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Revision 1.161 - (show annotations) (download)
Thu Dec 15 05:23:15 2011 UTC (2 years, 9 months ago) by vapier
Branch: MAIN
Changes since 1.160: +1 -27 lines
relocate tests to tests/ subdir

1 # Copyright 1999-2011 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 1.160 2011/12/10 20:03:17 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
13 if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14 ___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
16 inherit eutils toolchain-funcs multilib
17
18 ################ DEPRECATED functions ################
19 # The following are still present to avoid breaking existing
20 # code more than necessary; however they are deprecated. Please
21 # use gcc-specs-* from toolchain-funcs.eclass instead, if you
22 # need to know which hardened techs are active in the compiler.
23 # See bug #100974
24 #
25 # has_hardened
26 # has_pie
27 # has_pic
28 # has_ssp_all
29 # has_ssp
30
31
32 # {C,CXX,F,FC}FLAGS that we allow in strip-flags
33 # Note: shell globs and character lists are allowed
34 setup-allowed-flags() {
35 if [[ -z ${ALLOWED_FLAGS} ]] ; then
36 export ALLOWED_FLAGS="-pipe"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
41 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
42 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
43 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
44 fi
45 # allow a bunch of flags that negate features / control ABI
46 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
47 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
48 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
49 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
50 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
51 -mno-popcnt -mno-abm \
52 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
53 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
54 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
55 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
56 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
57 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
58 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
59 -msecure-plt -m*-toc -D* -U*"
60
61 # 4.5
62 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
63 # 4.6
64 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
65 -mno-bmi -mno-tbm"
66
67 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
68 # NOTE: currently -Os have issues with gcc3 and K6* arch's
69 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
70 return 0
71 }
72
73 # inverted filters for hardened compiler. This is trying to unpick
74 # the hardened compiler defaults.
75 _filter-hardened() {
76 local f
77 for f in "$@" ; do
78 case "${f}" in
79 # Ideally we should only concern ourselves with PIE flags,
80 # not -fPIC or -fpic, but too many places filter -fPIC without
81 # thinking about -fPIE.
82 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
83 gcc-specs-pie || continue
84 is-flagq -nopie || append-flags -nopie;;
85 -fstack-protector)
86 gcc-specs-ssp || continue
87 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
88 -fstack-protector-all)
89 gcc-specs-ssp-to-all || continue
90 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
91 -fno-strict-overflow)
92 gcc-specs-nostrict || continue
93 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
94 esac
95 done
96 }
97
98 # Remove occurrences of strings from variable given in $1
99 # Strings removed are matched as globs, so for example
100 # '-O*' would remove -O1, -O2 etc.
101 _filter-var() {
102 local f x VAR VAL
103 declare -a new
104
105 VAR=$1
106 shift
107 eval VAL=\${${VAR}}
108 for f in ${VAL}; do
109 for x in "$@"; do
110 # Note this should work with globs like -O*
111 [[ ${f} == ${x} ]] && continue 2
112 done
113 eval new\[\${\#new\[@]}]=\${f}
114 done
115 eval export ${VAR}=\${new\[*]}
116 }
117
118 # @FUNCTION: filter-flags
119 # @USAGE: <flags>
120 # @DESCRIPTION:
121 # Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
122 filter-flags() {
123 _filter-hardened "$@"
124 _filter-var CFLAGS "$@"
125 _filter-var CPPFLAGS "$@"
126 _filter-var CXXFLAGS "$@"
127 _filter-var FFLAGS "$@"
128 _filter-var FCFLAGS "$@"
129 return 0
130 }
131
132 # @FUNCTION: filter-lfs-flags
133 # @DESCRIPTION:
134 # Remove flags that enable Large File Support.
135 filter-lfs-flags() {
136 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
137 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
138 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
139 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
140 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
141 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
142 }
143
144 # @FUNCTION: append-cppflags
145 # @USAGE: <flags>
146 # @DESCRIPTION:
147 # Add extra <flags> to the current CPPFLAGS.
