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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 1.89 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
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
12IUSE="${IUSE} debug"
13 5
14# need access to emktemp() 6# need access to emktemp()
15inherit eutils 7inherit eutils toolchain-funcs multilib
16 8
17# 9#
18#### filter-flags <flags> #### 10#### filter-flags <flags> ####
19# Remove particular flags from C[XX]FLAGS 11# Remove particular flags from C[XX]FLAGS
20# Matches only complete flags 12# Matches only complete flags
57# Add extra flags to your current LDFLAGS 49# Add extra flags to your current LDFLAGS
58# 50#
59#### filter-ldflags <flags> #### 51#### filter-ldflags <flags> ####
60# Remove particular flags from LDFLAGS 52# Remove particular flags from LDFLAGS
61# Matches only complete flags 53# 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# 54#
68#### fstack-flags #### 55#### fstack-flags ####
69# hooked function for hardened gcc that appends 56# hooked function for hardened gcc that appends
70# -fno-stack-protector to {C,CXX,LD}FLAGS 57# -fno-stack-protector to {C,CXX,LD}FLAGS
71# when a package is filtering -fstack-protector, -fstack-protector-all 58# when a package is filtering -fstack-protector, -fstack-protector-all
72# notice: modern automatic specs files will also suppress -fstack-protector-all 59# notice: modern automatic specs files will also suppress -fstack-protector-all
73# when only -fno-stack-protector is given 60# when only -fno-stack-protector is given
74# 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#
75 74
76# C[XX]FLAGS that we allow in strip-flags 75# C[XX]FLAGS that we allow in strip-flags
77setup-allowed-flags() { 76setup-allowed-flags() {
78 if [ -z "${ALLOWED_FLAGS}" ] ; then 77 if [[ -z ${ALLOWED_FLAGS} ]] ; then
79 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g" 78 export ALLOWED_FLAGS="-pipe"
80 case "${ARCH}" in 79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
81 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
82 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
83 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
84 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
85 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
86 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 "${ARCH}" in 87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
91 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 88 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
92 esac 89 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
93 ALLOWED_FLAGS="${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 -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"
94 94
95 # 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
96 # NOTE: currently -Os have issues with gcc3 and K6* arch's 96 # NOTE: currently -Os have issues with gcc3 and K6* arch's
97 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 97 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
98 return 0 98 return 0
99} 99}
100 100
101filter-flags() { 101filter-flags() {
102 local x f fset 102 local x f fset
103 declare -a new_CFLAGS new_CXXFLAGS 103 declare -a new_CFLAGS new_CXXFLAGS
104 104
105 for x in "$@" ; do 105 for x in "$@" ; do
106 case "${x}" in 106 case "${x}" in
107 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 107 -fPIC|-fpic|-fPIE|-fpie|-pie)
108 append-flags `test_flag -fno-pie`;;
108 -fstack-protector|-fstack-protector-all) fstack-flags;; 109 -fstack-protector|-fstack-protector-all)
110 fstack-flags;;
109 esac 111 esac
110 done 112 done
111 113
112 for fset in CFLAGS CXXFLAGS; do 114 for fset in CFLAGS CXXFLAGS; do
113 # Looping over the flags instead of using a global 115 # Looping over the flags instead of using a global
134append-lfs-flags() { 136append-lfs-flags() {
135 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
136} 138}
137 139
138append-flags() { 140append-flags() {
141 [[ -z $* ]] && return 0
139 export CFLAGS="${CFLAGS} $*" 142 export CFLAGS="${CFLAGS} $*"
140 export CXXFLAGS="${CXXFLAGS} $*" 143 export CXXFLAGS="${CXXFLAGS} $*"
141 [ -n "`is-flag -fno-stack-protector`" -o \ 144 [ -n "`is-flag -fno-stack-protector`" -o \
142 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 145 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
143 return 0 146 return 0
144} 147}
145 148
146replace-flags() { 149replace-flags() {
147 local f fset 150 local f fset
148 declare -a new_CFLAGS new_CXXFLAGS 151 declare -a new_CFLAGS new_CXXFLAGS
149 152
150 for fset in CFLAGS CXXFLAGS; do 153 for fset in CFLAGS CXXFLAGS; do
151 # Looping over the flags instead of using a global 154 # Looping over the flags instead of using a global
152 # substitution ensures that we're working with flag atoms. 155 # substitution ensures that we're working with flag atoms.
