attributes may be
discarded.
</p><!--l. 66--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">12.3.2   </span> <a 
 id="x1-15300012.3.2"></a>File modification times</h4>
                                                                               <!--l. 69--><p class="nopar" >
                                                                               <span class="fbox"><span 
class="eccc-1000"><span 
class="small-caps">M</span><span 
class="small-caps">T</span><span 
class="small-caps">I</span><span 
class="small-caps">M</span><span 
class="small-caps">E</span>-<span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span><span 
class="small-caps">V</span><span 
class="small-caps">E</span></span></span></p><!--l. 69--><p class="noindent" >In EAPIs listed in table&#x00A0;<a 
href="#x1-153001r1">12.1<!--tex4ht:ref: tab:mtime-preserve --></a>, the package manager must preserve modification times of
regular files. This includes files being compressed before merging. Exceptions to this are
files newly created by the package manager and binary object files being stripped of
symbols.
</p><!--l. 75--><p class="noindent" >When preserving, the seconds part of every regular file&#8217;s mtime must be preserved exactly. The
sub-second part must either be set to zero, or set to the greatest value supported by the
operating system and filesystem that is not greater than the sub-second part of the original
time.
</p><!--l. 81--><p class="noindent" >For any given destination filesystem, the package manager must ensure that for any two preserved
files <span 
class="cmmi-10">a</span>, <span 
class="cmmi-10">b </span>in that filesystem the relation mtime<span 
class="cmr-10">(</span><span 
class="cmmi-10">a</span><span 
class="cmr-10">) </span><span 
class="cmsy-10">&le;</span> mtime<span 
class="cmr-10">(</span><span 
class="cmmi-10">b</span><span 
class="cmr-10">) </span>still holds, if it held under the original
image directory.
                                                                            
                                                                            
</p><!--l. 86--><p class="noindent" >In other EAPIs, the behaviour with respect to file modification times is undefined.
</p>
<div class="table">
                                                                            
                                                                            
<!--l. 90--><p class="noindent" ><a 
 id="x1-153001r1"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Table&#x00A0;12.1: </span><span  
class="content">Preservation of file modification times (mtimes)</span></div><!--tex4ht:label?: x1-153001r1 -->
<div class="tabular">
 <table id="TBL-44" class="tabular" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-44-1g"><col 
id="TBL-44-1" /><col 
id="TBL-44-2" /></colgroup><tr  
 style="vertical-align:baseline;" id="TBL-44-1-"><td  style="white-space:nowrap; text-align:center;" id="TBL-44-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPI</span></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-44-1-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">mtimes preserved?</span></div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-44-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-44-2-1"  
class="td11"> <span 
class="ectt-1000">0      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-44-2-2"  
class="td11"> Undefined                 </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-44-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-44-3-1"  
class="td11"> <span 
class="ectt-1000">1 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-44-3-2"  
class="td11"> Undefined</td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-44-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-44-4-1"  
class="td11"> <span 
class="ectt-1000">2      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-44-4-2"  
class="td11"> Undefined                 </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-44-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-44-5-1"  
class="td11"> <span 
class="ectt-1000">3      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-44-5-2"  
class="td11"> Yes                         </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-44-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-44-6-1"  
class="td11"> <span 
class="ectt-1000">4      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-44-6-2"  
class="td11"> Yes                         </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-44-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-44-7-1"  
class="td11"> <span 
class="ectt-1000">5      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-44-7-2"  
class="td11"> Yes                         </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-44-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-44-8-1"  
class="td11">        </td></tr></table></div>
                                                                            
                                                                            
</div><hr class="endfloat" />
</div>
<h4 class="subsectionHead"><span class="titlemark">12.3.3   </span> <a 
 id="x1-15400012.3.3"></a>Configuration File Protection</h4>
<!--l. 110--><p class="nopar" >The package manager must provide a means to prevent user configuration files from
being overwritten by any package updates. The profile variables <span 
class="ectt-1000">CONFIG_PROTECT </span>and
<span 
class="ectt-1000">CONFIG_PROTECT_MASK </span>(section&#x00A0;<a 
href="#x1-590005.3">5.3<!--tex4ht:ref: sec:profile-variables --></a>) control the paths for which this must be enforced.
</p><!--l. 115--><p class="noindent" >In order to ensure interoperability with configuration update tools, the following scheme must be
used by all package managers when merging any regular file:
</p><!--l. 119--><p class="noindent" >
     </p><dl class="compactenum"><dt class="compactenum">
  1. </dt><dd 
class="compactenum">If the directory containing the file to be merged is not listed in <span 
class="ectt-1000">CONFIG_PROTECT</span>, and is
     not a subdirectory of any such directory, and if the file is not listed in <span 
class="ectt-1000">CONFIG_PROTECT</span>,
     the file is merged normally.
     </dd><dt class="compactenum">
  2. </dt><dd 
class="compactenum">If the directory containing the file to be merged is listed in <span 
class="ectt-1000">CONFIG_PROTECT_MASK</span>, or
     is a subdirectory of such a directory, or if the file is listed in <span 
class="ectt-1000">CONFIG_PROTECT_MASK</span>,
     the file is merged normally.
     </dd><dt class="compactenum">
  3. </dt><dd 
class="compactenum">If no existing file with the intended filename exists, or the existing file has identical
     content to the one being merged, the file is installed normally.
     </dd><dt class="compactenum">
  4. </dt><dd 
class="compactenum">Otherwise, prepend the filename with <span 
class="ectt-1000">._cfg0000_</span>. If no file with the new name exists,
     then the file is merged with this name.
     </dd><dt class="compactenum">
  5. </dt><dd 
class="compactenum">Otherwise, increment the number portion (to form <span 
class="ectt-1000">._cfg0001_&#x003C;name&#x003E;</span>) and repeat
     step 4. Continue this process until a usable filename is found.
     </dd><dt class="compactenum">
  6. </dt><dd 
class="compactenum">If 9999 is reached in this way, behaviour is undefined.</dd></dl>
<!--l. 134--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">12.4   </span> <a 
 id="x1-15500012.4"></a>Symlinks</h3>
<!--l. 136--><p class="nopar" >Symlinks are merged as symlinks onto the filesystem. The link destination for a merged link shall
be the same as the link destination for the link under <span 
class="ectt-1000">D</span>, except as noted below. The method used
to perform the merge is not specified, so long as the end result is correct; in particular, merging a
symlink may alter or remove the symlink under <span 
class="ectt-1000">D</span>.
</p><!--l. 141--><p class="noindent" >Ebuilds must not attempt to merge a symlink on top of a directory.
</p><!--l. 143--><p class="nopar" >
</p>
<h4 class="subsectionHead"><span class="titlemark">12.4.1   </span> <a 
 id="x1-15600012.4.1"></a>Rewriting</h4>
<!--l. 145--><p class="nopar" >Any absolute symlink whose link starts with <span 
class="ectt-1000">D </span>must be rewritten with the leading <span 
class="ectt-1000">D </span>removed. The
package manager should issue a notice when doing this.
                                                                            
                                                                            
</p><!--l. 148--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">12.5   </span> <a 
 id="x1-15700012.5"></a>Hard links</h3>
<!--l. 150--><p class="nopar" >A hard link may be merged either as a single file with links or as multiple independent
files.
</p><!--l. 152--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">12.6   </span> <a 
 id="x1-15800012.6"></a>Other Files</h3>
<!--l. 154--><p class="nopar" >Ebuilds must not attempt to install any other type of file (FIFOs, device nodes etc).
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;13</span><br /><a 
 id="x1-15900013"></a>Metadata Cache</h2>
<h3 class="sectionHead"><span class="titlemark">13.1   </span> <a 
 id="x1-16000013.1"></a>Directory Contents</h3>
<!--l. 6--><p class="nopar" >The <span 
class="ectt-1000">profiles/metadata/cache </span>directory, if it exists, contains directories whose names are the
same as categories in the repository. Each subdirectory may optionally contain one file per
package version in that category, named <span 
class="ectt-1000">&#x003C;package&#x003E;-&#x003C;version&#x003E;</span>, in the format described
below.
</p><!--l. 10--><p class="noindent" >The metadata cache may be incomplete or non-existent, and may contain additional bogus
entries.
</p><!--l. 12--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">13.2   </span> <a 
 id="x1-16100013.2"></a>Cache File Format</h3>
<!--l. 14--><p class="nopar" >Each cache file contains the textual values of various metadata keys, one per line, in the
following order. Other lines may be present following these; their meanings are not defined
here.
</p><!--l. 18--><p class="noindent" >
     </p><dl class="compactenum"><dt class="compactenum">
  1. </dt><dd 
class="compactenum">Build-time dependencies (<span 
class="ectt-1000">DEPEND</span>)
     </dd><dt class="compactenum">
  2. </dt><dd 
class="compactenum">Run-time dependencies (<span 
class="ectt-1000">RDEPEND</span>)
     </dd><dt class="compactenum">
  3. </dt><dd 
class="compactenum">Slot (<span 
class="ectt-1000">SLOT</span>)
     </dd><dt class="compactenum">
  4. </dt><dd 
class="compactenum">Source tarball URIs (<span 
class="ectt-1000">SRC_URI</span>)
     </dd><dt class="compactenum">
  5. </dt><dd 
class="compactenum"><span 
class="ectt-1000">RESTRICT</span>
     </dd><dt class="compactenum">
  6. </dt><dd 
class="compactenum">Package homepage (<span 
class="ectt-1000">HOMEPAGE</span>)
     </dd><dt class="compactenum">
  7. </dt><dd 
class="compactenum">Package license (<span 
class="ectt-1000">LICENSE</span>)
     </dd><dt class="compactenum">
  8. </dt><dd 
class="compactenum">Package description (<span 
class="ectt-1000">DESCRIPTION</span>)
     </dd><dt class="compactenum">
  9. </dt><dd 
class="compactenum">Package keywords (<span 
class="ectt-1000">KEYWORDS</span>)
     </dd><dt class="compactenum">
 10. </dt><dd 
class="compactenum">Inherited eclasses (<span 
class="ectt-1000">INHERITED</span>)
     </dd><dt class="compactenum">
 11. </dt><dd 
class="compactenum">Use flags that this package respects (<span 
class="ectt-1000">IUSE</span>)
     </dd><dt class="compactenum">
 12. </dt><dd 
class="compactenum">Use  flags  that  this  package  requires  (<span 
class="ectt-1000">REQUIRED_USE</span>).  Blank  in  some  EAPIs;  see
     table&#x00A0;<a 
href="#x1-67002r2">7.2<!--tex4ht:ref: tab:optional-vars-table --></a>.
     </dd><dt class="compactenum">
 13. </dt><dd 
class="compactenum">Post dependencies (<span 
class="ectt-1000">PDEPEND</span>)
     </dd><dt class="compactenum">
 14. </dt><dd 
class="compactenum">Unused; previously used for old-style virtual <span 
class="ectt-1000">PROVIDE</span>.
     </dd><dt class="compactenum">
 15. </dt><dd 
class="compactenum">The ebuild API version to which this package conforms (<span 
class="ectt-1000">EAPI</span>)
                                                                            
