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Revision 1.133 - (show annotations) (download)
Sat Apr 4 17:57:54 2009 UTC (5 years, 8 months ago) by grobian
Branch: MAIN
Changes since 1.132: +7 -1 lines
backport fix for x86-macos in filter-flags from Prefix

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 1.132 2009/01/21 00:42:20 gengor 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="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
41 fi
42 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -m*-toc -D* -U*"
55
56 # killing these two on OSX/Intel will disable SSE, resulting in failing
57 # compilations, as the headers expect SSE to be enabled (Apple knows what
58 # hardware they run on afterall, don't they?)
59 [[ ${CHOST} == i?86-apple-darwin* ]] \
60 && ALLOWED_FLAGS="${ALLOWED_FLAGS} -march=prescott -march=nocona"
61
62 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
63 # NOTE: currently -Os have issues with gcc3 and K6* arch's
64 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
65 return 0
66 }
67
68 # inverted filters for hardened compiler. This is trying to unpick
69 # the hardened compiler defaults.
70 _filter-hardened() {
71 local f
72 for f in "$@" ; do
73 case "${f}" in
74 # Ideally we should only concern ourselves with PIE flags,
75 # not -fPIC or -fpic, but too many places filter -fPIC without
76 # thinking about -fPIE.
77 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
78 gcc-specs-pie || continue
79 is-flagq -nopie || append-flags -nopie;;
80 -fstack-protector)
81 gcc-specs-ssp || continue
82 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
83 -fstack-protector-all)
84 gcc-specs-ssp-to-all || continue
85 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
86 -fno-strict-overflow)
87 gcc-specs-nostrict || continue
88 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
89 esac
90 done
91 }
92
93 # Remove occurrences of strings from variable given in $1
94 # Strings removed are matched as globs, so for example
95 # '-O*' would remove -O1, -O2 etc.
96 _filter-var() {
97 local f x VAR VAL
98 declare -a new
99
100 VAR=$1
101 shift
102 eval VAL=\${${VAR}}
103 for f in ${VAL}; do
104 for x in "$@"; do
105 # Note this should work with globs like -O*
106 [[ ${f} == ${x} ]] && continue 2
107 done
108 eval new\[\${\#new\[@]}]=\${f}
109 done
110 eval export ${VAR}=\${new\[*]}
111 }
112
113 # @FUNCTION: filter-flags
114 # @USAGE: <flags>
115 # @DESCRIPTION:
116 # Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
117 filter-flags() {
118 _filter-hardened "$@"
119 _filter-var CFLAGS "$@"
120 _filter-var CPPFLAGS "$@"
121 _filter-var CXXFLAGS "$@"
122 _filter-var FFLAGS "$@"
123 _filter-var FCFLAGS "$@"
124 return 0
125 }
126
127 # @FUNCTION: filter-lfs-flags
128 # @DESCRIPTION:
129 # Remove flags that enable Large File Support.
130 filter-lfs-flags() {
131 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
132 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
133 }
134
135 # @FUNCTION: append-cppflags
136 # @USAGE: <flags>
137 # @DESCRIPTION:
138 # Add extra <flags> to the current CPPFLAGS.
139 append-cppflags() {
140 [[ -z $* ]] && return 0
141 export CPPFLAGS="${CPPFLAGS} $*"
142 return 0
143 }
144
145 # @FUNCTION: append-cxxflags
146 # @USAGE: <flags>
147 # @DESCRIPTION:
148 # Add extra <flags> to the current CXXFLAGS.
149 append-cxxflags() {
150 [[ -z $* ]] && return 0
151 export CXXFLAGS="${CXXFLAGS} $*"
152 return 0
153 }
154
155 # @FUNCTION: append-fflags
156 # @USAGE: <flags>
157 # @DESCRIPTION:
158 # Add extra <flags> to the current {F,FC}FLAGS.
159 append-fflags() {
160 [[ -z $* ]] && return 0
161 export FFLAGS="${FFLAGS} $*"
162 export FCFLAGS="${FCFLAGS} $*"
163 return 0
164 }
165
166 # @FUNCTION: append-lfs-flags
167 # @DESCRIPTION:
168 # Add flags that enable Large File Support.
