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1# Copyright 1999-2002 Gentoo Technologies, Inc. 1# Copyright 1999-2009 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# Author Bart Verwilst <verwilst@gentoo.org> 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.132 2009/01/21 00:42:20 gengor Exp $
4# /space/gentoo/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass
5ECLASS=flag-o-matic
6 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
12
13inherit eutils toolchain-funcs multilib
14
15################ DEPRECATED functions ################
16# The following are still present to avoid breaking existing
17# code more than necessary; however they are deprecated. Please
18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
19# need to know which hardened techs are active in the compiler.
20# See bug #100974
21#
22# has_hardened
23# has_pie
24# has_pic
25# has_ssp_all
26# has_ssp
27
28
29# {C,CXX,F,FC}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed
31setup-allowed-flags() {
32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
33 export ALLOWED_FLAGS="-pipe"
34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
41 fi
42 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -m*-toc -D* -U*"
55
56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
59 return 0
60}
61
62# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults.
64_filter-hardened() {
65 local f
66 for f in "$@" ; do
67 case "${f}" in
68 # Ideally we should only concern ourselves with PIE flags,
69 # not -fPIC or -fpic, but too many places filter -fPIC without
70 # thinking about -fPIE.
71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
72 gcc-specs-pie || continue
73 is-flagq -nopie || append-flags -nopie;;
74 -fstack-protector)
75 gcc-specs-ssp || continue
76 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
77 -fstack-protector-all)
78 gcc-specs-ssp-to-all || continue
79 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
80 -fno-strict-overflow)
81 gcc-specs-nostrict || continue
82 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
83 esac
84 done
85}
86
87# Remove occurrences of strings from variable given in $1
88# Strings removed are matched as globs, so for example
89# '-O*' would remove -O1, -O2 etc.
90_filter-var() {
91 local f x VAR VAL
92 declare -a new
93
94 VAR=$1
95 shift
96 eval VAL=\${${VAR}}
97 for f in ${VAL}; do
98 for x in "$@"; do
99 # Note this should work with globs like -O*
100 [[ ${f} == ${x} ]] && continue 2
101 done
102 eval new\[\${\#new\[@]}]=\${f}
103 done
104 eval export ${VAR}=\${new\[*]}
105}
106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
7filter-flags () { 111filter-flags() {
112 _filter-hardened "$@"
113 _filter-var CFLAGS "$@"
114 _filter-var CPPFLAGS "$@"
115 _filter-var CXXFLAGS "$@"
116 _filter-var FFLAGS "$@"
117 _filter-var FCFLAGS "$@"
118 return 0
119}
8 120
9 for x in $1; do 121# @FUNCTION: filter-lfs-flags
10 CFLAGS="${CFLAGS/$x}" 122# @DESCRIPTION:
123# Remove flags that enable Large File Support.
124filter-lfs-flags() {
125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127}
128
129# @FUNCTION: append-cppflags
130# @USAGE: <flags>
131# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS.
133append-cppflags() {
134 [[ -z $* ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*"
136 return 0
137}
138
139# @FUNCTION: append-cxxflags
140# @USAGE: <flags>
141# @DESCRIPTION:
142# Add extra <flags> to the current CXXFLAGS.
143append-cxxflags() {
144 [[ -z $* ]] && return 0
11 CXXFLAGS="${CXXFLAGS/$x}" 145 export CXXFLAGS="${CXXFLAGS} $*"
146 return 0
147}
148
149# @FUNCTION: append-fflags
150# @USAGE: <flags>
151# @DESCRIPTION:
152# Add extra <flags> to the current {F,FC}FLAGS.
153append-fflags() {
154 [[ -z $* ]] && return 0
155 export FFLAGS="${FFLAGS} $*"
156 export FCFLAGS="${FCFLAGS} $*"
157 return 0
158}
159
160# @FUNCTION: append-lfs-flags
161# @DESCRIPTION:
162# Add flags that enable Large File Support.
