/[gentoo-x86]/eclass/flag-o-matic.eclass
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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 1.73 2004/10/13 14:11:52 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.84 2005/03/18 03:48:14 vapier Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic 5ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS" 6INHERITED="$INHERITED $ECLASS"
9 7
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
12IUSE="${IUSE} debug" 8IUSE="debug"
13 9
14# need access to emktemp() 10# need access to emktemp()
15inherit eutils 11inherit eutils toolchain-funcs multilib
16 12
17# 13#
18#### filter-flags <flags> #### 14#### filter-flags <flags> ####
19# Remove particular flags from C[XX]FLAGS 15# Remove particular flags from C[XX]FLAGS
20# Matches only complete flags 16# Matches only complete flags
57# Add extra flags to your current LDFLAGS 53# Add extra flags to your current LDFLAGS
58# 54#
59#### filter-ldflags <flags> #### 55#### filter-ldflags <flags> ####
60# Remove particular flags from LDFLAGS 56# Remove particular flags from LDFLAGS
61# Matches only complete flags 57# Matches only complete flags
62#
63#### etexec-flags ####
64# hooked function for hardened gcc that appends
65# -fno-pic to {C,CXX,LD}FLAGS
66# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
67# 58#
68#### fstack-flags #### 59#### fstack-flags ####
69# hooked function for hardened gcc that appends 60# hooked function for hardened gcc that appends
70# -fno-stack-protector to {C,CXX,LD}FLAGS 61# -fno-stack-protector to {C,CXX,LD}FLAGS
71# when a package is filtering -fstack-protector, -fstack-protector-all 62# when a package is filtering -fstack-protector, -fstack-protector-all
73# when only -fno-stack-protector is given 64# when only -fno-stack-protector is given
74# 65#
75 66
76# C[XX]FLAGS that we allow in strip-flags 67# C[XX]FLAGS that we allow in strip-flags
77setup-allowed-flags() { 68setup-allowed-flags() {
78 if [ -z "${ALLOWED_FLAGS}" ] ; then 69 if [[ -z ${ALLOWED_FLAGS} ]] ; then
79 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g" 70 export ALLOWED_FLAGS="-pipe"
80 case "${ARCH}" in 71 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
72 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector"
73 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
74 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
75 case $(tc-arch) in
81 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 76 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
82 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 77 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
83 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 78 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
84 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 79 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
85 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 80 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
81 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
82 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;;
86 esac 83 esac
87 fi 84 fi
88 # allow a bunch of flags that negate features / control ABI 85 # allow a bunch of flags that negate features / control ABI
89 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
90 case "${ARCH}" in 87 case $(tc-arch) in
91 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 88 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
92 esac 89 esac
93 ALLOWED_FLAGS="${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" 90 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
94 91
95 # C[XX]FLAGS that we are think is ok, but needs testing 92 # C[XX]FLAGS that we are think is ok, but needs testing
97 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 94 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
98 return 0 95 return 0
99} 96}
100 97
101filter-flags() { 98filter-flags() {
102 local x f fset 99 local x f fset
103 declare -a new_CFLAGS new_CXXFLAGS 100 declare -a new_CFLAGS new_CXXFLAGS
104 101
105 for x in "$@" ; do 102 for x in "$@" ; do
106 case "${x}" in 103 case "${x}" in
107 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 104 -fPIC|-fpic|-fPIE|-fpie|-pie)
105 append-flags `test_flag -fno-pie`;;
108 -fstack-protector|-fstack-protector-all) fstack-flags;; 106 -fstack-protector|-fstack-protector-all)
107 fstack-flags;;
109 esac 108 esac
110 done 109 done
111 110
112 for fset in CFLAGS CXXFLAGS; do 111 for fset in CFLAGS CXXFLAGS; do
113 # Looping over the flags instead of using a global 112 # Looping over the flags instead of using a global
134append-lfs-flags() { 133append-lfs-flags() {
135 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 134 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 135}
137 136
138append-flags() { 137append-flags() {
138 [[ -z $* ]] && return 0
139 export CFLAGS="${CFLAGS} $*" 139 export CFLAGS="${CFLAGS} $*"
140 export CXXFLAGS="${CXXFLAGS} $*" 140 export CXXFLAGS="${CXXFLAGS} $*"
141 [ -n "`is-flag -fno-stack-protector`" -o \ 141 [ -n "`is-flag -fno-stack-protector`" -o \
142 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 142 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
143 return 0 143 return 0
144} 144}
145 145
146replace-flags() { 146replace-flags() {
147 local f fset 147 local f fset
148 declare -a new_CFLAGS new_CXXFLAGS 148 declare -a new_CFLAGS new_CXXFLAGS
149 149
150 for fset in CFLAGS CXXFLAGS; do 150 for fset in CFLAGS CXXFLAGS; do
151 # Looping over the flags instead of using a global 151 # Looping over the flags instead of using a global
152 # substitution ensures that we're working with flag atoms. 152 # substitution ensures that we're working with flag atoms.
