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Revision 1.59 - (show annotations) (download)
Sun Jun 29 08:32:46 2014 UTC (3 years, 6 months ago) by mgorny
Branch: MAIN
Changes since 1.58: +2 -2 lines
Fix handling empty MULTILIB_COMPAT.

1 # Copyright 1999-2014 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/multilib-build.eclass,v 1.58 2014/06/29 07:53:33 mgorny Exp $
4
5 # @ECLASS: multilib-build.eclass
6 # @MAINTAINER:
7 # gx86-multilib team <multilib@gentoo.org>
8 # @AUTHOR:
9 # Author: Michał Górny <mgorny@gentoo.org>
10 # @BLURB: flags and utility functions for building multilib packages
11 # @DESCRIPTION:
12 # The multilib-build.eclass exports USE flags and utility functions
13 # necessary to build packages for multilib in a clean and uniform
14 # manner.
15 #
16 # Please note that dependency specifications for multilib-capable
17 # dependencies shall use the USE dependency string in ${MULTILIB_USEDEP}
18 # to properly request multilib enabled.
19
20 if [[ ! ${_MULTILIB_BUILD} ]]; then
21
22 # EAPI=4 is required for meaningful MULTILIB_USEDEP.
23 case ${EAPI:-0} in
24 4|5) ;;
25 *) die "EAPI=${EAPI} is not supported" ;;
26 esac
27
28 inherit multibuild multilib
29
30 # @ECLASS-VARIABLE: _MULTILIB_FLAGS
31 # @INTERNAL
32 # @DESCRIPTION:
33 # The list of multilib flags and corresponding ABI values. If the same
34 # flag is reused for multiple ABIs (e.g. x86 on Linux&FreeBSD), multiple
35 # ABIs may be separated by commas.
36 #
37 # Please contact multilib before modifying this list. This way we can
38 # ensure that every *preliminary* work is done and the multilib can be
39 # extended safely.
40 _MULTILIB_FLAGS=(
41 abi_x86_32:x86,x86_fbsd
42 abi_x86_64:amd64,amd64_fbsd
43 abi_x86_x32:x32
44 abi_mips_n32:n32
45 abi_mips_n64:n64
46 abi_mips_o32:o32
47 abi_ppc_32:ppc
48 abi_ppc_64:ppc64
49 )
50
51 # @ECLASS-VARIABLE: MULTILIB_COMPAT
52 # @DEFAULT_UNSET
53 # @DESCRIPTION:
54 # List of multilib ABIs supported by the ebuild. If unset, defaults to
55 # all ABIs supported by the eclass.
56 #
57 # This variable is intended for use in prebuilt multilib packages that
58 # can provide binaries only for a limited set of ABIs. If ABIs need to
59 # be limited due to a bug in source code, package.use.mask is
60 # recommended instead.
61 #
62 # Example use:
63 # @CODE
64 # # Upstream provides binaries for x86 & amd64 only
65 # MULTILIB_COMPAT=( abi_x86_{32,64} )
66 # @CODE
67
68 # @ECLASS-VARIABLE: MULTILIB_USEDEP
69 # @DESCRIPTION:
70 # The USE-dependency to be used on dependencies (libraries) needing
71 # to support multilib as well.
72 #
73 # Example use:
74 # @CODE
75 # RDEPEND="dev-libs/libfoo[${MULTILIB_USEDEP}]
76 # net-libs/libbar[ssl,${MULTILIB_USEDEP}]"
77 # @CODE
78
79 # @ECLASS-VARIABLE: MULTILIB_ABI_FLAG
80 # @DEFAULT_UNSET
81 # @DESCRIPTION:
82 # The complete ABI name. Resembles the USE flag name.
83 #
84 # This is set within multilib_foreach_abi(),
85 # multilib_parallel_foreach_abi() and multilib-minimal sub-phase
86 # functions.
87 #
88 # It may be null (empty) when the build is done on ABI not controlled
89 # by a USE flag (e.g. on non-multilib arch or when using multilib
90 # portage). The build will always be done for a single ABI then.
91 #
92 # Example value:
93 # @CODE
94 # abi_x86_64
95 # @CODE
96
97 _multilib_build_set_globals() {
98 local flags=( "${_MULTILIB_FLAGS[@]%:*}" )
99
100 if [[ ${MULTILIB_COMPAT[@]} ]]; then
101 # Validate MULTILIB_COMPAT and filter out the flags.
