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1# Copyright 1999-2002 Gentoo Technologies, Inc. 1# Copyright 1999-2011 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# Author Bart Verwilst <verwilst@gentoo.org> 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.164 2012/01/13 22:40:29 vapier Exp $
4# /space/gentoo/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass
5ECLASS=flag-o-matic
6 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
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
16inherit 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
7# 24#
8#### filter-flags <flag> #### 25# has_hardened
9# Remove particular flags from C[XX]FLAGS 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
34setup-allowed-flags() {
35 ALLOWED_FLAGS="-pipe"
36 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
37 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
38 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
39 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
40 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
41 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
42 ALLOWED_FLAGS+=" -W* -w"
43
44 # allow a bunch of flags that negate features / control ABI
45 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
46 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
47 -fno-omit-frame-pointer"
48 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
49 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
50 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
51 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
52 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
53 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
54 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
55 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
56 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
57 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
58
59 # 4.5
60 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
61 # 4.6
62 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
63
64 export ALLOWED_FLAGS
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,LD}FLAGS. Accepts shell globs.
117filter-flags() {
118 _filter-hardened "$@"
119 local v
120 for v in C CPP CXX F FC LD ; do
121 _filter-var ${v}FLAGS "$@"
122 done
123 return 0
124}
125
126# @FUNCTION: filter-lfs-flags
127# @DESCRIPTION:
128# Remove flags that enable Large File Support.
129filter-lfs-flags() {
130 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
131 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
132 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
133 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
134 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136}
137
138# @FUNCTION: append-cppflags
139# @USAGE: <flags>
140# @DESCRIPTION:
141# Add extra <flags> to the current CPPFLAGS.
142append-cppflags() {
143 [[ $# -eq 0 ]] && return 0
144 export CPPFLAGS="${CPPFLAGS} $*"
145 return 0
146}
147
148# @FUNCTION: append-cflags
149# @USAGE: <flags>
150# @DESCRIPTION:
151# Add extra <flags> to the current CFLAGS.
152append-cflags() {
153 [[ $# -eq 0 ]] && return 0
154 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
155 return 0
156}
157
158# @FUNCTION: append-cxxflags
159# @USAGE: <flags>
160# @DESCRIPTION:
161# Add extra <flags> to the current CXXFLAGS.
162append-cxxflags() {
163 [[ $# -eq 0 ]] && return 0
164 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
165 return 0
166}
167
168# @FUNCTION: append-fflags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to the current {F,FC}FLAGS.
172append-fflags() {
173 [[ $# -eq 0 ]] && return 0
174 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
175 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
176 return 0
177}
178
179# @FUNCTION: append-lfs-flags
180# @DESCRIPTION:
181# Add flags that enable Large File Support.
182append-lfs-flags() {
183 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
184 # see comments in filter-lfs-flags func for meaning of these
185 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
186}
187
188# @FUNCTION: append-flags
189# @USAGE: <flags>
190# @DESCRIPTION:
191# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
192append-flags() {
193 [[ $# -eq 0 ]] && return 0
194 append-cflags "$@"
195 append-cxxflags "$@"
196 append-fflags "$@"
197 return 0
198}
199
200# @FUNCTION: replace-flags
201# @USAGE: <old> <new>
202# @DESCRIPTION:
203# Replace the <old> flag with <new>. Accepts shell globs for <old>.
204replace-flags() {
205 [[ $# != 2 ]] \
206 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
207 && die "replace-flags takes 2 arguments, not $#"
208
209 local f fset
210 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
211
212 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
213 # Looping over the flags instead of using a global
214 # substitution ensures that we're working with flag atoms.
215 # Otherwise globs like -O* have the potential to wipe out the
216 # list of flags.
217 for f in ${!fset}; do
218 # Note this should work with globs like -O*
219 [[ ${f} == ${1} ]] && f=${2}
220 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
221 done
222 eval export ${fset}=\${new_${fset}\[*]}
223 done
224
225 return 0
226}
227
228# @FUNCTION: replace-cpu-flags
229# @USAGE: <old> <new>
230# @DESCRIPTION:
231# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
232# with flags that select the <new> cpu. Accepts shell globs for <old>.
233replace-cpu-flags() {
234 local newcpu="$#" ; newcpu="${!newcpu}"
235 while [ $# -gt 1 ] ; do
236 # quote to make sure that no globbing is done (particularly on
237 # ${oldcpu}) prior to calling replace-flags
238 replace-flags "-march=${1}" "-march=${newcpu}"
239 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
240 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
241 shift
242 done
243 return 0
244}
245
246_is_flagq() {
247 local x
248 for x in ${!1} ; do
249 [[ ${x} == $2 ]] && return 0
250 done
251 return 1
252}
253
254# @FUNCTION: is-flagq
255# @USAGE: <flag>
256# @DESCRIPTION:
257# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
258is-flagq() {
259 [[ -n $2 ]] && die "Usage: is-flag <flag>"
260 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
261}
262
263# @FUNCTION: is-flag
264# @USAGE: <flag>
265# @DESCRIPTION:
266# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
267is-flag() {
268 is-flagq "$@" && echo true
269}
270
271# @FUNCTION: is-ldflagq
272# @USAGE: <flag>
273# @DESCRIPTION:
274# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
275is-ldflagq() {
276 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
277 _is_flagq LDFLAGS $1
278}
279
280# @FUNCTION: is-ldflag
281# @USAGE: <flag>
282# @DESCRIPTION:
283# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
284is-ldflag() {
285 is-ldflagq "$@" && echo true
286}
287
288# @FUNCTION: filter-mfpmath
289# @USAGE: <math types>
290# @DESCRIPTION:
291# Remove specified math types from the fpmath flag. For example, if the user
292# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
293# -mfpmath=386.
