/[gentoo-x86]/eclass/flag-o-matic.eclass
Gentoo

Contents of /eclass/flag-o-matic.eclass

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1.136 - (show annotations) (download)
Sat May 23 23:12:07 2009 UTC (5 years, 5 months ago) by vapier
Branch: MAIN
Changes since 1.135: +14 -5 lines
add a dedicated append-cflags function and define append-flags in terms of other append-*flags functions

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 1.135 2009/05/23 23:06:55 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 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="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-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 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
59 return 0
60 }
61
62 # inverted filters for hardened compiler. This is trying to unpick
63 # the hardened compiler defaults.
64 _filter-hardened() {
65 local f
66 for f in "$@" ; do
67 case "${f}" in
68 # Ideally we should only concern ourselves with PIE flags,
69 # not -fPIC or -fpic, but too many places filter -fPIC without
70 # thinking about -fPIE.
71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
72 gcc-specs-pie || continue
73 is-flagq -nopie || append-flags -nopie;;
74 -fstack-protector)
75 gcc-specs-ssp || continue
76 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
77 -fstack-protector-all)
78 gcc-specs-ssp-to-all || continue
79 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
80 -fno-strict-overflow)
81 gcc-specs-nostrict || continue
82 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
83 esac
84 done
85 }
86
87 # Remove occurrences of strings from variable given in $1
88 # Strings removed are matched as globs, so for example
89 # '-O*' would remove -O1, -O2 etc.
90 _filter-var() {
91 local f x VAR VAL
92 declare -a new
93
94 VAR=$1
95 shift
96 eval VAL=\${${VAR}}
97 for f in ${VAL}; do
98 for x in "$@"; do
99 # Note this should work with globs like -O*
100 [[ ${f} == ${x} ]] && continue 2
101 done
102 eval new\[\${\#new\[@]}]=\${f}
103 done
104 eval export ${VAR}=\${new\[*]}
105 }
106
107 # @FUNCTION: filter-flags
108 # @USAGE: <flags>
109 # @DESCRIPTION:
110 # Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
111 filter-flags() {
112 _filter-hardened "$@"
113 _filter-var CFLAGS "$@"
114 _filter-var CPPFLAGS "$@"
115 _filter-var CXXFLAGS "$@"
116 _filter-var FFLAGS "$@"
117 _filter-var FCFLAGS "$@"
118 return 0
119 }
120
121 # @FUNCTION: filter-lfs-flags
122 # @DESCRIPTION:
123 # Remove flags that enable Large File Support.
124 filter-lfs-flags() {
125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127 }
128
129 # @FUNCTION: append-cppflags
130 # @USAGE: <flags>
131 # @DESCRIPTION:
132 # Add extra <flags> to the current CPPFLAGS.
133 append-cppflags() {
134 [[ -z $* ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*"
136 return 0
137 }
138
139 # @FUNCTION: append-cflags
140 # @USAGE: <flags>
141 # @DESCRIPTION:
142 # Add extra <flags> to the current CFLAGS.
143 append-cppflags() {
144 [[ -z $* ]] && return 0
145 export CFLAGS="${CFLAGS} $*"
146 return 0
147 }
148
149 # @FUNCTION: append-cxxflags
150 # @USAGE: <flags>
151 # @DESCRIPTION:
152 # Add extra <flags> to the current CXXFLAGS.
153 append-cxxflags() {
154 [[ -z $* ]] && return 0
155 export CXXFLAGS="${CXXFLAGS} $*"
156 return 0
157 }
158
159 # @FUNCTION: append-fflags
160 # @USAGE: <flags>
161 # @DESCRIPTION:
162 # Add extra <flags> to the current {F,FC}FLAGS.
163 append-fflags() {
164 [[ -z $* ]] && return 0
165 export FFLAGS="${FFLAGS} $*"
166 export FCFLAGS="${FCFLAGS} $*"
167 return 0
168 }
169
170 # @FUNCTION: append-lfs-flags
171 # @DESCRIPTION:
172 # Add flags that enable Large File Support.
