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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 1.82 2005/02/07 17:50:24 solar 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 multilib
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
51# Add extra flags to your current LDFLAGS 55# Add extra flags to your current LDFLAGS
52# 56#
53#### filter-ldflags <flags> #### 57#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS 58# Remove particular flags from LDFLAGS
55# Matches only complete flags 59# 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# 60#
62#### fstack-flags #### 61#### fstack-flags ####
63# hooked function for hardened gcc that appends 62# hooked function for hardened gcc that appends
64# -fno-stack-protector to {C,CXX,LD}FLAGS 63# -fno-stack-protector to {C,CXX,LD}FLAGS
65# when a package is filtering -fstack-protector, -fstack-protector-all 64# when a package is filtering -fstack-protector, -fstack-protector-all
68# 67#
69 68
70# C[XX]FLAGS that we allow in strip-flags 69# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() { 70setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 71 if [ -z "${ALLOWED_FLAGS}" ] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 72 export ALLOWED_FLAGS="-pipe"
73 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
74 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector"
75 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
76 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
74 case "${ARCH}" in 77 case "${ARCH}" in
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
83 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
84 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;;
80 esac 85 esac
81 fi 86 fi
87 # allow a bunch of flags that negate features / control ABI
88 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
89 case "${ARCH}" in
90 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
91 esac
92 ALLOWED_FLAGS="${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 93
83 # C[XX]FLAGS that we are think is ok, but needs testing 94 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's 95 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 96 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0 97 return 0
90 local x f fset 101 local x f fset
91 declare -a new_CFLAGS new_CXXFLAGS 102 declare -a new_CFLAGS new_CXXFLAGS
92 103
93 for x in "$@" ; do 104 for x in "$@" ; do
94 case "${x}" in 105 case "${x}" in
95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 106 -fPIC|-fpic|-fPIE|-fpie|-pie)
107 append-flags `test_flag -fno-pie`;;
96 -fstack-protector|-fstack-protector-all) fstack-flags;; 108 -fstack-protector|-fstack-protector-all)
109 fstack-flags;;
97 esac 110 esac
98 done 111 done
99 112
100 for fset in CFLAGS CXXFLAGS; do 113 for fset in CFLAGS CXXFLAGS; do
114 # Looping over the flags instead of using a global
115 # substitution ensures that we're working with flag atoms.
116 # Otherwise globs like -O* have the potential to wipe out the
117 # list of flags.
101 for f in ${!fset}; do 118 for f in ${!fset}; do
102 for x in "$@"; do 119 for x in "$@"; do
103 # Note this should work with globs like -O* 120 # Note this should work with globs like -O*
104 [[ ${f} == ${x} ]] && continue 2 121 [[ ${f} == ${x} ]] && continue 2
105 done 122 done
118append-lfs-flags() { 135append-lfs-flags() {
119 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 136 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
120} 137}
121 138
122append-flags() { 139append-flags() {
140 [[ -z $* ]] && return 0
123 export CFLAGS="${CFLAGS} $*" 141 export CFLAGS="${CFLAGS} $*"
124 export CXXFLAGS="${CXXFLAGS} $*" 142 export CXXFLAGS="${CXXFLAGS} $*"
125 [ -n "`is-flag -fno-stack-protector`" -o \ 143 [ -n "`is-flag -fno-stack-protector`" -o \
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 144 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
127 return 0 145 return 0
128} 146}
129 147
130replace-flags() { 148replace-flags() {
131 # we do this fancy spacing stuff so as to not filter 149 local f fset
132 # out part of a flag ... we want flag atoms ! :D 150 declare -a new_CFLAGS new_CXXFLAGS
133 CFLAGS=" ${CFLAGS} " 151
134 CXXFLAGS=" ${CXXFLAGS} " 152 for fset in CFLAGS CXXFLAGS; do
135 CFLAGS="${CFLAGS// ${1} / ${2} }" 153 # Looping over the flags instead of using a global
136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 154 # substitution ensures that we're working with flag atoms.
