/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.71 Revision 1.108
1# Copyright 1999-2004 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 1.71 2004/10/01 10:00:36 robbat2 Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.108 2006/06/15 14:45:59 vapier Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Maintainer: base-system@gentoo.org
6 6
7ECLASS=flag-o-matic 7# need access to emktemp()
8INHERITED="$INHERITED $ECLASS" 8inherit eutils toolchain-funcs multilib
9
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
12IUSE="${IUSE} debug"
13 9
14# 10#
15#### filter-flags <flags> #### 11#### filter-flags <flags> ####
16# Remove particular flags from C[XX]FLAGS 12# Remove particular flags from C[XX]FLAGS
17# Matches only complete flags 13# Matches only complete flags
24# 20#
25#### replace-cpu-flags <old.cpus> <new.cpu> ### 21#### replace-cpu-flags <old.cpus> <new.cpu> ###
26# Replace march/mcpu flags that specify <old.cpus> 22# Replace march/mcpu flags that specify <old.cpus>
27# with flags that specify <new.cpu> 23# with flags that specify <new.cpu>
28# 24#
29#### is-flag <flag> #### 25#### is-flag[q] <flag> ####
30# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
31# 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
32# 34#
33#### strip-flags #### 35#### strip-flags ####
34# Strip C[XX]FLAGS of everything except known 36# Strip C[XX]FLAGS of everything except known
35# good options. 37# good options.
36# 38#
55# 57#
56#### filter-ldflags <flags> #### 58#### filter-ldflags <flags> ####
57# Remove particular flags from LDFLAGS 59# Remove particular flags from LDFLAGS
58# Matches only complete flags 60# Matches only complete flags
59# 61#
60#### etexec-flags #### 62#### bindnow-flags ####
61# hooked function for hardened gcc that appends 63# Returns the flags to enable "now" binding in the current selected linker.
62# -fno-pic to {C,CXX,LD}FLAGS
63# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
64# 64#
65#### fstack-flags #### 65################ DEPRECATED functions ################
66# hooked function for hardened gcc that appends 66# The following are still present to avoid breaking existing
67# -fno-stack-protector to {C,CXX,LD}FLAGS 67# code more than necessary; however they are deprecated. Please
68# when a package is filtering -fstack-protector, -fstack-protector-all 68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# notice: modern automatic specs files will also suppress -fstack-protector-all 69# need to know which hardened techs are active in the compiler.
70# when only -fno-stack-protector is given 70# See bug #100974
71#
72#### has_hardened ####
73# Returns true if the compiler has 'Hardened' in its version string,
74# (note; switched-spec vanilla compilers satisfy this condition) or
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all ####
86# Returns true if the compiler by default or with current CFLAGS
87# generates stack smash protections for all functions
88#
89#### has_ssp ####
90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions
71# 92#
72 93
73# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
74setup-allowed-flags() { 95setup-allowed-flags() {
75 if [ -z "${ALLOWED_FLAGS}" ] ; then 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g" 97 export ALLOWED_FLAGS="-pipe"
77 case "${ARCH}" in 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
83 esac
84 fi 104 fi
85 # allow a bunch of flags that negate features / control ABI 105 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
87 case "${ARCH}" in 107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
88 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 108 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
89 esac 109 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
90 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias" 110 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
111 -mieee -mieee-with-inexact \
112 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
113 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
91 116
92 # C[XX]FLAGS that we are think is ok, but needs testing 117 # C[XX]FLAGS that we are think is ok, but needs testing
93 # NOTE: currently -Os have issues with gcc3 and K6* arch's 118 # NOTE: currently -Os have issues with gcc3 and K6* arch's
94 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 119 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
95 return 0 120 return 0
121}
122
123# inverted filters for hardened compiler. This is trying to unpick
124# the hardened compiler defaults.
125_filter-hardened() {
126 local f
127 for f in "$@" ; 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\[*]}
96} 163}
97 164
98filter-flags() { 165filter-flags() {
99 local x f fset 166 _filter-hardened "$@"
100 declare -a new_CFLAGS new_CXXFLAGS 167 _filter-var CFLAGS "$@"
101 168 _filter-var CXXFLAGS "$@"
102 for x in "$@" ; do
103 case "${x}" in
104 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
105 -fstack-protector|-fstack-protector-all) fstack-flags;;
106 esac
107 done
108
109 for fset in CFLAGS CXXFLAGS; do
110 # Looping over the flags instead of using a global
111 # substitution ensures that we're working with flag atoms.
