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Revision 1.152 - (show annotations) (download)
Tue Jul 12 04:08:52 2011 UTC (3 years ago) by vapier
Branch: MAIN
Changes since 1.151: +3 -3 lines
use -c rather than -S when testing flags so that we can check for assembler flags and not just compiler flags (which lets use check -Wa,--xxx flags #373743)

1 # Copyright 1999-2009 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.150 2011/02/25 10:51:44 dirtyepic 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
13 inherit 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
31 setup-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="${ALLOWED_FLAGS} -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
41 fi
42 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
56 -msecure-plt -m*-toc -D* -U*"
57
58 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
62 -mno-bmi -mno-tbm"
63
64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
67 return 0
68 }
69
70 # inverted filters for hardened compiler. This is trying to unpick
71 # the hardened compiler defaults.
72 _filter-hardened() {
73 local f
74 for f in "$@" ; do
75 case "${f}" in
76 # Ideally we should only concern ourselves with PIE flags,
77 # not -fPIC or -fpic, but too many places filter -fPIC without
78 # thinking about -fPIE.
79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
80 gcc-specs-pie || continue
81 is-flagq -nopie || append-flags -nopie;;
82 -fstack-protector)
83 gcc-specs-ssp || continue
84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
85 -fstack-protector-all)
86 gcc-specs-ssp-to-all || continue
87 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 -fno-strict-overflow)
89 gcc-specs-nostrict || continue
90 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
91 esac
92 done
93 }
94
95 # Remove occurrences of strings from variable given in $1
96 # Strings removed are matched as globs, so for example
97 # '-O*' would remove -O1, -O2 etc.
98 _filter-var() {
99 local f x VAR VAL
100 declare -a new
101
102 VAR=$1
103 shift
104 eval VAL=\${${VAR}}
105 for f in ${VAL}; do
106 for x in "$@"; do
107 # Note this should work with globs like -O*
108 [[ ${f} == ${x} ]] && continue 2
109 done
110 eval new\[\${\#new\[@]}]=\${f}
111 done
112 eval export ${VAR}=\${new\[*]}
113 }
114
115 # @FUNCTION: filter-flags
116 # @USAGE: <flags>
117 # @DESCRIPTION:
118 # Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
119 filter-flags() {
120 _filter-hardened "$@"
121 _filter-var CFLAGS "$@"
122 _filter-var CPPFLAGS "$@"
123 _filter-var CXXFLAGS "$@"
124 _filter-var FFLAGS "$@"
125 _filter-var FCFLAGS "$@"
126 return 0
127 }
128
129 # @FUNCTION: filter-lfs-flags
130 # @DESCRIPTION:
131 # Remove flags that enable Large File Support.
132 filter-lfs-flags() {
133 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135 }
136
137 # @FUNCTION: append-cppflags
138 # @USAGE: <flags>
139 # @DESCRIPTION:
140 # Add extra <flags> to the current CPPFLAGS.
141 append-cppflags() {
142 [[ -z $* ]] && return 0
143 export CPPFLAGS="${CPPFLAGS} $*"
144 return 0
145 }
146
147 # @FUNCTION: append-cflags
148 # @USAGE: <flags>
149 # @DESCRIPTION:
150 # Add extra <flags> to the current CFLAGS.
151 append-cflags() {
152 [[ -z $* ]] && return 0
153 export CFLAGS="${CFLAGS} $*"
154 return 0
155 }
156
157 # @FUNCTION: append-cxxflags
158 # @USAGE: <flags>
159 # @DESCRIPTION:
160 # Add extra <flags> to the current CXXFLAGS.
161 append-cxxflags() {
162 [[ -z $* ]] && return 0
163 export CXXFLAGS="${CXXFLAGS} $*"
164 return 0
165 }
166
167 # @FUNCTION: append-fflags
168 # @USAGE: <flags>
169 # @DESCRIPTION:
170 # Add extra <flags> to the current {F,FC}FLAGS.