294filter-mfpmath() {
295 local orig_mfpmath new_math prune_math
296
297 # save the original -mfpmath flag
298 orig_mfpmath=$(get-flag -mfpmath)
299 # get the value of the current -mfpmath flag
300 new_math=$(get-flag mfpmath)
301 new_math=" ${new_math//,/ } "
302 # figure out which math values are to be removed
303 prune_math=""
304 for prune_math in "$@" ; do
305 new_math=${new_math/ ${prune_math} / }
306 done
307 new_math=$(echo ${new_math})
308 new_math=${new_math// /,}
309
310 if [[ -z ${new_math} ]] ; then
311 # if we're removing all user specified math values are
312 # slated for removal, then we just filter the flag
313 filter-flags ${orig_mfpmath}
314 else
315 # if we only want to filter some of the user specified
316 # math values, then we replace the current flag
317 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
318 fi
319 return 0
320}
321
322# @FUNCTION: strip-flags
323# @DESCRIPTION:
324# Strip C[XX]FLAGS of everything except known good/safe flags.
325strip-flags() {
326 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
327
328 setup-allowed-flags
329
330 local NEW_CFLAGS=""
331 local NEW_CXXFLAGS=""
332 local NEW_FFLAGS=""
333 local NEW_FCFLAGS=""
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
400test-flag-PROG() {
401 local comp=$1
402 local flags="$2"
403
404 [[ -z ${comp} || -z ${flags} ]] && return 1
405
406 # use -c so we can test the assembler as well
407 local PROG=$(tc-get${comp})
408 ${PROG} ${flags} -c -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.
416test-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.
422test-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.
428test-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.
434test-flag-FC() { test-flag-PROG "FC" "$1"; }
435
436test-flags-PROG() {
437 local comp=$1
438 local flags
439 local x
440
441 shift
442
443 [[ -z ${comp} ]] && return 1
444
445 for x in "$@" ; do
446 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
447 done
448
449 echo "${flags}"
450
451 # Just bail if we dont have any flags
452 [[ -n ${flags} ]]
453}
454
455# @FUNCTION: test-flags-CC
456# @USAGE: <flags>
457# @DESCRIPTION:
458# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
459test-flags-CC() { test-flags-PROG "CC" "$@"; }
460
461# @FUNCTION: test-flags-CXX
462# @USAGE: <flags>
463# @DESCRIPTION:
464# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
465test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
466
467# @FUNCTION: test-flags-F77
468# @USAGE: <flags>
469# @DESCRIPTION:
470# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
471test-flags-F77() { test-flags-PROG "F77" "$@"; }
472
473# @FUNCTION: test-flags-FC
474# @USAGE: <flags>
475# @DESCRIPTION:
476# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
477test-flags-FC() { test-flags-PROG "FC" "$@"; }
478
479# @FUNCTION: test-flags
480# @USAGE: <flags>
481# @DESCRIPTION:
482# Short-hand that should hopefully work for both C and C++ compiler, but
483# its really only present due to the append-flags() abomination.
484test-flags() { test-flags-CC "$@"; }
485
486# @FUNCTION: test_version_info
487# @USAGE: <version>
488# @DESCRIPTION:
489# Returns shell true if the current C compiler version matches <version>, else returns shell false.
490# Accepts shell globs.
491test_version_info() {
492 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
493 return 0
494 else
495 return 1
496 fi
497}
498
499# @FUNCTION: strip-unsupported-flags
500# @DESCRIPTION:
501# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
502strip-unsupported-flags() {
503 export CFLAGS=$(test-flags-CC ${CFLAGS})
504 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
505 export FFLAGS=$(test-flags-F77 ${FFLAGS})
506 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
507}
508
509# @FUNCTION: get-flag
510# @USAGE: <flag>
511# @DESCRIPTION:
512# Find and echo the value for a particular flag. Accepts shell globs.
513get-flag() {
514 local f findflag="$1"
515
516 # this code looks a little flaky but seems to work for
517 # everything we want ...
518 # for example, if CFLAGS="-march=i686":
519 # `get-flag -march` == "-march=i686"
520 # `get-flag march` == "i686"
521 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
522 if [ "${f/${findflag}}" != "${f}" ] ; then
523 printf "%s\n" "${f/-${findflag}=}"
524 return 0
525 fi
526 done
527 return 1
528}
529
530# DEAD FUNCS. Remove by Dec 2011.
