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Revision 1.36 Revision 1.104
1# Copyright 1999-2003 Gentoo Technologies, Inc. 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 1.36 2004/02/21 07:07:56 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.104 2006/01/14 10:52:12 kevquinn Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic 5
8INHERITED="$INHERITED $ECLASS" 6# need access to emktemp()
7inherit eutils toolchain-funcs multilib
9 8
10# 9#
11#### filter-flags <flags> #### 10#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS 11# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags 12# Matches only complete flags
15#### append-flags <flags> #### 14#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS 15# Add extra flags to your current C[XX]FLAGS
17# 16#
18#### replace-flags <orig.flag> <new.flag> ### 17#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one 18# Replace a flag by another one
19#
20#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu>
20# 23#
21#### is-flag <flag> #### 24#### is-flag <flag> ####
22# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
23# Matches only complete a flag 26# Matches only complete a flag
24# 27#
43# will leave the user with -mfpmath=386 46# will leave the user with -mfpmath=386
44# 47#
45#### append-ldflags #### 48#### append-ldflags ####
46# Add extra flags to your current LDFLAGS 49# Add extra flags to your current LDFLAGS
47# 50#
48#### etexec-flags #### 51#### filter-ldflags <flags> ####
49# hooked function for hardened-gcc that appends 52# Remove particular flags from LDFLAGS
50# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed 53# Matches only complete flags
51# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
52# 54#
53#### fstack-flags #### 55#### fstack-flags ####
54# hooked function for hardened-gcc that appends 56# hooked function for hardened gcc that appends
55# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed 57# -fno-stack-protector to {C,CXX,LD}FLAGS
56# and a package is filtering -fstack-protector, -fstack-protector-all 58# when a package is filtering -fstack-protector, -fstack-protector-all
59# notice: modern automatic specs files will also suppress -fstack-protector-all
60# when only -fno-stack-protector is given
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
57# 92#
58 93
59# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
60setup-allowed-flags() { 95setup-allowed-flags() {
61 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
62 case "${ARCH}" in 97 export ALLOWED_FLAGS="-pipe"
63 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
64 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
65 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
66 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
67 esac 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
103 fi
104 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
68 115
69 # C[XX]FLAGS that we are think is ok, but needs testing 116 # C[XX]FLAGS that we are think is ok, but needs testing
70 # NOTE: currently -Os have issues with gcc3 and K6* arch's 117 # NOTE: currently -Os have issues with gcc3 and K6* arch's
71 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
72 return 0 119 return 0
73} 120}
74 121
75filter-flags() { 122filter-flags() {
123 local x f fset
124 declare -a new_CFLAGS new_CXXFLAGS
125
76 for x in "$@" ; do 126 for x in "$@" ; do
77 case "${x}" in 127 case "${x}" in
78 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;; 128 -fPIC|-fpic|-fPIE|-fpie|-pie)
129 append-flags `test_flag -fno-pie`;;
79 -fstack-protector|-fstack-protector-all) fstack-flags;; 130 -fstack-protector|-fstack-protector-all)
80 *) ;; 131 fstack-flags;;
81 esac 132 esac
82 done 133 done
83 134
84 # we do this fancy spacing stuff so as to not filter 135 for fset in CFLAGS CXXFLAGS; do
85 # out part of a flag ... we want flag atoms ! :D 136 # Looping over the flags instead of using a global
