/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.62 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 1.62 2004/07/15 04:59:44 lv 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 5
8INHERITED="$INHERITED $ECLASS" 6# need access to emktemp()
9IUSE="$IUSE debug" 7inherit eutils toolchain-funcs multilib
10 8
11# 9#
12#### filter-flags <flags> #### 10#### filter-flags <flags> ####
13# Remove particular flags from C[XX]FLAGS 11# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags 12# Matches only complete flags
17# Add extra flags to your current C[XX]FLAGS 15# Add extra flags to your current C[XX]FLAGS
18# 16#
19#### replace-flags <orig.flag> <new.flag> ### 17#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one 18# Replace a flag by another one
21# 19#
22#### replace-cpu-flags <new.cpu> <old.cpus> ### 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#### etexec-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-pic to {C,CXX,LD}FLAGS
60# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
61# 63#
62#### fstack-flags #### 64################ DEPRECATED functions ################
63# hooked function for hardened gcc that appends 65# The following are still present to avoid breaking existing
64# -fno-stack-protector to {C,CXX,LD}FLAGS 66# code more than necessary; however they are deprecated. Please
65# when a package is filtering -fstack-protector, -fstack-protector-all 67# use gcc-specs-* from toolchain-funcs.eclass instead, if you
66# notice: modern automatic specs files will also suppress -fstack-protector-all 68# need to know which hardened techs are active in the compiler.
67# 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
68# 91#
69 92
70# C[XX]FLAGS that we allow in strip-flags 93# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() { 94setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 95 if [[ -z ${ALLOWED_FLAGS} ]] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 96 export ALLOWED_FLAGS="-pipe"
74 case "${ARCH}" in 97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
80 esac
81 fi 103 fi
104 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
82 115
83 # C[XX]FLAGS that we are think is ok, but needs testing 116 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's 117 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
86 return 0 119 return 0
120}
121
122# inverted filters for hardened compiler. This is trying to unpick
123# the hardened compiler defaults.
124_filter-hardened() {
125 local f
126 for f in "$@" ; 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\[*]}
87} 162}
88 163
89filter-flags() { 164filter-flags() {
90 local x f fset 165 _filter-hardened "$@"
91 declare -a new_CFLAGS new_CXXFLAGS 166 _filter-var CFLAGS "$@"
92 167 _filter-var CXXFLAGS "$@"
93 for x in "$@" ; do
94 case "${x}" in
95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
96 -fstack-protector|-fstack-protector-all) fstack-flags;;
97 esac
98 done
99
100 for fset in CFLAGS CXXFLAGS; do
101 for f in ${!fset}; do
102 for x in "$@"; do
103 # Note this should work with globs like -O*
104 [[ ${f} == ${x} ]] && continue 2
105 done
106 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
107 done
108 eval export ${fset}=\${new_${fset}\[*]}
109 done
110
111 return 0 168 return 0
112} 169}
113 170
114filter-lfs-flags() { 171filter-lfs-flags() {
172 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
115 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
116} 174}
117 175
118append-lfs-flags() { 176append-lfs-flags() {
177 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
119 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
120} 179}
121 180
122append-flags() { 181append-flags() {
182 [[ -z $* ]] && return 0
123 export CFLAGS="${CFLAGS} $*" 183 export CFLAGS="${CFLAGS} $*"
124 export CXXFLAGS="${CXXFLAGS} $*" 184 export CXXFLAGS="${CXXFLAGS} $*"
125 [ -n "`is-flag -fno-stack-protector`" -o \
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
127 return 0 185 return 0
128} 186}
129 187
130replace-flags() { 188replace-flags() {
131 # we do this fancy spacing stuff so as to not filter 189 [[ $# != 2 ]] \
132 # out part of a flag ... we want flag atoms ! :D 190 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
133 CFLAGS=" ${CFLAGS} " 191 && die "replace-flags takes 2 arguments, not $#"
134 CXXFLAGS=" ${CXXFLAGS} " 192
135 CFLAGS="${CFLAGS// ${1} / ${2} }" 193 local f fset
136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 194 declare -a new_CFLAGS new_CXXFLAGS
137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 195
138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 196 for fset in CFLAGS CXXFLAGS; do
139 export CFLAGS CXXFLAGS 197 # Looping over the flags instead of using a global
198 # substitution ensures that we're working with flag atoms.
199 # Otherwise globs like -O* have the potential to wipe out the
200 # list of flags.