112 # Otherwise globs like -O* have the potential to wipe out the
113 # list of flags.
114 for f in ${!fset}; do
115 for x in "$@"; do
116 # Note this should work with globs like -O*
117 [[ ${f} == ${x} ]] && continue 2
118 done
119 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
120 done
121 eval export ${fset}=\${new_${fset}\[*]}
122 done
123
124 return 0 169 return 0
125} 170}
126 171
127filter-lfs-flags() { 172filter-lfs-flags() {
173 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
128 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 174 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
129} 175}
130 176
131append-lfs-flags() { 177append-lfs-flags() {
178 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
132 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 179 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
133} 180}
134 181
135append-flags() { 182append-flags() {
183 [[ -z $* ]] && return 0
136 export CFLAGS="${CFLAGS} $*" 184 export CFLAGS="${CFLAGS} $*"
137 export CXXFLAGS="${CXXFLAGS} $*" 185 export CXXFLAGS="${CXXFLAGS} $*"
138 [ -n "`is-flag -fno-stack-protector`" -o \
139 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
140 return 0 186 return 0
141} 187}
142 188
143replace-flags() { 189replace-flags() {
190 [[ $# != 2 ]] \
191 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
192 && die "replace-flags takes 2 arguments, not $#"
193
144 local f fset 194 local f fset
145 declare -a new_CFLAGS new_CXXFLAGS 195 declare -a new_CFLAGS new_CXXFLAGS
146 196
147 for fset in CFLAGS CXXFLAGS; do 197 for fset in CFLAGS CXXFLAGS; do
148 # Looping over the flags instead of using a global 198 # Looping over the flags instead of using a global
149 # substitution ensures that we're working with flag atoms. 199 # substitution ensures that we're working with flag atoms.
171 shift 221 shift
172 done 222 done
173 return 0 223 return 0
174} 224}
175 225
176is-flag() { 226is-flagq() {
177 local x 227 local x
178 228
179 for x in ${CFLAGS} ${CXXFLAGS} ; do 229 for x in ${CFLAGS} ${CXXFLAGS} ; do
180 # Note this should work with globs like -mcpu=ultrasparc* 230 # Note this should work with globs like -mcpu=ultrasparc*
181 if [[ ${x} == ${1} ]]; then 231 if [[ ${x} == ${1} ]]; then
182 echo true
183 return 0 232 return 0
184 fi 233 fi
185 done 234 done
235 return 1
236}
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 ${1}; then
260 echo true
261 return 0
262 fi
186 return 1 263 return 1
187} 264}
188 265
189filter-mfpmath() { 266filter-mfpmath() {
190 local orig_mfpmath new_math prune_math 267 local orig_mfpmath new_math prune_math
219 296
220 local NEW_CFLAGS="" 297 local NEW_CFLAGS=""
221 local NEW_CXXFLAGS="" 298 local NEW_CXXFLAGS=""
222 299
223 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 300 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
224 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 301 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
225 use debug && einfo "Enabling the use of some unstable flags"
226 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 302 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
227 fi 303 fi
228 304
229 set -f # disable pathname expansion 305 set -f # disable pathname expansion
230 306
261 export CFLAGS="${NEW_CFLAGS}" 337 export CFLAGS="${NEW_CFLAGS}"
262 export CXXFLAGS="${NEW_CXXFLAGS}" 338 export CXXFLAGS="${NEW_CXXFLAGS}"
263 return 0 339 return 0
264} 340}
265 341
342test-flag-PROG() {
343 local comp=$1
344 local flags="$2"
345
346 [[ -z ${comp} || -z ${flags} ]] && \
347 return 1
348
349 local PROG=$(tc-get${comp})
350 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
351 > /dev/null 2>&1
352}
353
354# Returns true if C compiler support given flag
355test-flag-CC() { test-flag-PROG "CC" "$1"; }
356
357# Returns true if C++ compiler support given flag
358test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
359
360test-flags-PROG() {
361 local comp=$1
362 local flags
363 local x
364
365 shift
366
367 [[ -z ${comp} ]] && \
368 return 1
369
370 for x in "$@" ; do
371 test-flag-${comp} "${x}" && flags="${flags} ${x}"
372 done
373
374 echo "${flags}"
375
376 # Just bail if we dont have any flags
377 [[ -n ${flags} ]]
378}
379
380# Returns (echo's) the given flags supported by the C compiler
381test-flags-CC() { test-flags-PROG "CC" "$@"; }
382
383# Returns (echo's) the given flags supported by the C++ compiler
384test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
385
386# Short-hand that should hopefully work for both C and C++ compiler, but
387# its really only present due to the append-flags() abomination.
