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Revision 1.148 - (show annotations) (download)
Sat May 8 03:47:41 2010 UTC (4 years, 3 months ago) by dirtyepic
Branch: MAIN
Changes since 1.147: +4 -1 lines
Add 4.5 -mno-* flags to exception list.

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 1.147 2010/04/02 02:50:29 abcd 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-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 \
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="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60
61 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
62 # NOTE: currently -Os have issues with gcc3 and K6* arch's
63 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
64 return 0
65 }
66
67 # inverted filters for hardened compiler. This is trying to unpick
68 # the hardened compiler defaults.
69 _filter-hardened() {
70 local f
71 for f in "$@" ; do
72 case "${f}" in
73 # Ideally we should only concern ourselves with PIE flags,
74 # not -fPIC or -fpic, but too many places filter -fPIC without
75 # thinking about -fPIE.
76 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
77 gcc-specs-pie || continue
78 is-flagq -nopie || append-flags -nopie;;
79 -fstack-protector)
80 gcc-specs-ssp || continue
81 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
82 -fstack-protector-all)
83 gcc-specs-ssp-to-all || continue
84 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
85 -fno-strict-overflow)
86 gcc-specs-nostrict || continue
87 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
88 esac
89 done
90 }
91
92 # Remove occurrences of strings from variable given in $1
93 # Strings removed are matched as globs, so for example
94 # '-O*' would remove -O1, -O2 etc.
95 _filter-var() {
96 local f x VAR VAL
97 declare -a new
98
99 VAR=$1
100 shift
101 eval VAL=\${${VAR}}
102 for f in ${VAL}; do
103 for x in "$@"; do
104 # Note this should work with globs like -O*
105 [[ ${f} == ${x} ]] && continue 2
106 done
107 eval new\[\${\#new\[@]}]=\${f}
108 done
109 eval export ${VAR}=\${new\[*]}
110 }
111
112 # @FUNCTION: filter-flags
113 # @USAGE: <flags>
114 # @DESCRIPTION:
115 # Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
116 filter-flags() {
117 _filter-hardened "$@"
118 _filter-var CFLAGS "$@"
119 _filter-var CPPFLAGS "$@"
120 _filter-var CXXFLAGS "$@"
121 _filter-var FFLAGS "$@"
122 _filter-var FCFLAGS "$@"
123 return 0
124 }
125
126 # @FUNCTION: filter-lfs-flags
127 # @DESCRIPTION:
128 # Remove flags that enable Large File Support.
129 filter-lfs-flags() {
130 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
131 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
132 }
133
134 # @FUNCTION: append-cppflags
135 # @USAGE: <flags>
136 # @DESCRIPTION:
137 # Add extra <flags> to the current CPPFLAGS.
138 append-cppflags() {
139 [[ -z $* ]] && return 0
140 export CPPFLAGS="${CPPFLAGS} $*"
141 return 0
142 }
143
144 # @FUNCTION: append-cflags
145 # @USAGE: <flags>
146 # @DESCRIPTION:
147 # Add extra <flags> to the current CFLAGS.
148 append-cflags() {
149 [[ -z $* ]] && return 0
150 export CFLAGS="${CFLAGS} $*"
151 return 0
152 }
153
154 # @FUNCTION: append-cxxflags
155 # @USAGE: <flags>
156 # @DESCRIPTION:
157 # Add extra <flags> to the current CXXFLAGS.
158 append-cxxflags() {
159 [[ -z $* ]] && return 0
160 export CXXFLAGS="${CXXFLAGS} $*"
161 return 0
162 }
163
164 # @FUNCTION: append-fflags
165 # @USAGE: <flags>
166 # @DESCRIPTION:
167 # Add extra <flags> to the current {F,FC}FLAGS.
168 append-fflags() {
169 [[ -z $* ]] && return 0
170 export FFLAGS="${FFLAGS} $*"
171 export FCFLAGS="${FCFLAGS} $*"
172 return 0
173 }
174
175 # @FUNCTION: append-lfs-flags
176 # @DESCRIPTION:
177 # Add flags that enable Large File Support.
