/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.64 Revision 1.106
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 1.64 2004/07/22 15:29:10 agriffis Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.106 2006/02/19 23:18:30 vapier Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9 5
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise 6# need access to emktemp()
11# IUSE gets clobbered. 7inherit eutils toolchain-funcs multilib
12IUSE="${IUSE} debug"
13 8
14# 9#
15#### filter-flags <flags> #### 10#### filter-flags <flags> ####
16# Remove particular flags from C[XX]FLAGS 11# Remove particular flags from C[XX]FLAGS
17# Matches only complete flags 12# Matches only complete flags
20# Add extra flags to your current C[XX]FLAGS 15# Add extra flags to your current C[XX]FLAGS
21# 16#
22#### replace-flags <orig.flag> <new.flag> ### 17#### replace-flags <orig.flag> <new.flag> ###
23# Replace a flag by another one 18# Replace a flag by another one
24# 19#
25#### replace-cpu-flags <new.cpu> <old.cpus> ### 20#### replace-cpu-flags <old.cpus> <new.cpu> ###
26# Replace march/mcpu flags that specify <old.cpus> 21# Replace march/mcpu flags that specify <old.cpus>
27# with flags that specify <new.cpu> 22# with flags that specify <new.cpu>
28# 23#
29#### is-flag <flag> #### 24#### is-flag[q] <flag> ####
30# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
31# 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
32# 33#
33#### strip-flags #### 34#### strip-flags ####
34# Strip C[XX]FLAGS of everything except known 35# Strip C[XX]FLAGS of everything except known
35# good options. 36# good options.
36# 37#
55# 56#
56#### filter-ldflags <flags> #### 57#### filter-ldflags <flags> ####
57# Remove particular flags from LDFLAGS 58# Remove particular flags from LDFLAGS
58# Matches only complete flags 59# Matches only complete flags
59# 60#
60#### etexec-flags #### 61#### bindnow-flags ####
61# hooked function for hardened gcc that appends 62# 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# 63#
65#### fstack-flags #### 64################ DEPRECATED functions ################
66# hooked function for hardened gcc that appends 65# The following are still present to avoid breaking existing
67# -fno-stack-protector to {C,CXX,LD}FLAGS 66# code more than necessary; however they are deprecated. Please
68# when a package is filtering -fstack-protector, -fstack-protector-all 67# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# notice: modern automatic specs files will also suppress -fstack-protector-all 68# need to know which hardened techs are active in the compiler.
70# 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
71# 91#
72 92
73# C[XX]FLAGS that we allow in strip-flags 93# C[XX]FLAGS that we allow in strip-flags
74setup-allowed-flags() { 94setup-allowed-flags() {
75 if [ -z "${ALLOWED_FLAGS}" ] ; then 95 if [[ -z ${ALLOWED_FLAGS} ]] ; then
76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 96 export ALLOWED_FLAGS="-pipe"
77 case "${ARCH}" in 97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
83 esac
84 fi 102 fi
103 # allow a bunch of flags that negate features / control ABI
104 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
106 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
107 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
108 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
109 -mieee -mieee-with-inexact \
110 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
111 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
112 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
113 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
85 114
86 # C[XX]FLAGS that we are think is ok, but needs testing 115 # C[XX]FLAGS that we are think is ok, but needs testing
87 # NOTE: currently -Os have issues with gcc3 and K6* arch's 116 # NOTE: currently -Os have issues with gcc3 and K6* arch's
88 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 117 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
89 return 0 118 return 0
119}
120
121# inverted filters for hardened compiler. This is trying to unpick
122# the hardened compiler defaults.
123_filter-hardened() {
124 local f
125 for f in "$@" ; do
126 case "${f}" in
127 # Ideally we should only concern ourselves with PIE flags,
128 # not -fPIC or -fpic, but too many places filter -fPIC without
129 # thinking about -fPIE.
130 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
131 gcc-specs-pie || continue
132 is-flagq -nopie || append-flags -nopie;;
133 -fstack-protector)
134 gcc-specs-ssp || continue
135 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
136 -fstack-protector-all)
137 gcc-specs-ssp-to-all || continue
138 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
139 esac
140 done
141}
142
143# Remove occurrences of strings from variable given in $1
144# Strings removed are matched as globs, so for example
145# '-O*' would remove -O1, -O2 etc.
