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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 1.93 2005/09/27 01:06:47 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#
63################ DEPRECATED functions ################
64# The following are still present to avoid breaking existing
65# code more than necessary; however they are deprecated. Please
66# use gcc-specs-* from toolchain-funcs.eclass instead, if you
67# need to know which hardened techs are active in the compiler.
68# See bug #100974
69#
70#### has_hardened ####
71# Returns true if the compiler has 'Hardened' in its version string,
72# (note; switched-spec vanilla compilers satisfy this condition) or
73# the specs file name contains 'hardened'.
74#
75#### has_pie ####
76# Returns true if the compiler by default or with current CFLAGS
77# builds position-independent code.
78#
79#### has_pic ####
80# Returns true if the compiler by default or with current CFLAGS
81# builds position-independent code.
82#
83#### has_ssp_all ####
84# Returns true if the compiler by default or with current CFLAGS
85# generates stack smash protections for all functions
86#
87#### has_ssp ####
88# Returns true if the compiler by default or with current CFLAGS
89# generates stack smash protections for most vulnerable functions
90#
69 91
70# C[XX]FLAGS that we allow in strip-flags 92# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() { 93setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 94 if [[ -z ${ALLOWED_FLAGS} ]] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 95 export ALLOWED_FLAGS="-pipe"
74 case "${ARCH}" in 96 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 100 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 101 fi
102 # allow a bunch of flags that negate features / control ABI
103 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
104 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
105 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
106 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
107 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
108 -mieee -mieee-with-inexact \
109 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
110 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
111 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
112 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
82 113
83 # C[XX]FLAGS that we are think is ok, but needs testing 114 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's 115 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 116 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0 117 return 0
87} 118}
88 119
89filter-flags() { 120filter-flags() {
90 local x f fset 121 local x f fset
91 declare -a new_CFLAGS new_CXXFLAGS 122 declare -a new_CFLAGS new_CXXFLAGS
92 123
93 for x in "$@" ; do 124 for x in "$@" ; do
94 case "${x}" in 125 case "${x}" in
95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 126 -fPIC|-fpic|-fPIE|-fpie|-pie)
127 append-flags `test_flag -fno-pie`;;
96 -fstack-protector|-fstack-protector-all) fstack-flags;; 128 -fstack-protector|-fstack-protector-all)
129 fstack-flags;;
97 esac 130 esac
98 done 131 done
99 132
100 for fset in CFLAGS CXXFLAGS; do 133 for fset in CFLAGS CXXFLAGS; do
134 # Looping over the flags instead of using a global
135 # substitution ensures that we're working with flag atoms.
136 # Otherwise globs like -O* have the potential to wipe out the
137 # list of flags.
101 for f in ${!fset}; do 138 for f in ${!fset}; do
102 for x in "$@"; do 139 for x in "$@"; do
103 # Note this should work with globs like -O* 140 # Note this should work with globs like -O*
104 [[ ${f} == ${x} ]] && continue 2 141 [[ ${f} == ${x} ]] && continue 2
105 done 142 done
110 147
111 return 0 148 return 0
112} 149}
113 150
114filter-lfs-flags() { 151filter-lfs-flags() {
152 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
115 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 153 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
116} 154}
117 155
118append-lfs-flags() { 156append-lfs-flags() {
157 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
119 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 158 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
120} 159}
121 160
122append-flags() { 161append-flags() {
162 [[ -z $* ]] && return 0
123 export CFLAGS="${CFLAGS} $*" 163 export CFLAGS="${CFLAGS} $*"
124 export CXXFLAGS="${CXXFLAGS} $*" 164 export CXXFLAGS="${CXXFLAGS} $*"
125 [ -n "`is-flag -fno-stack-protector`" -o \ 165 [ -n "`is-flag -fno-stack-protector`" -o \
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 166 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
127 return 0 167 return 0
128} 168}
129 169
130replace-flags() { 170replace-flags() {
131 # we do this fancy spacing stuff so as to not filter 171 [[ $# != 2 ]] \
132 # out part of a flag ... we want flag atoms ! :D 172 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
133 CFLAGS=" ${CFLAGS} " 173 && die "replace-flags takes 2 arguments, not $#"
134 CXXFLAGS=" ${CXXFLAGS} " 174
135 CFLAGS="${CFLAGS// ${1} / ${2} }" 175 local f fset
136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 176 declare -a new_CFLAGS new_CXXFLAGS
137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 177
138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 178 for fset in CFLAGS CXXFLAGS; do
139 export CFLAGS CXXFLAGS 179 # Looping over the flags instead of using a global
180 # substitution ensures that we're working with flag atoms.
181 # Otherwise globs like -O* have the potential to wipe out the
182 # list of flags.
