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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 1.88 2005/07/06 20:20:03 agriffis Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS" 5INHERITED="$INHERITED $ECLASS"
9IUSE="$IUSE debug" 6
7# need access to emktemp()
8inherit eutils toolchain-funcs multilib
10 9
11# 10#
12#### filter-flags <flags> #### 11#### filter-flags <flags> ####
13# Remove particular flags from C[XX]FLAGS 12# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags 13# Matches only complete flags
17# Add extra flags to your current C[XX]FLAGS 16# Add extra flags to your current C[XX]FLAGS
18# 17#
19#### replace-flags <orig.flag> <new.flag> ### 18#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one 19# Replace a flag by another one
21# 20#
22#### replace-cpu-flags <new.cpu> <old.cpus> ### 21#### replace-cpu-flags <old.cpus> <new.cpu> ###
23# Replace march/mcpu flags that specify <old.cpus> 22# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu> 23# with flags that specify <new.cpu>
25# 24#
26#### is-flag <flag> #### 25#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
51# Add extra flags to your current LDFLAGS 50# Add extra flags to your current LDFLAGS
52# 51#
53#### filter-ldflags <flags> #### 52#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS 53# Remove particular flags from LDFLAGS
55# Matches only complete flags 54# 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# 55#
62#### fstack-flags #### 56#### fstack-flags ####
63# hooked function for hardened gcc that appends 57# hooked function for hardened gcc that appends
64# -fno-stack-protector to {C,CXX,LD}FLAGS 58# -fno-stack-protector to {C,CXX,LD}FLAGS
65# when a package is filtering -fstack-protector, -fstack-protector-all 59# when a package is filtering -fstack-protector, -fstack-protector-all
66# notice: modern automatic specs files will also suppress -fstack-protector-all 60# notice: modern automatic specs files will also suppress -fstack-protector-all
67# when only -fno-stack-protector is given 61# when only -fno-stack-protector is given
68# 62#
63#### has_pic ####
64# Returns true if the compiler by default or with current CFLAGS
65# builds position-independent code.
66#
67#### has_ssp_all ####
68# Returns true if the compiler by default or with current CFLAGS
69# generates stack smash protections for all functions
70#
71#### has_ssp ####
72# Returns true if the compiler by default or with current CFLAGS
73# generates stack smash protections for most vulnerable functions
74#
69 75
70# C[XX]FLAGS that we allow in strip-flags 76# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() { 77setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 78 if [[ -z ${ALLOWED_FLAGS} ]] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 79 export ALLOWED_FLAGS="-pipe"
74 case "${ARCH}" in 80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 84 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 85 fi
86 # allow a bunch of flags that negate features / control ABI
87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
88 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
89 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
90 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
91 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
92 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
93 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
94 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
82 95
83 # C[XX]FLAGS that we are think is ok, but needs testing 96 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's 97 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 98 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0 99 return 0
87} 100}
88 101
89filter-flags() { 102filter-flags() {
90 local x f fset 103 local x f fset
91 declare -a new_CFLAGS new_CXXFLAGS 104 declare -a new_CFLAGS new_CXXFLAGS
92 105
93 for x in "$@" ; do 106 for x in "$@" ; do
94 case "${x}" in 107 case "${x}" in
95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 108 -fPIC|-fpic|-fPIE|-fpie|-pie)
109 append-flags `test_flag -fno-pie`;;
96 -fstack-protector|-fstack-protector-all) fstack-flags;; 110 -fstack-protector|-fstack-protector-all)
111 fstack-flags;;
97 esac 112 esac
98 done 113 done
99 114
100 for fset in CFLAGS CXXFLAGS; do 115 for fset in CFLAGS CXXFLAGS; do
116 # Looping over the flags instead of using a global
117 # substitution ensures that we're working with flag atoms.
118 # Otherwise globs like -O* have the potential to wipe out the
119 # list of flags.
101 for f in ${!fset}; do 120 for f in ${!fset}; do
102 for x in "$@"; do 121 for x in "$@"; do
103 # Note this should work with globs like -O* 122 # Note this should work with globs like -O*
104 [[ ${f} == ${x} ]] && continue 2 123 [[ ${f} == ${x} ]] && continue 2
105 done 124 done
118append-lfs-flags() { 137append-lfs-flags() {
119 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 138 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
120} 139}
121 140
122append-flags() { 141append-flags() {
142 [[ -z $* ]] && return 0
123 export CFLAGS="${CFLAGS} $*" 143 export CFLAGS="${CFLAGS} $*"
124 export CXXFLAGS="${CXXFLAGS} $*" 144 export CXXFLAGS="${CXXFLAGS} $*"
125 [ -n "`is-flag -fno-stack-protector`" -o \ 145 [ -n "`is-flag -fno-stack-protector`" -o \
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
127 return 0 147 return 0
128} 148}
129 149
130replace-flags() { 150replace-flags() {
131 # we do this fancy spacing stuff so as to not filter 151 local f fset
132 # out part of a flag ... we want flag atoms ! :D 152 declare -a new_CFLAGS new_CXXFLAGS
133 CFLAGS=" ${CFLAGS} " 153
134 CXXFLAGS=" ${CXXFLAGS} " 154 for fset in CFLAGS CXXFLAGS; do
135 CFLAGS="${CFLAGS// ${1} / ${2} }" 155 # Looping over the flags instead of using a global
136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 156 # substitution ensures that we're working with flag atoms.