171 append-fflags() {
172 [[ -z $* ]] && return 0
173 export FFLAGS="${FFLAGS} $*"
174 export FCFLAGS="${FCFLAGS} $*"
175 return 0
176 }
177
178 # @FUNCTION: append-lfs-flags
179 # @DESCRIPTION:
180 # Add flags that enable Large File Support.
181 append-lfs-flags() {
182 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
183 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
184 }
185
186 # @FUNCTION: append-flags
187 # @USAGE: <flags>
188 # @DESCRIPTION:
189 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
190 append-flags() {
191 [[ -z $* ]] && return 0
192 append-cflags "$@"
193 append-cxxflags "$@"
194 append-fflags "$@"
195 return 0
196 }
197
198 # @FUNCTION: replace-flags
199 # @USAGE: <old> <new>
200 # @DESCRIPTION:
201 # Replace the <old> flag with <new>. Accepts shell globs for <old>.
202 replace-flags() {
203 [[ $# != 2 ]] \
204 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
205 && die "replace-flags takes 2 arguments, not $#"
206
207 local f fset
208 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
209
210 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
211 # Looping over the flags instead of using a global
212 # substitution ensures that we're working with flag atoms.
213 # Otherwise globs like -O* have the potential to wipe out the
214 # list of flags.
215 for f in ${!fset}; do
216 # Note this should work with globs like -O*
217 [[ ${f} == ${1} ]] && f=${2}
218 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
219 done
220 eval export ${fset}=\${new_${fset}\[*]}
221 done
222
223 return 0
224 }
225
226 # @FUNCTION: replace-cpu-flags
227 # @USAGE: <old> <new>
228 # @DESCRIPTION:
229 # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
230 # with flags that select the <new> cpu. Accepts shell globs for <old>.
231 replace-cpu-flags() {
232 local newcpu="$#" ; newcpu="${!newcpu}"
233 while [ $# -gt 1 ] ; do
234 # quote to make sure that no globbing is done (particularly on
235 # ${oldcpu}) prior to calling replace-flags
236 replace-flags "-march=${1}" "-march=${newcpu}"
237 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
238 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
239 shift
240 done
241 return 0
242 }
243
244 _is_flagq() {
245 local x
246 for x in ${!1} ; do
247 [[ ${x} == $2 ]] && return 0
248 done
249 return 1
250 }
251
252 # @FUNCTION: is-flagq
253 # @USAGE: <flag>
254 # @DESCRIPTION:
255 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
256 is-flagq() {
257 [[ -n $2 ]] && die "Usage: is-flag <flag>"
258 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
259 }
260
261 # @FUNCTION: is-flag
262 # @USAGE: <flag>
263 # @DESCRIPTION:
264 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
265 is-flag() {
266 is-flagq "$@" && echo true
267 }
268
269 # @FUNCTION: is-ldflagq
270 # @USAGE: <flag>
271 # @DESCRIPTION:
272 # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
273 is-ldflagq() {
274 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
275 _is_flagq LDFLAGS $1
276 }
277
278 # @FUNCTION: is-ldflag
279 # @USAGE: <flag>
280 # @DESCRIPTION:
281 # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
282 is-ldflag() {
283 is-ldflagq "$@" && echo true
284 }
285
286 # @FUNCTION: filter-mfpmath
287 # @USAGE: <math types>
288 # @DESCRIPTION:
289 # Remove specified math types from the fpmath flag. For example, if the user
290 # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
291 # -mfpmath=386.