173 append-lfs-flags() {
174 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
175 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
176 }
177
178 # @FUNCTION: append-flags
179 # @USAGE: <flags>
180 # @DESCRIPTION:
181 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
182 append-flags() {
183 [[ -z $* ]] && return 0
184 append-cflags "$@"
185 append-cppflags "$@"
186 append-fflags "$@"
187 return 0
188 }
189
190 # @FUNCTION: replace-flags
191 # @USAGE: <old> <new>
192 # @DESCRIPTION:
193 # Replace the <old> flag with <new>. Accepts shell globs for <old>.
194 replace-flags() {
195 [[ $# != 2 ]] \
196 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
197 && die "replace-flags takes 2 arguments, not $#"
198
199 local f fset
200 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
201
202 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
203 # Looping over the flags instead of using a global
204 # substitution ensures that we're working with flag atoms.
205 # Otherwise globs like -O* have the potential to wipe out the
206 # list of flags.
207 for f in ${!fset}; do
208 # Note this should work with globs like -O*
209 [[ ${f} == ${1} ]] && f=${2}
210 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
211 done
212 eval export ${fset}=\${new_${fset}\[*]}
213 done
214
215 return 0
216 }
217
218 # @FUNCTION: replace-cpu-flags
219 # @USAGE: <old> <new>
220 # @DESCRIPTION:
221 # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
222 # with flags that select the <new> cpu. Accepts shell globs for <old>.
223 replace-cpu-flags() {
224 local newcpu="$#" ; newcpu="${!newcpu}"
225 while [ $# -gt 1 ] ; do
226 # quote to make sure that no globbing is done (particularly on
227 # ${oldcpu}) prior to calling replace-flags
228 replace-flags "-march=${1}" "-march=${newcpu}"
229 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
230 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
231 shift
232 done
233 return 0
234 }
235
236 _is_flagq() {
237 local x
238 for x in ${!1} ; do
239 [[ ${x} == $2 ]] && return 0
240 done
241 return 1
242 }
243
244 # @FUNCTION: is-flagq
245 # @USAGE: <flag>
246 # @DESCRIPTION:
247 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
248 is-flagq() {
249 [[ -n $2 ]] && die "Usage: is-flag <flag>"
250 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
251 }
252
253 # @FUNCTION: is-flag
254 # @USAGE: <flag>
255 # @DESCRIPTION:
256 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
257 is-flag() {
258 is-flagq "$@" && echo true
259 }
260
261 # @FUNCTION: is-ldflagq
262 # @USAGE: <flag>
263 # @DESCRIPTION:
264 # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
265 is-ldflagq() {
266 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
267 _is_flagq LDFLAGS $1
268 }
269
270 # @FUNCTION: is-ldflag
271 # @USAGE: <flag>
272 # @DESCRIPTION:
273 # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
274 is-ldflag() {
275 is-ldflagq "$@" && echo true
276 }
277
278 # @FUNCTION: filter-mfpmath
279 # @USAGE: <math types>
280 # @DESCRIPTION:
281 # Remove specified math types from the fpmath flag. For example, if the user
282 # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
283 # -mfpmath=386.
284 filter-mfpmath() {
285 local orig_mfpmath new_math prune_math
286
287 # save the original -mfpmath flag
288 orig_mfpmath=$(get-flag -mfpmath)
289 # get the value of the current -mfpmath flag
290 new_math=$(get-flag mfpmath)
291 new_math=" ${new_math//,/ } "
292 # figure out which math values are to be removed
293 prune_math=""
294 for prune_math in "$@" ; do
295 new_math=${new_math/ ${prune_math} / }
296 done
297 new_math=$(echo ${new_math})
298 new_math=${new_math// /,}
299
300 if [[ -z ${new_math} ]] ; then
301 # if we're removing all user specified math values are
302 # slated for removal, then we just filter the flag
303 filter-flags ${orig_mfpmath}
304 else
305 # if we only want to filter some of the user specified
306 # math values, then we replace the current flag
307 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
308 fi
309 return 0
310 }
311
312 # @FUNCTION: strip-flags
313 # @DESCRIPTION:
314 # Strip C[XX]FLAGS of everything except known good/safe flags.