102 local f
103 for f in "${MULTILIB_COMPAT[@]}"; do
104 if ! has "${f}" "${flags[@]}"; then
105 die "Invalid value in MULTILIB_COMPAT: ${f}"
106 fi
107 done
108
109 flags=( "${MULTILIB_COMPAT[@]}" )
110 fi
111
112 local usedeps=${flags[@]/%/(-)?}
113
114 IUSE=${flags[*]}
115 MULTILIB_USEDEP=${usedeps// /,}
116 }
117 _multilib_build_set_globals
118
119 # @FUNCTION: multilib_get_enabled_abis
120 # @DESCRIPTION:
121 # Return the ordered list of enabled ABIs if multilib builds
122 # are enabled. The best (most preferred) ABI will come last.
123 #
124 # If multilib is disabled, the default ABI will be returned
125 # in order to enforce consistent testing with multilib code.
126 multilib_get_enabled_abis() {
127 debug-print-function ${FUNCNAME} "${@}"
128
129 local pairs=( $(multilib_get_enabled_abi_pairs) )
130 echo "${pairs[@]#*.}"
131 }
132
133 # @FUNCTION: multilib_get_enabled_abi_pairs
134 # @DESCRIPTION:
135 # Return the ordered list of enabled <use-flag>.<ABI> pairs
136 # if multilib builds are enabled. The best (most preferred)
137 # ABI will come last.
138 #
139 # If multilib is disabled, the default ABI will be returned
140 # along with empty <use-flag>.
141 multilib_get_enabled_abi_pairs() {
142 debug-print-function ${FUNCNAME} "${@}"
143
144 local abis=( $(get_all_abis) )
145
146 local abi i found
147 for abi in "${abis[@]}"; do
148 for i in "${_MULTILIB_FLAGS[@]}"; do
149 local m_abis=${i#*:} m_abi
150 local m_flag=${i%:*}
151
152 # split on ,; we can't switch IFS for function scope because
153 # paludis is broken (bug #486592), and switching it locally
154 # for the split is more complex than cheating like this
155 for m_abi in ${m_abis//,/ }; do
156 if [[ ${m_abi} == ${abi} ]] \
157 && { [[ ! "${MULTILIB_COMPAT[@]}" ]] || has "${m_flag}" "${MULTILIB_COMPAT[@]}"; } \
158 && use "${m_flag}"
159 then
160 echo "${m_flag}.${abi}"
161 found=1
162 break 2
163 fi
164 done
165 done
166 done
167
168 if [[ ! ${found} ]]; then
169 # ${ABI} can be used to override the fallback (multilib-portage),
170 # ${DEFAULT_ABI} is the safe fallback.
171 local abi=${ABI:-${DEFAULT_ABI}}
172
173 debug-print "${FUNCNAME}: no ABIs enabled, fallback to ${abi}"
174 debug-print "${FUNCNAME}: ABI=${ABI}, DEFAULT_ABI=${DEFAULT_ABI}"
175 echo ".${abi}"
176 fi
177 }
178
179 # @FUNCTION: _multilib_multibuild_wrapper
180 # @USAGE: <argv>...
181 # @INTERNAL
182 # @DESCRIPTION:
183 # Initialize the environment for ABI selected for multibuild.
184 _multilib_multibuild_wrapper() {
185 debug-print-function ${FUNCNAME} "${@}"
186
187 local ABI=${MULTIBUILD_VARIANT#*.}
188 local MULTILIB_ABI_FLAG=${MULTIBUILD_VARIANT%.*}
189
190 multilib_toolchain_setup "${ABI}"
191 "${@}"
192 }
193
194 # @FUNCTION: multilib_foreach_abi
195 # @USAGE: <argv>...
196 # @DESCRIPTION:
197 # If multilib support is enabled, sets the toolchain up for each
198 # supported ABI along with the ABI variable and correct BUILD_DIR,
199 # and runs the given commands with them.
200 #
201 # If multilib support is disabled, it just runs the commands. No setup
202 # is done.
203 multilib_foreach_abi() {
204 debug-print-function ${FUNCNAME} "${@}"
205
206 local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )
207 multibuild_foreach_variant _multilib_multibuild_wrapper "${@}"
208 }
209
210 # @FUNCTION: multilib_parallel_foreach_abi
211 # @USAGE: <argv>...
