/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.62 Revision 1.78
1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2004 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 1.78 2004/12/22 21:18:35 eradicator Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Author Bart Verwilst <verwilst@gentoo.org>
6 6
7ECLASS=flag-o-matic 7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS" 8INHERITED="$INHERITED $ECLASS"
9
9IUSE="$IUSE debug" 10IUSE="debug"
11
12# need access to emktemp()
13inherit eutils toolchain-funcs
10 14
11# 15#
12#### filter-flags <flags> #### 16#### filter-flags <flags> ####
13# Remove particular flags from C[XX]FLAGS 17# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags 18# Matches only complete flags
17# Add extra flags to your current C[XX]FLAGS 21# Add extra flags to your current C[XX]FLAGS
18# 22#
19#### replace-flags <orig.flag> <new.flag> ### 23#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one 24# Replace a flag by another one
21# 25#
22#### replace-cpu-flags <new.cpu> <old.cpus> ### 26#### replace-cpu-flags <old.cpus> <new.cpu> ###
23# Replace march/mcpu flags that specify <old.cpus> 27# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu> 28# with flags that specify <new.cpu>
25# 29#
26#### is-flag <flag> #### 30#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS 31# Returns "true" if flag is set in C[XX]FLAGS
68# 72#
69 73
70# C[XX]FLAGS that we allow in strip-flags 74# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() { 75setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 76 if [ -z "${ALLOWED_FLAGS}" ] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 77 export ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
74 case "${ARCH}" in 82 case "${ARCH}" in
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
80 esac 89 esac
81 fi 90 fi
91 # allow a bunch of flags that negate features / control ABI
92 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
93 case "${ARCH}" in
94 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
95 esac
96 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
82 97
83 # C[XX]FLAGS that we are think is ok, but needs testing 98 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's 99 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 100 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0 101 return 0
96 -fstack-protector|-fstack-protector-all) fstack-flags;; 111 -fstack-protector|-fstack-protector-all) 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
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 145 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
127 return 0 146 return 0
128} 147}
129 148
130replace-flags() { 149replace-flags() {
131 # we do this fancy spacing stuff so as to not filter 150 local f fset
132 # out part of a flag ... we want flag atoms ! :D 151 declare -a new_CFLAGS new_CXXFLAGS
133 CFLAGS=" ${CFLAGS} " 152
134 CXXFLAGS=" ${CXXFLAGS} " 153 for fset in CFLAGS CXXFLAGS; do
135 CFLAGS="${CFLAGS// ${1} / ${2} }" 154 # Looping over the flags instead of using a global
136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 155 # substitution ensures that we're working with flag atoms.
137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 156 # Otherwise globs like -O* have the potential to wipe out the
138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 157 # list of flags.
139 export CFLAGS CXXFLAGS 158 for f in ${!fset}; do
159 # Note this should work with globs like -O*
160 [[ ${f} == ${1} ]] && f=${2}
161 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
162 done
163 eval export ${fset}=\${new_${fset}\[*]}
164 done
165
140 return 0 166 return 0
141} 167}
142 168
143replace-cpu-flags() { 169replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift 170 local newcpu="$#" ; newcpu="${!newcpu}"
145 for oldcpu in "$@" ; do 171 while [ $# -gt 1 ] ; do
172 # quote to make sure that no globbing is done (particularly on
173 # ${oldcpu} prior to calling replace-flags
146 replace-flags -march=${oldcpu} -march=${newcpu} 174 replace-flags "-march=${1}" "-march=${newcpu}"
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 175 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 176 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
177 shift
149 done 178 done
150 return 0 179 return 0
151} 180}
152 181
153is-flag() { 182is-flag() {
154 local x 183 local x
155 184
156 for x in ${CFLAGS} ${CXXFLAGS} ; do 185 for x in ${CFLAGS} ${CXXFLAGS} ; do
186 # Note this should work with globs like -mcpu=ultrasparc*
157 if [ "${x}" == "$1" ] ; then 187 if [[ ${x} == ${1} ]]; then
158 echo true 188 echo true
159 return 0 189 return 0
160 fi 190 fi
161 done 191 done
162 return 1 192 return 1
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 $? 324 return 1
294} 325}
295 326
296has_pic() { 327has_pic() {
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 328 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 329 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
316has_m64() { 347has_m64() {
317 # this doesnt test if the flag is accepted, it tests if the flag 348 # this doesnt test if the flag is accepted, it tests if the flag
318 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 349 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
319 # please dont replace this function with test_flag in some future 350 # please dont replace this function with test_flag in some future
320 # clean-up! 351 # clean-up!
