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Revision 1.11 Revision 1.179
1# Copyright 1999-2002 Gentoo Technologies, Inc. 1# Copyright 1999-2012 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>
4# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.11 2002/12/22 12:11:56 cretin Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.179 2012/10/30 20:51:44 vapier Exp $
5 4
6ECLASS=flag-o-matic 5# @ECLASS: flag-o-matic.eclass
7INHERITED="$INHERITED $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.
8 12
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
16inherit eutils toolchain-funcs multilib
17
18# Return all the flag variables that our high level funcs operate on.
19all-flag-vars() {
20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
21}
22
23# {C,CPP,CXX,CCAS,F,FC,LD}FLAGS that we allow in strip-flags
24# Note: shell globs and character lists are allowed
25setup-allowed-flags() {
26 ALLOWED_FLAGS="-pipe"
27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
33 ALLOWED_FLAGS+=" -W* -w"
34
35 # allow a bunch of flags that negate features / control ABI
36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi=* \
49 -D* -U*"
50
51 # 4.5
52 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
53 # 4.6
54 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
55 # 4.7
56 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
57
58 # CPPFLAGS and LDFLAGS
59 ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
60
61 export ALLOWED_FLAGS
62 return 0
63}
64
65# inverted filters for hardened compiler. This is trying to unpick
66# the hardened compiler defaults.
67_filter-hardened() {
68 local f
69 for f in "$@" ; do
70 case "${f}" in
71 # Ideally we should only concern ourselves with PIE flags,
72 # not -fPIC or -fpic, but too many places filter -fPIC without
73 # thinking about -fPIE.
74 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
75 gcc-specs-pie || continue
76 is-flagq -nopie || append-flags -nopie;;
77 -fstack-protector)
78 gcc-specs-ssp || continue
79 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
80 -fstack-protector-all)
81 gcc-specs-ssp-to-all || continue
82 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
83 -fno-strict-overflow)
84 gcc-specs-nostrict || continue
85 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
86 esac
87 done
88}
89
90# Remove occurrences of strings from variable given in $1
91# Strings removed are matched as globs, so for example
92# '-O*' would remove -O1, -O2 etc.
93_filter-var() {
94 local f x var=$1 new=()
95 shift
96
97 for f in ${!var} ; do
98 for x in "$@" ; do
99 # Note this should work with globs like -O*
100 [[ ${f} == ${x} ]] && continue 2
101 done
102 new+=( "${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,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
111filter-flags() {
112 _filter-hardened "$@"
113 local v
114 for v in $(all-flag-vars) ; do
115 _filter-var ${v} "$@"
116 done
117 return 0
118}
119
120# @FUNCTION: filter-lfs-flags
121# @DESCRIPTION:
122# Remove flags that enable Large File Support.
123filter-lfs-flags() {
124 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
125 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
126 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
127 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
128 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
129 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
130}
131
132# @FUNCTION: filter-ldflags
133# @USAGE: <flags>
134# @DESCRIPTION:
135# Remove particular <flags> from LDFLAGS. Accepts shell globs.
136filter-ldflags() {
137 _filter-var LDFLAGS "$@"
138 return 0
139}
140
141# @FUNCTION: append-cppflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CPPFLAGS.
145append-cppflags() {
146 [[ $# -eq 0 ]] && return 0
147 export CPPFLAGS="${CPPFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CFLAGS.
155append-cflags() {
156 [[ $# -eq 0 ]] && return 0
157 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
158 return 0
159}
160
161# @FUNCTION: append-cxxflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current CXXFLAGS.
165append-cxxflags() {
166 [[ $# -eq 0 ]] && return 0
167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
168 return 0
169}
170
171# @FUNCTION: append-fflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current {F,FC}FLAGS.
175append-fflags() {
176 [[ $# -eq 0 ]] && return 0
177 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
179 return 0
180}
181
182# @FUNCTION: append-lfs-flags
183# @DESCRIPTION:
184# Add flags that enable Large File Support.
185append-lfs-flags() {
186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # see comments in filter-lfs-flags func for meaning of these
188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189}
190
191# @FUNCTION: append-ldflags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to the current LDFLAGS.