212 # @DESCRIPTION:
213 # If multilib support is enabled, sets the toolchain up for each
214 # supported ABI along with the ABI variable and correct BUILD_DIR,
215 # and runs the given commands with them. The commands are run
216 # in parallel with number of jobs being determined from MAKEOPTS.
217 #
218 # If multilib support is disabled, it just runs the commands. No setup
219 # is done.
220 #
221 # Useful for running configure scripts.
222 multilib_parallel_foreach_abi() {
223 debug-print-function ${FUNCNAME} "${@}"
224
225 local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )
226 multibuild_parallel_foreach_variant _multilib_multibuild_wrapper "${@}"
227 }
228
229 # @FUNCTION: multilib_for_best_abi
230 # @USAGE: <argv>...
231 # @DESCRIPTION:
232 # Runs the given command with setup for the 'best' (usually native) ABI.
233 multilib_for_best_abi() {
234 debug-print-function ${FUNCNAME} "${@}"
235
236 eqawarn "QA warning: multilib_for_best_abi() function is deprecated and should"
237 eqawarn "not be used. The multilib_is_native_abi() check may be used instead."
238
239 local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )
240
241 multibuild_for_best_variant _multilib_multibuild_wrapper "${@}"
242 }
243
244 # @FUNCTION: multilib_check_headers
245 # @DESCRIPTION:
246 # Check whether the header files are consistent between ABIs.
247 #
248 # This function needs to be called after each ABI's installation phase.
249 # It obtains the header file checksums and compares them with previous
250 # runs (if any). Dies if header files differ.
251 multilib_check_headers() {
252 _multilib_header_cksum() {
253 [[ -d ${ED}usr/include ]] && \
254 find "${ED}"usr/include -type f \
255 -exec cksum {} + | sort -k2
256 }
257
258 local cksum=$(_multilib_header_cksum)
259 local cksum_file=${T}/.multilib_header_cksum
260
261 if [[ -f ${cksum_file} ]]; then
262 local cksum_prev=$(< "${cksum_file}")
263
264 if [[ ${cksum} != ${cksum_prev} ]]; then
265 echo "${cksum}" > "${cksum_file}.new"
266
267 eerror "Header files have changed between ABIs."
268
269 if type -p diff &>/dev/null; then
270 eerror "$(diff -du "${cksum_file}" "${cksum_file}.new")"
271 else
272 eerror "Old checksums in: ${cksum_file}"
273 eerror "New checksums in: ${cksum_file}.new"
274 fi
275
276 die "Header checksum mismatch, aborting."
277 fi
278 else
279 echo "${cksum}" > "${cksum_file}"
280 fi
281 }
282
283 # @FUNCTION: multilib_copy_sources
284 # @DESCRIPTION:
285 # Create a single copy of the package sources for each enabled ABI.
286 #
287 # The sources are always copied from initial BUILD_DIR (or S if unset)
288 # to ABI-specific build directory matching BUILD_DIR used by
289 # multilib_foreach_abi().
290 multilib_copy_sources() {
291 debug-print-function ${FUNCNAME} "${@}"
292
293 local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )
294 multibuild_copy_sources
295 }
296
297 # @ECLASS-VARIABLE: MULTILIB_WRAPPED_HEADERS
298 # @DESCRIPTION:
299 # A list of headers to wrap for multilib support. The listed headers
300 # will be moved to a non-standard location and replaced with a file
301 # including them conditionally to current ABI.
302 #
303 # This variable has to be a bash array. Paths shall be relative to
304 # installation root (${ED}), and name regular files. Recursive wrapping
305 # is not supported.
306 #
307 # Please note that header wrapping is *discouraged*. It is preferred to
308 # install all headers in a subdirectory of libdir and use pkg-config to
309 # locate the headers. Some C preprocessors will not work with wrapped
310 # headers.
311 #
312 # Example:
313 # @CODE
314 # MULTILIB_WRAPPED_HEADERS=(
315 # /usr/include/foobar/config.h
316 # )
317 # @CODE
318
319 # @ECLASS-VARIABLE: MULTILIB_CHOST_TOOLS
320 # @DESCRIPTION:
321 # A list of tool executables to preserve for each multilib ABI.