178 append-lfs-flags() {
179 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
180 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
181 }
182
183 # @FUNCTION: append-flags
184 # @USAGE: <flags>
185 # @DESCRIPTION:
186 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
187 append-flags() {
188 [[ -z $* ]] && return 0
189 append-cflags "$@"
190 append-cxxflags "$@"
191 append-fflags "$@"
192 return 0
193 }
194
195 # @FUNCTION: replace-flags
196 # @USAGE: <old> <new>
197 # @DESCRIPTION:
198 # Replace the <old> flag with <new>. Accepts shell globs for <old>.
199 replace-flags() {
200 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
202 && die "replace-flags takes 2 arguments, not $#"
203
204 local f fset
205 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
206
207 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
208 # Looping over the flags instead of using a global
209 # substitution ensures that we're working with flag atoms.
210 # Otherwise globs like -O* have the potential to wipe out the
211 # list of flags.
212 for f in ${!fset}; do
213 # Note this should work with globs like -O*
214 [[ ${f} == ${1} ]] && f=${2}
215 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
216 done
217 eval export ${fset}=\${new_${fset}\[*]}
218 done
219
220 return 0
221 }
222
223 # @FUNCTION: replace-cpu-flags
224 # @USAGE: <old> <new>
225 # @DESCRIPTION:
226 # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
227 # with flags that select the <new> cpu. Accepts shell globs for <old>.
228 replace-cpu-flags() {
229 local newcpu="$#" ; newcpu="${!newcpu}"
230 while [ $# -gt 1 ] ; do
231 # quote to make sure that no globbing is done (particularly on
232 # ${oldcpu}) prior to calling replace-flags
233 replace-flags "-march=${1}" "-march=${newcpu}"
234 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
235 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
236 shift
237 done
238 return 0
239 }
240
241 _is_flagq() {
242 local x
243 for x in ${!1} ; do
244 [[ ${x} == $2 ]] && return 0
245 done
246 return 1
247 }
248
249 # @FUNCTION: is-flagq
250 # @USAGE: <flag>
251 # @DESCRIPTION:
252 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
253 is-flagq() {
254 [[ -n $2 ]] && die "Usage: is-flag <flag>"
255 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
256 }
257
258 # @FUNCTION: is-flag
259 # @USAGE: <flag>
260 # @DESCRIPTION:
261 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
262 is-flag() {
263 is-flagq "$@" && echo true
264 }
265
266 # @FUNCTION: is-ldflagq
267 # @USAGE: <flag>
268 # @DESCRIPTION:
269 # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
270 is-ldflagq() {
271 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
272 _is_flagq LDFLAGS $1
273 }
274
275 # @FUNCTION: is-ldflag
276 # @USAGE: <flag>
277 # @DESCRIPTION:
278 # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
279 is-ldflag() {
280 is-ldflagq "$@" && echo true
281 }
282
283 # @FUNCTION: filter-mfpmath
284 # @USAGE: <math types>
285 # @DESCRIPTION:
286 # Remove specified math types from the fpmath flag. For example, if the user
287 # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
288 # -mfpmath=386.
289 filter-mfpmath() {
290 local orig_mfpmath new_math prune_math
291
292 # save the original -mfpmath flag
293 orig_mfpmath=$(get-flag -mfpmath)
294 # get the value of the current -mfpmath flag
295 new_math=$(get-flag mfpmath)
296 new_math=" ${new_math//,/ } "
297 # figure out which math values are to be removed
298 prune_math=""
299 for prune_math in "$@" ; do
300 new_math=${new_math/ ${prune_math} / }
301 done
302 new_math=$(echo ${new_math})
303 new_math=${new_math// /,}
304
305 if [[ -z ${new_math} ]] ; then
306 # if we're removing all user specified math values are
307 # slated for removal, then we just filter the flag
308 filter-flags ${orig_mfpmath}
309 else
310 # if we only want to filter some of the user specified
311 # math values, then we replace the current flag
312 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
313 fi
314 return 0
315 }
316
317 # @FUNCTION: strip-flags
318 # @DESCRIPTION:
319 # Strip C[XX]FLAGS of everything except known good/safe flags.
