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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 1.67 2004/08/07 04:24:41 agriffis 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"
9
10# need access to emktemp()
11inherit eutils toolchain-funcs multilib
13 12
14# 13#
15#### filter-flags <flags> #### 14#### filter-flags <flags> ####
16# Remove particular flags from C[XX]FLAGS 15# Remove particular flags from C[XX]FLAGS
17# Matches only complete flags 16# Matches only complete flags
20# Add extra flags to your current C[XX]FLAGS 19# Add extra flags to your current C[XX]FLAGS
21# 20#
22#### replace-flags <orig.flag> <new.flag> ### 21#### replace-flags <orig.flag> <new.flag> ###
23# Replace a flag by another one 22# Replace a flag by another one
24# 23#
25#### replace-cpu-flags <new.cpu> <old.cpus> ### 24#### replace-cpu-flags <old.cpus> <new.cpu> ###
26# Replace march/mcpu flags that specify <old.cpus> 25# Replace march/mcpu flags that specify <old.cpus>
27# with flags that specify <new.cpu> 26# with flags that specify <new.cpu>
28# 27#
29#### is-flag <flag> #### 28#### is-flag <flag> ####
30# Returns "true" if flag is set in C[XX]FLAGS 29# Returns "true" if flag is set in C[XX]FLAGS
54# Add extra flags to your current LDFLAGS 53# Add extra flags to your current LDFLAGS
55# 54#
56#### filter-ldflags <flags> #### 55#### filter-ldflags <flags> ####
57# Remove particular flags from LDFLAGS 56# Remove particular flags from LDFLAGS
58# Matches only complete flags 57# 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# 58#
65#### fstack-flags #### 59#### fstack-flags ####
66# hooked function for hardened gcc that appends 60# hooked function for hardened gcc that appends
67# -fno-stack-protector to {C,CXX,LD}FLAGS 61# -fno-stack-protector to {C,CXX,LD}FLAGS
68# when a package is filtering -fstack-protector, -fstack-protector-all 62# when a package is filtering -fstack-protector, -fstack-protector-all
69# notice: modern automatic specs files will also suppress -fstack-protector-all 63# notice: modern automatic specs files will also suppress -fstack-protector-all
70# when only -fno-stack-protector is given 64# when only -fno-stack-protector is given
71# 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#
72 78
73# C[XX]FLAGS that we allow in strip-flags 79# C[XX]FLAGS that we allow in strip-flags
74setup-allowed-flags() { 80setup-allowed-flags() {
75 if [ -z "${ALLOWED_FLAGS}" ] ; then 81 if [[ -z ${ALLOWED_FLAGS} ]] ; then
76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 82 export ALLOWED_FLAGS="-pipe"
77 case "${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 $(tc-arch) in
78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 88 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 89 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 90 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 91 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 92 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
93 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
94 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;;
83 esac 95 esac
84 fi 96 fi
85 # allow a bunch of flags that negate features / control ABI 97 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 98 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
87 case "${ARCH}" in 99 case $(tc-arch) in
88 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 100 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
89 esac 101 esac
90 ALLOWED_FLAGS="${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" 102 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
91 103
92 # C[XX]FLAGS that we are think is ok, but needs testing 104 # C[XX]FLAGS that we are think is ok, but needs testing
94 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 106 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
95 return 0 107 return 0
96} 108}
97 109
98filter-flags() { 110filter-flags() {
99 local x f fset 111 local x f fset
100 declare -a new_CFLAGS new_CXXFLAGS 112 declare -a new_CFLAGS new_CXXFLAGS
101 113
102 for x in "$@" ; do 114 for x in "$@" ; do
103 case "${x}" in 115 case "${x}" in
104 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 116 -fPIC|-fpic|-fPIE|-fpie|-pie)
117 append-flags `test_flag -fno-pie`;;
105 -fstack-protector|-fstack-protector-all) fstack-flags;; 118 -fstack-protector|-fstack-protector-all)
119 fstack-flags;;
106 esac 120 esac
107 done 121 done
108 122
109 for fset in CFLAGS CXXFLAGS; do 123 for fset in CFLAGS CXXFLAGS; do
110 # Looping over the flags instead of using a global 124 # Looping over the flags instead of using a global
131append-lfs-flags() { 145append-lfs-flags() {
132 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
133} 147}
134 148
135append-flags() { 149append-flags() {
150 [[ -z $* ]] && return 0
136 export CFLAGS="${CFLAGS} $*" 151 export CFLAGS="${CFLAGS} $*"
137 export CXXFLAGS="${CXXFLAGS} $*" 152 export CXXFLAGS="${CXXFLAGS} $*"
138 [ -n "`is-flag -fno-stack-protector`" -o \ 153 [ -n "`is-flag -fno-stack-protector`" -o \
139 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 154 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
140 return 0 155 return 0
141} 156}
142 157
143replace-flags() { 158replace-flags() {
144 local f fset 159 local f fset
145 declare -a new_CFLAGS new_CXXFLAGS 160 declare -a new_CFLAGS new_CXXFLAGS
146 161
147 for fset in CFLAGS CXXFLAGS; do 162 for fset in CFLAGS CXXFLAGS; do
148 # Looping over the flags instead of using a global 163 # Looping over the flags instead of using a global
149 # substitution ensures that we're working with flag atoms. 164 # substitution ensures that we're working with flag atoms.
