/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.87 Revision 1.106
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 1.87 2005/06/24 22:06:19 vapier 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
5ECLASS=flag-o-matic
6INHERITED="$INHERITED $ECLASS"
7 5
8# need access to emktemp() 6# need access to emktemp()
9inherit eutils toolchain-funcs multilib 7inherit eutils toolchain-funcs multilib
10 8
11# 9#
21# 19#
22#### replace-cpu-flags <old.cpus> <new.cpu> ### 20#### replace-cpu-flags <old.cpus> <new.cpu> ###
23# Replace march/mcpu flags that specify <old.cpus> 21# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu> 22# with flags that specify <new.cpu>
25# 23#
26#### is-flag <flag> #### 24#### is-flag[q] <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
28# 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
29# 33#
30#### strip-flags #### 34#### strip-flags ####
31# Strip C[XX]FLAGS of everything except known 35# Strip C[XX]FLAGS of everything except known
32# good options. 36# good options.
33# 37#
52# 56#
53#### filter-ldflags <flags> #### 57#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS 58# Remove particular flags from LDFLAGS
55# Matches only complete flags 59# Matches only complete flags
56# 60#
57#### fstack-flags #### 61#### bindnow-flags ####
58# hooked function for hardened gcc that appends 62# Returns the flags to enable "now" binding in the current selected linker.
59# -fno-stack-protector to {C,CXX,LD}FLAGS 63#
60# when a package is filtering -fstack-protector, -fstack-protector-all 64################ DEPRECATED functions ################
61# notice: modern automatic specs files will also suppress -fstack-protector-all 65# The following are still present to avoid breaking existing
62# when only -fno-stack-protector is given 66# code more than necessary; however they are deprecated. Please
67# use gcc-specs-* from toolchain-funcs.eclass instead, if you
68# need to know which hardened techs are active in the compiler.
69# See bug #100974
70#
71#### has_hardened ####
72# Returns true if the compiler has 'Hardened' in its version string,
73# (note; switched-spec vanilla compilers satisfy this condition) or
74# the specs file name contains 'hardened'.
75#
76#### has_pie ####
77# Returns true if the compiler by default or with current CFLAGS
78# builds position-independent code.
63# 79#
64#### has_pic #### 80#### has_pic ####
65# Returns true if the compiler by default or with current CFLAGS 81# Returns true if the compiler by default or with current CFLAGS
66# builds position-independent code. 82# builds position-independent code.
67# 83#
79 if [[ -z ${ALLOWED_FLAGS} ]] ; then 95 if [[ -z ${ALLOWED_FLAGS} ]] ; then
80 export ALLOWED_FLAGS="-pipe" 96 export ALLOWED_FLAGS="-pipe"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
84 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
85 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
86 fi 102 fi
87 # allow a bunch of flags that negate features / control ABI 103 # allow a bunch of flags that negate features / control ABI
88 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 104 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
89 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
90 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 106 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
91 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 107 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
92 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 108 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
109 -mieee -mieee-with-inexact \
110 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
93 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 111 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
94 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 112 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
95 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 113 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
96 114
97 # C[XX]FLAGS that we are think is ok, but needs testing 115 # C[XX]FLAGS that we are think is ok, but needs testing
98 # NOTE: currently -Os have issues with gcc3 and K6* arch's 116 # NOTE: currently -Os have issues with gcc3 and K6* arch's
99 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 117 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
100 return 0 118 return 0
119}
120
121# inverted filters for hardened compiler. This is trying to unpick
122# the hardened compiler defaults.
123_filter-hardened() {
124 local f
125 for f in "$@" ; 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\[*]}
101} 161}
102 162
103filter-flags() { 163filter-flags() {
104 local x f fset 164 _filter-hardened "$@"
105 declare -a new_CFLAGS new_CXXFLAGS 165 _filter-var CFLAGS "$@"
106 166 _filter-var CXXFLAGS "$@"
107 for x in "$@" ; do
108 case "${x}" in
109 -fPIC|-fpic|-fPIE|-fpie|-pie)
110 append-flags `test_flag -fno-pie`;;
111 -fstack-protector|-fstack-protector-all)
112 fstack-flags;;
113 esac
114 done
115
116 for fset in CFLAGS CXXFLAGS; do
117 # Looping over the flags instead of using a global
118 # substitution ensures that we're working with flag atoms.