320 strip-flags() {
321 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
322
323 setup-allowed-flags
324
325 local NEW_CFLAGS=""
326 local NEW_CXXFLAGS=""
327 local NEW_FFLAGS=""
328 local NEW_FCFLAGS=""
329
330 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
331 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
332 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
333 fi
334
335 set -f # disable pathname expansion
336
337 for x in ${CFLAGS}; do
338 for y in ${ALLOWED_FLAGS}; do
339 flag=${x%%=*}
340 if [ "${flag%%${y}}" = "" ] ; then
341 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
342 break
343 fi
344 done
345 done
346
347 for x in ${CXXFLAGS}; do
348 for y in ${ALLOWED_FLAGS}; do
349 flag=${x%%=*}
350 if [ "${flag%%${y}}" = "" ] ; then
351 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
352 break
353 fi
354 done
355 done
356
357 for x in ${FFLAGS}; do
358 for y in ${ALLOWED_FLAGS}; do
359 flag=${x%%=*}
360 if [ "${flag%%${y}}" = "" ] ; then
361 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
362 break
363 fi
364 done
365 done
366
367 for x in ${FCFLAGS}; do
368 for y in ${ALLOWED_FLAGS}; do
369 flag=${x%%=*}
370 if [ "${flag%%${y}}" = "" ] ; then
371 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
372 break
373 fi
374 done
375 done
376
377 # In case we filtered out all optimization flags fallback to -O2
378 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
379 NEW_CFLAGS="${NEW_CFLAGS} -O2"
380 fi
381 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
382 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
383 fi
384 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
385 NEW_FFLAGS="${NEW_FFLAGS} -O2"
386 fi
387 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
388 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
389 fi
390
391 set +f # re-enable pathname expansion
392
393 export CFLAGS="${NEW_CFLAGS}"
394 export CXXFLAGS="${NEW_CXXFLAGS}"
395 export FFLAGS="${NEW_FFLAGS}"
396 export FCFLAGS="${NEW_FCFLAGS}"
397 return 0
398 }
399
400 test-flag-PROG() {
401 local comp=$1
402 local flags="$2"
403
404 [[ -z ${comp} || -z ${flags} ]] && \
405 return 1
406
407 local PROG=$(tc-get${comp})
408 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
409 > /dev/null 2>&1
410 }
411
412 # @FUNCTION: test-flag-CC
413 # @USAGE: <flag>
414 # @DESCRIPTION:
415 # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
416 test-flag-CC() { test-flag-PROG "CC" "$1"; }
417
418 # @FUNCTION: test-flag-CXX
419 # @USAGE: <flag>
420 # @DESCRIPTION:
421 # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
422 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
423
424 # @FUNCTION: test-flag-F77
425 # @USAGE: <flag>
426 # @DESCRIPTION:
427 # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
428 test-flag-F77() { test-flag-PROG "F77" "$1"; }
429
430 # @FUNCTION: test-flag-FC
431 # @USAGE: <flag>
432 # @DESCRIPTION:
433 # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
434 test-flag-FC() { test-flag-PROG "FC" "$1"; }
435
436 test-flags-PROG() {
437 local comp=$1
438 local flags
439 local x
440
441 shift
442
443 [[ -z ${comp} ]] && return 1
444
445 x=""
446 for x in "$@" ; do
447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
448 done
449
450 echo "${flags}"
451
452 # Just bail if we dont have any flags
453 [[ -n ${flags} ]]
454 }
455
456 # @FUNCTION: test-flags-CC
457 # @USAGE: <flags>
458 # @DESCRIPTION:
459 # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
460 test-flags-CC() { test-flags-PROG "CC" "$@"; }
461
462 # @FUNCTION: test-flags-CXX
463 # @USAGE: <flags>
464 # @DESCRIPTION:
465 # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
466 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
467
468 # @FUNCTION: test-flags-F77
469 # @USAGE: <flags>
470 # @DESCRIPTION:
471 # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
472 test-flags-F77() { test-flags-PROG "F77" "$@"; }
473
474 # @FUNCTION: test-flags-FC
475 # @USAGE: <flags>
476 # @DESCRIPTION:
477 # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
478 test-flags-FC() { test-flags-PROG "FC" "$@"; }
479
480 # @FUNCTION: test-flags
481 # @USAGE: <flags>
482 # @DESCRIPTION:
483 # Short-hand that should hopefully work for both C and C++ compiler, but
484 # its really only present due to the append-flags() abomination.