                                                                            
     </dd><dt class="compactenum">
 16. </dt><dd 
class="compactenum">Properties (<span 
class="ectt-1000">PROPERTIES</span>). In some EAPIs, may optionally be blank, regardless of ebuild
     metadata; see table&#x00A0;<a 
href="#x1-67002r2">7.2<!--tex4ht:ref: tab:optional-vars-table --></a>.
     </dd><dt class="compactenum">
 17. </dt><dd 
class="compactenum">Defined phases (<span 
class="ectt-1000">DEFINED_PHASES</span>). In some EAPIs, may optionally be blank, regardless
     of ebuild metadata; see table&#x00A0;<a 
href="#x1-73001r4">7.4<!--tex4ht:ref: tab:defined-phases-table --></a>.
     </dd><dt class="compactenum">
 18. </dt><dd 
class="compactenum">Blank lines to pad the file to 22 lines long</dd></dl>
<!--l. 41--><p class="noindent" >Future EAPIs may define new variables, remove existing variables, change the line number or
format used for a particular variable, add or reduce the total length of the file and so on. Any
future EAPI that uses this cache format will continue to place the EAPI value on line 15 if such a
concept makes sense for that EAPI, and will place a value that is clearly not a supported EAPI on
line 15 if it does not.
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
</p>
<h2 class="chapterHead"><span class="titlemark">Chapter&#x00A0;14</span><br /><a 
 id="x1-16200014"></a>Glossary</h2>
<!--l. 4--><p class="nopar" >This section contains explanations of some of the terms used in this document whose meaning may
not be immediately obvious.
     </p><dl class="description"><dt class="description">
<span 
class="ecbx-1000">qualified package name</span> </dt><dd 
class="description">A package name along with its associated category. For example,
     <span 
class="ectt-1000">app-editors/vim </span>is a qualified package name.
     </dd><dt class="description">
<span 
class="ecbx-1000">new-style virtual</span> </dt><dd 
class="description">A new-style virtual is a normal package in the <span 
class="ectt-1000">virtual </span>category which
     installs no files and uses its dependency requirements to pull in a &#8216;provider&#8217;. Historically,
     old-style  virtuals  required  special  handling  from  the  package  manager;  new-style
     virtuals do not.
     </dd><dt class="description">
<span 
class="ecbx-1000">stand-alone repository</span> </dt><dd 
class="description">An (ebuild) repository which is intended to function on its own
     as the only, or primary, repository on a system. Contrast with <span 
class="ecti-1000">slave repository </span>below.
     </dd><dt class="description">
<span 
class="ecbx-1000">slave repository, non-stand-alone repository</span> </dt><dd 
class="description">An  (ebuild)  repository  which  is  not
     complete enough to function on its own, but needs one or more <span 
class="ecti-1000">master repositories </span>to
     satisfy dependencies and provide repository-level support files. Known in Portage as
     an overlay.
     </dd><dt class="description">
<span 
class="ecbx-1000">master repository</span> </dt><dd 
class="description">See above.
     </dd></dl>
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
<a 
 id="x1-162001r218"></a>
<h2 class="appendixHead"><span class="titlemark">Appendix&#x00A0;A</span><br /><a 
 id="x1-163000A"></a>metadata.xml</h2>
<!--l. 4--><p class="nopar" >The <span 
class="ectt-1000">metadata.xml </span>file is used to contain extra package- or category-level information beyond what
is stored in ebuild metadata. Its exact format is strictly beyond the scope of this document, and is
described in the DTD file located at <a 
href="http://www.gentoo.org/dtd/metadata.dtd" class="url" ><span 
class="ectt-1000">http://www.gentoo.org/dtd/metadata.dtd</span></a>.
                                                                            
                                                                            
<a 
 id="x1-163001r218"></a>
</p>
<h2 class="appendixHead"><span class="titlemark">Appendix&#x00A0;B</span><br /><a 
 id="x1-164000B"></a>Unspecified Items</h2>
<!--l. 10--><p class="nopar" >The following items are not specified by this document, and must not be relied upon by ebuilds.
This is, of course, an incomplete list&#8212;it covers only the things that the authors know have been
abused in the past.
     </p><ul>
     <li class="compactitem">The <span 
class="ectt-1000">FEATURES </span>variable. This is Portage specific.
     </li>
     <li class="compactitem">Similarly, any <span 
class="ectt-1000">EMERGE_ </span>variable and any <span 
class="ectt-1000">PORTAGE_ </span>variable not explicitly listed.
     </li>
     <li class="compactitem">Any Portage configuration file.
     </li>
     <li class="compactitem">The VDB (<span 
class="ectt-1000">/var/db/pkg</span>). Ebuilds must not access this or rely upon it existing or being
     in any particular format.
     </li>
     <li class="compactitem">The  <span 
class="ectt-1000">portageq </span>command.  The  <span 
class="ectt-1000">has_version </span>and  <span 
class="ectt-1000">best_version </span>commands  are
     available as functions.
     </li>
     <li class="compactitem">The <span 
class="ectt-1000">emerge </span>command.
     </li>
     <li class="compactitem">Binary packages.
     </li>
     <li class="compactitem">The <span 
class="ectt-1000">PORTDIR_OVERLAY </span>variable, and overlay behaviour in general.</li></ul>
                                                                            
                                                                            
<a 
 id="x1-164001r218"></a>
<h2 class="appendixHead"><span class="titlemark">Appendix&#x00A0;C</span><br /><a 
 id="x1-165000C"></a>Historical Curiosities</h2>
<!--l. 29--><p class="nopar" >The items described in this chapter are included for information only. They were deprecated or
abandoned long before <span 
class="ectt-1000">EAPI </span>was introduced. Ebuilds must not use these features, and package
managers should not be changed to support them.
</p>
<h3 class="sectionHead"><span class="titlemark">C.1   </span> <a 
 id="x1-166000C.1"></a>If-else use blocks</h3>
<!--l. 35--><p class="nopar" >Historically, Portage supported if-else use conditionals, as shown by listing&#x00A0;<a 
href="#x1-166001r1">C.1<!--tex4ht:ref: lst:if-else-use-listing --></a>. The block before
the colon would be taken if the condition was met, and the block after the colon would be taken if
the condition was not met.
</p><!--l. 39--><p class="noindent" >This feature was deprecated and removed from the tree long before the introduction of
<span 
class="ectt-1000">EAPI</span>.
                                                                            
                                                                            
</p><!--l. 42--><p class="noindent" ><a 
 id="x1-166001r1"></a></p><hr class="float" /><div class="float" 
>
                                                                            
                                                                            
 <div class="caption" 
><span class="id">Listing C.1: </span><span  
class="content">If-else use blocks</span></div><!--tex4ht:label?: x1-166001r1 -->
<div class="verbatiminput">
<span 
class="ectt-1000">DEPEND="</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;flag?</span><span 
class="ectt-1000">&#x00A0;(</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;taken/if-true</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;)</span><span 
class="ectt-1000">&#x00A0;:</span><span 
class="ectt-1000">&#x00A0;(</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;taken/if-false</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;)</span>
<span 
class="ectt-1000">&#x00A0;</span><br /><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;</span><span 
class="ectt-1000">&#x00A0;"</span>
</div>
                                                                            
                                                                            
</div><hr class="endfloat" />
<h3 class="sectionHead"><span class="titlemark">C.2   </span> <a 
 id="x1-167000C.2"></a>cvs Versions</h3>
<!--l. 48--><p class="nopar" >Portage has very crude support for CVS packages. The package <span 
class="ectt-1000">foo </span>could contain a file named
<span 
class="ectt-1000">foo-cvs.1.2.3.ebuild</span>. This version would order <span 
class="ecti-1000">higher </span>than any non-CVS version (including
<span 
class="ectt-1000">foo-2.ebuild</span>). This feature has not seen real world use and breaks versioned dependencies, so it
must not be used.
</p><!--l. 53--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">C.3   </span> <a 
 id="x1-168000C.3"></a>use.defaults</h3>
<!--l. 55--><p class="nopar" >The <span 
class="ectt-1000">use.defaults </span>file in the profile directory was used to implement &#8216;autouse&#8217;&#8212;switching USE
flags on or off depending upon which packages are installed. It was deprecated long ago and finally
removed in 2009.
</p><!--l. 59--><p class="nopar" >
</p>
<h3 class="sectionHead"><span class="titlemark">C.4   </span> <a 
 id="x1-169000C.4"></a>Old-style Virtuals</h3>
<!--l. 61--><p class="nopar" >Historically, virtuals were special packages rather than regular ebuilds. An ebuild could specify in
the <span 
class="ectt-1000">PROVIDE </span>metadata that it supplied certain virtuals, and the package manager had to bear this
in mind when handling dependencies.
</p><!--l. 65--><p class="noindent" >Old-style virtuals were supported by EAPIs <span 
class="ectt-1000">0</span>, <span 
class="ectt-1000">1</span>, <span 
class="ectt-1000">2</span>, <span 
class="ectt-1000">3 </span>and <span 
class="ectt-1000">4</span>, and were phased out via GLEP
37&#x00A0;<span class="cite">[<a 
href="#XGlep37">2</a>]</span>.
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
                                                                            
<a 
 id="x1-169001r218"></a>
</p>
<h2 class="appendixHead"><span class="titlemark">Appendix&#x00A0;D</span><br /><a 
 id="x1-170000D"></a>Feature Availability by EAPI</h2>
<!--l. 3--><p class="nopar" ><span class="paragraphHead"><a 
 id="x1-171000D"></a><span 
class="ecbx-1000">Note:</span></span>
This chapter is informative and for convenience only. Refer to the main text for specifics.
                                                                            