163append-lfs-flags() {
164 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
165 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
166}
167
168# @FUNCTION: append-flags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
172append-flags() {
173 [[ -z $* ]] && return 0
174 export CFLAGS="${CFLAGS} $*"
175 export CXXFLAGS="${CXXFLAGS} $*"
176 export FFLAGS="${FFLAGS} $*"
177 export FCFLAGS="${FCFLAGS} $*"
178 return 0
179}
180
181# @FUNCTION: replace-flags
182# @USAGE: <old> <new>
183# @DESCRIPTION:
184# Replace the <old> flag with <new>. Accepts shell globs for <old>.
185replace-flags() {
186 [[ $# != 2 ]] \
187 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
188 && die "replace-flags takes 2 arguments, not $#"
189
190 local f fset
191 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
192
193 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
194 # Looping over the flags instead of using a global
195 # substitution ensures that we're working with flag atoms.
196 # Otherwise globs like -O* have the potential to wipe out the
197 # list of flags.
198 for f in ${!fset}; do
199 # Note this should work with globs like -O*
200 [[ ${f} == ${1} ]] && f=${2}
201 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
12 done 202 done
203 eval export ${fset}=\${new_${fset}\[*]}
204 done
13 205
206 return 0
14} 207}
15 208
16max-optim () { 209# @FUNCTION: replace-cpu-flags
210# @USAGE: <old> <new>
211# @DESCRIPTION:
212# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
213# with flags that select the <new> cpu. Accepts shell globs for <old>.
214replace-cpu-flags() {
215 local newcpu="$#" ; newcpu="${!newcpu}"
216 while [ $# -gt 1 ] ; do
217 # quote to make sure that no globbing is done (particularly on
218 # ${oldcpu}) prior to calling replace-flags
219 replace-flags "-march=${1}" "-march=${newcpu}"
220 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
221 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
222 shift
223 done
224 return 0
225}
17 226
227_is_flagq() {
228 local x
229 for x in ${!1} ; do
230 [[ ${x} == $2 ]] && return 0
231 done
232 return 1
233}
234
235# @FUNCTION: is-flagq
236# @USAGE: <flag>
237# @DESCRIPTION:
238# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
239is-flagq() {
240 [[ -n $2 ]] && die "Usage: is-flag <flag>"
241 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
242}
243
244# @FUNCTION: is-flag
245# @USAGE: <flag>
246# @DESCRIPTION:
247# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
248is-flag() {
249 is-flagq "$@" && echo true
250}
251
252# @FUNCTION: is-ldflagq
253# @USAGE: <flag>
254# @DESCRIPTION:
255# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
256is-ldflagq() {
257 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
258 _is_flagq LDFLAGS $1
259}
260
261# @FUNCTION: is-ldflag
262# @USAGE: <flag>
263# @DESCRIPTION:
264# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
265is-ldflag() {
266 is-ldflagq "$@" && echo true
267}
268
269# @FUNCTION: filter-mfpmath
270# @USAGE: <math types>
271# @DESCRIPTION:
272# Remove specified math types from the fpmath flag. For example, if the user
273# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
274# -mfpmath=386.
275filter-mfpmath() {
276 local orig_mfpmath new_math prune_math
277
278 # save the original -mfpmath flag
279 orig_mfpmath=$(get-flag -mfpmath)
280 # get the value of the current -mfpmath flag
281 new_math=$(get-flag mfpmath)
282 new_math=" ${new_math//,/ } "
283 # figure out which math values are to be removed
284 prune_math=""
285 for prune_math in "$@" ; do
286 new_math=${new_math/ ${prune_math} / }
287 done
288 new_math=$(echo ${new_math})
289 new_math=${new_math// /,}
290
291 if [[ -z ${new_math} ]] ; then
292 # if we're removing all user specified math values are
293 # slated for removal, then we just filter the flag
294 filter-flags ${orig_mfpmath}
295 else
296 # if we only want to filter some of the user specified
297 # math values, then we replace the current flag
298 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
299 fi
300 return 0
301}
302
303# @FUNCTION: strip-flags
304# @DESCRIPTION:
305# Strip C[XX]FLAGS of everything except known good/safe flags.