388test-flags() { test-flags-CC "$@"; }
389
390# Depriciated, use test-flags()
266test_flag() { 391test_flag() {
267 local cc=${CC:-gcc} ; cc=${cc%% *} 392 ewarn "test_flag: deprecated, please use test-flags()!" >&2
268 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then 393
269 printf "%s\n" "$*" 394 test-flags-CC "$@"
270 return 0
271 fi
272 return 1
273} 395}
274 396
275test_version_info() { 397test_version_info() {
276 local cc=${CC:-gcc} ; cc=${cc%% *}
277 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 398 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
278 return 0 399 return 0
279 else 400 else
280 return 1 401 return 1
281 fi 402 fi
282} 403}
283 404
284strip-unsupported-flags() { 405strip-unsupported-flags() {
285 local NEW_CFLAGS NEW_CXXFLAGS 406 local x NEW_CFLAGS NEW_CXXFLAGS
286 407
287 for x in ${CFLAGS} ; do 408 for x in ${CFLAGS} ; do
288 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 409 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
289 done 410 done
290 for x in ${CXXFLAGS} ; do 411 for x in ${CXXFLAGS} ; do
291 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`" 412 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
292 done 413 done
293 414
294 export CFLAGS="${NEW_CFLAGS}" 415 export CFLAGS=${NEW_CFLAGS}
295 export CXXFLAGS="${NEW_CXXFLAGS}" 416 export CXXFLAGS=${NEW_CXXFLAGS}
296} 417}
297 418
298get-flag() { 419get-flag() {
299 local f findflag="$1" 420 local f findflag="$1"
300 421
310 fi 431 fi
311 done 432 done
312 return 1 433 return 1
313} 434}
314 435
436# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
315has_hardened() { 437has_hardened() {
438 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
439
316 test_version_info Hardened && return 0 440 test_version_info Hardened && return 0
317 # the specs file wont exist unless gcc has GCC_SPECS support 441 # The specs file wont exist unless gcc has GCC_SPECS support
318 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 442 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
319 return 0
320 return 1
321} 443}
322 444
445# DEPRECATED - use gcc-specs-pie from toolchain-funcs
446# indicate whether PIC is set
323has_pic() { 447has_pic() {
324 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 448 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
325 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
326 test_version_info pie && return 0
327 return 1
328}
329 449
450 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
451 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
452 gcc-specs-pie
453}
454
455# DEPRECATED - use gcc-specs-pie from toolchain-funcs
456# indicate whether PIE is set
330has_pie() { 457has_pie() {
331 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 458 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
332 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 459
333 test_version_info pie && return 0 460 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
334 return 1 461 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
462 gcc-specs-pie
335} 463}
336 464
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466# indicate whether code for SSP is being generated for all functions
467has_ssp_all() {
468 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
469
470 # note; this matches only -fstack-protector-all
471 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
473 gcc-specs-ssp-all
474}
475
476# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
477# indicate whether code for SSP is being generated
337has_ssp() { 478has_ssp() {
479 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
480
481 # note; this matches both -fstack-protector and -fstack-protector-all
338 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 482 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
339 test_version_info ssp && return 0 483 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
340 return 1 484 gcc-specs-ssp
341} 485}
342 486
343has_m64() { 487has_m64() {
344 # this doesnt test if the flag is accepted, it tests if the flag 488 # this doesnt test if the flag is accepted, it tests if the flag
345 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 489 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
346 # please dont replace this function with test_flag in some future 490 # please dont replace this function with test_flag in some future
347 # clean-up! 491 # clean-up!
348 temp=`mktemp` 492
493 local temp="$(emktemp)"
349 echo "int main() { return(0); }" > ${temp}.c 494 echo "int main() { return(0); }" > "${temp}".c
350 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 495 MY_CC=$(tc-getCC)
351 ret=$? 496 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
497 local ret=$?
352 rm -f ${temp}.c 498 rm -f "${temp}".c
353 [ "$ret" != "1" ] && return 0 499 [[ ${ret} != 1 ]] && return 0
354 return 1 500 return 1
355} 501}
356 502
357has_m32() { 503has_m32() {
358 # this doesnt test if the flag is accepted, it tests if the flag 504 # this doesnt test if the flag is accepted, it tests if the flag
359 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 505 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
360 # please dont replace this function with test_flag in some future 506 # please dont replace this function with test_flag in some future
361 # clean-up! 507 # clean-up!
