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1# Copyright 1999-2004 Gentoo Foundation 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 1.62 2004/07/15 04:59:44 lv Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.91 2005/07/22 21:47:51 vapier Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic 5
8INHERITED="$INHERITED $ECLASS" 6# need access to emktemp()
9IUSE="$IUSE debug" 7inherit eutils toolchain-funcs multilib
10 8
11# 9#
12#### filter-flags <flags> #### 10#### filter-flags <flags> ####
13# Remove particular flags from C[XX]FLAGS 11# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags 12# Matches only complete flags
17# Add extra flags to your current C[XX]FLAGS 15# Add extra flags to your current C[XX]FLAGS
18# 16#
19#### replace-flags <orig.flag> <new.flag> ### 17#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one 18# Replace a flag by another one
21# 19#
22#### replace-cpu-flags <new.cpu> <old.cpus> ### 20#### replace-cpu-flags <old.cpus> <new.cpu> ###
23# Replace march/mcpu flags that specify <old.cpus> 21# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu> 22# with flags that specify <new.cpu>
25# 23#
26#### is-flag <flag> #### 24#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
51# Add extra flags to your current LDFLAGS 49# Add extra flags to your current LDFLAGS
52# 50#
53#### filter-ldflags <flags> #### 51#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS 52# Remove particular flags from LDFLAGS
55# Matches only complete flags 53# Matches only complete flags
56#
57#### etexec-flags ####
58# hooked function for hardened gcc that appends
59# -fno-pic to {C,CXX,LD}FLAGS
60# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
61# 54#
62#### fstack-flags #### 55#### fstack-flags ####
63# hooked function for hardened gcc that appends 56# hooked function for hardened gcc that appends
64# -fno-stack-protector to {C,CXX,LD}FLAGS 57# -fno-stack-protector to {C,CXX,LD}FLAGS
65# when a package is filtering -fstack-protector, -fstack-protector-all 58# when a package is filtering -fstack-protector, -fstack-protector-all
66# notice: modern automatic specs files will also suppress -fstack-protector-all 59# notice: modern automatic specs files will also suppress -fstack-protector-all
67# when only -fno-stack-protector is given 60# when only -fno-stack-protector is given
68# 61#
62#### has_pic ####
63# Returns true if the compiler by default or with current CFLAGS
64# builds position-independent code.
65#
66#### has_ssp_all ####
67# Returns true if the compiler by default or with current CFLAGS
68# generates stack smash protections for all functions
69#
70#### has_ssp ####
71# Returns true if the compiler by default or with current CFLAGS
72# generates stack smash protections for most vulnerable functions
73#
69 74
70# C[XX]FLAGS that we allow in strip-flags 75# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() { 76setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 77 if [[ -z ${ALLOWED_FLAGS} ]] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 78 export ALLOWED_FLAGS="-pipe"
74 case "${ARCH}" in 79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
80 esac
81 fi 84 fi
85 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
88 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
89 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
90 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
91 -mieee -mieee-with-inexact \
92 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
93 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
94 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
95 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
82 96
83 # C[XX]FLAGS that we are think is ok, but needs testing 97 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's 98 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 99 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0 100 return 0
87} 101}
88 102
89filter-flags() { 103filter-flags() {
90 local x f fset 104 local x f fset
91 declare -a new_CFLAGS new_CXXFLAGS 105 declare -a new_CFLAGS new_CXXFLAGS
92 106
93 for x in "$@" ; do 107 for x in "$@" ; do
94 case "${x}" in 108 case "${x}" in
95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 109 -fPIC|-fpic|-fPIE|-fpie|-pie)
110 append-flags `test_flag -fno-pie`;;
96 -fstack-protector|-fstack-protector-all) fstack-flags;; 111 -fstack-protector|-fstack-protector-all)
112 fstack-flags;;
97 esac 113 esac
98 done 114 done
99 115
100 for fset in CFLAGS CXXFLAGS; do 116 for fset in CFLAGS CXXFLAGS; do
117 # Looping over the flags instead of using a global
118 # substitution ensures that we're working with flag atoms.
119 # Otherwise globs like -O* have the potential to wipe out the
120 # list of flags.
101 for f in ${!fset}; do 121 for f in ${!fset}; do
102 for x in "$@"; do 122 for x in "$@"; do
103 # Note this should work with globs like -O* 123 # Note this should work with globs like -O*
104 [[ ${f} == ${x} ]] && continue 2 124 [[ ${f} == ${x} ]] && continue 2
105 done 125 done
118append-lfs-flags() { 138append-lfs-flags() {
119 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
120} 140}
121 141
122append-flags() { 142append-flags() {
143 [[ -z $* ]] && return 0
123 export CFLAGS="${CFLAGS} $*" 144 export CFLAGS="${CFLAGS} $*"
124 export CXXFLAGS="${CXXFLAGS} $*" 145 export CXXFLAGS="${CXXFLAGS} $*"
125 [ -n "`is-flag -fno-stack-protector`" -o \ 146 [ -n "`is-flag -fno-stack-protector`" -o \
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 147 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
127 return 0 148 return 0
128} 149}
129 150
130replace-flags() { 151replace-flags() {
131 # we do this fancy spacing stuff so as to not filter 152 local f fset
132 # out part of a flag ... we want flag atoms ! :D 153 declare -a new_CFLAGS new_CXXFLAGS
133 CFLAGS=" ${CFLAGS} " 154
134 CXXFLAGS=" ${CXXFLAGS} " 155 for fset in CFLAGS CXXFLAGS; do
135 CFLAGS="${CFLAGS// ${1} / ${2} }" 156 # Looping over the flags instead of using a global
136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 157 # substitution ensures that we're working with flag atoms.
