summaryrefslogtreecommitdiff
blob: 7c69f86b4699630c4e87f616dea0cb088067ee70 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
# Copyright 1999-2015 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: multilib-build.eclass
# @MAINTAINER:
# gx86-multilib team <multilib@gentoo.org>
# @AUTHOR:
# Author: Michał Górny <mgorny@gentoo.org>
# @BLURB: flags and utility functions for building multilib packages
# @DESCRIPTION:
# The multilib-build.eclass exports USE flags and utility functions
# necessary to build packages for multilib in a clean and uniform
# manner.
#
# Please note that dependency specifications for multilib-capable
# dependencies shall use the USE dependency string in ${MULTILIB_USEDEP}
# to properly request multilib enabled.

if [[ ! ${_MULTILIB_BUILD} ]]; then

# EAPI=4 is required for meaningful MULTILIB_USEDEP.
case ${EAPI:-0} in
	4|5|6) ;;
	*) die "EAPI=${EAPI} is not supported" ;;
esac

[[ ${EAPI} == [45] ]] && inherit eutils
inherit multibuild multilib

# @ECLASS-VARIABLE: _MULTILIB_FLAGS
# @INTERNAL
# @DESCRIPTION:
# The list of multilib flags and corresponding ABI values. If the same
# flag is reused for multiple ABIs (e.g. x86 on Linux&FreeBSD), multiple
# ABIs may be separated by commas.
#
# Please contact multilib before modifying this list. This way we can
# ensure that every *preliminary* work is done and the multilib can be
# extended safely.
_MULTILIB_FLAGS=(
	abi_x86_32:x86,x86_fbsd,x86_freebsd,x86_linux,x86_macos,x86_solaris
	abi_x86_64:amd64,amd64_fbsd,x64_freebsd,amd64_linux,x64_macos,x64_solaris
	abi_x86_x32:x32
	abi_mips_n32:n32
	abi_mips_n64:n64
	abi_mips_o32:o32
	abi_ppc_32:ppc,ppc_aix,ppc_macos
	abi_ppc_64:ppc64
	abi_s390_32:s390
	abi_s390_64:s390x
)
readonly _MULTILIB_FLAGS

# @ECLASS-VARIABLE: MULTILIB_COMPAT
# @DEFAULT_UNSET
# @DESCRIPTION:
# List of multilib ABIs supported by the ebuild. If unset, defaults to
# all ABIs supported by the eclass.
#
# This variable is intended for use in prebuilt multilib packages that
# can provide binaries only for a limited set of ABIs. If ABIs need to
# be limited due to a bug in source code, package.use.mask is to be used
# instead. Along with MULTILIB_COMPAT, KEYWORDS should contain '-*'.
#
# Note that setting this variable effectively disables support for all
# other ABIs, including other architectures. For example, specifying
# abi_x86_{32,64} disables support for MIPS as well.
#
# The value of MULTILIB_COMPAT determines the value of IUSE. If set, it
# also enables REQUIRED_USE constraints.
#
# Example use:
# @CODE
# # Upstream provides binaries for x86 & amd64 only
# MULTILIB_COMPAT=( abi_x86_{32,64} )
# @CODE

# @ECLASS-VARIABLE: MULTILIB_USEDEP
# @DESCRIPTION:
# The USE-dependency to be used on dependencies (libraries) needing
# to support multilib as well.
#
# Example use:
# @CODE
# RDEPEND="dev-libs/libfoo[${MULTILIB_USEDEP}]
#	net-libs/libbar[ssl,${MULTILIB_USEDEP}]"
# @CODE

# @ECLASS-VARIABLE: MULTILIB_ABI_FLAG
# @DEFAULT_UNSET
# @DESCRIPTION:
# The complete ABI name. Resembles the USE flag name.
#
# This is set within multilib_foreach_abi(),
# multilib_parallel_foreach_abi() and multilib-minimal sub-phase
# functions.
#
# It may be null (empty) when the build is done on ABI not controlled
# by a USE flag (e.g. on non-multilib arch or when using multilib
# portage). The build will always be done for a single ABI then.
#
# Example value:
# @CODE
# abi_x86_64
# @CODE

