/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.73 Revision 1.107
1# Copyright 1999-2004 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 1.73 2004/10/13 14:11:52 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.107 2006/04/15 00:44:16 vapier Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
12IUSE="${IUSE} debug"
13 5
14# need access to emktemp() 6# need access to emktemp()
15inherit eutils 7inherit eutils toolchain-funcs multilib
16 8
17# 9#
18#### filter-flags <flags> #### 10#### filter-flags <flags> ####
19# Remove particular flags from C[XX]FLAGS 11# Remove particular flags from C[XX]FLAGS
20# Matches only complete flags 12# Matches only complete flags
27# 19#
28#### replace-cpu-flags <old.cpus> <new.cpu> ### 20#### replace-cpu-flags <old.cpus> <new.cpu> ###
29# Replace march/mcpu flags that specify <old.cpus> 21# Replace march/mcpu flags that specify <old.cpus>
30# with flags that specify <new.cpu> 22# with flags that specify <new.cpu>
31# 23#
32#### is-flag <flag> #### 24#### is-flag[q] <flag> ####
33# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
34# 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
35# 33#
36#### strip-flags #### 34#### strip-flags ####
37# Strip C[XX]FLAGS of everything except known 35# Strip C[XX]FLAGS of everything except known
38# good options. 36# good options.
39# 37#
58# 56#
59#### filter-ldflags <flags> #### 57#### filter-ldflags <flags> ####
60# Remove particular flags from LDFLAGS 58# Remove particular flags from LDFLAGS
61# Matches only complete flags 59# Matches only complete flags
62# 60#
63#### etexec-flags #### 61#### bindnow-flags ####
64# hooked function for hardened gcc that appends 62# Returns the flags to enable "now" binding in the current selected linker.
65# -fno-pic to {C,CXX,LD}FLAGS
66# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
67# 63#
68#### fstack-flags #### 64################ DEPRECATED functions ################
69# hooked function for hardened gcc that appends 65# The following are still present to avoid breaking existing
70# -fno-stack-protector to {C,CXX,LD}FLAGS 66# code more than necessary; however they are deprecated. Please
71# when a package is filtering -fstack-protector, -fstack-protector-all 67# use gcc-specs-* from toolchain-funcs.eclass instead, if you
72# notice: modern automatic specs files will also suppress -fstack-protector-all 68# need to know which hardened techs are active in the compiler.
73# when only -fno-stack-protector is given 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.
79#
80#### has_pic ####
81# Returns true if the compiler by default or with current CFLAGS
82# builds position-independent code.
83#
84#### has_ssp_all ####
85# Returns true if the compiler by default or with current CFLAGS
86# generates stack smash protections for all functions
87#
88#### has_ssp ####
89# Returns true if the compiler by default or with current CFLAGS
90# generates stack smash protections for most vulnerable functions
74# 91#
75 92
76# C[XX]FLAGS that we allow in strip-flags 93# C[XX]FLAGS that we allow in strip-flags
77setup-allowed-flags() { 94setup-allowed-flags() {
78 if [ -z "${ALLOWED_FLAGS}" ] ; then 95 if [[ -z ${ALLOWED_FLAGS} ]] ; then
79 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g" 96 export ALLOWED_FLAGS="-pipe"
80 case "${ARCH}" in 97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
81 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
82 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
83 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
84 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
85 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
86 esac
87 fi 103 fi
88 # allow a bunch of flags that negate features / control ABI 104 # allow a bunch of flags that negate features / control ABI
89 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
90 case "${ARCH}" in 106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
91 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
92 esac 108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
93 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias" 109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
94 115
95 # C[XX]FLAGS that we are think is ok, but needs testing 116 # C[XX]FLAGS that we are think is ok, but needs testing
96 # NOTE: currently -Os have issues with gcc3 and K6* arch's 117 # NOTE: currently -Os have issues with gcc3 and K6* arch's
97 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
98 return 0 119 return 0
120}
121
122# inverted filters for hardened compiler. This is trying to unpick
123# the hardened compiler defaults.
124_filter-hardened() {
125 local f
126 for f in "$@" ; do
127 case "${f}" in
128 # Ideally we should only concern ourselves with PIE flags,
129 # not -fPIC or -fpic, but too many places filter -fPIC without
130 # thinking about -fPIE.
