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Revision 1.11 Revision 1.171
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 1.171 2012/05/30 07:59:51 jlec 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,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 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
124}
125
126# @FUNCTION: filter-ldflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Remove particular <flags> from LDFLAGS. Accepts shell globs.
130filter-ldflags() {
131 _filter-var LDFLAGS "$@"
132 return 0
133}
134
135# @FUNCTION: append-cppflags
136# @USAGE: <flags>
137# @DESCRIPTION:
138# Add extra <flags> to the current CPPFLAGS.
139append-cppflags() {
140 [[ $# -eq 0 ]] && return 0
141 export CPPFLAGS="${CPPFLAGS} $*"
142 return 0
143}
144
145# @FUNCTION: append-cflags
146# @USAGE: <flags>
147# @DESCRIPTION:
148# Add extra <flags> to the current CFLAGS.
149append-cflags() {
150 [[ $# -eq 0 ]] && return 0
151 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
152 return 0
153}
154
155# @FUNCTION: append-cxxflags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to the current CXXFLAGS.
159append-cxxflags() {
160 [[ $# -eq 0 ]] && return 0
161 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
162 return 0
163}
164
165# @FUNCTION: append-fflags
166# @USAGE: <flags>
167# @DESCRIPTION:
168# Add extra <flags> to the current {F,FC}FLAGS.
169append-fflags() {
170 [[ $# -eq 0 ]] && return 0
171 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
172 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
173 return 0
174}
175
176# @FUNCTION: append-lfs-flags
177# @DESCRIPTION:
178# Add flags that enable Large File Support.
179append-lfs-flags() {
180 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
181 # see comments in filter-lfs-flags func for meaning of these
182 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
183}
184
185# @FUNCTION: append-ldflags
186# @USAGE: <flags>
187# @DESCRIPTION:
188# Add extra <flags> to the current LDFLAGS.
189append-ldflags() {
190 [[ $# -eq 0 ]] && return 0
191 local flag
192 for flag in "$@"; do
193 [[ ${flag} == -l* ]] && \
194 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
195 done
196
197 export LDFLAGS="${LDFLAGS} $*"
198 return 0
199}
200
201# @FUNCTION: append-flags
202# @USAGE: <flags>
203# @DESCRIPTION:
204# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
205append-flags() {
206 [[ $# -eq 0 ]] && return 0
207 case " $* " in
208 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
209 *' '-L*) eqawarn 'please use append-ldflags for linker flags' ;;
210 esac
211 append-cflags "$@"
212 append-cxxflags "$@"
213 append-fflags "$@"
214 return 0
215}
216
217# @FUNCTION: replace-flags
218# @USAGE: <old> <new>
219# @DESCRIPTION:
220# Replace the <old> flag with <new>. Accepts shell globs for <old>.
221replace-flags() {
222 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
223
224 local f var new
225 for var in $(all-flag-vars) ; do
226 # Looping over the flags instead of using a global
227 # substitution ensures that we're working with flag atoms.
228 # Otherwise globs like -O* have the potential to wipe out the
229 # list of flags.
230 new=()
231 for f in ${!var} ; do
232 # Note this should work with globs like -O*
233 [[ ${f} == ${1} ]] && f=${2}
234 new+=( "${f}" )
235 done
236 eval export ${var}=\""${new[*]}"\"
237 done
238
239 return 0
240}
241
242# @FUNCTION: replace-cpu-flags
243# @USAGE: <old> <new>
244# @DESCRIPTION:
245# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
246# with flags that select the <new> cpu. Accepts shell globs for <old>.
247replace-cpu-flags() {
248 local newcpu="$#" ; newcpu="${!newcpu}"
249 while [ $# -gt 1 ] ; do
250 # quote to make sure that no globbing is done (particularly on
251 # ${oldcpu}) prior to calling replace-flags
252 replace-flags "-march=${1}" "-march=${newcpu}"
253 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
254 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
255 shift
256 done
257 return 0
258}
259
260_is_flagq() {
261 local x
262 for x in ${!1} ; do
263 [[ ${x} == $2 ]] && return 0
264 done
265 return 1
266}
267
268# @FUNCTION: is-flagq
269# @USAGE: <flag>
270# @DESCRIPTION:
271# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
272is-flagq() {
273 [[ -n $2 ]] && die "Usage: is-flag <flag>"
274
275 local var
276 for var in $(all-flag-vars) ; do
277 _is_flagq ${var} "$1" && return 0
278 done
279 return 1
280}
281
282# @FUNCTION: is-flag
283# @USAGE: <flag>
284# @DESCRIPTION:
285# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
286is-flag() {
287 is-flagq "$@" && echo true
288}
289
290# @FUNCTION: is-ldflagq
291# @USAGE: <flag>
292# @DESCRIPTION:
293# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
294is-ldflagq() {
295 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
296 _is_flagq LDFLAGS $1
297}
298
299# @FUNCTION: is-ldflag
300# @USAGE: <flag>
301# @DESCRIPTION:
302# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
303is-ldflag() {
304 is-ldflagq "$@" && echo true
305}
306
307# @FUNCTION: filter-mfpmath
308# @USAGE: <math types>
309# @DESCRIPTION:
310# Remove specified math types from the fpmath flag. For example, if the user
311# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
312# -mfpmath=386.
