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Revision 1.14 Revision 1.106
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2005 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 1.14 2003/03/25 07:07:42 lostlogic Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.106 2006/02/19 23:18:30 vapier Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9 5
6# need access to emktemp()
7inherit eutils toolchain-funcs multilib
8
10# 9#
11#### filter-flags <flag> #### 10#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS 11# Remove particular flags from C[XX]FLAGS
12# Matches only complete flags
13# 13#
14#### append-flags <flag> #### 14#### append-flags <flags> ####
15# Add extra flags to your current C[XX]FLAGS 15# Add extra flags to your current C[XX]FLAGS
16# 16#
17#### replace-flags <orig.flag> <new.flag> ### 17#### replace-flags <orig.flag> <new.flag> ###
18# Replace a flag by another one 18# Replace a flag by another one
19# 19#
20#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu>
23#
20#### is-flag <flag> #### 24#### is-flag[q] <flag> ####
21# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
22# Matches only complete flag 26# Matches only complete a flag
27# q version sets return code but doesn't echo
28#
29#### is-ldflag[q] <flag> ####
30# Returns "true" if flag is set in LDFLAGS
31# Matches only complete a flag
32# q version sets return code but doesn't echo
23# 33#
24#### strip-flags #### 34#### strip-flags ####
25# Strip C[XX]FLAGS of everything except known 35# Strip C[XX]FLAGS of everything except known
26# good options. 36# good options.
27# 37#
38#### strip-unsupported-flags ####
39# Strip C[XX]FLAGS of any flags not supported by
40# installed version of gcc
41#
28#### get-flag <flag> #### 42#### get-flag <flag> ####
29# Find and echo the value for a particular flag 43# Find and echo the value for a particular flag
30# 44#
45#### replace-sparc64-flags ####
46# Sets mcpu to v8 and uses the original value
47# as mtune if none specified.
48#
49#### filter-mfpmath <math types> ####
50# Remove specified math types from the fpmath specification
51# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52# will leave the user with -mfpmath=386
53#
54#### append-ldflags ####
55# Add extra flags to your current LDFLAGS
56#
57#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS
59# Matches only complete flags
60#
61#### bindnow-flags ####
62# Returns the flags to enable "now" binding in the current selected linker.
63#
64################ DEPRECATED functions ################
65# The following are still present to avoid breaking existing
66# code more than necessary; however they are deprecated. Please
67# use gcc-specs-* from toolchain-funcs.eclass instead, if you
68# need to know which hardened techs are active in the compiler.
69# See bug #100974
70#
71#### has_hardened ####
72# Returns true if the compiler has 'Hardened' in its version string,
73# (note; switched-spec vanilla compilers satisfy this condition) or
74# the specs file name contains 'hardened'.
75#
76#### has_pie ####
77# Returns true if the compiler by default or with current CFLAGS
78# builds position-independent code.
79#
80#### has_pic ####
81# Returns true if the compiler by default or with current CFLAGS
82# builds position-independent code.
83#
84#### has_ssp_all ####
85# Returns true if the compiler by default or with current CFLAGS
86# generates stack smash protections for all functions
87#
88#### has_ssp ####
89# Returns true if the compiler by default or with current CFLAGS
90# generates stack smash protections for most vulnerable functions
91#
31 92
32ALLOWED_FLAGS="-O -mcpu -march -pipe -g" 93# C[XX]FLAGS that we allow in strip-flags
94setup-allowed-flags() {
95 if [[ -z ${ALLOWED_FLAGS} ]] ; then
96 export ALLOWED_FLAGS="-pipe"
97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
102 fi
103 # allow a bunch of flags that negate features / control ABI
104 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
106 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
107 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
108 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
109 -mieee -mieee-with-inexact \
110 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
111 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
112 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
113 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
33 114
115 # C[XX]FLAGS that we are think is ok, but needs testing
116 # NOTE: currently -Os have issues with gcc3 and K6* arch's
117 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
118 return 0
119}
34 120
121# inverted filters for hardened compiler. This is trying to unpick
122# the hardened compiler defaults.
123_filter-hardened() {
124 local f
125 for f in "$@" ; do
126 case "${f}" in
127 # Ideally we should only concern ourselves with PIE flags,
128 # not -fPIC or -fpic, but too many places filter -fPIC without
129 # thinking about -fPIE.