146_filter-var() {
147 local f x VAR VAL
148 declare -a new
149
150 VAR=$1
151 shift
152 eval VAL=\${${VAR}}
153 for f in ${VAL}; do
154 for x in "$@"; do
155 # Note this should work with globs like -O*
156 [[ ${f} == ${x} ]] && continue 2
157 done
158 eval new\[\${\#new\[@]}]=\${f}
159 done
160 eval export ${VAR}=\${new\[*]}
90} 161}
91 162
92filter-flags() { 163filter-flags() {
93 local x f fset 164 _filter-hardened "$@"
94 declare -a new_CFLAGS new_CXXFLAGS 165 _filter-var CFLAGS "$@"
95 166 _filter-var CXXFLAGS "$@"
96 for x in "$@" ; do
97 case "${x}" in
98 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
99 -fstack-protector|-fstack-protector-all) fstack-flags;;
100 esac
101 done
102
103 for fset in CFLAGS CXXFLAGS; do
104 # Looping over the flags instead of using a global
105 # substitution ensures that we're working with flag atoms.
106 # Otherwise globs like -O* have the potential to wipe out the
107 # list of flags.
108 for f in ${!fset}; do
109 for x in "$@"; do
110 # Note this should work with globs like -O*
111 [[ ${f} == ${x} ]] && continue 2
112 done
113 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
114 done
115 eval export ${fset}=\${new_${fset}\[*]}
116 done
117
118 return 0 167 return 0
119} 168}
120 169
121filter-lfs-flags() { 170filter-lfs-flags() {
171 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
122 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 172 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
123} 173}
124 174
125append-lfs-flags() { 175append-lfs-flags() {
176 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
126 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 177 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127} 178}
128 179
129append-flags() { 180append-flags() {
181 [[ -z $* ]] && return 0
130 export CFLAGS="${CFLAGS} $*" 182 export CFLAGS="${CFLAGS} $*"
131 export CXXFLAGS="${CXXFLAGS} $*" 183 export CXXFLAGS="${CXXFLAGS} $*"
132 [ -n "`is-flag -fno-stack-protector`" -o \
133 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
134 return 0 184 return 0
135} 185}
136 186
137replace-flags() { 187replace-flags() {
188 [[ $# != 2 ]] \
189 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
190 && die "replace-flags takes 2 arguments, not $#"
191
138 local f fset 192 local f fset
139 declare -a new_CFLAGS new_CXXFLAGS 193 declare -a new_CFLAGS new_CXXFLAGS
140 194
141 for fset in CFLAGS CXXFLAGS; do 195 for fset in CFLAGS CXXFLAGS; do
142 # Looping over the flags instead of using a global 196 # Looping over the flags instead of using a global
143 # substitution ensures that we're working with flag atoms. 197 # substitution ensures that we're working with flag atoms.