                                                                            
                                                                            <a 
 id="x1-171001r1"></a>
</p><!--l. 9--><div class="longtable"> <table id="TBL-45" class="longtable" 
cellspacing="0" cellpadding="0"  
><colgroup id="TBL-45-1g"><col 
id="TBL-45-1" /><col 
id="TBL-45-2" /><col 
id="TBL-45-3" /><col 
id="TBL-45-4" /><col 
id="TBL-45-5" /><col 
id="TBL-45-6" /><col 
id="TBL-45-7" /><col 
id="TBL-45-8" /></colgroup>
<tr  
 style="vertical-align:baseline;" id="TBL-45-1-"><td colspan="6" style="white-space:nowrap; text-align:left;" id="TBL-45-1-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"> <div class="caption" 
><span class="id">Table&#x00A0;D.1: </span><span  
class="content">Features in EAPIs</span></div><!--tex4ht:label?: x1-171001r1 -->                                              </div>  <a 
 id="x1-171002"></a>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-45-2-"><td colspan="6" style="white-space:nowrap; text-align:left;" id="TBL-45-2-1"  
class="td11"></td><!--cmidrule-->
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-3-"><td  style="white-space:nowrap; text-align:center;" id="TBL-45-3-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Feature</span></div>  </td><td  style="white-space:nowrap; text-align:center;" id="TBL-45-3-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">Reference</span></div>  </td><td colspan="4" style="white-space:nowrap; text-align:center;" id="TBL-45-3-3"  
class="td11">      <div class="multicolumn"  style="white-space:nowrap; text-align:center;"><span 
class="ecbx-1000">EAPIs</span></div></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-45-4-"><td  style="white-space:nowrap; text-align:center;" id="TBL-45-4-1"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-45-4-2"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;"></div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-45-4-3"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;">0</div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-45-4-4"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;">1</div> </td><td  style="white-space:nowrap; text-align:center;" id="TBL-45-4-5"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;">2</div>  </td><td  style="white-space:nowrap; text-align:center;" id="TBL-45-4-6"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;">3</div>  </td><td  style="white-space:nowrap; text-align:center;" id="TBL-45-4-7"  
class="td11"> <div class="multicolumn"  style="white-space:nowrap; text-align:center;">4</div>  </td><td  style="white-space:nowrap; text-align:center;" id="TBL-45-4-8"  
class="td11">  <div class="multicolumn"  style="white-space:nowrap; text-align:center;">5</div>
</td></tr><tr  
 style="vertical-align:baseline;" id="TBL-45-5-"><td colspan="6" style="white-space:nowrap; text-align:left;" id="TBL-45-5-1"  
class="td11"></td><!--cmidrule-->
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-6-1"  
class="td11">          </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-45-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-7-1"  
class="td11"></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-7-2"  
class="td11">            </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-7-3"  
class="td11">   </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-7-4"  
class="td11">   </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-7-5"  
class="td11">   </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-7-6"  
class="td11">   </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-7-7"  
class="td11">   </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-7-8"  
class="td11">
</td></tr>
<tr  
 style="vertical-align:baseline;" id="TBL-45-20-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-20-1"  
class="td11"> Stable use masking/forcing  </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-20-2"  
class="td11"> stablemask&#x00A0;p<a 
href="#x1-580005.2.11">59<!--tex4ht:ref: lst:if-else-use-listing --></a>            </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-20-3"  
class="td11">
 <!--l. 44--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-20-4"  
class="td11">
 <!--l. 44--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-20-5"  
class="td11">
 <!--l. 44--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-20-6"  
class="td11">
 <!--l. 44--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-20-7"  
class="td11">
 <!--l. 44--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-20-8"  
class="td11">
 <!--l. 44--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-21-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-21-1"  
class="td11"> <span 
class="ectt-1000">IUSE </span>defaults                    </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-21-2"  
class="td11"> iuse-defaults&#x00A0;p<a 
href="#x1-670007.3">77<!--tex4ht:ref: lst:if-else-use-listing --></a>          </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-21-3"  
class="td11">
 <!--l. 47--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-21-4"  
class="td11">
 <!--l. 47--><p class="noindent" >Yes            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-21-5"  
class="td11">
 <!--l. 47--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-21-6"  
class="td11">
 <!--l. 47--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-21-7"  
class="td11">
 <!--l. 47--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-21-8"  
class="td11">
 <!--l. 47--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-22-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-22-1"  
class="td11"> <span 
class="ectt-1000">REQUIRED_USE            </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-22-2"  
class="td11"> required-use&#x00A0;p<a 
href="#x1-670007.3">77<!--tex4ht:ref: lst:if-else-use-listing --></a>           </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-22-3"  
class="td11">
 <!--l. 50--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-22-4"  
class="td11">
 <!--l. 50--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-22-5"  
class="td11">
 <!--l. 50--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-22-6"  
class="td11">
 <!--l. 50--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-22-7"  
class="td11">
 <!--l. 50--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-22-8"  
class="td11">
 <!--l. 50--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-23-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-23-1"  
class="td11"> <span 
class="ectt-1000">PROPERTIES              </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-23-2"  
class="td11"> properties&#x00A0;p<a 
href="#x1-670007.3">77<!--tex4ht:ref: lst:if-else-use-listing --></a>             </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-23-3"  
class="td11">
 <!--l. 53--><p class="noindent" >Optionally   </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-23-4"  
class="td11">
 <!--l. 53--><p class="noindent" >Optionally   </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-23-5"  
class="td11">
 <!--l. 53--><p class="noindent" >Optionally      </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-23-6"  
class="td11">
 <!--l. 53--><p class="noindent" >Optionally      </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-23-7"  
class="td11">
 <!--l. 53--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-23-8"  
class="td11">
 <!--l. 53--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-24-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-24-1"  
class="td11"> <span 
class="ectt-1000">RDEPEND=DEPEND          </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-24-2"  
class="td11"> rdepend-depend&#x00A0;p<a 
href="#x1-700007.3.3">84<!--tex4ht:ref: lst:if-else-use-listing --></a>      </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-24-3"  
class="td11">
 <!--l. 56--><p class="noindent" >Yes            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-24-4"  
class="td11">
 <!--l. 56--><p class="noindent" >Yes            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-24-5"  
class="td11">
 <!--l. 56--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-24-6"  
class="td11">
 <!--l. 56--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-24-7"  
class="td11">
 <!--l. 56--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-24-8"  
class="td11">
 <!--l. 56--><p class="noindent" >No                </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-25-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-25-1"  
class="td11"> <span 
class="ectt-1000">DEFINED_PHASES          </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-25-2"  
class="td11"> defined-phases&#x00A0;p<a 
href="#x1-720007.4">88<!--tex4ht:ref: lst:if-else-use-listing --></a>        </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-25-3"  
class="td11">
 <!--l. 59--><p class="noindent" >Optionally   </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-25-4"  
class="td11">
 <!--l. 59--><p class="noindent" >Optionally   </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-25-5"  
class="td11">
 <!--l. 59--><p class="noindent" >Optionally      </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-25-6"  
class="td11">
 <!--l. 59--><p class="noindent" >Optionally      </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-25-7"  
class="td11">
 <!--l. 59--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-25-8"  
class="td11">
 <!--l. 59--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-26-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-26-1"  
class="td11"> <span 
class="ectt-1000">?? ( ) groups           </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-26-2"  
class="td11"> at-most-one-of&#x00A0;p<a 
href="#x1-760008.2">98<!--tex4ht:ref: lst:if-else-use-listing --></a>        </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-26-3"  
class="td11">
 <!--l. 62--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-26-4"  
class="td11">
 <!--l. 62--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-26-5"  
class="td11">
 <!--l. 62--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-26-6"  
class="td11">
 <!--l. 62--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-26-7"  
class="td11">
 <!--l. 62--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-26-8"  
class="td11">
 <!--l. 62--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-27-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-27-1"  
class="td11"> <span 
class="ectt-1000">SRC_URI </span>arrows                 </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-27-2"  
class="td11"> src-uri-arrows&#x00A0;p<a 
href="#x1-920008.2.10">116<!--tex4ht:ref: lst:if-else-use-listing --></a>       </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-27-3"  
class="td11">
 <!--l. 65--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-27-4"  
class="td11">
 <!--l. 65--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-27-5"  
class="td11">
 <!--l. 65--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-27-6"  
class="td11">
 <!--l. 65--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-27-7"  
class="td11">
 <!--l. 65--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-27-8"  
class="td11">
 <!--l. 65--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-28-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-28-1"  
class="td11"> Slot dependencies              </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-28-2"  
class="td11"> slot-deps&#x00A0;p<a 
href="#x1-860008.2.6.3">114<!--tex4ht:ref: lst:if-else-use-listing --></a>              </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-28-3"  
class="td11">
 <!--l. 68--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-28-4"  
class="td11">
 <!--l. 68--><p class="noindent" >Named        </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-28-5"  
class="td11">
 <!--l. 68--><p class="noindent" >Named           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-28-6"  
class="td11">
 <!--l. 68--><p class="noindent" >Named           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-28-7"  
class="td11">
 <!--l. 68--><p class="noindent" >Named           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-28-8"  
class="td11">
 <!--l. 68--><p class="noindent" >Named
  and
  Operator        </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-29-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-29-1"  
class="td11"> Sub-slots                         </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-29-2"  
class="td11"> sub-slot&#x00A0;p<a 
href="#x1-860008.2.6.3">114<!--tex4ht:ref: lst:if-else-use-listing --></a>               </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-29-3"  
class="td11">
 <!--l. 71--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-29-4"  
class="td11">
 <!--l. 71--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-29-5"  
class="td11">
 <!--l. 71--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-29-6"  
class="td11">
 <!--l. 71--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-29-7"  
class="td11">
 <!--l. 71--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-29-8"  
class="td11">
 <!--l. 71--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-30-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-30-1"  
class="td11"> Use dependencies              </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-30-2"  
class="td11"> use-deps&#x00A0;p<a 
href="#x1-820008.2.6">105<!--tex4ht:ref: lst:if-else-use-listing --></a>              </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-30-3"  
class="td11">
 <!--l. 74--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-30-4"  
class="td11">
 <!--l. 74--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-30-5"  
class="td11">
 <!--l. 74--><p class="noindent" >2-style           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-30-6"  
class="td11">
 <!--l. 74--><p class="noindent" >2-style           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-30-7"  
class="td11">
 <!--l. 74--><p class="noindent" >4-style           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-30-8"  
class="td11">
 <!--l. 74--><p class="noindent" >4-style           </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-31-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-31-1"  
class="td11"> <span 
class="ectt-1000">! </span>blockers                        </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-31-2"  
class="td11"> bang-strength&#x00A0;p<a 
href="#x1-850008.2.6.2">111<!--tex4ht:ref: lst:if-else-use-listing --></a>       </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-31-3"  
class="td11">
 <!--l. 77--><p class="noindent" >Unspecified  </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-31-4"  
class="td11">
 <!--l. 77--><p class="noindent" >Unspecified  </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-31-5"  
class="td11">
 <!--l. 77--><p class="noindent" >Weak             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-31-6"  
class="td11">
 <!--l. 77--><p class="noindent" >Weak             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-31-7"  
class="td11">
 <!--l. 77--><p class="noindent" >Weak             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-31-8"  
class="td11">
 <!--l. 77--><p class="noindent" >Weak             </p></td>
                                                                                                                                                                                                                               
                                                                            
                                                                            