306strip-flags() {
307 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
308
309 setup-allowed-flags
310
311 local NEW_CFLAGS=""
312 local NEW_CXXFLAGS=""
313 local NEW_FFLAGS=""
314 local NEW_FCFLAGS=""
315
316 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
317 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
318 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
319 fi
320
321 set -f # disable pathname expansion
322
18 for x in $CFLAGS; do 323 for x in ${CFLAGS}; do
19 echo $x 324 for y in ${ALLOWED_FLAGS}; do
325 flag=${x%%=*}
326 if [ "${flag%%${y}}" = "" ] ; then
327 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
328 break
329 fi
20 done 330 done
331 done
21 332
333 for x in ${CXXFLAGS}; do
334 for y in ${ALLOWED_FLAGS}; do
335 flag=${x%%=*}
336 if [ "${flag%%${y}}" = "" ] ; then
337 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
338 break
339 fi
340 done
341 done
342
343 for x in ${FFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
353 for x in ${FCFLAGS}; do
354 for y in ${ALLOWED_FLAGS}; do
355 flag=${x%%=*}
356 if [ "${flag%%${y}}" = "" ] ; then
357 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
358 break
359 fi
360 done
361 done
362
363 # In case we filtered out all optimization flags fallback to -O2
364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
365 NEW_CFLAGS="${NEW_CFLAGS} -O2"
366 fi
367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
369 fi
370 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
371 NEW_FFLAGS="${NEW_FFLAGS} -O2"
372 fi
373 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
375 fi
376
377 set +f # re-enable pathname expansion
378
379 export CFLAGS="${NEW_CFLAGS}"
380 export CXXFLAGS="${NEW_CXXFLAGS}"
381 export FFLAGS="${NEW_FFLAGS}"
382 export FCFLAGS="${NEW_FCFLAGS}"
383 return 0
22} 384}
385
386test-flag-PROG() {
387 local comp=$1
388 local flags="$2"
389
390 [[ -z ${comp} || -z ${flags} ]] && \
391 return 1
392
393 local PROG=$(tc-get${comp})
394 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
395 > /dev/null 2>&1
396}
397
398# @FUNCTION: test-flag-CC
399# @USAGE: <flag>
400# @DESCRIPTION:
401# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
402test-flag-CC() { test-flag-PROG "CC" "$1"; }
403
404# @FUNCTION: test-flag-CXX
405# @USAGE: <flag>
406# @DESCRIPTION:
407# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
408test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
409
410# @FUNCTION: test-flag-F77
411# @USAGE: <flag>
412# @DESCRIPTION:
413# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
414test-flag-F77() { test-flag-PROG "F77" "$1"; }
415
416# @FUNCTION: test-flag-FC
417# @USAGE: <flag>
418# @DESCRIPTION:
419# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
420test-flag-FC() { test-flag-PROG "FC" "$1"; }
421
422test-flags-PROG() {
423 local comp=$1
424 local flags
425 local x
426
427 shift
428
429 [[ -z ${comp} ]] && return 1
430
431 x=""
432 for x in "$@" ; do
433 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
434 done
435
436 echo "${flags}"
437
438 # Just bail if we dont have any flags
439 [[ -n ${flags} ]]
440}
441
442# @FUNCTION: test-flags-CC
443# @USAGE: <flags>
444# @DESCRIPTION:
445# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
446test-flags-CC() { test-flags-PROG "CC" "$@"; }
447
448# @FUNCTION: test-flags-CXX
449# @USAGE: <flags>
450# @DESCRIPTION:
451# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
452test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
453
454# @FUNCTION: test-flags-F77
455# @USAGE: <flags>
456# @DESCRIPTION:
457# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
458test-flags-F77() { test-flags-PROG "F77" "$@"; }
459
460# @FUNCTION: test-flags-FC
461# @USAGE: <flags>
462# @DESCRIPTION:
463# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
464test-flags-FC() { test-flags-PROG "FC" "$@"; }
465
466# @FUNCTION: test-flags
467# @USAGE: <flags>
468# @DESCRIPTION:
469# Short-hand that should hopefully work for both C and C++ compiler, but
470# its really only present due to the append-flags() abomination.