315 strip-flags() {
316 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
317
318 setup-allowed-flags
319
320 local NEW_CFLAGS=""
321 local NEW_CXXFLAGS=""
322 local NEW_FFLAGS=""
323 local NEW_FCFLAGS=""
324
325 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
326 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
327 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
328 fi
329
330 set -f # disable pathname expansion
331
332 for x in ${CFLAGS}; do
333 for y in ${ALLOWED_FLAGS}; do
334 flag=${x%%=*}
335 if [ "${flag%%${y}}" = "" ] ; then
336 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
337 break
338 fi
339 done
340 done
341
342 for x in ${CXXFLAGS}; do
343 for y in ${ALLOWED_FLAGS}; do
344 flag=${x%%=*}
345 if [ "${flag%%${y}}" = "" ] ; then
346 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
347 break
348 fi
349 done
350 done
351
352 for x in ${FFLAGS}; do
353 for y in ${ALLOWED_FLAGS}; do
354 flag=${x%%=*}
355 if [ "${flag%%${y}}" = "" ] ; then
356 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
357 break
358 fi
359 done
360 done
361
362 for x in ${FCFLAGS}; do
363 for y in ${ALLOWED_FLAGS}; do
364 flag=${x%%=*}
365 if [ "${flag%%${y}}" = "" ] ; then
366 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
367 break
368 fi
369 done
370 done
371
372 # In case we filtered out all optimization flags fallback to -O2
373 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
374 NEW_CFLAGS="${NEW_CFLAGS} -O2"
375 fi
376 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
377 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
378 fi
379 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
380 NEW_FFLAGS="${NEW_FFLAGS} -O2"
381 fi
382 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
383 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
384 fi
385
386 set +f # re-enable pathname expansion
387
388 export CFLAGS="${NEW_CFLAGS}"
389 export CXXFLAGS="${NEW_CXXFLAGS}"
390 export FFLAGS="${NEW_FFLAGS}"
391 export FCFLAGS="${NEW_FCFLAGS}"
392 return 0
393 }
394
395 test-flag-PROG() {
396 local comp=$1
397 local flags="$2"
398
399 [[ -z ${comp} || -z ${flags} ]] && \
400 return 1
401
402 local PROG=$(tc-get${comp})
403 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
404 > /dev/null 2>&1
405 }
406
407 # @FUNCTION: test-flag-CC
408 # @USAGE: <flag>
409 # @DESCRIPTION:
410 # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
411 test-flag-CC() { test-flag-PROG "CC" "$1"; }
412
413 # @FUNCTION: test-flag-CXX
414 # @USAGE: <flag>
415 # @DESCRIPTION:
416 # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
417 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
418
419 # @FUNCTION: test-flag-F77
420 # @USAGE: <flag>
421 # @DESCRIPTION:
422 # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
423 test-flag-F77() { test-flag-PROG "F77" "$1"; }
424
425 # @FUNCTION: test-flag-FC
426 # @USAGE: <flag>
427 # @DESCRIPTION:
428 # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
429 test-flag-FC() { test-flag-PROG "FC" "$1"; }
430
431 test-flags-PROG() {
432 local comp=$1
433 local flags
434 local x
435
436 shift
437
438 [[ -z ${comp} ]] && return 1
439
440 x=""
441 for x in "$@" ; do
442 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
443 done
444
445 echo "${flags}"
446
447 # Just bail if we dont have any flags
448 [[ -n ${flags} ]]
449 }
450
451 # @FUNCTION: test-flags-CC
452 # @USAGE: <flags>
453 # @DESCRIPTION:
454 # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
455 test-flags-CC() { test-flags-PROG "CC" "$@"; }
456
457 # @FUNCTION: test-flags-CXX
458 # @USAGE: <flags>
459 # @DESCRIPTION:
460 # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
461 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
462
463 # @FUNCTION: test-flags-F77
464 # @USAGE: <flags>
465 # @DESCRIPTION:
466 # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
467 test-flags-F77() { test-flags-PROG "F77" "$@"; }
468
469 # @FUNCTION: test-flags-FC
470 # @USAGE: <flags>
471 # @DESCRIPTION:
472 # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
473 test-flags-FC() { test-flags-PROG "FC" "$@"; }
474
475 # @FUNCTION: test-flags
476 # @USAGE: <flags>
477 # @DESCRIPTION:
478 # Short-hand that should hopefully work for both C and C++ compiler, but
479 # its really only present due to the append-flags() abomination.