131 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
132 gcc-specs-pie || continue
133 is-flagq -nopie || append-flags -nopie;;
134 -fstack-protector)
135 gcc-specs-ssp || continue
136 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
137 -fstack-protector-all)
138 gcc-specs-ssp-to-all || continue
139 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
140 esac
141 done
142}
143
144# Remove occurrences of strings from variable given in $1
145# Strings removed are matched as globs, so for example
146# '-O*' would remove -O1, -O2 etc.
147_filter-var() {
148 local f x VAR VAL
149 declare -a new
150
151 VAR=$1
152 shift
153 eval VAL=\${${VAR}}
154 for f in ${VAL}; do
155 for x in "$@"; do
156 # Note this should work with globs like -O*
157 [[ ${f} == ${x} ]] && continue 2
158 done
159 eval new\[\${\#new\[@]}]=\${f}
160 done
161 eval export ${VAR}=\${new\[*]}
99} 162}
100 163
101filter-flags() { 164filter-flags() {
102 local x f fset 165 _filter-hardened "$@"
103 declare -a new_CFLAGS new_CXXFLAGS 166 _filter-var CFLAGS "$@"
104 167 _filter-var CXXFLAGS "$@"
105 for x in "$@" ; do
106 case "${x}" in
107 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
108 -fstack-protector|-fstack-protector-all) fstack-flags;;
109 esac
110 done
111
112 for fset in CFLAGS CXXFLAGS; do
113 # Looping over the flags instead of using a global
114 # substitution ensures that we're working with flag atoms.
115 # Otherwise globs like -O* have the potential to wipe out the
116 # list of flags.
117 for f in ${!fset}; do
118 for x in "$@"; do
119 # Note this should work with globs like -O*
120 [[ ${f} == ${x} ]] && continue 2
121 done
122 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
123 done
124 eval export ${fset}=\${new_${fset}\[*]}
125 done
126
127 return 0 168 return 0
128} 169}
129 170
130filter-lfs-flags() { 171filter-lfs-flags() {
172 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
131 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 173 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
132} 174}
133 175
134append-lfs-flags() { 176append-lfs-flags() {
177 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
135 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 178 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 179}
137 180
138append-flags() { 181append-flags() {
182 [[ -z $* ]] && return 0
139 export CFLAGS="${CFLAGS} $*" 183 export CFLAGS="${CFLAGS} $*"
140 export CXXFLAGS="${CXXFLAGS} $*" 184 export CXXFLAGS="${CXXFLAGS} $*"
141 [ -n "`is-flag -fno-stack-protector`" -o \
142 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
143 return 0 185 return 0
144} 186}
145 187
146replace-flags() { 188replace-flags() {
189 [[ $# != 2 ]] \
190 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
191 && die "replace-flags takes 2 arguments, not $#"
192
147 local f fset 193 local f fset
148 declare -a new_CFLAGS new_CXXFLAGS 194 declare -a new_CFLAGS new_CXXFLAGS
149 195
150 for fset in CFLAGS CXXFLAGS; do 196 for fset in CFLAGS CXXFLAGS; do
151 # Looping over the flags instead of using a global 197 # Looping over the flags instead of using a global
152 # substitution ensures that we're working with flag atoms. 198 # substitution ensures that we're working with flag atoms.