                                                                            </tr><tr  
 style="vertical-align:baseline;" id="TBL-45-32-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-32-1"  
class="td11"> <span 
class="ectt-1000">!! </span>blockers                       </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-32-2"  
class="td11"> bang-strength&#x00A0;p<a 
href="#x1-850008.2.6.2">111<!--tex4ht:ref: lst:if-else-use-listing --></a>       </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-32-3"  
class="td11">
 <!--l. 80--><p class="noindent" >Forbidden    </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-32-4"  
class="td11">
 <!--l. 80--><p class="noindent" >Forbidden    </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-32-5"  
class="td11">
 <!--l. 80--><p class="noindent" >Strong           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-32-6"  
class="td11">
 <!--l. 80--><p class="noindent" >Strong           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-32-7"  
class="td11">
 <!--l. 80--><p class="noindent" >Strong           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-32-8"  
class="td11">
 <!--l. 80--><p class="noindent" >Strong           </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-33-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-33-1"  
class="td11"> <span 
class="ectt-1000">S </span>to <span 
class="ectt-1000">WORKDIR </span>fallback         </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-33-2"  
class="td11"> s-workdir-fallback&#x00A0;p<a 
href="#x1-950009.1.1">119<!--tex4ht:ref: lst:if-else-use-listing --></a>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-33-3"  
class="td11">
 <!--l. 83--><p class="noindent" >Always       </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-33-4"  
class="td11">
 <!--l. 83--><p class="noindent" >Always       </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-33-5"  
class="td11">
 <!--l. 83--><p class="noindent" >Always          </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-33-6"  
class="td11">
 <!--l. 83--><p class="noindent" >Always          </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-33-7"  
class="td11">
 <!--l. 83--><p class="noindent" >Conditional    </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-33-8"  
class="td11">
 <!--l. 83--><p class="noindent" >Conditional    </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-34-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-34-1"  
class="td11"> <span 
class="ectt-1000">pkg_pretend             </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-34-2"  
class="td11"> pkg-pretend&#x00A0;p<a 
href="#x1-960009.1.2">122<!--tex4ht:ref: lst:if-else-use-listing --></a>         </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-34-3"  
class="td11">
 <!--l. 86--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-34-4"  
class="td11">
 <!--l. 86--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-34-5"  
class="td11">
 <!--l. 86--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-34-6"  
class="td11">
 <!--l. 86--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-34-7"  
class="td11">
 <!--l. 86--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-34-8"  
class="td11">
 <!--l. 86--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-35-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-35-1"  
class="td11"> <span 
class="ectt-1000">src_prepare             </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-35-2"  
class="td11"> src-prepare&#x00A0;p<a 
href="#x1-990009.1.5">126<!--tex4ht:ref: lst:if-else-use-listing --></a>           </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-35-3"  
class="td11">
 <!--l. 89--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-35-4"  
class="td11">
 <!--l. 89--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-35-5"  
class="td11">
 <!--l. 89--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-35-6"  
class="td11">
 <!--l. 89--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-35-7"  
class="td11">
 <!--l. 89--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-35-8"  
class="td11">
 <!--l. 89--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-36-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-36-1"  
class="td11"> <span 
class="ectt-1000">src_configure           </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-36-2"  
class="td11"> src-configure&#x00A0;p<a 
href="#x1-1000009.1.6">129<!--tex4ht:ref: lst:if-else-use-listing --></a>         </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-36-3"  
class="td11">
 <!--l. 92--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-36-4"  
class="td11">
 <!--l. 92--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-36-5"  
class="td11">
 <!--l. 92--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-36-6"  
class="td11">
 <!--l. 92--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-36-7"  
class="td11">
 <!--l. 92--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-36-8"  
class="td11">
 <!--l. 92--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-37-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-37-1"  
class="td11"> <span 
class="ectt-1000">src_compile </span>style             </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-37-2"  
class="td11"> src-compile&#x00A0;p<a 
href="#x1-1010009.1.7">133<!--tex4ht:ref: lst:if-else-use-listing --></a>          </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-37-3"  
class="td11">
 <!--l. 95--><p class="noindent" >0               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-37-4"  
class="td11">
 <!--l. 95--><p class="noindent" >1               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-37-5"  
class="td11">
 <!--l. 95--><p class="noindent" >2                  </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-37-6"  
class="td11">
 <!--l. 95--><p class="noindent" >2                  </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-37-7"  
class="td11">
 <!--l. 95--><p class="noindent" >2                  </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-37-8"  
class="td11">
 <!--l. 95--><p class="noindent" >2                  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-38-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-38-1"  
class="td11"> Parallel tests                    </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-38-2"  
class="td11"> parallel-tests&#x00A0;p<a 
href="#x1-1020009.1.8">139<!--tex4ht:ref: lst:if-else-use-listing --></a>        </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-38-3"  
class="td11">
 <!--l. 98--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-38-4"  
class="td11">
 <!--l. 98--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-38-5"  
class="td11">
 <!--l. 98--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-38-6"  
class="td11">
 <!--l. 98--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-38-7"  
class="td11">
 <!--l. 98--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-38-8"  
class="td11">
 <!--l. 98--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-39-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-39-1"  
class="td11"> <span 
class="ectt-1000">src_install </span>style             </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-39-2"  
class="td11"> src-install&#x00A0;p<a 
href="#x1-1030009.1.9">142<!--tex4ht:ref: lst:if-else-use-listing --></a>            </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-39-3"  
class="td11">
 <!--l. 101--><p class="noindent" >no-op         </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-39-4"  
class="td11">
 <!--l. 101--><p class="noindent" >no-op         </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-39-5"  
class="td11">
 <!--l. 101--><p class="noindent" >no-op            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-39-6"  
class="td11">
 <!--l. 101--><p class="noindent" >no-op            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-39-7"  
class="td11">
 <!--l. 101--><p class="noindent" >4                  </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-39-8"  
class="td11">
 <!--l. 101--><p class="noindent" >4                  </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-40-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-40-1"  
class="td11">                         </td></tr>
<tr  
 style="vertical-align:baseline;" id="TBL-45-41-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-41-1"  
class="td11"> <span 
class="ectt-1000">pkg_info               </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-41-2"  
class="td11"> pkg-info&#x00A0;p<a 
href="#x1-1090009.1.15">147<!--tex4ht:ref: lst:if-else-use-listing --></a>                 </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-41-3"  
class="td11">
 <!--l. 104--><p class="noindent" >Installed      </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-41-4"  
class="td11">
 <!--l. 104--><p class="noindent" >Installed      </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-41-5"  
class="td11">
 <!--l. 104--><p class="noindent" >Installed         </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-41-6"  
class="td11">
 <!--l. 104--><p class="noindent" >Installed         </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-41-7"  
class="td11">
 <!--l. 104--><p class="noindent" >Both             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-41-8"  
class="td11">
 <!--l. 104--><p class="noindent" >Both             </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-42-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-42-1"  
class="td11"> <span 
class="ectt-1000">default_ </span>phase functions  </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-42-2"  
class="td11"> default-phase-funcs&#x00A0;p<a 
href="#x1-1110009.1.17">150<!--tex4ht:ref: lst:if-else-use-listing --></a>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-42-3"  
class="td11">
 <!--l. 107--><p class="noindent" >None          </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-42-4"  
class="td11">
 <!--l. 107--><p class="noindent" >None          </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-42-5"  
class="td11">
 <!--l. 108--><p class="noindent" ><span 
class="ectt-1000">pkg_</span>
 <span 
class="ectt-1000">nofetch</span>,
  <span 
class="ectt-1000">src_unpack</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">prepare</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">configure</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">compile</span>,
  <span 
class="ectt-1000">src_test</span>     </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-42-6"  
class="td11">
 <!--l. 109--><p class="noindent" ><span 
class="ectt-1000">pkg_</span>
 <span 
class="ectt-1000">nofetch</span>,
  <span 
class="ectt-1000">src_unpack</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">prepare</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">configure</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">compile</span>,
  <span 
class="ectt-1000">src_test</span>     </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-42-7"  
class="td11">
 <!--l. 110--><p class="noindent" ><span 
class="ectt-1000">pkg_</span>
 <span 
class="ectt-1000">nofetch</span>,
  <span 
class="ectt-1000">src_unpack</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">prepare</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">configure</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">compile</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">install</span>,
  <span 
class="ectt-1000">src_test</span>     </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-42-8"  
class="td11">
 <!--l. 112--><p class="noindent" ><span 
class="ectt-1000">pkg_</span>
 <span 
class="ectt-1000">nofetch</span>,
  <span 
class="ectt-1000">src_unpack</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">prepare</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">configure</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">compile</span>,
  <span 
class="ectt-1000">src_</span>
 <span 
class="ectt-1000">install</span>,
  <span 
class="ectt-1000">src_test</span>     </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-43-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-43-1"  
class="td11"> <span 
class="ectt-1000">AA                     </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-43-2"  
class="td11"> aa&#x00A0;p<a 
href="#x1-118001r1">167<!--tex4ht:ref: lst:if-else-use-listing --></a>                        </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-43-3"  
class="td11">
 <!--l. 116--><p class="noindent" >Yes            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-43-4"  
class="td11">
 <!--l. 116--><p class="noindent" >Yes            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-43-5"  
class="td11">
 <!--l. 116--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-43-6"  
class="td11">
 <!--l. 116--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-43-7"  
class="td11">
 <!--l. 116--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-43-8"  
class="td11">
 <!--l. 116--><p class="noindent" >No                </p></td>
                                                                                                                                                                                                                               
                                                                            
                                                                            
