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Revision 1.15 Revision 1.170
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2011 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# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.15 2003/04/06 23:35:41 method Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.170 2012/05/26 02:55:02 vapier Exp $
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
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,CXX,F,FC}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 -D* -U*"
49
50 # 4.5
51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
52 # 4.6
53 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
54
55 export ALLOWED_FLAGS
56 return 0
57}
58
59# inverted filters for hardened compiler. This is trying to unpick
60# the hardened compiler defaults.
61_filter-hardened() {
62 local f
63 for f in "$@" ; do
64 case "${f}" in
65 # Ideally we should only concern ourselves with PIE flags,
66 # not -fPIC or -fpic, but too many places filter -fPIC without
67 # thinking about -fPIE.
68 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
69 gcc-specs-pie || continue
70 is-flagq -nopie || append-flags -nopie;;
71 -fstack-protector)
72 gcc-specs-ssp || continue
73 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
74 -fstack-protector-all)
75 gcc-specs-ssp-to-all || continue
76 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
77 -fno-strict-overflow)
78 gcc-specs-nostrict || continue
79 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
80 esac
81 done
82}
83
84# Remove occurrences of strings from variable given in $1
85# Strings removed are matched as globs, so for example
86# '-O*' would remove -O1, -O2 etc.
87_filter-var() {
88 local f x var=$1 new=()
89 shift
90
91 for f in ${!var} ; do
92 for x in "$@" ; do
93 # Note this should work with globs like -O*
94 [[ ${f} == ${x} ]] && continue 2
95 done
96 new+=( "${f}" )
97 done
98 eval export ${var}=\""${new[*]}"\"
99}
100
101# @FUNCTION: filter-flags
102# @USAGE: <flags>
103# @DESCRIPTION:
104# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
105filter-flags() {
106 _filter-hardened "$@"
107 local v
108 for v in $(all-flag-vars) ; do
109 _filter-var ${v} "$@"
110 done
111 return 0
112}
113
114# @FUNCTION: filter-lfs-flags
115# @DESCRIPTION:
116# Remove flags that enable Large File Support.
117filter-lfs-flags() {
118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
124}
125
126# @FUNCTION: append-cppflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Add extra <flags> to the current CPPFLAGS.
130append-cppflags() {
131 [[ $# -eq 0 ]] && return 0
132 export CPPFLAGS="${CPPFLAGS} $*"
133 return 0
134}
135
136# @FUNCTION: append-cflags
137# @USAGE: <flags>
138# @DESCRIPTION:
139# Add extra <flags> to the current CFLAGS.
140append-cflags() {
141 [[ $# -eq 0 ]] && return 0
142 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
143 return 0
144}
145
146# @FUNCTION: append-cxxflags
147# @USAGE: <flags>
148# @DESCRIPTION:
149# Add extra <flags> to the current CXXFLAGS.
150append-cxxflags() {
151 [[ $# -eq 0 ]] && return 0
152 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
153 return 0
154}
155
156# @FUNCTION: append-fflags
157# @USAGE: <flags>
158# @DESCRIPTION:
159# Add extra <flags> to the current {F,FC}FLAGS.
160append-fflags() {
161 [[ $# -eq 0 ]] && return 0
162 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
163 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
164 return 0
165}
166
167# @FUNCTION: append-lfs-flags
168# @DESCRIPTION:
169# Add flags that enable Large File Support.
170append-lfs-flags() {
171 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
172 # see comments in filter-lfs-flags func for meaning of these
173 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
174}
175
176# @FUNCTION: append-flags
177# @USAGE: <flags>
178# @DESCRIPTION:
179# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
180append-flags() {
181 [[ $# -eq 0 ]] && return 0
182 case " $* " in
183 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
184 *' '-L*) eqawarn 'please use append-ldflags for linker flags' ;;
185 esac
186 append-cflags "$@"
187 append-cxxflags "$@"
188 append-fflags "$@"
189 return 0
190}
191
192# @FUNCTION: replace-flags
193# @USAGE: <old> <new>
194# @DESCRIPTION:
195# Replace the <old> flag with <new>. Accepts shell globs for <old>.
196replace-flags() {
197 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
198
199 local f var new
200 for var in $(all-flag-vars) ; do
201 # Looping over the flags instead of using a global
202 # substitution ensures that we're working with flag atoms.
203 # Otherwise globs like -O* have the potential to wipe out the
204 # list of flags.