169 append-lfs-flags() {
170 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
171 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
172 }
173
174 # @FUNCTION: append-flags
175 # @USAGE: <flags>
176 # @DESCRIPTION:
177 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
178 append-flags() {
179 [[ -z $* ]] && return 0
180 export CFLAGS="${CFLAGS} $*"
181 export CXXFLAGS="${CXXFLAGS} $*"
182 export FFLAGS="${FFLAGS} $*"
183 export FCFLAGS="${FCFLAGS} $*"
184 return 0
185 }
186
187 # @FUNCTION: replace-flags
188 # @USAGE: <old> <new>
189 # @DESCRIPTION:
190 # Replace the <old> flag with <new>. Accepts shell globs for <old>.
191 replace-flags() {
192 [[ $# != 2 ]] \
193 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
194 && die "replace-flags takes 2 arguments, not $#"
195
196 local f fset
197 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
198
199 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
200 # Looping over the flags instead of using a global
201 # substitution ensures that we're working with flag atoms.
202 # Otherwise globs like -O* have the potential to wipe out the
203 # list of flags.
204 for f in ${!fset}; do
205 # Note this should work with globs like -O*
206 [[ ${f} == ${1} ]] && f=${2}
207 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
208 done
209 eval export ${fset}=\${new_${fset}\[*]}
210 done
211
212 return 0
213 }
214
215 # @FUNCTION: replace-cpu-flags
216 # @USAGE: <old> <new>
217 # @DESCRIPTION:
218 # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
219 # with flags that select the <new> cpu. Accepts shell globs for <old>.
220 replace-cpu-flags() {
221 local newcpu="$#" ; newcpu="${!newcpu}"
222 while [ $# -gt 1 ] ; do
223 # quote to make sure that no globbing is done (particularly on
224 # ${oldcpu}) prior to calling replace-flags
225 replace-flags "-march=${1}" "-march=${newcpu}"
226 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
227 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
228 shift
229 done
230 return 0
231 }
232
233 _is_flagq() {
234 local x
235 for x in ${!1} ; do
236 [[ ${x} == $2 ]] && return 0
237 done
238 return 1
239 }
240
241 # @FUNCTION: is-flagq
242 # @USAGE: <flag>
243 # @DESCRIPTION:
244 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
245 is-flagq() {
246 [[ -n $2 ]] && die "Usage: is-flag <flag>"
247 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
248 }
249
250 # @FUNCTION: is-flag
251 # @USAGE: <flag>
252 # @DESCRIPTION:
253 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
254 is-flag() {
255 is-flagq "$@" && echo true
256 }
257
258 # @FUNCTION: is-ldflagq
259 # @USAGE: <flag>
260 # @DESCRIPTION:
261 # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
262 is-ldflagq() {
263 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
264 _is_flagq LDFLAGS $1
265 }
266
267 # @FUNCTION: is-ldflag
268 # @USAGE: <flag>
269 # @DESCRIPTION:
270 # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
271 is-ldflag() {
272 is-ldflagq "$@" && echo true
273 }
274
275 # @FUNCTION: filter-mfpmath
276 # @USAGE: <math types>
277 # @DESCRIPTION:
278 # Remove specified math types from the fpmath flag. For example, if the user
279 # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
280 # -mfpmath=386.
281 filter-mfpmath() {
282 local orig_mfpmath new_math prune_math
283
284 # save the original -mfpmath flag
285 orig_mfpmath=$(get-flag -mfpmath)
286 # get the value of the current -mfpmath flag
287 new_math=$(get-flag mfpmath)
288 new_math=" ${new_math//,/ } "
289 # figure out which math values are to be removed
290 prune_math=""
291 for prune_math in "$@" ; do
292 new_math=${new_math/ ${prune_math} / }
293 done
294 new_math=$(echo ${new_math})
295 new_math=${new_math// /,}
296
297 if [[ -z ${new_math} ]] ; then
298 # if we're removing all user specified math values are
299 # slated for removal, then we just filter the flag
300 filter-flags ${orig_mfpmath}
301 else
302 # if we only want to filter some of the user specified
303 # math values, then we replace the current flag
304 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
305 fi
306 return 0
307 }
308
309 # @FUNCTION: strip-flags
310 # @DESCRIPTION:
311 # Strip C[XX]FLAGS of everything except known good/safe flags.