292 filter-mfpmath() {
293 local orig_mfpmath new_math prune_math
294
295 # save the original -mfpmath flag
296 orig_mfpmath=$(get-flag -mfpmath)
297 # get the value of the current -mfpmath flag
298 new_math=$(get-flag mfpmath)
299 new_math=" ${new_math//,/ } "
300 # figure out which math values are to be removed
301 prune_math=""
302 for prune_math in "$@" ; do
303 new_math=${new_math/ ${prune_math} / }
304 done
305 new_math=$(echo ${new_math})
306 new_math=${new_math// /,}
307
308 if [[ -z ${new_math} ]] ; then
309 # if we're removing all user specified math values are
310 # slated for removal, then we just filter the flag
311 filter-flags ${orig_mfpmath}
312 else
313 # if we only want to filter some of the user specified
314 # math values, then we replace the current flag
315 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
316 fi
317 return 0
318 }
319
320 # @FUNCTION: strip-flags
321 # @DESCRIPTION:
322 # Strip C[XX]FLAGS of everything except known good/safe flags.
323 strip-flags() {
324 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
325
326 setup-allowed-flags
327
328 local NEW_CFLAGS=""
329 local NEW_CXXFLAGS=""
330 local NEW_FFLAGS=""
331 local NEW_FCFLAGS=""
332
333 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
334 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
335 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
336 fi
337
338 set -f # disable pathname expansion
339
340 for x in ${CFLAGS}; do
341 for y in ${ALLOWED_FLAGS}; do
342 flag=${x%%=*}
343 if [ "${flag%%${y}}" = "" ] ; then
344 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
345 break
346 fi
347 done
348 done
349
350 for x in ${CXXFLAGS}; do
351 for y in ${ALLOWED_FLAGS}; do
352 flag=${x%%=*}
353 if [ "${flag%%${y}}" = "" ] ; then
354 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
355 break
356 fi
357 done
358 done
359
360 for x in ${FFLAGS}; do
361 for y in ${ALLOWED_FLAGS}; do
362 flag=${x%%=*}
363 if [ "${flag%%${y}}" = "" ] ; then
364 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
365 break
366 fi
367 done
368 done
369
370 for x in ${FCFLAGS}; do
371 for y in ${ALLOWED_FLAGS}; do
372 flag=${x%%=*}
373 if [ "${flag%%${y}}" = "" ] ; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
375 break
376 fi
377 done
378 done
379
380 # In case we filtered out all optimization flags fallback to -O2
381 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
382 NEW_CFLAGS="${NEW_CFLAGS} -O2"
383 fi
384 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
385 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
386 fi
387 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
388 NEW_FFLAGS="${NEW_FFLAGS} -O2"
389 fi
390 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
391 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
392 fi
393
394 set +f # re-enable pathname expansion
395
396 export CFLAGS="${NEW_CFLAGS}"
397 export CXXFLAGS="${NEW_CXXFLAGS}"
398 export FFLAGS="${NEW_FFLAGS}"
399 export FCFLAGS="${NEW_FCFLAGS}"
400 return 0
401 }
402
403 test-flag-PROG() {
404 local comp=$1
405 local flags="$2"
406
407 [[ -z ${comp} || -z ${flags} ]] && return 1
408
409 # use -c so we can test the assembler as well
410 local PROG=$(tc-get${comp})
411 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
412 > /dev/null 2>&1
413 }
414
415 # @FUNCTION: test-flag-CC
416 # @USAGE: <flag>
417 # @DESCRIPTION:
418 # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
419 test-flag-CC() { test-flag-PROG "CC" "$1"; }
420
421 # @FUNCTION: test-flag-CXX
422 # @USAGE: <flag>
423 # @DESCRIPTION:
424 # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
425 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
426
427 # @FUNCTION: test-flag-F77
428 # @USAGE: <flag>
429 # @DESCRIPTION:
430 # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
431 test-flag-F77() { test-flag-PROG "F77" "$1"; }
432
433 # @FUNCTION: test-flag-FC
434 # @USAGE: <flag>
435 # @DESCRIPTION:
436 # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
437 test-flag-FC() { test-flag-PROG "FC" "$1"; }
438
439 test-flags-PROG() {
440 local comp=$1
441 local flags
442 local x
443
444 shift
445