                                                                            </tr><tr  
 style="vertical-align:baseline;" id="TBL-45-44-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-44-1"  
class="td11"> <span 
class="ectt-1000">KV                     </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-44-2"  
class="td11"> kv&#x00A0;p<a 
href="#x1-118001r1">171<!--tex4ht:ref: lst:if-else-use-listing --></a>                        </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-44-3"  
class="td11">
 <!--l. 119--><p class="noindent" >Yes            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-44-4"  
class="td11">
 <!--l. 119--><p class="noindent" >Yes            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-44-5"  
class="td11">
 <!--l. 119--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-44-6"  
class="td11">
 <!--l. 119--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-44-7"  
class="td11">
 <!--l. 119--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-44-8"  
class="td11">
 <!--l. 119--><p class="noindent" >No                </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-45-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-45-1"  
class="td11"> <span 
class="ectt-1000">EBUILD_PHASE_FUNC      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-45-2"  
class="td11"> ebuild-phase-func&#x00A0;p<a 
href="#x1-118001r1">170<!--tex4ht:ref: lst:if-else-use-listing --></a>     </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-45-3"  
class="td11">
 <!--l. 122--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-45-4"  
class="td11">
 <!--l. 122--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-45-5"  
class="td11">
 <!--l. 122--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-45-6"  
class="td11">
 <!--l. 122--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-45-7"  
class="td11">
 <!--l. 122--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-45-8"  
class="td11">
 <!--l. 122--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-46-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-46-1"  
class="td11"> <span 
class="ectt-1000">MERGE_TYPE             </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-46-2"  
class="td11"> merge-type&#x00A0;p<a 
href="#x1-118001r1">171<!--tex4ht:ref: lst:if-else-use-listing --></a>             </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-46-3"  
class="td11">
 <!--l. 125--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-46-4"  
class="td11">
 <!--l. 125--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-46-5"  
class="td11">
 <!--l. 125--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-46-6"  
class="td11">
 <!--l. 125--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-46-7"  
class="td11">
 <!--l. 125--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-46-8"  
class="td11">
 <!--l. 125--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-47-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-47-1"  
class="td11"> Profile <span 
class="ectt-1000">IUSE </span>injection        </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-47-2"  
class="td11"> profile-iuse-inject&#x00A0;p<a 
href="#x1-11900011.1.1">182<!--tex4ht:ref: lst:if-else-use-listing --></a>     </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-47-3"  
class="td11">
 <!--l. 128--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-47-4"  
class="td11">
 <!--l. 128--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-47-5"  
class="td11">
 <!--l. 128--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-47-6"  
class="td11">
 <!--l. 128--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-47-7"  
class="td11">
 <!--l. 128--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-47-8"  
class="td11">
 <!--l. 128--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-48-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-48-1"  
class="td11"> <span 
class="ectt-1000">REPLACING_VERSIONS     </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-48-2"  
class="td11"> replace-version-vars&#x00A0;p<a 
href="#x1-12000011.1.2">183<!--tex4ht:ref: lst:if-else-use-listing --></a>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-48-3"  
class="td11">
 <!--l. 131--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-48-4"  
class="td11">
 <!--l. 131--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-48-5"  
class="td11">
 <!--l. 131--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-48-6"  
class="td11">
 <!--l. 131--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-48-7"  
class="td11">
 <!--l. 131--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-48-8"  
class="td11">
 <!--l. 131--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-49-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-49-1"  
class="td11"> <span 
class="ectt-1000">REPLACED_BY_VERSION    </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-49-2"  
class="td11"> replace-version-vars&#x00A0;p<a 
href="#x1-12000011.1.2">183<!--tex4ht:ref: lst:if-else-use-listing --></a>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-49-3"  
class="td11">
 <!--l. 134--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-49-4"  
class="td11">
 <!--l. 134--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-49-5"  
class="td11">
 <!--l. 134--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-49-6"  
class="td11">
 <!--l. 134--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-49-7"  
class="td11">
 <!--l. 134--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-49-8"  
class="td11">
 <!--l. 134--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-50-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-50-1"  
class="td11"> <span 
class="ectt-1000">EPREFIX</span>, <span 
class="ectt-1000">ED</span>, <span 
class="ectt-1000">EROOT      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-50-2"  
class="td11"> offset-prefix-vars&#x00A0;p<a 
href="#x1-12100011.1.3">186<!--tex4ht:ref: lst:if-else-use-listing --></a>      </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-50-3"  
class="td11">
 <!--l. 137--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-50-4"  
class="td11">
 <!--l. 137--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-50-5"  
class="td11">
 <!--l. 137--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-50-6"  
class="td11">
 <!--l. 137--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-50-7"  
class="td11">
 <!--l. 137--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-50-8"  
class="td11">
 <!--l. 137--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-51-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-51-1"  
class="td11"> <span 
class="ectt-1000">find </span>is GNU?                 </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-51-2"  
class="td11"> gnu-find&#x00A0;p<a 
href="#x1-12600011.3.1.1">189<!--tex4ht:ref: lst:if-else-use-listing --></a>                 </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-51-3"  
class="td11">
 <!--l. 140--><p class="noindent" >Undefined    </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-51-4"  
class="td11">
 <!--l. 140--><p class="noindent" >Undefined    </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-51-5"  
class="td11">
 <!--l. 140--><p class="noindent" >Undefined       </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-51-6"  
class="td11">
 <!--l. 140--><p class="noindent" >Undefined       </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-51-7"  
class="td11">
 <!--l. 140--><p class="noindent" >Undefined       </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-51-8"  
class="td11">
 <!--l. 140--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-52-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-52-1"  
class="td11"> Most utilities die             </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-52-2"  
class="td11"> die-on-failure&#x00A0;p<a 
href="#x1-12900011.3.3.1">192<!--tex4ht:ref: lst:if-else-use-listing --></a>          </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-52-3"  
class="td11">
 <!--l. 143--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-52-4"  
class="td11">
 <!--l. 143--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-52-5"  
class="td11">
 <!--l. 143--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-52-6"  
class="td11">
 <!--l. 143--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-52-7"  
class="td11">
 <!--l. 143--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-52-8"  
class="td11">
 <!--l. 143--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-53-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-53-1"  
class="td11"> <span 
class="ectt-1000">nonfatal               </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-53-2"  
class="td11"> nonfatal&#x00A0;p<a 
href="#x1-12900011.3.3.1">192<!--tex4ht:ref: lst:if-else-use-listing --></a>                 </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-53-3"  
class="td11">
 <!--l. 146--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-53-4"  
class="td11">
 <!--l. 146--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-53-5"  
class="td11">
 <!--l. 146--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-53-6"  
class="td11">
 <!--l. 146--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-53-7"  
class="td11">
 <!--l. 146--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-53-8"  
class="td11">
 <!--l. 146--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-54-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-54-1"  
class="td11"> <span 
class="ectt-1000">dohard                 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-54-2"  
class="td11"> banned-commands&#x00A0;p<a 
href="#x1-13000011.3.3.2">195<!--tex4ht:ref: lst:if-else-use-listing --></a>   </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-54-3"  
class="td11">
 <!--l. 149--><p class="noindent" >Yes            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-54-4"  
class="td11">
 <!--l. 149--><p class="noindent" >Yes            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-54-5"  
class="td11">
 <!--l. 149--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-54-6"  
class="td11">
 <!--l. 149--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-54-7"  
class="td11">
 <!--l. 149--><p class="noindent" >Banned          </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-54-8"  
class="td11">
 <!--l. 149--><p class="noindent" >Banned          </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-55-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-55-1"  
class="td11"> <span 
class="ectt-1000">dosed                  </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-55-2"  
class="td11"> banned-commands&#x00A0;p<a 
href="#x1-13000011.3.3.2">195<!--tex4ht:ref: lst:if-else-use-listing --></a>   </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-55-3"  
class="td11">
 <!--l. 152--><p class="noindent" >Yes            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-55-4"  
class="td11">
 <!--l. 152--><p class="noindent" >Yes            </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-55-5"  
class="td11">
 <!--l. 152--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-55-6"  
class="td11">
 <!--l. 152--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-55-7"  
class="td11">
 <!--l. 152--><p class="noindent" >Banned          </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-55-8"  
class="td11">
 <!--l. 152--><p class="noindent" >Banned          </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-56-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-56-1"  
class="td11"> Option <span 
class="ectt-1000">--host-root     </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-56-2"  
class="td11"> host-root-option&#x00A0;p<a 
href="#x1-13200011.3.3.4">198<!--tex4ht:ref: lst:if-else-use-listing --></a>      </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-56-3"  
class="td11">
 <!--l. 155--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-56-4"  
class="td11">
 <!--l. 155--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-56-5"  
class="td11">
 <!--l. 155--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-56-6"  
class="td11">
 <!--l. 155--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-56-7"  
class="td11">
 <!--l. 155--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-56-8"  
class="td11">
 <!--l. 155--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-57-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-57-1"  
class="td11"> <span 
class="ectt-1000">econf </span>arguments             </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-57-2"  
class="td11"> econf-options&#x00A0;p<a 
href="#x1-13500011.3.3.7">199<!--tex4ht:ref: lst:if-else-use-listing --></a>          </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-57-3"  
class="td11">
 <!--l. 158--><p class="noindent" >           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-57-4"  
class="td11">
 <!--l. 158--><p class="noindent" >           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-57-5"  
class="td11">
 <!--l. 158--><p class="noindent" >             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-57-6"  
class="td11">
 <!--l. 158--><p class="noindent" >             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-57-7"  
class="td11">
 <!--l. 158--><p class="noindent" >disable
  dependency
  tracking         </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-57-8"  
class="td11">
 <!--l. 158--><p class="noindent" >disable
  dependency
  tracking,
  disable
  silent
  rules              </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-58-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-58-1"  
class="td11"> <span 
class="ectt-1000">dodoc -r               </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-58-2"  
class="td11"> dodoc&#x00A0;p<a 
href="#x1-13600011.3.3.8">202<!--tex4ht:ref: lst:if-else-use-listing --></a>                    </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-58-3"  
class="td11">
 <!--l. 161--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-58-4"  
class="td11">
 <!--l. 161--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-58-5"  
class="td11">
 <!--l. 161--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-58-6"  
class="td11">
 <!--l. 161--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-58-7"  
class="td11">
 <!--l. 161--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-58-8"  
class="td11">
 <!--l. 161--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-59-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-59-1"  
class="td11"> <span 
class="ectt-1000">doheader               </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-59-2"  
class="td11"> doheader&#x00A0;p<a 
href="#x1-13600011.3.3.8">203<!--tex4ht:ref: lst:if-else-use-listing --></a>                </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-59-3"  
class="td11">
 <!--l. 164--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-59-4"  
class="td11">
 <!--l. 164--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-59-5"  
class="td11">
 <!--l. 164--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-59-6"  
class="td11">
 <!--l. 164--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-59-7"  
class="td11">
 <!--l. 164--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-59-8"  
class="td11">
 <!--l. 164--><p class="noindent" >Yes               </p></td>
                                                                                                                                                                                                                               
                                                                            
                                                                            
