/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.101 Revision 1.117
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 1.101 2006/01/01 01:14:59 swegener Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.117 2007/03/04 21:13:17 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#
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 ################
90# Returns true if the compiler by default or with current CFLAGS 90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions 91# generates stack smash protections for most vulnerable functions
92# 92#
93 93
94# 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
95setup-allowed-flags() { 96setup-allowed-flags() {
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then 97 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 98 export ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 102 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" 103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${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 -fprefetch-loop-arrays" 121 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 122 return 0
123}
124
125# inverted filters for hardened compiler. This is trying to unpick
126# the hardened compiler defaults.
127_filter-hardened() {
128 local f
129 for f in "$@" ; do
130 case "${f}" in
131 # Ideally we should only concern ourselves with PIE flags,
132 # not -fPIC or -fpic, but too many places filter -fPIC without
133 # thinking about -fPIE.
134 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
135 gcc-specs-pie || continue
136 is-flagq -nopie || append-flags -nopie;;
137 -fstack-protector)
138 gcc-specs-ssp || continue
139 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
140 -fstack-protector-all)
141 gcc-specs-ssp-to-all || continue
142 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
143 esac
144 done
145}
146
147# Remove occurrences of strings from variable given in $1
148# Strings removed are matched as globs, so for example
149# '-O*' would remove -O1, -O2 etc.
150_filter-var() {
151 local f x VAR VAL
152 declare -a new
153
154 VAR=$1
155 shift
156 eval VAL=\${${VAR}}
157 for f in ${VAL}; do
158 for x in "$@"; do
159 # Note this should work with globs like -O*
160 [[ ${f} == ${x} ]] && continue 2
161 done
162 eval new\[\${\#new\[@]}]=\${f}
163 done
164 eval export ${VAR}=\${new\[*]}
120} 165}
121 166
122filter-flags() { 167filter-flags() {
123 local x f fset 168 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 169 _filter-var CFLAGS "$@"
125 170 _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 0 171 return 0
151} 172}
152 173
153filter-lfs-flags() { 174filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 175 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
162 183
163append-flags() { 184append-flags() {
164 [[ -z $* ]] && return 0 185 [[ -z $* ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 186 export CFLAGS="${CFLAGS} $*"
166 export CXXFLAGS="${CXXFLAGS} $*" 187 export CXXFLAGS="${CXXFLAGS} $*"
167 [ -n "`is-flag -fno-stack-protector`" -o \
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
169 return 0 188 return 0
170} 189}
171 190
172replace-flags() { 191replace-flags() {
173 [[ $# != 2 ]] \ 192 [[ $# != 2 ]] \
195 214
196replace-cpu-flags() { 215replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 216 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 217 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 218 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 219 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 220 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 221 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 222 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 223 shift
205 done 224 done
206 return 0 225 return 0
207} 226}
208 227
228_is_flagq() {
229 local x
230 for x in ${!1} ; do
231 [[ ${x} == $2 ]] && return 0
232 done
233 return 1
234}
235
236is-flagq() {
237 [[ -n $2 ]] && die "Usage: is-flag <flag>"
238 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
239}
240
209is-flag() { 241is-flag() {
210 local x 242 is-flagq "$@" && echo true
243}
211 244
212 for x in ${CFLAGS} ${CXXFLAGS} ; do 245is-ldflagq() {
213 # Note this should work with globs like -mcpu=ultrasparc* 246 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
214 if [[ ${x} == ${1} ]]; then 247 _is_flagq LDFLAGS $1
215 echo true 248}
216 return 0 249
217 fi 250is-ldflag() {
218 done 251 is-ldflagq "$@" && echo true
219 return 1
220} 252}
221 253
222filter-mfpmath() { 254filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 255 local orig_mfpmath new_math prune_math
224 256
225 # save the original -mfpmath flag 257 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 258 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 259 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 260 new_math=$(get-flag mfpmath)
261 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 262 # figure out which math values are to be removed
230 prune_math="" 263 prune_math=""
231 for prune_math in "$@" ; do 264 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 265 new_math=${new_math/ ${prune_math} / }
