/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.79 Revision 1.109
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 1.79 2004/12/25 18:45:56 chriswhite Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.109 2006/07/16 05:49:47 vapier Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Maintainer: base-system@gentoo.org
6
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9
10IUSE="debug"
11 6
12# need access to emktemp() 7# need access to emktemp()
13inherit eutils toolchain-funcs 8inherit eutils toolchain-funcs multilib
14 9
15# 10#
16#### filter-flags <flags> #### 11#### filter-flags <flags> ####
17# Remove particular flags from C[XX]FLAGS 12# Remove particular flags from C[XX]FLAGS
18# Matches only complete flags 13# Matches only complete flags
25# 20#
26#### replace-cpu-flags <old.cpus> <new.cpu> ### 21#### replace-cpu-flags <old.cpus> <new.cpu> ###
27# Replace march/mcpu flags that specify <old.cpus> 22# Replace march/mcpu flags that specify <old.cpus>
28# with flags that specify <new.cpu> 23# with flags that specify <new.cpu>
29# 24#
30#### is-flag <flag> #### 25#### is-flag[q] <flag> ####
31# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
32# 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
33# 34#
34#### strip-flags #### 35#### strip-flags ####
35# Strip C[XX]FLAGS of everything except known 36# Strip C[XX]FLAGS of everything except known
36# good options. 37# good options.
37# 38#
56# 57#
57#### filter-ldflags <flags> #### 58#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS 59# Remove particular flags from LDFLAGS
59# Matches only complete flags 60# Matches only complete flags
60# 61#
61#### etexec-flags #### 62#### bindnow-flags ####
62# hooked function for hardened gcc that appends 63# Returns the flags to enable "now" binding in the current selected linker.
63# -fno-pic to {C,CXX,LD}FLAGS
64# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
65# 64#
66#### fstack-flags #### 65################ DEPRECATED functions ################
67# hooked function for hardened gcc that appends 66# The following are still present to avoid breaking existing
68# -fno-stack-protector to {C,CXX,LD}FLAGS 67# code more than necessary; however they are deprecated. Please
69# when a package is filtering -fstack-protector, -fstack-protector-all 68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
70# notice: modern automatic specs files will also suppress -fstack-protector-all 69# need to know which hardened techs are active in the compiler.
71# 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
72# 92#
73 93
74# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
75setup-allowed-flags() { 95setup-allowed-flags() {
76 if [ -z "${ALLOWED_FLAGS}" ] ; then 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
77 export ALLOWED_FLAGS="-pipe" 97 export ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector" 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
82 case "${ARCH}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;;
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;;
89 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;; 103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
90 esac
91 fi 104 fi
92 # allow a bunch of flags that negate features / control ABI 105 # allow a bunch of flags that negate features / control ABI
93 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
94 case "${ARCH}" in 107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
95 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 108 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
96 esac 109 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
97 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias" 110 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
111 -mieee -mieee-with-inexact \
112 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
113 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
98 116
99 # C[XX]FLAGS that we are think is ok, but needs testing 117 # C[XX]FLAGS that we are think is ok, but needs testing
100 # NOTE: currently -Os have issues with gcc3 and K6* arch's 118 # NOTE: currently -Os have issues with gcc3 and K6* arch's
101 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 119 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
102 return 0 120 return 0
121}
122
123# inverted filters for hardened compiler. This is trying to unpick
124# the hardened compiler defaults.
125_filter-hardened() {
126 local f
127 for f in "$@" ; 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\[*]}
103} 163}
104 164
105filter-flags() { 165filter-flags() {
106 local x f fset 166 _filter-hardened "$@"
107 declare -a new_CFLAGS new_CXXFLAGS 167 _filter-var CFLAGS "$@"
108 168 _filter-var CXXFLAGS "$@"
109 for x in "$@" ; do
110 case "${x}" in
111 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
112 -fstack-protector|-fstack-protector-all) 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 0 169 return 0
132} 170}
133 171
134filter-lfs-flags() { 172filter-lfs-flags() {
173 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
135 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
136} 175}
137 176
138append-lfs-flags() { 177append-lfs-flags() {
178 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
139 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
140} 180}
141 181
142append-flags() { 182append-flags() {
183 [[ -z $* ]] && return 0
143 export CFLAGS="${CFLAGS} $*" 184 export CFLAGS="${CFLAGS} $*"
144 export CXXFLAGS="${CXXFLAGS} $*" 185 export CXXFLAGS="${CXXFLAGS} $*"
145 [ -n "`is-flag -fno-stack-protector`" -o \
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
147 return 0 186 return 0
148} 187}
149 188
150replace-flags() { 189replace-flags() {
190 [[ $# != 2 ]] \
191 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
192 && die "replace-flags takes 2 arguments, not $#"
193
151 local f fset 194 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS 195 declare -a new_CFLAGS new_CXXFLAGS
153 196
154 for fset in CFLAGS CXXFLAGS; do 197 for fset in CFLAGS CXXFLAGS; do
155 # Looping over the flags instead of using a global 198 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms. 199 # substitution ensures that we're working with flag atoms.