195append-ldflags() {
196 [[ $# -eq 0 ]] && return 0
197 local flag
198 for flag in "$@"; do
199 [[ ${flag} == -l* ]] && \
200 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
201 done
202
203 export LDFLAGS="${LDFLAGS} $*"
204 return 0
205}
206
207# @FUNCTION: append-flags
208# @USAGE: <flags>
209# @DESCRIPTION:
210# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
211append-flags() {
212 [[ $# -eq 0 ]] && return 0
213 case " $* " in
214 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
215 *' '-L*|\
216 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
217 esac
218 append-cflags "$@"
219 append-cxxflags "$@"
220 append-fflags "$@"
221 return 0
222}
223
224# @FUNCTION: replace-flags
225# @USAGE: <old> <new>
226# @DESCRIPTION:
227# Replace the <old> flag with <new>. Accepts shell globs for <old>.
228replace-flags() {
229 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
230
231 local f var new
232 for var in $(all-flag-vars) ; do
233 # Looping over the flags instead of using a global
234 # substitution ensures that we're working with flag atoms.
235 # Otherwise globs like -O* have the potential to wipe out the
236 # list of flags.
237 new=()
238 for f in ${!var} ; do
239 # Note this should work with globs like -O*
240 [[ ${f} == ${1} ]] && f=${2}
241 new+=( "${f}" )
242 done
243 eval export ${var}=\""${new[*]}"\"
244 done
245
246 return 0
247}
248
249# @FUNCTION: replace-cpu-flags
250# @USAGE: <old> <new>
251# @DESCRIPTION:
252# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
253# with flags that select the <new> cpu. Accepts shell globs for <old>.
254replace-cpu-flags() {
255 local newcpu="$#" ; newcpu="${!newcpu}"
256 while [ $# -gt 1 ] ; do
257 # quote to make sure that no globbing is done (particularly on
258 # ${oldcpu}) prior to calling replace-flags
259 replace-flags "-march=${1}" "-march=${newcpu}"
260 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
261 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
262 shift
263 done
264 return 0
265}
266
267_is_flagq() {
268 local x var
269 eval var=\""\${$1[*]}"\"
270 for x in ${var} ; do
271 [[ ${x} == $2 ]] && return 0
272 done
273 return 1
274}
275
276# @FUNCTION: is-flagq
277# @USAGE: <flag>
278# @DESCRIPTION:
279# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
280is-flagq() {
281 [[ -n $2 ]] && die "Usage: is-flag <flag>"
282
283 local var
284 for var in $(all-flag-vars) ; do
285 _is_flagq ${var} "$1" && return 0
286 done
287 return 1
288}
289
290# @FUNCTION: is-flag
291# @USAGE: <flag>
292# @DESCRIPTION:
293# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
294is-flag() {
295 is-flagq "$@" && echo true
296}
297
298# @FUNCTION: is-ldflagq
299# @USAGE: <flag>
300# @DESCRIPTION:
301# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
302is-ldflagq() {
303 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
304 _is_flagq LDFLAGS $1
305}
306
307# @FUNCTION: is-ldflag
308# @USAGE: <flag>
309# @DESCRIPTION:
310# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
311is-ldflag() {
312 is-ldflagq "$@" && echo true
313}
314
315# @FUNCTION: filter-mfpmath
316# @USAGE: <math types>
317# @DESCRIPTION:
318# Remove specified math types from the fpmath flag. For example, if the user
319# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
320# -mfpmath=386.
321filter-mfpmath() {
322 local orig_mfpmath new_math prune_math
323
324 # save the original -mfpmath flag
325 orig_mfpmath=$(get-flag -mfpmath)
326 # get the value of the current -mfpmath flag
327 new_math=$(get-flag mfpmath)
328 new_math=" ${new_math//,/ } "
329 # figure out which math values are to be removed
330 prune_math=""
331 for prune_math in "$@" ; do
332 new_math=${new_math/ ${prune_math} / }
333 done
334 new_math=$(echo ${new_math})
335 new_math=${new_math// /,}
336
337 if [[ -z ${new_math} ]] ; then
338 # if we're removing all user specified math values are
339 # slated for removal, then we just filter the flag
340 filter-flags ${orig_mfpmath}
341 else
342 # if we only want to filter some of the user specified
343 # math values, then we replace the current flag
344 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
345 fi
346 return 0
347}
348
349# @FUNCTION: strip-flags
350# @DESCRIPTION:
351# Strip *FLAGS of everything except known good/safe flags. This runs over all
352# flags returned by all_flag_vars().