471test-flags() { test-flags-CC "$@"; }
472
473# @FUNCTION: test_flag
474# @DESCRIPTION:
475# DEPRICIATED, use test-flags()
476test_flag() {
477 ewarn "test_flag: deprecated, please use test-flags()!" >&2
478
479 test-flags-CC "$@"
480}
481
482# @FUNCTION: test_version_info
483# @USAGE: <version>
484# @DESCRIPTION:
485# Returns shell true if the current C compiler version matches <version>, else returns shell false.
486# Accepts shell globs.
487test_version_info() {
488 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
489 return 0
490 else
491 return 1
492 fi
493}
494
495# @FUNCTION: strip-unsupported-flags
496# @DESCRIPTION:
497# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
498strip-unsupported-flags() {
499 export CFLAGS=$(test-flags-CC ${CFLAGS})
500 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
501 export FFLAGS=$(test-flags-F77 ${FFLAGS})
502 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
503}
504
505# @FUNCTION: get-flag
506# @USAGE: <flag>
507# @DESCRIPTION:
508# Find and echo the value for a particular flag. Accepts shell globs.
509get-flag() {
510 local f findflag="$1"
511
512 # this code looks a little flaky but seems to work for
513 # everything we want ...
514 # for example, if CFLAGS="-march=i686":
515 # `get-flag -march` == "-march=i686"
516 # `get-flag march` == "i686"
517 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
518 if [ "${f/${findflag}}" != "${f}" ] ; then
519 printf "%s\n" "${f/-${findflag}=}"
520 return 0
521 fi
522 done
523 return 1
524}
525
526# @FUNCTION: has_hardened
527# @DESCRIPTION:
528# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
529has_hardened() {
530 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
531
532 test_version_info Hardened && return 0
533 # The specs file wont exist unless gcc has GCC_SPECS support
534 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
535}
536
537# @FUNCTION: has_pic
538# @DESCRIPTION:
539# DEPRECATED - use gcc-specs-pie from toolchain-funcs
540# indicate whether PIC is set
541has_pic() {
542 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
543
544 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
545 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
546 gcc-specs-pie
547}
548
549# @FUNCTION: has_pie
550# @DESCRIPTION:
551# DEPRECATED - use gcc-specs-pie from toolchain-funcs
552# indicate whether PIE is set
553has_pie() {
554 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
555
556 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
557 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
558 gcc-specs-pie
559}
560
561# @FUNCTION: has_ssp_all
562# @DESCRIPTION:
563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
564# indicate whether code for SSP is being generated for all functions
565has_ssp_all() {
566 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
567
568 # note; this matches only -fstack-protector-all
569 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
571 gcc-specs-ssp-to-all
572}
573
574# @FUNCTION: has_ssp
575# @DESCRIPTION:
576# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
577# indicate whether code for SSP is being generated
578has_ssp() {
579 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
580
581 # note; this matches both -fstack-protector and -fstack-protector-all
582 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
583 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
584 gcc-specs-ssp
585}
586
587# @FUNCTION: has_m64
588# @DESCRIPTION:
589# This doesn't test if the flag is accepted, it tests if the flag actually
590# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
591# return code is 0, else the return code is 1.