130 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
131 gcc-specs-pie || continue
132 is-flagq -nopie || append-flags -nopie;;
133 -fstack-protector)
134 gcc-specs-ssp || continue
135 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
136 -fstack-protector-all)
137 gcc-specs-ssp-to-all || continue
138 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
139 esac
140 done
141}
142
143# Remove occurrences of strings from variable given in $1
144# Strings removed are matched as globs, so for example
145# '-O*' would remove -O1, -O2 etc.
146_filter-var() {
147 local f x VAR VAL
148 declare -a new
149
150 VAR=$1
151 shift
152 eval VAL=\${${VAR}}
153 for f in ${VAL}; do
154 for x in "$@"; do
155 # Note this should work with globs like -O*
156 [[ ${f} == ${x} ]] && continue 2
157 done
158 eval new\[\${\#new\[@]}]=\${f}
159 done
160 eval export ${VAR}=\${new\[*]}
161}
162
35filter-flags () { 163filter-flags() {
36 164 _filter-hardened "$@"
37 for x in $1 165 _filter-var CFLAGS "$@"
38 do 166 _filter-var CXXFLAGS "$@"
39 export CFLAGS="${CFLAGS/${x}}" 167 return 0
40 export CXXFLAGS="${CXXFLAGS/${x}}"
41 done
42
43} 168}
44 169
170filter-lfs-flags() {
171 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
172 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
173}
174
175append-lfs-flags() {
176 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
177 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
178}
179
45append-flags () { 180append-flags() {
46 181 [[ -z $* ]] && return 0
47 CFLAGS="${CFLAGS} $1" 182 export CFLAGS="${CFLAGS} $*"
48 CXXFLAGS="${CXXFLAGS} $1" 183 export CXXFLAGS="${CXXFLAGS} $*"
49 184 return 0
50} 185}
51 186
52replace-flags () { 187replace-flags() {
188 [[ $# != 2 ]] \
189 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
190 && die "replace-flags takes 2 arguments, not $#"
53 191
54 CFLAGS="${CFLAGS/${1}/${2} }" 192 local f fset
55 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 193 declare -a new_CFLAGS new_CXXFLAGS
56 194
195 for fset in CFLAGS CXXFLAGS; do
196 # Looping over the flags instead of using a global
197 # substitution ensures that we're working with flag atoms.
198 # Otherwise globs like -O* have the potential to wipe out the
199 # list of flags.
200 for f in ${!fset}; do
201 # Note this should work with globs like -O*
202 [[ ${f} == ${1} ]] && f=${2}
203 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
204 done
205 eval export ${fset}=\${new_${fset}\[*]}
206 done
207
208 return 0
209}
210
211replace-cpu-flags() {
212 local newcpu="$#" ; newcpu="${!newcpu}"
213 while [ $# -gt 1 ] ; do
214 # quote to make sure that no globbing is done (particularly on
215 # ${oldcpu} prior to calling replace-flags
216 replace-flags "-march=${1}" "-march=${newcpu}"
217 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
218 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
219 shift
220 done
221 return 0
222}
223
224is-flagq() {
225 local x
226
227 for x in ${CFLAGS} ${CXXFLAGS} ; do
228 # Note this should work with globs like -mcpu=ultrasparc*
229 if [[ ${x} == ${1} ]]; then
230 return 0
231 fi
232 done
233 return 1
57} 234}
58 235
59is-flag() { 236is-flag() {
60 237 if is-flagq ${1}; then
61 for x in ${CFLAGS} ${CXXFLAGS}
62 do
63 if [ "${x}" = "$1" ]
64 then
65 echo true 238 echo true
66 break 239 return 0
67 fi 240 fi
68 done 241 return 1
242}
69 243
244is-ldflagq() {
245 local x
246
247 for x in ${LDFLAGS} ; do
248 # Note this should work with globs like -mcpu=ultrasparc*
249 if [[ ${x} == ${1} ]]; then
250 return 0
251 fi
252 done
253 return 1
254}
255
256is-ldflag() {
257 if is-ldflagq ${1}; then
258 echo true
259 return 0
260 fi
261 return 1
262}
263
264filter-mfpmath() {
265 local orig_mfpmath new_math prune_math
266
267 # save the original -mfpmath flag
268 orig_mfpmath="`get-flag -mfpmath`"
269 # get the value of the current -mfpmath flag
270 new_math=" `get-flag mfpmath | tr , ' '` "
