/[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 1.79 2004/12/25 18:45:56 chriswhite Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.89 2005/07/06 20:23:20 agriffis Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9
10IUSE="debug"
11 5
12# need access to emktemp() 6# need access to emktemp()
13inherit eutils toolchain-funcs 7inherit eutils toolchain-funcs multilib
14 8
15# 9#
16#### filter-flags <flags> #### 10#### filter-flags <flags> ####
17# Remove particular flags from C[XX]FLAGS 11# Remove particular flags from C[XX]FLAGS
18# Matches only complete flags 12# Matches only complete flags
55# Add extra flags to your current LDFLAGS 49# Add extra flags to your current LDFLAGS
56# 50#
57#### filter-ldflags <flags> #### 51#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS 52# Remove particular flags from LDFLAGS
59# Matches only complete flags 53# Matches only complete flags
60#
61#### etexec-flags ####
62# hooked function for hardened gcc that appends
63# -fno-pic to {C,CXX,LD}FLAGS
64# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
65# 54#
66#### fstack-flags #### 55#### fstack-flags ####
67# hooked function for hardened gcc that appends 56# hooked function for hardened gcc that appends
68# -fno-stack-protector to {C,CXX,LD}FLAGS 57# -fno-stack-protector to {C,CXX,LD}FLAGS
69# when a package is filtering -fstack-protector, -fstack-protector-all 58# when a package is filtering -fstack-protector, -fstack-protector-all
70# notice: modern automatic specs files will also suppress -fstack-protector-all 59# notice: modern automatic specs files will also suppress -fstack-protector-all
71# when only -fno-stack-protector is given 60# when only -fno-stack-protector is given
72# 61#
62#### has_pic ####
63# Returns true if the compiler by default or with current CFLAGS
64# builds position-independent code.
65#
66#### has_ssp_all ####
67# Returns true if the compiler by default or with current CFLAGS
68# generates stack smash protections for all functions
69#
70#### has_ssp ####
71# Returns true if the compiler by default or with current CFLAGS
72# generates stack smash protections for most vulnerable functions
73#
73 74
74# C[XX]FLAGS that we allow in strip-flags 75# C[XX]FLAGS that we allow in strip-flags
75setup-allowed-flags() { 76setup-allowed-flags() {
76 if [ -z "${ALLOWED_FLAGS}" ] ; then 77 if [[ -z ${ALLOWED_FLAGS} ]] ; then
77 export ALLOWED_FLAGS="-pipe" 78 export ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 79 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="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
82 case "${ARCH}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
89 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;;
90 esac
91 fi 84 fi
92 # allow a bunch of flags that negate features / control ABI 85 # allow a bunch of flags that negate features / control ABI
93 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
94 case "${ARCH}" in 87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
95 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 88 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
96 esac 89 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
97 ALLOWED_FLAGS="${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 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
91 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
92 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
93 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
98 94
99 # C[XX]FLAGS that we are think is ok, but needs testing 95 # C[XX]FLAGS that we are think is ok, but needs testing
100 # NOTE: currently -Os have issues with gcc3 and K6* arch's 96 # NOTE: currently -Os have issues with gcc3 and K6* arch's
101 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 97 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
102 return 0 98 return 0
103} 99}
104 100
105filter-flags() { 101filter-flags() {
106 local x f fset 102 local x f fset
107 declare -a new_CFLAGS new_CXXFLAGS 103 declare -a new_CFLAGS new_CXXFLAGS
108 104
109 for x in "$@" ; do 105 for x in "$@" ; do
110 case "${x}" in 106 case "${x}" in
111 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 107 -fPIC|-fpic|-fPIE|-fpie|-pie)
108 append-flags `test_flag -fno-pie`;;
112 -fstack-protector|-fstack-protector-all) fstack-flags;; 109 -fstack-protector|-fstack-protector-all)
110 fstack-flags;;
113 esac 111 esac
114 done 112 done
115 113
116 for fset in CFLAGS CXXFLAGS; do 114 for fset in CFLAGS CXXFLAGS; do
117 # Looping over the flags instead of using a global 115 # Looping over the flags instead of using a global
138append-lfs-flags() { 136append-lfs-flags() {
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 137 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140} 138}
141 139
142append-flags() { 140append-flags() {
141 [[ -z $* ]] && return 0
143 export CFLAGS="${CFLAGS} $*" 142 export CFLAGS="${CFLAGS} $*"
144 export CXXFLAGS="${CXXFLAGS} $*" 143 export CXXFLAGS="${CXXFLAGS} $*"
145 [ -n "`is-flag -fno-stack-protector`" -o \ 144 [ -n "`is-flag -fno-stack-protector`" -o \
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 145 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
147 return 0 146 return 0
148} 147}
149 148
150replace-flags() { 149replace-flags() {
151 local f fset 150 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS 151 declare -a new_CFLAGS new_CXXFLAGS
153 152
154 for fset in CFLAGS CXXFLAGS; do 153 for fset in CFLAGS CXXFLAGS; do
155 # Looping over the flags instead of using a global 154 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms. 155 # substitution ensures that we're working with flag atoms.