446 [[ -z ${comp} ]] && return 1
447
448 x=""
449 for x in "$@" ; do
450 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
451 done
452
453 echo "${flags}"
454
455 # Just bail if we dont have any flags
456 [[ -n ${flags} ]]
457 }
458
459 # @FUNCTION: test-flags-CC
460 # @USAGE: <flags>
461 # @DESCRIPTION:
462 # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
463 test-flags-CC() { test-flags-PROG "CC" "$@"; }
464
465 # @FUNCTION: test-flags-CXX
466 # @USAGE: <flags>
467 # @DESCRIPTION:
468 # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
469 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
470
471 # @FUNCTION: test-flags-F77
472 # @USAGE: <flags>
473 # @DESCRIPTION:
474 # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
475 test-flags-F77() { test-flags-PROG "F77" "$@"; }
476
477 # @FUNCTION: test-flags-FC
478 # @USAGE: <flags>
479 # @DESCRIPTION:
480 # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
481 test-flags-FC() { test-flags-PROG "FC" "$@"; }
482
483 # @FUNCTION: test-flags
484 # @USAGE: <flags>
485 # @DESCRIPTION:
486 # Short-hand that should hopefully work for both C and C++ compiler, but
487 # its really only present due to the append-flags() abomination.
488 test-flags() { test-flags-CC "$@"; }
489
490 # @FUNCTION: test_version_info
491 # @USAGE: <version>
492 # @DESCRIPTION:
493 # Returns shell true if the current C compiler version matches <version>, else returns shell false.
494 # Accepts shell globs.
495 test_version_info() {
496 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
497 return 0
498 else
499 return 1
500 fi
501 }
502
503 # @FUNCTION: strip-unsupported-flags
504 # @DESCRIPTION:
505 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
506 strip-unsupported-flags() {
507 export CFLAGS=$(test-flags-CC ${CFLAGS})
508 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
509 export FFLAGS=$(test-flags-F77 ${FFLAGS})
510 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
511 }
512
513 # @FUNCTION: get-flag
514 # @USAGE: <flag>
515 # @DESCRIPTION:
516 # Find and echo the value for a particular flag. Accepts shell globs.
517 get-flag() {
518 local f findflag="$1"
519
520 # this code looks a little flaky but seems to work for
521 # everything we want ...
522 # for example, if CFLAGS="-march=i686":
523 # `get-flag -march` == "-march=i686"
524 # `get-flag march` == "i686"
525 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
526 if [ "${f/${findflag}}" != "${f}" ] ; then
527 printf "%s\n" "${f/-${findflag}=}"
528 return 0
529 fi
530 done
531 return 1
532 }
533
534 # DEAD FUNCS. Remove by Dec 2011.
535 test_flag() { die "$0: deprecated, please use test-flags()!" ; }
536 has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
537 has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
538 has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
539 has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
540 has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
541
542 # @FUNCTION: has_m64
543 # @DESCRIPTION:
544 # This doesn't test if the flag is accepted, it tests if the flag actually
545 # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
546 # return code is 0, else the return code is 1.
547 has_m64() {
548 # this doesnt test if the flag is accepted, it tests if the flag
549 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
550 # please dont replace this function with test_flag in some future
551 # clean-up!
552
553 local temp="$(emktemp)"
554 echo "int main() { return(0); }" > "${temp}".c
555 MY_CC=$(tc-getCC)
556 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
557 local ret=$?
558 rm -f "${temp}".c
559 [[ ${ret} != 1 ]] && return 0
560 return 1
561 }
562
563 # @FUNCTION: has_m32
564 # @DESCRIPTION:
565 # This doesn't test if the flag is accepted, it tests if the flag actually
566 # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
567 # code is 0, else return code is 1.
568 has_m32() {
569 # this doesnt test if the flag is accepted, it tests if the flag
570 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
571 # please dont replace this function with test_flag in some future
572 # clean-up!