271 # figure out which math values are to be removed
272 prune_math=""
273 for prune_math in "$@" ; do
274 new_math="${new_math/ ${prune_math} / }"
275 done
276 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
277
278 if [ -z "${new_math}" ] ; then
279 # if we're removing all user specified math values are
280 # slated for removal, then we just filter the flag
281 filter-flags ${orig_mfpmath}
282 else
283 # if we only want to filter some of the user specified
284 # math values, then we replace the current flag
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
286 fi
287 return 0
70} 288}
71 289
72strip-flags() { 290strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS
292
293 setup-allowed-flags
73 294
74 local NEW_CFLAGS="" 295 local NEW_CFLAGS=""
75 local NEW_CXXFLAGS="" 296 local NEW_CXXFLAGS=""
76 297
77 set -f 298 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
301 fi
78 302
303 set -f # disable pathname expansion
304
79 for x in ${CFLAGS} 305 for x in ${CFLAGS}; do
80 do
81 for y in ${ALLOWED_FLAGS} 306 for y in ${ALLOWED_FLAGS}; do
82 do
83 flag=${x%%=*} 307 flag=${x%%=*}
84 if [ "${flag%%${y}}" = "" ] 308 if [ "${flag%%${y}}" = "" ] ; then
85 then
86 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 309 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
87 break 310 break
88 fi 311 fi
89 done 312 done
90 done 313 done
91 314
92 for x in ${CXXFLAGS} 315 for x in ${CXXFLAGS}; do
93 do
94 for y in ${ALLOWED_FLAGS} 316 for y in ${ALLOWED_FLAGS}; do
95 do
96 flag=${x%%=*} 317 flag=${x%%=*}
97 if [ "${flag%%${y}}" = "" ] 318 if [ "${flag%%${y}}" = "" ] ; then
98 then
99 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 319 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
100 break 320 break
101 fi 321 fi
102 done 322 done
103 done 323 done
104 324
105 set +f 325 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2"
328 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
331 fi
332
333 set +f # re-enable pathname expansion
106 334
107 export CFLAGS="${NEW_CFLAGS}" 335 export CFLAGS="${NEW_CFLAGS}"
108 export CXXFLAGS="${NEW_CXXFLAGS}" 336 export CXXFLAGS="${NEW_CXXFLAGS}"
337 return 0
338}
339
340test-flag-PROG() {
341 local comp=$1
342 local flags="$2"
343
344 [[ -z ${comp} || -z ${flags} ]] && \
345 return 1
346
347 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1
350}
351
352# Returns true if C compiler support given flag
353test-flag-CC() { test-flag-PROG "CC" "$1"; }
354
355# Returns true if C++ compiler support given flag
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
357
358test-flags-PROG() {
359 local comp=$1
360 local flags
361 local x
362
363 shift
364
365 [[ -z ${comp} ]] && \
366 return 1
367
368 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags} ${x}"
370 done
371
372 echo "${flags}"
373
374 # Just bail if we dont have any flags
375 [[ -n ${flags} ]]
376}
377
378# Returns (echo's) the given flags supported by the C compiler
379test-flags-CC() { test-flags-PROG "CC" "$@"; }
380
381# Returns (echo's) the given flags supported by the C++ compiler
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383
384# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; }
387
388# Depriciated, use test-flags()
389test_flag() {
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2
391
392 test-flags-CC "$@"
393}
394
395test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0
398 else
399 return 1
400 fi
401}
402
403strip-unsupported-flags() {
404 local x NEW_CFLAGS NEW_CXXFLAGS
405
406 for x in ${CFLAGS} ; do
407 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
408 done
409 for x in ${CXXFLAGS} ; do
410 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
411 done
412
413 export CFLAGS=${NEW_CFLAGS}
414 export CXXFLAGS=${NEW_CXXFLAGS}
109} 415}
110 416
111get-flag() { 417get-flag() {
112 local findflag="$1" 418 local f findflag="$1"
113 419
420 # this code looks a little flaky but seems to work for
421 # everything we want ...