485 test-flags() { test-flags-CC "$@"; }
486
487 # @FUNCTION: test_flag
488 # @DESCRIPTION:
489 # DEPRICIATED, use test-flags()
490 test_flag() {
491 ewarn "test_flag: deprecated, please use test-flags()!" >&2
492
493 test-flags-CC "$@"
494 }
495
496 # @FUNCTION: test_version_info
497 # @USAGE: <version>
498 # @DESCRIPTION:
499 # Returns shell true if the current C compiler version matches <version>, else returns shell false.
500 # Accepts shell globs.
501 test_version_info() {
502 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
503 return 0
504 else
505 return 1
506 fi
507 }
508
509 # @FUNCTION: strip-unsupported-flags
510 # @DESCRIPTION:
511 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
512 strip-unsupported-flags() {
513 export CFLAGS=$(test-flags-CC ${CFLAGS})
514 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
515 export FFLAGS=$(test-flags-F77 ${FFLAGS})
516 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
517 }
518
519 # @FUNCTION: get-flag
520 # @USAGE: <flag>
521 # @DESCRIPTION:
522 # Find and echo the value for a particular flag. Accepts shell globs.
523 get-flag() {
524 local f findflag="$1"
525
526 # this code looks a little flaky but seems to work for
527 # everything we want ...
528 # for example, if CFLAGS="-march=i686":
529 # `get-flag -march` == "-march=i686"
530 # `get-flag march` == "i686"
531 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
532 if [ "${f/${findflag}}" != "${f}" ] ; then
533 printf "%s\n" "${f/-${findflag}=}"
534 return 0
535 fi
536 done
537 return 1
538 }
539
540 # @FUNCTION: has_hardened
541 # @DESCRIPTION:
542 # DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
543 has_hardened() {
544 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
545
546 test_version_info Hardened && return 0
547 # The specs file wont exist unless gcc has GCC_SPECS support
548 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
549 }
550
551 # @FUNCTION: has_pic
552 # @DESCRIPTION:
553 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
554 # indicate whether PIC is set
555 has_pic() {
556 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
557
558 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
559 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
560 gcc-specs-pie
561 }
562
563 # @FUNCTION: has_pie
564 # @DESCRIPTION:
565 # DEPRECATED - use gcc-specs-pie from toolchain-funcs
566 # indicate whether PIE is set
567 has_pie() {
568 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
569
570 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
571 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
572 gcc-specs-pie
573 }
574
575 # @FUNCTION: has_ssp_all
576 # @DESCRIPTION:
577 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
578 # indicate whether code for SSP is being generated for all functions
579 has_ssp_all() {
580 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
581
582 # note; this matches only -fstack-protector-all
583 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
584 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
585 gcc-specs-ssp-to-all
586 }
587
588 # @FUNCTION: has_ssp
589 # @DESCRIPTION:
590 # DEPRECATED - use gcc-specs-ssp from toolchain-funcs
591 # indicate whether code for SSP is being generated
592 has_ssp() {
593 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
594
595 # note; this matches both -fstack-protector and -fstack-protector-all
596 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
597 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
598 gcc-specs-ssp
599 }
600
601 # @FUNCTION: has_m64
602 # @DESCRIPTION:
603 # This doesn't test if the flag is accepted, it tests if the flag actually
604 # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
605 # return code is 0, else the return code is 1.
606 has_m64() {
607 # this doesnt test if the flag is accepted, it tests if the flag
608 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
609 # please dont replace this function with test_flag in some future
610 # clean-up!
611
612 local temp="$(emktemp)"
613 echo "int main() { return(0); }" > "${temp}".c
614 MY_CC=$(tc-getCC)
615 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
616 local ret=$?
617 rm -f "${temp}".c
618 [[ ${ret} != 1 ]] && return 0
619 return 1
620 }
621
622 # @FUNCTION: has_m32
623 # @DESCRIPTION:
624 # This doesn't test if the flag is accepted, it tests if the flag actually
625 # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
626 # code is 0, else return code is 1.
