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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 1.96 2005/12/08 12:16:12 azarah Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.109 2006/07/16 05:49:47 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 \
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
311test-flag-CC() { test-flag-PROG "CC" "$1"; } 357test-flag-CC() { test-flag-PROG "CC" "$1"; }
312 358
313# Returns true if C++ compiler support given flag 359# Returns true if C++ compiler support given flag
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 360test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
315 361
316test-flags() { 362test-flags-PROG() {
363 local comp=$1
364 local flags
317 local x 365 local x
318 366
367 shift
368
369 [[ -z ${comp} ]] && \
370 return 1
371
319 for x in "$@" ; do 372 for x in "$@" ; do
320 test-flag-CC "${x}" || return 1 373 test-flag-${comp} "${x}" && flags="${flags} ${x}"
321 done 374 done
322 375
323 echo "$@" 376 echo "${flags}"
324 377
325 return 0 378 # Just bail if we dont have any flags
379 [[ -n ${flags} ]]
326} 380}
381
382# Returns (echo's) the given flags supported by the C compiler
383test-flags-CC() { test-flags-PROG "CC" "$@"; }
384
385# Returns (echo's) the given flags supported by the C++ compiler
386test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
387
388# Short-hand that should hopefully work for both C and C++ compiler, but
389# its really only present due to the append-flags() abomination.
390test-flags() { test-flags-CC "$@"; }
327 391
328# Depriciated, use test-flags() 392# Depriciated, use test-flags()
329test_flag() { 393test_flag() {
330 ewarn "test_flag: deprecated, please use test-flags()!" >/dev/stderr 394 ewarn "test_flag: deprecated, please use test-flags()!" >&2
331 395
332 test-flags "$@" 396 test-flags-CC "$@"
333} 397}
334 398
335test_version_info() { 399test_version_info() {
336 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 400 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
337 return 0 401 return 0
371 return 1 435 return 1
372} 436}
373 437
374# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 438# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
375has_hardened() { 439has_hardened() {
376 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \ 440 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
377 >/dev/stderr 441
378
379 test_version_info Hardened && return 0 442 test_version_info Hardened && return 0
380 # The specs file wont exist unless gcc has GCC_SPECS support 443 # The specs file wont exist unless gcc has GCC_SPECS support
381 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 444 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
382} 445}
383 446
384# DEPRECATED - use gcc-specs-pie from toolchain-funcs 447# DEPRECATED - use gcc-specs-pie from toolchain-funcs
385# indicate whether PIC is set 448# indicate whether PIC is set
386has_pic() { 449has_pic() {
387 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr 450 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
388 451
389 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 452 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
390 ${CFLAGS/-fpic} != ${CFLAGS} || \ 453 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
391 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]] 454 gcc-specs-pie
392} 455}
393 456
394# DEPRECATED - use gcc-specs-pie from toolchain-funcs 457# DEPRECATED - use gcc-specs-pie from toolchain-funcs
395# indicate whether PIE is set 458# indicate whether PIE is set
396has_pie() { 459has_pie() {
397 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >/dev/stderr 460 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
398 461
399 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 462 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
400 ${CFLAGS/-fpie} != ${CFLAGS} || \ 463 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
401 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \ 464 gcc-specs-pie
402 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
403 # test PIC while waiting for specs to be updated to generate __PIE__
404} 465}
405 466
406# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 467# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
407# indicate whether code for SSP is being generated for all functions 468# indicate whether code for SSP is being generated for all functions
408has_ssp_all() { 469has_ssp_all() {
409 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >/dev/stderr 470 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
410 471
411 # note; this matches only -fstack-protector-all 472 # note; this matches only -fstack-protector-all
412 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 473 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
413 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 474 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
414 gcc-specs-ssp 475 gcc-specs-ssp-all
415} 476}
416 477
417# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 478# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
418# indicate whether code for SSP is being generated 479# indicate whether code for SSP is being generated
419has_ssp() { 480has_ssp() {
420 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >/dev/stderr 481 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
421 482
422 # note; this matches both -fstack-protector and -fstack-protector-all 483 # note; this matches both -fstack-protector and -fstack-protector-all
423 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 484 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
424 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 485 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
425 gcc-specs-ssp 486 gcc-specs-ssp
426} 487}
428has_m64() { 489has_m64() {
429 # this doesnt test if the flag is accepted, it tests if the flag 490 # this doesnt test if the flag is accepted, it tests if the flag
430 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 491 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
431 # please dont replace this function with test_flag in some future 492 # please dont replace this function with test_flag in some future
432 # clean-up! 493 # clean-up!
433 494
434 local temp="$(emktemp)" 495 local temp="$(emktemp)"
435 echo "int main() { return(0); }" > "${temp}".c 496 echo "int main() { return(0); }" > "${temp}".c
436 MY_CC=$(tc-getCC) 497 MY_CC=$(tc-getCC)
437 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 498 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
438 local ret=$? 499 local ret=$?
458 [[ ${ret} != 1 ]] && return 0 519 [[ ${ret} != 1 ]] && return 0
459 return 1 520 return 1
460} 521}
461 522
462replace-sparc64-flags() { 523replace-sparc64-flags() {
463 local SPARC64_CPUS="ultrasparc v9" 524 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
464 525
465 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 526 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
466 for x in ${SPARC64_CPUS}; do 527 for x in ${SPARC64_CPUS}; do
467 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 528 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
468 done 529 done
484 545
485 export CFLAGS CXXFLAGS 546 export CFLAGS CXXFLAGS
486} 547}
487 548
488append-ldflags() { 549append-ldflags() {
550 [[ -z $* ]] && return 0
489 export LDFLAGS="${LDFLAGS} $*" 551 export LDFLAGS="${LDFLAGS} $*"
490 return 0 552 return 0
491} 553}
492 554
555# Remove flags from LDFLAGS - it's up to the ebuild to filter
556# CFLAGS and CXXFLAGS via filter-flags if they need to.
493filter-ldflags() { 557filter-ldflags() {
494 local x 558 _filter-var LDFLAGS "$@"
559 return 0
560}
495 561
496 # we do this fancy spacing stuff so as to not filter 562# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
497 # out part of a flag ... we want flag atoms ! :D 563# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
498 LDFLAGS=" ${LDFLAGS} " 564# to gcc where it needs the '-Wl,'.
565raw-ldflags() {
566 local x input="$@"
567 [[ -z ${input} ]] && input=${LDFLAGS}
568 set --
499 for x in "$@" ; do 569 for x in ${input} ; do
500 LDFLAGS=${LDFLAGS// ${x} / } 570 x=${x#-Wl,}
571 set -- "$@" ${x//,/ }
501 done 572 done
502 [[ -z ${LDFLAGS// } ]] \ 573 echo "$@"
503 && LDFLAGS="" \
504 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
505 export LDFLAGS
506 return 0
507}
508
509fstack-flags() {
510 if gcc-specs-ssp; then
511 [ -z "`is-flag -fno-stack-protector`" ] &&
512 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
513 fi
514 return 0
515} 574}
516 575
517# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 576# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
518# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 577# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
519# fixes. 578# fixes.

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