119 # Otherwise globs like -O* have the potential to wipe out the
120 # list of flags.
121 for f in ${!fset}; do
122 for x in "$@"; do
123 # Note this should work with globs like -O*
124 [[ ${f} == ${x} ]] && continue 2
125 done
126 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
127 done
128 eval export ${fset}=\${new_${fset}\[*]}
129 done
130
131 return 0 167 return 0
132} 168}
133 169
134filter-lfs-flags() { 170filter-lfs-flags() {
171 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 172 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 173}
137 174
138append-lfs-flags() { 175append-lfs-flags() {
176 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 177 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140} 178}
141 179
142append-flags() { 180append-flags() {
143 [[ -z $* ]] && return 0 181 [[ -z $* ]] && return 0
144 export CFLAGS="${CFLAGS} $*" 182 export CFLAGS="${CFLAGS} $*"
145 export CXXFLAGS="${CXXFLAGS} $*" 183 export CXXFLAGS="${CXXFLAGS} $*"
146 [ -n "`is-flag -fno-stack-protector`" -o \
147 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
148 return 0 184 return 0
149} 185}
150 186
151replace-flags() { 187replace-flags() {
188 [[ $# != 2 ]] \
189 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
190 && die "replace-flags takes 2 arguments, not $#"
191
152 local f fset 192 local f fset
153 declare -a new_CFLAGS new_CXXFLAGS 193 declare -a new_CFLAGS new_CXXFLAGS
154 194
155 for fset in CFLAGS CXXFLAGS; do 195 for fset in CFLAGS CXXFLAGS; do
156 # Looping over the flags instead of using a global 196 # Looping over the flags instead of using a global
179 shift 219 shift
180 done 220 done
181 return 0 221 return 0
182} 222}
183 223
184is-flag() { 224is-flagq() {
185 local x 225 local x
186 226
187 for x in ${CFLAGS} ${CXXFLAGS} ; do 227 for x in ${CFLAGS} ${CXXFLAGS} ; do
188 # Note this should work with globs like -mcpu=ultrasparc* 228 # Note this should work with globs like -mcpu=ultrasparc*
189 if [[ ${x} == ${1} ]]; then 229 if [[ ${x} == ${1} ]]; then
190 echo true
191 return 0 230 return 0
192 fi 231 fi
193 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 ${1}; then
258 echo true
259 return 0
260 fi
194 return 1 261 return 1
195} 262}
196 263
197filter-mfpmath() { 264filter-mfpmath() {
198 local orig_mfpmath new_math prune_math 265 local orig_mfpmath new_math prune_math
268 export CFLAGS="${NEW_CFLAGS}" 335 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}" 336 export CXXFLAGS="${NEW_CXXFLAGS}"
270 return 0 337 return 0
271} 338}
272 339
340test-flag-PROG() {
341 local comp=$1
342 local flags="$2"
343
344 [[ -z ${comp} || -z ${flags} ]] && \
345 return 1
346
347 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1
350}
351
352# Returns true if C compiler support given flag
353test-flag-CC() { test-flag-PROG "CC" "$1"; }
354
355# Returns true if C++ compiler support given flag
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
357
358test-flags-PROG() {
359 local comp=$1
360 local flags
361 local x
362
363 shift
364
365 [[ -z ${comp} ]] && \
366 return 1
367
368 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags} ${x}"
370 done
371
372 echo "${flags}"
373
374 # Just bail if we dont have any flags
375 [[ -n ${flags} ]]
376}
377
378# Returns (echo's) the given flags supported by the C compiler
379test-flags-CC() { test-flags-PROG "CC" "$@"; }
380
381# Returns (echo's) the given flags supported by the C++ compiler
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383
384# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; }
387
388# Depriciated, use test-flags()
273test_flag() { 389test_flag() {
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 390 ewarn "test_flag: deprecated, please use test-flags()!" >&2
275 printf "%s\n" "$*" 391
276 return 0 392 test-flags-CC "$@"
277 fi
278 return 1
279} 393}
280 394
281test_version_info() { 395test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 397 return 0
285 return 1 399 return 1
286 fi 400 fi
287} 401}
288 402
289strip-unsupported-flags() { 403strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 404 local x NEW_CFLAGS NEW_CXXFLAGS
291 405
292 for x in ${CFLAGS} ; do 406 for x in ${CFLAGS} ; do
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 407 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
294 done 408 done
295 for x in ${CXXFLAGS} ; do 409 for x in ${CXXFLAGS} ; do