353strip-flags() {
354 local x y var
355
356 setup-allowed-flags
357
358 set -f # disable pathname expansion
359
360 for var in $(all-flag-vars) ; do
361 local new=()
362
363 for x in ${!var} ; do
364 local flag=${x%%=*}
365 for y in ${ALLOWED_FLAGS} ; do
366 if [[ -z ${flag%%${y}} ]] ; then
367 new+=( "${x}" )
368 break
369 fi
370 done
371 done
372
373 # In case we filtered out all optimization flags fallback to -O2
374 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
375 new+=( -O2 )
376 fi
377
378 eval export ${var}=\""${new[*]}"\"
379 done
380
381 set +f # re-enable pathname expansion
382
383 return 0
384}
385
386test-flag-PROG() {
387 local comp=$1
388 local flag=$2
389
390 [[ -z ${comp} || -z ${flag} ]] && return 1
391
392 # use -c so we can test the assembler as well
393 local PROG=$(tc-get${comp})
394 ${PROG} "${flag}" -c -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 ${comp} ]] && return 1
430
431 for x in "$@" ; do
432 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
433 done
434
435 echo "${flags}"
436
437 # Just bail if we dont have any flags
438 [[ -n ${flags} ]]
439}
440
441# @FUNCTION: test-flags-CC
442# @USAGE: <flags>
443# @DESCRIPTION:
444# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
445test-flags-CC() { test-flags-PROG "CC" "$@"; }
446
447# @FUNCTION: test-flags-CXX
448# @USAGE: <flags>
449# @DESCRIPTION:
450# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
451test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
452
453# @FUNCTION: test-flags-F77
454# @USAGE: <flags>
455# @DESCRIPTION:
456# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
457test-flags-F77() { test-flags-PROG "F77" "$@"; }
458
459# @FUNCTION: test-flags-FC
460# @USAGE: <flags>
461# @DESCRIPTION:
462# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
463test-flags-FC() { test-flags-PROG "FC" "$@"; }
464
465# @FUNCTION: test-flags
466# @USAGE: <flags>
467# @DESCRIPTION:
468# Short-hand that should hopefully work for both C and C++ compiler, but
469# its really only present due to the append-flags() abomination.
470test-flags() { test-flags-CC "$@"; }
471
472# @FUNCTION: test_version_info
473# @USAGE: <version>
474# @DESCRIPTION:
475# Returns shell true if the current C compiler version matches <version>, else returns shell false.
476# Accepts shell globs.
477test_version_info() {
478 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
479 return 0
480 else
481 return 1
482 fi
483}
484
485# @FUNCTION: strip-unsupported-flags
486# @DESCRIPTION:
487# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
488strip-unsupported-flags() {
489 export CFLAGS=$(test-flags-CC ${CFLAGS})
490 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
491 export FFLAGS=$(test-flags-F77 ${FFLAGS})
492 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
493}
494
495# @FUNCTION: get-flag
496# @USAGE: <flag>
497# @DESCRIPTION:
498# Find and echo the value for a particular flag. Accepts shell globs.
499get-flag() {
500 local f var findflag="$1"
501
502 # this code looks a little flaky but seems to work for
503 # everything we want ...
504 # for example, if CFLAGS="-march=i686":
505 # `get-flag -march` == "-march=i686"
506 # `get-flag march` == "i686"
507 for var in $(all-flag-vars) ; do
508 for f in ${!var} ; do
509 if [ "${f/${findflag}}" != "${f}" ] ; then
510 printf "%s\n" "${f/-${findflag}=}"
511 return 0
512 fi
513 done
514 done
515 return 1
516}
517
518# @FUNCTION: has_m64
519# @DESCRIPTION:
520# This doesn't test if the flag is accepted, it tests if the flag actually
521# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
522# return code is 0, else the return code is 1.
523has_m64() {
524 eqawarn "${FUNCNAME}: don't use this anymore"
525
526 # this doesnt test if the flag is accepted, it tests if the flag
527 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
528 # please dont replace this function with test_flag in some future
529 # clean-up!
530
531 local temp="$(emktemp)"
532 echo "int main() { return(0); }" > "${temp}".c
533 MY_CC=$(tc-getCC)
534 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
535 local ret=$?
536 rm -f "${temp}".c
537 [[ ${ret} != 1 ]] && return 0
538 return 1
539}
540
541has_m32() {
542 die "${FUNCNAME}: don't use this anymore"
543}
544
545# @FUNCTION: replace-sparc64-flags
546# @DESCRIPTION:
547# Sets mcpu to v8 and uses the original value as mtune if none specified.
