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\chapter{Feature Availability by EAPI}
\note This chapter is informative and for convenience only. Refer to the main text for specifics.
\begin{landscape}
\begin{longtable}{lllllll}
\caption{Features in EAPIs}\\
\toprule
\multicolumn{1}{c}{\b{Feature}} &
\multicolumn{1}{c}{\b{Reference}} &
\multicolumn{4}{c}{\b{EAPIs}} \\
\multicolumn{1}{c}{} &
\multicolumn{1}{c}{} &
\multicolumn{1}{c}{0} &
\multicolumn{1}{c}{1} &
\multicolumn{1}{c}{2} &
\multicolumn{1}{c}{3} &
\multicolumn{1}{c}{4} \\
\midrule
\endfirsthead
\midrule
\multicolumn{1}{c}{\b{Feature}} &
\multicolumn{1}{c}{\b{Reference}} &
\multicolumn{4}{c}{\b{EAPIs}} \\
\multicolumn{1}{c}{} &
\multicolumn{1}{c}{} &
\multicolumn{1}{c}{0} &
\multicolumn{1}{c}{1} &
\multicolumn{1}{c}{2} &
\multicolumn{1}{c}{3} &
\multicolumn{1}{c}{4} \\
\midrule
\endhead
\midrule
\endfoot
\bottomrule
\endlastfoot
Profile \t{IUSE} injection & \compactfeatureref{profile-iuse-injection} &
No & No & No & No & Yes \\
\t{IUSE} defaults & \compactfeatureref{iuse-defaults} &
No & Yes & Yes & Yes & Yes \\
\t{PROPERTIES} & \compactfeatureref{properties} &
Optionally & Optionally & Optionally & Optionally & Yes \\
\t{RDEPEND=DEPEND} & \compactfeatureref{rdepend-depend} &
Yes & Yes & Yes & Yes & No \\
\t{DEFINED\_PHASES} & \compactfeatureref{defined-phases} &
Optionally & Optionally & Optionally & Optionally & Yes \\
\t{SRC\_URI} arrows & \compactfeatureref{src-uri-arrows} &
No & No & Yes & Yes & Yes \\
Slot dependencies & \compactfeatureref{slot-deps} &
No & Named & Named & Named & Named and Operator \\
Use dependencies & \compactfeatureref{use-deps} &
No & No & 2-style & 2-style & 4-style \\
\t{!} blockers & \compactfeatureref{bang-strength} &
Unspecified & Unspecified & Weak & Weak & Weak \\
\t{!!} blockers & \compactfeatureref{bang-strength} &
Forbidden & Forbidden & Strong & Strong & Strong \\
\t{S} to \t{WORKDIR} fallback & \compactfeatureref{s-workdir-fallback} &
Always & Always & Always & Always & Conditional \\
\t{pkg\_pretend} & \compactfeatureref{pkg-pretend} &
No & No & No & No & Yes \\
\t{src\_prepare} & \compactfeatureref{src-prepare} &
No & No & Yes & Yes & Yes \\
\t{src\_configure} & \compactfeatureref{src-configure} &
No & No & Yes & Yes & Yes \\
\t{src\_compile} style & \compactfeatureref{src-compile} &
0 & 1 & 2 & 2 & 2 \\
\t{src\_install} style & \compactfeatureref{src-install} &
no-op & no-op & no-op & no-op & 4 \\
\t{pkg\_info} & \compactfeatureref{pkg-info} &
Installed & Installed & Installed & Installed & Both \\
\t{default\_} phase functions & \compactfeatureref{default-phase-funcs} &
None & None &
\parbox[t]{1in}{\t{pkg\_nofetch}, \t{src\_unpack}, \t{src\_prepare}, \t{src\_configure}, \t{src\_compile}, \t{src\_test}} &
\parbox[t]{1in}{\t{pkg\_nofetch}, \t{src\_unpack}, \t{src\_prepare}, \t{src\_configure}, \t{src\_compile}, \t{src\_test}} &
\parbox[t]{1in}{\t{pkg\_nofetch}, \t{src\_unpack}, \t{src\_prepare}, \t{src\_configure},
\t{src\_compile}, \t{src\_install}, \t{src\_test}} \\
\t{AA} & \compactfeatureref{aa} &
Yes & Yes & Yes & Yes & No \\
\t{KV} & \compactfeatureref{kv} &
Yes & Yes & Yes & Yes & No \\
\t{REPLACING\_VERSIONS} & \compactfeatureref{replace-version-vars} &
No & No & No & No & Yes \\
\t{REPLACED\_BY\_VERSION} & \compactfeatureref{replace-version-vars} &
No & No & No & No & Yes \\
\t{EPREFIX}, \t{ED}, \t{EROOT} & \compactfeatureref{offset-prefix-vars} &
No & No & No & Yes & Yes \\
Most utilities die & \compactfeatureref{die-on-failure} &
No & No & No & No & Yes \\
\t{nonfatal} & \compactfeatureref{nonfatal} &
No & No & No & No & Yes \\
\t{dohard} & \compactfeatureref{banned-commands} &
Yes & Yes & Yes & Yes & Banned \\
\t{dosed} & \compactfeatureref{banned-commands} &
Yes & Yes & Yes & Yes & Banned \\
\t{econf} arguments & \compactfeatureref{econf-options} &
& & & & \parbox[t]{1in}{disable dependency tracking} \\
\t{dodoc -r} & \compactfeatureref{dodoc} &
No & No & No & No & Yes \\
\t{doins} handles symlinks & \compactfeatureref{doins} &
No & No & No & No & Yes \\
\t{doman} languages & \compactfeatureref{doman-langs} &
No & No & Yes & Yes & Yes \\
Controllable compression & \compactfeatureref{controllable-compress} &
No & No & No & No & Yes \\
\t{docompress} & \compactfeatureref{controllable-compress} &
No & No & No & No & Yes \\
\t{unpack} support for \t{xz}? & \compactfeatureref{unpack-extensions} &
No & No & No & No & Yes \\
\t{default} function & \compactfeatureref{default-func} &
No & No & Yes & Yes & Yes \\
File mtimes preserved & \compactfeatureref{mtime-preserve} &
Undefined & Undefined & Undefined & Yes & Yes \\
\end{longtable}
\end{landscape}
\chapter{Differences Between EAPIs}
\note This chapter is informative and for convenience only. Refer to the main text for specifics.