201 for f in ${!fset}; do
202 # Note this should work with globs like -O*
203 [[ ${f} == ${1} ]] && f=${2}
204 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
205 done
206 eval export ${fset}=\${new_${fset}\[*]}
207 done
208
140 return 0 209 return 0
141} 210}
142 211
143replace-cpu-flags() { 212replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift 213 local newcpu="$#" ; newcpu="${!newcpu}"
145 for oldcpu in "$@" ; do 214 while [ $# -gt 1 ] ; do
215 # quote to make sure that no globbing is done (particularly on
216 # ${oldcpu} prior to calling replace-flags
146 replace-flags -march=${oldcpu} -march=${newcpu} 217 replace-flags "-march=${1}" "-march=${newcpu}"
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 218 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 219 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
220 shift
149 done 221 done
150 return 0 222 return 0
151} 223}
152 224
153is-flag() { 225is-flagq() {
154 local x 226 local x
155 227
156 for x in ${CFLAGS} ${CXXFLAGS} ; do 228 for x in ${CFLAGS} ${CXXFLAGS} ; do
229 # Note this should work with globs like -mcpu=ultrasparc*
157 if [ "${x}" == "$1" ] ; then 230 if [[ ${x} == ${1} ]]; then
158 echo true
159 return 0 231 return 0
160 fi 232 fi
161 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 ${1}; then
259 echo true
260 return 0
261 fi
162 return 1 262 return 1
163} 263}
164 264
165filter-mfpmath() { 265filter-mfpmath() {
166 local orig_mfpmath new_math prune_math 266 local orig_mfpmath new_math prune_math
195 295
196 local NEW_CFLAGS="" 296 local NEW_CFLAGS=""
197 local NEW_CXXFLAGS="" 297 local NEW_CXXFLAGS=""
198 298
199 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 299 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 300 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
201 use debug && einfo "Enabling the use of some unstable flags"
202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 301 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
203 fi 302 fi
204 303
205 set -f # disable pathname expansion 304 set -f # disable pathname expansion
206 305
207 for x in ${CFLAGS}; do 306 for x in ${CFLAGS}; do
208 for y in ${ALLOWED_FLAGS}; do 307 for y in ${ALLOWED_FLAGS}; do
209 flag=${x%%=*} 308 flag=${x%%=*}
210 if [ "${flag%%${y}}" = "" ]; then 309 if [ "${flag%%${y}}" = "" ] ; then
211 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 310 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
212 break 311 break
213 fi 312 fi
214 done 313 done
215 done 314 done
216 315
217 for x in ${CXXFLAGS}; do 316 for x in ${CXXFLAGS}; do
218 for y in ${ALLOWED_FLAGS}; do 317 for y in ${ALLOWED_FLAGS}; do
219 flag=${x%%=*} 318 flag=${x%%=*}
220 if [ "${flag%%${y}}" = "" ]; then 319 if [ "${flag%%${y}}" = "" ] ; then
221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 320 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
222 break 321 break
223 fi 322 fi
224 done 323 done
225 done 324 done
237 export CFLAGS="${NEW_CFLAGS}" 336 export CFLAGS="${NEW_CFLAGS}"
238 export CXXFLAGS="${NEW_CXXFLAGS}" 337 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0 338 return 0
240} 339}
241 340
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()
242test_flag() { 390test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *} 391 ewarn "test_flag: deprecated, please use test-flags()!" >&2
244 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then 392
245 printf "%s\n" "$*" 393 test-flags-CC "$@"
246 return 0
247 fi
248 return 1
249} 394}
250 395
251test_version_info() { 396test_version_info() {
252 local cc=${CC:-gcc} ; cc=${cc%% *}
253 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 397 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
254 return 0 398 return 0
255 else 399 else
256 return 1 400 return 1
257 fi 401 fi
258} 402}
259 403
260strip-unsupported-flags() { 404strip-unsupported-flags() {
261 local NEW_CFLAGS NEW_CXXFLAGS 405 local x NEW_CFLAGS NEW_CXXFLAGS
262 406
263 for x in ${CFLAGS} ; do 407 for x in ${CFLAGS} ; do
264 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 408 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
265 done 409 done
266 for x in ${CXXFLAGS} ; do 410 for x in ${CXXFLAGS} ; do
267 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`" 411 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
268 done 412 done
269 413
270 export CFLAGS="${NEW_CFLAGS}" 414 export CFLAGS=${NEW_CFLAGS}
271 export CXXFLAGS="${NEW_CXXFLAGS}" 415 export CXXFLAGS=${NEW_CXXFLAGS}
272} 416}
273 417
274get-flag() { 418get-flag() {
275 local f findflag="$1" 419 local f findflag="$1"
276 420
286 fi 430 fi
287 done 431 done
288 return 1 432 return 1
289} 433}
290 434
435# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
291has_hardened() { 436has_hardened() {
437 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
438
292 test_version_info Hardened 439 test_version_info Hardened && return 0
293 return $? 440 # The specs file wont exist unless gcc has GCC_SPECS support
441 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
294} 442}
295 443
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIC is set
296has_pic() { 446has_pic() {
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 447 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
299 test_version_info pie && return 0
300 return 1
301}
302 448
449 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
450 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
451 gcc-specs-pie
452}
453
454# DEPRECATED - use gcc-specs-pie from toolchain-funcs
455# indicate whether PIE is set
303has_pie() { 456has_pie() {
304 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 457 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
305 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 458
306 test_version_info pie && return 0 459 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
307 return 1 460 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
461 gcc-specs-pie
308} 462}
309 463
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) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
472 gcc-specs-ssp-all
473}
474
475# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
476# indicate whether code for SSP is being generated
310has_ssp() { 477has_ssp() {
478 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
479
480 # note; this matches both -fstack-protector and -fstack-protector-all
311 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 481 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
312 test_version_info ssp && return 0 482 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
313 return 1 483 gcc-specs-ssp
314} 484}
315 485
316has_m64() { 486has_m64() {
317 # this doesnt test if the flag is accepted, it tests if the flag 487 # this doesnt test if the flag is accepted, it tests if the flag
318 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 488 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
319 # please dont replace this function with test_flag in some future 489 # please dont replace this function with test_flag in some future
320 # clean-up! 490 # clean-up!