322 # The listed executables will be renamed to ${CHOST}-${basename},
323 # and the native variant will be symlinked to the generic name.
324 #
325 # This variable has to be a bash array. Paths shall be relative to
326 # installation root (${ED}), and name regular files or symbolic
327 # links to regular files. Recursive wrapping is not supported.
328 #
329 # If symbolic link is passed, both symlink path and symlink target
330 # will be changed. As a result, the symlink target is expected
331 # to be wrapped as well (either by listing in MULTILIB_CHOST_TOOLS
332 # or externally).
333 #
334 # Please note that tool wrapping is *discouraged*. It is preferred to
335 # install pkg-config files for each ABI, and require reverse
336 # dependencies to use that.
337 #
338 # Packages that search for tools properly (e.g. using AC_PATH_TOOL
339 # macro) will find the wrapper executables automatically. Other packages
340 # will need explicit override of tool paths.
341 #
342 # Example:
343 # @CODE
344 # MULTILIB_CHOST_TOOLS=(
345 # /usr/bin/foo-config
346 # )
347
348 # @CODE
349 # @FUNCTION: multilib_prepare_wrappers
350 # @USAGE: [<install-root>]
351 # @DESCRIPTION:
352 # Perform the preparation of all kinds of wrappers for the current ABI.
353 # This function shall be called once per each ABI, after installing
354 # the files to be wrapped.
355 #
356 # Takes an optional custom <install-root> from which files will be
357 # used. If no root is specified, uses ${ED}.
358 #
359 # The files to be wrapped are specified using separate variables,
360 # e.g. MULTILIB_WRAPPED_HEADERS. Those variables shall not be changed
361 # between the successive calls to multilib_prepare_wrappers
362 # and multilib_install_wrappers.
363 #
364 # After all wrappers are prepared, multilib_install_wrappers shall
365 # be called to commit them to the installation tree.
366 multilib_prepare_wrappers() {
367 debug-print-function ${FUNCNAME} "${@}"
368
369 [[ ${#} -le 1 ]] || die "${FUNCNAME}: too many arguments"
370
371 local root=${1:-${ED}}
372 local f
373
374 if [[ ${COMPLETE_MULTILIB} == yes ]]; then
375 # symlink '${CHOST}-foo -> foo' to support abi-wrapper while
376 # keeping ${CHOST}-foo calls correct.
377
378 for f in "${MULTILIB_CHOST_TOOLS[@]}"; do
379 # drop leading slash if it's there
380 f=${f#/}
381
382 local dir=${f%/*}
383 local fn=${f##*/}
384
385 ln -s "${fn}" "${root}/${dir}/${CHOST}-${fn}" || die
386 done
387
388 return
389 fi
390
391 for f in "${MULTILIB_CHOST_TOOLS[@]}"; do
392 # drop leading slash if it's there
393 f=${f#/}
394
395 local dir=${f%/*}
396 local fn=${f##*/}
397
398 if [[ -L ${root}/${f} ]]; then
399 # rewrite the symlink target
400 local target=$(readlink "${root}/${f}")
401 local target_dir
402 local target_fn=${target##*/}
403
404 [[ ${target} == */* ]] && target_dir=${target%/*}
405
406 ln -f -s "${target_dir+${target_dir}/}${CHOST}-${target_fn}" \
407 "${root}/${f}" || die
408 fi
409
410 mv "${root}/${f}" "${root}/${dir}/${CHOST}-${fn}" || die
411
412 # symlink the native one back
413 if multilib_is_native_abi; then
414 ln -s "${CHOST}-${fn}" "${root}/${f}" || die
415 fi
416 done
417
418 if [[ ${MULTILIB_WRAPPED_HEADERS[@]} ]]; then
419 # If abi_flag is unset, then header wrapping is unsupported on
420 # this ABI. This means the arch doesn't support multilib at all
421 # -- in this case, the headers are not wrapped and everything
422 # works as expected.
423
424 if [[ ${MULTILIB_ABI_FLAG} ]]; then
425 for f in "${MULTILIB_WRAPPED_HEADERS[@]}"; do
426 # drop leading slash if it's there
427 f=${f#/}
428
429 if [[ ${f} != usr/include/* ]]; then
430 die "Wrapping headers outside of /usr/include is not supported at the moment."