222 225
223 local NEW_CFLAGS="" 226 local NEW_CFLAGS=""
224 local NEW_CXXFLAGS="" 227 local NEW_CXXFLAGS=""
225 228
226 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 229 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
227 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 230 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
228 use debug && einfo "Enabling the use of some unstable flags"
229 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 231 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
230 fi 232 fi
231 233
232 set -f # disable pathname expansion 234 set -f # disable pathname expansion
233 235
265 export CXXFLAGS="${NEW_CXXFLAGS}" 267 export CXXFLAGS="${NEW_CXXFLAGS}"
266 return 0 268 return 0
267} 269}
268 270
269test_flag() { 271test_flag() {
270 local cc=${CC:-gcc} ; cc=${cc%% *}
271 if ${cc} -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 272 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
272 printf "%s\n" "$*" 273 printf "%s\n" "$*"
273 return 0 274 return 0
274 fi 275 fi
275 return 1 276 return 1
276} 277}
277 278
278test_version_info() { 279test_version_info() {
279 local cc=${CC:-gcc} ; cc=${cc%% *}
280 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 280 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
281 return 0 281 return 0
282 else 282 else
283 return 1 283 return 1
284 fi 284 fi
285} 285}
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
322 return 0 322 return 0
323 return 1 323 return 1
324} 324}
325 325
326# indicate whether PIC is set
326has_pic() { 327has_pic() {
327 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 328 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
328 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 329 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
329 test_version_info pie && return 0 330 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
330 return 1 331 return 1
331} 332}
332 333
334# indicate whether PIE is set
333has_pie() { 335has_pie() {
334 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 336 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
335 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 337 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
336 test_version_info pie && return 0 338 [ "$(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) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
337 return 1 341 return 1
338} 342}
339 343
344# indicate whether code for SSP is being generated for all functions
345has_ssp_all() {
346 # note; this matches only -fstack-protector-all
347 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
348 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
349 return 1
350}
351
352# indicate whether code for SSP is being generated
340has_ssp() { 353has_ssp() {
354 # note; this matches both -fstack-protector and -fstack-protector-all
341 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 355 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
342 test_version_info ssp && return 0 356 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
343 return 1 357 return 1
344} 358}
345 359
346has_m64() { 360has_m64() {
347 # this doesnt test if the flag is accepted, it tests if the flag 361 # this doesnt test if the flag is accepted, it tests if the flag
348 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 362 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349 # please dont replace this function with test_flag in some future 363 # please dont replace this function with test_flag in some future
350 # clean-up! 364 # clean-up!
351 local temp="$(emktemp)" 365 local temp="$(emktemp)"
352 echo "int main() { return(0); }" > ${temp}.c 366 echo "int main() { return(0); }" > ${temp}.c
367 MY_CC=$(tc-getCC)
353 ${CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 368 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
354 local ret=$? 369 local ret=$?
355 rm -f ${temp}.c 370 rm -f ${temp}.c
356 [ "$ret" != "1" ] && return 0 371 [ "$ret" != "1" ] && return 0
357 return 1 372 return 1
358} 373}
360has_m32() { 375has_m32() {
361 # this doesnt test if the flag is accepted, it tests if the flag 376 # this doesnt test if the flag is accepted, it tests if the flag
362 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 377 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
363 # please dont replace this function with test_flag in some future 378 # please dont replace this function with test_flag in some future
364 # clean-up! 379 # clean-up!
380
381 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
382
365 local temp="$(emktemp)" 383 local temp="$(emktemp)"
366 echo "int main() { return(0); }" > ${temp}.c 384 echo "int main() { return(0); }" > ${temp}.c
385 MY_CC=$(tc-getCC)
367 ${CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 386 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
368 local ret=$? 387 local ret=$?