312 strip-flags() {
313 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
314
315 setup-allowed-flags
316
317 local NEW_CFLAGS=""
318 local NEW_CXXFLAGS=""
319 local NEW_FFLAGS=""
320 local NEW_FCFLAGS=""
321
322 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
323 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
324 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
325 fi
326
327 set -f # disable pathname expansion
328
329 for x in ${CFLAGS}; do
330 for y in ${ALLOWED_FLAGS}; do
331 flag=${x%%=*}
332 if [ "${flag%%${y}}" = "" ] ; then
333 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
334 break
335 fi
336 done
337 done
338
339 for x in ${CXXFLAGS}; do
340 for y in ${ALLOWED_FLAGS}; do
341 flag=${x%%=*}
342 if [ "${flag%%${y}}" = "" ] ; then
343 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
344 break
345 fi
346 done
347 done
348
349 for x in ${FFLAGS}; do
350 for y in ${ALLOWED_FLAGS}; do
351 flag=${x%%=*}
352 if [ "${flag%%${y}}" = "" ] ; then
353 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
354 break
355 fi
356 done
357 done
358
359 for x in ${FCFLAGS}; do
360 for y in ${ALLOWED_FLAGS}; do
361 flag=${x%%=*}
362 if [ "${flag%%${y}}" = "" ] ; then
363 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
364 break
365 fi
366 done
367 done
368
369 # In case we filtered out all optimization flags fallback to -O2
370 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
371 NEW_CFLAGS="${NEW_CFLAGS} -O2"
372 fi
373 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
374 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
375 fi
376 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
377 NEW_FFLAGS="${NEW_FFLAGS} -O2"
378 fi
379 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
380 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
381 fi
382
383 set +f # re-enable pathname expansion
384
385 export CFLAGS="${NEW_CFLAGS}"
386 export CXXFLAGS="${NEW_CXXFLAGS}"
387 export FFLAGS="${NEW_FFLAGS}"
388 export FCFLAGS="${NEW_FCFLAGS}"
389 return 0
390 }
391
392 test-flag-PROG() {
393 local comp=$1
394 local flags="$2"
395
396 [[ -z ${comp} || -z ${flags} ]] && \
397 return 1
398
399 local PROG=$(tc-get${comp})
400 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
401 > /dev/null 2>&1
402 }
403
404 # @FUNCTION: test-flag-CC
405 # @USAGE: <flag>
406 # @DESCRIPTION:
407 # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
408 test-flag-CC() { test-flag-PROG "CC" "$1"; }
409
410 # @FUNCTION: test-flag-CXX
411 # @USAGE: <flag>
412 # @DESCRIPTION:
413 # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
414 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
415
416 # @FUNCTION: test-flag-F77
417 # @USAGE: <flag>
418 # @DESCRIPTION:
419 # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
420 test-flag-F77() { test-flag-PROG "F77" "$1"; }
421
422 # @FUNCTION: test-flag-FC
423 # @USAGE: <flag>
424 # @DESCRIPTION:
425 # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
426 test-flag-FC() { test-flag-PROG "FC" "$1"; }
427
428 test-flags-PROG() {
429 local comp=$1
430 local flags
431 local x
432
433 shift
434
435 [[ -z ${comp} ]] && return 1
436
437 x=""
438 for x in "$@" ; do
439 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
440 done
441
442 echo "${flags}"
443
444 # Just bail if we dont have any flags
445 [[ -n ${flags} ]]
446 }
447
448 # @FUNCTION: test-flags-CC
449 # @USAGE: <flags>
450 # @DESCRIPTION:
451 # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
452 test-flags-CC() { test-flags-PROG "CC" "$@"; }
453
454 # @FUNCTION: test-flags-CXX
455 # @USAGE: <flags>
456 # @DESCRIPTION:
457 # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
458 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
459
460 # @FUNCTION: test-flags-F77
461 # @USAGE: <flags>
462 # @DESCRIPTION:
463 # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
464 test-flags-F77() { test-flags-PROG "F77" "$@"; }
465
466 # @FUNCTION: test-flags-FC
467 # @USAGE: <flags>
468 # @DESCRIPTION:
469 # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
470 test-flags-FC() { test-flags-PROG "FC" "$@"; }
471
472 # @FUNCTION: test-flags
473 # @USAGE: <flags>
474 # @DESCRIPTION:
475 # Short-hand that should hopefully work for both C and C++ compiler, but
476 # its really only present due to the append-flags() abomination.