                                                                            </tr><tr  
 style="vertical-align:baseline;" id="TBL-45-60-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-60-1"  
class="td11"> <span 
class="ectt-1000">doins </span>handles symlinks     </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-60-2"  
class="td11"> doins&#x00A0;p<a 
href="#x1-13600011.3.3.8">204<!--tex4ht:ref: lst:if-else-use-listing --></a>                     </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-60-3"  
class="td11">
 <!--l. 167--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-60-4"  
class="td11">
 <!--l. 167--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-60-5"  
class="td11">
 <!--l. 167--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-60-6"  
class="td11">
 <!--l. 167--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-60-7"  
class="td11">
 <!--l. 167--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-60-8"  
class="td11">
 <!--l. 167--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-61-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-61-1"  
class="td11">                        </td></tr>
<tr  
 style="vertical-align:baseline;" id="TBL-45-62-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-62-1"  
class="td11"> <span 
class="ectt-1000">doman </span>languages               </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-62-2"  
class="td11"> doman-langs&#x00A0;p<a 
href="#x1-13600011.3.3.8">205<!--tex4ht:ref: lst:if-else-use-listing --></a>         </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-62-3"  
class="td11">
 <!--l. 170--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-62-4"  
class="td11">
 <!--l. 170--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-62-5"  
class="td11">
 <!--l. 170--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-62-6"  
class="td11">
 <!--l. 170--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-62-7"  
class="td11">
 <!--l. 170--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-62-8"  
class="td11">
 <!--l. 170--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-63-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-63-1"  
class="td11"> <span 
class="ectt-1000">doman -i18n </span>precedence    </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-63-2"  
class="td11"> doman-langs&#x00A0;p<a 
href="#x1-13600011.3.3.8">205<!--tex4ht:ref: lst:if-else-use-listing --></a>         </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-63-3"  
class="td11">
 <!--l. 173--><p class="noindent" >N/A           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-63-4"  
class="td11">
 <!--l. 173--><p class="noindent" >N/A           </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-63-5"  
class="td11">
 <!--l. 173--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-63-6"  
class="td11">
 <!--l. 173--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-63-7"  
class="td11">
 <!--l. 173--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-63-8"  
class="td11">
 <!--l. 173--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-64-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-64-1"  
class="td11"> <span 
class="ectt-1000">new* </span>support stdin           </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-64-2"  
class="td11"> newfoo-stdin&#x00A0;p<a 
href="#x1-13600011.3.3.8">205<!--tex4ht:ref: lst:if-else-use-listing --></a>         </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-64-3"  
class="td11">
 <!--l. 176--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-64-4"  
class="td11">
 <!--l. 176--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-64-5"  
class="td11">
 <!--l. 176--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-64-6"  
class="td11">
 <!--l. 176--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-64-7"  
class="td11">
 <!--l. 176--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-64-8"  
class="td11">
 <!--l. 176--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-65-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-65-1"  
class="td11"> Controllable compression   </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-65-2"  
class="td11"> docompress&#x00A0;p<a 
href="#x1-13800011.3.3.10">224<!--tex4ht:ref: lst:if-else-use-listing --></a>          </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-65-3"  
class="td11">
 <!--l. 179--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-65-4"  
class="td11">
 <!--l. 179--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-65-5"  
class="td11">
 <!--l. 179--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-65-6"  
class="td11">
 <!--l. 179--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-65-7"  
class="td11">
 <!--l. 179--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-65-8"  
class="td11">
 <!--l. 179--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-66-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-66-1"  
class="td11"> <span 
class="ectt-1000">docompress             </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-66-2"  
class="td11"> docompress&#x00A0;p<a 
href="#x1-13800011.3.3.10">224<!--tex4ht:ref: lst:if-else-use-listing --></a>          </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-66-3"  
class="td11">
 <!--l. 182--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-66-4"  
class="td11">
 <!--l. 182--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-66-5"  
class="td11">
 <!--l. 182--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-66-6"  
class="td11">
 <!--l. 182--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-66-7"  
class="td11">
 <!--l. 182--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-66-8"  
class="td11">
 <!--l. 182--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-67-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-67-1"  
class="td11"> <span 
class="ectt-1000">use_with </span>empty third arg  </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-67-2"  
class="td11"> use-with&#x00A0;p<a 
href="#x1-13900011.3.3.11">228<!--tex4ht:ref: lst:if-else-use-listing --></a>               </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-67-3"  
class="td11">
 <!--l. 185--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-67-4"  
class="td11">
 <!--l. 185--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-67-5"  
class="td11">
 <!--l. 185--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-67-6"  
class="td11">
 <!--l. 185--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-67-7"  
class="td11">
 <!--l. 185--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-67-8"  
class="td11">
 <!--l. 185--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-68-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-68-1"  
class="td11"> <span 
class="ectt-1000">usex                   </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-68-2"  
class="td11"> usex&#x00A0;p<a 
href="#x1-13900011.3.3.11">228<!--tex4ht:ref: lst:if-else-use-listing --></a>                    </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-68-3"  
class="td11">
 <!--l. 188--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-68-4"  
class="td11">
 <!--l. 188--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-68-5"  
class="td11">
 <!--l. 188--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-68-6"  
class="td11">
 <!--l. 188--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-68-7"  
class="td11">
 <!--l. 188--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-68-8"  
class="td11">
 <!--l. 188--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-69-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-69-1"  
class="td11"> <span 
class="ectt-1000">unpack </span>support for <span 
class="ectt-1000">xz</span>?      </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-69-2"  
class="td11"> unpack-extensions&#x00A0;p<a 
href="#x1-14100011.3.3.13">237<!--tex4ht:ref: lst:if-else-use-listing --></a>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-69-3"  
class="td11">
 <!--l. 191--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-69-4"  
class="td11">
 <!--l. 191--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-69-5"  
class="td11">
 <!--l. 191--><p class="noindent" >No                </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-69-6"  
class="td11">
 <!--l. 191--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-69-7"  
class="td11">
 <!--l. 191--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-69-8"  
class="td11">
 <!--l. 191--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-70-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-70-1"  
class="td11"> <span 
class="ectt-1000">default </span>function             </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-70-2"  
class="td11"> default-func&#x00A0;p<a 
href="#x1-14100011.3.3.13">239<!--tex4ht:ref: lst:if-else-use-listing --></a>          </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-70-3"  
class="td11">
 <!--l. 194--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-70-4"  
class="td11">
 <!--l. 194--><p class="noindent" >No             </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-70-5"  
class="td11">
 <!--l. 194--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-70-6"  
class="td11">
 <!--l. 194--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-70-7"  
class="td11">
 <!--l. 194--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-70-8"  
class="td11">
 <!--l. 194--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-71-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-71-1"  
class="td11"> File mtimes preserved       </td><td  style="white-space:nowrap; text-align:left;" id="TBL-45-71-2"  
class="td11"> mtime-preserve&#x00A0;p<a 
href="#x1-15300012.3.2">247<!--tex4ht:ref: lst:if-else-use-listing --></a>      </td><td  style="white-space:wrap; text-align:left;" id="TBL-45-71-3"  
class="td11">
 <!--l. 197--><p class="noindent" >Undefined    </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-71-4"  
class="td11">
 <!--l. 197--><p class="noindent" >Undefined    </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-71-5"  
class="td11">
 <!--l. 197--><p class="noindent" >Undefined       </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-71-6"  
class="td11">
 <!--l. 197--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-71-7"  
class="td11">
 <!--l. 197--><p class="noindent" >Yes               </p></td><td  style="white-space:wrap; text-align:left;" id="TBL-45-71-8"  
class="td11">
 <!--l. 197--><p class="noindent" >Yes               </p></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-72-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-72-1"  
class="td11">                        </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-45-73-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-73-1"  
class="td11"></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-74-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-74-1"  
class="td11">                        </td></tr><tr  
 style="vertical-align:baseline;" id="TBL-45-75-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-75-1"  
class="td11"></td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-76-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-76-1"  
class="td11">                        </td></tr>
<tr  
 style="vertical-align:baseline;" id="TBL-45-17-"><td colspan="6" style="white-space:nowrap; text-align:left;" id="TBL-45-17-1"  
class="td11"></td><!--cmidrule--></tr><tr  
 style="vertical-align:baseline;" id="TBL-45-18-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-18-1"  
class="td11">  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-45-19-"><td  style="white-space:nowrap; text-align:left;" id="TBL-45-19-1"  
class="td11">  </td></tr>
</table></div>
                                                                                                                                              
                                                                            
                                                                            
                                                                            
                                                                            
<a 
 id="x1-171003r218"></a>
<h2 class="appendixHead"><span class="titlemark">Appendix&#x00A0;E</span><br /><a 
 id="x1-172000E"></a>Differences Between EAPIs</h2>
<!--l. 204--><p class="nopar" ><span class="paragraphHead"><a 
 id="x1-173000E"></a><span 
class="ecbx-1000">Note:</span></span>
This chapter is informative and for convenience only. Refer to the main text for specifics.
</p><!--l. 206--><p class="nopar" >
</p>
<h3 class="likesectionHead"><a 
 id="x1-174000E"></a>EAPI 0</h3>
<!--l. 208--><p class="nopar" >EAPI 0 is the base EAPI.
</p><!--l. 210--><p class="nopar" >
</p>
<h3 class="likesectionHead"><a 
 id="x1-175000E"></a>EAPI 1</h3>
<!--l. 212--><p class="nopar" >EAPI 1 is EAPI 0 with the following changes:
</p><!--l. 215--><p class="noindent" >
     </p><ul>
     <li class="compactitem"><span 
class="ectt-1000">IUSE </span>defaults, <span 
class="eccc-1000"><span 
class="small-caps">I</span><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">U</span><span 
class="small-caps">L</span><span 
class="small-caps">T</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-670007.3">77<!--tex4ht:ref: feat:iuse-defaults --></a>.
     </li>
     <li class="compactitem">Slot dependencies, <span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">L</span><span 
class="small-caps">O</span><span 
class="small-caps">T</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-860008.2.6.3">114<!--tex4ht:ref: feat:slot-deps --></a>.
     </li>
     <li class="compactitem">Different <span 
class="ectt-1000">src_compile </span>implementation, <span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">P</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span>-1 </span>on page&#x00A0;<a 
href="#x1-1010009.1.7">134<!--tex4ht:ref: feat:src-compile-1 --></a>.</li></ul>
<!--l. 220--><p class="nopar" >
</p>
<h3 class="likesectionHead"><a 
 id="x1-176000E"></a>EAPI 2</h3>
<!--l. 222--><p class="nopar" >EAPI 2 is EAPI 1 with the following changes:
</p><!--l. 225--><p class="noindent" >
     </p><ul>
     <li class="compactitem">Use dependencies, <span 
class="eccc-1000"><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-820008.2.6">105<!--tex4ht:ref: feat:use-deps --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">! </span>and <span 
class="ectt-1000">!! </span>blockers, <span 
class="eccc-1000"><span 
class="small-caps">B</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span><span 
class="small-caps">G</span>-<span 
class="small-caps">S</span><span 
class="small-caps">T</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">N</span><span 
class="small-caps">G</span><span 
class="small-caps">T</span><span 
class="small-caps">H</span> </span>on page&#x00A0;<a 
href="#x1-850008.2.6.2">111<!--tex4ht:ref: feat:bang-strength --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">SRC_URI </span>arrows, <span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">U</span><span 
class="small-caps">R</span><span 
class="small-caps">I</span>-<span 
class="small-caps">A</span><span 
class="small-caps">R</span><span 
class="small-caps">R</span><span 
class="small-caps">O</span><span 
class="small-caps">W</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-920008.2.10">116<!--tex4ht:ref: feat:src-uri-arrows --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_prepare</span>, <span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">A</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span> </span>on page&#x00A0;<a 
href="#x1-990009.1.5">126<!--tex4ht:ref: feat:src-prepare --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_configure</span>, <span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">F</span><span 
class="small-caps">I</span><span 
class="small-caps">G</span><span 
class="small-caps">U</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span> </span>on page&#x00A0;<a 
href="#x1-1000009.1.6">129<!--tex4ht:ref: feat:src-configure --></a>.
     </li>
     <li class="compactitem">Different <span 
class="ectt-1000">src_compile </span>implementation, <span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">P</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span>-2 </span>on page&#x00A0;<a 
href="#x1-1010009.1.7">135<!--tex4ht:ref: feat:src-compile-2 --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">default_ </span>phase functions for phases <span 
class="ectt-1000">pkg_nofetch</span>, <span 
class="ectt-1000">src_unpack</span>, <span 
class="ectt-1000">src_prepare</span>, <span 
class="ectt-1000">src_</span>
     <span 
class="ectt-1000">configure</span>, <span 
class="ectt-1000">src_compile </span>and <span 
class="ectt-1000">src_test</span>; <span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">U</span><span 
class="small-caps">L</span><span 
class="small-caps">T</span>-<span 
class="small-caps">P</span><span 
class="small-caps">H</span><span 
class="small-caps">A</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">F</span><span 
class="small-caps">U</span><span 
class="small-caps">N</span><span 
class="small-caps">C</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-1110009.1.17">150<!--tex4ht:ref: feat:default-phase-funcs --></a>.
                                                                            