183 for f in ${!fset}; do
184 # Note this should work with globs like -O*
185 [[ ${f} == ${1} ]] && f=${2}
186 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
187 done
188 eval export ${fset}=\${new_${fset}\[*]}
189 done
190
140 return 0 191 return 0
141} 192}
142 193
143replace-cpu-flags() { 194replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift 195 local newcpu="$#" ; newcpu="${!newcpu}"
145 for oldcpu in "$@" ; do 196 while [ $# -gt 1 ] ; do
197 # quote to make sure that no globbing is done (particularly on
198 # ${oldcpu} prior to calling replace-flags
146 replace-flags -march=${oldcpu} -march=${newcpu} 199 replace-flags "-march=${1}" "-march=${newcpu}"
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 200 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 201 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
202 shift
149 done 203 done
150 return 0 204 return 0
151} 205}
152 206
153is-flag() { 207is-flag() {
154 local x 208 local x
155 209
156 for x in ${CFLAGS} ${CXXFLAGS} ; do 210 for x in ${CFLAGS} ${CXXFLAGS} ; do
211 # Note this should work with globs like -mcpu=ultrasparc*
157 if [ "${x}" == "$1" ] ; then 212 if [[ ${x} == ${1} ]]; then
158 echo true 213 echo true
159 return 0 214 return 0
160 fi 215 fi
161 done 216 done
162 return 1 217 return 1
195 250
196 local NEW_CFLAGS="" 251 local NEW_CFLAGS=""
197 local NEW_CXXFLAGS="" 252 local NEW_CXXFLAGS=""
198 253
199 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 254 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 255 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
201 use debug && einfo "Enabling the use of some unstable flags"
202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 256 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
203 fi 257 fi
204 258
205 set -f # disable pathname expansion 259 set -f # disable pathname expansion
206 260
207 for x in ${CFLAGS}; do 261 for x in ${CFLAGS}; do
208 for y in ${ALLOWED_FLAGS}; do 262 for y in ${ALLOWED_FLAGS}; do
209 flag=${x%%=*} 263 flag=${x%%=*}
210 if [ "${flag%%${y}}" = "" ]; then 264 if [ "${flag%%${y}}" = "" ] ; then
211 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 265 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
212 break 266 break
213 fi 267 fi
214 done 268 done
215 done 269 done
216 270
217 for x in ${CXXFLAGS}; do 271 for x in ${CXXFLAGS}; do
218 for y in ${ALLOWED_FLAGS}; do 272 for y in ${ALLOWED_FLAGS}; do
219 flag=${x%%=*} 273 flag=${x%%=*}
220 if [ "${flag%%${y}}" = "" ]; then 274 if [ "${flag%%${y}}" = "" ] ; then
221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 275 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
222 break 276 break
223 fi 277 fi
224 done 278 done
225 done 279 done
238 export CXXFLAGS="${NEW_CXXFLAGS}" 292 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0 293 return 0
240} 294}
241 295
242test_flag() { 296test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *} 297 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" "$*" 298 printf "%s\n" "$*"
246 return 0 299 return 0
247 fi 300 fi
248 return 1 301 return 1
249} 302}
250 303
251test_version_info() { 304test_version_info() {
252 local cc=${CC:-gcc} ; cc=${cc%% *}
253 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 305 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
254 return 0 306 return 0
255 else 307 else
256 return 1 308 return 1
257 fi 309 fi
258} 310}
286 fi 338 fi
287 done 339 done
288 return 1 340 return 1
289} 341}
290 342
343# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
291has_hardened() { 344has_hardened() {
292 test_version_info Hardened 345 test_version_info Hardened && return 0
346 # the specs file wont exist unless gcc has GCC_SPECS support
347 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
348 return 0
293 return $? 349 return 1
294} 350}
295 351
352# DEPRECATED - use gcc-specs-pie from toolchain-funcs
353# indicate whether PIC is set
296has_pic() { 354has_pic() {
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 355 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 356 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
299 test_version_info pie && return 0 357 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
300 return 1 358 return 1
301} 359}
302 360
361# DEPRECATED - use gcc-specs-pie from toolchain-funcs
362# indicate whether PIE is set
303has_pie() { 363has_pie() {
304 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 364 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
305 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 365 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
306 test_version_info pie && return 0 366 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
367 # test PIC while waiting for specs to be updated to generate __PIE__
368 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
307 return 1 369 return 1
308} 370}
309 371
372# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
373# indicate whether code for SSP is being generated for all functions
374has_ssp_all() {
375 # note; this matches only -fstack-protector-all
376 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
377 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
378 gcc-specs-ssp && return 0
379 return 1
380}
381
382# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
383# indicate whether code for SSP is being generated
310has_ssp() { 384has_ssp() {
385 # note; this matches both -fstack-protector and -fstack-protector-all
311 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 386 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
312 test_version_info ssp && return 0 387 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
388 gcc-specs-ssp && return 0
313 return 1 389 return 1
314} 390}
315 391
316has_m64() { 392has_m64() {
317 # this doesnt test if the flag is accepted, it tests if the flag 393 # this doesnt test if the flag is accepted, it tests if the flag
318 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 394 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
319 # please dont replace this function with test_flag in some future 395 # please dont replace this function with test_flag in some future
320 # clean-up! 396 # clean-up!