137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 158 # Otherwise globs like -O* have the potential to wipe out the
138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 159 # list of flags.
139 export CFLAGS CXXFLAGS 160 for f in ${!fset}; do
161 # Note this should work with globs like -O*
162 [[ ${f} == ${1} ]] && f=${2}
163 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
164 done
165 eval export ${fset}=\${new_${fset}\[*]}
166 done
167
140 return 0 168 return 0
141} 169}
142 170
143replace-cpu-flags() { 171replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift 172 local newcpu="$#" ; newcpu="${!newcpu}"
145 for oldcpu in "$@" ; do 173 while [ $# -gt 1 ] ; do
174 # quote to make sure that no globbing is done (particularly on
175 # ${oldcpu} prior to calling replace-flags
146 replace-flags -march=${oldcpu} -march=${newcpu} 176 replace-flags "-march=${1}" "-march=${newcpu}"
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 177 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 178 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
179 shift
149 done 180 done
150 return 0 181 return 0
151} 182}
152 183
153is-flag() { 184is-flag() {
154 local x 185 local x
155 186
156 for x in ${CFLAGS} ${CXXFLAGS} ; do 187 for x in ${CFLAGS} ${CXXFLAGS} ; do
188 # Note this should work with globs like -mcpu=ultrasparc*
157 if [ "${x}" == "$1" ] ; then 189 if [[ ${x} == ${1} ]]; then
158 echo true 190 echo true
159 return 0 191 return 0
160 fi 192 fi
161 done 193 done
162 return 1 194 return 1
195 227
196 local NEW_CFLAGS="" 228 local NEW_CFLAGS=""
197 local NEW_CXXFLAGS="" 229 local NEW_CXXFLAGS=""
198 230
199 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 231 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 232 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
201 use debug && einfo "Enabling the use of some unstable flags"
202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
203 fi 234 fi
204 235
205 set -f # disable pathname expansion 236 set -f # disable pathname expansion
206 237
207 for x in ${CFLAGS}; do 238 for x in ${CFLAGS}; do
208 for y in ${ALLOWED_FLAGS}; do 239 for y in ${ALLOWED_FLAGS}; do
209 flag=${x%%=*} 240 flag=${x%%=*}
210 if [ "${flag%%${y}}" = "" ]; then 241 if [ "${flag%%${y}}" = "" ] ; then
211 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 242 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
212 break 243 break
213 fi 244 fi
214 done 245 done
215 done 246 done
216 247
217 for x in ${CXXFLAGS}; do 248 for x in ${CXXFLAGS}; do
218 for y in ${ALLOWED_FLAGS}; do 249 for y in ${ALLOWED_FLAGS}; do
219 flag=${x%%=*} 250 flag=${x%%=*}
220 if [ "${flag%%${y}}" = "" ]; then 251 if [ "${flag%%${y}}" = "" ] ; then
221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 252 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
222 break 253 break
223 fi 254 fi
224 done 255 done
225 done 256 done
238 export CXXFLAGS="${NEW_CXXFLAGS}" 269 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0 270 return 0
240} 271}
241 272
242test_flag() { 273test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *} 274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
244 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
245 printf "%s\n" "$*" 275 printf "%s\n" "$*"
246 return 0 276 return 0
247 fi 277 fi
248 return 1 278 return 1
249} 279}
250 280
251test_version_info() { 281test_version_info() {
252 local cc=${CC:-gcc} ; cc=${cc%% *}
253 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
254 return 0 283 return 0
255 else 284 else
256 return 1 285 return 1
257 fi 286 fi
258} 287}
287 done 316 done
288 return 1 317 return 1
289} 318}
290 319
291has_hardened() { 320has_hardened() {
292 test_version_info Hardened 321 test_version_info Hardened && return 0
322 # the specs file wont exist unless gcc has GCC_SPECS support
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
324 return 0
293 return $? 325 return 1
294} 326}
295 327
328# indicate whether PIC is set
296has_pic() { 329has_pic() {
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 330 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 331 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
299 test_version_info pie && return 0 332 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
300 return 1 333 return 1
301} 334}
302 335
336# indicate whether PIE is set
303has_pie() { 337has_pie() {
304 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 338 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
305 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 339 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
306 test_version_info pie && return 0 340 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
341 # test PIC while waiting for specs to be updated to generate __PIE__
342 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
307 return 1 343 return 1
308} 344}
309 345
346# indicate whether code for SSP is being generated for all functions
347has_ssp_all() {
348 # note; this matches only -fstack-protector-all
349 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
350 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
351 return 1
352}
353
354# indicate whether code for SSP is being generated
310has_ssp() { 355has_ssp() {
356 # note; this matches both -fstack-protector and -fstack-protector-all
311 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 357 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
312 test_version_info ssp && return 0 358 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
313 return 1 359 return 1
314} 360}
315 361
316has_m64() { 362has_m64() {
317 # this doesnt test if the flag is accepted, it tests if the flag 363 # this doesnt test if the flag is accepted, it tests if the flag
318 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 364 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
319 # please dont replace this function with test_flag in some future 365 # please dont replace this function with test_flag in some future
320 # clean-up! 366 # clean-up!