178 shift 221 shift
179 done 222 done
180 return 0 223 return 0
181} 224}
182 225
183is-flag() { 226is-flagq() {
184 local x 227 local x
185 228
186 for x in ${CFLAGS} ${CXXFLAGS} ; do 229 for x in ${CFLAGS} ${CXXFLAGS} ; do
187 # Note this should work with globs like -mcpu=ultrasparc* 230 # Note this should work with globs like -mcpu=ultrasparc*
188 if [[ ${x} == ${1} ]]; then 231 if [[ ${x} == ${1} ]]; then
189 echo true
190 return 0 232 return 0
191 fi 233 fi
192 done 234 done
193 return 1 235 return 1
194} 236}
195 237
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 ${1}; then
260 echo true
261 return 0
262 fi
263 return 1
264}
265
196filter-mfpmath() { 266filter-mfpmath() {
197 local orig_mfpmath new_math prune_math 267 local orig_mfpmath new_math prune_math
198 268
199 # save the original -mfpmath flag 269 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`" 270 orig_mfpmath=$(get-flag -mfpmath)
201 # get the value of the current -mfpmath flag 271 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` " 272 new_math=$(get-flag mfpmath)
273 new_math=" ${new_math//,/ } "
203 # figure out which math values are to be removed 274 # figure out which math values are to be removed
204 prune_math="" 275 prune_math=""
205 for prune_math in "$@" ; do 276 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }" 277 new_math=${new_math/ ${prune_math} / }
207 done 278 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 279 new_math=$(echo ${new_math})
280 new_math=${new_math// /,}
209 281
210 if [ -z "${new_math}" ] ; then 282 if [[ -z ${new_math} ]] ; then
211 # if we're removing all user specified math values are 283 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag 284 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath} 285 filter-flags ${orig_mfpmath}
214 else 286 else
215 # if we only want to filter some of the user specified 287 # if we only want to filter some of the user specified
226 298
227 local NEW_CFLAGS="" 299 local NEW_CFLAGS=""
228 local NEW_CXXFLAGS="" 300 local NEW_CXXFLAGS=""
229 301
230 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 302 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
231 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 303 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
232 use debug && einfo "Enabling the use of some unstable flags"
233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 304 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
234 fi 305 fi
235 306
236 set -f # disable pathname expansion 307 set -f # disable pathname expansion
237 308
268 export CFLAGS="${NEW_CFLAGS}" 339 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}" 340 export CXXFLAGS="${NEW_CXXFLAGS}"
270 return 0 341 return 0
271} 342}
272 343
344test-flag-PROG() {
345 local comp=$1
346 local flags="$2"
347
348 [[ -z ${comp} || -z ${flags} ]] && \
349 return 1
350
351 local PROG=$(tc-get${comp})
352 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
353 > /dev/null 2>&1
354}
355
356# Returns true if C compiler support given flag
357test-flag-CC() { test-flag-PROG "CC" "$1"; }
358
359# Returns true if C++ compiler support given flag
360test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
361
362test-flags-PROG() {
363 local comp=$1
364 local flags
365 local x
366
367 shift
368
369 [[ -z ${comp} ]] && \
370 return 1
371
372 for x in "$@" ; do
373 test-flag-${comp} "${x}" && flags="${flags} ${x}"
374 done
375
376 echo "${flags}"
377
378 # Just bail if we dont have any flags
379 [[ -n ${flags} ]]
380}
381
382# Returns (echo's) the given flags supported by the C compiler
383test-flags-CC() { test-flags-PROG "CC" "$@"; }
384
385# Returns (echo's) the given flags supported by the C++ compiler
386test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
387
388# Short-hand that should hopefully work for both C and C++ compiler, but
389# its really only present due to the append-flags() abomination.