159 174
160 return 0 175 return 0
161} 176}
162 177
163replace-cpu-flags() { 178replace-cpu-flags() {
164 local oldcpu newcpu="$1" ; shift 179 local newcpu="$#" ; newcpu="${!newcpu}"
165 for oldcpu in "$@" ; do 180 while [ $# -gt 1 ] ; do
166 # quote to make sure that no globbing is done (particularly on 181 # quote to make sure that no globbing is done (particularly on
167 # ${oldcpu} prior to calling replace-flags 182 # ${oldcpu} prior to calling replace-flags
168 replace-flags "-march=${oldcpu}" "-march=${newcpu}" 183 replace-flags "-march=${1}" "-march=${newcpu}"
169 replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}" 184 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
170 replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}" 185 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
186 shift
171 done 187 done
172 return 0 188 return 0
173} 189}
174 190
175is-flag() { 191is-flag() {
218 234
219 local NEW_CFLAGS="" 235 local NEW_CFLAGS=""
220 local NEW_CXXFLAGS="" 236 local NEW_CXXFLAGS=""
221 237
222 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 238 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
223 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 239 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
224 use debug && einfo "Enabling the use of some unstable flags" 240 use debug && einfo "Enabling the use of some unstable flags"
225 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 241 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
226 fi 242 fi
227 243
228 set -f # disable pathname expansion 244 set -f # disable pathname expansion
261 export CXXFLAGS="${NEW_CXXFLAGS}" 277 export CXXFLAGS="${NEW_CXXFLAGS}"
262 return 0 278 return 0
263} 279}
264 280
265test_flag() { 281test_flag() {
266 local cc=${CC:-gcc} ; cc=${cc%% *} 282 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
267 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
268 printf "%s\n" "$*" 283 printf "%s\n" "$*"
269 return 0 284 return 0
270 fi 285 fi
271 return 1 286 return 1
272} 287}
273 288
274test_version_info() { 289test_version_info() {
275 local cc=${CC:-gcc} ; cc=${cc%% *}
276 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 290 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
277 return 0 291 return 0
278 else 292 else
279 return 1 293 return 1
280 fi 294 fi
281} 295}
310 done 324 done
311 return 1 325 return 1
312} 326}
313 327
314has_hardened() { 328has_hardened() {
315 test_version_info Hardened 329 test_version_info Hardened && return 0
330 # the specs file wont exist unless gcc has GCC_SPECS support
331 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
332 return 0
316 return $? 333 return 1
317} 334}
318 335
336# indicate whether PIC is set
319has_pic() { 337has_pic() {
320 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 338 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
321 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 339 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
322 test_version_info pie && return 0 340 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
323 return 1 341 return 1
324} 342}
325 343
344# indicate whether PIE is set
326has_pie() { 345has_pie() {
327 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 346 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
328 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 347 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
329 test_version_info pie && return 0 348 [ "$(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) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
330 return 1 351 return 1
331} 352}
332 353
354# indicate whether code for SSP is being generated for all functions
355has_ssp_all() {
356 # note; this matches only -fstack-protector-all
357 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
358 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
359 return 1
360}
361
362# indicate whether code for SSP is being generated
333has_ssp() { 363has_ssp() {
364 # note; this matches both -fstack-protector and -fstack-protector-all
334 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 365 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
335 test_version_info ssp && return 0 366 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
336 return 1 367 return 1
337} 368}
338 369
339has_m64() { 370has_m64() {
340 # this doesnt test if the flag is accepted, it tests if the flag 371 # this doesnt test if the flag is accepted, it tests if the flag
341 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 372 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
342 # please dont replace this function with test_flag in some future 373 # please dont replace this function with test_flag in some future
343 # clean-up! 374 # clean-up!