480 test-flags() { test-flags-CC "$@"; }
481
482 # @FUNCTION: test_flag
483 # @DESCRIPTION:
484 # DEPRICIATED, use test-flags()
485 test_flag() {
486 ewarn "test_flag: deprecated, please use test-flags()!" >&2
487
488 test-flags-CC "$@"
489 }
490
491 # @FUNCTION: test_version_info
492 # @USAGE: <version>
493 # @DESCRIPTION:
494 # Returns shell true if the current C compiler version matches <version>, else returns shell false.
495 # Accepts shell globs.
496 test_version_info() {
497 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
498 return 0
499 else
500 return 1
501 fi
502 }
503
504 # @FUNCTION: strip-unsupported-flags
505 # @DESCRIPTION:
506 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
507 strip-unsupported-flags() {
508 export CFLAGS=$(test-flags-CC ${CFLAGS})
509 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
510 export FFLAGS=$(test-flags-F77 ${FFLAGS})
511 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
512 }
513
514 # @FUNCTION: get-flag
515 # @USAGE: <flag>
516 # @DESCRIPTION:
517 # Find and echo the value for a particular flag. Accepts shell globs.
518 get-flag() {
519 local f findflag="$1"
520
521 # this code looks a little flaky but seems to work for
522 # everything we want ...
523 # for example, if CFLAGS="-march=i686":
524 # `get-flag -march` == "-march=i686"
525 # `get-flag march` == "i686"
526 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
527 if [ "${f/${findflag}}" != "${f}" ] ; then
528 printf "%s\n" "${f/-${findflag}=}"
529 return 0
530 fi
531 done
532 return 1
533 }
534
535 # @FUNCTION: has_hardened
536 # @DESCRIPTION:
537 # DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
538 has_hardened() {
539 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
540
541 test_version_info Hardened && return 0
542 # The specs file wont exist unless gcc has GCC_SPECS support
543 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
544 }
545
546 # @FUNCTION: has_pic
547 # @DESCRIPTION:
548 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
549 # indicate whether PIC is set
550 has_pic() {
551 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
552
553 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
554 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
555 gcc-specs-pie
556 }
557
558 # @FUNCTION: has_pie
559 # @DESCRIPTION:
560 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
561 # indicate whether PIE is set
562 has_pie() {
563 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
564
565 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
566 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
567 gcc-specs-pie
568 }
569
570 # @FUNCTION: has_ssp_all
571 # @DESCRIPTION:
572 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
573 # indicate whether code for SSP is being generated for all functions
574 has_ssp_all() {
575 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
576
577 # note; this matches only -fstack-protector-all
578 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
579 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
580 gcc-specs-ssp-to-all
581 }
582
583 # @FUNCTION: has_ssp
584 # @DESCRIPTION:
585 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
586 # indicate whether code for SSP is being generated
587 has_ssp() {
588 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
589
590 # note; this matches both -fstack-protector and -fstack-protector-all
591 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
592 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
593 gcc-specs-ssp
594 }
595
596 # @FUNCTION: has_m64
597 # @DESCRIPTION:
598 # This doesn't test if the flag is accepted, it tests if the flag actually
599 # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
600 # return code is 0, else the return code is 1.
601 has_m64() {
602 # this doesnt test if the flag is accepted, it tests if the flag
603 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
604 # please dont replace this function with test_flag in some future
605 # clean-up!
606
607 local temp="$(emktemp)"
608 echo "int main() { return(0); }" > "${temp}".c
609 MY_CC=$(tc-getCC)
610 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
611 local ret=$?