\section*{EAPI 0}
EAPI 0 is the base EAPI.
\section*{EAPI 1}
EAPI 1 is EAPI 0 with the following changes:
\begin{compactitem}
\item \t{IUSE} defaults, \featureref{iuse-defaults}.
\item Slot dependencies, \featureref{slot-deps}.
\item Different \t{src\_compile} implementation, \featureref{src-compile-1}.
\end{compactitem}
\section*{EAPI 2}
EAPI 2 is EAPI 1 with the following changes:
\begin{compactitem}
\item \t{SRC\_URI} arrows, \featureref{src-uri-arrows}.
\item Use dependencies, \featureref{use-deps}.
\item \t{!} and \t{!!} blockers, \featureref{bang-strength}.
\item \t{src\_prepare}, \featureref{src-prepare}.
\item \t{src\_configure}, \featureref{src-configure}.
\item Different \t{src\_compile} implementation, \featureref{src-compile-2}.
\item \t{default\_} phase functions for phases \t{pkg\_nofetch}, \t{src\_unpack}, \t{src\_prepare},
\t{src\_configure}, \t{src\_compile} and \t{src\_test}; \featureref{default-phase-funcs}.
\item \t{doman} languages support, \featureref{doman-langs}.
\item \t{default} function, \featureref{default-func}.
\end{compactitem}
\section*{EAPI 3}
EAPI 3 is EAPI 2 with the following changes:
\begin{compactitem}
\item Offset-prefix support by definition of \t{EPREFIX}, \t{ED} and \t{EROOT},
\featureref{offset-prefix-vars}
\item File modification times are preserved, \featureref{mtime-preserve}.
\end{compactitem}
\section*{EAPI 4}
EAPI 4 is EAPI 3 with the following changes:
\begin{compactitem}
\item \t{pkg\_pretend}, \featureref{pkg-pretend}.
\item Slot operator dependencies, \featureref{slot-operator-deps}.
\item Use dependency defaults, \featureref{use-dep-defaults}.
\item \t{DEFINED\_PHASES} support is mandatory, \featureref{defined-phases}.
\item \t{PROPERTIES} support is mandatory, \featureref{properties}.
\item Default \t{src\_install} no longer a no-op, \featureref{src-install-4}.
\item Controllable compression and \t{docompress}, \featureref{controllable-compress}.
\item \t{dodoc -r} support, \featureref{dodoc}.
\item \t{doins} supports symlinks, \featureref{doins}.
\item \t{dohard}, \t{dosed} banned, \featureref{banned-commands}.
\item \t{unpack} supports \t{.xz} and \t{.tar.xz}, \featureref{unpack-extensions}.
\item \t{econf} adds \t{-{}-disable-dependency-tracking}, \featureref{econf-options}.
\item \t{pkg\_info} can run on non-installed packages, \featureref{pkg-info}.
\item \t{USE} is calculated differently, \featureref{profile-iuse-injection}.
\item \t{AA} is gone, \featureref{aa}.
\item \t{KV} is gone, \featureref{kv}.
\item \t{REPLACING\_VERSIONS} and \t{REPLACED\_BY\_VERSION}, \featureref{replace-version-vars}.
\item \t{S} to \t{WORKDIR} fallback restricted, \featureref{s-workdir-fallback}.
\item \t{RDEPEND=DEPEND} no longer done, \featureref{rdepend-depend}.
\item Utilities now die on failure, \featureref{die-on-failure}, unless called under \t{nonfatal},
\featureref{nonfatal}
\end{compactitem}
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