205 new=()
206 for f in ${!var} ; do
207 # Note this should work with globs like -O*
208 [[ ${f} == ${1} ]] && f=${2}
209 new+=( "${f}" )
210 done
211 eval export ${var}=\""${new[*]}"\"
212 done
213
214 return 0
215}
216
217# @FUNCTION: replace-cpu-flags
218# @USAGE: <old> <new>
219# @DESCRIPTION:
220# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
221# with flags that select the <new> cpu. Accepts shell globs for <old>.
222replace-cpu-flags() {
223 local newcpu="$#" ; newcpu="${!newcpu}"
224 while [ $# -gt 1 ] ; do
225 # quote to make sure that no globbing is done (particularly on
226 # ${oldcpu}) prior to calling replace-flags
227 replace-flags "-march=${1}" "-march=${newcpu}"
228 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
229 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
230 shift
231 done
232 return 0
233}
234
235_is_flagq() {
236 local x
237 for x in ${!1} ; do
238 [[ ${x} == $2 ]] && return 0
239 done
240 return 1
241}
242
243# @FUNCTION: is-flagq
244# @USAGE: <flag>
245# @DESCRIPTION:
246# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
247is-flagq() {
248 [[ -n $2 ]] && die "Usage: is-flag <flag>"
249
250 local var
251 for var in $(all-flag-vars) ; do
252 _is_flagq ${var} "$1" && return 0
253 done
254 return 1
255}
256
257# @FUNCTION: is-flag
258# @USAGE: <flag>
259# @DESCRIPTION:
260# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
261is-flag() {
262 is-flagq "$@" && echo true
263}
264
265# @FUNCTION: is-ldflagq
266# @USAGE: <flag>
267# @DESCRIPTION:
268# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
269is-ldflagq() {
270 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
271 _is_flagq LDFLAGS $1
272}
273
274# @FUNCTION: is-ldflag
275# @USAGE: <flag>
276# @DESCRIPTION:
277# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
278is-ldflag() {
279 is-ldflagq "$@" && echo true
280}
281
282# @FUNCTION: filter-mfpmath
283# @USAGE: <math types>
284# @DESCRIPTION:
285# Remove specified math types from the fpmath flag. For example, if the user
286# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
287# -mfpmath=386.
288filter-mfpmath() {
289 local orig_mfpmath new_math prune_math
290
291 # save the original -mfpmath flag
292 orig_mfpmath=$(get-flag -mfpmath)
293 # get the value of the current -mfpmath flag
294 new_math=$(get-flag mfpmath)
295 new_math=" ${new_math//,/ } "
296 # figure out which math values are to be removed
297 prune_math=""
298 for prune_math in "$@" ; do
299 new_math=${new_math/ ${prune_math} / }
300 done
301 new_math=$(echo ${new_math})
302 new_math=${new_math// /,}
303
304 if [[ -z ${new_math} ]] ; then
305 # if we're removing all user specified math values are
306 # slated for removal, then we just filter the flag
307 filter-flags ${orig_mfpmath}
308 else
309 # if we only want to filter some of the user specified
310 # math values, then we replace the current flag
311 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
312 fi
313 return 0
314}
315
316# @FUNCTION: strip-flags
317# @DESCRIPTION:
318# Strip C[XX]FLAGS of everything except known good/safe flags.
319strip-flags() {
320 local x y var
321
322 setup-allowed-flags
323
324 set -f # disable pathname expansion
325
326 for var in $(all-flag-vars) ; do
327 local new=()
328
329 for x in ${!var} ; do
330 local flag=${x%%=*}
331 for y in ${ALLOWED_FLAGS} ; do
332 if [[ -z ${flag%%${y}} ]] ; then
333 new+=( "${x}" )
334 break
335 fi
336 done
337 done
338
339 # In case we filtered out all optimization flags fallback to -O2
340 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
341 new+=( -O2 )
342 fi
343
344 eval export ${var}=\""${new[*]}"\"
345 done
346
347 set +f # re-enable pathname expansion
348
349 return 0
350}
351
352test-flag-PROG() {
353 local comp=$1
354 local flag=$2
355
356 [[ -z ${comp} || -z ${flag} ]] && return 1
357
358 # use -c so we can test the assembler as well
359 local PROG=$(tc-get${comp})
360 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
361 > /dev/null 2>&1
362}
363
364# @FUNCTION: test-flag-CC
365# @USAGE: <flag>
366# @DESCRIPTION:
367# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
368test-flag-CC() { test-flag-PROG "CC" "$1"; }
369
370# @FUNCTION: test-flag-CXX
371# @USAGE: <flag>
372# @DESCRIPTION:
373# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
374test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
375
376# @FUNCTION: test-flag-F77
377# @USAGE: <flag>
378# @DESCRIPTION:
379# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
380test-flag-F77() { test-flag-PROG "F77" "$1"; }
381
