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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 1.86 2005/04/28 20:06:00 solar 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
72# notice: modern automatic specs files will also suppress -fstack-protector-all 63# notice: modern automatic specs files will also suppress -fstack-protector-all
73# when only -fno-stack-protector is given 64# when only -fno-stack-protector is given
74# 65#
66#### has_pic ####
67# Returns true if the compiler by default or with current CFLAGS
68# builds position-independent code.
69#
70#### has_ssp_all ####
71# Returns true if the compiler by default or with current CFLAGS
72# generates stack smash protections for all functions
73#
74#### has_ssp ####
75# Returns true if the compiler by default or with current CFLAGS
76# generates stack smash protections for most vulnerable functions
77#
75 78
76# C[XX]FLAGS that we allow in strip-flags 79# C[XX]FLAGS that we allow in strip-flags
77setup-allowed-flags() { 80setup-allowed-flags() {
78 if [ -z "${ALLOWED_FLAGS}" ] ; then 81 if [[ -z ${ALLOWED_FLAGS} ]] ; then
79 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g" 82 export ALLOWED_FLAGS="-pipe"
80 case "${ARCH}" in 83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
84 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector"
85 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
86 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
87 case $(tc-arch) in
81 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 88 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
82 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 89 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
83 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 90 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
84 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 91 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
85 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 92 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
93 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
94 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;;
86 esac 95 esac
87 fi 96 fi
88 # allow a bunch of flags that negate features / control ABI 97 # allow a bunch of flags that negate features / control ABI
89 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 98 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
90 case "${ARCH}" in 99 case $(tc-arch) in
91 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 100 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
92 esac 101 esac
93 ALLOWED_FLAGS="${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" 102 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
94 103
95 # C[XX]FLAGS that we are think is ok, but needs testing 104 # C[XX]FLAGS that we are think is ok, but needs testing
97 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 106 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
98 return 0 107 return 0
99} 108}
100 109
101filter-flags() { 110filter-flags() {
102 local x f fset 111 local x f fset
103 declare -a new_CFLAGS new_CXXFLAGS 112 declare -a new_CFLAGS new_CXXFLAGS
104 113
105 for x in "$@" ; do 114 for x in "$@" ; do
106 case "${x}" in 115 case "${x}" in
107 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 116 -fPIC|-fpic|-fPIE|-fpie|-pie)
117 append-flags `test_flag -fno-pie`;;
108 -fstack-protector|-fstack-protector-all) fstack-flags;; 118 -fstack-protector|-fstack-protector-all)
119 fstack-flags;;
109 esac 120 esac
110 done 121 done
111 122
112 for fset in CFLAGS CXXFLAGS; do 123 for fset in CFLAGS CXXFLAGS; do
113 # Looping over the flags instead of using a global 124 # Looping over the flags instead of using a global
134append-lfs-flags() { 145append-lfs-flags() {
135 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 146 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 147}
137 148
138append-flags() { 149append-flags() {
150 [[ -z $* ]] && return 0
139 export CFLAGS="${CFLAGS} $*" 151 export CFLAGS="${CFLAGS} $*"
140 export CXXFLAGS="${CXXFLAGS} $*" 152 export CXXFLAGS="${CXXFLAGS} $*"
141 [ -n "`is-flag -fno-stack-protector`" -o \ 153 [ -n "`is-flag -fno-stack-protector`" -o \
142 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 154 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
143 return 0 155 return 0
144} 156}
145 157
146replace-flags() { 158replace-flags() {
147 local f fset 159 local f fset
148 declare -a new_CFLAGS new_CXXFLAGS 160 declare -a new_CFLAGS new_CXXFLAGS
149 161
150 for fset in CFLAGS CXXFLAGS; do 162 for fset in CFLAGS CXXFLAGS; do
151 # Looping over the flags instead of using a global 163 # Looping over the flags instead of using a global
152 # substitution ensures that we're working with flag atoms. 164 # substitution ensures that we're working with flag atoms.
222 234
223 local NEW_CFLAGS="" 235 local NEW_CFLAGS=""
224 local NEW_CXXFLAGS="" 236 local NEW_CXXFLAGS=""
225 237
226 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 238 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
227 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 239 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
228 use debug && einfo "Enabling the use of some unstable flags" 240 use debug && einfo "Enabling the use of some unstable flags"
229 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 241 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
230 fi 242 fi
231 243
232 set -f # disable pathname expansion 244 set -f # disable pathname expansion
265 export CXXFLAGS="${NEW_CXXFLAGS}" 277 export CXXFLAGS="${NEW_CXXFLAGS}"
266 return 0 278 return 0
267} 279}
268 280
269test_flag() { 281test_flag() {
270 local cc=${CC:-gcc} ; cc=${cc%% *}
271 if ${cc} -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 282 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
272 printf "%s\n" "$*" 283 printf "%s\n" "$*"
273 return 0 284 return 0
274 fi 285 fi
275 return 1 286 return 1
276} 287}
277 288
278test_version_info() { 289test_version_info() {
279 local cc=${CC:-gcc} ; cc=${cc%% *}
280 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 290 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
281 return 0 291 return 0
282 else 292 else
283 return 1 293 return 1
284 fi 294 fi
285} 295}
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 331 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
322 return 0 332 return 0
323 return 1 333 return 1
324} 334}
325 335
336# indicate whether PIC is set
326has_pic() { 337has_pic() {
327 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 338 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
328 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 339 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
329 test_version_info pie && return 0 340 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
330 return 1 341 return 1
331} 342}
332 343
344# indicate whether PIE is set
333has_pie() { 345has_pie() {
334 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 346 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
335 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 347 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
336 test_version_info pie && return 0 348 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
349 # test PIC while waiting for specs to be updated to generate __PIE__
350 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
337 return 1 351 return 1
338} 352}
339 353
354# indicate whether code for SSP is being generated for all functions
355has_ssp_all() {
356 # note; this matches only -fstack-protector-all
357 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
358 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
359 return 1
360}
361
362# indicate whether code for SSP is being generated
340has_ssp() { 363has_ssp() {
364 # note; this matches both -fstack-protector and -fstack-protector-all
341 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 365 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
342 test_version_info ssp && return 0 366 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
343 return 1 367 return 1
344} 368}
345 369
346has_m64() { 370has_m64() {
347 # this doesnt test if the flag is accepted, it tests if the flag 371 # this doesnt test if the flag is accepted, it tests if the flag
348 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 372 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349 # please dont replace this function with test_flag in some future 373 # please dont replace this function with test_flag in some future
350 # clean-up! 374 # clean-up!
