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Revision 1.25 Revision 1.173
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2012 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# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.25 2003/08/20 04:11:27 agriffis Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.173 2012/05/31 00:29:06 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
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# Return all the flag variables that our high level funcs operate on.
19all-flag-vars() {
20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
21}
22
23# {C,CXX,F,FC}FLAGS that we allow in strip-flags
24# Note: shell globs and character lists are allowed
25setup-allowed-flags() {
26 ALLOWED_FLAGS="-pipe"
27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
33 ALLOWED_FLAGS+=" -W* -w"
34
35 # allow a bunch of flags that negate features / control ABI
36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
49
50 # 4.5
51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
52 # 4.6
53 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
54
55 export ALLOWED_FLAGS
56 return 0
57}
58
59# inverted filters for hardened compiler. This is trying to unpick
60# the hardened compiler defaults.
61_filter-hardened() {
62 local f
63 for f in "$@" ; do
64 case "${f}" in
65 # Ideally we should only concern ourselves with PIE flags,
66 # not -fPIC or -fpic, but too many places filter -fPIC without
67 # thinking about -fPIE.
68 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
69 gcc-specs-pie || continue
70 is-flagq -nopie || append-flags -nopie;;
71 -fstack-protector)
72 gcc-specs-ssp || continue
73 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
74 -fstack-protector-all)
75 gcc-specs-ssp-to-all || continue
76 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
77 -fno-strict-overflow)
78 gcc-specs-nostrict || continue
79 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
80 esac
81 done
82}
83
84# Remove occurrences of strings from variable given in $1
85# Strings removed are matched as globs, so for example
86# '-O*' would remove -O1, -O2 etc.
87_filter-var() {
88 local f x var=$1 new=()
89 shift
90
91 for f in ${!var} ; do
92 for x in "$@" ; do
93 # Note this should work with globs like -O*
94 [[ ${f} == ${x} ]] && continue 2
95 done
96 new+=( "${f}" )
97 done
98 eval export ${var}=\""${new[*]}"\"
99}
100
101# @FUNCTION: filter-flags
102# @USAGE: <flags>
103# @DESCRIPTION:
104# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
105filter-flags() {
106 _filter-hardened "$@"
107 local v
108 for v in $(all-flag-vars) ; do
109 _filter-var ${v} "$@"
110 done
111 return 0
112}
113
114# @FUNCTION: filter-lfs-flags
115# @DESCRIPTION:
116# Remove flags that enable Large File Support.
117filter-lfs-flags() {
118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
124}
125
126# @FUNCTION: filter-ldflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Remove particular <flags> from LDFLAGS. Accepts shell globs.
130filter-ldflags() {
131 _filter-var LDFLAGS "$@"
132 return 0
133}
134
135# @FUNCTION: append-cppflags
136# @USAGE: <flags>
137# @DESCRIPTION:
138# Add extra <flags> to the current CPPFLAGS.
139append-cppflags() {
140 [[ $# -eq 0 ]] && return 0
141 export CPPFLAGS="${CPPFLAGS} $*"
142 return 0
143}
144
145# @FUNCTION: append-cflags
146# @USAGE: <flags>
147# @DESCRIPTION:
148# Add extra <flags> to the current CFLAGS.
149append-cflags() {
150 [[ $# -eq 0 ]] && return 0
151 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
152 return 0
153}
154
155# @FUNCTION: append-cxxflags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to the current CXXFLAGS.
159append-cxxflags() {
160 [[ $# -eq 0 ]] && return 0
161 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
162 return 0
163}
164
165# @FUNCTION: append-fflags
166# @USAGE: <flags>
167# @DESCRIPTION:
168# Add extra <flags> to the current {F,FC}FLAGS.
169append-fflags() {
170 [[ $# -eq 0 ]] && return 0
171 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
172 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
173 return 0
174}
175
176# @FUNCTION: append-lfs-flags
177# @DESCRIPTION:
178# Add flags that enable Large File Support.