321 temp=`mktemp` 491
492 local temp="$(emktemp)"
322 echo "int main() { return(0); }" > ${temp}.c 493 echo "int main() { return(0); }" > "${temp}".c
323 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 494 MY_CC=$(tc-getCC)
324 ret=$? 495 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
496 local ret=$?
325 rm -f ${temp}.c 497 rm -f "${temp}".c
326 [ "$ret" != "1" ] && return 0 498 [[ ${ret} != 1 ]] && return 0
327 return 1 499 return 1
328} 500}
329 501
330has_m32() { 502has_m32() {
331 # this doesnt test if the flag is accepted, it tests if the flag 503 # this doesnt test if the flag is accepted, it tests if the flag
332 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 504 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
333 # please dont replace this function with test_flag in some future 505 # please dont replace this function with test_flag in some future
334 # clean-up! 506 # clean-up!
335 temp=`mktemp` 507
508 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
509
510 local temp=$(emktemp)
336 echo "int main() { return(0); }" > ${temp}.c 511 echo "int main() { return(0); }" > "${temp}".c
337 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 512 MY_CC=$(tc-getCC)
338 ret=$? 513 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
514 local ret=$?
339 rm -f ${temp}.c 515 rm -f "${temp}".c
340 [ "$ret" != "1" ] && return 0 516 [[ ${ret} != 1 ]] && return 0
341 return 1 517 return 1
342} 518}
343 519
344replace-sparc64-flags() { 520replace-sparc64-flags() {
345 local SPARC64_CPUS="ultrasparc v9" 521 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
346 522
347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 523 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
348 for x in ${SPARC64_CPUS}; do 524 for x in ${SPARC64_CPUS}; do
349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 525 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
350 done 526 done
351 else 527 else
352 for x in ${SPARC64_CPUS}; do 528 for x in ${SPARC64_CPUS}; do
353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 529 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
354 done 530 done
355 fi 531 fi
356 532
357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 533 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
358 for x in ${SPARC64_CPUS}; do 534 for x in ${SPARC64_CPUS}; do
359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 535 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
360 done 536 done
361 else 537 else
362 for x in ${SPARC64_CPUS}; do 538 for x in ${SPARC64_CPUS}; do
366 542
367 export CFLAGS CXXFLAGS 543 export CFLAGS CXXFLAGS
368} 544}
369 545
370append-ldflags() { 546append-ldflags() {
547 [[ -z $* ]] && return 0
371 export LDFLAGS="${LDFLAGS} $*" 548 export LDFLAGS="${LDFLAGS} $*"
372 return 0 549 return 0
373} 550}
374 551
552# Remove flags from LDFLAGS - it's up to the ebuild to filter
553# CFLAGS and CXXFLAGS via filter-flags if they need to.
375filter-ldflags() { 554filter-ldflags() {
376 local x 555 _filter-var LDFLAGS "$@"
556 return 0
557}
377 558
378 # we do this fancy spacing stuff so as to not filter 559# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
379 # out part of a flag ... we want flag atoms ! :D 560# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
380 LDFLAGS=" ${LDFLAGS} " 561# to gcc where it needs the '-Wl,'.
562raw-ldflags() {
563 local x input="$@"
564 [[ -z ${input} ]] && input=${LDFLAGS}
565 set --
381 for x in "$@" ; do 566 for x in ${input} ; do
382 LDFLAGS="${LDFLAGS// ${x} / }" 567 x=${x#-Wl,}
568 set -- "$@" ${x//,/ }
383 done 569 done
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 570 echo "$@"
385 export LDFLAGS
386 return 0
387} 571}
388 572
389etexec-flags() { 573# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
390 # if you're not using a hardened compiler you wont need this 574# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
391 # PIC/no-pic kludge in the first place. 575# fixes.
392 has_hardened || return 0 576#
393 577# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
394 if has_pie || has_pic; then 578gcc2-flags() {
395 [ -z "`is-flag -fno-pic`" ] && 579 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`" 580 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
397 [ -z "`is-flag -nopie`" ] && 581 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
398 export CFLAGS="${CFLAGS} `test_flag -nopie`"
399 fi 582 fi
400 return 0
401}
402 583
403fstack-flags() { 584 replace-cpu-flags k6-{2,3} k6
404 if has_ssp; then 585 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
405 [ -z "`is-flag -fno-stack-protector`" ] && 586
406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 587 replace-cpu-flags pentium-mmx i586
407 fi 588 replace-cpu-flags pentium{2,3,4} i686
408 return 0 589
590 replace-cpu-flags ev6{7,8} ev6
591
592 export CFLAGS CXXFLAGS
409} 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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