431 fi
432 # and then usr/include
433 f=${f#usr/include}
434
435 local dir=${f%/*}
436
437 # Some ABIs may have install less files than others.
438 if [[ -f ${root}/usr/include${f} ]]; then
439 local wrapper=${ED}/tmp/multilib-include${f}
440
441 if [[ ! -f ${ED}/tmp/multilib-include${f} ]]; then
442 dodir "/tmp/multilib-include${dir}"
443 # a generic template
444 cat > "${wrapper}" <<_EOF_
445 /* This file is auto-generated by multilib-build.eclass
446 * as a multilib-friendly wrapper. For the original content,
447 * please see the files that are #included below.
448 */
449
450 #if defined(__x86_64__) /* amd64 */
451 # if defined(__ILP32__) /* x32 ABI */
452 # error "abi_x86_x32 not supported by the package."
453 # else /* 64-bit ABI */
454 # error "abi_x86_64 not supported by the package."
455 # endif
456 #elif defined(__i386__) /* plain x86 */
457 # error "abi_x86_32 not supported by the package."
458 #elif defined(__mips__)
459 # if(_MIPS_SIM == _ABIN32) /* n32 */
460 # error "abi_mips_n32 not supported by the package."
461 # elif(_MIPS_SIM == _ABI64) /* n64 */
462 # error "abi_mips_n64 not supported by the package."
463 # elif(_MIPS_SIM == _ABIO32) /* o32 */
464 # error "abi_mips_o32 not supported by the package."
465 # endif
466 #elif defined(__sparc__)
467 # if defined(__arch64__)
468 # error "abi_sparc_64 not supported by the package."
469 # else
470 # error "abi_sparc_32 not supported by the package."
471 # endif
472 #elif defined(__s390__)
473 # if defined(__s390x__)
474 # error "abi_s390_64 not supported by the package."
475 # else
476 # error "abi_s390_32 not supported by the package."
477 # endif
478 #elif defined(__powerpc__)
479 # if defined(__powerpc64__)
480 # error "abi_ppc_64 not supported by the package."
481 # else
482 # error "abi_ppc_32 not supported by the package."
483 # endif
484 #elif defined(SWIG) /* https://sourceforge.net/p/swig/bugs/799/ */
485 # error "Native ABI not supported by the package."
486 #else
487 # error "No ABI matched, please report a bug to bugs.gentoo.org"
488 #endif
489 _EOF_
490 fi
491
492 if ! grep -q "${MULTILIB_ABI_FLAG} " "${wrapper}"
493 then
494 die "Flag ${MULTILIB_ABI_FLAG} not listed in wrapper template. Please report a bug to https://bugs.gentoo.org."
495 fi
496
497 # $CHOST shall be set by multilib_toolchain_setup
498 dodir "/tmp/multilib-include/${CHOST}${dir}"
499 mv "${root}/usr/include${f}" "${ED}/tmp/multilib-include/${CHOST}${dir}/" || die
500
501 # Note: match a space afterwards to avoid collision potential.
502 sed -e "/${MULTILIB_ABI_FLAG} /s&error.*&include <${CHOST}${f}>&" \
503 -i "${wrapper}" || die
504
505 # Hack for emul-linux-x86 compatibility.
506 # It assumes amd64 will come after x86, and will use amd64
507 # headers if no specific x86 headers were installed.
508 if [[ ${ABI} == amd64 ]]; then
509 sed -e "/abi_x86_32 /s&error.*&include <${CHOST}${f}>&" \
510 -i "${wrapper}" || die
511 fi
512
513 # Needed for swig.
514 if multilib_is_native_abi; then
515 sed -e "/Native ABI/s&error.*&include <${CHOST}${f}>&" \
516 -i "${wrapper}" || die
517 fi
518 fi
519 done
520 fi
521 fi
522 }
523
524 # @FUNCTION: multilib_install_wrappers
525 # @USAGE: [<install-root>]
526 # @DESCRIPTION:
527 # Install the previously-prepared wrappers. This function shall
528 # be called once, after all wrappers were prepared.
529 #
530 # Takes an optional custom <install-root> to which the wrappers will be
531 # installed. If no root is specified, uses ${ED}. There is no need to
532 # use the same root as when preparing the wrappers.