573
574 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
575
576 local temp=$(emktemp)
577 echo "int main() { return(0); }" > "${temp}".c
578 MY_CC=$(tc-getCC)
579 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
580 local ret=$?
581 rm -f "${temp}".c
582 [[ ${ret} != 1 ]] && return 0
583 return 1
584 }
585
586 # @FUNCTION: replace-sparc64-flags
587 # @DESCRIPTION:
588 # Sets mcpu to v8 and uses the original value as mtune if none specified.
589 replace-sparc64-flags() {
590 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
591
592 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
593 for x in ${SPARC64_CPUS}; do
594 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
595 done
596 else
597 for x in ${SPARC64_CPUS}; do
598 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
599 done
600 fi
601
602 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
603 for x in ${SPARC64_CPUS}; do
604 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
605 done
606 else
607 for x in ${SPARC64_CPUS}; do
608 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
609 done
610 fi
611
612 export CFLAGS CXXFLAGS
613 }
614
615 # @FUNCTION: append-libs
616 # @USAGE: <libs>
617 # @DESCRIPTION:
618 # Add extra <libs> to the current LIBS.
619 append-libs() {
620 [[ -z $* ]] && return 0
621 local flag
622 for flag in "$@"; do
623 [[ ${flag} == -l* ]] && flag=${flag#-l}
624 export LIBS="${LIBS} -l${flag}"
625 done
626
627 return 0
628 }
629
630 # @FUNCTION: append-ldflags
631 # @USAGE: <flags>
632 # @DESCRIPTION:
633 # Add extra <flags> to the current LDFLAGS.
634 append-ldflags() {
635 [[ -z $* ]] && return 0
636 local flag
637 for flag in "$@"; do
638 [[ ${flag} == -l* ]] && \
639 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
640 done
641
642 export LDFLAGS="${LDFLAGS} $*"
643 return 0
644 }
645
646 # @FUNCTION: filter-ldflags
647 # @USAGE: <flags>
648 # @DESCRIPTION:
649 # Remove particular <flags> from LDFLAGS. Accepts shell globs.
650 filter-ldflags() {
651 _filter-var LDFLAGS "$@"
652 return 0
653 }
654
655 # @FUNCTION: raw-ldflags
656 # @USAGE: <flags>
657 # @DESCRIPTION:
658 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
659 # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
660 # to gcc where it needs the '-Wl,'.
661 raw-ldflags() {
662 local x input="$@"
663 [[ -z ${input} ]] && input=${LDFLAGS}
664 set --
665 for x in ${input} ; do
666 x=${x#-Wl,}
667 set -- "$@" ${x//,/ }
668 done
669 echo "$@"
670 }
671
672 # @FUNCTION: no-as-needed
673 # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
674 no-as-needed() {
675 case $($(tc-getLD) -v 2>&1 </dev/null) in
676 *GNU*) # GNU ld
677 echo "-Wl,--no-as-needed" ;;
678 esac
679 }
680
681 # Some tests for when we screw with things and want to make
682 # sure we didn't break anything
683 #TESTS() {
684 # CFLAGS="-a -b -c=1"
685 # CXXFLAGS="-x -y -z=2"
686 # LDFLAGS="-l -m -n=3"
687 #
688 # die() { exit 1; }
689 # (is-flag 1 2 3) && die
690 # (is-ldflag 1 2 3) && die
691 #
692 # is-flagq -l && die
693 # is-ldflagq -a && die
694 # is-flagq -a || die
695 # is-flagq -x || die
696 # is-ldflagq -n=* || die
697 # is-ldflagq -n && die
698 #
699 # strip-unsupported-flags
700 # [[ ${CFLAGS} == "-c=1" ]] || die
701 # [[ ${CXXFLAGS} == "-y -z=2" ]] || die
702 #
703 # echo "All tests pass"
704 #}
705 #TESTS

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