/[gentoo-x86]/eclass/flag-o-matic.eclass
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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 1.64 2004/07/22 15:29:10 agriffis 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 9
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
12IUSE="${IUSE} debug" 10IUSE="debug"
11
12# need access to emktemp()
13inherit eutils toolchain-funcs multilib
13 14
14# 15#
15#### filter-flags <flags> #### 16#### filter-flags <flags> ####
16# Remove particular flags from C[XX]FLAGS 17# Remove particular flags from C[XX]FLAGS
17# Matches only complete flags 18# Matches only complete flags
20# Add extra flags to your current C[XX]FLAGS 21# Add extra flags to your current C[XX]FLAGS
21# 22#
22#### replace-flags <orig.flag> <new.flag> ### 23#### replace-flags <orig.flag> <new.flag> ###
23# Replace a flag by another one 24# Replace a flag by another one
24# 25#
25#### replace-cpu-flags <new.cpu> <old.cpus> ### 26#### replace-cpu-flags <old.cpus> <new.cpu> ###
26# Replace march/mcpu flags that specify <old.cpus> 27# Replace march/mcpu flags that specify <old.cpus>
27# with flags that specify <new.cpu> 28# with flags that specify <new.cpu>
28# 29#
29#### is-flag <flag> #### 30#### is-flag <flag> ####
30# Returns "true" if flag is set in C[XX]FLAGS 31# Returns "true" if flag is set in C[XX]FLAGS
54# Add extra flags to your current LDFLAGS 55# Add extra flags to your current LDFLAGS
55# 56#
56#### filter-ldflags <flags> #### 57#### filter-ldflags <flags> ####
57# Remove particular flags from LDFLAGS 58# Remove particular flags from LDFLAGS
58# Matches only complete flags 59# Matches only complete flags
59#
60#### etexec-flags ####
61# hooked function for hardened gcc that appends
62# -fno-pic to {C,CXX,LD}FLAGS
63# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
64# 60#
65#### fstack-flags #### 61#### fstack-flags ####
66# hooked function for hardened gcc that appends 62# hooked function for hardened gcc that appends
67# -fno-stack-protector to {C,CXX,LD}FLAGS 63# -fno-stack-protector to {C,CXX,LD}FLAGS
68# when a package is filtering -fstack-protector, -fstack-protector-all 64# when a package is filtering -fstack-protector, -fstack-protector-all
71# 67#
72 68
73# C[XX]FLAGS that we allow in strip-flags 69# C[XX]FLAGS that we allow in strip-flags
74setup-allowed-flags() { 70setup-allowed-flags() {
75 if [ -z "${ALLOWED_FLAGS}" ] ; then 71 if [ -z "${ALLOWED_FLAGS}" ] ; then
76 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"
77 case "${ARCH}" in 77 case "${ARCH}" in
78 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" ;;
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
82 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" ;;
83 esac 85 esac
84 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"
85 93
86 # 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
87 # NOTE: currently -Os have issues with gcc3 and K6* arch's 95 # NOTE: currently -Os have issues with gcc3 and K6* arch's
88 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 96 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
89 return 0 97 return 0
93 local x f fset 101 local x f fset
94 declare -a new_CFLAGS new_CXXFLAGS 102 declare -a new_CFLAGS new_CXXFLAGS
95 103
96 for x in "$@" ; do 104 for x in "$@" ; do
97 case "${x}" in 105 case "${x}" in
98 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 106 -fPIC|-fpic|-fPIE|-fpie|-pie)
107 append-flags `test_flag -fno-pie`;;
99 -fstack-protector|-fstack-protector-all) fstack-flags;; 108 -fstack-protector|-fstack-protector-all)
109 fstack-flags;;
100 esac 110 esac
101 done 111 done
102 112
103 for fset in CFLAGS CXXFLAGS; do 113 for fset in CFLAGS CXXFLAGS; do
104 # Looping over the flags instead of using a global 114 # Looping over the flags instead of using a global
125append-lfs-flags() { 135append-lfs-flags() {
126 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
127} 137}
128 138
129append-flags() { 139append-flags() {
140 [[ -z $* ]] && return 0
130 export CFLAGS="${CFLAGS} $*" 141 export CFLAGS="${CFLAGS} $*"
131 export CXXFLAGS="${CXXFLAGS} $*" 142 export CXXFLAGS="${CXXFLAGS} $*"
132 [ -n "`is-flag -fno-stack-protector`" -o \ 143 [ -n "`is-flag -fno-stack-protector`" -o \
133 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 144 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
134 return 0 145 return 0
153 164
154 return 0 165 return 0
155} 166}
156 167
157replace-cpu-flags() { 168replace-cpu-flags() {
158 local oldcpu newcpu="$1" ; shift 169 local newcpu="$#" ; newcpu="${!newcpu}"
159 for oldcpu in "$@" ; do 170 while [ $# -gt 1 ] ; do
160 # quote to make sure that no globbing is done (particularly on 171 # quote to make sure that no globbing is done (particularly on
161 # ${oldcpu} prior to calling replace-flags 172 # ${oldcpu} prior to calling replace-flags
162 replace-flags "-march=${oldcpu}" "-march=${newcpu}" 173 replace-flags "-march=${1}" "-march=${newcpu}"
163 replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}" 174 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
164 replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}" 175 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
176 shift
165 done 177 done
166 return 0 178 return 0
167} 179}
168 180
169is-flag() { 181is-flag() {
170 local x 182 local x
171 183
172 for x in ${CFLAGS} ${CXXFLAGS} ; do 184 for x in ${CFLAGS} ${CXXFLAGS} ; do
185 # Note this should work with globs like -mcpu=ultrasparc*
173 if [ "${x}" == "$1" ] ; then 186 if [[ ${x} == ${1} ]]; then
174 echo true 187 echo true
175 return 0 188 return 0
176 fi 189 fi
177 done 190 done
178 return 1 191 return 1
221 set -f # disable pathname expansion 234 set -f # disable pathname expansion
222 235
223 for x in ${CFLAGS}; do 236 for x in ${CFLAGS}; do
224 for y in ${ALLOWED_FLAGS}; do 237 for y in ${ALLOWED_FLAGS}; do
225 flag=${x%%=*} 238 flag=${x%%=*}
226 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then 239 if [ "${flag%%${y}}" = "" ] ; then
227 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 240 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
228 break 241 break