321 temp=`mktemp` 352 local temp="$(emktemp)"
322 echo "int main() { return(0); }" > ${temp}.c 353 echo "int main() { return(0); }" > ${temp}.c
323 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 354 MY_CC=$(tc-getCC)
324 ret=$? 355 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
356 local ret=$?
325 rm -f ${temp}.c 357 rm -f ${temp}.c
326 [ "$ret" != "1" ] && return 0 358 [ "$ret" != "1" ] && return 0
327 return 1 359 return 1
328} 360}
329 361
330has_m32() { 362has_m32() {
331 # this doesnt test if the flag is accepted, it tests if the flag 363 # this doesnt test if the flag is accepted, it tests if the flag
332 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 364 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
333 # please dont replace this function with test_flag in some future 365 # please dont replace this function with test_flag in some future
334 # clean-up! 366 # clean-up!
335 temp=`mktemp` 367 local temp="$(emktemp)"
336 echo "int main() { return(0); }" > ${temp}.c 368 echo "int main() { return(0); }" > ${temp}.c
337 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 369 MY_CC=$(tc-getCC)
338 ret=$? 370 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
371 local ret=$?
339 rm -f ${temp}.c 372 rm -f ${temp}.c
340 [ "$ret" != "1" ] && return 0 373 [ "$ret" != "1" ] && return 0
341 return 1 374 return 1
342} 375}
343 376
388 421
389etexec-flags() { 422etexec-flags() {
390 # if you're not using a hardened compiler you wont need this 423 # if you're not using a hardened compiler you wont need this
391 # PIC/no-pic kludge in the first place. 424 # PIC/no-pic kludge in the first place.
392 has_hardened || return 0 425 has_hardened || return 0
426 use amd64 && return 0
427 use mips && return 0
393 428
394 if has_pie || has_pic; then 429 if has_pie || has_pic; then
395 [ -z "`is-flag -fno-pic`" ] && 430 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`" 431 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] && 432 [ -z "`is-flag -nopie`" ] &&
405 [ -z "`is-flag -fno-stack-protector`" ] && 440 [ -z "`is-flag -fno-stack-protector`" ] &&
406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 441 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
407 fi 442 fi
408 return 0 443 return 0
409} 444}
445
446# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
447# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
448# fixes.
449#
450# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
451gcc2-flags() {
452 CFLAGS=${CFLAGS//pentium-mmx/i586}
453 CFLAGS=${CFLAGS//pentium[234]/i686}
454 CFLAGS=${CFLAGS//k6-[23]/k6}
455 CFLAGS=${CFLAGS//athlon-tbird/i686}
456 CFLAGS=${CFLAGS//athlon-4/i686}
457 CFLAGS=${CFLAGS//athlon-[xm]p/i686}
458 CFLAGS=${CFLAGS//athlon/i686}
459
460 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
461 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
462 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
463 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
464 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
465 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
466 CXXFLAGS=${CXXFLAGS//athlon/i686}
467
468 if [ "$ARCH" = alpha ]; then
469 CHOST=${CHOST/#alphaev6[78]/alphaev6}
470 CFLAGS=${CFLAGS//ev6[78]/ev6}
471 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
472 fi
473
474 export CFLAGS CXXFLAGS
475}

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