296 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`" 410 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
297 done 411 done
298 412
299 export CFLAGS="${NEW_CFLAGS}" 413 export CFLAGS=${NEW_CFLAGS}
300 export CXXFLAGS="${NEW_CXXFLAGS}" 414 export CXXFLAGS=${NEW_CXXFLAGS}
301} 415}
302 416
303get-flag() { 417get-flag() {
304 local f findflag="$1" 418 local f findflag="$1"
305 419
315 fi 429 fi
316 done 430 done
317 return 1 431 return 1
318} 432}
319 433
434# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
320has_hardened() { 435has_hardened() {
436 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
437
321 test_version_info Hardened && return 0 438 test_version_info Hardened && return 0
322 # the specs file wont exist unless gcc has GCC_SPECS support 439 # The specs file wont exist unless gcc has GCC_SPECS support
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 440 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
324 return 0
325 return 1
326} 441}
327 442
443# DEPRECATED - use gcc-specs-pie from toolchain-funcs
328# indicate whether PIC is set 444# indicate whether PIC is set
329has_pic() { 445has_pic() {
330 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 446 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
331 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
332 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
333 return 1
334}
335 447
448 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
449 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
450 gcc-specs-pie
451}
452
453# DEPRECATED - use gcc-specs-pie from toolchain-funcs
336# indicate whether PIE is set 454# indicate whether PIE is set
337has_pie() { 455has_pie() {
338 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 456 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
339 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
340 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
341 # test PIC while waiting for specs to be updated to generate __PIE__
342 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
343 return 1
344}
345 457
458 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
459 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
460 gcc-specs-pie
461}
462
463# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
346# indicate whether code for SSP is being generated for all functions 464# indicate whether code for SSP is being generated for all functions
347has_ssp_all() { 465has_ssp_all() {
466 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
467
348 # note; this matches only -fstack-protector-all 468 # note; this matches only -fstack-protector-all
349 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0 469 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
350 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0 470 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
351 return 1 471 gcc-specs-ssp-all
352} 472}
353 473
474# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
354# indicate whether code for SSP is being generated 475# indicate whether code for SSP is being generated
355has_ssp() { 476has_ssp() {
477 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
478
356 # note; this matches both -fstack-protector and -fstack-protector-all 479 # note; this matches both -fstack-protector and -fstack-protector-all
357 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 480 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
358 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0 481 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
359 return 1 482 gcc-specs-ssp
360} 483}
361 484
362has_m64() { 485has_m64() {
363 # this doesnt test if the flag is accepted, it tests if the flag 486 # this doesnt test if the flag is accepted, it tests if the flag
364 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 487 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
365 # please dont replace this function with test_flag in some future 488 # please dont replace this function with test_flag in some future
366 # clean-up! 489 # clean-up!
490
367 local temp="$(emktemp)" 491 local temp="$(emktemp)"
368 echo "int main() { return(0); }" > ${temp}.c 492 echo "int main() { return(0); }" > "${temp}".c
369 MY_CC=$(tc-getCC) 493 MY_CC=$(tc-getCC)
370 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 494 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
371 local ret=$? 495 local ret=$?