148 append-cppflags() {
149 [[ $# -eq 0 ]] && return 0
150 export CPPFLAGS="${CPPFLAGS} $*"
151 return 0
152 }
153
154 # @FUNCTION: append-cflags
155 # @USAGE: <flags>
156 # @DESCRIPTION:
157 # Add extra <flags> to the current CFLAGS.
158 append-cflags() {
159 [[ $# -eq 0 ]] && return 0
160 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
161 return 0
162 }
163
164 # @FUNCTION: append-cxxflags
165 # @USAGE: <flags>
166 # @DESCRIPTION:
167 # Add extra <flags> to the current CXXFLAGS.
168 append-cxxflags() {
169 [[ $# -eq 0 ]] && return 0
170 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
171 return 0
172 }
173
174 # @FUNCTION: append-fflags
175 # @USAGE: <flags>
176 # @DESCRIPTION:
177 # Add extra <flags> to the current {F,FC}FLAGS.
178 append-fflags() {
179 [[ $# -eq 0 ]] && return 0
180 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
181 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
182 return 0
183 }
184
185 # @FUNCTION: append-lfs-flags
186 # @DESCRIPTION:
187 # Add flags that enable Large File Support.
188 append-lfs-flags() {
189 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
190 # see comments in filter-lfs-flags func for meaning of these
191 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
192 }
193
194 # @FUNCTION: append-flags
195 # @USAGE: <flags>
196 # @DESCRIPTION:
197 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
198 append-flags() {
199 [[ $# -eq 0 ]] && return 0
200 append-cflags "$@"
201 append-cxxflags "$@"
202 append-fflags "$@"
203 return 0
204 }
205
206 # @FUNCTION: replace-flags
207 # @USAGE: <old> <new>
208 # @DESCRIPTION:
209 # Replace the <old> flag with <new>. Accepts shell globs for <old>.
210 replace-flags() {
211 [[ $# != 2 ]] \
212 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
213 && die "replace-flags takes 2 arguments, not $#"
214
215 local f fset
216 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
217
218 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
219 # Looping over the flags instead of using a global
220 # substitution ensures that we're working with flag atoms.
221 # Otherwise globs like -O* have the potential to wipe out the
222 # list of flags.
223 for f in ${!fset}; do
224 # Note this should work with globs like -O*
225 [[ ${f} == ${1} ]] && f=${2}
226 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
227 done
228 eval export ${fset}=\${new_${fset}\[*]}
229 done
230
231 return 0
232 }
233
234 # @FUNCTION: replace-cpu-flags
235 # @USAGE: <old> <new>
236 # @DESCRIPTION:
237 # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
238 # with flags that select the <new> cpu. Accepts shell globs for <old>.
239 replace-cpu-flags() {
240 local newcpu="$#" ; newcpu="${!newcpu}"
241 while [ $# -gt 1 ] ; do
242 # quote to make sure that no globbing is done (particularly on
243 # ${oldcpu}) prior to calling replace-flags
244 replace-flags "-march=${1}" "-march=${newcpu}"
245 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
246 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
247 shift
248 done
249 return 0
250 }
251
252 _is_flagq() {
253 local x
254 for x in ${!1} ; do
255 [[ ${x} == $2 ]] && return 0
256 done
257 return 1
258 }
259
260 # @FUNCTION: is-flagq
261 # @USAGE: <flag>
262 # @DESCRIPTION:
263 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
264 is-flagq() {
265 [[ -n $2 ]] && die "Usage: is-flag <flag>"
266 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
267 }
268
269 # @FUNCTION: is-flag
270 # @USAGE: <flag>
271 # @DESCRIPTION:
272 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
273 is-flag() {
274 is-flagq "$@" && echo true
275 }
276
277 # @FUNCTION: is-ldflagq
278 # @USAGE: <flag>
279 # @DESCRIPTION:
280 # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
281 is-ldflagq() {
282 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
283 _is_flagq LDFLAGS $1
284 }
285
286 # @FUNCTION: is-ldflag
287 # @USAGE: <flag>
288 # @DESCRIPTION:
289 # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
290 is-ldflag() {
291 is-ldflagq "$@" && echo true
292 }
293
294 # @FUNCTION: filter-mfpmath
295 # @USAGE: <math types>
296 # @DESCRIPTION:
297 # Remove specified math types from the fpmath flag. For example, if the user
298 # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
299 # -mfpmath=386.