390test-flags() { test-flags-CC "$@"; }
391
392# Depriciated, use test-flags()
273test_flag() { 393test_flag() {
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 394 ewarn "test_flag: deprecated, please use test-flags()!" >&2
275 printf "%s\n" "$*" 395
276 return 0 396 test-flags-CC "$@"
277 fi
278 return 1
279} 397}
280 398
281test_version_info() { 399test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 400 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 401 return 0
285 return 1 403 return 1
286 fi 404 fi
287} 405}
288 406
289strip-unsupported-flags() { 407strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 408 local x NEW_CFLAGS NEW_CXXFLAGS
291 409
292 for x in ${CFLAGS} ; do 410 for x in ${CFLAGS} ; do
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 411 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
294 done 412 done
295 for x in ${CXXFLAGS} ; do 413 for x in ${CXXFLAGS} ; do
296 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`" 414 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
297 done 415 done
298 416
299 export CFLAGS="${NEW_CFLAGS}" 417 export CFLAGS=${NEW_CFLAGS}
300 export CXXFLAGS="${NEW_CXXFLAGS}" 418 export CXXFLAGS=${NEW_CXXFLAGS}
301} 419}
302 420
303get-flag() { 421get-flag() {
304 local f findflag="$1" 422 local f findflag="$1"
305 423
315 fi 433 fi
316 done 434 done
317 return 1 435 return 1
318} 436}
319 437
438# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
320has_hardened() { 439has_hardened() {
440 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
441
321 test_version_info Hardened && return 0 442 test_version_info Hardened && return 0
322 # the specs file wont exist unless gcc has GCC_SPECS support 443 # The specs file wont exist unless gcc has GCC_SPECS support
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 444 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
324 return 0
325 return 1
326} 445}
327 446
447# DEPRECATED - use gcc-specs-pie from toolchain-funcs
448# indicate whether PIC is set
328has_pic() { 449has_pic() {
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 450 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331 test_version_info pie && return 0
332 return 1
333}
334 451
452 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
453 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
454 gcc-specs-pie
455}
456
457# DEPRECATED - use gcc-specs-pie from toolchain-funcs
458# indicate whether PIE is set
335has_pie() { 459has_pie() {
336 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 460 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
337 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 461
338 test_version_info pie && return 0 462 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
339 return 1 463 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
464 gcc-specs-pie
340} 465}
341 466
467# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
468# indicate whether code for SSP is being generated for all functions
469has_ssp_all() {
470 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
471
472 # note; this matches only -fstack-protector-all
473 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
474 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
475 gcc-specs-ssp-all
476}
477
478# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
479# indicate whether code for SSP is being generated
342has_ssp() { 480has_ssp() {
481 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
482
483 # note; this matches both -fstack-protector and -fstack-protector-all
343 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 484 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
344 test_version_info ssp && return 0 485 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
345 return 1 486 gcc-specs-ssp
346} 487}
347 488
348has_m64() { 489has_m64() {
349 # this doesnt test if the flag is accepted, it tests if the flag 490 # this doesnt test if the flag is accepted, it tests if the flag
350 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 491 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
351 # please dont replace this function with test_flag in some future 492 # please dont replace this function with test_flag in some future
352 # clean-up! 493 # clean-up!
494
353 local temp="$(emktemp)" 495 local temp="$(emktemp)"
354 echo "int main() { return(0); }" > ${temp}.c 496 echo "int main() { return(0); }" > "${temp}".c
355 MY_CC=$(tc-getCC) 497 MY_CC=$(tc-getCC)
356 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 498 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
357 local ret=$? 499 local ret=$?
358 rm -f ${temp}.c 500 rm -f "${temp}".c
359 [ "$ret" != "1" ] && return 0 501 [[ ${ret} != 1 ]] && return 0
360 return 1 502 return 1
361} 503}
362 504
363has_m32() { 505has_m32() {
364 # this doesnt test if the flag is accepted, it tests if the flag 506 # this doesnt test if the flag is accepted, it tests if the flag
365 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 507 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
366 # please dont replace this function with test_flag in some future 508 # please dont replace this function with test_flag in some future
367 # clean-up! 509 # clean-up!
510
511 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
512
368 local temp="$(emktemp)" 513 local temp=$(emktemp)
369 echo "int main() { return(0); }" > ${temp}.c 514 echo "int main() { return(0); }" > "${temp}".c
370 MY_CC=$(tc-getCC) 515 MY_CC=$(tc-getCC)
371 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 516 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
372 local ret=$? 517 local ret=$?
