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Revision 1.63 Revision 1.101
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 1.63 2004/07/18 04:59:30 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.101 2006/01/01 01:14:59 swegener Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9 5
10IUSE="debug" 6# need access to emktemp()
7inherit eutils toolchain-funcs multilib
11 8
12# 9#
13#### filter-flags <flags> #### 10#### filter-flags <flags> ####
14# Remove particular flags from C[XX]FLAGS 11# Remove particular flags from C[XX]FLAGS
15# Matches only complete flags 12# Matches only complete flags
18# Add extra flags to your current C[XX]FLAGS 15# Add extra flags to your current C[XX]FLAGS
19# 16#
20#### replace-flags <orig.flag> <new.flag> ### 17#### replace-flags <orig.flag> <new.flag> ###
21# Replace a flag by another one 18# Replace a flag by another one
22# 19#
23#### replace-cpu-flags <new.cpu> <old.cpus> ### 20#### replace-cpu-flags <old.cpus> <new.cpu> ###
24# Replace march/mcpu flags that specify <old.cpus> 21# Replace march/mcpu flags that specify <old.cpus>
25# with flags that specify <new.cpu> 22# with flags that specify <new.cpu>
26# 23#
27#### is-flag <flag> #### 24#### is-flag <flag> ####
28# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
52# Add extra flags to your current LDFLAGS 49# Add extra flags to your current LDFLAGS
53# 50#
54#### filter-ldflags <flags> #### 51#### filter-ldflags <flags> ####
55# Remove particular flags from LDFLAGS 52# Remove particular flags from LDFLAGS
56# Matches only complete flags 53# Matches only complete flags
57#
58#### etexec-flags ####
59# hooked function for hardened gcc that appends
60# -fno-pic to {C,CXX,LD}FLAGS
61# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
62# 54#
63#### fstack-flags #### 55#### fstack-flags ####
64# hooked function for hardened gcc that appends 56# hooked function for hardened gcc that appends
65# -fno-stack-protector to {C,CXX,LD}FLAGS 57# -fno-stack-protector to {C,CXX,LD}FLAGS
66# when a package is filtering -fstack-protector, -fstack-protector-all 58# when a package is filtering -fstack-protector, -fstack-protector-all
67# notice: modern automatic specs files will also suppress -fstack-protector-all 59# notice: modern automatic specs files will also suppress -fstack-protector-all
68# when only -fno-stack-protector is given 60# when only -fno-stack-protector is given
69# 61#
62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
64#
65################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler.
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
92#
70 93
71# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
72setup-allowed-flags() { 95setup-allowed-flags() {
73 if [ -z "${ALLOWED_FLAGS}" ] ; then 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
74 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 97 export ALLOWED_FLAGS="-pipe"
75 case "${ARCH}" in 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
76 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
77 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
78 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
79 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
80 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
81 esac
82 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"
83 115
84 # 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
85 # NOTE: currently -Os have issues with gcc3 and K6* arch's 117 # NOTE: currently -Os have issues with gcc3 and K6* arch's
86 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
87 return 0 119 return 0
88} 120}
89 121
90filter-flags() { 122filter-flags() {
91 local x f fset 123 local x f fset
92 declare -a new_CFLAGS new_CXXFLAGS 124 declare -a new_CFLAGS new_CXXFLAGS
93 125
94 for x in "$@" ; do 126 for x in "$@" ; do
95 case "${x}" in 127 case "${x}" in
96 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 128 -fPIC|-fpic|-fPIE|-fpie|-pie)
129 append-flags `test_flag -fno-pie`;;
97 -fstack-protector|-fstack-protector-all) fstack-flags;; 130 -fstack-protector|-fstack-protector-all)
131 fstack-flags;;
98 esac 132 esac
99 done 133 done
100 134
101 for fset in CFLAGS CXXFLAGS; do 135 for fset in CFLAGS CXXFLAGS; do
136 # Looping over the flags instead of using a global
137 # substitution ensures that we're working with flag atoms.
138 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags.