222 222
223 local NEW_CFLAGS="" 223 local NEW_CFLAGS=""
224 local NEW_CXXFLAGS="" 224 local NEW_CXXFLAGS=""
225 225
226 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 226 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
227 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 227 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
228 use debug && einfo "Enabling the use of some unstable flags" 228 use debug && einfo "Enabling the use of some unstable flags"
229 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 229 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
230 fi 230 fi
231 231
232 set -f # disable pathname expansion 232 set -f # disable pathname expansion
265 export CXXFLAGS="${NEW_CXXFLAGS}" 265 export CXXFLAGS="${NEW_CXXFLAGS}"
266 return 0 266 return 0
267} 267}
268 268
269test_flag() { 269test_flag() {
270 local cc=${CC:-gcc} ; cc=${cc%% *}
271 if ${cc} -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 270 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
272 printf "%s\n" "$*" 271 printf "%s\n" "$*"
273 return 0 272 return 0
274 fi 273 fi
275 return 1 274 return 1
276} 275}
277 276
278test_version_info() { 277test_version_info() {
279 local cc=${CC:-gcc} ; cc=${cc%% *}
280 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 278 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
281 return 0 279 return 0
282 else 280 else
283 return 1 281 return 1
284 fi 282 fi
285} 283}
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 319 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
322 return 0 320 return 0
323 return 1 321 return 1
324} 322}
325 323
324# indicate whether PIC is set
326has_pic() { 325has_pic() {
327 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 326 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
328 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 327 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
328 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
329 test_version_info pie && return 0 329 test_version_info pie && return 0
330 return 1 330 return 1
331} 331}
332 332
333# indicate whether PIE is set
333has_pie() { 334has_pie() {
334 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 335 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
335 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 336 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
336 test_version_info pie && return 0 337 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
338 # test PIC while waiting for specs to be updated to generate __PIE__
339 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
337 return 1 340 return 1
338} 341}
339 342
343# indicate whether code for SSP is being generated
340has_ssp() { 344has_ssp() {
345 # note; this matches both -fstack-protector and -fstack-protector-all
341 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 346 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
342 test_version_info ssp && return 0 347 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
343 return 1 348 return 1
344} 349}
345 350
346has_m64() { 351has_m64() {
347 # this doesnt test if the flag is accepted, it tests if the flag 352 # this doesnt test if the flag is accepted, it tests if the flag
348 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 353 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349 # please dont replace this function with test_flag in some future 354 # please dont replace this function with test_flag in some future
350 # clean-up! 355 # clean-up!
351 local temp="$(emktemp)" 356 local temp="$(emktemp)"
352 echo "int main() { return(0); }" > ${temp}.c 357 echo "int main() { return(0); }" > ${temp}.c
358 MY_CC=$(tc-getCC)
353 ${CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 359 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
354 local ret=$? 360 local ret=$?