174 shift 220 shift
175 done 221 done
176 return 0 222 return 0
177} 223}
178 224
179is-flag() { 225is-flagq() {
180 local x 226 local x
181 227
182 for x in ${CFLAGS} ${CXXFLAGS} ; do 228 for x in ${CFLAGS} ${CXXFLAGS} ; do
183 # Note this should work with globs like -mcpu=ultrasparc* 229 # Note this should work with globs like -mcpu=ultrasparc*
184 if [[ ${x} == ${1} ]]; then 230 if [[ ${x} == ${1} ]]; then
185 echo true
186 return 0 231 return 0
187 fi 232 fi
188 done 233 done
234 return 1
235}
236
237is-flag() {
238 if is-flagq ${1}; then
239 echo true
240 return 0
241 fi
242 return 1
243}
244
245is-ldflagq() {
246 local x
247
248 for x in ${LDFLAGS} ; do
249 # Note this should work with globs like -mcpu=ultrasparc*
250 if [[ ${x} == ${1} ]]; then
251 return 0
252 fi
253 done
254 return 1
255}
256
257is-ldflag() {
258 if is-ldflagq ${1}; then
259 echo true
260 return 0
261 fi
189 return 1 262 return 1
190} 263}
191 264
192filter-mfpmath() { 265filter-mfpmath() {
193 local orig_mfpmath new_math prune_math 266 local orig_mfpmath new_math prune_math
222 295
223 local NEW_CFLAGS="" 296 local NEW_CFLAGS=""
224 local NEW_CXXFLAGS="" 297 local NEW_CXXFLAGS=""
225 298
226 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 299 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
227 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 300 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
228 use debug && einfo "Enabling the use of some unstable flags"
229 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 301 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
230 fi 302 fi
231 303
232 set -f # disable pathname expansion 304 set -f # disable pathname expansion
233 305
264 export CFLAGS="${NEW_CFLAGS}" 336 export CFLAGS="${NEW_CFLAGS}"
265 export CXXFLAGS="${NEW_CXXFLAGS}" 337 export CXXFLAGS="${NEW_CXXFLAGS}"
266 return 0 338 return 0
267} 339}
268 340
341test-flag-PROG() {
342 local comp=$1
343 local flags="$2"
344
345 [[ -z ${comp} || -z ${flags} ]] && \
346 return 1
347
348 local PROG=$(tc-get${comp})
349 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
350 > /dev/null 2>&1
351}
352
353# Returns true if C compiler support given flag
354test-flag-CC() { test-flag-PROG "CC" "$1"; }
355
356# Returns true if C++ compiler support given flag
357test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
358
359test-flags-PROG() {
360 local comp=$1
361 local flags
362 local x
363
364 shift
365
366 [[ -z ${comp} ]] && \
367 return 1
368
369 for x in "$@" ; do
370 test-flag-${comp} "${x}" && flags="${flags} ${x}"
371 done
372
373 echo "${flags}"
374
375 # Just bail if we dont have any flags
376 [[ -n ${flags} ]]
377}
378
379# Returns (echo's) the given flags supported by the C compiler
380test-flags-CC() { test-flags-PROG "CC" "$@"; }
381
382# Returns (echo's) the given flags supported by the C++ compiler
383test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
384
385# Short-hand that should hopefully work for both C and C++ compiler, but
386# its really only present due to the append-flags() abomination.
387test-flags() { test-flags-CC "$@"; }
388
389# Depriciated, use test-flags()
269test_flag() { 390test_flag() {
270 local cc=${CC:-gcc} ; cc=${cc%% *} 391 ewarn "test_flag: deprecated, please use test-flags()!" >&2
271 if ${cc} -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 392
272 printf "%s\n" "$*" 393 test-flags-CC "$@"
273 return 0
274 fi
275 return 1
276} 394}
277 395
278test_version_info() { 396test_version_info() {
279 local cc=${CC:-gcc} ; cc=${cc%% *}
280 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 397 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
281 return 0 398 return 0
282 else 399 else
283 return 1 400 return 1
284 fi 401 fi
285} 402}
286 403
287strip-unsupported-flags() { 404strip-unsupported-flags() {
288 local NEW_CFLAGS NEW_CXXFLAGS 405 local x NEW_CFLAGS NEW_CXXFLAGS
289 406
290 for x in ${CFLAGS} ; do 407 for x in ${CFLAGS} ; do
291 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 408 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
292 done 409 done
293 for x in ${CXXFLAGS} ; do 410 for x in ${CXXFLAGS} ; do
294 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`" 411 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
295 done 412 done
296 413
297 export CFLAGS="${NEW_CFLAGS}" 414 export CFLAGS=${NEW_CFLAGS}
298 export CXXFLAGS="${NEW_CXXFLAGS}" 415 export CXXFLAGS=${NEW_CXXFLAGS}
299} 416}
300 417
301get-flag() { 418get-flag() {
302 local f findflag="$1" 419 local f findflag="$1"
303 420
313 fi 430 fi
314 done 431 done
315 return 1 432 return 1
316} 433}
317 434
435# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
318has_hardened() { 436has_hardened() {
437 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
438
319 test_version_info Hardened && return 0 439 test_version_info Hardened && return 0
320 # the specs file wont exist unless gcc has GCC_SPECS support 440 # The specs file wont exist unless gcc has GCC_SPECS support
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 441 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
322 return 0
323 return 1
324} 442}
325 443
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIC is set
