/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.107 Revision 1.118
1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2007 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 1.107 2006/04/15 00:44:16 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.118 2007/03/24 07:07:18 vapier Exp $
4 4#
5# Maintainer: toolchain@gentoo.org
5 6
6# need access to emktemp() 7# need access to emktemp()
7inherit eutils toolchain-funcs multilib 8inherit eutils toolchain-funcs multilib
8 9
9# 10#
89# Returns true if the compiler by default or with current CFLAGS 90# Returns true if the compiler by default or with current CFLAGS
90# generates stack smash protections for most vulnerable functions 91# generates stack smash protections for most vulnerable functions
91# 92#
92 93
93# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
95# Note: shell globs and character lists are allowed
94setup-allowed-flags() { 96setup-allowed-flags() {
95 if [[ -z ${ALLOWED_FLAGS} ]] ; then 97 if [[ -z ${ALLOWED_FLAGS} ]] ; then
96 export ALLOWED_FLAGS="-pipe" 98 export ALLOWED_FLAGS="-pipe"
97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
103 fi 105 fi
104 # allow a bunch of flags that negate features / control ABI 106 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 108 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 109 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 110 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 111 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 112 -mieee -mieee-with-inexact -mschedule \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 113 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 114 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 115 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 116 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
117 -msecure-plt -D*"
115 118
116 # C[XX]FLAGS that we are think is ok, but needs testing 119 # C[XX]FLAGS that we are think is ok, but needs testing
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 120 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 121 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 122 return 0
162} 165}
163 166
164filter-flags() { 167filter-flags() {
165 _filter-hardened "$@" 168 _filter-hardened "$@"
166 _filter-var CFLAGS "$@" 169 _filter-var CFLAGS "$@"
170 _filter-var CPPFLAGS "$@"
167 _filter-var CXXFLAGS "$@" 171 _filter-var CXXFLAGS "$@"
168 return 0 172 return 0
169} 173}
170 174
171filter-lfs-flags() { 175filter-lfs-flags() {
172 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 176 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
173 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 177 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
174} 178}
175 179
180append-cppflags() {
181 [[ -z $* ]] && return 0
182 export CPPFLAGS="${CPPFLAGS} $*"
183 return 0
184}
185
176append-lfs-flags() { 186append-lfs-flags() {
177 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 187 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
178 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179} 189}
180 190
181append-flags() { 191append-flags() {
182 [[ -z $* ]] && return 0 192 [[ -z $* ]] && return 0
183 export CFLAGS="${CFLAGS} $*" 193 export CFLAGS="${CFLAGS} $*"
211 221
212replace-cpu-flags() { 222replace-cpu-flags() {
213 local newcpu="$#" ; newcpu="${!newcpu}" 223 local newcpu="$#" ; newcpu="${!newcpu}"
214 while [ $# -gt 1 ] ; do 224 while [ $# -gt 1 ] ; do
215 # quote to make sure that no globbing is done (particularly on 225 # quote to make sure that no globbing is done (particularly on
216 # ${oldcpu} prior to calling replace-flags 226 # ${oldcpu}) prior to calling replace-flags
217 replace-flags "-march=${1}" "-march=${newcpu}" 227 replace-flags "-march=${1}" "-march=${newcpu}"
218 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 228 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
219 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 229 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
220 shift 230 shift
221 done 231 done
222 return 0 232 return 0
223} 233}
224 234
235_is_flagq() {
236 local x
237 for x in ${!1} ; do
238 [[ ${x} == $2 ]] && return 0
239 done
240 return 1
241}
242
225is-flagq() { 243is-flagq() {
226 local x 244 [[ -n $2 ]] && die "Usage: is-flag <flag>"
227 245 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
228 for x in ${CFLAGS} ${CXXFLAGS} ; do
229 # Note this should work with globs like -mcpu=ultrasparc*
230 if [[ ${x} == ${1} ]]; then
231 return 0
232 fi
233 done
234 return 1
235} 246}
236 247
237is-flag() { 248is-flag() {
238 if is-flagq ${1}; then 249 is-flagq "$@" && echo true
239 echo true
240 return 0
241 fi
242 return 1
243} 250}
244 251
245is-ldflagq() { 252is-ldflagq() {
246 local x 253 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
247 254 _is_flagq LDFLAGS $1
248 for x in ${LDFLAGS} ; do
249 # Note this should work with globs like -mcpu=ultrasparc*
250 if [[ ${x} == ${1} ]]; then
251 return 0
252 fi
253 done
254 return 1
255} 255}
256 256
257is-ldflag() { 257is-ldflag() {
258 if is-ldflagq ${1}; then 258 is-ldflagq "$@" && echo true
259 echo true
260 return 0
261 fi
262 return 1
263} 259}
264 260
265filter-mfpmath() { 261filter-mfpmath() {
266 local orig_mfpmath new_math prune_math 262 local orig_mfpmath new_math prune_math
267 263
268 # save the original -mfpmath flag 264 # save the original -mfpmath flag