548replace-sparc64-flags() {
549 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
550
551 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
552 for x in ${SPARC64_CPUS}; do
553 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
554 done
555 else
556 for x in ${SPARC64_CPUS}; do
557 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
558 done
559 fi
560
561 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
562 for x in ${SPARC64_CPUS}; do
563 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
564 done
565 else
566 for x in ${SPARC64_CPUS}; do
567 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
568 done
569 fi
570
571 export CFLAGS CXXFLAGS
572}
573
574# @FUNCTION: append-libs
575# @USAGE: <libs>
576# @DESCRIPTION:
577# Add extra <libs> to the current LIBS.
578append-libs() {
579 [[ $# -eq 0 ]] && return 0
580 local flag
581 for flag in "$@"; do
582 [[ ${flag} == -l* ]] && flag=${flag#-l}
583 export LIBS="${LIBS} -l${flag}"
584 done
585
586 return 0
587}
588
589# @FUNCTION: raw-ldflags
590# @USAGE: [flags]
591# @DESCRIPTION:
592# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
593# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
594# to gcc where it needs the '-Wl,'.
9# 595#
10#### filter-flags <flag> #### 596# If no flags are specified, then default to ${LDFLAGS}.
11# Remove particular flags from C[XX]FLAGS 597raw-ldflags() {
12# 598 local x input="$@"
13#### append-flags <flag> #### 599 [[ -z ${input} ]] && input=${LDFLAGS}
14# Add extra flags to your current C[XX]FLAGS
15#
16#### replace-flags <orig.flag> <new.flag> ###
17# Replace a flag by another one
18#
19#### is-flag <flag> ####
20# Returns "true" if flag is set in C[XX]FLAGS
21# Matches only complete flag
22#
23#### strip-flags ####
24# Strip C[XX]FLAGS of everything except known
25# good options.
26#
27#### get-flag <flag> ####
28# Find and echo the value for a particular flag
29#
30
31filter-flags () {
32
33 for x in $1
34 do
35 export CFLAGS="${CFLAGS/${x}}"
36 export CXXFLAGS="${CXXFLAGS/${x}}"
37 done
38
39}
40
41append-flags () {
42
43 CFLAGS="${CFLAGS} $1"
44 CXXFLAGS="${CXXFLAGS} $1"
45
46}
47
48replace-flags () {
49
50 CFLAGS="${CFLAGS/${1}/${2} }"
51 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
52
53}
54
55is-flag() {
56
57 for x in ${CFLAGS} ${CXXFLAGS}
58 do
59 if [ "${x}" = "$1" ]
60 then
61 echo true
62 break
63 fi
64 done
65
66}
67
68strip-flags() {
69
70 local NEW_CFLAGS=""
71 local NEW_CXXFLAGS=""
72
73 local ALLOWED_FLAGS="-O -mcpu -march -pipe -g"
74
75 set -f 600 set --
76 601 for x in ${input} ; do
77 for x in ${CFLAGS} 602 x=${x#-Wl,}
78 do 603 set -- "$@" ${x//,/ }
79 for y in ${ALLOWED_FLAGS}
80 do
81 if [ "${x/${y}}" != "${x}" ]
82 then
83 if [ -z "${NEW_CFLAGS}" ]
84 then
85 NEW_CFLAGS="${x}"
86 else
87 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
88 fi
89 fi
90 done 604 done
91 done 605 echo "$@"
92
93 for x in ${CXXFLAGS}
94 do
95 for y in ${ALLOWED_FLAGS}
96 do
97 if [ "${x/${y}}" != "${x}" ]
98 then
99 if [ -z "${NEW_CXXFLAGS}" ]
100 then
101 NEW_CXXFLAGS="${x}"
102 else
103 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
104 fi
105 fi
106 done
107 done
108
109 set +f
110
111 export CFLAGS="${NEW_CFLAGS}"
112 export CXXFLAGS="${NEW_CXXFLAGS}"
113} 606}
114 607
115get-flag() { 608# @FUNCTION: no-as-needed
116 local findflag="$1" 609# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
117 610no-as-needed() {
118 for f in ${CFLAGS} ${CXXFLAGS} ; do 611 case $($(tc-getLD) -v 2>&1 </dev/null) in
119 if [ "${f/${findflag}}" != "${f}" ] ; then 612 *GNU*) # GNU ld
120 echo "${f/-${findflag}=}" 613 echo "-Wl,--no-as-needed" ;;
121 return 614 esac
122 fi
123 done
124} 615}
616
617fi

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