321 temp=`mktemp` 367 local temp="$(emktemp)"
322 echo "int main() { return(0); }" > ${temp}.c 368 echo "int main() { return(0); }" > ${temp}.c
323 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 369 MY_CC=$(tc-getCC)
324 ret=$? 370 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
371 local ret=$?
325 rm -f ${temp}.c 372 rm -f ${temp}.c
326 [ "$ret" != "1" ] && return 0 373 [ "$ret" != "1" ] && return 0
327 return 1 374 return 1
328} 375}
329 376
330has_m32() { 377has_m32() {
331 # this doesnt test if the flag is accepted, it tests if the flag 378 # this doesnt test if the flag is accepted, it tests if the flag
332 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 379 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
333 # please dont replace this function with test_flag in some future 380 # please dont replace this function with test_flag in some future
334 # clean-up! 381 # clean-up!
335 temp=`mktemp` 382
383 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
384
385 local temp="$(emktemp)"
336 echo "int main() { return(0); }" > ${temp}.c 386 echo "int main() { return(0); }" > ${temp}.c
337 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 387 MY_CC=$(tc-getCC)
338 ret=$? 388 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
389 local ret=$?
339 rm -f ${temp}.c 390 rm -f ${temp}.c
340 [ "$ret" != "1" ] && return 0 391 [ "$ret" != "1" ] && return 0
341 return 1 392 return 1
342} 393}
343 394
344replace-sparc64-flags() { 395replace-sparc64-flags() {
345 local SPARC64_CPUS="ultrasparc v9" 396 local SPARC64_CPUS="ultrasparc v9"
346 397
347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 398 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
348 for x in ${SPARC64_CPUS}; do 399 for x in ${SPARC64_CPUS}; do
349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 400 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
350 done 401 done
351 else 402 else
352 for x in ${SPARC64_CPUS}; do 403 for x in ${SPARC64_CPUS}; do
353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 404 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
354 done 405 done
355 fi 406 fi
356 407
357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 408 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
358 for x in ${SPARC64_CPUS}; do 409 for x in ${SPARC64_CPUS}; do
359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 410 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
360 done 411 done
361 else 412 else
362 for x in ${SPARC64_CPUS}; do 413 for x in ${SPARC64_CPUS}; do
377 428
378 # we do this fancy spacing stuff so as to not filter 429 # we do this fancy spacing stuff so as to not filter
379 # out part of a flag ... we want flag atoms ! :D 430 # out part of a flag ... we want flag atoms ! :D
380 LDFLAGS=" ${LDFLAGS} " 431 LDFLAGS=" ${LDFLAGS} "
381 for x in "$@" ; do 432 for x in "$@" ; do
382 LDFLAGS="${LDFLAGS// ${x} / }" 433 LDFLAGS=${LDFLAGS// ${x} / }
383 done 434 done
435 [[ -z ${LDFLAGS// } ]] \
436 && LDFLAGS="" \
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 437 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
385 export LDFLAGS 438 export LDFLAGS
386 return 0
387}
388
389etexec-flags() {
390 # if you're not using a hardened compiler you wont need this
391 # PIC/no-pic kludge in the first place.
392 has_hardened || return 0
393
394 if has_pie || has_pic; then
395 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] &&
398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
399 fi
400 return 0 439 return 0
401} 440}
402 441
403fstack-flags() { 442fstack-flags() {
404 if has_ssp; then 443 if has_ssp; then
405 [ -z "`is-flag -fno-stack-protector`" ] && 444 [ -z "`is-flag -fno-stack-protector`" ] &&
406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 445 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
407 fi 446 fi
408 return 0 447 return 0
409} 448}
449
450# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
451# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
452# fixes.
453#
454# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
455gcc2-flags() {
456 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
457 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
458 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
459 fi
460
461 replace-cpu-flags k6-{2,3} k6
462 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
463
464 replace-cpu-flags pentium-mmx i586
465 replace-cpu-flags pentium{2,3,4} i686
466
467 replace-cpu-flags ev6{7,8} ev6
468
469 export CFLAGS CXXFLAGS
470}

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