179append-lfs-flags() {
180 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
181 # see comments in filter-lfs-flags func for meaning of these
182 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
183}
184
185# @FUNCTION: append-ldflags
186# @USAGE: <flags>
187# @DESCRIPTION:
188# Add extra <flags> to the current LDFLAGS.
189append-ldflags() {
190 [[ $# -eq 0 ]] && return 0
191 local flag
192 for flag in "$@"; do
193 [[ ${flag} == -l* ]] && \
194 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
195 done
196
197 export LDFLAGS="${LDFLAGS} $*"
198 return 0
199}
200
201# @FUNCTION: append-flags
202# @USAGE: <flags>
203# @DESCRIPTION:
204# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
205append-flags() {
206 [[ $# -eq 0 ]] && return 0
207 case " $* " in
208 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
209 *' '-L*|\
210 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
211 esac
212 append-cflags "$@"
213 append-cxxflags "$@"
214 append-fflags "$@"
215 return 0
216}
217
218# @FUNCTION: replace-flags
219# @USAGE: <old> <new>
220# @DESCRIPTION:
221# Replace the <old> flag with <new>. Accepts shell globs for <old>.
222replace-flags() {
223 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
224
225 local f var new
226 for var in $(all-flag-vars) ; do
227 # Looping over the flags instead of using a global
228 # substitution ensures that we're working with flag atoms.
229 # Otherwise globs like -O* have the potential to wipe out the
230 # list of flags.
231 new=()
232 for f in ${!var} ; do
233 # Note this should work with globs like -O*
234 [[ ${f} == ${1} ]] && f=${2}
235 new+=( "${f}" )
236 done
237 eval export ${var}=\""${new[*]}"\"
238 done
239
240 return 0
241}
242
243# @FUNCTION: replace-cpu-flags
244# @USAGE: <old> <new>
245# @DESCRIPTION:
246# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
247# with flags that select the <new> cpu. Accepts shell globs for <old>.
248replace-cpu-flags() {
249 local newcpu="$#" ; newcpu="${!newcpu}"
250 while [ $# -gt 1 ] ; do
251 # quote to make sure that no globbing is done (particularly on
252 # ${oldcpu}) prior to calling replace-flags
253 replace-flags "-march=${1}" "-march=${newcpu}"
254 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
255 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
256 shift
257 done
258 return 0
259}
260
261_is_flagq() {
262 local x
263 for x in ${!1} ; do
264 [[ ${x} == $2 ]] && return 0
265 done
266 return 1
267}
268
269# @FUNCTION: is-flagq
270# @USAGE: <flag>
271# @DESCRIPTION:
272# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
273is-flagq() {
274 [[ -n $2 ]] && die "Usage: is-flag <flag>"
275
276 local var
277 for var in $(all-flag-vars) ; do
278 _is_flagq ${var} "$1" && return 0
279 done
280 return 1
281}
282
283# @FUNCTION: is-flag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
287is-flag() {
288 is-flagq "$@" && echo true
289}
290
291# @FUNCTION: is-ldflagq
292# @USAGE: <flag>
293# @DESCRIPTION:
294# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
295is-ldflagq() {
296 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
297 _is_flagq LDFLAGS $1
298}
299
300# @FUNCTION: is-ldflag
301# @USAGE: <flag>
302# @DESCRIPTION:
303# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
304is-ldflag() {
305 is-ldflagq "$@" && echo true
306}
307
308# @FUNCTION: filter-mfpmath
309# @USAGE: <math types>
310# @DESCRIPTION:
311# Remove specified math types from the fpmath flag. For example, if the user
312# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
313# -mfpmath=386.