382# @FUNCTION: test-flag-FC
383# @USAGE: <flag>
384# @DESCRIPTION:
385# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
386test-flag-FC() { test-flag-PROG "FC" "$1"; }
387
388test-flags-PROG() {
389 local comp=$1
390 local flags
391 local x
392
393 shift
394
395 [[ -z ${comp} ]] && return 1
396
397 for x in "$@" ; do
398 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
399 done
400
401 echo "${flags}"
402
403 # Just bail if we dont have any flags
404 [[ -n ${flags} ]]
405}
406
407# @FUNCTION: test-flags-CC
408# @USAGE: <flags>
409# @DESCRIPTION:
410# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
411test-flags-CC() { test-flags-PROG "CC" "$@"; }
412
413# @FUNCTION: test-flags-CXX
414# @USAGE: <flags>
415# @DESCRIPTION:
416# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
417test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
418
419# @FUNCTION: test-flags-F77
420# @USAGE: <flags>
421# @DESCRIPTION:
422# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
423test-flags-F77() { test-flags-PROG "F77" "$@"; }
424
425# @FUNCTION: test-flags-FC
426# @USAGE: <flags>
427# @DESCRIPTION:
428# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
429test-flags-FC() { test-flags-PROG "FC" "$@"; }
430
431# @FUNCTION: test-flags
432# @USAGE: <flags>
433# @DESCRIPTION:
434# Short-hand that should hopefully work for both C and C++ compiler, but
435# its really only present due to the append-flags() abomination.
436test-flags() { test-flags-CC "$@"; }
437
438# @FUNCTION: test_version_info
439# @USAGE: <version>
440# @DESCRIPTION:
441# Returns shell true if the current C compiler version matches <version>, else returns shell false.
442# Accepts shell globs.
443test_version_info() {
444 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
445 return 0
446 else
447 return 1
448 fi
449}
450
451# @FUNCTION: strip-unsupported-flags
452# @DESCRIPTION:
453# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
454strip-unsupported-flags() {
455 export CFLAGS=$(test-flags-CC ${CFLAGS})
456 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
457 export FFLAGS=$(test-flags-F77 ${FFLAGS})
458 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
459}
460
461# @FUNCTION: get-flag
462# @USAGE: <flag>
463# @DESCRIPTION:
464# Find and echo the value for a particular flag. Accepts shell globs.
465get-flag() {
466 local f var findflag="$1"
467
468 # this code looks a little flaky but seems to work for
469 # everything we want ...
470 # for example, if CFLAGS="-march=i686":
471 # `get-flag -march` == "-march=i686"
472 # `get-flag march` == "i686"
473 for var in $(all-flag-vars) ; do
474 for f in ${!var} ; do
475 if [ "${f/${findflag}}" != "${f}" ] ; then
476 printf "%s\n" "${f/-${findflag}=}"
477 return 0
478 fi
479 done
480 done
481 return 1
482}
483
484# @FUNCTION: has_m64
485# @DESCRIPTION:
486# This doesn't test if the flag is accepted, it tests if the flag actually
487# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
488# return code is 0, else the return code is 1.
489has_m64() {
490 eqawarn "${FUNCNAME}: don't use this anymore"
491
492 # this doesnt test if the flag is accepted, it tests if the flag
493 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
494 # please dont replace this function with test_flag in some future
495 # clean-up!
496
497 local temp="$(emktemp)"
498 echo "int main() { return(0); }" > "${temp}".c
499 MY_CC=$(tc-getCC)
500 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
501 local ret=$?
502 rm -f "${temp}".c
503 [[ ${ret} != 1 ]] && return 0
504 return 1
505}
506
507has_m32() {
508 die "${FUNCNAME}: don't use this anymore"
509}
510
511# @FUNCTION: replace-sparc64-flags
512# @DESCRIPTION:
513# Sets mcpu to v8 and uses the original value as mtune if none specified.
514replace-sparc64-flags() {
515 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
516
517 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
518 for x in ${SPARC64_CPUS}; do
519 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
520 done
521 else
522 for x in ${SPARC64_CPUS}; do
523 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
524 done
525 fi
526
527 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
528 for x in ${SPARC64_CPUS}; do
529 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
530 done
531 else
532 for x in ${SPARC64_CPUS}; do
533 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
534 done
535 fi
536
537 export CFLAGS CXXFLAGS
538}
539
540# @FUNCTION: append-libs
541# @USAGE: <libs>
542# @DESCRIPTION:
543# Add extra <libs> to the current LIBS.