373 rm -f ${temp}.c 518 rm -f "${temp}".c
374 [ "$ret" != "1" ] && return 0 519 [[ ${ret} != 1 ]] && return 0
375 return 1 520 return 1
376} 521}
377 522
378replace-sparc64-flags() { 523replace-sparc64-flags() {
379 local SPARC64_CPUS="ultrasparc v9" 524 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
380 525
381 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 526 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
382 for x in ${SPARC64_CPUS}; do 527 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 528 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
384 done 529 done
385 else 530 else
386 for x in ${SPARC64_CPUS}; do 531 for x in ${SPARC64_CPUS}; do
387 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 532 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
388 done 533 done
389 fi 534 fi
390 535
391 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 536 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
392 for x in ${SPARC64_CPUS}; do 537 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 538 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
394 done 539 done
395 else 540 else
396 for x in ${SPARC64_CPUS}; do 541 for x in ${SPARC64_CPUS}; do
400 545
401 export CFLAGS CXXFLAGS 546 export CFLAGS CXXFLAGS
402} 547}
403 548
404append-ldflags() { 549append-ldflags() {
550 [[ -z $* ]] && return 0
405 export LDFLAGS="${LDFLAGS} $*" 551 export LDFLAGS="${LDFLAGS} $*"
406 return 0 552 return 0
407} 553}
408 554
555# Remove flags from LDFLAGS - it's up to the ebuild to filter
556# CFLAGS and CXXFLAGS via filter-flags if they need to.
409filter-ldflags() { 557filter-ldflags() {
410 local x 558 _filter-var LDFLAGS "$@"
559 return 0
560}
411 561
412 # we do this fancy spacing stuff so as to not filter 562# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
413 # out part of a flag ... we want flag atoms ! :D 563# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
414 LDFLAGS=" ${LDFLAGS} " 564# to gcc where it needs the '-Wl,'.
565raw-ldflags() {
566 local x input="$@"
567 [[ -z ${input} ]] && input=${LDFLAGS}
568 set --
415 for x in "$@" ; do 569 for x in ${input} ; do
416 LDFLAGS="${LDFLAGS// ${x} / }" 570 x=${x#-Wl,}
571 set -- "$@" ${x//,/ }
417 done 572 done
418 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 573 echo "$@"
419 export LDFLAGS
420 return 0
421}
422
423etexec-flags() {
424 # if you're not using a hardened compiler you wont need this
425 # PIC/no-pic kludge in the first place.
426 has_hardened || return 0
427 use amd64 && return 0
428 use mips && return 0
429
430 if has_pie || has_pic; then
431 [ -z "`is-flag -fno-pic`" ] &&
432 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
433 [ -z "`is-flag -nopie`" ] &&
434 export CFLAGS="${CFLAGS} `test_flag -nopie`"
435 fi
436 return 0
437}
438
439fstack-flags() {
440 if has_ssp; then
441 [ -z "`is-flag -fno-stack-protector`" ] &&
442 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
443 fi
444 return 0
445} 574}
446 575
447# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 576# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
448# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 577# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
449# fixes. 578# fixes.
450# 579#
451# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 580# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
452gcc2-flags() { 581gcc2-flags() {
453 CFLAGS=${CFLAGS//pentium-mmx/i586} 582 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
454 CFLAGS=${CFLAGS//pentium[234]/i686} 583 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
455 CFLAGS=${CFLAGS//k6-[23]/k6} 584 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
456 CFLAGS=${CFLAGS//athlon-tbird/i686}
457 CFLAGS=${CFLAGS//athlon-4/i686}
458 CFLAGS=${CFLAGS//athlon-[xm]p/i686}
459 CFLAGS=${CFLAGS//athlon/i686}
460
461 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
462 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
463 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
464 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
465 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
466 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
467 CXXFLAGS=${CXXFLAGS//athlon/i686}
468
469 if [ "$ARCH" = alpha ]; then
470 CHOST=${CHOST/#alphaev6[78]/alphaev6}
471 CFLAGS=${CFLAGS//ev6[78]/ev6}
472 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
473 fi 585 fi
586
587 replace-cpu-flags k6-{2,3} k6
588 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
589
590 replace-cpu-flags pentium-mmx i586
591 replace-cpu-flags pentium{2,3,4} i686
592
593 replace-cpu-flags ev6{7,8} ev6
474 594
475 export CFLAGS CXXFLAGS 595 export CFLAGS CXXFLAGS
476} 596}
597
598# Gets the flags needed for "NOW" binding
599bindnow-flags() {
600 case $($(tc-getLD) -v 2>&1 </dev/null) in
601 *GNU* | *'with BFD'*) # GNU ld
602 echo "-Wl,-z,now" ;;
603 *Apple*) # Darwin ld
604 echo "-bind_at_load" ;;
605 *)
606 # Some linkers just recognize -V instead of -v
607 case $($(tc-getLD) -V 2>&1 </dev/null) in
608 *Solaris*) # Solaris accept almost the same GNU options
609 echo "-Wl,-z,now" ;;
610 esac
611 ;;
612 esac
613}

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