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1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2006 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 1.104 2006/01/14 10:52:12 kevquinn Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.112 2006/11/15 22:17:56 vapier Exp $
4 4#
5# Maintainer: base-system@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#
19# 20#
20#### replace-cpu-flags <old.cpus> <new.cpu> ### 21#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus> 22# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu> 23# with flags that specify <new.cpu>
23# 24#
24#### is-flag <flag> #### 25#### is-flag[q] <flag> ####
25# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
26# Matches only complete a flag 27# Matches only complete a flag
28# q version sets return code but doesn't echo
29#
30#### is-ldflag[q] <flag> ####
31# Returns "true" if flag is set in LDFLAGS
32# Matches only complete a flag
33# q version sets return code but doesn't echo
27# 34#
28#### strip-flags #### 35#### strip-flags ####
29# Strip C[XX]FLAGS of everything except known 36# Strip C[XX]FLAGS of everything except known
30# good options. 37# good options.
31# 38#
49# Add extra flags to your current LDFLAGS 56# Add extra flags to your current LDFLAGS
50# 57#
51#### filter-ldflags <flags> #### 58#### filter-ldflags <flags> ####
52# Remove particular flags from LDFLAGS 59# Remove particular flags from LDFLAGS
53# Matches only complete flags 60# Matches only complete flags
54#
55#### fstack-flags ####
56# hooked function for hardened gcc that appends
57# -fno-stack-protector to {C,CXX,LD}FLAGS
58# when a package is filtering -fstack-protector, -fstack-protector-all
59# notice: modern automatic specs files will also suppress -fstack-protector-all
60# when only -fno-stack-protector is given
61# 61#
62#### bindnow-flags #### 62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker. 63# Returns the flags to enable "now" binding in the current selected linker.
64# 64#
65################ DEPRECATED functions ################ 65################ DEPRECATED functions ################
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 97 export ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
103 fi 104 fi
104 # allow a bunch of flags that negate features / control ABI 105 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 108 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 109 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 110 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 111 -mieee -mieee-with-inexact -mschedule \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 112 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 113 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
115 116
116 # C[XX]FLAGS that we are think is ok, but needs testing 117 # C[XX]FLAGS that we are think is ok, but needs testing
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 118 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 119 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 120 return 0
121}
122
123# inverted filters for hardened compiler. This is trying to unpick
124# the hardened compiler defaults.
125_filter-hardened() {
126 local f
127 for f in "$@" ; do
128 case "${f}" in
129 # Ideally we should only concern ourselves with PIE flags,
130 # not -fPIC or -fpic, but too many places filter -fPIC without
131 # thinking about -fPIE.
132 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
133 gcc-specs-pie || continue
134 is-flagq -nopie || append-flags -nopie;;
135 -fstack-protector)
136 gcc-specs-ssp || continue
137 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
138 -fstack-protector-all)
139 gcc-specs-ssp-to-all || continue
140 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
141 esac
142 done
143}
144
145# Remove occurrences of strings from variable given in $1
146# Strings removed are matched as globs, so for example
147# '-O*' would remove -O1, -O2 etc.
148_filter-var() {
149 local f x VAR VAL
150 declare -a new
151
152 VAR=$1
153 shift
154 eval VAL=\${${VAR}}
155 for f in ${VAL}; do
156 for x in "$@"; do
157 # Note this should work with globs like -O*
158 [[ ${f} == ${x} ]] && continue 2
159 done
160 eval new\[\${\#new\[@]}]=\${f}
161 done
162 eval export ${VAR}=\${new\[*]}
120} 163}
121 164
122filter-flags() { 165filter-flags() {
123 local x f fset 166 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 167 _filter-var CFLAGS "$@"
125 168 _filter-var CXXFLAGS "$@"
126 for x in "$@" ; do
127 case "${x}" in
128 -fPIC|-fpic|-fPIE|-fpie|-pie)
129 append-flags `test_flag -fno-pie`;;
130 -fstack-protector|-fstack-protector-all)
131 fstack-flags;;
132 esac
133 done
134
135 for fset in CFLAGS CXXFLAGS; do
136 # Looping over the flags instead of using a global
137 # substitution ensures that we're working with flag atoms.
138 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags.