_multilib_build_set_globals() {
	local flags=( "${_MULTILIB_FLAGS[@]%:*}" )

	if [[ ${MULTILIB_COMPAT[@]} ]]; then
		# Validate MULTILIB_COMPAT and filter out the flags.
		local f
		for f in "${MULTILIB_COMPAT[@]}"; do
			if ! has "${f}" "${flags[@]}"; then
				die "Invalid value in MULTILIB_COMPAT: ${f}"
			fi
		done

		flags=( "${MULTILIB_COMPAT[@]}" )

		REQUIRED_USE="|| ( ${flags[*]} )"
	fi

	local usedeps=${flags[@]/%/(-)?}

	IUSE=${flags[*]}
	MULTILIB_USEDEP=${usedeps// /,}
	readonly MULTILIB_USEDEP
}
_multilib_build_set_globals
unset -f _multilib_build_set_globals

# @FUNCTION: multilib_get_enabled_abis
# @DESCRIPTION:
# Return the ordered list of enabled ABIs if multilib builds
# are enabled. The best (most preferred) ABI will come last.
#
# If multilib is disabled, the default ABI will be returned
# in order to enforce consistent testing with multilib code.
multilib_get_enabled_abis() {
	debug-print-function ${FUNCNAME} "${@}"

	local pairs=( $(multilib_get_enabled_abi_pairs) )
	echo "${pairs[@]#*.}"
}

# @FUNCTION: multilib_get_enabled_abi_pairs
# @DESCRIPTION:
# Return the ordered list of enabled <use-flag>.<ABI> pairs
# if multilib builds are enabled. The best (most preferred)
# ABI will come last.
#
# If multilib is disabled, the default ABI will be returned
# along with empty <use-flag>.
multilib_get_enabled_abi_pairs() {
	debug-print-function ${FUNCNAME} "${@}"

	local abis=( $(get_all_abis) )

	local abi i found
	for abi in "${abis[@]}"; do
		for i in "${_MULTILIB_FLAGS[@]}"; do
			local m_abis=${i#*:} m_abi
			local m_flag=${i%:*}

			# split on ,; we can't switch IFS for function scope because
			# paludis is broken (bug #486592), and switching it locally
			# for the split is more complex than cheating like this
			for m_abi in ${m_abis//,/ }; do
				if [[ ${m_abi} == ${abi} ]] \
					&& { [[ ! "${MULTILIB_COMPAT[@]}" ]] || has "${m_flag}" "${MULTILIB_COMPAT[@]}"; } \
					&& use "${m_flag}"
				then
					echo "${m_flag}.${abi}"
					found=1
					break 2
				fi
			done
		done
	done

	if [[ ! ${found} ]]; then
		# ${ABI} can be used to override the fallback (multilib-portage),
		# ${DEFAULT_ABI} is the safe fallback.
		local abi=${ABI:-${DEFAULT_ABI}}

		debug-print "${FUNCNAME}: no ABIs enabled, fallback to ${abi}"
		debug-print "${FUNCNAME}: ABI=${ABI}, DEFAULT_ABI=${DEFAULT_ABI}"
		echo ".${abi}"
	fi
}

# @FUNCTION: _multilib_multibuild_wrapper
# @USAGE: <argv>...
# @INTERNAL
# @DESCRIPTION:
# Initialize the environment for ABI selected for multibuild.
_multilib_multibuild_wrapper() {
	debug-print-function ${FUNCNAME} "${@}"

	local ABI=${MULTIBUILD_VARIANT#*.}
	local -r MULTILIB_ABI_FLAG=${MULTIBUILD_VARIANT%.*}

	multilib_toolchain_setup "${ABI}"
	readonly ABI
	"${@}"
}

# @FUNCTION: multilib_foreach_abi
# @USAGE: <argv>...
# @DESCRIPTION:
# If multilib support is enabled, sets the toolchain up for each
# supported ABI along with the ABI variable and correct BUILD_DIR,
# and runs the given commands with them.
#
# If multilib support is disabled, it just runs the commands. No setup
# is done.
multilib_foreach_abi() {
	debug-print-function ${FUNCNAME} "${@}"

	local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )
	multibuild_foreach_variant _multilib_multibuild_wrapper "${@}"
}

