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1# Copyright 1999-2005 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 1.96 2005/12/08 12:16:12 azarah Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.106 2006/02/19 23:18:30 vapier Exp $
4 4
5 5
6# need access to emktemp() 6# need access to emktemp()
7inherit eutils toolchain-funcs multilib 7inherit eutils toolchain-funcs multilib
8 8
19# 19#
20#### replace-cpu-flags <old.cpus> <new.cpu> ### 20#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus> 21# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu> 22# with flags that specify <new.cpu>
23# 23#
24#### is-flag <flag> #### 24#### is-flag[q] <flag> ####
25# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
26# Matches only complete a flag 26# Matches only complete a flag
27# q version sets return code but doesn't echo
28#
29#### is-ldflag[q] <flag> ####
30# Returns "true" if flag is set in LDFLAGS
31# Matches only complete a flag
32# q version sets return code but doesn't echo
27# 33#
28#### strip-flags #### 34#### strip-flags ####
29# Strip C[XX]FLAGS of everything except known 35# Strip C[XX]FLAGS of everything except known
30# good options. 36# good options.
31# 37#
49# Add extra flags to your current LDFLAGS 55# Add extra flags to your current LDFLAGS
50# 56#
51#### filter-ldflags <flags> #### 57#### filter-ldflags <flags> ####
52# Remove particular flags from LDFLAGS 58# Remove particular flags from LDFLAGS
53# Matches only complete flags 59# 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# 60#
62#### bindnow-flags #### 61#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker. 62# Returns the flags to enable "now" binding in the current selected linker.
64# 63#
65################ DEPRECATED functions ################ 64################ DEPRECATED functions ################
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then 95 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 96 export ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 100 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" 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
103 fi 102 fi
104 # allow a bunch of flags that negate features / control ABI 103 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 104 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 112 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 113 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
115 114
116 # C[XX]FLAGS that we are think is ok, but needs testing 115 # C[XX]FLAGS that we are think is ok, but needs testing
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 116 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 117 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 118 return 0
119}
120
121# inverted filters for hardened compiler. This is trying to unpick
122# the hardened compiler defaults.
123_filter-hardened() {
124 local f
125 for f in "$@" ; do
126 case "${f}" in
127 # Ideally we should only concern ourselves with PIE flags,
128 # not -fPIC or -fpic, but too many places filter -fPIC without
129 # thinking about -fPIE.
130 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
131 gcc-specs-pie || continue
132 is-flagq -nopie || append-flags -nopie;;
133 -fstack-protector)
134 gcc-specs-ssp || continue
135 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
136 -fstack-protector-all)
137 gcc-specs-ssp-to-all || continue
138 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
139 esac
140 done
141}
142
143# Remove occurrences of strings from variable given in $1
144# Strings removed are matched as globs, so for example
145# '-O*' would remove -O1, -O2 etc.