344 temp=`mktemp` 375 local temp="$(emktemp)"
345 echo "int main() { return(0); }" > ${temp}.c 376 echo "int main() { return(0); }" > ${temp}.c
346 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 377 MY_CC=$(tc-getCC)
347 ret=$? 378 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
379 local ret=$?
348 rm -f ${temp}.c 380 rm -f ${temp}.c
349 [ "$ret" != "1" ] && return 0 381 [ "$ret" != "1" ] && return 0
350 return 1 382 return 1
351} 383}
352 384
353has_m32() { 385has_m32() {
354 # this doesnt test if the flag is accepted, it tests if the flag 386 # this doesnt test if the flag is accepted, it tests if the flag
355 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 387 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
356 # please dont replace this function with test_flag in some future 388 # please dont replace this function with test_flag in some future
357 # clean-up! 389 # clean-up!
358 temp=`mktemp` 390
391 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
392
393 local temp="$(emktemp)"
359 echo "int main() { return(0); }" > ${temp}.c 394 echo "int main() { return(0); }" > ${temp}.c
360 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 395 MY_CC=$(tc-getCC)
361 ret=$? 396 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
397 local ret=$?
362 rm -f ${temp}.c 398 rm -f ${temp}.c
363 [ "$ret" != "1" ] && return 0 399 [ "$ret" != "1" ] && return 0
364 return 1 400 return 1
365} 401}
366 402
367replace-sparc64-flags() { 403replace-sparc64-flags() {
368 local SPARC64_CPUS="ultrasparc v9" 404 local SPARC64_CPUS="ultrasparc v9"
369 405
370 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 406 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
371 for x in ${SPARC64_CPUS}; do 407 for x in ${SPARC64_CPUS}; do
372 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 408 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
373 done 409 done
374 else 410 else
375 for x in ${SPARC64_CPUS}; do 411 for x in ${SPARC64_CPUS}; do
376 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 412 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
377 done 413 done
378 fi 414 fi
379 415
380 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 416 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
381 for x in ${SPARC64_CPUS}; do 417 for x in ${SPARC64_CPUS}; do
382 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 418 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
383 done 419 done
384 else 420 else
385 for x in ${SPARC64_CPUS}; do 421 for x in ${SPARC64_CPUS}; do
400 436
401 # we do this fancy spacing stuff so as to not filter 437 # we do this fancy spacing stuff so as to not filter
402 # out part of a flag ... we want flag atoms ! :D 438 # out part of a flag ... we want flag atoms ! :D
403 LDFLAGS=" ${LDFLAGS} " 439 LDFLAGS=" ${LDFLAGS} "
404 for x in "$@" ; do 440 for x in "$@" ; do
405 LDFLAGS="${LDFLAGS// ${x} / }" 441 LDFLAGS=${LDFLAGS// ${x} / }
406 done 442 done
443 [[ -z ${LDFLAGS// } ]] \
444 && LDFLAGS="" \
407 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 445 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
408 export LDFLAGS 446 export LDFLAGS
409 return 0
410}
411
412etexec-flags() {
413 # if you're not using a hardened compiler you wont need this
414 # PIC/no-pic kludge in the first place.
415 has_hardened || return 0
416 # this kludge breaks on amd64, and probably other -fPIC dependant
417 # archs.
418 use amd64 && return 0
419
420 if has_pie || has_pic; then
421 [ -z "`is-flag -fno-pic`" ] &&
422 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
423 [ -z "`is-flag -nopie`" ] &&
424 export CFLAGS="${CFLAGS} `test_flag -nopie`"
425 fi
426 return 0 447 return 0
427} 448}
428 449
429fstack-flags() { 450fstack-flags() {
430 if has_ssp; then 451 if has_ssp; then
431 [ -z "`is-flag -fno-stack-protector`" ] && 452 [ -z "`is-flag -fno-stack-protector`" ] &&
432 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 453 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
433 fi 454 fi
434 return 0 455 return 0
435} 456}
457
458# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
459# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
460# fixes.
461#
462# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
463gcc2-flags() {
464 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
465 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
466 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
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
476
477 export CFLAGS CXXFLAGS
478}

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