140 for f in ${!fset}; do
141 for x in "$@"; do
142 # Note this should work with globs like -O*
143 [[ ${f} == ${x} ]] && continue 2
144 done
145 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
146 done
147 eval export ${fset}=\${new_${fset}\[*]}
148 done
149
150 return 0 169 return 0
151} 170}
152 171
153filter-lfs-flags() { 172filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 173 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
162 181
163append-flags() { 182append-flags() {
164 [[ -z $* ]] && return 0 183 [[ -z $* ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 184 export CFLAGS="${CFLAGS} $*"
166 export CXXFLAGS="${CXXFLAGS} $*" 185 export CXXFLAGS="${CXXFLAGS} $*"
167 [ -n "`is-flag -fno-stack-protector`" -o \
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
169 return 0 186 return 0
170} 187}
171 188
172replace-flags() { 189replace-flags() {
173 [[ $# != 2 ]] \ 190 [[ $# != 2 ]] \
204 shift 221 shift
205 done 222 done
206 return 0 223 return 0
207} 224}
208 225
209is-flag() { 226is-flagq() {
210 local x 227 local x
211 228
212 for x in ${CFLAGS} ${CXXFLAGS} ; do 229 for x in ${CFLAGS} ${CXXFLAGS} ; do
213 # Note this should work with globs like -mcpu=ultrasparc* 230 # Note this should work with globs like -mcpu=ultrasparc*
214 if [[ ${x} == ${1} ]]; then 231 if [[ ${x} == ${1} ]]; then
215 echo true
216 return 0 232 return 0
217 fi 233 fi
218 done 234 done
219 return 1 235 return 1
220} 236}
221 237
238is-flag() {
239 if is-flagq ${1}; then
240 echo true
241 return 0
242 fi
243 return 1
244}
245
246is-ldflagq() {
247 local x
248
249 for x in ${LDFLAGS} ; do
250 # Note this should work with globs like -mcpu=ultrasparc*
251 if [[ ${x} == ${1} ]]; then
252 return 0
253 fi
254 done
255 return 1
256}
257
258is-ldflag() {
259 if is-ldflagq ${1}; then
260 echo true
261 return 0
262 fi
263 return 1
264}
265
222filter-mfpmath() { 266filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 267 local orig_mfpmath new_math prune_math
224 268
225 # save the original -mfpmath flag 269 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 270 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 271 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 272 new_math=$(get-flag mfpmath)
273 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 274 # figure out which math values are to be removed
230 prune_math="" 275 prune_math=""
231 for prune_math in "$@" ; do 276 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 277 new_math=${new_math/ ${prune_math} / }
233 done 278 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 279 new_math=$(echo ${new_math})
280 new_math=${new_math// /,}
235 281
236 if [ -z "${new_math}" ] ; then 282 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 283 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 284 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 285 filter-flags ${orig_mfpmath}
240 else 286 else
241 # if we only want to filter some of the user specified 287 # if we only want to filter some of the user specified
341 387
342# Short-hand that should hopefully work for both C and C++ compiler, but 388# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination. 389# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; } 390test-flags() { test-flags-CC "$@"; }
345 391
346# Deprecated, use test-flags() 392# Depriciated, use test-flags()
347test_flag() { 393test_flag() {
348 ewarn "test_flag: deprecated, please use test-flags()!" >&2 394 ewarn "test_flag: deprecated, please use test-flags()!" >&2
349 395
350 test-flags-CC "$@" 396 test-flags-CC "$@"
351} 397}
402# indicate whether PIC is set 448# indicate whether PIC is set
403has_pic() { 449has_pic() {
404 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 450 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
405 451
406 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 452 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
407 ${CFLAGS/-fpic} != ${CFLAGS} || \ 453 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
408 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]] 454 gcc-specs-pie
409} 455}
410 456
411# DEPRECATED - use gcc-specs-pie from toolchain-funcs 457# DEPRECATED - use gcc-specs-pie from toolchain-funcs
412# indicate whether PIE is set 458# indicate whether PIE is set
413has_pie() { 459has_pie() {
414 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 460 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
415 461
416 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 462 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
417 ${CFLAGS/-fpie} != ${CFLAGS} || \ 463 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
418 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \ 464 gcc-specs-pie
419 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
