/[gentoo-x86]/eclass/flag-o-matic.eclass
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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 1.105 2006/01/22 17:51:27 kevquinn Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.119 2007/05/12 11:45:51 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="${ALLOWED_FLAGS} -fbounds-checking"
100 export ALLOWED_FLAGS="${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="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
102 fi 105 fi
103 # allow a bunch of flags that negate features / control ABI 106 # allow a bunch of flags that negate features / control ABI
104 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
108 -fno-strict-aliasing -fno-bounds-checking"
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 109 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
106 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 110 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
107 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 111 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
108 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 112 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
109 -mieee -mieee-with-inexact \ 113 -mieee -mieee-with-inexact -mschedule \
110 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 114 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
111 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 115 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
112 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 116 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
113 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 117 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
118 -msecure-plt -D*"
114 119
115 # C[XX]FLAGS that we are think is ok, but needs testing 120 # C[XX]FLAGS that we are think is ok, but needs testing
116 # NOTE: currently -Os have issues with gcc3 and K6* arch's 121 # NOTE: currently -Os have issues with gcc3 and K6* arch's
117 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 122 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
118 return 0 123 return 0
119} 124}
120 125
121# inverted filters for hardened compiler. This is trying to unpick 126# inverted filters for hardened compiler. This is trying to unpick
122# the hardened compiler defaults. 127# the hardened compiler defaults.
161} 166}
162 167
163filter-flags() { 168filter-flags() {
164 _filter-hardened "$@" 169 _filter-hardened "$@"
165 _filter-var CFLAGS "$@" 170 _filter-var CFLAGS "$@"
171 _filter-var CPPFLAGS "$@"
166 _filter-var CXXFLAGS "$@" 172 _filter-var CXXFLAGS "$@"
167 return 0 173 return 0
168} 174}
169 175
170filter-lfs-flags() { 176filter-lfs-flags() {
171 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 177 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
172 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 178 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
173} 179}
174 180
181append-cppflags() {
182 [[ -z $* ]] && return 0
183 export CPPFLAGS="${CPPFLAGS} $*"
184 return 0
185}
186
175append-lfs-flags() { 187append-lfs-flags() {
176 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 188 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
177 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 189 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
178} 190}
179 191
180append-flags() { 192append-flags() {
181 [[ -z $* ]] && return 0 193 [[ -z $* ]] && return 0
182 export CFLAGS="${CFLAGS} $*" 194 export CFLAGS="${CFLAGS} $*"
210 222
211replace-cpu-flags() { 223replace-cpu-flags() {
212 local newcpu="$#" ; newcpu="${!newcpu}" 224 local newcpu="$#" ; newcpu="${!newcpu}"
213 while [ $# -gt 1 ] ; do 225 while [ $# -gt 1 ] ; do
214 # quote to make sure that no globbing is done (particularly on 226 # quote to make sure that no globbing is done (particularly on
215 # ${oldcpu} prior to calling replace-flags 227 # ${oldcpu}) prior to calling replace-flags
216 replace-flags "-march=${1}" "-march=${newcpu}" 228 replace-flags "-march=${1}" "-march=${newcpu}"
217 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 229 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
218 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 230 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
219 shift 231 shift
220 done 232 done
221 return 0 233 return 0
222} 234}
223 235
236_is_flagq() {
237 local x
238 for x in ${!1} ; do
239 [[ ${x} == $2 ]] && return 0
240 done
241 return 1
242}
243
224is-flagq() { 244is-flagq() {
225 local x 245 [[ -n $2 ]] && die "Usage: is-flag <flag>"
226 246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
227 for x in ${CFLAGS} ${CXXFLAGS} ; do
228 # Note this should work with globs like -mcpu=ultrasparc*
229 if [[ ${x} == ${1} ]]; then
230 return 0
231 fi
232 done
233 return 1
234} 247}
235 248
236is-flag() { 249is-flag() {
237 if is-flagq ${1}; then 250 is-flagq "$@" && echo true
238 echo true
239 return 0
240 fi
241 return 1
242} 251}
243 252
244is-ldflagq() { 253is-ldflagq() {
245 local x 254 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
246 255 _is_flagq LDFLAGS $1
247 for x in ${LDFLAGS} ; do
248 # Note this should work with globs like -mcpu=ultrasparc*
249 if [[ ${x} == ${1} ]]; then
250 return 0
251 fi
252 done
253 return 1
254} 256}
255 257
256is-ldflag() { 258is-ldflag() {
257 if is-ldflagq ${1}; then 259 is-ldflagq "$@" && echo true
258 echo true
259 return 0
260 fi
261 return 1
262} 260}
263 261
264filter-mfpmath() { 262filter-mfpmath() {