313filter-mfpmath() {
314 local orig_mfpmath new_math prune_math
315
316 # save the original -mfpmath flag
317 orig_mfpmath=$(get-flag -mfpmath)
318 # get the value of the current -mfpmath flag
319 new_math=$(get-flag mfpmath)
320 new_math=" ${new_math//,/ } "
321 # figure out which math values are to be removed
322 prune_math=""
323 for prune_math in "$@" ; do
324 new_math=${new_math/ ${prune_math} / }
325 done
326 new_math=$(echo ${new_math})
327 new_math=${new_math// /,}
328
329 if [[ -z ${new_math} ]] ; then
330 # if we're removing all user specified math values are
331 # slated for removal, then we just filter the flag
332 filter-flags ${orig_mfpmath}
333 else
334 # if we only want to filter some of the user specified
335 # math values, then we replace the current flag
336 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
337 fi
338 return 0
339}
340
341# @FUNCTION: strip-flags
342# @DESCRIPTION:
343# Strip C[XX]FLAGS of everything except known good/safe flags.
344strip-flags() {
345 local x y var
346
347 setup-allowed-flags
348
349 set -f # disable pathname expansion
350
351 for var in $(all-flag-vars) ; do
352 local new=()
353
354 for x in ${!var} ; do
355 local flag=${x%%=*}
356 for y in ${ALLOWED_FLAGS} ; do
357 if [[ -z ${flag%%${y}} ]] ; then
358 new+=( "${x}" )
359 break
360 fi
361 done
362 done
363
364 # In case we filtered out all optimization flags fallback to -O2
365 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
366 new+=( -O2 )
367 fi
368
369 eval export ${var}=\""${new[*]}"\"
370 done
371
372 set +f # re-enable pathname expansion
373
374 return 0
375}
376
377test-flag-PROG() {
378 local comp=$1
379 local flag=$2
380
381 [[ -z ${comp} || -z ${flag} ]] && return 1
382
383 # use -c so we can test the assembler as well
384 local PROG=$(tc-get${comp})
385 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
386 > /dev/null 2>&1
387}
388
389# @FUNCTION: test-flag-CC
390# @USAGE: <flag>
391# @DESCRIPTION:
392# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
393test-flag-CC() { test-flag-PROG "CC" "$1"; }
394
395# @FUNCTION: test-flag-CXX
396# @USAGE: <flag>
397# @DESCRIPTION:
398# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
399test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
400
401# @FUNCTION: test-flag-F77
402# @USAGE: <flag>
403# @DESCRIPTION:
404# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
405test-flag-F77() { test-flag-PROG "F77" "$1"; }
406
407# @FUNCTION: test-flag-FC
408# @USAGE: <flag>
409# @DESCRIPTION:
410# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
411test-flag-FC() { test-flag-PROG "FC" "$1"; }
412
413test-flags-PROG() {
414 local comp=$1
415 local flags
416 local x
417
418 shift
419
420 [[ -z ${comp} ]] && return 1
421
422 for x in "$@" ; do
423 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
424 done
425
426 echo "${flags}"
427
428 # Just bail if we dont have any flags
429 [[ -n ${flags} ]]
430}
431
432# @FUNCTION: test-flags-CC
433# @USAGE: <flags>
434# @DESCRIPTION:
435# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
436test-flags-CC() { test-flags-PROG "CC" "$@"; }
437
438# @FUNCTION: test-flags-CXX
439# @USAGE: <flags>
440# @DESCRIPTION:
441# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
442test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
443
444# @FUNCTION: test-flags-F77
445# @USAGE: <flags>
446# @DESCRIPTION:
447# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
448test-flags-F77() { test-flags-PROG "F77" "$@"; }
449
450# @FUNCTION: test-flags-FC
451# @USAGE: <flags>
452# @DESCRIPTION:
453# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
454test-flags-FC() { test-flags-PROG "FC" "$@"; }
455
456# @FUNCTION: test-flags
457# @USAGE: <flags>
458# @DESCRIPTION:
459# Short-hand that should hopefully work for both C and C++ compiler, but
460# its really only present due to the append-flags() abomination.