420 # test PIC while waiting for specs to be updated to generate __PIE__
421} 465}
422 466
423# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 467# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
424# indicate whether code for SSP is being generated for all functions 468# indicate whether code for SSP is being generated for all functions
425has_ssp_all() { 469has_ssp_all() {
426 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 470 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
427 471
428 # note; this matches only -fstack-protector-all 472 # note; this matches only -fstack-protector-all
429 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 473 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
430 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 474 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
431 gcc-specs-ssp 475 gcc-specs-ssp-all
432} 476}
433 477
434# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 478# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
435# indicate whether code for SSP is being generated 479# indicate whether code for SSP is being generated
436has_ssp() { 480has_ssp() {
482 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 526 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
483 for x in ${SPARC64_CPUS}; do 527 for x in ${SPARC64_CPUS}; do
484 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 528 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
485 done 529 done
486 else 530 else
487 for x in ${SPARC64_CPUS}; do 531 for x in ${SPARC64_CPUS}; do
488 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 532 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
489 done 533 done
490 fi 534 fi
491 535
492 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 536 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
493 for x in ${SPARC64_CPUS}; do 537 for x in ${SPARC64_CPUS}; do
494 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 538 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
495 done 539 done
496 else 540 else
497 for x in ${SPARC64_CPUS}; do 541 for x in ${SPARC64_CPUS}; do
498 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 542 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
499 done 543 done
500 fi 544 fi
501 545
502 export CFLAGS CXXFLAGS 546 export CFLAGS CXXFLAGS
503} 547}
504 548
505append-ldflags() { 549append-ldflags() {
550 [[ -z $* ]] && return 0
506 export LDFLAGS="${LDFLAGS} $*" 551 export LDFLAGS="${LDFLAGS} $*"
507 return 0 552 return 0
508} 553}
509 554
555# Remove flags from LDFLAGS - it's up to the ebuild to filter
556# CFLAGS and CXXFLAGS via filter-flags if they need to.
510filter-ldflags() { 557filter-ldflags() {
511 local x 558 _filter-var LDFLAGS "$@"
512
513 # we do this fancy spacing stuff so as to not filter
514 # out part of a flag ... we want flag atoms ! :D
515 LDFLAGS=" ${LDFLAGS} "
516 for x in "$@" ; do
517 LDFLAGS=${LDFLAGS// ${x} / }
518 done
519 [[ -z ${LDFLAGS// } ]] \
520 && LDFLAGS="" \
521 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
522 export LDFLAGS
523 return 0 559 return 0
524} 560}
525 561
526# Turn C style ldflags (-Wl,-foo) into straight ldflags 562# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
563# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
564# to gcc where it needs the '-Wl,'.
527raw-ldflags() { 565raw-ldflags() {
528 local x input="$@" 566 local x input="$@"
529 [[ -z ${input} ]] && input=${LDFLAGS} 567 [[ -z ${input} ]] && input=${LDFLAGS}
530 set -- 568 set --
531 for x in ${input} ; do 569 for x in ${input} ; do
532 x=${x#-Wl,} 570 x=${x#-Wl,}
533 set -- "$@" ${x//,/ } 571 set -- "$@" ${x//,/ }
534 done 572 done
535 echo "$@" 573 echo "$@"
536}
537
538fstack-flags() {
539 if gcc-specs-ssp; then
540 [ -z "`is-flag -fno-stack-protector`" ] &&
541 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
542 fi
543 return 0
544}
545
546# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
547# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
548# fixes.
549#
550# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
551gcc2-flags() {
552 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
553 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
554 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
555 fi
556
557 replace-cpu-flags k6-{2,3} k6
558 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
559
560 replace-cpu-flags pentium-mmx i586
561 replace-cpu-flags pentium{2,3,4} i686
562
563 replace-cpu-flags ev6{7,8} ev6
564
565 export CFLAGS CXXFLAGS
566} 574}
567 575
568# Gets the flags needed for "NOW" binding 576# Gets the flags needed for "NOW" binding
569bindnow-flags() { 577bindnow-flags() {
570 case $($(tc-getLD) -v 2>&1 </dev/null) in 578 case $($(tc-getLD) -v 2>&1 </dev/null) in

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