477 test-flags() { test-flags-CC "$@"; }
478
479 # @FUNCTION: test_flag
480 # @DESCRIPTION:
481 # DEPRICIATED, use test-flags()
482 test_flag() {
483 ewarn "test_flag: deprecated, please use test-flags()!" >&2
484
485 test-flags-CC "$@"
486 }
487
488 # @FUNCTION: test_version_info
489 # @USAGE: <version>
490 # @DESCRIPTION:
491 # Returns shell true if the current C compiler version matches <version>, else returns shell false.
492 # Accepts shell globs.
493 test_version_info() {
494 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
495 return 0
496 else
497 return 1
498 fi
499 }
500
501 # @FUNCTION: strip-unsupported-flags
502 # @DESCRIPTION:
503 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
504 strip-unsupported-flags() {
505 export CFLAGS=$(test-flags-CC ${CFLAGS})
506 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
507 export FFLAGS=$(test-flags-F77 ${FFLAGS})
508 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
509 }
510
511 # @FUNCTION: get-flag
512 # @USAGE: <flag>
513 # @DESCRIPTION:
514 # Find and echo the value for a particular flag. Accepts shell globs.
515 get-flag() {
516 local f findflag="$1"
517
518 # this code looks a little flaky but seems to work for
519 # everything we want ...
520 # for example, if CFLAGS="-march=i686":
521 # `get-flag -march` == "-march=i686"
522 # `get-flag march` == "i686"
523 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
524 if [ "${f/${findflag}}" != "${f}" ] ; then
525 printf "%s\n" "${f/-${findflag}=}"
526 return 0
527 fi
528 done
529 return 1
530 }
531
532 # @FUNCTION: has_hardened
533 # @DESCRIPTION:
534 # DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
535 has_hardened() {
536 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
537
538 test_version_info Hardened && return 0
539 # The specs file wont exist unless gcc has GCC_SPECS support
540 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
541 }
542
543 # @FUNCTION: has_pic
544 # @DESCRIPTION:
545 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
546 # indicate whether PIC is set
547 has_pic() {
548 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
549
550 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
551 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
552 gcc-specs-pie
553 }
554
555 # @FUNCTION: has_pie
556 # @DESCRIPTION:
557 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
558 # indicate whether PIE is set
559 has_pie() {
560 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
561
562 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
563 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
564 gcc-specs-pie
565 }
566
567 # @FUNCTION: has_ssp_all
568 # @DESCRIPTION:
569 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
570 # indicate whether code for SSP is being generated for all functions
571 has_ssp_all() {
572 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
573
574 # note; this matches only -fstack-protector-all
575 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
576 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
577 gcc-specs-ssp-to-all
578 }
579
580 # @FUNCTION: has_ssp
581 # @DESCRIPTION:
582 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
583 # indicate whether code for SSP is being generated
584 has_ssp() {
585 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
586
587 # note; this matches both -fstack-protector and -fstack-protector-all
588 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
589 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
590 gcc-specs-ssp
591 }
592
593 # @FUNCTION: has_m64
594 # @DESCRIPTION:
595 # This doesn't test if the flag is accepted, it tests if the flag actually
596 # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
597 # return code is 0, else the return code is 1.
598 has_m64() {
599 # this doesnt test if the flag is accepted, it tests if the flag
600 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
601 # please dont replace this function with test_flag in some future
602 # clean-up!