372 rm -f ${temp}.c 496 rm -f "${temp}".c
373 [ "$ret" != "1" ] && return 0 497 [[ ${ret} != 1 ]] && return 0
374 return 1 498 return 1
375} 499}
376 500
377has_m32() { 501has_m32() {
378 # this doesnt test if the flag is accepted, it tests if the flag 502 # this doesnt test if the flag is accepted, it tests if the flag
380 # please dont replace this function with test_flag in some future 504 # please dont replace this function with test_flag in some future
381 # clean-up! 505 # clean-up!
382 506
383 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 507 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
384 508
385 local temp="$(emktemp)" 509 local temp=$(emktemp)
386 echo "int main() { return(0); }" > ${temp}.c 510 echo "int main() { return(0); }" > "${temp}".c
387 MY_CC=$(tc-getCC) 511 MY_CC=$(tc-getCC)
388 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 512 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
389 local ret=$? 513 local ret=$?
390 rm -f ${temp}.c 514 rm -f "${temp}".c
391 [ "$ret" != "1" ] && return 0 515 [[ ${ret} != 1 ]] && return 0
392 return 1 516 return 1
393} 517}
394 518
395replace-sparc64-flags() { 519replace-sparc64-flags() {
396 local SPARC64_CPUS="ultrasparc v9" 520 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
397 521
398 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 522 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
399 for x in ${SPARC64_CPUS}; do 523 for x in ${SPARC64_CPUS}; do
400 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 524 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
401 done 525 done
417 541
418 export CFLAGS CXXFLAGS 542 export CFLAGS CXXFLAGS
419} 543}
420 544
421append-ldflags() { 545append-ldflags() {
546 [[ -z $* ]] && return 0
422 export LDFLAGS="${LDFLAGS} $*" 547 export LDFLAGS="${LDFLAGS} $*"
423 return 0 548 return 0
424} 549}
425 550
551# Remove flags from LDFLAGS - it's up to the ebuild to filter
552# CFLAGS and CXXFLAGS via filter-flags if they need to.
426filter-ldflags() { 553filter-ldflags() {
427 local x 554 _filter-var LDFLAGS "$@"
555 return 0
556}
428 557
429 # we do this fancy spacing stuff so as to not filter 558# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
430 # out part of a flag ... we want flag atoms ! :D 559# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
431 LDFLAGS=" ${LDFLAGS} " 560# to gcc where it needs the '-Wl,'.
561raw-ldflags() {
562 local x input="$@"
563 [[ -z ${input} ]] && input=${LDFLAGS}
564 set --
432 for x in "$@" ; do 565 for x in ${input} ; do
433 LDFLAGS=${LDFLAGS// ${x} / } 566 x=${x#-Wl,}
567 set -- "$@" ${x//,/ }
434 done 568 done
435 [[ -z ${LDFLAGS// } ]] \ 569 echo "$@"
436 && LDFLAGS="" \
437 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
438 export LDFLAGS
439 return 0
440}
441
442fstack-flags() {
443 if has_ssp; then
444 [ -z "`is-flag -fno-stack-protector`" ] &&
445 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
446 fi
447 return 0
448} 570}
449 571
450# 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>,
451# 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
452# fixes. 574# fixes.
466 588
467 replace-cpu-flags ev6{7,8} ev6 589 replace-cpu-flags ev6{7,8} ev6
468 590
469 export CFLAGS CXXFLAGS 591 export CFLAGS CXXFLAGS
470} 592}
593
594# Gets the flags needed for "NOW" binding
595bindnow-flags() {
596 case $($(tc-getLD) -v 2>&1 </dev/null) in
597 *GNU* | *'with BFD'*) # GNU ld
598 echo "-Wl,-z,now" ;;
599 *Apple*) # Darwin ld
600 echo "-bind_at_load" ;;
601 *)
602 # Some linkers just recognize -V instead of -v
603 case $($(tc-getLD) -V 2>&1 </dev/null) in
604 *Solaris*) # Solaris accept almost the same GNU options
605 echo "-Wl,-z,now" ;;
606 esac
607 ;;
608 esac
609}

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