300 filter-mfpmath() {
301 local orig_mfpmath new_math prune_math
302
303 # save the original -mfpmath flag
304 orig_mfpmath=$(get-flag -mfpmath)
305 # get the value of the current -mfpmath flag
306 new_math=$(get-flag mfpmath)
307 new_math=" ${new_math//,/ } "
308 # figure out which math values are to be removed
309 prune_math=""
310 for prune_math in "$@" ; do
311 new_math=${new_math/ ${prune_math} / }
312 done
313 new_math=$(echo ${new_math})
314 new_math=${new_math// /,}
315
316 if [[ -z ${new_math} ]] ; then
317 # if we're removing all user specified math values are
318 # slated for removal, then we just filter the flag
319 filter-flags ${orig_mfpmath}
320 else
321 # if we only want to filter some of the user specified
322 # math values, then we replace the current flag
323 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
324 fi
325 return 0
326 }
327
328 # @FUNCTION: strip-flags
329 # @DESCRIPTION:
330 # Strip C[XX]FLAGS of everything except known good/safe flags.
331 strip-flags() {
332 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
333
334 setup-allowed-flags
335
336 local NEW_CFLAGS=""
337 local NEW_CXXFLAGS=""
338 local NEW_FFLAGS=""
339 local NEW_FCFLAGS=""
340
341 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
342 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
343 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
344 fi
345
346 set -f # disable pathname expansion
347
348 for x in ${CFLAGS}; do
349 for y in ${ALLOWED_FLAGS}; do
350 flag=${x%%=*}
351 if [ "${flag%%${y}}" = "" ] ; then
352 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
353 break
354 fi
355 done
356 done
357
358 for x in ${CXXFLAGS}; do
359 for y in ${ALLOWED_FLAGS}; do
360 flag=${x%%=*}
361 if [ "${flag%%${y}}" = "" ] ; then
362 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
363 break
364 fi
365 done
366 done
367
368 for x in ${FFLAGS}; do
369 for y in ${ALLOWED_FLAGS}; do
370 flag=${x%%=*}
371 if [ "${flag%%${y}}" = "" ] ; then
372 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
373 break
374 fi
375 done
376 done
377
378 for x in ${FCFLAGS}; do
379 for y in ${ALLOWED_FLAGS}; do
380 flag=${x%%=*}
381 if [ "${flag%%${y}}" = "" ] ; then
382 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
383 break
384 fi
385 done
386 done
387
388 # In case we filtered out all optimization flags fallback to -O2
389 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
390 NEW_CFLAGS="${NEW_CFLAGS} -O2"
391 fi
392 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
393 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
394 fi
395 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
396 NEW_FFLAGS="${NEW_FFLAGS} -O2"
397 fi
398 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
399 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
400 fi
401
402 set +f # re-enable pathname expansion
403
404 export CFLAGS="${NEW_CFLAGS}"
405 export CXXFLAGS="${NEW_CXXFLAGS}"
406 export FFLAGS="${NEW_FFLAGS}"
407 export FCFLAGS="${NEW_FCFLAGS}"
408 return 0
409 }
410
411 test-flag-PROG() {
412 local comp=$1
413 local flags="$2"
414
415 [[ -z ${comp} || -z ${flags} ]] && return 1
416
417 # use -c so we can test the assembler as well
418 local PROG=$(tc-get${comp})
419 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
420 > /dev/null 2>&1
421 }
422
423 # @FUNCTION: test-flag-CC
424 # @USAGE: <flag>
425 # @DESCRIPTION:
426 # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
427 test-flag-CC() { test-flag-PROG "CC" "$1"; }
428
429 # @FUNCTION: test-flag-CXX
430 # @USAGE: <flag>
431 # @DESCRIPTION:
432 # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
433 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