321 temp=`mktemp` 397 local temp="$(emktemp)"
322 echo "int main() { return(0); }" > ${temp}.c 398 echo "int main() { return(0); }" > ${temp}.c
323 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 399 MY_CC=$(tc-getCC)
324 ret=$? 400 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
401 local ret=$?
325 rm -f ${temp}.c 402 rm -f ${temp}.c
326 [ "$ret" != "1" ] && return 0 403 [ "$ret" != "1" ] && return 0
327 return 1 404 return 1
328} 405}
329 406
330has_m32() { 407has_m32() {
331 # this doesnt test if the flag is accepted, it tests if the flag 408 # this doesnt test if the flag is accepted, it tests if the flag
332 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 409 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
333 # please dont replace this function with test_flag in some future 410 # please dont replace this function with test_flag in some future
334 # clean-up! 411 # clean-up!
335 temp=`mktemp` 412
413 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
414
415 local temp="$(emktemp)"
336 echo "int main() { return(0); }" > ${temp}.c 416 echo "int main() { return(0); }" > ${temp}.c
337 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 417 MY_CC=$(tc-getCC)
338 ret=$? 418 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
419 local ret=$?
339 rm -f ${temp}.c 420 rm -f ${temp}.c
340 [ "$ret" != "1" ] && return 0 421 [ "$ret" != "1" ] && return 0
341 return 1 422 return 1
342} 423}
343 424
344replace-sparc64-flags() { 425replace-sparc64-flags() {
345 local SPARC64_CPUS="ultrasparc v9" 426 local SPARC64_CPUS="ultrasparc v9"
346 427
347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 428 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
348 for x in ${SPARC64_CPUS}; do 429 for x in ${SPARC64_CPUS}; do
349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 430 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
350 done 431 done
351 else 432 else
352 for x in ${SPARC64_CPUS}; do 433 for x in ${SPARC64_CPUS}; do
353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 434 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
354 done 435 done
355 fi 436 fi
356 437
357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 438 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
358 for x in ${SPARC64_CPUS}; do 439 for x in ${SPARC64_CPUS}; do
359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 440 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
360 done 441 done
361 else 442 else
362 for x in ${SPARC64_CPUS}; do 443 for x in ${SPARC64_CPUS}; do
377 458
378 # we do this fancy spacing stuff so as to not filter 459 # we do this fancy spacing stuff so as to not filter
379 # out part of a flag ... we want flag atoms ! :D 460 # out part of a flag ... we want flag atoms ! :D
380 LDFLAGS=" ${LDFLAGS} " 461 LDFLAGS=" ${LDFLAGS} "
381 for x in "$@" ; do 462 for x in "$@" ; do
382 LDFLAGS="${LDFLAGS// ${x} / }" 463 LDFLAGS=${LDFLAGS// ${x} / }
383 done 464 done
465 [[ -z ${LDFLAGS// } ]] \
466 && LDFLAGS="" \
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 467 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
385 export LDFLAGS 468 export LDFLAGS
386 return 0 469 return 0
387} 470}
388 471
389etexec-flags() {
390 # if you're not using a hardened compiler you wont need this
391 # PIC/no-pic kludge in the first place.
392 has_hardened || return 0
393
394 if has_pie || has_pic; then
395 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] &&
398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
399 fi
400 return 0
401}
402
403fstack-flags() { 472fstack-flags() {
404 if has_ssp; then 473 if gcc-specs-ssp; then
405 [ -z "`is-flag -fno-stack-protector`" ] && 474 [ -z "`is-flag -fno-stack-protector`" ] &&
406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 475 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
407 fi 476 fi
408 return 0 477 return 0
409} 478}
479
480# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
481# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
482# fixes.
483#
484# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
485gcc2-flags() {
486 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
487 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
488 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
489 fi
490
491 replace-cpu-flags k6-{2,3} k6
492 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
493
494 replace-cpu-flags pentium-mmx i586
495 replace-cpu-flags pentium{2,3,4} i686
496
497 replace-cpu-flags ev6{7,8} ev6
498
499 export CFLAGS CXXFLAGS
500}

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