369 rm -f ${temp}.c 388 rm -f ${temp}.c
370 [ "$ret" != "1" ] && return 0 389 [ "$ret" != "1" ] && return 0
371 return 1 390 return 1
372} 391}
373 392
374replace-sparc64-flags() { 393replace-sparc64-flags() {
375 local SPARC64_CPUS="ultrasparc v9" 394 local SPARC64_CPUS="ultrasparc v9"
376 395
377 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 396 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
378 for x in ${SPARC64_CPUS}; do 397 for x in ${SPARC64_CPUS}; do
379 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 398 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
380 done 399 done
381 else 400 else
382 for x in ${SPARC64_CPUS}; do 401 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 402 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
384 done 403 done
385 fi 404 fi
386 405
387 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 406 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
388 for x in ${SPARC64_CPUS}; do 407 for x in ${SPARC64_CPUS}; do
389 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 408 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
390 done 409 done
391 else 410 else
392 for x in ${SPARC64_CPUS}; do 411 for x in ${SPARC64_CPUS}; do
407 426
408 # we do this fancy spacing stuff so as to not filter 427 # we do this fancy spacing stuff so as to not filter
409 # out part of a flag ... we want flag atoms ! :D 428 # out part of a flag ... we want flag atoms ! :D
410 LDFLAGS=" ${LDFLAGS} " 429 LDFLAGS=" ${LDFLAGS} "
411 for x in "$@" ; do 430 for x in "$@" ; do
412 LDFLAGS="${LDFLAGS// ${x} / }" 431 LDFLAGS=${LDFLAGS// ${x} / }
413 done 432 done
433 [[ -z ${LDFLAGS// } ]] \
434 && LDFLAGS="" \
414 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 435 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
415 export LDFLAGS 436 export LDFLAGS
416 return 0
417}
418
419etexec-flags() {
420 # if you're not using a hardened compiler you wont need this
421 # PIC/no-pic kludge in the first place.
422 has_hardened || return 0
423 # this kludge breaks on amd64, and probably other -fPIC dependant
424 # archs.
425 use amd64 && return 0
426
427 if has_pie || has_pic; then
428 [ -z "`is-flag -fno-pic`" ] &&
429 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
430 [ -z "`is-flag -nopie`" ] &&
431 export CFLAGS="${CFLAGS} `test_flag -nopie`"
432 fi
433 return 0 437 return 0
434} 438}
435 439
436fstack-flags() { 440fstack-flags() {
437 if has_ssp; then 441 if has_ssp; then
438 [ -z "`is-flag -fno-stack-protector`" ] && 442 [ -z "`is-flag -fno-stack-protector`" ] &&
439 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 443 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
440 fi 444 fi
441 return 0 445 return 0
442} 446}
443 447
445# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 449# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
446# fixes. 450# fixes.
447# 451#
448# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 452# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
449gcc2-flags() { 453gcc2-flags() {
450 CFLAGS=${CFLAGS//pentium-mmx/i586} 454 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
451 CFLAGS=${CFLAGS//pentium[234]/i686} 455 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
452 CFLAGS=${CFLAGS//k6-[23]/k6} 456 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
453 CFLAGS=${CFLAGS//athlon-tbird/i686}
454 CFLAGS=${CFLAGS//athlon-4/i686}
455 CFLAGS=${CFLAGS//athlon-[xm]p/i686}
456 CFLAGS=${CFLAGS//athlon/i686}
457
458 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
459 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
460 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
461 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
462 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
463 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
464 CXXFLAGS=${CXXFLAGS//athlon/i686}
465
466 if [ "$ARCH" = alpha ]; then
467 CHOST=${CHOST/#alphaev6[78]/alphaev6}
468 CFLAGS=${CFLAGS//ev6[78]/ev6}
469 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
470 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
471 466
472 export CFLAGS CXXFLAGS 467 export CFLAGS CXXFLAGS
473} 468}

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