                                                                            
     </li>
     <li class="compactitem"><span 
class="ectt-1000">doman </span>language detection by filename, <span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span>-<span 
class="small-caps">L</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span><span 
class="small-caps">G</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-13600011.3.3.8">205<!--tex4ht:ref: feat:doman-langs --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">default </span>function, <span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">U</span><span 
class="small-caps">L</span><span 
class="small-caps">T</span>-<span 
class="small-caps">F</span><span 
class="small-caps">U</span><span 
class="small-caps">N</span><span 
class="small-caps">C</span> </span>on page&#x00A0;<a 
href="#x1-14100011.3.3.13">239<!--tex4ht:ref: feat:default-func --></a>.</li></ul>
<!--l. 237--><p class="nopar" >
</p>
<h3 class="likesectionHead"><a 
 id="x1-177000E"></a>EAPI 3</h3>
<!--l. 239--><p class="nopar" >EAPI 3 is EAPI 2 with the following changes:
     </p><ul>
     <li class="compactitem">Offset-prefix support by definition of <span 
class="ectt-1000">EPREFIX</span>, <span 
class="ectt-1000">ED </span>and <span 
class="ectt-1000">EROOT</span>, <span 
class="eccc-1000"><span 
class="small-caps">O</span><span 
class="small-caps">F</span><span 
class="small-caps">F</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span><span 
class="small-caps">T</span>-<span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">I</span><span 
class="small-caps">X</span>-<span 
class="small-caps">V</span><span 
class="small-caps">A</span><span 
class="small-caps">R</span><span 
class="small-caps">S</span></span>
     on page&#x00A0;<a 
href="#x1-12100011.1.3">186<!--tex4ht:ref: feat:offset-prefix-vars --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">unpack </span>supports <span 
class="ectt-1000">.xz </span>and <span 
class="ectt-1000">.tar.xz</span>, <span 
class="eccc-1000"><span 
class="small-caps">U</span><span 
class="small-caps">N</span><span 
class="small-caps">P</span><span 
class="small-caps">A</span><span 
class="small-caps">C</span><span 
class="small-caps">K</span>-<span 
class="small-caps">E</span><span 
class="small-caps">X</span><span 
class="small-caps">T</span><span 
class="small-caps">E</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span><span 
class="small-caps">I</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-14100011.3.3.13">237<!--tex4ht:ref: feat:unpack-extensions --></a>.
     </li>
     <li class="compactitem">File modification times are preserved, <span 
class="eccc-1000"><span 
class="small-caps">M</span><span 
class="small-caps">T</span><span 
class="small-caps">I</span><span 
class="small-caps">M</span><span 
class="small-caps">E</span>-<span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span><span 
class="small-caps">V</span><span 
class="small-caps">E</span> </span>on page&#x00A0;<a 
href="#x1-15300012.3.2">247<!--tex4ht:ref: feat:mtime-preserve --></a>.</li></ul>
<!--l. 247--><p class="nopar" >
</p>
<h3 class="likesectionHead"><a 
 id="x1-178000E"></a>EAPI 4</h3>
<!--l. 249--><p class="nopar" >EAPI 4 is EAPI 3 with the following changes:
</p><!--l. 252--><p class="noindent" >
     </p><ul>
     <li class="compactitem"><span 
class="ectt-1000">PROPERTIES </span>support is mandatory, <span 
class="eccc-1000"><span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">O</span><span 
class="small-caps">P</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span><span 
class="small-caps">T</span><span 
class="small-caps">I</span><span 
class="small-caps">E</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-670007.3">77<!--tex4ht:ref: feat:properties --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">REQUIRED_USE</span>, <span 
class="eccc-1000"><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">Q</span><span 
class="small-caps">U</span><span 
class="small-caps">I</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">D</span>-<span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span> </span>on page&#x00A0;<a 
href="#x1-670007.3">77<!--tex4ht:ref: feat:required-use --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">RDEPEND=DEPEND </span>no longer done, <span 
class="eccc-1000"><span 
class="small-caps">R</span><span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">E</span><span 
class="small-caps">N</span><span 
class="small-caps">D</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">E</span><span 
class="small-caps">N</span><span 
class="small-caps">D</span> </span>on page&#x00A0;<a 
href="#x1-700007.3.3">84<!--tex4ht:ref: feat:rdepend-depend --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">DEFINED_PHASES </span>support is mandatory, <span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">E</span><span 
class="small-caps">D</span>-<span 
class="small-caps">P</span><span 
class="small-caps">H</span><span 
class="small-caps">A</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-720007.4">88<!--tex4ht:ref: feat:defined-phases --></a>.
     </li>
     <li class="compactitem">Use dependency defaults, <span 
class="eccc-1000"><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">U</span><span 
class="small-caps">L</span><span 
class="small-caps">T</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-870008.2.6.4">115<!--tex4ht:ref: feat:use-dep-defaults --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">S </span>to <span 
class="ectt-1000">WORKDIR </span>fallback restricted, <span 
class="eccc-1000"><span 
class="small-caps">S</span>-<span 
class="small-caps">W</span><span 
class="small-caps">O</span><span 
class="small-caps">R</span><span 
class="small-caps">K</span><span 
class="small-caps">D</span><span 
class="small-caps">I</span><span 
class="small-caps">R</span>-<span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">L</span><span 
class="small-caps">L</span><span 
class="small-caps">B</span><span 
class="small-caps">A</span><span 
class="small-caps">C</span><span 
class="small-caps">K</span> </span>on page&#x00A0;<a 
href="#x1-950009.1.1">119<!--tex4ht:ref: feat:s-workdir-fallback --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">pkg_pretend</span>, <span 
class="eccc-1000"><span 
class="small-caps">P</span><span 
class="small-caps">K</span><span 
class="small-caps">G</span>-<span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">T</span><span 
class="small-caps">E</span><span 
class="small-caps">N</span><span 
class="small-caps">D</span> </span>on page&#x00A0;<a 
href="#x1-960009.1.2">122<!--tex4ht:ref: feat:pkg-pretend --></a>.
     </li>
     <li class="compactitem">Default <span 
class="ectt-1000">src_install </span>no longer a no-op, <span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">R</span><span 
class="small-caps">C</span>-<span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span><span 
class="small-caps">T</span><span 
class="small-caps">A</span><span 
class="small-caps">L</span><span 
class="small-caps">L</span>-4 </span>on page&#x00A0;<a 
href="#x1-1030009.1.9">142<!--tex4ht:ref: feat:src-install-4 --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">pkg_info </span>can run on non-installed packages, <span 
class="eccc-1000"><span 
class="small-caps">P</span><span 
class="small-caps">K</span><span 
class="small-caps">G</span>-<span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">F</span><span 
class="small-caps">O</span> </span>on page&#x00A0;<a 
href="#x1-1090009.1.15">147<!--tex4ht:ref: feat:pkg-info --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">AA </span>is gone, <span 
class="eccc-1000"><span 
class="small-caps">A</span><span 
class="small-caps">A</span> </span>on page&#x00A0;<a 
href="#x1-118001r1">167<!--tex4ht:ref: feat:aa --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">KV </span>is gone, <span 
class="eccc-1000"><span 
class="small-caps">K</span><span 
class="small-caps">V</span> </span>on page&#x00A0;<a 
href="#x1-118001r1">171<!--tex4ht:ref: feat:kv --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">MERGE_TYPE</span>, <span 
class="eccc-1000"><span 
class="small-caps">M</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span><span 
class="small-caps">G</span><span 
class="small-caps">E</span>-<span 
class="small-caps">T</span><span 
class="small-caps">Y</span><span 
class="small-caps">P</span><span 
class="small-caps">E</span> </span>on page&#x00A0;<a 
href="#x1-118001r1">171<!--tex4ht:ref: feat:merge-type --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">REPLACING_VERSIONS  </span>and   <span 
class="ectt-1000">REPLACED_BY_VERSION</span>,   <span 
class="eccc-1000"><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">L</span><span 
class="small-caps">A</span><span 
class="small-caps">C</span><span 
class="small-caps">E</span>-<span 
class="small-caps">V</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span><span 
class="small-caps">S</span><span 
class="small-caps">I</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span>-<span 
class="small-caps">V</span><span 
class="small-caps">A</span><span 
class="small-caps">R</span><span 
class="small-caps">S</span>   </span>on
     page&#x00A0;<a 
href="#x1-12000011.1.2">183<!--tex4ht:ref: feat:replace-version-vars --></a>.
                                                                            