533 #
534 # The files to be wrapped are specified using separate variables,
535 # e.g. MULTILIB_WRAPPED_HEADERS. Those variables shall not be changed
536 # between the calls to multilib_prepare_wrappers
537 # and multilib_install_wrappers.
538 multilib_install_wrappers() {
539 debug-print-function ${FUNCNAME} "${@}"
540
541 [[ ${#} -le 1 ]] || die "${FUNCNAME}: too many arguments"
542
543 [[ ${COMPLETE_MULTILIB} == yes ]] && return
544
545 local root=${1:-${ED}}
546
547 if [[ -d "${ED}"/tmp/multilib-include ]]; then
548 multibuild_merge_root \
549 "${ED}"/tmp/multilib-include "${root}"/usr/include
550 # it can fail if something else uses /tmp
551 rmdir "${ED}"/tmp &>/dev/null
552 fi
553 }
554
555 # @FUNCTION: multilib_is_native_abi
556 # @DESCRIPTION:
557 # Determine whether the currently built ABI is the profile native.
558 # Return true status (0) if that is true, otherwise false (1).
559 #
560 # This function is not intended to be used directly. Please use
561 # multilib_build_binaries instead.
562 multilib_is_native_abi() {
563 debug-print-function ${FUNCNAME} "${@}"
564
565 [[ ${#} -eq 0 ]] || die "${FUNCNAME}: too many arguments"
566
567 [[ ${COMPLETE_MULTILIB} == yes || ${ABI} == ${DEFAULT_ABI} ]]
568 }
569
570 # @FUNCTION: multilib_build_binaries
571 # @DESCRIPTION:
572 # Determine whether to build binaries for the currently built ABI.
573 # Returns true status (0) if the currently built ABI is the profile
574 # native or COMPLETE_MULTILIB variable is set to 'yes', otherwise
575 # false (1).
576 #
577 # This is often useful for configure calls when some of the options are
578 # supposed to be disabled for multilib ABIs (like those used for
579 # executables only).
580 multilib_build_binaries() {
581 debug-print-function ${FUNCNAME} "${@}"
582
583 eqawarn "QA warning: multilib_build_binaries is deprecated. Please use the equivalent"
584 eqawarn "multilib_is_native_abi function instead."
585
586 multilib_is_native_abi "${@}"
587 }
588
589 # @FUNCTION: multilib_native_use_with
590 # @USAGE: <flag> [<opt-name> [<opt-value>]]
591 # @DESCRIPTION:
592 # Output --with configure option alike use_with if USE <flag> is enabled
593 # and executables are being built (multilib_is_native_abi is true).
594 # Otherwise, outputs --without configure option. Arguments are the same
595 # as for use_with in the EAPI.
596 multilib_native_use_with() {
597 if multilib_is_native_abi; then
598 use_with "${@}"
599 else
600 echo "--without-${2:-${1}}"
601 fi
602 }
603
604 # @FUNCTION: multilib_native_use_enable
605 # @USAGE: <flag> [<opt-name> [<opt-value>]]
606 # @DESCRIPTION:
607 # Output --enable configure option alike use_with if USE <flag>
608 # is enabled and executables are being built (multilib_is_native_abi
609 # is true). Otherwise, outputs --disable configure option. Arguments are
610 # the same as for use_enable in the EAPI.
611 multilib_native_use_enable() {
612 if multilib_is_native_abi; then
613 use_enable "${@}"
614 else
615 echo "--disable-${2:-${1}}"
616 fi
617 }
618
619 # @FUNCTION: multilib_native_usex
620 # @USAGE: <flag> [<true1> [<false1> [<true2> [<false2>]]]]
621 # @DESCRIPTION:
622 # Output the concatenation of <true1> (or 'yes' if unspecified)
623 # and <true2> if USE <flag> is enabled and executables are being built
624 # (multilib_is_native_abi is true). Otherwise, output the concatenation
625 # of <false1> (or 'no' if unspecified) and <false2>. Arguments
626 # are the same as for usex in the EAPI.
627 #
628 # Note: in EAPI 4 you need to inherit eutils to use this function.
629 multilib_native_usex() {
630 if multilib_is_native_abi; then
631 usex "${@}"
632 else
633 echo "${3-no}${5}"
634 fi
635 }
636
637 _MULTILIB_BUILD=1
638 fi

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