137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 155 # Otherwise globs like -O* have the potential to wipe out the
138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 156 # list of flags.
139 export CFLAGS CXXFLAGS 157 for f in ${!fset}; do
158 # Note this should work with globs like -O*
159 [[ ${f} == ${1} ]] && f=${2}
160 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
161 done
162 eval export ${fset}=\${new_${fset}\[*]}
163 done
164
140 return 0 165 return 0
141} 166}
142 167
143replace-cpu-flags() { 168replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift 169 local newcpu="$#" ; newcpu="${!newcpu}"
145 for oldcpu in "$@" ; do 170 while [ $# -gt 1 ] ; do
171 # quote to make sure that no globbing is done (particularly on
172 # ${oldcpu} prior to calling replace-flags
146 replace-flags -march=${oldcpu} -march=${newcpu} 173 replace-flags "-march=${1}" "-march=${newcpu}"
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 174 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 175 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
176 shift
149 done 177 done
150 return 0 178 return 0
151} 179}
152 180
153is-flag() { 181is-flag() {
154 local x 182 local x
155 183
156 for x in ${CFLAGS} ${CXXFLAGS} ; do 184 for x in ${CFLAGS} ${CXXFLAGS} ; do
185 # Note this should work with globs like -mcpu=ultrasparc*
157 if [ "${x}" == "$1" ] ; then 186 if [[ ${x} == ${1} ]]; then
158 echo true 187 echo true
159 return 0 188 return 0
160 fi 189 fi
161 done 190 done
162 return 1 191 return 1
205 set -f # disable pathname expansion 234 set -f # disable pathname expansion
206 235
207 for x in ${CFLAGS}; do 236 for x in ${CFLAGS}; do
208 for y in ${ALLOWED_FLAGS}; do 237 for y in ${ALLOWED_FLAGS}; do
209 flag=${x%%=*} 238 flag=${x%%=*}
210 if [ "${flag%%${y}}" = "" ]; then 239 if [ "${flag%%${y}}" = "" ] ; then
211 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 240 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
212 break 241 break
213 fi 242 fi
214 done 243 done
215 done 244 done
216 245
217 for x in ${CXXFLAGS}; do 246 for x in ${CXXFLAGS}; do
218 for y in ${ALLOWED_FLAGS}; do 247 for y in ${ALLOWED_FLAGS}; do
219 flag=${x%%=*} 248 flag=${x%%=*}
220 if [ "${flag%%${y}}" = "" ]; then 249 if [ "${flag%%${y}}" = "" ] ; then
221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 250 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
222 break 251 break
223 fi 252 fi
224 done 253 done
225 done 254 done
238 export CXXFLAGS="${NEW_CXXFLAGS}" 267 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0 268 return 0
240} 269}
241 270
242test_flag() { 271test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *} 272 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" "$*" 273 printf "%s\n" "$*"
246 return 0 274 return 0
247 fi 275 fi
248 return 1 276 return 1
249} 277}
250 278
251test_version_info() { 279test_version_info() {
252 local cc=${CC:-gcc} ; cc=${cc%% *}
253 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 280 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
254 return 0 281 return 0
255 else 282 else
256 return 1 283 return 1
257 fi 284 fi
258} 285}
287 done 314 done
288 return 1 315 return 1
289} 316}
290 317
291has_hardened() { 318has_hardened() {
292 test_version_info Hardened 319 test_version_info Hardened && return 0
320 # the specs file wont exist unless gcc has GCC_SPECS support
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
322 return 0
293 return $? 323 return 1
294} 324}
295 325
326# indicate whether PIC is set
296has_pic() { 327has_pic() {
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 328 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 329 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
330 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
299 test_version_info pie && return 0 331 test_version_info pie && return 0
300 return 1 332 return 1
301} 333}
302 334
335# indicate whether PIE is set
303has_pie() { 336has_pie() {
304 [ "${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) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
307 return 1 342 return 1
308} 343}
309 344
345# indicate whether code for SSP is being generated
310has_ssp() { 346has_ssp() {
347 # note; this matches both -fstack-protector and -fstack-protector-all
311 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 348 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
312 test_version_info ssp && return 0 349 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
313 return 1 350 return 1
314} 351}
315 352
316has_m64() { 353has_m64() {
317 # this doesnt test if the flag is accepted, it tests if the flag 354 # this doesnt test if the flag is accepted, it tests if the flag
318 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 355 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
319 # please dont replace this function with test_flag in some future 356 # please dont replace this function with test_flag in some future
320 # clean-up! 357 # clean-up!