612 rm -f "${temp}".c
613 [[ ${ret} != 1 ]] && return 0
614 return 1
615 }
616
617 # @FUNCTION: has_m32
618 # @DESCRIPTION:
619 # This doesn't test if the flag is accepted, it tests if the flag actually
620 # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
621 # code is 0, else return code is 1.
622 has_m32() {
623 # this doesnt test if the flag is accepted, it tests if the flag
624 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
625 # please dont replace this function with test_flag in some future
626 # clean-up!
627
628 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
629
630 local temp=$(emktemp)
631 echo "int main() { return(0); }" > "${temp}".c
632 MY_CC=$(tc-getCC)
633 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
634 local ret=$?
635 rm -f "${temp}".c
636 [[ ${ret} != 1 ]] && return 0
637 return 1
638 }
639
640 # @FUNCTION: replace-sparc64-flags
641 # @DESCRIPTION:
642 # Sets mcpu to v8 and uses the original value as mtune if none specified.
643 replace-sparc64-flags() {
644 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
645
646 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
647 for x in ${SPARC64_CPUS}; do
648 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
649 done
650 else
651 for x in ${SPARC64_CPUS}; do
652 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
653 done
654 fi
655
656 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
657 for x in ${SPARC64_CPUS}; do
658 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
659 done
660 else
661 for x in ${SPARC64_CPUS}; do
662 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
663 done
664 fi
665
666 export CFLAGS CXXFLAGS
667 }
668
669 # @FUNCTION: append-ldflags
670 # @USAGE: <flags>
671 # @DESCRIPTION:
672 # Add extra <flags> to the current LDFLAGS.
673 append-ldflags() {
674 [[ -z $* ]] && return 0
675 local flag
676 for flag in "$@"; do
677 [[ ${flag} == -l* ]] && \
678 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
679 done
680
681 export LDFLAGS="${LDFLAGS} $*"
682 return 0
683 }
684
685 # @FUNCTION: filter-ldflags
686 # @USAGE: <flags>
687 # @DESCRIPTION:
688 # Remove particular <flags> from LDFLAGS. Accepts shell globs.
689 filter-ldflags() {
690 _filter-var LDFLAGS "$@"
691 return 0
692 }
693
694 # @FUNCTION: raw-ldflags
695 # @USAGE: <flags>
696 # @DESCRIPTION:
697 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
698 # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
699 # to gcc where it needs the '-Wl,'.
700 raw-ldflags() {
701 local x input="$@"
702 [[ -z ${input} ]] && input=${LDFLAGS}
703 set --
704 for x in ${input} ; do
705 x=${x#-Wl,}
706 set -- "$@" ${x//,/ }
707 done
708 echo "$@"
709 }
710
711 # @FUNCTION: bindnow-flags
712 # @RETURN: Returns the flags to enable "now" binding in the current selected linker.
713 # @DESCRIPTION:
714 # DEPRECATED - Gets the flags needed for "NOW" binding
715 bindnow-flags() {
716 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
717 }
718
719
720 # Some tests for when we screw with things and want to make
721 # sure we didn't break anything
722 #TESTS() {
723 # CFLAGS="-a -b -c=1"
724 # CXXFLAGS="-x -y -z=2"
725 # LDFLAGS="-l -m -n=3"
726 #
727 # die() { exit 1; }
728 # (is-flag 1 2 3) && die
729 # (is-ldflag 1 2 3) && die
730 #
731 # is-flagq -l && die
732 # is-ldflagq -a && die
733 # is-flagq -a || die
734 # is-flagq -x || die
735 # is-ldflagq -n=* || die
736 # is-ldflagq -n && die
737 #
738 # strip-unsupported-flags
739 # [[ ${CFLAGS} == "-c=1" ]] || die
740 # [[ ${CXXFLAGS} == "-y -z=2" ]] || die
741 #
742 # echo "All tests pass"
743 #}
744 #TESTS

  ViewVC Help
Powered by ViewVC 1.1.20