137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 157 # Otherwise globs like -O* have the potential to wipe out the
138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 158 # list of flags.
139 export CFLAGS CXXFLAGS 159 for f in ${!fset}; do
160 # Note this should work with globs like -O*
161 [[ ${f} == ${1} ]] && f=${2}
162 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
163 done
164 eval export ${fset}=\${new_${fset}\[*]}
165 done
166
140 return 0 167 return 0
141} 168}
142 169
143replace-cpu-flags() { 170replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift 171 local newcpu="$#" ; newcpu="${!newcpu}"
145 for oldcpu in "$@" ; do 172 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags
146 replace-flags -march=${oldcpu} -march=${newcpu} 175 replace-flags "-march=${1}" "-march=${newcpu}"
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 177 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift
149 done 179 done
150 return 0 180 return 0
151} 181}
152 182
153is-flag() { 183is-flag() {
154 local x 184 local x
155 185
156 for x in ${CFLAGS} ${CXXFLAGS} ; do 186 for x in ${CFLAGS} ${CXXFLAGS} ; do
187 # Note this should work with globs like -mcpu=ultrasparc*
157 if [ "${x}" == "$1" ] ; then 188 if [[ ${x} == ${1} ]]; then
158 echo true 189 echo true
159 return 0 190 return 0
160 fi 191 fi
161 done 192 done
162 return 1 193 return 1
195 226
196 local NEW_CFLAGS="" 227 local NEW_CFLAGS=""
197 local NEW_CXXFLAGS="" 228 local NEW_CXXFLAGS=""
198 229
199 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 230 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 231 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
201 use debug && einfo "Enabling the use of some unstable flags"
202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 232 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
203 fi 233 fi
204 234
205 set -f # disable pathname expansion 235 set -f # disable pathname expansion
206 236
207 for x in ${CFLAGS}; do 237 for x in ${CFLAGS}; do
208 for y in ${ALLOWED_FLAGS}; do 238 for y in ${ALLOWED_FLAGS}; do
209 flag=${x%%=*} 239 flag=${x%%=*}
210 if [ "${flag%%${y}}" = "" ]; then 240 if [ "${flag%%${y}}" = "" ] ; then
211 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 241 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
212 break 242 break
213 fi 243 fi
214 done 244 done
215 done 245 done
216 246
217 for x in ${CXXFLAGS}; do 247 for x in ${CXXFLAGS}; do
218 for y in ${ALLOWED_FLAGS}; do 248 for y in ${ALLOWED_FLAGS}; do
219 flag=${x%%=*} 249 flag=${x%%=*}
220 if [ "${flag%%${y}}" = "" ]; then 250 if [ "${flag%%${y}}" = "" ] ; then
221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 251 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
222 break 252 break
223 fi 253 fi
224 done 254 done
225 done 255 done
238 export CXXFLAGS="${NEW_CXXFLAGS}" 268 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0 269 return 0
240} 270}
241 271
242test_flag() { 272test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *} 273 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" "$*" 274 printf "%s\n" "$*"
246 return 0 275 return 0
247 fi 276 fi
248 return 1 277 return 1
249} 278}
250 279
251test_version_info() { 280test_version_info() {
252 local cc=${CC:-gcc} ; cc=${cc%% *}
253 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 281 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
254 return 0 282 return 0
255 else 283 else
256 return 1 284 return 1
257 fi 285 fi
258} 286}
287 done 315 done
288 return 1 316 return 1
289} 317}
290 318
291has_hardened() { 319has_hardened() {
292 test_version_info Hardened 320 test_version_info Hardened && return 0
321 # the specs file wont exist unless gcc has GCC_SPECS support
322 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
323 return 0
293 return $? 324 return 1
294} 325}
295 326
327# indicate whether PIC is set
296has_pic() { 328has_pic() {
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
299 test_version_info pie && return 0 331 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
300 return 1 332 return 1
301} 333}
302 334
335# indicate whether PIE is set
303has_pie() { 336has_pie() {
304 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 337 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
305 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 338 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
306 test_version_info pie && return 0 339 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
340 # test PIC while waiting for specs to be updated to generate __PIE__
341 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
307 return 1 342 return 1
308} 343}
309 344
345# indicate whether code for SSP is being generated for all functions
346has_ssp_all() {
347 # note; this matches only -fstack-protector-all
348 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
349 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
350 return 1
351}
352
353# indicate whether code for SSP is being generated
310has_ssp() { 354has_ssp() {
355 # note; this matches both -fstack-protector and -fstack-protector-all
311 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 356 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
312 test_version_info ssp && return 0 357 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
313 return 1 358 return 1
314} 359}
315 360
316has_m64() { 361has_m64() {
317 # this doesnt test if the flag is accepted, it tests if the flag 362 # this doesnt test if the flag is accepted, it tests if the flag
318 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 363 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
319 # please dont replace this function with test_flag in some future 364 # please dont replace this function with test_flag in some future
320 # clean-up! 365 # clean-up!