265 local orig_mfpmath new_math prune_math 263 local orig_mfpmath new_math prune_math
266 264
267 # save the original -mfpmath flag 265 # save the original -mfpmath flag
268 orig_mfpmath="`get-flag -mfpmath`" 266 orig_mfpmath=$(get-flag -mfpmath)
269 # get the value of the current -mfpmath flag 267 # get the value of the current -mfpmath flag
270 new_math=" `get-flag mfpmath | tr , ' '` " 268 new_math=$(get-flag mfpmath)
269 new_math=" ${new_math//,/ } "
271 # figure out which math values are to be removed 270 # figure out which math values are to be removed
272 prune_math="" 271 prune_math=""
273 for prune_math in "$@" ; do 272 for prune_math in "$@" ; do
274 new_math="${new_math/ ${prune_math} / }" 273 new_math=${new_math/ ${prune_math} / }
275 done 274 done
276 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 275 new_math=$(echo ${new_math})
276 new_math=${new_math// /,}
277 277
278 if [ -z "${new_math}" ] ; then 278 if [[ -z ${new_math} ]] ; then
279 # if we're removing all user specified math values are 279 # if we're removing all user specified math values are
280 # slated for removal, then we just filter the flag 280 # slated for removal, then we just filter the flag
281 filter-flags ${orig_mfpmath} 281 filter-flags ${orig_mfpmath}
282 else 282 else
283 # if we only want to filter some of the user specified 283 # if we only want to filter some of the user specified
360 local flags 360 local flags
361 local x 361 local x
362 362
363 shift 363 shift
364 364
365 [[ -z ${comp} ]] && \ 365 [[ -z ${comp} ]] && return 1
366 return 1
367 366
367 x=""
368 for x in "$@" ; do 368 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags} ${x}" 369 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
370 done 370 done
371 371
372 echo "${flags}" 372 echo "${flags}"
373 373
374 # Just bail if we dont have any flags 374 # Just bail if we dont have any flags
399 return 1 399 return 1
400 fi 400 fi
401} 401}
402 402
403strip-unsupported-flags() { 403strip-unsupported-flags() {
404 local x NEW_CFLAGS NEW_CXXFLAGS 404 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 405 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
406 for x in ${CFLAGS} ; do
407 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
408 done
409 for x in ${CXXFLAGS} ; do
410 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
411 done
412
413 export CFLAGS=${NEW_CFLAGS}
414 export CXXFLAGS=${NEW_CXXFLAGS}
415} 406}
416 407
417get-flag() { 408get-flag() {
418 local f findflag="$1" 409 local f findflag="$1"
419 410
522 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
523 for x in ${SPARC64_CPUS}; do 514 for x in ${SPARC64_CPUS}; do
524 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 515 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
525 done 516 done
526 else 517 else
527 for x in ${SPARC64_CPUS}; do 518 for x in ${SPARC64_CPUS}; do
528 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 519 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
529 done 520 done
530 fi 521 fi
531 522
532 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 523 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
533 for x in ${SPARC64_CPUS}; do 524 for x in ${SPARC64_CPUS}; do
534 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 525 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
535 done 526 done
536 else 527 else
537 for x in ${SPARC64_CPUS}; do 528 for x in ${SPARC64_CPUS}; do
538 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 529 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
539 done 530 done
540 fi 531 fi
541 532
542 export CFLAGS CXXFLAGS 533 export CFLAGS CXXFLAGS
565 for x in ${input} ; do 556 for x in ${input} ; do
566 x=${x#-Wl,} 557 x=${x#-Wl,}
567 set -- "$@" ${x//,/ } 558 set -- "$@" ${x//,/ }
568 done 559 done
569 echo "$@" 560 echo "$@"
570}
571
572# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
573# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
574# fixes.
575#
576# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
577gcc2-flags() {
578 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
579 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
580 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
581 fi
582
583 replace-cpu-flags k6-{2,3} k6
584 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
585
586 replace-cpu-flags pentium-mmx i586
587 replace-cpu-flags pentium{2,3,4} i686
588
589 replace-cpu-flags ev6{7,8} ev6
590
591 export CFLAGS CXXFLAGS
592} 561}
593 562
594# Gets the flags needed for "NOW" binding 563# Gets the flags needed for "NOW" binding
595bindnow-flags() { 564bindnow-flags() {
596 case $($(tc-getLD) -v 2>&1 </dev/null) in 565 case $($(tc-getLD) -v 2>&1 </dev/null) in
605 echo "-Wl,-z,now" ;; 574 echo "-Wl,-z,now" ;;
606 esac 575 esac
607 ;; 576 ;;
608 esac 577 esac
609} 578}
579
580
581# Some tests for when we screw with things and want to make
582# sure we didn't break anything
583#TESTS() {
584# CFLAGS="-a -b -c=1"
585# CXXFLAGS="-x -y -z=2"
586# LDFLAGS="-l -m -n=3"
587#
588# die() { exit 1; }
589# (is-flag 1 2 3) && die
590# (is-ldflag 1 2 3) && die
591#
592# is-flagq -l && die
593# is-ldflagq -a && die
594# is-flagq -a || die
595# is-flagq -x || die
596# is-ldflagq -n=* || die
597# is-ldflagq -n && die
598#
599# strip-unsupported-flags
600# [[ ${CFLAGS} == "-c=1" ]] || die
601# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
602#
603# echo "All tests pass"
604#}
605#TESTS

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