351 local temp="$(emktemp)" 375 local temp="$(emktemp)"
352 echo "int main() { return(0); }" > ${temp}.c 376 echo "int main() { return(0); }" > ${temp}.c
377 MY_CC=$(tc-getCC)
353 ${CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 378 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
354 local ret=$? 379 local ret=$?
355 rm -f ${temp}.c 380 rm -f ${temp}.c
356 [ "$ret" != "1" ] && return 0 381 [ "$ret" != "1" ] && return 0
357 return 1 382 return 1
358} 383}
360has_m32() { 385has_m32() {
361 # this doesnt test if the flag is accepted, it tests if the flag 386 # this doesnt test if the flag is accepted, it tests if the flag
362 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 387 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
363 # please dont replace this function with test_flag in some future 388 # please dont replace this function with test_flag in some future
364 # clean-up! 389 # clean-up!
390
391 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
392
365 local temp="$(emktemp)" 393 local temp="$(emktemp)"
366 echo "int main() { return(0); }" > ${temp}.c 394 echo "int main() { return(0); }" > ${temp}.c
395 MY_CC=$(tc-getCC)
367 ${CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 396 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
368 local ret=$? 397 local ret=$?
369 rm -f ${temp}.c 398 rm -f ${temp}.c
370 [ "$ret" != "1" ] && return 0 399 [ "$ret" != "1" ] && return 0
371 return 1 400 return 1
372} 401}
373 402
374replace-sparc64-flags() { 403replace-sparc64-flags() {
375 local SPARC64_CPUS="ultrasparc v9" 404 local SPARC64_CPUS="ultrasparc v9"
376 405
377 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 406 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
378 for x in ${SPARC64_CPUS}; do 407 for x in ${SPARC64_CPUS}; do
379 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 408 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
380 done 409 done
381 else 410 else
382 for x in ${SPARC64_CPUS}; do 411 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 412 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
384 done 413 done
385 fi 414 fi
386 415
387 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 416 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
388 for x in ${SPARC64_CPUS}; do 417 for x in ${SPARC64_CPUS}; do
389 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 418 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
390 done 419 done
391 else 420 else
392 for x in ${SPARC64_CPUS}; do 421 for x in ${SPARC64_CPUS}; do
407 436
408 # we do this fancy spacing stuff so as to not filter 437 # we do this fancy spacing stuff so as to not filter
409 # out part of a flag ... we want flag atoms ! :D 438 # out part of a flag ... we want flag atoms ! :D
410 LDFLAGS=" ${LDFLAGS} " 439 LDFLAGS=" ${LDFLAGS} "
411 for x in "$@" ; do 440 for x in "$@" ; do
412 LDFLAGS="${LDFLAGS// ${x} / }" 441 LDFLAGS=${LDFLAGS// ${x} / }
413 done 442 done
443 [[ -z ${LDFLAGS// } ]] \
444 && LDFLAGS="" \
414 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 445 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
415 export LDFLAGS 446 export LDFLAGS
416 return 0
417}
418
419etexec-flags() {
420 # if you're not using a hardened compiler you wont need this
421 # PIC/no-pic kludge in the first place.
422 has_hardened || return 0
423 # this kludge breaks on amd64, and probably other -fPIC dependant
424 # archs.
425 use amd64 && return 0
426
427 if has_pie || has_pic; then
428 [ -z "`is-flag -fno-pic`" ] &&
429 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
430 [ -z "`is-flag -nopie`" ] &&
431 export CFLAGS="${CFLAGS} `test_flag -nopie`"
432 fi
433 return 0 447 return 0
434} 448}
435 449
436fstack-flags() { 450fstack-flags() {
437 if has_ssp; then 451 if has_ssp; then
438 [ -z "`is-flag -fno-stack-protector`" ] && 452 [ -z "`is-flag -fno-stack-protector`" ] &&
439 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 453 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
440 fi 454 fi
441 return 0 455 return 0
442} 456}
443 457
445# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 459# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
446# fixes. 460# fixes.
447# 461#
448# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 462# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
449gcc2-flags() { 463gcc2-flags() {
450 CFLAGS=${CFLAGS//pentium-mmx/i586} 464 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
451 CFLAGS=${CFLAGS//pentium[234]/i686} 465 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
452 CFLAGS=${CFLAGS//k6-[23]/k6} 466 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 467 fi
468
469 replace-cpu-flags k6-{2,3} k6
470 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
471
472 replace-cpu-flags pentium-mmx i586
473 replace-cpu-flags pentium{2,3,4} i686
474
475 replace-cpu-flags ev6{7,8} ev6
471 476
472 export CFLAGS CXXFLAGS 477 export CFLAGS CXXFLAGS
473} 478}

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