233 done 266 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 267 new_math=$(echo ${new_math})
268 new_math=${new_math// /,}
235 269
236 if [ -z "${new_math}" ] ; then 270 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 271 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 272 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 273 filter-flags ${orig_mfpmath}
240 else 274 else
241 # if we only want to filter some of the user specified 275 # if we only want to filter some of the user specified
318 local flags 352 local flags
319 local x 353 local x
320 354
321 shift 355 shift
322 356
323 [[ -z ${comp} ]] && \ 357 [[ -z ${comp} ]] && return 1
324 return 1
325 358
359 x=""
326 for x in "$@" ; do 360 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}" 361 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
328 done 362 done
329 363
330 echo "${flags}" 364 echo "${flags}"
331 365
332 # Just bail if we dont have any flags 366 # Just bail if we dont have any flags
343# its really only present due to the append-flags() abomination. 377# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; } 378test-flags() { test-flags-CC "$@"; }
345 379
346# Depriciated, use test-flags() 380# Depriciated, use test-flags()
347test_flag() { 381test_flag() {
348 addwrite "/dev/stderr"
349 ewarn "test_flag: deprecated, please use test-flags()!" >/dev/stderr 382 ewarn "test_flag: deprecated, please use test-flags()!" >&2
350 383
351 test-flags-CC "$@" 384 test-flags-CC "$@"
352} 385}
353 386
354test_version_info() { 387test_version_info() {
358 return 1 391 return 1
359 fi 392 fi
360} 393}
361 394
362strip-unsupported-flags() { 395strip-unsupported-flags() {
363 local x NEW_CFLAGS NEW_CXXFLAGS 396 export CFLAGS=$(test-flags-CC ${CFLAGS})
364 397 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
365 for x in ${CFLAGS} ; do
366 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
367 done
368 for x in ${CXXFLAGS} ; do
369 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
370 done
371
372 export CFLAGS=${NEW_CFLAGS}
373 export CXXFLAGS=${NEW_CXXFLAGS}
374} 398}
375 399
376get-flag() { 400get-flag() {
377 local f findflag="$1" 401 local f findflag="$1"
378 402
390 return 1 414 return 1
391} 415}
392 416
393# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 417# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
394has_hardened() { 418has_hardened() {
395 addwrite "/dev/stderr"
396 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \ 419 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
397 >/dev/stderr
398 420
399 test_version_info Hardened && return 0 421 test_version_info Hardened && return 0
400 # The specs file wont exist unless gcc has GCC_SPECS support 422 # The specs file wont exist unless gcc has GCC_SPECS support
401 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 423 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
402} 424}
403 425
404# DEPRECATED - use gcc-specs-pie from toolchain-funcs 426# DEPRECATED - use gcc-specs-pie from toolchain-funcs
405# indicate whether PIC is set 427# indicate whether PIC is set
406has_pic() { 428has_pic() {
407 addwrite "/dev/stderr"
408 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr 429 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
409 430
410 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 431 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
411 ${CFLAGS/-fpic} != ${CFLAGS} || \ 432 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
412 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]] 433 gcc-specs-pie
413} 434}
414 435
415# DEPRECATED - use gcc-specs-pie from toolchain-funcs 436# DEPRECATED - use gcc-specs-pie from toolchain-funcs
416# indicate whether PIE is set 437# indicate whether PIE is set
417has_pie() { 438has_pie() {
418 addwrite "/dev/stderr"
419 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >/dev/stderr 439 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
420 440
421 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 441 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
422 ${CFLAGS/-fpie} != ${CFLAGS} || \ 442 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
423 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \ 443 gcc-specs-pie
424 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
425 # test PIC while waiting for specs to be updated to generate __PIE__
426} 444}
427 445
428# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 446# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
429# indicate whether code for SSP is being generated for all functions 447# indicate whether code for SSP is being generated for all functions
430has_ssp_all() { 448has_ssp_all() {
431 addwrite "/dev/stderr"
432 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >/dev/stderr 449 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
433 450
434 # note; this matches only -fstack-protector-all 451 # note; this matches only -fstack-protector-all
435 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 452 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