434
435 # @FUNCTION: test-flag-F77
436 # @USAGE: <flag>
437 # @DESCRIPTION:
438 # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
439 test-flag-F77() { test-flag-PROG "F77" "$1"; }
440
441 # @FUNCTION: test-flag-FC
442 # @USAGE: <flag>
443 # @DESCRIPTION:
444 # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
445 test-flag-FC() { test-flag-PROG "FC" "$1"; }
446
447 test-flags-PROG() {
448 local comp=$1
449 local flags
450 local x
451
452 shift
453
454 [[ -z ${comp} ]] && return 1
455
456 for x in "$@" ; do
457 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
458 done
459
460 echo "${flags}"
461
462 # Just bail if we dont have any flags
463 [[ -n ${flags} ]]
464 }
465
466 # @FUNCTION: test-flags-CC
467 # @USAGE: <flags>
468 # @DESCRIPTION:
469 # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
470 test-flags-CC() { test-flags-PROG "CC" "$@"; }
471
472 # @FUNCTION: test-flags-CXX
473 # @USAGE: <flags>
474 # @DESCRIPTION:
475 # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
476 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
477
478 # @FUNCTION: test-flags-F77
479 # @USAGE: <flags>
480 # @DESCRIPTION:
481 # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
482 test-flags-F77() { test-flags-PROG "F77" "$@"; }
483
484 # @FUNCTION: test-flags-FC
485 # @USAGE: <flags>
486 # @DESCRIPTION:
487 # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
488 test-flags-FC() { test-flags-PROG "FC" "$@"; }
489
490 # @FUNCTION: test-flags
491 # @USAGE: <flags>
492 # @DESCRIPTION:
493 # Short-hand that should hopefully work for both C and C++ compiler, but
494 # its really only present due to the append-flags() abomination.
495 test-flags() { test-flags-CC "$@"; }
496
497 # @FUNCTION: test_version_info
498 # @USAGE: <version>
499 # @DESCRIPTION:
500 # Returns shell true if the current C compiler version matches <version>, else returns shell false.
501 # Accepts shell globs.
502 test_version_info() {
503 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
504 return 0
505 else
506 return 1
507 fi
508 }
509
510 # @FUNCTION: strip-unsupported-flags
511 # @DESCRIPTION:
512 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
513 strip-unsupported-flags() {
514 export CFLAGS=$(test-flags-CC ${CFLAGS})
515 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
516 export FFLAGS=$(test-flags-F77 ${FFLAGS})
517 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
518 }
519
520 # @FUNCTION: get-flag
521 # @USAGE: <flag>
522 # @DESCRIPTION:
523 # Find and echo the value for a particular flag. Accepts shell globs.
524 get-flag() {
525 local f findflag="$1"
526
527 # this code looks a little flaky but seems to work for
528 # everything we want ...
529 # for example, if CFLAGS="-march=i686":
530 # `get-flag -march` == "-march=i686"
531 # `get-flag march` == "i686"
532 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
533 if [ "${f/${findflag}}" != "${f}" ] ; then
534 printf "%s\n" "${f/-${findflag}=}"
535 return 0
536 fi
537 done
538 return 1
539 }
540
541 # DEAD FUNCS. Remove by Dec 2011.
542 test_flag() { die "$0: deprecated, please use test-flags()!" ; }
543 has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
544 has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
545 has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
546 has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
547 has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
548
549 # @FUNCTION: has_m64
550 # @DESCRIPTION:
551 # This doesn't test if the flag is accepted, it tests if the flag actually
552 # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
553 # return code is 0, else the return code is 1.