146_filter-var() {
147 local f x VAR VAL
148 declare -a new
149
150 VAR=$1
151 shift
152 eval VAL=\${${VAR}}
153 for f in ${VAL}; do
154 for x in "$@"; do
155 # Note this should work with globs like -O*
156 [[ ${f} == ${x} ]] && continue 2
157 done
158 eval new\[\${\#new\[@]}]=\${f}
159 done
160 eval export ${VAR}=\${new\[*]}
120} 161}
121 162
122filter-flags() { 163filter-flags() {
123 local x f fset 164 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 165 _filter-var CFLAGS "$@"
125 166 _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 0 167 return 0
151} 168}
152 169
153filter-lfs-flags() { 170filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 171 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
162 179
163append-flags() { 180append-flags() {
164 [[ -z $* ]] && return 0 181 [[ -z $* ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 182 export CFLAGS="${CFLAGS} $*"
166 export CXXFLAGS="${CXXFLAGS} $*" 183 export CXXFLAGS="${CXXFLAGS} $*"
167 [ -n "`is-flag -fno-stack-protector`" -o \
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
169 return 0 184 return 0
170} 185}
171 186
172replace-flags() { 187replace-flags() {
173 [[ $# != 2 ]] \ 188 [[ $# != 2 ]] \
204 shift 219 shift
205 done 220 done
206 return 0 221 return 0
207} 222}
208 223
209is-flag() { 224is-flagq() {
210 local x 225 local x
211 226
212 for x in ${CFLAGS} ${CXXFLAGS} ; do 227 for x in ${CFLAGS} ${CXXFLAGS} ; do
213 # Note this should work with globs like -mcpu=ultrasparc* 228 # Note this should work with globs like -mcpu=ultrasparc*
214 if [[ ${x} == ${1} ]]; then 229 if [[ ${x} == ${1} ]]; then
215 echo true
216 return 0 230 return 0
217 fi 231 fi
218 done 232 done
233 return 1
234}
235
236is-flag() {
237 if is-flagq ${1}; then
238 echo true
239 return 0
240 fi
241 return 1
242}
243
244is-ldflagq() {
245 local x
246
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}
255
256is-ldflag() {
257 if is-ldflagq ${1}; then
258 echo true
259 return 0
260 fi
219 return 1 261 return 1
220} 262}
221 263
222filter-mfpmath() { 264filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 265 local orig_mfpmath new_math prune_math
311test-flag-CC() { test-flag-PROG "CC" "$1"; } 353test-flag-CC() { test-flag-PROG "CC" "$1"; }
312 354
313# Returns true if C++ compiler support given flag 355# Returns true if C++ compiler support given flag
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 356test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
315 357
316test-flags() { 358test-flags-PROG() {
359 local comp=$1
360 local flags
317 local x 361 local x
318 362
363 shift
364
365 [[ -z ${comp} ]] && \
366 return 1
367
319 for x in "$@" ; do 368 for x in "$@" ; do
320 test-flag-CC "${x}" || return 1 369 test-flag-${comp} "${x}" && flags="${flags} ${x}"
321 done 370 done
322 371
323 echo "$@" 372 echo "${flags}"
324 373
325 return 0 374 # Just bail if we dont have any flags
375 [[ -n ${flags} ]]
326} 376}
377
378# Returns (echo's) the given flags supported by the C compiler
379test-flags-CC() { test-flags-PROG "CC" "$@"; }
380
381# Returns (echo's) the given flags supported by the C++ compiler
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383
384# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; }
327 387
328# Depriciated, use test-flags() 388# Depriciated, use test-flags()
329test_flag() { 389test_flag() {
330 ewarn "test_flag: deprecated, please use test-flags()!" >/dev/stderr 390 ewarn "test_flag: deprecated, please use test-flags()!" >&2
331 391
332 test-flags "$@" 392 test-flags-CC "$@"
333} 393}
334 394
335test_version_info() { 395test_version_info() {
336 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
337 return 0 397 return 0
371 return 1 431 return 1
372} 432}
373 433
374# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 434# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
375has_hardened() { 435has_hardened() {
376 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \ 436 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
377 >/dev/stderr 437
378
379 test_version_info Hardened && return 0 438 test_version_info Hardened && return 0
380 # The specs file wont exist unless gcc has GCC_SPECS support 439 # The specs file wont exist unless gcc has GCC_SPECS support
381 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 440 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
382} 441}
383 442
384# DEPRECATED - use gcc-specs-pie from toolchain-funcs 443# DEPRECATED - use gcc-specs-pie from toolchain-funcs
385# indicate whether PIC is set 444# indicate whether PIC is set
386has_pic() { 445has_pic() {
387 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr 446 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
388 447
389 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 448 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
390 ${CFLAGS/-fpic} != ${CFLAGS} || \ 449 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
391 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]] 450 gcc-specs-pie
392} 451}
393 452