627 has_m32() {
628 # this doesnt test if the flag is accepted, it tests if the flag
629 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
630 # please dont replace this function with test_flag in some future
631 # clean-up!
632
633 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
634
635 local temp=$(emktemp)
636 echo "int main() { return(0); }" > "${temp}".c
637 MY_CC=$(tc-getCC)
638 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
639 local ret=$?
640 rm -f "${temp}".c
641 [[ ${ret} != 1 ]] && return 0
642 return 1
643 }
644
645 # @FUNCTION: replace-sparc64-flags
646 # @DESCRIPTION:
647 # Sets mcpu to v8 and uses the original value as mtune if none specified.
648 replace-sparc64-flags() {
649 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
650
651 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
652 for x in ${SPARC64_CPUS}; do
653 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
654 done
655 else
656 for x in ${SPARC64_CPUS}; do
657 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
658 done
659 fi
660
661 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
662 for x in ${SPARC64_CPUS}; do
663 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
664 done
665 else
666 for x in ${SPARC64_CPUS}; do
667 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
668 done
669 fi
670
671 export CFLAGS CXXFLAGS
672 }
673
674 # @FUNCTION: append-libs
675 # @USAGE: <libs>
676 # @DESCRIPTION:
677 # Add extra <libs> to the current LIBS.
678 append-libs() {
679 [[ -z $* ]] && return 0
680 local flag
681 for flag in "$@"; do
682 [[ ${flag} == -l* ]] && flag=${flag#-l}
683 export LIBS="${LIBS} -l${flag}"
684 done
685
686 return 0
687 }
688
689 # @FUNCTION: append-ldflags
690 # @USAGE: <flags>
691 # @DESCRIPTION:
692 # Add extra <flags> to the current LDFLAGS.
693 append-ldflags() {
694 [[ -z $* ]] && return 0
695 local flag
696 for flag in "$@"; do
697 [[ ${flag} == -l* ]] && \
698 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
699 done
700
701 export LDFLAGS="${LDFLAGS} $*"
702 return 0
703 }
704
705 # @FUNCTION: filter-ldflags
706 # @USAGE: <flags>
707 # @DESCRIPTION:
708 # Remove particular <flags> from LDFLAGS. Accepts shell globs.
709 filter-ldflags() {
710 _filter-var LDFLAGS "$@"
711 return 0
712 }
713
714 # @FUNCTION: raw-ldflags
715 # @USAGE: <flags>
716 # @DESCRIPTION:
717 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
718 # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
719 # to gcc where it needs the '-Wl,'.
720 raw-ldflags() {
721 local x input="$@"
722 [[ -z ${input} ]] && input=${LDFLAGS}
723 set --
724 for x in ${input} ; do
725 x=${x#-Wl,}
726 set -- "$@" ${x//,/ }
727 done
728 echo "$@"
729 }
730
731 # @FUNCTION: no-as-needed
732 # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
733 no-as-needed() {
734 case $($(tc-getLD) -v 2>&1 </dev/null) in
735 *GNU*) # GNU ld
736 echo "-Wl,--no-as-needed" ;;
737 esac
738 }
739
740 # Some tests for when we screw with things and want to make
741 # sure we didn't break anything
742 #TESTS() {
743 # CFLAGS="-a -b -c=1"
744 # CXXFLAGS="-x -y -z=2"
745 # LDFLAGS="-l -m -n=3"
746 #
747 # die() { exit 1; }
748 # (is-flag 1 2 3) && die
749 # (is-ldflag 1 2 3) && die
750 #
751 # is-flagq -l && die
752 # is-ldflagq -a && die
753 # is-flagq -a || die
754 # is-flagq -x || die
755 # is-ldflagq -n=* || die
756 # is-ldflagq -n && die
757 #
758 # strip-unsupported-flags
759 # [[ ${CFLAGS} == "-c=1" ]] || die
760 # [[ ${CXXFLAGS} == "-y -z=2" ]] || die
761 #
762 # echo "All tests pass"
763 #}
764 #TESTS

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