326has_pic() { 446has_pic() {
327 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 447 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
328 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
329 test_version_info pie && return 0
330 return 1
331}
332 448
449 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
450 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
451 gcc-specs-pie
452}
453
454# DEPRECATED - use gcc-specs-pie from toolchain-funcs
455# indicate whether PIE is set
333has_pie() { 456has_pie() {
334 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 457 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
335 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 458
336 test_version_info pie && return 0 459 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
337 return 1 460 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
461 gcc-specs-pie
338} 462}
339 463
464# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
465# indicate whether code for SSP is being generated for all functions
466has_ssp_all() {
467 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
468
469 # note; this matches only -fstack-protector-all
470 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
472 gcc-specs-ssp-all
473}
474
475# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
476# indicate whether code for SSP is being generated
340has_ssp() { 477has_ssp() {
478 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
479
480 # note; this matches both -fstack-protector and -fstack-protector-all
341 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 481 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
342 test_version_info ssp && return 0 482 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
343 return 1 483 gcc-specs-ssp
344} 484}
345 485
346has_m64() { 486has_m64() {
347 # this doesnt test if the flag is accepted, it tests if the flag 487 # this doesnt test if the flag is accepted, it tests if the flag
348 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 488 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349 # please dont replace this function with test_flag in some future 489 # please dont replace this function with test_flag in some future
350 # clean-up! 490 # clean-up!
491
351 local temp="$(emktemp)" 492 local temp="$(emktemp)"
352 echo "int main() { return(0); }" > ${temp}.c 493 echo "int main() { return(0); }" > "${temp}".c
494 MY_CC=$(tc-getCC)
353 ${CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 495 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
354 local ret=$? 496 local ret=$?
355 rm -f ${temp}.c 497 rm -f "${temp}".c
356 [ "$ret" != "1" ] && return 0 498 [[ ${ret} != 1 ]] && return 0
357 return 1 499 return 1
358} 500}
359 501
360has_m32() { 502has_m32() {
361 # this doesnt test if the flag is accepted, it tests if the flag 503 # this doesnt test if the flag is accepted, it tests if the flag
362 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 504 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
363 # please dont replace this function with test_flag in some future 505 # please dont replace this function with test_flag in some future
364 # clean-up! 506 # clean-up!
507
508 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
509
365 local temp="$(emktemp)" 510 local temp=$(emktemp)
366 echo "int main() { return(0); }" > ${temp}.c 511 echo "int main() { return(0); }" > "${temp}".c
512 MY_CC=$(tc-getCC)
367 ${CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 513 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
368 local ret=$? 514 local ret=$?
369 rm -f ${temp}.c 515 rm -f "${temp}".c
370 [ "$ret" != "1" ] && return 0 516 [[ ${ret} != 1 ]] && return 0
371 return 1 517 return 1
372} 518}
373 519
374replace-sparc64-flags() { 520replace-sparc64-flags() {
375 local SPARC64_CPUS="ultrasparc v9" 521 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
376 522
377 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 523 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
378 for x in ${SPARC64_CPUS}; do 524 for x in ${SPARC64_CPUS}; do
379 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 525 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
380 done 526 done
381 else 527 else
382 for x in ${SPARC64_CPUS}; do 528 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 529 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
384 done 530 done
385 fi 531 fi
386 532
387 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 533 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
388 for x in ${SPARC64_CPUS}; do 534 for x in ${SPARC64_CPUS}; do
389 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 535 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
390 done 536 done
391 else 537 else
392 for x in ${SPARC64_CPUS}; do 538 for x in ${SPARC64_CPUS}; do
396 542
397 export CFLAGS CXXFLAGS 543 export CFLAGS CXXFLAGS
398} 544}
399 545
400append-ldflags() { 546append-ldflags() {
547 [[ -z $* ]] && return 0
401 export LDFLAGS="${LDFLAGS} $*" 548 export LDFLAGS="${LDFLAGS} $*"
402 return 0 549 return 0
403} 550}
404 551
552# Remove flags from LDFLAGS - it's up to the ebuild to filter
553# CFLAGS and CXXFLAGS via filter-flags if they need to.