# @FUNCTION: multilib_parallel_foreach_abi
# @USAGE: <argv>...
# @DESCRIPTION:
# If multilib support is enabled, sets the toolchain up for each
# supported ABI along with the ABI variable and correct BUILD_DIR,
# and runs the given commands with them.
#
# If multilib support is disabled, it just runs the commands. No setup
# is done.
#
# This function used to run multiple commands in parallel. Now it's just
# a deprecated alias to multilib_foreach_abi.
multilib_parallel_foreach_abi() {
	debug-print-function ${FUNCNAME} "${@}"

	local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )
	multibuild_foreach_variant _multilib_multibuild_wrapper "${@}"
}

# @FUNCTION: multilib_for_best_abi
# @USAGE: <argv>...
# @DESCRIPTION:
# Runs the given command with setup for the 'best' (usually native) ABI.
multilib_for_best_abi() {
	debug-print-function ${FUNCNAME} "${@}"

	[[ ${EAPI} == [45] ]] || die "${FUNCNAME} is banned in EAPI ${EAPI}, use multilib_is_native_abi() instead"

	eqawarn "QA warning: multilib_for_best_abi() function is deprecated and should"
	eqawarn "not be used. The multilib_is_native_abi() check may be used instead."

	local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )

	multibuild_for_best_variant _multilib_multibuild_wrapper "${@}"
}

# @FUNCTION: multilib_check_headers
# @DESCRIPTION:
# Check whether the header files are consistent between ABIs.
#
# This function needs to be called after each ABI's installation phase.
# It obtains the header file checksums and compares them with previous
# runs (if any). Dies if header files differ.
multilib_check_headers() {
	_multilib_header_cksum() {
		set -o pipefail

		if [[ -d ${ED}usr/include ]]; then
			find "${ED}"usr/include -type f \
				-exec cksum {} + | sort -k2
		fi
	}

	local cksum cksum_prev
	local cksum_file=${T}/.multilib_header_cksum
	cksum=$(_multilib_header_cksum) || die
	unset -f _multilib_header_cksum

	if [[ -f ${cksum_file} ]]; then
		cksum_prev=$(< "${cksum_file}") || die

		if [[ ${cksum} != ${cksum_prev} ]]; then
			echo "${cksum}" > "${cksum_file}.new" || die

			eerror "Header files have changed between ABIs."

			if type -p diff &>/dev/null; then
				eerror "$(diff -du "${cksum_file}" "${cksum_file}.new")"
			else
				eerror "Old checksums in: ${cksum_file}"
				eerror "New checksums in: ${cksum_file}.new"
			fi

			die "Header checksum mismatch, aborting."
		fi
	else
		echo "${cksum}" > "${cksum_file}" || die
	fi
}

# @FUNCTION: multilib_copy_sources
# @DESCRIPTION:
# Create a single copy of the package sources for each enabled ABI.
#
# The sources are always copied from initial BUILD_DIR (or S if unset)
# to ABI-specific build directory matching BUILD_DIR used by
# multilib_foreach_abi().
multilib_copy_sources() {
	debug-print-function ${FUNCNAME} "${@}"

	local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )
	multibuild_copy_sources
}

# @ECLASS-VARIABLE: MULTILIB_WRAPPED_HEADERS
# @DESCRIPTION:
# A list of headers to wrap for multilib support. The listed headers
# will be moved to a non-standard location and replaced with a file
# including them conditionally to current ABI.
#
# This variable has to be a bash array. Paths shall be relative to
# installation root (${ED}), and name regular files. Recursive wrapping
# is not supported.
#
# Please note that header wrapping is *discouraged*. It is preferred to
# install all headers in a subdirectory of libdir and use pkg-config to
# locate the headers. Some C preprocessors will not work with wrapped
# headers.
#
# Example:
# @CODE
# MULTILIB_WRAPPED_HEADERS=(
#	/usr/include/foobar/config.h
# )
# @CODE