153 207
154 return 0 208 return 0
155} 209}
156 210
157replace-cpu-flags() { 211replace-cpu-flags() {
158 local oldcpu newcpu="$1" ; shift 212 local newcpu="$#" ; newcpu="${!newcpu}"
159 for oldcpu in "$@" ; do 213 while [ $# -gt 1 ] ; do
160 # quote to make sure that no globbing is done (particularly on 214 # quote to make sure that no globbing is done (particularly on
161 # ${oldcpu} prior to calling replace-flags 215 # ${oldcpu} prior to calling replace-flags
162 replace-flags "-march=${oldcpu}" "-march=${newcpu}" 216 replace-flags "-march=${1}" "-march=${newcpu}"
163 replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}" 217 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
164 replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}" 218 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
219 shift
165 done 220 done
166 return 0 221 return 0
167} 222}
168 223
169is-flag() { 224is-flagq() {
170 local x 225 local x
171 226
172 for x in ${CFLAGS} ${CXXFLAGS} ; do 227 for x in ${CFLAGS} ${CXXFLAGS} ; do
228 # Note this should work with globs like -mcpu=ultrasparc*
173 if [ "${x}" == "$1" ] ; then 229 if [[ ${x} == ${1} ]]; then
174 echo true
175 return 0 230 return 0
176 fi 231 fi
177 done 232 done
233 return 1
234}
235
236is-flag() {
237 if is-flagq ${1}; then
238 echo true
239 return 0
240 fi
241 return 1
242}
243
244is-ldflagq() {
245 local x
246
247 for x in ${LDFLAGS} ; do
248 # Note this should work with globs like -mcpu=ultrasparc*
249 if [[ ${x} == ${1} ]]; then
250 return 0
251 fi
252 done
253 return 1
254}
255
256is-ldflag() {
257 if is-ldflagq ${1}; then
258 echo true
259 return 0
260 fi
178 return 1 261 return 1
179} 262}
180 263
181filter-mfpmath() { 264filter-mfpmath() {
182 local orig_mfpmath new_math prune_math 265 local orig_mfpmath new_math prune_math
211 294
212 local NEW_CFLAGS="" 295 local NEW_CFLAGS=""
213 local NEW_CXXFLAGS="" 296 local NEW_CXXFLAGS=""
214 297
215 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 298 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
216 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
217 use debug && einfo "Enabling the use of some unstable flags"
218 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
219 fi 301 fi
220 302
221 set -f # disable pathname expansion 303 set -f # disable pathname expansion
222 304
223 for x in ${CFLAGS}; do 305 for x in ${CFLAGS}; do
224 for y in ${ALLOWED_FLAGS}; do 306 for y in ${ALLOWED_FLAGS}; do
225 flag=${x%%=*} 307 flag=${x%%=*}
226 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then 308 if [ "${flag%%${y}}" = "" ] ; then
227 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 309 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
228 break 310 break
229 fi 311 fi
230 done 312 done
231 done 313 done
232 314
233 for x in ${CXXFLAGS}; do 315 for x in ${CXXFLAGS}; do
234 for y in ${ALLOWED_FLAGS}; do 316 for y in ${ALLOWED_FLAGS}; do
235 flag=${x%%=*} 317 flag=${x%%=*}
236 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then 318 if [ "${flag%%${y}}" = "" ] ; then
237 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 319 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
238 break 320 break
239 fi 321 fi
240 done 322 done
241 done 323 done
253 export CFLAGS="${NEW_CFLAGS}" 335 export CFLAGS="${NEW_CFLAGS}"
254 export CXXFLAGS="${NEW_CXXFLAGS}" 336 export CXXFLAGS="${NEW_CXXFLAGS}"
255 return 0 337 return 0
256} 338}
257 339
340test-flag-PROG() {
341 local comp=$1
342 local flags="$2"
343
344 [[ -z ${comp} || -z ${flags} ]] && \
345 return 1
346
347 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1
350}
351
352# Returns true if C compiler support given flag
353test-flag-CC() { test-flag-PROG "CC" "$1"; }
354
355# Returns true if C++ compiler support given flag
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
357
358test-flags-PROG() {
359 local comp=$1
360 local flags
361 local x
362
363 shift
364
365 [[ -z ${comp} ]] && \
366 return 1
367
368 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags} ${x}"
370 done
371
372 echo "${flags}"
373
374 # Just bail if we dont have any flags
375 [[ -n ${flags} ]]
376}
377
378# Returns (echo's) the given flags supported by the C compiler
379test-flags-CC() { test-flags-PROG "CC" "$@"; }
380
381# Returns (echo's) the given flags supported by the C++ compiler
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383
384# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; }
387
388# Depriciated, use test-flags()
258test_flag() { 389test_flag() {
259 local cc=${CC:-gcc} ; cc=${cc%% *} 390 ewarn "test_flag: deprecated, please use test-flags()!" >&2
260 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then 391
261 printf "%s\n" "$*" 392 test-flags-CC "$@"
262 return 0
263 fi
264 return 1
265} 393}
266 394
267test_version_info() { 395test_version_info() {
268 local cc=${CC:-gcc} ; cc=${cc%% *}
269 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
270 return 0 397 return 0
271 else 398 else
272 return 1 399 return 1