229 fi 242 fi
230 done 243 done
231 done 244 done
232 245
233 for x in ${CXXFLAGS}; do 246 for x in ${CXXFLAGS}; do
234 for y in ${ALLOWED_FLAGS}; do 247 for y in ${ALLOWED_FLAGS}; do
235 flag=${x%%=*} 248 flag=${x%%=*}
236 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then 249 if [ "${flag%%${y}}" = "" ] ; then
237 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 250 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
238 break 251 break
239 fi 252 fi
240 done 253 done
241 done 254 done
254 export CXXFLAGS="${NEW_CXXFLAGS}" 267 export CXXFLAGS="${NEW_CXXFLAGS}"
255 return 0 268 return 0
256} 269}
257 270
258test_flag() { 271test_flag() {
259 local cc=${CC:-gcc} ; cc=${cc%% *} 272 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
260 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
261 printf "%s\n" "$*" 273 printf "%s\n" "$*"
262 return 0 274 return 0
263 fi 275 fi
264 return 1 276 return 1
265} 277}
266 278
267test_version_info() { 279test_version_info() {
268 local cc=${CC:-gcc} ; cc=${cc%% *}
269 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 280 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
270 return 0 281 return 0
271 else 282 else
272 return 1 283 return 1
273 fi 284 fi
274} 285}
303 done 314 done
304 return 1 315 return 1
305} 316}
306 317
307has_hardened() { 318has_hardened() {
308 test_version_info Hardened 319 test_version_info Hardened && return 0
320 # the specs file wont exist unless gcc has GCC_SPECS support
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
322 return 0
309 return $? 323 return 1
310} 324}
311 325
326# indicate whether PIC is set
312has_pic() { 327has_pic() {
313 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 328 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
314 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 329 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
330 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
315 test_version_info pie && return 0 331 test_version_info pie && return 0
316 return 1 332 return 1
317} 333}
318 334
335# indicate whether PIE is set
319has_pie() { 336has_pie() {
320 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 337 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
321 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 338 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
322 test_version_info pie && return 0 339 [ "$(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) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
323 return 1 342 return 1
324} 343}
325 344
345# indicate whether code for SSP is being generated
326has_ssp() { 346has_ssp() {
347 # note; this matches both -fstack-protector and -fstack-protector-all
327 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 348 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
328 test_version_info ssp && return 0 349 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
329 return 1 350 return 1
330} 351}
331 352
332has_m64() { 353has_m64() {
333 # this doesnt test if the flag is accepted, it tests if the flag 354 # this doesnt test if the flag is accepted, it tests if the flag
334 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 355 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
335 # please dont replace this function with test_flag in some future 356 # please dont replace this function with test_flag in some future
336 # clean-up! 357 # clean-up!
337 temp=`mktemp` 358 local temp="$(emktemp)"
338 echo "int main() { return(0); }" > ${temp}.c 359 echo "int main() { return(0); }" > ${temp}.c
339 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 360 MY_CC=$(tc-getCC)
340 ret=$? 361 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
362 local ret=$?
341 rm -f ${temp}.c 363 rm -f ${temp}.c
342 [ "$ret" != "1" ] && return 0 364 [ "$ret" != "1" ] && return 0
343 return 1 365 return 1
344} 366}
345 367
346has_m32() { 368has_m32() {
347 # this doesnt test if the flag is accepted, it tests if the flag 369 # this doesnt test if the flag is accepted, it tests if the flag
348 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 370 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349 # please dont replace this function with test_flag in some future 371 # please dont replace this function with test_flag in some future
350 # clean-up! 372 # clean-up!
351 temp=`mktemp` 373
374 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
375
376 local temp="$(emktemp)"
352 echo "int main() { return(0); }" > ${temp}.c 377 echo "int main() { return(0); }" > ${temp}.c
353 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 378 MY_CC=$(tc-getCC)
354 ret=$? 379 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
380 local ret=$?
355 rm -f ${temp}.c 381 rm -f ${temp}.c
356 [ "$ret" != "1" ] && return 0 382 [ "$ret" != "1" ] && return 0
357 return 1 383 return 1
358} 384}
359 385
400 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 426 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
401 export LDFLAGS 427 export LDFLAGS
402 return 0 428 return 0
403} 429}
404 430
405etexec-flags() {
406 # if you're not using a hardened compiler you wont need this
407 # PIC/no-pic kludge in the first place.
408 has_hardened || return 0
409
410 if has_pie || has_pic; then
411 [ -z "`is-flag -fno-pic`" ] &&
412 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
413 [ -z "`is-flag -nopie`" ] &&
414 export CFLAGS="${CFLAGS} `test_flag -nopie`"
415 fi
416 return 0
417}
418
419fstack-flags() { 431fstack-flags() {
420 if has_ssp; then 432 if has_ssp; then
421 [ -z "`is-flag -fno-stack-protector`" ] && 433 [ -z "`is-flag -fno-stack-protector`" ] &&
422 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 434 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
423 fi 435 fi
424 return 0 436 return 0
425} 437}
438
439# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
440# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
441# fixes.
442#
443# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
444gcc2-flags() {
445 CFLAGS=${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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