# @ECLASS-VARIABLE: MULTILIB_CHOST_TOOLS
# @DESCRIPTION:
# A list of tool executables to preserve for each multilib ABI.
# The listed executables will be renamed to ${CHOST}-${basename},
# and the native variant will be symlinked to the generic name.
#
# This variable has to be a bash array. Paths shall be relative to
# installation root (${ED}), and name regular files or symbolic
# links to regular files. Recursive wrapping is not supported.
#
# If symbolic link is passed, both symlink path and symlink target
# will be changed. As a result, the symlink target is expected
# to be wrapped as well (either by listing in MULTILIB_CHOST_TOOLS
# or externally).
#
# Please note that tool wrapping is *discouraged*. It is preferred to
# install pkg-config files for each ABI, and require reverse
# dependencies to use that.
#
# Packages that search for tools properly (e.g. using AC_PATH_TOOL
# macro) will find the wrapper executables automatically. Other packages
# will need explicit override of tool paths.
#
# Example:
# @CODE
# MULTILIB_CHOST_TOOLS=(
#	/usr/bin/foo-config
# )

# @CODE
# @FUNCTION: multilib_prepare_wrappers
# @USAGE: [<install-root>]
# @DESCRIPTION:
# Perform the preparation of all kinds of wrappers for the current ABI.
# This function shall be called once per each ABI, after installing
# the files to be wrapped.
#
# Takes an optional custom <install-root> from which files will be
# used. If no root is specified, uses ${ED}.
#
# The files to be wrapped are specified using separate variables,
# e.g. MULTILIB_WRAPPED_HEADERS. Those variables shall not be changed
# between the successive calls to multilib_prepare_wrappers
# and multilib_install_wrappers.
#
# After all wrappers are prepared, multilib_install_wrappers shall
# be called to commit them to the installation tree.
multilib_prepare_wrappers() {
	debug-print-function ${FUNCNAME} "${@}"

	[[ ${#} -le 1 ]] || die "${FUNCNAME}: too many arguments"

	local root=${1:-${ED}}
	local f

	if [[ ${COMPLETE_MULTILIB} == yes ]]; then
		# symlink '${CHOST}-foo -> foo' to support abi-wrapper while
		# keeping ${CHOST}-foo calls correct.

		for f in "${MULTILIB_CHOST_TOOLS[@]}"; do
			# drop leading slash if it's there
			f=${f#/}

			local dir=${f%/*}
			local fn=${f##*/}

			ln -s "${fn}" "${root}/${dir}/${CHOST}-${fn}" || die
		done

		return
	fi

	for f in "${MULTILIB_CHOST_TOOLS[@]}"; do
		# drop leading slash if it's there
		f=${f#/}

		local dir=${f%/*}
		local fn=${f##*/}

		if [[ -L ${root}/${f} ]]; then
			# rewrite the symlink target
			local target
			target=$(readlink "${root}/${f}") || die
			local target_dir target_fn=${target##*/}

			[[ ${target} == */* ]] && target_dir=${target%/*}

			ln -f -s "${target_dir+${target_dir}/}${CHOST}-${target_fn}" \
				"${root}/${f}" || die
		fi

		mv "${root}/${f}" "${root}/${dir}/${CHOST}-${fn}" || die

		# symlink the native one back
		if multilib_is_native_abi; then
			ln -s "${CHOST}-${fn}" "${root}/${f}" || die
		fi
	done

	if [[ ${MULTILIB_WRAPPED_HEADERS[@]} ]]; then
		# If abi_flag is unset, then header wrapping is unsupported on
		# this ABI. This means the arch doesn't support multilib at all
		# -- in this case, the headers are not wrapped and everything
		# works as expected.