273 fi 400 fi
274} 401}
275 402
276strip-unsupported-flags() { 403strip-unsupported-flags() {
277 local NEW_CFLAGS NEW_CXXFLAGS 404 local x NEW_CFLAGS NEW_CXXFLAGS
278 405
279 for x in ${CFLAGS} ; do 406 for x in ${CFLAGS} ; do
280 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 407 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
281 done 408 done
282 for x in ${CXXFLAGS} ; do 409 for x in ${CXXFLAGS} ; do
283 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`" 410 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
284 done 411 done
285 412
286 export CFLAGS="${NEW_CFLAGS}" 413 export CFLAGS=${NEW_CFLAGS}
287 export CXXFLAGS="${NEW_CXXFLAGS}" 414 export CXXFLAGS=${NEW_CXXFLAGS}
288} 415}
289 416
290get-flag() { 417get-flag() {
291 local f findflag="$1" 418 local f findflag="$1"
292 419
302 fi 429 fi
303 done 430 done
304 return 1 431 return 1
305} 432}
306 433
434# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
307has_hardened() { 435has_hardened() {
436 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
437
308 test_version_info Hardened 438 test_version_info Hardened && return 0
309 return $? 439 # The specs file wont exist unless gcc has GCC_SPECS support
440 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
310} 441}
311 442
443# DEPRECATED - use gcc-specs-pie from toolchain-funcs
444# indicate whether PIC is set
312has_pic() { 445has_pic() {
313 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 446 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
314 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
315 test_version_info pie && return 0
316 return 1
317}
318 447
448 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
449 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
450 gcc-specs-pie
451}
452
453# DEPRECATED - use gcc-specs-pie from toolchain-funcs
454# indicate whether PIE is set
319has_pie() { 455has_pie() {
320 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 456 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
321 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 457
322 test_version_info pie && return 0 458 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
323 return 1 459 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
460 gcc-specs-pie
324} 461}
325 462
463# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
464# indicate whether code for SSP is being generated for all functions
465has_ssp_all() {
466 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
467
468 # note; this matches only -fstack-protector-all
469 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
470 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
471 gcc-specs-ssp-all
472}
473
474# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
475# indicate whether code for SSP is being generated
326has_ssp() { 476has_ssp() {
477 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
478
479 # note; this matches both -fstack-protector and -fstack-protector-all
327 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 480 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
328 test_version_info ssp && return 0 481 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
329 return 1 482 gcc-specs-ssp
330} 483}
331 484
332has_m64() { 485has_m64() {
333 # this doesnt test if the flag is accepted, it tests if the flag 486 # this doesnt test if the flag is accepted, it tests if the flag
334 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 487 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
335 # please dont replace this function with test_flag in some future 488 # please dont replace this function with test_flag in some future
336 # clean-up! 489 # clean-up!
337 temp=`mktemp` 490
491 local temp="$(emktemp)"
338 echo "int main() { return(0); }" > ${temp}.c 492 echo "int main() { return(0); }" > "${temp}".c
339 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 493 MY_CC=$(tc-getCC)
340 ret=$? 494 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
495 local ret=$?
341 rm -f ${temp}.c 496 rm -f "${temp}".c
342 [ "$ret" != "1" ] && return 0 497 [[ ${ret} != 1 ]] && return 0
343 return 1 498 return 1
344} 499}
345 500
346has_m32() { 501has_m32() {
347 # this doesnt test if the flag is accepted, it tests if the flag 502 # this doesnt test if the flag is accepted, it tests if the flag
348 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 503 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349 # please dont replace this function with test_flag in some future 504 # please dont replace this function with test_flag in some future
350 # clean-up! 505 # clean-up!
351 temp=`mktemp` 506
507 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
508
509 local temp=$(emktemp)
352 echo "int main() { return(0); }" > ${temp}.c 510 echo "int main() { return(0); }" > "${temp}".c
353 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 511 MY_CC=$(tc-getCC)
354 ret=$? 512 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
513 local ret=$?