362 temp=`mktemp` 508
509 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
510
511 local temp=$(emktemp)
363 echo "int main() { return(0); }" > ${temp}.c 512 echo "int main() { return(0); }" > "${temp}".c
364 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 513 MY_CC=$(tc-getCC)
365 ret=$? 514 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
515 local ret=$?
366 rm -f ${temp}.c 516 rm -f "${temp}".c
367 [ "$ret" != "1" ] && return 0 517 [[ ${ret} != 1 ]] && return 0
368 return 1 518 return 1
369} 519}
370 520
371replace-sparc64-flags() { 521replace-sparc64-flags() {
372 local SPARC64_CPUS="ultrasparc v9" 522 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
373 523
374 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 524 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
375 for x in ${SPARC64_CPUS}; do 525 for x in ${SPARC64_CPUS}; do
376 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 526 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
377 done 527 done
378 else 528 else
379 for x in ${SPARC64_CPUS}; do 529 for x in ${SPARC64_CPUS}; do
380 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 530 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
381 done 531 done
382 fi 532 fi
383 533
384 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 534 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
385 for x in ${SPARC64_CPUS}; do 535 for x in ${SPARC64_CPUS}; do
386 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 536 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
387 done 537 done
388 else 538 else
389 for x in ${SPARC64_CPUS}; do 539 for x in ${SPARC64_CPUS}; do
393 543
394 export CFLAGS CXXFLAGS 544 export CFLAGS CXXFLAGS
395} 545}
396 546
397append-ldflags() { 547append-ldflags() {
548 [[ -z $* ]] && return 0
398 export LDFLAGS="${LDFLAGS} $*" 549 export LDFLAGS="${LDFLAGS} $*"
399 return 0 550 return 0
400} 551}
401 552
553# Remove flags from LDFLAGS - it's up to the ebuild to filter
554# CFLAGS and CXXFLAGS via filter-flags if they need to.
402filter-ldflags() { 555filter-ldflags() {
403 local x 556 _filter-var LDFLAGS "$@"
557 return 0
558}
404 559
405 # we do this fancy spacing stuff so as to not filter 560# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
406 # out part of a flag ... we want flag atoms ! :D 561# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
407 LDFLAGS=" ${LDFLAGS} " 562# to gcc where it needs the '-Wl,'.
563raw-ldflags() {
564 local x input="$@"
565 [[ -z ${input} ]] && input=${LDFLAGS}
566 set --
408 for x in "$@" ; do 567 for x in ${input} ; do
409 LDFLAGS="${LDFLAGS// ${x} / }" 568 x=${x#-Wl,}
569 set -- "$@" ${x//,/ }
410 done 570 done
411 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 571 echo "$@"
412 export LDFLAGS
413 return 0
414} 572}
415 573
416etexec-flags() { 574# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
417 # if you're not using a hardened compiler you wont need this 575# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
418 # PIC/no-pic kludge in the first place. 576# fixes.
419 has_hardened || return 0 577#
420 # this kludge breaks on amd64, and probably other -fPIC dependant 578# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
421 # archs. 579gcc2-flags() {
422 use amd64 && return 0 580 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
423 581 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
424 if has_pie || has_pic; then 582 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
425 [ -z "`is-flag -fno-pic`" ] &&
426 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
427 [ -z "`is-flag -nopie`" ] &&
428 export CFLAGS="${CFLAGS} `test_flag -nopie`"
429 fi 583 fi
430 return 0
431}
432 584
433fstack-flags() { 585 replace-cpu-flags k6-{2,3} k6
434 if has_ssp; then 586 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
435 [ -z "`is-flag -fno-stack-protector`" ] && 587
436 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 588 replace-cpu-flags pentium-mmx i586
437 fi 589 replace-cpu-flags pentium{2,3,4} i686
438 return 0 590
591 replace-cpu-flags ev6{7,8} ev6
592
593 export CFLAGS CXXFLAGS
439} 594}
595
596# Gets the flags needed for "NOW" binding
597bindnow-flags() {
598 case $($(tc-getLD) -v 2>&1 </dev/null) in
599 *GNU* | *'with BFD'*) # GNU ld
600 echo "-Wl,-z,now" ;;
601 *Apple*) # Darwin ld
602 echo "-bind_at_load" ;;
603 *)
604 # Some linkers just recognize -V instead of -v
605 case $($(tc-getLD) -V 2>&1 </dev/null) in
606 *Solaris*) # Solaris accept almost the same GNU options
607 echo "-Wl,-z,now" ;;
608 esac
609 ;;
610 esac
611}

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