603
604 local temp="$(emktemp)"
605 echo "int main() { return(0); }" > "${temp}".c
606 MY_CC=$(tc-getCC)
607 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
608 local ret=$?
609 rm -f "${temp}".c
610 [[ ${ret} != 1 ]] && return 0
611 return 1
612 }
613
614 # @FUNCTION: has_m32
615 # @DESCRIPTION:
616 # This doesn't test if the flag is accepted, it tests if the flag actually
617 # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
618 # code is 0, else return code is 1.
619 has_m32() {
620 # this doesnt test if the flag is accepted, it tests if the flag
621 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
622 # please dont replace this function with test_flag in some future
623 # clean-up!
624
625 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
626
627 local temp=$(emktemp)
628 echo "int main() { return(0); }" > "${temp}".c
629 MY_CC=$(tc-getCC)
630 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
631 local ret=$?
632 rm -f "${temp}".c
633 [[ ${ret} != 1 ]] && return 0
634 return 1
635 }
636
637 # @FUNCTION: replace-sparc64-flags
638 # @DESCRIPTION:
639 # Sets mcpu to v8 and uses the original value as mtune if none specified.
640 replace-sparc64-flags() {
641 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
642
643 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
644 for x in ${SPARC64_CPUS}; do
645 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
646 done
647 else
648 for x in ${SPARC64_CPUS}; do
649 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
650 done
651 fi
652
653 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
654 for x in ${SPARC64_CPUS}; do
655 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
656 done
657 else
658 for x in ${SPARC64_CPUS}; do
659 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
660 done
661 fi
662
663 export CFLAGS CXXFLAGS
664 }
665
666 # @FUNCTION: append-ldflags
667 # @USAGE: <flags>
668 # @DESCRIPTION:
669 # Add extra <flags> to the current LDFLAGS.
670 append-ldflags() {
671 [[ -z $* ]] && return 0
672 local flag
673 for flag in "$@"; do
674 [[ ${flag} == -l* ]] && \
675 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
676 done
677
678 export LDFLAGS="${LDFLAGS} $*"
679 return 0
680 }
681
682 # @FUNCTION: filter-ldflags
683 # @USAGE: <flags>
684 # @DESCRIPTION:
685 # Remove particular <flags> from LDFLAGS. Accepts shell globs.
686 filter-ldflags() {
687 _filter-var LDFLAGS "$@"
688 return 0
689 }
690
691 # @FUNCTION: raw-ldflags
692 # @USAGE: <flags>
693 # @DESCRIPTION:
694 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
695 # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
696 # to gcc where it needs the '-Wl,'.
697 raw-ldflags() {
698 local x input="$@"
699 [[ -z ${input} ]] && input=${LDFLAGS}
700 set --
701 for x in ${input} ; do
702 x=${x#-Wl,}
703 set -- "$@" ${x//,/ }
704 done
705 echo "$@"
706 }
707
708 # @FUNCTION: bindnow-flags
709 # @RETURN: Returns the flags to enable "now" binding in the current selected linker.
710 # @DESCRIPTION:
711 # DEPRECATED - Gets the flags needed for "NOW" binding
712 bindnow-flags() {
713 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
714 }
715
716
717 # Some tests for when we screw with things and want to make
718 # sure we didn't break anything
719 #TESTS() {
720 # CFLAGS="-a -b -c=1"
721 # CXXFLAGS="-x -y -z=2"
722 # LDFLAGS="-l -m -n=3"
723 #
724 # die() { exit 1; }
725 # (is-flag 1 2 3) && die
726 # (is-ldflag 1 2 3) && die
727 #
728 # is-flagq -l && die
729 # is-ldflagq -a && die
730 # is-flagq -a || die
731 # is-flagq -x || die
732 # is-ldflagq -n=* || die
733 # is-ldflagq -n && die
734 #
735 # strip-unsupported-flags
736 # [[ ${CFLAGS} == "-c=1" ]] || die
737 # [[ ${CXXFLAGS} == "-y -z=2" ]] || die
738 #
739 # echo "All tests pass"
740 #}
741 #TESTS

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