321 temp=`mktemp` 366 local temp="$(emktemp)"
322 echo "int main() { return(0); }" > ${temp}.c 367 echo "int main() { return(0); }" > ${temp}.c
323 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 368 MY_CC=$(tc-getCC)
324 ret=$? 369 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
370 local ret=$?
325 rm -f ${temp}.c 371 rm -f ${temp}.c
326 [ "$ret" != "1" ] && return 0 372 [ "$ret" != "1" ] && return 0
327 return 1 373 return 1
328} 374}
329 375
330has_m32() { 376has_m32() {
331 # this doesnt test if the flag is accepted, it tests if the flag 377 # this doesnt test if the flag is accepted, it tests if the flag
332 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 378 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
333 # please dont replace this function with test_flag in some future 379 # please dont replace this function with test_flag in some future
334 # clean-up! 380 # clean-up!
335 temp=`mktemp` 381
382 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
383
384 local temp="$(emktemp)"
336 echo "int main() { return(0); }" > ${temp}.c 385 echo "int main() { return(0); }" > ${temp}.c
337 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 386 MY_CC=$(tc-getCC)
338 ret=$? 387 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
388 local ret=$?
339 rm -f ${temp}.c 389 rm -f ${temp}.c
340 [ "$ret" != "1" ] && return 0 390 [ "$ret" != "1" ] && return 0
341 return 1 391 return 1
342} 392}
343 393
344replace-sparc64-flags() { 394replace-sparc64-flags() {
345 local SPARC64_CPUS="ultrasparc v9" 395 local SPARC64_CPUS="ultrasparc v9"
346 396
347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 397 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
348 for x in ${SPARC64_CPUS}; do 398 for x in ${SPARC64_CPUS}; do
349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 399 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
350 done 400 done
351 else 401 else
352 for x in ${SPARC64_CPUS}; do 402 for x in ${SPARC64_CPUS}; do
353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 403 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
354 done 404 done
355 fi 405 fi
356 406
357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 407 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
358 for x in ${SPARC64_CPUS}; do 408 for x in ${SPARC64_CPUS}; do
359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 409 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
360 done 410 done
361 else 411 else
362 for x in ${SPARC64_CPUS}; do 412 for x in ${SPARC64_CPUS}; do
377 427
378 # we do this fancy spacing stuff so as to not filter 428 # we do this fancy spacing stuff so as to not filter
379 # out part of a flag ... we want flag atoms ! :D 429 # out part of a flag ... we want flag atoms ! :D
380 LDFLAGS=" ${LDFLAGS} " 430 LDFLAGS=" ${LDFLAGS} "
381 for x in "$@" ; do 431 for x in "$@" ; do
382 LDFLAGS="${LDFLAGS// ${x} / }" 432 LDFLAGS=${LDFLAGS// ${x} / }
383 done 433 done
434 [[ -z ${LDFLAGS// } ]] \
435 && LDFLAGS="" \
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 436 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
385 export LDFLAGS 437 export LDFLAGS
386 return 0
387}
388
389etexec-flags() {
390 # if you're not using a hardened compiler you wont need this
391 # PIC/no-pic kludge in the first place.
392 has_hardened || return 0
393
394 if has_pie || has_pic; then
395 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] &&
398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
399 fi
400 return 0 438 return 0
401} 439}
402 440
403fstack-flags() { 441fstack-flags() {
404 if has_ssp; then 442 if has_ssp; then
405 [ -z "`is-flag -fno-stack-protector`" ] && 443 [ -z "`is-flag -fno-stack-protector`" ] &&
406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 444 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
407 fi 445 fi
408 return 0 446 return 0
409} 447}
448
449# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
450# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
451# fixes.
452#
453# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
454gcc2-flags() {
455 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
456 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
457 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
458 fi
459
460 replace-cpu-flags k6-{2,3} k6
461 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
462
463 replace-cpu-flags pentium-mmx i586
464 replace-cpu-flags pentium{2,3,4} i686
465
466 replace-cpu-flags ev6{7,8} ev6
467
468 export CFLAGS CXXFLAGS
469}

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