		if [[ ${MULTILIB_ABI_FLAG} ]]; then
			for f in "${MULTILIB_WRAPPED_HEADERS[@]}"; do
				# drop leading slash if it's there
				f=${f#/}

				if [[ ${f} != usr/include/* ]]; then
					die "Wrapping headers outside of /usr/include is not supported at the moment."
				fi
				# and then usr/include
				f=${f#usr/include}

				local dir=${f%/*}

				# Some ABIs may have install less files than others.
				if [[ -f ${root}/usr/include${f} ]]; then
					local wrapper=${ED}/tmp/multilib-include${f}

					if [[ ! -f ${ED}/tmp/multilib-include${f} ]]; then
						dodir "/tmp/multilib-include${dir}"
						# a generic template
						cat > "${wrapper}" <<_EOF_ || die
/* This file is auto-generated by multilib-build.eclass
 * as a multilib-friendly wrapper. For the original content,
 * please see the files that are #included below.
 */

#if defined(__x86_64__) /* amd64 */
#	if defined(__ILP32__) /* x32 ABI */
#		error "abi_x86_x32 not supported by the package."
#	else /* 64-bit ABI */
#		error "abi_x86_64 not supported by the package."
#	endif
#elif defined(__i386__) /* plain x86 */
#	error "abi_x86_32 not supported by the package."
#elif defined(__mips__)
#   if(_MIPS_SIM == _ABIN32) /* n32 */
#       error "abi_mips_n32 not supported by the package."
#   elif(_MIPS_SIM == _ABI64) /* n64 */
#       error "abi_mips_n64 not supported by the package."
#   elif(_MIPS_SIM == _ABIO32) /* o32 */
#       error "abi_mips_o32 not supported by the package."
#   endif
#elif defined(__sparc__)
#	if defined(__arch64__)
#       error "abi_sparc_64 not supported by the package."
#	else
#       error "abi_sparc_32 not supported by the package."
#	endif
#elif defined(__s390__)
#	if defined(__s390x__)
#       error "abi_s390_64 not supported by the package."
#	else
#       error "abi_s390_32 not supported by the package."
#	endif
#elif defined(__powerpc__)
#	if defined(__powerpc64__)
#       error "abi_ppc_64 not supported by the package."
#	else
#       error "abi_ppc_32 not supported by the package."
#	endif
#elif defined(SWIG) /* https://sourceforge.net/p/swig/bugs/799/ */
#	error "Native ABI not supported by the package."
#else
#	error "No ABI matched, please report a bug to bugs.gentoo.org"
#endif
_EOF_
					fi

					if ! grep -q "${MULTILIB_ABI_FLAG} " "${wrapper}"
					then
						die "Flag ${MULTILIB_ABI_FLAG} not listed in wrapper template. Please report a bug to https://bugs.gentoo.org."
					fi

					# $CHOST shall be set by multilib_toolchain_setup
					dodir "/tmp/multilib-include/${CHOST}${dir}"
					mv "${root}/usr/include${f}" "${ED}/tmp/multilib-include/${CHOST}${dir}/" || die

					# Note: match a space afterwards to avoid collision potential.
					sed -e "/${MULTILIB_ABI_FLAG} /s&error.*&include <${CHOST}${f}>&" \
						-i "${wrapper}" || die

					# Needed for swig.
					if multilib_is_native_abi; then
						sed -e "/Native ABI/s&error.*&include <${CHOST}${f}>&" \
							-i "${wrapper}" || die
					fi
				fi
			done
		fi
	fi
}

# @FUNCTION: multilib_install_wrappers
# @USAGE: [<install-root>]
# @DESCRIPTION:
# Install the previously-prepared wrappers. This function shall
# be called once, after all wrappers were prepared.
#
# Takes an optional custom <install-root> to which the wrappers will be
# installed. If no root is specified, uses ${ED}. There is no need to
# use the same root as when preparing the wrappers.
#
# The files to be wrapped are specified using separate variables,
# e.g. MULTILIB_WRAPPED_HEADERS. Those variables shall not be changed
# between the calls to multilib_prepare_wrappers
# and multilib_install_wrappers.
multilib_install_wrappers() {
	debug-print-function ${FUNCNAME} "${@}"

	[[ ${#} -le 1 ]] || die "${FUNCNAME}: too many arguments"