405filter-ldflags() { 554filter-ldflags() {
406 local x 555 _filter-var LDFLAGS "$@"
556 return 0
557}
407 558
408 # we do this fancy spacing stuff so as to not filter 559# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
409 # out part of a flag ... we want flag atoms ! :D 560# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
410 LDFLAGS=" ${LDFLAGS} " 561# to gcc where it needs the '-Wl,'.
562raw-ldflags() {
563 local x input="$@"
564 [[ -z ${input} ]] && input=${LDFLAGS}
565 set --
411 for x in "$@" ; do 566 for x in ${input} ; do
412 LDFLAGS="${LDFLAGS// ${x} / }" 567 x=${x#-Wl,}
568 set -- "$@" ${x//,/ }
413 done 569 done
414 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 570 echo "$@"
415 export LDFLAGS
416 return 0
417}
418
419etexec-flags() {
420 # if you're not using a hardened compiler you wont need this
421 # PIC/no-pic kludge in the first place.
422 has_hardened || return 0
423 # this kludge breaks on amd64, and probably other -fPIC dependant
424 # archs.
425 use amd64 && return 0
426
427 if has_pie || has_pic; then
428 [ -z "`is-flag -fno-pic`" ] &&
429 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
430 [ -z "`is-flag -nopie`" ] &&
431 export CFLAGS="${CFLAGS} `test_flag -nopie`"
432 fi
433 return 0
434}
435
436fstack-flags() {
437 if has_ssp; then
438 [ -z "`is-flag -fno-stack-protector`" ] &&
439 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
440 fi
441 return 0
442} 571}
443 572
444# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 573# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
445# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 574# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
446# fixes. 575# fixes.
447# 576#
448# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 577# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
449gcc2-flags() { 578gcc2-flags() {
450 CFLAGS=${CFLAGS//pentium-mmx/i586} 579 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
451 CFLAGS=${CFLAGS//pentium[234]/i686} 580 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
452 CFLAGS=${CFLAGS//k6-[23]/k6} 581 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
453 CFLAGS=${CFLAGS//athlon-tbird/i686}
454 CFLAGS=${CFLAGS//athlon-4/i686}
455 CFLAGS=${CFLAGS//athlon-[xm]p/i686}
456 CFLAGS=${CFLAGS//athlon/i686}
457
458 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
459 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
460 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
461 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
462 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
463 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
464 CXXFLAGS=${CXXFLAGS//athlon/i686}
465
466 if [ "$ARCH" = alpha ]; then
467 CHOST=${CHOST/#alphaev6[78]/alphaev6}
468 CFLAGS=${CFLAGS//ev6[78]/ev6}
469 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
470 fi 582 fi
583
584 replace-cpu-flags k6-{2,3} k6
585 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
586
587 replace-cpu-flags pentium-mmx i586
588 replace-cpu-flags pentium{2,3,4} i686
589
590 replace-cpu-flags ev6{7,8} ev6
471 591
472 export CFLAGS CXXFLAGS 592 export CFLAGS CXXFLAGS
473} 593}
594
595# Gets the flags needed for "NOW" binding
596bindnow-flags() {
597 case $($(tc-getLD) -v 2>&1 </dev/null) in
598 *GNU* | *'with BFD'*) # GNU ld
599 echo "-Wl,-z,now" ;;
600 *Apple*) # Darwin ld
601 echo "-bind_at_load" ;;
602 *)
603 # Some linkers just recognize -V instead of -v
604 case $($(tc-getLD) -V 2>&1 </dev/null) in
605 *Solaris*) # Solaris accept almost the same GNU options
606 echo "-Wl,-z,now" ;;
607 esac
608 ;;
609 esac
610}

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