422 # for example, if CFLAGS="-march=i686":
423 # `get-flag -march` == "-march=i686"
424 # `get-flag march` == "i686"
114 for f in ${CFLAGS} ${CXXFLAGS} ; do 425 for f in ${CFLAGS} ${CXXFLAGS} ; do
115 if [ "${f/${findflag}}" != "${f}" ] ; then 426 if [ "${f/${findflag}}" != "${f}" ] ; then
116 echo "${f/-${findflag}=}" 427 printf "%s\n" "${f/-${findflag}=}"
117 return 428 return 0
118 fi 429 fi
119 done 430 done
431 return 1
120} 432}
433
434# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
435has_hardened() {
436 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
437
438 test_version_info Hardened && return 0
439 # The specs file wont exist unless gcc has GCC_SPECS support
440 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
441}
442
443# DEPRECATED - use gcc-specs-pie from toolchain-funcs
444# indicate whether PIC is set
445has_pic() {
446 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
447
448 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
449 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
450 gcc-specs-pie
451}
452
453# DEPRECATED - use gcc-specs-pie from toolchain-funcs
454# indicate whether PIE is set
455has_pie() {
456 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
457
458 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
459 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
460 gcc-specs-pie
461}
462
463# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
464# indicate whether code for SSP is being generated for all functions
465has_ssp_all() {
466 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
467
468 # note; this matches only -fstack-protector-all
469 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
470 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
471 gcc-specs-ssp-all
472}
473
474# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
475# indicate whether code for SSP is being generated
476has_ssp() {
477 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
478
479 # note; this matches both -fstack-protector and -fstack-protector-all
480 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
481 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
482 gcc-specs-ssp
483}
484
485has_m64() {
486 # this doesnt test if the flag is accepted, it tests if the flag
487 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
488 # please dont replace this function with test_flag in some future
489 # clean-up!
490
491 local temp="$(emktemp)"
492 echo "int main() { return(0); }" > "${temp}".c
493 MY_CC=$(tc-getCC)
494 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
495 local ret=$?
496 rm -f "${temp}".c
497 [[ ${ret} != 1 ]] && return 0
498 return 1
499}
500
501has_m32() {
502 # this doesnt test if the flag is accepted, it tests if the flag
503 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
504 # please dont replace this function with test_flag in some future
505 # clean-up!
506
507 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
508
509 local temp=$(emktemp)
510 echo "int main() { return(0); }" > "${temp}".c
511 MY_CC=$(tc-getCC)
512 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
513 local ret=$?
514 rm -f "${temp}".c
515 [[ ${ret} != 1 ]] && return 0
516 return 1
517}
518
519replace-sparc64-flags() {
520 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
521
522 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
523 for x in ${SPARC64_CPUS}; do
524 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
525 done
526 else
527 for x in ${SPARC64_CPUS}; do
528 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
529 done
530 fi
531
532 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
533 for x in ${SPARC64_CPUS}; do
534 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
535 done
536 else
537 for x in ${SPARC64_CPUS}; do
538 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
539 done
540 fi
541
542 export CFLAGS CXXFLAGS
543}
544
545append-ldflags() {
546 [[ -z $* ]] && return 0
547 export LDFLAGS="${LDFLAGS} $*"
548 return 0
549}
550
551# Remove flags from LDFLAGS - it's up to the ebuild to filter
552# CFLAGS and CXXFLAGS via filter-flags if they need to.
553filter-ldflags() {
554 _filter-var LDFLAGS "$@"
555 return 0
556}
557
558# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
559# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
560# to gcc where it needs the '-Wl,'.
561raw-ldflags() {
562 local x input="$@"
563 [[ -z ${input} ]] && input=${LDFLAGS}
564 set --
565 for x in ${input} ; do
566 x=${x#-Wl,}
567 set -- "$@" ${x//,/ }
568 done
569 echo "$@"
570}
571
572# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
573# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
574# fixes.
575#
576# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
577gcc2-flags() {
578 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
579 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
580 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
581 fi
582
583 replace-cpu-flags k6-{2,3} k6
584 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
585
586 replace-cpu-flags pentium-mmx i586
587 replace-cpu-flags pentium{2,3,4} i686
588
589 replace-cpu-flags ev6{7,8} ev6
590
591 export CFLAGS CXXFLAGS
592}
593
594# Gets the flags needed for "NOW" binding
595bindnow-flags() {
596 case $($(tc-getLD) -v 2>&1 </dev/null) in
597 *GNU* | *'with BFD'*) # GNU ld
598 echo "-Wl,-z,now" ;;
599 *Apple*) # Darwin ld
600 echo "-bind_at_load" ;;
601 *)
602 # Some linkers just recognize -V instead of -v
603 case $($(tc-getLD) -V 2>&1 </dev/null) in
604 *Solaris*) # Solaris accept almost the same GNU options
605 echo "-Wl,-z,now" ;;
606 esac
607 ;;
608 esac
609}

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