355 rm -f ${temp}.c 361 rm -f ${temp}.c
356 [ "$ret" != "1" ] && return 0 362 [ "$ret" != "1" ] && return 0
357 return 1 363 return 1
358} 364}
360has_m32() { 366has_m32() {
361 # this doesnt test if the flag is accepted, it tests if the flag 367 # this doesnt test if the flag is accepted, it tests if the flag
362 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 368 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
363 # please dont replace this function with test_flag in some future 369 # please dont replace this function with test_flag in some future
364 # clean-up! 370 # clean-up!
371
372 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
373
365 local temp="$(emktemp)" 374 local temp="$(emktemp)"
366 echo "int main() { return(0); }" > ${temp}.c 375 echo "int main() { return(0); }" > ${temp}.c
376 MY_CC=$(tc-getCC)
367 ${CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 377 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
368 local ret=$? 378 local ret=$?
369 rm -f ${temp}.c 379 rm -f ${temp}.c
370 [ "$ret" != "1" ] && return 0 380 [ "$ret" != "1" ] && return 0
371 return 1 381 return 1
372} 382}
373 383
374replace-sparc64-flags() { 384replace-sparc64-flags() {
375 local SPARC64_CPUS="ultrasparc v9" 385 local SPARC64_CPUS="ultrasparc v9"
376 386
377 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 387 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
378 for x in ${SPARC64_CPUS}; do 388 for x in ${SPARC64_CPUS}; do
379 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 389 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
380 done 390 done
381 else 391 else
382 for x in ${SPARC64_CPUS}; do 392 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 393 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
384 done 394 done
385 fi 395 fi
386 396
387 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 397 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
388 for x in ${SPARC64_CPUS}; do 398 for x in ${SPARC64_CPUS}; do
389 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 399 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
390 done 400 done
391 else 401 else
392 for x in ${SPARC64_CPUS}; do 402 for x in ${SPARC64_CPUS}; do
407 417
408 # we do this fancy spacing stuff so as to not filter 418 # we do this fancy spacing stuff so as to not filter
409 # out part of a flag ... we want flag atoms ! :D 419 # out part of a flag ... we want flag atoms ! :D
410 LDFLAGS=" ${LDFLAGS} " 420 LDFLAGS=" ${LDFLAGS} "
411 for x in "$@" ; do 421 for x in "$@" ; do
412 LDFLAGS="${LDFLAGS// ${x} / }" 422 LDFLAGS=${LDFLAGS// ${x} / }
413 done 423 done
424 [[ -z ${LDFLAGS// } ]] \
425 && LDFLAGS="" \
414 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 426 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
415 export LDFLAGS 427 export LDFLAGS
416 return 0
417}
418
419etexec-flags() {
420 # if you're not using a hardened compiler you wont need this
421 # PIC/no-pic kludge in the first place.
422 has_hardened || return 0
423 # this kludge breaks on amd64, and probably other -fPIC dependant
424 # archs.
425 use amd64 && return 0
426
427 if has_pie || has_pic; then
428 [ -z "`is-flag -fno-pic`" ] &&
429 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
430 [ -z "`is-flag -nopie`" ] &&
431 export CFLAGS="${CFLAGS} `test_flag -nopie`"
432 fi
433 return 0 428 return 0
434} 429}
435 430
436fstack-flags() { 431fstack-flags() {
437 if has_ssp; then 432 if has_ssp; then
438 [ -z "`is-flag -fno-stack-protector`" ] && 433 [ -z "`is-flag -fno-stack-protector`" ] &&
439 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 434 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
440 fi 435 fi
441 return 0 436 return 0
442} 437}
443 438
461 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 456 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
462 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 457 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
463 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 458 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
464 CXXFLAGS=${CXXFLAGS//athlon/i686} 459 CXXFLAGS=${CXXFLAGS//athlon/i686}
465 460
466 if [ "$ARCH" = alpha ]; then 461 if [[ $(tc-arch) == "alpha" ]] ; then
467 CHOST=${CHOST/#alphaev6[78]/alphaev6} 462 CHOST=${CHOST/#alphaev6[78]/alphaev6}
468 CFLAGS=${CFLAGS//ev6[78]/ev6} 463 CFLAGS=${CFLAGS//ev6[78]/ev6}
469 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6} 464 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
470 fi 465 fi
471 466

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