102 for f in ${!fset}; do 140 for f in ${!fset}; do
103 for x in "$@"; do 141 for x in "$@"; do
104 # Note this should work with globs like -O* 142 # Note this should work with globs like -O*
105 [[ ${f} == ${x} ]] && continue 2 143 [[ ${f} == ${x} ]] && continue 2
106 done 144 done
111 149
112 return 0 150 return 0
113} 151}
114 152
115filter-lfs-flags() { 153filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
116 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 155 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
117} 156}
118 157
119append-lfs-flags() { 158append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
120 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 160 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
121} 161}
122 162
123append-flags() { 163append-flags() {
164 [[ -z $* ]] && return 0
124 export CFLAGS="${CFLAGS} $*" 165 export CFLAGS="${CFLAGS} $*"
125 export CXXFLAGS="${CXXFLAGS} $*" 166 export CXXFLAGS="${CXXFLAGS} $*"
126 [ -n "`is-flag -fno-stack-protector`" -o \ 167 [ -n "`is-flag -fno-stack-protector`" -o \
127 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
128 return 0 169 return 0
129} 170}
130 171
131replace-flags() { 172replace-flags() {
132 # we do this fancy spacing stuff so as to not filter 173 [[ $# != 2 ]] \
133 # out part of a flag ... we want flag atoms ! :D 174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
134 CFLAGS=" ${CFLAGS} " 175 && die "replace-flags takes 2 arguments, not $#"
135 CXXFLAGS=" ${CXXFLAGS} " 176
136 CFLAGS="${CFLAGS// ${1} / ${2} }" 177 local f fset
137 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 178 declare -a new_CFLAGS new_CXXFLAGS
138 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 179
139 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 180 for fset in CFLAGS CXXFLAGS; do
140 export CFLAGS CXXFLAGS 181 # Looping over the flags instead of using a global
182 # substitution ensures that we're working with flag atoms.
183 # Otherwise globs like -O* have the potential to wipe out the
184 # list of flags.
185 for f in ${!fset}; do
186 # Note this should work with globs like -O*
187 [[ ${f} == ${1} ]] && f=${2}
188 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
189 done
190 eval export ${fset}=\${new_${fset}\[*]}
191 done
192
141 return 0 193 return 0
142} 194}
143 195
144replace-cpu-flags() { 196replace-cpu-flags() {
145 local oldcpu newcpu="$1" ; shift 197 local newcpu="$#" ; newcpu="${!newcpu}"
146 for oldcpu in "$@" ; do 198 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags
147 replace-flags -march=${oldcpu} -march=${newcpu} 201 replace-flags "-march=${1}" "-march=${newcpu}"
148 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
149 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 203 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift
150 done 205 done
151 return 0 206 return 0
152} 207}
153 208
154is-flag() { 209is-flag() {
155 local x 210 local x
156 211
157 for x in ${CFLAGS} ${CXXFLAGS} ; do 212 for x in ${CFLAGS} ${CXXFLAGS} ; do
213 # Note this should work with globs like -mcpu=ultrasparc*
158 if [ "${x}" == "$1" ] ; then 214 if [[ ${x} == ${1} ]]; then
159 echo true 215 echo true
160 return 0 216 return 0
161 fi 217 fi
162 done 218 done
163 return 1 219 return 1
196 252
197 local NEW_CFLAGS="" 253 local NEW_CFLAGS=""
198 local NEW_CXXFLAGS="" 254 local NEW_CXXFLAGS=""
199 255
200 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 256 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
201 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
202 use debug && einfo "Enabling the use of some unstable flags"
203 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
204 fi 259 fi
205 260
206 set -f # disable pathname expansion 261 set -f # disable pathname expansion
207 262
208 for x in ${CFLAGS}; do 263 for x in ${CFLAGS}; do
209 for y in ${ALLOWED_FLAGS}; do 264 for y in ${ALLOWED_FLAGS}; do
210 flag=${x%%=*} 265 flag=${x%%=*}
211 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then 266 if [ "${flag%%${y}}" = "" ] ; then
212 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 267 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
213 break 268 break
214 fi 269 fi
215 done 270 done
216 done 271 done
217 272
218 for x in ${CXXFLAGS}; do 273 for x in ${CXXFLAGS}; do
219 for y in ${ALLOWED_FLAGS}; do 274 for y in ${ALLOWED_FLAGS}; do
220 flag=${x%%=*} 275 flag=${x%%=*}
221 if [ "${flag%%${y}}" = "" ] || [ "${flag:0:5}" = "-fno-" ] || [ "${flag:0:5}" = "-mno-" ] ; then 276 if [ "${flag%%${y}}" = "" ] ; then
222 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 277 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
223 break 278 break
224 fi 279 fi
225 done 280 done
226 done 281 done
238 export CFLAGS="${NEW_CFLAGS}" 293 export CFLAGS="${NEW_CFLAGS}"
239 export CXXFLAGS="${NEW_CXXFLAGS}" 294 export CXXFLAGS="${NEW_CXXFLAGS}"
240 return 0 295 return 0
241} 296}
242 297
298test-flag-PROG() {
299 local comp=$1
300 local flags="$2"
301
302 [[ -z ${comp} || -z ${flags} ]] && \
303 return 1
304
305 local PROG=$(tc-get${comp})
306 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
307 > /dev/null 2>&1
308}
309
310# Returns true if C compiler support given flag
311test-flag-CC() { test-flag-PROG "CC" "$1"; }
312
313# Returns true if C++ compiler support given flag