531test_flag() { die "$0: deprecated, please use test-flags()!" ; }
532has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
533has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
534has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
535has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
536has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
537
538# @FUNCTION: has_m64
539# @DESCRIPTION:
540# This doesn't test if the flag is accepted, it tests if the flag actually
541# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
542# return code is 0, else the return code is 1.
543has_m64() {
544 # this doesnt test if the flag is accepted, it tests if the flag
545 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
546 # please dont replace this function with test_flag in some future
547 # clean-up!
548
549 local temp="$(emktemp)"
550 echo "int main() { return(0); }" > "${temp}".c
551 MY_CC=$(tc-getCC)
552 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
553 local ret=$?
554 rm -f "${temp}".c
555 [[ ${ret} != 1 ]] && return 0
556 return 1
557}
558
559# @FUNCTION: has_m32
560# @DESCRIPTION:
561# This doesn't test if the flag is accepted, it tests if the flag actually
562# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
563# code is 0, else return code is 1.
564has_m32() {
565 # this doesnt test if the flag is accepted, it tests if the flag
566 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
567 # please dont replace this function with test_flag in some future
568 # clean-up!
569
570 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
571
572 local temp=$(emktemp)
573 echo "int main() { return(0); }" > "${temp}".c
574 MY_CC=$(tc-getCC)
575 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
576 local ret=$?
577 rm -f "${temp}".c
578 [[ ${ret} != 1 ]] && return 0
579 return 1
580}
581
582# @FUNCTION: replace-sparc64-flags
583# @DESCRIPTION:
584# Sets mcpu to v8 and uses the original value as mtune if none specified.
585replace-sparc64-flags() {
586 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
587
588 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
589 for x in ${SPARC64_CPUS}; do
590 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
591 done
592 else
593 for x in ${SPARC64_CPUS}; do
594 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
595 done
596 fi
597
598 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
599 for x in ${SPARC64_CPUS}; do
600 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
601 done
602 else
603 for x in ${SPARC64_CPUS}; do
604 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
605 done
606 fi
607
608 export CFLAGS CXXFLAGS
609}
610
611# @FUNCTION: append-libs
612# @USAGE: <libs>
613# @DESCRIPTION:
614# Add extra <libs> to the current LIBS.
615append-libs() {
616 [[ $# -eq 0 ]] && return 0
617 local flag
618 for flag in "$@"; do
619 [[ ${flag} == -l* ]] && flag=${flag#-l}
620 export LIBS="${LIBS} -l${flag}"
621 done
622
623 return 0
624}
625
626# @FUNCTION: append-ldflags
627# @USAGE: <flags>
628# @DESCRIPTION:
629# Add extra <flags> to the current LDFLAGS.
630append-ldflags() {
631 [[ $# -eq 0 ]] && return 0
632 local flag
633 for flag in "$@"; do
634 [[ ${flag} == -l* ]] && \
635 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
636 done
637
638 export LDFLAGS="${LDFLAGS} $*"
639 return 0
640}
641
642# @FUNCTION: filter-ldflags
643# @USAGE: <flags>
644# @DESCRIPTION:
645# Remove particular <flags> from LDFLAGS. Accepts shell globs.
646filter-ldflags() {
647 _filter-var LDFLAGS "$@"
648 return 0
649}
650
651# @FUNCTION: raw-ldflags
652# @USAGE: [flags]
653# @DESCRIPTION:
654# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
655# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
656# to gcc where it needs the '-Wl,'.
10# 657#
11#### append-flags <flag> #### 658# If no flags are specified, then default to ${LDFLAGS}.
12# Add extra flags to your current C[XX]FLAGS 659raw-ldflags() {
13# 660 local x input="$@"
14#### change-flags <orig.flag> <new.flag> ### 661 [[ -z ${input} ]] && input=${LDFLAGS}
15# Replace a flag by another one 662 set --
16#
17
18
19filter-flags () {
20
21 for x in $1; do 663 for x in ${input} ; do
22 CFLAGS="${CFLAGS/$x}" 664 x=${x#-Wl,}
23 CXXFLAGS="${CXXFLAGS/$x}" 665 set -- "$@" ${x//,/ }
24 done 666 done
25 667 echo "$@"
26} 668}
27 669
28append-flags () { 670# @FUNCTION: no-as-needed
29 671# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
30 672no-as-needed() {
31 CFLAGS="$CFLAGS $1" 673 case $($(tc-getLD) -v 2>&1 </dev/null) in
32 CXXFLAGS="$CXXFLAGS $1" 674 *GNU*) # GNU ld
33 675 echo "-Wl,--no-as-needed" ;;
676 esac
34} 677}
35 678
36change-flags () { 679fi
37
38 CFLAGS="${CFLAGS/${1}/${2}"
39 CXXFLAGS="${CXXFLAGS/${1}/${2}"
40
41}

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