314filter-mfpmath() {
315 local orig_mfpmath new_math prune_math
316
317 # save the original -mfpmath flag
318 orig_mfpmath=$(get-flag -mfpmath)
319 # get the value of the current -mfpmath flag
320 new_math=$(get-flag mfpmath)
321 new_math=" ${new_math//,/ } "
322 # figure out which math values are to be removed
323 prune_math=""
324 for prune_math in "$@" ; do
325 new_math=${new_math/ ${prune_math} / }
326 done
327 new_math=$(echo ${new_math})
328 new_math=${new_math// /,}
329
330 if [[ -z ${new_math} ]] ; then
331 # if we're removing all user specified math values are
332 # slated for removal, then we just filter the flag
333 filter-flags ${orig_mfpmath}
334 else
335 # if we only want to filter some of the user specified
336 # math values, then we replace the current flag
337 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
338 fi
339 return 0
340}
341
342# @FUNCTION: strip-flags
343# @DESCRIPTION:
344# Strip C[XX]FLAGS of everything except known good/safe flags.
345strip-flags() {
346 local x y var
347
348 setup-allowed-flags
349
350 set -f # disable pathname expansion
351
352 for var in $(all-flag-vars) ; do
353 local new=()
354
355 for x in ${!var} ; do
356 local flag=${x%%=*}
357 for y in ${ALLOWED_FLAGS} ; do
358 if [[ -z ${flag%%${y}} ]] ; then
359 new+=( "${x}" )
360 break
361 fi
362 done
363 done
364
365 # In case we filtered out all optimization flags fallback to -O2
366 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
367 new+=( -O2 )
368 fi
369
370 eval export ${var}=\""${new[*]}"\"
371 done
372
373 set +f # re-enable pathname expansion
374
375 return 0
376}
377
378test-flag-PROG() {
379 local comp=$1
380 local flag=$2
381
382 [[ -z ${comp} || -z ${flag} ]] && return 1
383
384 # use -c so we can test the assembler as well
385 local PROG=$(tc-get${comp})
386 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
387 > /dev/null 2>&1
388}
389
390# @FUNCTION: test-flag-CC
391# @USAGE: <flag>
392# @DESCRIPTION:
393# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
394test-flag-CC() { test-flag-PROG "CC" "$1"; }
395
396# @FUNCTION: test-flag-CXX
397# @USAGE: <flag>
398# @DESCRIPTION:
399# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
400test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
401
402# @FUNCTION: test-flag-F77
403# @USAGE: <flag>
404# @DESCRIPTION:
405# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
406test-flag-F77() { test-flag-PROG "F77" "$1"; }
407
408# @FUNCTION: test-flag-FC
409# @USAGE: <flag>
410# @DESCRIPTION:
411# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
412test-flag-FC() { test-flag-PROG "FC" "$1"; }
413
414test-flags-PROG() {
415 local comp=$1
416 local flags
417 local x
418
419 shift
420
421 [[ -z ${comp} ]] && return 1
422
423 for x in "$@" ; do
424 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
425 done
426
427 echo "${flags}"
428
429 # Just bail if we dont have any flags
430 [[ -n ${flags} ]]
431}
432
433# @FUNCTION: test-flags-CC
434# @USAGE: <flags>
435# @DESCRIPTION:
436# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
437test-flags-CC() { test-flags-PROG "CC" "$@"; }
438
439# @FUNCTION: test-flags-CXX
440# @USAGE: <flags>
441# @DESCRIPTION:
442# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
443test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
444
445# @FUNCTION: test-flags-F77
446# @USAGE: <flags>
447# @DESCRIPTION:
448# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
449test-flags-F77() { test-flags-PROG "F77" "$@"; }
450
451# @FUNCTION: test-flags-FC
452# @USAGE: <flags>
453# @DESCRIPTION:
454# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
455test-flags-FC() { test-flags-PROG "FC" "$@"; }
456
457# @FUNCTION: test-flags
458# @USAGE: <flags>
459# @DESCRIPTION:
460# Short-hand that should hopefully work for both C and C++ compiler, but
461# its really only present due to the append-flags() abomination.
462test-flags() { test-flags-CC "$@"; }
463
464# @FUNCTION: test_version_info
465# @USAGE: <version>
466# @DESCRIPTION:
467# Returns shell true if the current C compiler version matches <version>, else returns shell false.
468# Accepts shell globs.