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
315
316test-flags-PROG() {
317 local comp=$1
318 local flags
319 local x
320
321 shift
322
323 [[ -z ${comp} ]] && \
324 return 1
325
326 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}"
328 done
329
330 echo "${flags}"
331
332 # Just bail if we dont have any flags
333 [[ -n ${flags} ]]
334}
335
336# Returns (echo's) the given flags supported by the C compiler
337test-flags-CC() { test-flags-PROG "CC" "$@"; }
338
339# Returns (echo's) the given flags supported by the C++ compiler
340test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
341
342# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; }
345
346# Depriciated, use test-flags()
243test_flag() { 347test_flag() {
244 local cc=${CC:-gcc} ; cc=${cc%% *} 348 addwrite "/dev/stderr"
245 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then 349 ewarn "test_flag: deprecated, please use test-flags()!" >/dev/stderr
246 printf "%s\n" "$*" 350
247 return 0 351 test-flags-CC "$@"
248 fi
249 return 1
250} 352}
251 353
252test_version_info() { 354test_version_info() {
253 local cc=${CC:-gcc} ; cc=${cc%% *}
254 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 355 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
255 return 0 356 return 0
256 else 357 else
257 return 1 358 return 1
258 fi 359 fi
259} 360}
260 361
261strip-unsupported-flags() { 362strip-unsupported-flags() {
262 local NEW_CFLAGS NEW_CXXFLAGS 363 local x NEW_CFLAGS NEW_CXXFLAGS
263 364
264 for x in ${CFLAGS} ; do 365 for x in ${CFLAGS} ; do
265 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 366 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
266 done 367 done
267 for x in ${CXXFLAGS} ; do 368 for x in ${CXXFLAGS} ; do
268 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`" 369 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
269 done 370 done
270 371
271 export CFLAGS="${NEW_CFLAGS}" 372 export CFLAGS=${NEW_CFLAGS}
272 export CXXFLAGS="${NEW_CXXFLAGS}" 373 export CXXFLAGS=${NEW_CXXFLAGS}
273} 374}
274 375
275get-flag() { 376get-flag() {
276 local f findflag="$1" 377 local f findflag="$1"
277 378
287 fi 388 fi
288 done 389 done
289 return 1 390 return 1
290} 391}
291 392
393# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
292has_hardened() { 394has_hardened() {
395 addwrite "/dev/stderr"
396 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \
397 >/dev/stderr
398
293 test_version_info Hardened 399 test_version_info Hardened && return 0
294 return $? 400 # The specs file wont exist unless gcc has GCC_SPECS support
401 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
295} 402}
296 403
404# DEPRECATED - use gcc-specs-pie from toolchain-funcs
405# indicate whether PIC is set
297has_pic() { 406has_pic() {
298 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 407 addwrite "/dev/stderr"
299 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 408 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr
300 test_version_info pie && return 0
301 return 1
302}
303 409
410 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
411 ${CFLAGS/-fpic} != ${CFLAGS} || \
412 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
413}
414
415# DEPRECATED - use gcc-specs-pie from toolchain-funcs
416# indicate whether PIE is set
304has_pie() { 417has_pie() {
305 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 418 addwrite "/dev/stderr"
306 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 419 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >/dev/stderr
307 test_version_info pie && return 0 420
308 return 1 421 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
422 ${CFLAGS/-fpie} != ${CFLAGS} || \
423 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \
424 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
425 # test PIC while waiting for specs to be updated to generate __PIE__
309} 426}
310 427
428# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
429# indicate whether code for SSP is being generated for all functions
430has_ssp_all() {
431 addwrite "/dev/stderr"
432 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >/dev/stderr
433
434 # note; this matches only -fstack-protector-all
435 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
436 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
437 gcc-specs-ssp
438}
439
440# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
441# indicate whether code for SSP is being generated
311has_ssp() { 442has_ssp() {
443 addwrite "/dev/stderr"
444 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >/dev/stderr
445
446 # note; this matches both -fstack-protector and -fstack-protector-all
312 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 447 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
313 test_version_info ssp && return 0 448 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
314 return 1 449 gcc-specs-ssp
315} 450}
316 451
317has_m64() { 452has_m64() {
318 # this doesnt test if the flag is accepted, it tests if the flag 453 # this doesnt test if the flag is accepted, it tests if the flag
319 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 454 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
320 # please dont replace this function with test_flag in some future 455 # please dont replace this function with test_flag in some future
321 # clean-up! 456 # clean-up!