394# DEPRECATED - use gcc-specs-pie from toolchain-funcs 453# DEPRECATED - use gcc-specs-pie from toolchain-funcs
395# indicate whether PIE is set 454# indicate whether PIE is set
396has_pie() { 455has_pie() {
397 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >/dev/stderr 456 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
398 457
399 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 458 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
400 ${CFLAGS/-fpie} != ${CFLAGS} || \ 459 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
401 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \ 460 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} 461}
405 462
406# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 463# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
407# indicate whether code for SSP is being generated for all functions 464# indicate whether code for SSP is being generated for all functions
408has_ssp_all() { 465has_ssp_all() {
409 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >/dev/stderr 466 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
410 467
411 # note; this matches only -fstack-protector-all 468 # note; this matches only -fstack-protector-all
412 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 469 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
413 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 470 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
414 gcc-specs-ssp 471 gcc-specs-ssp-all
415} 472}
416 473
417# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 474# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
418# indicate whether code for SSP is being generated 475# indicate whether code for SSP is being generated
419has_ssp() { 476has_ssp() {
420 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >/dev/stderr 477 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
421 478
422 # note; this matches both -fstack-protector and -fstack-protector-all 479 # note; this matches both -fstack-protector and -fstack-protector-all
423 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 480 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
424 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 481 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
425 gcc-specs-ssp 482 gcc-specs-ssp
426} 483}
428has_m64() { 485has_m64() {
429 # this doesnt test if the flag is accepted, it tests if the flag 486 # this doesnt test if the flag is accepted, it tests if the flag
430 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 487 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
431 # please dont replace this function with test_flag in some future 488 # please dont replace this function with test_flag in some future
432 # clean-up! 489 # clean-up!
433 490
434 local temp="$(emktemp)" 491 local temp="$(emktemp)"
435 echo "int main() { return(0); }" > "${temp}".c 492 echo "int main() { return(0); }" > "${temp}".c
436 MY_CC=$(tc-getCC) 493 MY_CC=$(tc-getCC)
437 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 494 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
438 local ret=$? 495 local ret=$?
458 [[ ${ret} != 1 ]] && return 0 515 [[ ${ret} != 1 ]] && return 0
459 return 1 516 return 1
460} 517}
461 518
462replace-sparc64-flags() { 519replace-sparc64-flags() {
463 local SPARC64_CPUS="ultrasparc v9" 520 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
464 521
465 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 522 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
466 for x in ${SPARC64_CPUS}; do 523 for x in ${SPARC64_CPUS}; do
467 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 524 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
468 done 525 done
484 541
485 export CFLAGS CXXFLAGS 542 export CFLAGS CXXFLAGS
486} 543}
487 544
488append-ldflags() { 545append-ldflags() {
546 [[ -z $* ]] && return 0
489 export LDFLAGS="${LDFLAGS} $*" 547 export LDFLAGS="${LDFLAGS} $*"
490 return 0 548 return 0
491} 549}
492 550
551# Remove flags from LDFLAGS - it's up to the ebuild to filter
552# CFLAGS and CXXFLAGS via filter-flags if they need to.
493filter-ldflags() { 553filter-ldflags() {
494 local x 554 _filter-var LDFLAGS "$@"
555 return 0
556}
495 557
496 # we do this fancy spacing stuff so as to not filter 558# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
497 # out part of a flag ... we want flag atoms ! :D 559# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
498 LDFLAGS=" ${LDFLAGS} " 560# to gcc where it needs the '-Wl,'.
561raw-ldflags() {
562 local x input="$@"
563 [[ -z ${input} ]] && input=${LDFLAGS}
564 set --
499 for x in "$@" ; do 565 for x in ${input} ; do
500 LDFLAGS=${LDFLAGS// ${x} / } 566 x=${x#-Wl,}
567 set -- "$@" ${x//,/ }
501 done 568 done
502 [[ -z ${LDFLAGS// } ]] \ 569 echo "$@"
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} 570}
516 571
517# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 572# 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 573# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
519# fixes. 574# fixes.

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