469test_version_info() {
470 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
471 return 0
472 else
473 return 1
474 fi
475}
476
477# @FUNCTION: strip-unsupported-flags
478# @DESCRIPTION:
479# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
480strip-unsupported-flags() {
481 export CFLAGS=$(test-flags-CC ${CFLAGS})
482 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
483 export FFLAGS=$(test-flags-F77 ${FFLAGS})
484 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
485}
486
487# @FUNCTION: get-flag
488# @USAGE: <flag>
489# @DESCRIPTION:
490# Find and echo the value for a particular flag. Accepts shell globs.
491get-flag() {
492 local f var findflag="$1"
493
494 # this code looks a little flaky but seems to work for
495 # everything we want ...
496 # for example, if CFLAGS="-march=i686":
497 # `get-flag -march` == "-march=i686"
498 # `get-flag march` == "i686"
499 for var in $(all-flag-vars) ; do
500 for f in ${!var} ; do
501 if [ "${f/${findflag}}" != "${f}" ] ; then
502 printf "%s\n" "${f/-${findflag}=}"
503 return 0
504 fi
505 done
506 done
507 return 1
508}
509
510# @FUNCTION: has_m64
511# @DESCRIPTION:
512# This doesn't test if the flag is accepted, it tests if the flag actually
513# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
514# return code is 0, else the return code is 1.
515has_m64() {
516 eqawarn "${FUNCNAME}: don't use this anymore"
517
518 # this doesnt test if the flag is accepted, it tests if the flag
519 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
520 # please dont replace this function with test_flag in some future
521 # clean-up!
522
523 local temp="$(emktemp)"
524 echo "int main() { return(0); }" > "${temp}".c
525 MY_CC=$(tc-getCC)
526 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
527 local ret=$?
528 rm -f "${temp}".c
529 [[ ${ret} != 1 ]] && return 0
530 return 1
531}
532
533has_m32() {
534 die "${FUNCNAME}: don't use this anymore"
535}
536
537# @FUNCTION: replace-sparc64-flags
538# @DESCRIPTION:
539# Sets mcpu to v8 and uses the original value as mtune if none specified.
540replace-sparc64-flags() {
541 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
542
543 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
544 for x in ${SPARC64_CPUS}; do
545 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
546 done
547 else
548 for x in ${SPARC64_CPUS}; do
549 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
550 done
551 fi
552
553 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
554 for x in ${SPARC64_CPUS}; do
555 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
556 done
557 else
558 for x in ${SPARC64_CPUS}; do
559 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
560 done
561 fi
562
563 export CFLAGS CXXFLAGS
564}
565
566# @FUNCTION: append-libs
567# @USAGE: <libs>
568# @DESCRIPTION:
569# Add extra <libs> to the current LIBS.
570append-libs() {
571 [[ $# -eq 0 ]] && return 0
572 local flag
573 for flag in "$@"; do
574 [[ ${flag} == -l* ]] && flag=${flag#-l}
575 export LIBS="${LIBS} -l${flag}"
576 done
577
578 return 0
579}
580
581# @FUNCTION: raw-ldflags
582# @USAGE: [flags]
583# @DESCRIPTION:
584# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
585# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
586# to gcc where it needs the '-Wl,'.
4# 587#
5# Author Bart Verwilst <verwilst@gentoo.org> 588# If no flags are specified, then default to ${LDFLAGS}.
6 589raw-ldflags() {
7ECLASS=flag-o-matic 590 local x input="$@"
8INHERITED="$INHERITED $ECLASS" 591 [[ -z ${input} ]] && input=${LDFLAGS}
9
10#
11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### is-flag <flag> ####
22# Returns "true" if flag is set in C[XX]FLAGS
23# Matches only complete a flag
24#
25#### strip-flags ####
26# Strip C[XX]FLAGS of everything except known
27# good options.
28#
29#### get-flag <flag> ####
30# Find and echo the value for a particular flag
31#
32#### replace-sparc64-flags ####
33# Sets mcpu to v8 and uses the original value
34# as mtune if none specified.