592has_m64() {
593 # this doesnt test if the flag is accepted, it tests if the flag
594 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
595 # please dont replace this function with test_flag in some future
596 # clean-up!
597
598 local temp="$(emktemp)"
599 echo "int main() { return(0); }" > "${temp}".c
600 MY_CC=$(tc-getCC)
601 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
602 local ret=$?
603 rm -f "${temp}".c
604 [[ ${ret} != 1 ]] && return 0
605 return 1
606}
607
608# @FUNCTION: has_m32
609# @DESCRIPTION:
610# This doesn't test if the flag is accepted, it tests if the flag actually
611# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
612# code is 0, else return code is 1.
613has_m32() {
614 # this doesnt test if the flag is accepted, it tests if the flag
615 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
616 # please dont replace this function with test_flag in some future
617 # clean-up!
618
619 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
620
621 local temp=$(emktemp)
622 echo "int main() { return(0); }" > "${temp}".c
623 MY_CC=$(tc-getCC)
624 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
625 local ret=$?
626 rm -f "${temp}".c
627 [[ ${ret} != 1 ]] && return 0
628 return 1
629}
630
631# @FUNCTION: replace-sparc64-flags
632# @DESCRIPTION:
633# Sets mcpu to v8 and uses the original value as mtune if none specified.
634replace-sparc64-flags() {
635 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
636
637 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
638 for x in ${SPARC64_CPUS}; do
639 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
640 done
641 else
642 for x in ${SPARC64_CPUS}; do
643 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
644 done
645 fi
646
647 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
648 for x in ${SPARC64_CPUS}; do
649 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
650 done
651 else
652 for x in ${SPARC64_CPUS}; do
653 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
654 done
655 fi
656
657 export CFLAGS CXXFLAGS
658}
659
660# @FUNCTION: append-ldflags
661# @USAGE: <flags>
662# @DESCRIPTION:
663# Add extra <flags> to the current LDFLAGS.
664append-ldflags() {
665 [[ -z $* ]] && return 0
666 local flag
667 for flag in "$@"; do
668 [[ ${flag} == -l* ]] && \
669 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
670 done
671
672 export LDFLAGS="${LDFLAGS} $*"
673 return 0
674}
675
676# @FUNCTION: filter-ldflags
677# @USAGE: <flags>
678# @DESCRIPTION:
679# Remove particular <flags> from LDFLAGS. Accepts shell globs.
680filter-ldflags() {
681 _filter-var LDFLAGS "$@"
682 return 0
683}
684
685# @FUNCTION: raw-ldflags
686# @USAGE: <flags>
687# @DESCRIPTION:
688# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
689# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
690# to gcc where it needs the '-Wl,'.
691raw-ldflags() {
692 local x input="$@"
693 [[ -z ${input} ]] && input=${LDFLAGS}
694 set --
695 for x in ${input} ; do
696 x=${x#-Wl,}
697 set -- "$@" ${x//,/ }
698 done
699 echo "$@"
700}
701
702# @FUNCTION: bindnow-flags
703# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
704# @DESCRIPTION:
705# DEPRECATED - Gets the flags needed for "NOW" binding
706bindnow-flags() {
707 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
708}
709
710
711# Some tests for when we screw with things and want to make
712# sure we didn't break anything
713#TESTS() {
714# CFLAGS="-a -b -c=1"
715# CXXFLAGS="-x -y -z=2"
716# LDFLAGS="-l -m -n=3"
717#
718# die() { exit 1; }
719# (is-flag 1 2 3) && die
720# (is-ldflag 1 2 3) && die
721#
722# is-flagq -l && die
723# is-ldflagq -a && die
724# is-flagq -a || die
725# is-flagq -x || die
726# is-ldflagq -n=* || die
727# is-ldflagq -n && die
728#
729# strip-unsupported-flags
730# [[ ${CFLAGS} == "-c=1" ]] || die
731# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
732#
733# echo "All tests pass"
734#}
735#TESTS
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