544append-libs() {
545 [[ $# -eq 0 ]] && return 0
546 local flag
547 for flag in "$@"; do
548 [[ ${flag} == -l* ]] && flag=${flag#-l}
549 export LIBS="${LIBS} -l${flag}"
550 done
551
552 return 0
553}
554
555# @FUNCTION: append-ldflags
556# @USAGE: <flags>
557# @DESCRIPTION:
558# Add extra <flags> to the current LDFLAGS.
559append-ldflags() {
560 [[ $# -eq 0 ]] && return 0
561 local flag
562 for flag in "$@"; do
563 [[ ${flag} == -l* ]] && \
564 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
565 done
566
567 export LDFLAGS="${LDFLAGS} $*"
568 return 0
569}
570
571# @FUNCTION: filter-ldflags
572# @USAGE: <flags>
573# @DESCRIPTION:
574# Remove particular <flags> from LDFLAGS. Accepts shell globs.
575filter-ldflags() {
576 _filter-var LDFLAGS "$@"
577 return 0
578}
579
580# @FUNCTION: raw-ldflags
581# @USAGE: [flags]
582# @DESCRIPTION:
583# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
584# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
585# to gcc where it needs the '-Wl,'.
4# 586#
5# Author Bart Verwilst <verwilst@gentoo.org> 587# If no flags are specified, then default to ${LDFLAGS}.
6 588raw-ldflags() {
7ECLASS=flag-o-matic 589 local x input="$@"
8INHERITED="$INHERITED $ECLASS" 590 [[ -z ${input} ]] && input=${LDFLAGS}
9
10#
11#### filter-flags <flag> ####
12# Remove particular flags from C[XX]FLAGS
13#
14#### append-flags <flag> ####
15# Add extra flags to your current C[XX]FLAGS
16#
17#### replace-flags <orig.flag> <new.flag> ###
18# Replace a flag by another one
19#
20#### is-flag <flag> ####
21# Returns "true" if flag is set in C[XX]FLAGS
22# Matches only complete flag
23#
24#### strip-flags ####
25# Strip C[XX]FLAGS of everything except known
26# good options.
27#
28#### get-flag <flag> ####
29# Find and echo the value for a particular flag
30#
31
32ALLOWED_FLAGS="-O -mcpu -march -mtune -fstack-protector -pipe -g"
33
34
35filter-flags () {
36
37 for x in $1
38 do
39 export CFLAGS="${CFLAGS/${x}}"
40 export CXXFLAGS="${CXXFLAGS/${x}}"
41 done
42
43}
44
45append-flags () {
46
47 CFLAGS="${CFLAGS} $1"
48 CXXFLAGS="${CXXFLAGS} $1"
49
50}
51
52replace-flags () {
53
54 CFLAGS="${CFLAGS/${1}/${2} }"
55 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
56
57}
58
59is-flag() {
60
61 for x in ${CFLAGS} ${CXXFLAGS}
62 do
63 if [ "${x}" = "$1" ]
64 then
65 echo true
66 break
67 fi
68 done
69
70}
71
72strip-flags() {
73
74 local NEW_CFLAGS=""
75 local NEW_CXXFLAGS=""
76
77 set -f 591 set --
78 592 for x in ${input} ; do
79 for x in ${CFLAGS} 593 x=${x#-Wl,}
80 do 594 set -- "$@" ${x//,/ }
81 for y in ${ALLOWED_FLAGS}
82 do
83 flag=${x%%=*}
84 if [ "${flag%%${y}}" = "" ]
85 then
86 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
87 break
88 fi
89 done 595 done
90 done 596 echo "$@"
91
92 for x in ${CXXFLAGS}
93 do
94 for y in ${ALLOWED_FLAGS}
95 do
96 flag=${x%%=*}
97 if [ "${flag%%${y}}" = "" ]
98 then
99 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
100 break
101 fi
102 done
103 done
104
105 set +f
106
107 export CFLAGS="${NEW_CFLAGS}"
108 export CXXFLAGS="${NEW_CXXFLAGS}"
109} 597}
110 598
111get-flag() { 599# @FUNCTION: no-as-needed
112 local findflag="$1" 600# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
113 601no-as-needed() {
114 for f in ${CFLAGS} ${CXXFLAGS} ; do 602 case $($(tc-getLD) -v 2>&1 </dev/null) in
115 if [ "${f/${findflag}}" != "${f}" ] ; then 603 *GNU*) # GNU ld
116 echo "${f/-${findflag}=}" 604 echo "-Wl,--no-as-needed" ;;
117 return 605 esac
118 fi
119 done
120} 606}
607
608fi

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