436 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 453 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
437 gcc-specs-ssp 454 gcc-specs-ssp-all
438} 455}
439 456
440# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 457# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
441# indicate whether code for SSP is being generated 458# indicate whether code for SSP is being generated
442has_ssp() { 459has_ssp() {
443 addwrite "/dev/stderr"
444 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >/dev/stderr 460 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
445 461
446 # note; this matches both -fstack-protector and -fstack-protector-all 462 # note; this matches both -fstack-protector and -fstack-protector-all
447 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 463 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
448 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 464 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
449 gcc-specs-ssp 465 gcc-specs-ssp
489 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 505 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
490 for x in ${SPARC64_CPUS}; do 506 for x in ${SPARC64_CPUS}; do
491 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 507 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
492 done 508 done
493 else 509 else
494 for x in ${SPARC64_CPUS}; do 510 for x in ${SPARC64_CPUS}; do
495 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 511 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
496 done 512 done
497 fi 513 fi
498 514
499 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 515 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
500 for x in ${SPARC64_CPUS}; do 516 for x in ${SPARC64_CPUS}; do
501 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 517 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
502 done 518 done
503 else 519 else
504 for x in ${SPARC64_CPUS}; do 520 for x in ${SPARC64_CPUS}; do
505 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 521 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
506 done 522 done
507 fi 523 fi
508 524
509 export CFLAGS CXXFLAGS 525 export CFLAGS CXXFLAGS
510} 526}
511 527
512append-ldflags() { 528append-ldflags() {
529 [[ -z $* ]] && return 0
513 export LDFLAGS="${LDFLAGS} $*" 530 export LDFLAGS="${LDFLAGS} $*"
514 return 0 531 return 0
515} 532}
516 533
534# Remove flags from LDFLAGS - it's up to the ebuild to filter
535# CFLAGS and CXXFLAGS via filter-flags if they need to.
517filter-ldflags() { 536filter-ldflags() {
518 local x 537 _filter-var LDFLAGS "$@"
538 return 0
539}
519 540
520 # we do this fancy spacing stuff so as to not filter 541# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
521 # out part of a flag ... we want flag atoms ! :D 542# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
522 LDFLAGS=" ${LDFLAGS} " 543# to gcc where it needs the '-Wl,'.
544raw-ldflags() {
545 local x input="$@"
546 [[ -z ${input} ]] && input=${LDFLAGS}
547 set --
523 for x in "$@" ; do 548 for x in ${input} ; do
524 LDFLAGS=${LDFLAGS// ${x} / } 549 x=${x#-Wl,}
550 set -- "$@" ${x//,/ }
525 done 551 done
526 [[ -z ${LDFLAGS// } ]] \ 552 echo "$@"
527 && LDFLAGS="" \
528 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
529 export LDFLAGS
530 return 0
531}
532
533fstack-flags() {
534 if gcc-specs-ssp; then
535 [ -z "`is-flag -fno-stack-protector`" ] &&
536 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
537 fi
538 return 0
539}
540
541# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
542# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
543# fixes.
544#
545# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
546gcc2-flags() {
547 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
548 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
549 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
550 fi
551
552 replace-cpu-flags k6-{2,3} k6
553 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
554
555 replace-cpu-flags pentium-mmx i586
556 replace-cpu-flags pentium{2,3,4} i686
557
558 replace-cpu-flags ev6{7,8} ev6
559
560 export CFLAGS CXXFLAGS
561} 553}
562 554
563# Gets the flags needed for "NOW" binding 555# Gets the flags needed for "NOW" binding
564bindnow-flags() { 556bindnow-flags() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in 557 case $($(tc-getLD) -v 2>&1 </dev/null) in
574 echo "-Wl,-z,now" ;; 566 echo "-Wl,-z,now" ;;
575 esac 567 esac
576 ;; 568 ;;
577 esac 569 esac
578} 570}
571
572
573# Some tests for when we screw with things and want to make
574# sure we didn't break anything
575#TESTS() {
576# CFLAGS="-a -b -c=1"
577# CXXFLAGS="-x -y -z=2"
578# LDFLAGS="-l -m -n=3"
579#
580# die() { exit 1; }
581# (is-flag 1 2 3) && die
582# (is-ldflag 1 2 3) && die
583#
584# is-flagq -l && die
585# is-ldflagq -a && die
586# is-flagq -a || die
587# is-flagq -x || die
588# is-ldflagq -n=* || die
589# is-ldflagq -n && die
590#
591# strip-unsupported-flags
592# [[ ${CFLAGS} == "-c=1" ]] || die
593# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
594#
595# echo "All tests pass"
596#}
597#TESTS

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