	[[ ${COMPLETE_MULTILIB} == yes ]] && return

	local root=${1:-${ED}}

	if [[ -d "${ED}"/tmp/multilib-include ]]; then
		multibuild_merge_root \
			"${ED}"/tmp/multilib-include "${root}"/usr/include
		# it can fail if something else uses /tmp
		rmdir "${ED}"/tmp &>/dev/null
	fi
}

# @FUNCTION: multilib_is_native_abi
# @DESCRIPTION:
# Determine whether the currently built ABI is the profile native.
# Return true status (0) if that is true, otherwise false (1).
multilib_is_native_abi() {
	debug-print-function ${FUNCNAME} "${@}"

	[[ ${#} -eq 0 ]] || die "${FUNCNAME}: too many arguments"

	[[ ${COMPLETE_MULTILIB} == yes || ${ABI} == ${DEFAULT_ABI} ]]
}

# @FUNCTION: multilib_build_binaries
# @DESCRIPTION:
# Deprecated synonym for multilib_is_native_abi
multilib_build_binaries() {
	debug-print-function ${FUNCNAME} "${@}"

	[[ ${EAPI} == [45] ]] || die "${FUNCNAME} is banned in EAPI ${EAPI}, use multilib_is_native_abi() instead"

	eqawarn "QA warning: multilib_build_binaries is deprecated. Please use the equivalent"
	eqawarn "multilib_is_native_abi function instead."

	multilib_is_native_abi "${@}"
}

# @FUNCTION: multilib_native_use_with
# @USAGE: <flag> [<opt-name> [<opt-value>]]
# @DESCRIPTION:
# Output --with configure option alike use_with if USE <flag> is enabled
# and executables are being built (multilib_is_native_abi is true).
# Otherwise, outputs --without configure option. Arguments are the same
# as for use_with in the EAPI.
multilib_native_use_with() {
	if multilib_is_native_abi; then
		use_with "${@}"
	else
		echo "--without-${2:-${1}}"
	fi
}

# @FUNCTION: multilib_native_use_enable
# @USAGE: <flag> [<opt-name> [<opt-value>]]
# @DESCRIPTION:
# Output --enable configure option alike use_enable if USE <flag>
# is enabled and executables are being built (multilib_is_native_abi
# is true). Otherwise, outputs --disable configure option. Arguments are
# the same as for use_enable in the EAPI.
multilib_native_use_enable() {
	if multilib_is_native_abi; then
		use_enable "${@}"
	else
		echo "--disable-${2:-${1}}"
	fi
}

# @FUNCTION: multilib_native_enable
# @USAGE: <opt-name> [<opt-value>]
# @DESCRIPTION:
# Output --enable configure option if executables are being built
# (multilib_is_native_abi is true). Otherwise, output --disable configure
# option.
multilib_native_enable() {
	if multilib_is_native_abi; then
		echo "--enable-${1}${2+=${2}}"
	else
		echo "--disable-${1}"
	fi
}

# @FUNCTION: multilib_native_with
# @USAGE: <opt-name> [<opt-value>]
# @DESCRIPTION:
# Output --with configure option if executables are being built
# (multilib_is_native_abi is true). Otherwise, output --without configure
# option.
multilib_native_with() {
	if multilib_is_native_abi; then
		echo "--with-${1}${2+=${2}}"
	else
		echo "--without-${1}"
	fi
}

# @FUNCTION: multilib_native_usex
# @USAGE: <flag> [<true1> [<false1> [<true2> [<false2>]]]]
# @DESCRIPTION:
# Output the concatenation of <true1> (or 'yes' if unspecified)
# and <true2> if USE <flag> is enabled and executables are being built
# (multilib_is_native_abi is true). Otherwise, output the concatenation
# of <false1> (or 'no' if unspecified) and <false2>. Arguments
# are the same as for usex in the EAPI.
#
# Note: in EAPI 4 you need to inherit eutils to use this function.
multilib_native_usex() {
	if multilib_is_native_abi; then
		usex "${@}"
	else
		echo "${3-no}${5}"
	fi
}

_MULTILIB_BUILD=1
fi