322 temp=`mktemp` 457
458 local temp="$(emktemp)"
323 echo "int main() { return(0); }" > ${temp}.c 459 echo "int main() { return(0); }" > "${temp}".c
324 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 460 MY_CC=$(tc-getCC)
325 ret=$? 461 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
462 local ret=$?
326 rm -f ${temp}.c 463 rm -f "${temp}".c
327 [ "$ret" != "1" ] && return 0 464 [[ ${ret} != 1 ]] && return 0
328 return 1 465 return 1
329} 466}
330 467
331has_m32() { 468has_m32() {
332 # this doesnt test if the flag is accepted, it tests if the flag 469 # this doesnt test if the flag is accepted, it tests if the flag
333 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 470 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
334 # please dont replace this function with test_flag in some future 471 # please dont replace this function with test_flag in some future
335 # clean-up! 472 # clean-up!
336 temp=`mktemp` 473
474 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
475
476 local temp=$(emktemp)
337 echo "int main() { return(0); }" > ${temp}.c 477 echo "int main() { return(0); }" > "${temp}".c
338 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1 478 MY_CC=$(tc-getCC)
339 ret=$? 479 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
480 local ret=$?
340 rm -f ${temp}.c 481 rm -f "${temp}".c
341 [ "$ret" != "1" ] && return 0 482 [[ ${ret} != 1 ]] && return 0
342 return 1 483 return 1
343} 484}
344 485
345replace-sparc64-flags() { 486replace-sparc64-flags() {
346 local SPARC64_CPUS="ultrasparc v9" 487 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
347 488
348 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 489 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
349 for x in ${SPARC64_CPUS}; do 490 for x in ${SPARC64_CPUS}; do
350 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 491 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
351 done 492 done
352 else 493 else
353 for x in ${SPARC64_CPUS}; do 494 for x in ${SPARC64_CPUS}; do
354 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 495 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
355 done 496 done
356 fi 497 fi
357 498
358 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 499 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
359 for x in ${SPARC64_CPUS}; do 500 for x in ${SPARC64_CPUS}; do
360 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 501 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
361 done 502 done
362 else 503 else
363 for x in ${SPARC64_CPUS}; do 504 for x in ${SPARC64_CPUS}; do
378 519
379 # we do this fancy spacing stuff so as to not filter 520 # we do this fancy spacing stuff so as to not filter
380 # out part of a flag ... we want flag atoms ! :D 521 # out part of a flag ... we want flag atoms ! :D
381 LDFLAGS=" ${LDFLAGS} " 522 LDFLAGS=" ${LDFLAGS} "
382 for x in "$@" ; do 523 for x in "$@" ; do
383 LDFLAGS="${LDFLAGS// ${x} / }" 524 LDFLAGS=${LDFLAGS// ${x} / }
384 done 525 done
526 [[ -z ${LDFLAGS// } ]] \
527 && LDFLAGS="" \
385 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 528 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
386 export LDFLAGS 529 export LDFLAGS
387 return 0 530 return 0
388} 531}
389 532
390etexec-flags() {
391 # if you're not using a hardened compiler you wont need this
392 # PIC/no-pic kludge in the first place.
393 has_hardened || return 0
394
395 if has_pie || has_pic; then
396 [ -z "`is-flag -fno-pic`" ] &&
397 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
398 [ -z "`is-flag -nopie`" ] &&
399 export CFLAGS="${CFLAGS} `test_flag -nopie`"
400 fi
401 return 0
402}
403
404fstack-flags() { 533fstack-flags() {
405 if has_ssp; then 534 if gcc-specs-ssp; then
406 [ -z "`is-flag -fno-stack-protector`" ] && 535 [ -z "`is-flag -fno-stack-protector`" ] &&
407 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 536 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
408 fi 537 fi
409 return 0 538 return 0
410} 539}
540
541# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
542# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
543# fixes.
544#
545# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
546gcc2-flags() {
547 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
548 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
549 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
550 fi
551
552 replace-cpu-flags k6-{2,3} k6
553 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
554
555 replace-cpu-flags pentium-mmx i586
556 replace-cpu-flags pentium{2,3,4} i686
557
558 replace-cpu-flags ev6{7,8} ev6
559
560 export CFLAGS CXXFLAGS
561}
562
563# Gets the flags needed for "NOW" binding
564bindnow-flags() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in
566 *GNU* | *'with BFD'*) # GNU ld
567 echo "-Wl,-z,now" ;;
568 *Apple*) # Darwin ld
569 echo "-bind_at_load" ;;
570 *)
571 # Some linkers just recognize -V instead of -v
572 case $($(tc-getLD) -V 2>&1 </dev/null) in
573 *Solaris*) # Solaris accept almost the same GNU options
574 echo "-Wl,-z,now" ;;
575 esac
576 ;;
577 esac
578}

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