35#
36
37
38# C[XX]FLAGS that we allow in strip-flags
39ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
40case "${ARCH}" in
41 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
42 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
43 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
44esac
45
46# C[XX]FLAGS that we are think is ok, but needs testing
47# NOTE: currently -Os have issues with gcc3 and K6* arch's
48UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
49
50filter-mfpmath() {
51 for a in $CFLAGS; do
52 if [ "${a:0:8}" == "-mfpmath" ]; then
53 orig_mfpmath=$a
54 fi
55 done
56
57 mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
58 for b in $@; do
59 mfpmath="${mfpmath/$b}"
60 done
61
62 if [ -z "${mfpmath/ }" ]; then
63 filter-flags "$orig_mfpmath"
64 else
65 new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
66 replace-flags "$orig_mfpmath" "$new_mfpmath"
67 fi
68}
69
70filter-flags() {
71 # we do this fancy spacing stuff so as to not filter
72 # out part of a flag ... we want flag atoms ! :D
73 CFLAGS=" ${CFLAGS} "
74 CXXFLAGS=" ${CXXFLAGS} "
75 for x in $@ ; do
76 CFLAGS="${CFLAGS/ ${x} / }"
77 CXXFLAGS="${CXXFLAGS/ ${x} / }"
78 done
79 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
80 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
81}
82
83append-flags() {
84 CFLAGS="${CFLAGS} $@"
85 CXXFLAGS="${CXXFLAGS} $@"
86}
87
88replace-flags() {
89 CFLAGS="${CFLAGS/${1}/${2} }"
90 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
91}
92
93is-flag() {
94 for x in ${CFLAGS} ${CXXFLAGS} ; do
95 if [ "${x}" == "$1" ] ; then
96 echo true
97 return 0
98 fi
99 done
100 return 1
101}
102
103strip-flags() {
104 local NEW_CFLAGS=""
105 local NEW_CXXFLAGS=""
106
107 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
108 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
109 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
110 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
111 fi
112
113 set -f 592 set --
114 593 for x in ${input} ; do
115 for x in ${CFLAGS} 594 x=${x#-Wl,}
116 do 595 set -- "$@" ${x//,/ }
117 for y in ${ALLOWED_FLAGS}
118 do
119 flag=${x%%=*}
120 if [ "${flag%%${y}}" = "" ]
121 then
122 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
123 break
124 fi
125 done 596 done
126 done 597 echo "$@"
127
128 for x in ${CXXFLAGS}
129 do
130 for y in ${ALLOWED_FLAGS}
131 do
132 flag=${x%%=*}
133 if [ "${flag%%${y}}" = "" ]
134 then
135 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
136 break
137 fi
138 done
139 done
140
141 set +f
142
143 [ `use debug` ] \
144 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
145 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
146
147 export CFLAGS="${NEW_CFLAGS}"
148 export CXXFLAGS="${NEW_CXXFLAGS}"
149} 598}
150 599
151get-flag() { 600# @FUNCTION: no-as-needed
152 local findflag="$1" 601# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
153 602no-as-needed() {
154 for f in ${CFLAGS} ${CXXFLAGS} ; do 603 case $($(tc-getLD) -v 2>&1 </dev/null) in
155 if [ "${f/${findflag}}" != "${f}" ] ; then 604 *GNU*) # GNU ld
156 echo "${f/-${findflag}=}" 605 echo "-Wl,--no-as-needed" ;;
157 return 606 esac
158 fi
159 done
160} 607}
161 608
162replace-sparc64-flags() {
163 local SPARC64_CPUS="ultrasparc v9"
164
165 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
166 then
167 for x in ${SPARC64_CPUS}
168 do
169 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
170 done
171 else
172 for x in ${SPARC64_CPUS}
173 do
174 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
175 done
176 fi 609fi
177
178 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
179 then
180 for x in ${SPARC64_CPUS}
181 do
182 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
183 done
184 else
185 for x in ${SPARC64_CPUS}
186 do
187 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
188 done
189 fi
190}

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