321 temp=`mktemp` 358 local temp="$(emktemp)"
322 echo "int main() { return(0); }" > ${temp}.c 359 echo "int main() { return(0); }" > ${temp}.c
323 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 360 MY_CC=$(tc-getCC)
324 ret=$? 361 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
362 local ret=$?
325 rm -f ${temp}.c 363 rm -f ${temp}.c
326 [ "$ret" != "1" ] && return 0 364 [ "$ret" != "1" ] && return 0
327 return 1 365 return 1
328} 366}
329 367
330has_m32() { 368has_m32() {
331 # this doesnt test if the flag is accepted, it tests if the flag 369 # this doesnt test if the flag is accepted, it tests if the flag
332 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 370 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
333 # please dont replace this function with test_flag in some future 371 # please dont replace this function with test_flag in some future
334 # clean-up! 372 # clean-up!
335 temp=`mktemp` 373
374 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
375
376 local temp="$(emktemp)"
336 echo "int main() { return(0); }" > ${temp}.c 377 echo "int main() { return(0); }" > ${temp}.c
337 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 378 MY_CC=$(tc-getCC)
338 ret=$? 379 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
380 local ret=$?
339 rm -f ${temp}.c 381 rm -f ${temp}.c
340 [ "$ret" != "1" ] && return 0 382 [ "$ret" != "1" ] && return 0
341 return 1 383 return 1
342} 384}
343 385
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 426 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
385 export LDFLAGS 427 export LDFLAGS
386 return 0 428 return 0
387} 429}
388 430
389etexec-flags() {
390 # if you're not using a hardened compiler you wont need this
391 # PIC/no-pic kludge in the first place.
392 has_hardened || return 0
393
394 if has_pie || has_pic; then
395 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] &&
398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
399 fi
400 return 0
401}
402
403fstack-flags() { 431fstack-flags() {
404 if has_ssp; then 432 if has_ssp; then
405 [ -z "`is-flag -fno-stack-protector`" ] && 433 [ -z "`is-flag -fno-stack-protector`" ] &&
406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 434 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
407 fi 435 fi
408 return 0 436 return 0
409} 437}
438
439# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
440# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
441# fixes.
442#
443# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
444gcc2-flags() {
445 CFLAGS=${CFLAGS//pentium-mmx/i586}
446 CFLAGS=${CFLAGS//pentium[234]/i686}
447 CFLAGS=${CFLAGS//k6-[23]/k6}
448 CFLAGS=${CFLAGS//athlon-tbird/i686}
449 CFLAGS=${CFLAGS//athlon-4/i686}
450 CFLAGS=${CFLAGS//athlon-[xm]p/i686}
451 CFLAGS=${CFLAGS//athlon/i686}
452
453 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
454 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
455 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
456 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
457 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
458 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
459 CXXFLAGS=${CXXFLAGS//athlon/i686}
460
461 if [ "$ARCH" = alpha ]; then
462 CHOST=${CHOST/#alphaev6[78]/alphaev6}
463 CFLAGS=${CFLAGS//ev6[78]/ev6}
464 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
465 fi
466
467 export CFLAGS CXXFLAGS
468}

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