226 225
227 local NEW_CFLAGS="" 226 local NEW_CFLAGS=""
228 local NEW_CXXFLAGS="" 227 local NEW_CXXFLAGS=""
229 228
230 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 229 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
231 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 230 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
232 use debug && einfo "Enabling the use of some unstable flags"
233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 231 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
234 fi 232 fi
235 233
236 set -f # disable pathname expansion 234 set -f # disable pathname expansion
237 235
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
324 return 0 322 return 0
325 return 1 323 return 1
326} 324}
327 325
326# indicate whether PIC is set
328has_pic() { 327has_pic() {
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 328 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 329 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331 test_version_info pie && return 0 330 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
332 return 1 331 return 1
333} 332}
334 333
334# indicate whether PIE is set
335has_pie() { 335has_pie() {
336 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 336 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
337 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 337 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
338 test_version_info pie && return 0 338 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
339 # test PIC while waiting for specs to be updated to generate __PIE__
340 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
339 return 1 341 return 1
340} 342}
341 343
344# indicate whether code for SSP is being generated for all functions
345has_ssp_all() {
346 # note; this matches only -fstack-protector-all
347 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
348 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
349 return 1
350}
351
352# indicate whether code for SSP is being generated
342has_ssp() { 353has_ssp() {
354 # note; this matches both -fstack-protector and -fstack-protector-all
343 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 355 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
344 test_version_info ssp && return 0 356 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
345 return 1 357 return 1
346} 358}
347 359
348has_m64() { 360has_m64() {
349 # this doesnt test if the flag is accepted, it tests if the flag 361 # this doesnt test if the flag is accepted, it tests if the flag
363has_m32() { 375has_m32() {
364 # this doesnt test if the flag is accepted, it tests if the flag 376 # this doesnt test if the flag is accepted, it tests if the flag
365 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 377 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
366 # please dont replace this function with test_flag in some future 378 # please dont replace this function with test_flag in some future
367 # clean-up! 379 # clean-up!
380
381 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
382
368 local temp="$(emktemp)" 383 local temp="$(emktemp)"
369 echo "int main() { return(0); }" > ${temp}.c 384 echo "int main() { return(0); }" > ${temp}.c
370 MY_CC=$(tc-getCC) 385 MY_CC=$(tc-getCC)
371 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 386 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
372 local ret=$? 387 local ret=$?
376} 391}
377 392
378replace-sparc64-flags() { 393replace-sparc64-flags() {
379 local SPARC64_CPUS="ultrasparc v9" 394 local SPARC64_CPUS="ultrasparc v9"
380 395
381 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 396 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
382 for x in ${SPARC64_CPUS}; do 397 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 398 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
384 done 399 done
385 else 400 else
386 for x in ${SPARC64_CPUS}; do 401 for x in ${SPARC64_CPUS}; do
387 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 402 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
388 done 403 done
389 fi 404 fi
390 405
391 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 406 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
392 for x in ${SPARC64_CPUS}; do 407 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 408 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
394 done 409 done
395 else 410 else
396 for x in ${SPARC64_CPUS}; do 411 for x in ${SPARC64_CPUS}; do
411 426
412 # we do this fancy spacing stuff so as to not filter 427 # we do this fancy spacing stuff so as to not filter
413 # out part of a flag ... we want flag atoms ! :D 428 # out part of a flag ... we want flag atoms ! :D
414 LDFLAGS=" ${LDFLAGS} " 429 LDFLAGS=" ${LDFLAGS} "
415 for x in "$@" ; do 430 for x in "$@" ; do
416 LDFLAGS="${LDFLAGS// ${x} / }" 431 LDFLAGS=${LDFLAGS// ${x} / }
417 done 432 done
433 [[ -z ${LDFLAGS// } ]] \
434 && LDFLAGS="" \
418 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 435 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
419 export LDFLAGS 436 export LDFLAGS
420 return 0
421}
422
423etexec-flags() {
424 # if you're not using a hardened compiler you wont need this
425 # PIC/no-pic kludge in the first place.
426 has_hardened || return 0
427 use amd64 && return 0
428 use mips && return 0
429
430 if has_pie || has_pic; then
431 [ -z "`is-flag -fno-pic`" ] &&
432 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
433 [ -z "`is-flag -nopie`" ] &&
434 export CFLAGS="${CFLAGS} `test_flag -nopie`"
435 fi
436 return 0 437 return 0
437} 438}
438 439
439fstack-flags() { 440fstack-flags() {
440 if has_ssp; then 441 if has_ssp; then
441 [ -z "`is-flag -fno-stack-protector`" ] && 442 [ -z "`is-flag -fno-stack-protector`" ] &&
442 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 443 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
443 fi 444 fi
444 return 0 445 return 0
445} 446}
446 447
448# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 449# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
449# fixes. 450# fixes.
450# 451#
451# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 452# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
452gcc2-flags() { 453gcc2-flags() {
453 CFLAGS=${CFLAGS//pentium-mmx/i586} 454 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
454 CFLAGS=${CFLAGS//pentium[234]/i686} 455 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
455 CFLAGS=${CFLAGS//k6-[23]/k6} 456 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
456 CFLAGS=${CFLAGS//athlon-tbird/i686}
457 CFLAGS=${CFLAGS//athlon-4/i686}
458 CFLAGS=${CFLAGS//athlon-[xm]p/i686}
459 CFLAGS=${CFLAGS//athlon/i686}
460
461 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
462 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
463 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
464 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
465 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
466 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
467 CXXFLAGS=${CXXFLAGS//athlon/i686}
468
469 if [ "$ARCH" = alpha ]; then
470 CHOST=${CHOST/#alphaev6[78]/alphaev6}
471 CFLAGS=${CFLAGS//ev6[78]/ev6}
472 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
473 fi 457 fi
458
459 replace-cpu-flags k6-{2,3} k6
460 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
461
462 replace-cpu-flags pentium-mmx i586
463 replace-cpu-flags pentium{2,3,4} i686
464
465 replace-cpu-flags ev6{7,8} ev6
474 466
475 export CFLAGS CXXFLAGS 467 export CFLAGS CXXFLAGS
476} 468}

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