                                                                            
     </li>
     <li class="compactitem">Utilities  now  die  on  failure,  <span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">I</span><span 
class="small-caps">E</span>-<span 
class="small-caps">O</span><span 
class="small-caps">N</span>-<span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">U</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span>  </span>on  page&#x00A0;<a 
href="#x1-12900011.3.3.1">192<!--tex4ht:ref: feat:die-on-failure --></a>,  unless  called  under
     <span 
class="ectt-1000">nonfatal</span>, <span 
class="eccc-1000"><span 
class="small-caps">N</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">F</span><span 
class="small-caps">A</span><span 
class="small-caps">T</span><span 
class="small-caps">A</span><span 
class="small-caps">L</span> </span>on page&#x00A0;<a 
href="#x1-12900011.3.3.1">192<!--tex4ht:ref: feat:nonfatal --></a>
     </li>
     <li class="compactitem"><span 
class="ectt-1000">dohard</span>, <span 
class="ectt-1000">dosed </span>banned, <span 
class="eccc-1000"><span 
class="small-caps">B</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span><span 
class="small-caps">N</span><span 
class="small-caps">E</span><span 
class="small-caps">D</span>-<span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">M</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span><span 
class="small-caps">D</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-13000011.3.3.2">195<!--tex4ht:ref: feat:banned-commands --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">econf </span>adds <span 
class="ectt-1000">--disable-dependency-tracking</span>, <span 
class="eccc-1000"><span 
class="small-caps">E</span><span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">F</span>-<span 
class="small-caps">O</span><span 
class="small-caps">P</span><span 
class="small-caps">T</span><span 
class="small-caps">I</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-13500011.3.3.7">199<!--tex4ht:ref: feat:econf-options --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">dodoc -r </span>support, <span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">C</span> </span>on page&#x00A0;<a 
href="#x1-13600011.3.3.8">202<!--tex4ht:ref: feat:dodoc --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">doins </span>supports symlinks, <span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-13600011.3.3.8">204<!--tex4ht:ref: feat:doins --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">doman -i18n </span>option takes precedence, <span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span>-<span 
class="small-caps">L</span><span 
class="small-caps">A</span><span 
class="small-caps">N</span><span 
class="small-caps">G</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-13600011.3.3.8">205<!--tex4ht:ref: feat:doman-langs --></a>.
     </li>
     <li class="compactitem">Controllable compression and <span 
class="ectt-1000">docompress</span>, <span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">M</span><span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">E</span><span 
class="small-caps">S</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-13800011.3.3.10">224<!--tex4ht:ref: feat:docompress --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">use_with </span>and <span 
class="ectt-1000">use_enable </span>support empty third argument, <span 
class="eccc-1000"><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">W</span><span 
class="small-caps">I</span><span 
class="small-caps">T</span><span 
class="small-caps">H</span> </span>on page&#x00A0;<a 
href="#x1-13900011.3.3.11">228<!--tex4ht:ref: feat:use-with --></a>.</li></ul>
<!--l. 276--><p class="nopar" >
</p>
<h3 class="likesectionHead"><a 
 id="x1-179000E"></a>EAPI 5</h3>
<!--l. 278--><p class="nopar" >EAPI 5 is EAPI 4 with the following changes:
</p><!--l. 281--><p class="noindent" >
     </p><ul>
     <li class="compactitem">Stable use masking and forcing, <span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">T</span><span 
class="small-caps">A</span><span 
class="small-caps">B</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span><span 
class="small-caps">M</span><span 
class="small-caps">A</span><span 
class="small-caps">S</span><span 
class="small-caps">K</span> </span>on page&#x00A0;<a 
href="#x1-580005.2.11">59<!--tex4ht:ref: feat:stablemask --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">REQUIRED_USE </span>now supports <span 
class="ectt-1000">?? </span>groups, <span 
class="eccc-1000"><span 
class="small-caps">A</span><span 
class="small-caps">T</span>-<span 
class="small-caps">M</span><span 
class="small-caps">O</span><span 
class="small-caps">S</span><span 
class="small-caps">T</span>-<span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">E</span>-<span 
class="small-caps">O</span><span 
class="small-caps">F</span> </span>on page&#x00A0;<a 
href="#x1-760008.2">98<!--tex4ht:ref: feat:at-most-one-of --></a>.
     </li>
     <li class="compactitem">Slot operator dependencies, <span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">L</span><span 
class="small-caps">O</span><span 
class="small-caps">T</span>-<span 
class="small-caps">O</span><span 
class="small-caps">P</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span><span 
class="small-caps">A</span><span 
class="small-caps">T</span><span 
class="small-caps">O</span><span 
class="small-caps">R</span>-<span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">P</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-860008.2.6.3">114<!--tex4ht:ref: feat:slot-operator-deps --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">SLOT </span>now supports an optional sub-slot part, <span 
class="eccc-1000"><span 
class="small-caps">S</span><span 
class="small-caps">U</span><span 
class="small-caps">B</span>-<span 
class="small-caps">S</span><span 
class="small-caps">L</span><span 
class="small-caps">O</span><span 
class="small-caps">T</span> </span>on page&#x00A0;<a 
href="#x1-860008.2.6.3">114<!--tex4ht:ref: feat:sub-slot --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">src_test </span>supports parallel tests, <span 
class="eccc-1000"><span 
class="small-caps">P</span><span 
class="small-caps">A</span><span 
class="small-caps">R</span><span 
class="small-caps">A</span><span 
class="small-caps">L</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span><span 
class="small-caps">L</span>-<span 
class="small-caps">T</span><span 
class="small-caps">E</span><span 
class="small-caps">S</span><span 
class="small-caps">T</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-1020009.1.8">139<!--tex4ht:ref: feat:parallel-tests --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">EBUILD_PHASE_FUNC</span>, <span 
class="eccc-1000"><span 
class="small-caps">E</span><span 
class="small-caps">B</span><span 
class="small-caps">U</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">D</span>-<span 
class="small-caps">P</span><span 
class="small-caps">H</span><span 
class="small-caps">A</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">F</span><span 
class="small-caps">U</span><span 
class="small-caps">N</span><span 
class="small-caps">C</span> </span>on page&#x00A0;<a 
href="#x1-118001r1">170<!--tex4ht:ref: feat:ebuild-phase-func --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">USE </span>is calculated differently, <span 
class="eccc-1000"><span 
class="small-caps">P</span><span 
class="small-caps">R</span><span 
class="small-caps">O</span><span 
class="small-caps">F</span><span 
class="small-caps">I</span><span 
class="small-caps">L</span><span 
class="small-caps">E</span>-<span 
class="small-caps">I</span><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span>-<span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">J</span><span 
class="small-caps">E</span><span 
class="small-caps">C</span><span 
class="small-caps">T</span> </span>on page&#x00A0;<a 
href="#x1-11900011.1.1">182<!--tex4ht:ref: feat:profile-iuse-inject --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">find </span>is guaranteed to be GNU, <span 
class="eccc-1000"><span 
class="small-caps">G</span><span 
class="small-caps">N</span><span 
class="small-caps">U</span>-<span 
class="small-caps">F</span><span 
class="small-caps">I</span><span 
class="small-caps">N</span><span 
class="small-caps">D</span> </span>on page&#x00A0;<a 
href="#x1-12600011.3.1.1">189<!--tex4ht:ref: feat:gnu-find --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">best_version   </span>and     <span 
class="ectt-1000">has_version   </span>support     the     <span 
class="ectt-1000">--host-root   </span>option,
     <span 
class="eccc-1000"><span 
class="small-caps">H</span><span 
class="small-caps">O</span><span 
class="small-caps">S</span><span 
class="small-caps">T</span>-<span 
class="small-caps">R</span><span 
class="small-caps">O</span><span 
class="small-caps">O</span><span 
class="small-caps">T</span>-<span 
class="small-caps">O</span><span 
class="small-caps">P</span><span 
class="small-caps">T</span><span 
class="small-caps">I</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span> </span>on page&#x00A0;<a 
href="#x1-13200011.3.3.4">198<!--tex4ht:ref: feat:host-root-option --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">econf </span>adds <span 
class="ectt-1000">--disable-silent-rules</span>, <span 
class="eccc-1000"><span 
class="small-caps">E</span><span 
class="small-caps">C</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">F</span>-<span 
class="small-caps">O</span><span 
class="small-caps">P</span><span 
class="small-caps">T</span><span 
class="small-caps">I</span><span 
class="small-caps">O</span><span 
class="small-caps">N</span><span 
class="small-caps">S</span> </span>on page&#x00A0;<a 
href="#x1-13500011.3.3.7">199<!--tex4ht:ref: feat:econf-options --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">doheader </span>and <span 
class="ectt-1000">newheader </span>support, <span 
class="eccc-1000"><span 
class="small-caps">D</span><span 
class="small-caps">O</span><span 
class="small-caps">H</span><span 
class="small-caps">E</span><span 
class="small-caps">A</span><span 
class="small-caps">D</span><span 
class="small-caps">E</span><span 
class="small-caps">R</span> </span>on page&#x00A0;<a 
href="#x1-13600011.3.3.8">203<!--tex4ht:ref: feat:doheader --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">new* </span>can read from standard input, <span 
class="eccc-1000"><span 
class="small-caps">N</span><span 
class="small-caps">E</span><span 
class="small-caps">W</span><span 
class="small-caps">F</span><span 
class="small-caps">O</span><span 
class="small-caps">O</span>-<span 
class="small-caps">S</span><span 
class="small-caps">T</span><span 
class="small-caps">D</span><span 
class="small-caps">I</span><span 
class="small-caps">N</span> </span>on page&#x00A0;<a 
href="#x1-13600011.3.3.8">205<!--tex4ht:ref: feat:newfoo-stdin --></a>.
     </li>
     <li class="compactitem"><span 
class="ectt-1000">usex </span>support, <span 
class="eccc-1000"><span 
class="small-caps">U</span><span 
class="small-caps">S</span><span 
class="small-caps">E</span><span 
class="small-caps">X</span> </span>on page&#x00A0;<a 
href="#x1-13900011.3.3.11">228<!--tex4ht:ref: feat:usex --></a>.</li></ul>
                                                                            
                                                                            
                                                                            
                                                                            
<h2 class="likechapterHead"><a 
 id="x1-180000E"></a>Bibliography</h2>
   <div class="thebibliography">
   <p class="bibitem" ><span class="biblabel">
 [1]<span class="bibsp">&#x00A0;&#x00A0;&#x00A0;</span></span><a 
 id="XGlep44"></a>Marius        Mauch.                       GLEP        44:        Manifest2        format.
   <a 
href="http://glep.gentoo.org/glep-0044.html" class="url" ><span 
class="ectt-1000">http://glep.gentoo.org/glep-0044.html</span></a>, December 2005.
   </p>
   <p class="bibitem" ><span class="biblabel">
 [2]<span class="bibsp">&#x00A0;&#x00A0;&#x00A0;</span></span><a 
 id="XGlep37"></a>Jason        Stubbs.                      GLEP        37:        Virtuals        deprecation.
   <a 
href="http://glep.gentoo.org/glep-0037.html" class="url" ><span 
class="ectt-1000">http://glep.gentoo.org/glep-0037.html</span></a>, April 2005.
</p>
   </div>
                                                                            
                                                                            
<a 
 id="x1-180003r218"></a>
<h2 class="appendixHead"><span class="titlemark">Appendix&#x00A0;F</span><br /><a 
 id="x1-181000F"></a>Desk Reference</h2>
<!--l. 79--><p class="nopar" ><a 
href="eapi-cheatsheet.pdf" >EAPI Cheat Sheet</a>
</p>
 
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