554 has_m64() {
555 # this doesnt test if the flag is accepted, it tests if the flag
556 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
557 # please dont replace this function with test_flag in some future
558 # clean-up!
559
560 local temp="$(emktemp)"
561 echo "int main() { return(0); }" > "${temp}".c
562 MY_CC=$(tc-getCC)
563 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
564 local ret=$?
565 rm -f "${temp}".c
566 [[ ${ret} != 1 ]] && return 0
567 return 1
568 }
569
570 # @FUNCTION: has_m32
571 # @DESCRIPTION:
572 # This doesn't test if the flag is accepted, it tests if the flag actually
573 # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
574 # code is 0, else return code is 1.
575 has_m32() {
576 # this doesnt test if the flag is accepted, it tests if the flag
577 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
578 # please dont replace this function with test_flag in some future
579 # clean-up!
580
581 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
582
583 local temp=$(emktemp)
584 echo "int main() { return(0); }" > "${temp}".c
585 MY_CC=$(tc-getCC)
586 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
587 local ret=$?
588 rm -f "${temp}".c
589 [[ ${ret} != 1 ]] && return 0
590 return 1
591 }
592
593 # @FUNCTION: replace-sparc64-flags
594 # @DESCRIPTION:
595 # Sets mcpu to v8 and uses the original value as mtune if none specified.
596 replace-sparc64-flags() {
597 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
598
599 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
600 for x in ${SPARC64_CPUS}; do
601 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
602 done
603 else
604 for x in ${SPARC64_CPUS}; do
605 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
606 done
607 fi
608
609 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
610 for x in ${SPARC64_CPUS}; do
611 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
612 done
613 else
614 for x in ${SPARC64_CPUS}; do
615 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
616 done
617 fi
618
619 export CFLAGS CXXFLAGS
620 }
621
622 # @FUNCTION: append-libs
623 # @USAGE: <libs>
624 # @DESCRIPTION:
625 # Add extra <libs> to the current LIBS.
626 append-libs() {
627 [[ $# -eq 0 ]] && return 0
628 local flag
629 for flag in "$@"; do
630 [[ ${flag} == -l* ]] && flag=${flag#-l}
631 export LIBS="${LIBS} -l${flag}"
632 done
633
634 return 0
635 }
636
637 # @FUNCTION: append-ldflags
638 # @USAGE: <flags>
639 # @DESCRIPTION:
640 # Add extra <flags> to the current LDFLAGS.
641 append-ldflags() {
642 [[ $# -eq 0 ]] && return 0
643 local flag
644 for flag in "$@"; do
645 [[ ${flag} == -l* ]] && \
646 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
647 done
648
649 export LDFLAGS="${LDFLAGS} $*"
650 return 0
651 }
652
653 # @FUNCTION: filter-ldflags
654 # @USAGE: <flags>
655 # @DESCRIPTION:
656 # Remove particular <flags> from LDFLAGS. Accepts shell globs.
657 filter-ldflags() {
658 _filter-var LDFLAGS "$@"
659 return 0
660 }
661
662 # @FUNCTION: raw-ldflags
663 # @USAGE: [flags]
664 # @DESCRIPTION:
665 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
666 # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
667 # to gcc where it needs the '-Wl,'.
668 #
669 # If no flags are specified, then default to ${LDFLAGS}.
670 raw-ldflags() {
671 local x input="$@"
672 [[ -z ${input} ]] && input=${LDFLAGS}
673 set --
674 for x in ${input} ; do
675 x=${x#-Wl,}
676 set -- "$@" ${x//,/ }
677 done
678 echo "$@"
679 }
680
681 # @FUNCTION: no-as-needed
682 # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
683 no-as-needed() {
684 case $($(tc-getLD) -v 2>&1 </dev/null) in
685 *GNU*) # GNU ld
686 echo "-Wl,--no-as-needed" ;;
687 esac
688 }
689
690 fi

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