355 rm -f ${temp}.c 514 rm -f "${temp}".c
356 [ "$ret" != "1" ] && return 0 515 [[ ${ret} != 1 ]] && return 0
357 return 1 516 return 1
358} 517}
359 518
360replace-sparc64-flags() { 519replace-sparc64-flags() {
361 local SPARC64_CPUS="ultrasparc v9" 520 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
362 521
363 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 522 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
364 for x in ${SPARC64_CPUS}; do 523 for x in ${SPARC64_CPUS}; do
365 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 524 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
366 done 525 done
367 else 526 else
368 for x in ${SPARC64_CPUS}; do 527 for x in ${SPARC64_CPUS}; do
369 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 528 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
370 done 529 done
371 fi 530 fi
372 531
373 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 532 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
374 for x in ${SPARC64_CPUS}; do 533 for x in ${SPARC64_CPUS}; do
375 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 534 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
376 done 535 done
377 else 536 else
378 for x in ${SPARC64_CPUS}; do 537 for x in ${SPARC64_CPUS}; do
382 541
383 export CFLAGS CXXFLAGS 542 export CFLAGS CXXFLAGS
384} 543}
385 544
386append-ldflags() { 545append-ldflags() {
546 [[ -z $* ]] && return 0
387 export LDFLAGS="${LDFLAGS} $*" 547 export LDFLAGS="${LDFLAGS} $*"
388 return 0 548 return 0
389} 549}
390 550
551# Remove flags from LDFLAGS - it's up to the ebuild to filter
552# CFLAGS and CXXFLAGS via filter-flags if they need to.
391filter-ldflags() { 553filter-ldflags() {
392 local x 554 _filter-var LDFLAGS "$@"
555 return 0
556}
393 557
394 # we do this fancy spacing stuff so as to not filter 558# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
395 # out part of a flag ... we want flag atoms ! :D 559# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
396 LDFLAGS=" ${LDFLAGS} " 560# to gcc where it needs the '-Wl,'.
561raw-ldflags() {
562 local x input="$@"
563 [[ -z ${input} ]] && input=${LDFLAGS}
564 set --
397 for x in "$@" ; do 565 for x in ${input} ; do
398 LDFLAGS="${LDFLAGS// ${x} / }" 566 x=${x#-Wl,}
567 set -- "$@" ${x//,/ }
399 done 568 done
400 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 569 echo "$@"
401 export LDFLAGS
402 return 0
403} 570}
404 571
405etexec-flags() { 572# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
406 # if you're not using a hardened compiler you wont need this 573# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
407 # PIC/no-pic kludge in the first place. 574# fixes.
408 has_hardened || return 0 575#
409 576# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
410 if has_pie || has_pic; then 577gcc2-flags() {
411 [ -z "`is-flag -fno-pic`" ] && 578 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
412 export CFLAGS="${CFLAGS} `test_flag -fno-pic`" 579 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
413 [ -z "`is-flag -nopie`" ] && 580 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
414 export CFLAGS="${CFLAGS} `test_flag -nopie`"
415 fi 581 fi
416 return 0
417}
418 582
419fstack-flags() { 583 replace-cpu-flags k6-{2,3} k6
420 if has_ssp; then 584 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
421 [ -z "`is-flag -fno-stack-protector`" ] && 585
422 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 586 replace-cpu-flags pentium-mmx i586
423 fi 587 replace-cpu-flags pentium{2,3,4} i686
424 return 0 588
589 replace-cpu-flags ev6{7,8} ev6
590
591 export CFLAGS CXXFLAGS
425} 592}
593
594# Gets the flags needed for "NOW" binding
595bindnow-flags() {
596 case $($(tc-getLD) -v 2>&1 </dev/null) in
597 *GNU* | *'with BFD'*) # GNU ld
598 echo "-Wl,-z,now" ;;
599 *Apple*) # Darwin ld
600 echo "-bind_at_load" ;;
601 *)
602 # Some linkers just recognize -V instead of -v
603 case $($(tc-getLD) -V 2>&1 </dev/null) in
604 *Solaris*) # Solaris accept almost the same GNU options
605 echo "-Wl,-z,now" ;;
606 esac
607 ;;
608 esac
609}

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