269 orig_mfpmath="`get-flag -mfpmath`" 265 orig_mfpmath=$(get-flag -mfpmath)
270 # get the value of the current -mfpmath flag 266 # get the value of the current -mfpmath flag
271 new_math=" `get-flag mfpmath | tr , ' '` " 267 new_math=$(get-flag mfpmath)
268 new_math=" ${new_math//,/ } "
272 # figure out which math values are to be removed 269 # figure out which math values are to be removed
273 prune_math="" 270 prune_math=""
274 for prune_math in "$@" ; do 271 for prune_math in "$@" ; do
275 new_math="${new_math/ ${prune_math} / }" 272 new_math=${new_math/ ${prune_math} / }
276 done 273 done
277 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 274 new_math=$(echo ${new_math})
275 new_math=${new_math// /,}
278 276
279 if [ -z "${new_math}" ] ; then 277 if [[ -z ${new_math} ]] ; then
280 # if we're removing all user specified math values are 278 # if we're removing all user specified math values are
281 # slated for removal, then we just filter the flag 279 # slated for removal, then we just filter the flag
282 filter-flags ${orig_mfpmath} 280 filter-flags ${orig_mfpmath}
283 else 281 else
284 # if we only want to filter some of the user specified 282 # if we only want to filter some of the user specified
361 local flags 359 local flags
362 local x 360 local x
363 361
364 shift 362 shift
365 363
366 [[ -z ${comp} ]] && \ 364 [[ -z ${comp} ]] && return 1
367 return 1
368 365
366 x=""
369 for x in "$@" ; do 367 for x in "$@" ; do
370 test-flag-${comp} "${x}" && flags="${flags} ${x}" 368 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
371 done 369 done
372 370
373 echo "${flags}" 371 echo "${flags}"
374 372
375 # Just bail if we dont have any flags 373 # Just bail if we dont have any flags
400 return 1 398 return 1
401 fi 399 fi
402} 400}
403 401
404strip-unsupported-flags() { 402strip-unsupported-flags() {
405 local x NEW_CFLAGS NEW_CXXFLAGS 403 export CFLAGS=$(test-flags-CC ${CFLAGS})
406 404 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
407 for x in ${CFLAGS} ; do
408 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
409 done
410 for x in ${CXXFLAGS} ; do
411 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
412 done
413
414 export CFLAGS=${NEW_CFLAGS}
415 export CXXFLAGS=${NEW_CXXFLAGS}
416} 405}
417 406
418get-flag() { 407get-flag() {
419 local f findflag="$1" 408 local f findflag="$1"
420 409
523 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 512 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
524 for x in ${SPARC64_CPUS}; do 513 for x in ${SPARC64_CPUS}; do
525 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 514 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
526 done 515 done
527 else 516 else
528 for x in ${SPARC64_CPUS}; do 517 for x in ${SPARC64_CPUS}; do
529 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 518 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
530 done 519 done
531 fi 520 fi
532 521
533 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 522 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
534 for x in ${SPARC64_CPUS}; do 523 for x in ${SPARC64_CPUS}; do
535 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 524 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
536 done 525 done
537 else 526 else
538 for x in ${SPARC64_CPUS}; do 527 for x in ${SPARC64_CPUS}; do
539 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 528 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
540 done 529 done
541 fi 530 fi
542 531
543 export CFLAGS CXXFLAGS 532 export CFLAGS CXXFLAGS
566 for x in ${input} ; do 555 for x in ${input} ; do
567 x=${x#-Wl,} 556 x=${x#-Wl,}
568 set -- "$@" ${x//,/ } 557 set -- "$@" ${x//,/ }
569 done 558 done
570 echo "$@" 559 echo "$@"
571}
572
573# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
574# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
575# fixes.
576#
577# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
578gcc2-flags() {
579 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
580 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
581 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
582 fi
583
584 replace-cpu-flags k6-{2,3} k6
585 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
586
587 replace-cpu-flags pentium-mmx i586
588 replace-cpu-flags pentium{2,3,4} i686
589
590 replace-cpu-flags ev6{7,8} ev6
591
592 export CFLAGS CXXFLAGS
593} 560}
594 561
595# Gets the flags needed for "NOW" binding 562# Gets the flags needed for "NOW" binding
596bindnow-flags() { 563bindnow-flags() {
597 case $($(tc-getLD) -v 2>&1 </dev/null) in 564 case $($(tc-getLD) -v 2>&1 </dev/null) in
606 echo "-Wl,-z,now" ;; 573 echo "-Wl,-z,now" ;;
607 esac 574 esac
608 ;; 575 ;;
609 esac 576 esac
610} 577}
578
579
580# Some tests for when we screw with things and want to make
581# sure we didn't break anything
582#TESTS() {
583# CFLAGS="-a -b -c=1"
584# CXXFLAGS="-x -y -z=2"
585# LDFLAGS="-l -m -n=3"
586#
587# die() { exit 1; }
588# (is-flag 1 2 3) && die
589# (is-ldflag 1 2 3) && die
590#
591# is-flagq -l && die
592# is-ldflagq -a && die
593# is-flagq -a || die
594# is-flagq -x || die
595# is-ldflagq -n=* || die
596# is-ldflagq -n && die
597#
598# strip-unsupported-flags
599# [[ ${CFLAGS} == "-c=1" ]] || die
600# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
601#
602# echo "All tests pass"
603#}
604#TESTS

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