461test-flags() { test-flags-CC "$@"; }
462
463# @FUNCTION: test_version_info
464# @USAGE: <version>
465# @DESCRIPTION:
466# Returns shell true if the current C compiler version matches <version>, else returns shell false.
467# Accepts shell globs.
468test_version_info() {
469 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
470 return 0
471 else
472 return 1
473 fi
474}
475
476# @FUNCTION: strip-unsupported-flags
477# @DESCRIPTION:
478# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
479strip-unsupported-flags() {
480 export CFLAGS=$(test-flags-CC ${CFLAGS})
481 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
482 export FFLAGS=$(test-flags-F77 ${FFLAGS})
483 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
484}
485
486# @FUNCTION: get-flag
487# @USAGE: <flag>
488# @DESCRIPTION:
489# Find and echo the value for a particular flag. Accepts shell globs.
490get-flag() {
491 local f var findflag="$1"
492
493 # this code looks a little flaky but seems to work for
494 # everything we want ...
495 # for example, if CFLAGS="-march=i686":
496 # `get-flag -march` == "-march=i686"
497 # `get-flag march` == "i686"
498 for var in $(all-flag-vars) ; do
499 for f in ${!var} ; do
500 if [ "${f/${findflag}}" != "${f}" ] ; then
501 printf "%s\n" "${f/-${findflag}=}"
502 return 0
503 fi
504 done
505 done
506 return 1
507}
508
509# @FUNCTION: has_m64
510# @DESCRIPTION:
511# This doesn't test if the flag is accepted, it tests if the flag actually
512# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
513# return code is 0, else the return code is 1.
514has_m64() {
515 eqawarn "${FUNCNAME}: don't use this anymore"
516
517 # this doesnt test if the flag is accepted, it tests if the flag
518 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
519 # please dont replace this function with test_flag in some future
520 # clean-up!
521
522 local temp="$(emktemp)"
523 echo "int main() { return(0); }" > "${temp}".c
524 MY_CC=$(tc-getCC)
525 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
526 local ret=$?
527 rm -f "${temp}".c
528 [[ ${ret} != 1 ]] && return 0
529 return 1
530}
531
532has_m32() {
533 die "${FUNCNAME}: don't use this anymore"
534}
535
536# @FUNCTION: replace-sparc64-flags
537# @DESCRIPTION:
538# Sets mcpu to v8 and uses the original value as mtune if none specified.
539replace-sparc64-flags() {
540 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
541
542 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
543 for x in ${SPARC64_CPUS}; do
544 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
545 done
546 else
547 for x in ${SPARC64_CPUS}; do
548 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
549 done
550 fi
551
552 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
553 for x in ${SPARC64_CPUS}; do
554 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
555 done
556 else
557 for x in ${SPARC64_CPUS}; do
558 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
559 done
560 fi
561
562 export CFLAGS CXXFLAGS
563}
564
565# @FUNCTION: append-libs
566# @USAGE: <libs>
567# @DESCRIPTION:
568# Add extra <libs> to the current LIBS.
569append-libs() {
570 [[ $# -eq 0 ]] && return 0
571 local flag
572 for flag in "$@"; do
573 [[ ${flag} == -l* ]] && flag=${flag#-l}
574 export LIBS="${LIBS} -l${flag}"
575 done
576
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,'.
9# 586#
10#### filter-flags <flag> #### 587# If no flags are specified, then default to ${LDFLAGS}.
11# Remove particular flags from C[XX]FLAGS 588raw-ldflags() {
12# 589 local x input="$@"
13#### append-flags <flag> #### 590 [[ -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 591 set --
76 592 for x in ${input} ; do
77 for x in ${CFLAGS} 593 x=${x#-Wl,}
78 do 594 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} ${x}"
88 fi
89 fi
90 done 595 done
91 done 596 echo "$@"
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} 597}
114 598
115get-flag() { 599# @FUNCTION: no-as-needed
116 local findflag="$1" 600# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
117 601no-as-needed() {
118 for f in ${CFLAGS} ${CXXFLAGS} ; do 602 case $($(tc-getLD) -v 2>&1 </dev/null) in
119 if [ "${f/${findflag}}" != "${f}" ] ; then 603 *GNU*) # GNU ld
120 echo "${f/-${findflag}=}" 604 echo "-Wl,--no-as-needed" ;;
121 return 605 esac
122 fi
123 done
124} 606}
607
608fi
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