86 CFLAGS=" ${CFLAGS} " 137 # substitution ensures that we're working with flag atoms.
87 CXXFLAGS=" ${CXXFLAGS} " 138 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags.
140 for f in ${!fset}; do
88 for x in "$@" ; do 141 for x in "$@"; do
89 CFLAGS="${CFLAGS/ ${x} / }" 142 # Note this should work with globs like -O*
90 CXXFLAGS="${CXXFLAGS/ ${x} / }" 143 [[ ${f} == ${x} ]] && continue 2
144 done
145 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
91 done 146 done
92 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 147 eval export ${fset}=\${new_${fset}\[*]}
93 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 148 done
149
94 return 0 150 return 0
151}
152
153filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
155 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
156}
157
158append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
160 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
95} 161}
96 162
97append-flags() { 163append-flags() {
164 [[ -z $* ]] && return 0
98 export CFLAGS="${CFLAGS} $@" 165 export CFLAGS="${CFLAGS} $*"
99 export CXXFLAGS="${CXXFLAGS} $@" 166 export CXXFLAGS="${CXXFLAGS} $*"
100 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 167 [ -n "`is-flag -fno-stack-protector`" -o \
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
101 return 0 169 return 0
102} 170}
103 171
104replace-flags() { 172replace-flags() {
105 # we do this fancy spacing stuff so as to not filter 173 [[ $# != 2 ]] \
106 # out part of a flag ... we want flag atoms ! :D 174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
107 CFLAGS=" ${CFLAGS} " 175 && die "replace-flags takes 2 arguments, not $#"
108 CXXFLAGS=" ${CXXFLAGS} " 176
109 CFLAGS="${CFLAGS/ ${1} / ${2} }" 177 local f fset
110 CXXFLAGS="${CXXFLAGS/ ${1} / ${2} }" 178 declare -a new_CFLAGS new_CXXFLAGS
111 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 179
112 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 180 for fset in CFLAGS CXXFLAGS; do
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
193 return 0
194}
195
196replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift
205 done
113 return 0 206 return 0
114} 207}
115 208
116is-flag() { 209is-flag() {
210 local x
211
117 for x in ${CFLAGS} ${CXXFLAGS} ; do 212 for x in ${CFLAGS} ${CXXFLAGS} ; do
213 # Note this should work with globs like -mcpu=ultrasparc*
118 if [ "${x}" == "$1" ] ; then 214 if [[ ${x} == ${1} ]]; then
119 echo true 215 echo true
120 return 0 216 return 0
121 fi 217 fi
122 done 218 done
123 return 1 219 return 1
124} 220}
125 221
126filter-mfpmath() { 222filter-mfpmath() {
223 local orig_mfpmath new_math prune_math
224
127 # save the original -mfpmath flag 225 # save the original -mfpmath flag
128 local orig_mfpmath="`get-flag -mfpmath`" 226 orig_mfpmath="`get-flag -mfpmath`"
129 # get the value of the current -mfpmath flag 227 # get the value of the current -mfpmath flag
130 local new_math=" `get-flag mfpmath | tr , ' '` " 228 new_math=" `get-flag mfpmath | tr , ' '` "
131 # figure out which math values are to be removed 229 # figure out which math values are to be removed
132 local prune_math="" 230 prune_math=""
133 for prune_math in "$@" ; do 231 for prune_math in "$@" ; do
134 new_math="${new_math/ ${prune_math} / }" 232 new_math="${new_math/ ${prune_math} / }"
135 done 233 done
136 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
137 235
146 fi 244 fi
147 return 0 245 return 0
148} 246}
149 247
150strip-flags() { 248strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS
250
151 setup-allowed-flags 251 setup-allowed-flags
152 252
153 local NEW_CFLAGS="" 253 local NEW_CFLAGS=""
154 local NEW_CXXFLAGS="" 254 local NEW_CXXFLAGS=""
155 255
156 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 256 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
157 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
158 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
159 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
160 fi 259 fi
161 260
162 set -f 261 set -f # disable pathname expansion
163 262
164 for x in ${CFLAGS} 263 for x in ${CFLAGS}; do
165 do
166 for y in ${ALLOWED_FLAGS} 264 for y in ${ALLOWED_FLAGS}; do
167 do
168 flag=${x%%=*} 265 flag=${x%%=*}
169 if [ "${flag%%${y}}" = "" ] 266 if [ "${flag%%${y}}" = "" ] ; then
170 then
171 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 267 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
172 break 268 break
173 fi 269 fi
174 done 270 done
175 done 271 done
176 272
177 for x in ${CXXFLAGS} 273 for x in ${CXXFLAGS}; do
178 do
179 for y in ${ALLOWED_FLAGS} 274 for y in ${ALLOWED_FLAGS}; do
180 do
181 flag=${x%%=*} 275 flag=${x%%=*}
182 if [ "${flag%%${y}}" = "" ] 276 if [ "${flag%%${y}}" = "" ] ; then
183 then
184 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 277 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
185 break 278 break
186 fi 279 fi
187 done 280 done
188 done 281 done
193 fi 286 fi
194 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
195 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
196 fi 289 fi
197 290
198 set +f 291 set +f # re-enable pathname expansion
199
200 [ `use debug` ] \
201 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
202 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
203 292
204 export CFLAGS="${NEW_CFLAGS}" 293 export CFLAGS="${NEW_CFLAGS}"
205 export CXXFLAGS="${NEW_CXXFLAGS}" 294 export CXXFLAGS="${NEW_CXXFLAGS}"
206 return 0 295 return 0
207} 296}
208 297
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# Deprecated, use test-flags()
209test_flag() { 347test_flag() {
210 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 348 ewarn "test_flag: deprecated, please use test-flags()!" >&2
211 echo "$@" 349
350 test-flags-CC "$@"
351}
352
353test_version_info() {
354 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
212 return 0 355 return 0
213 fi 356 else
214 return 1 357 return 1
358 fi
215} 359}
216 360
217strip-unsupported-flags() { 361strip-unsupported-flags() {
362 local x NEW_CFLAGS NEW_CXXFLAGS
363
218 for x in ${CFLAGS} ; do 364 for x in ${CFLAGS} ; do
219 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 365 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
220 done 366 done
221 for x in ${CXXFLAGS} ; do 367 for x in ${CXXFLAGS} ; do
222 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" 368 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
223 done 369 done
224 370
225 export CFLAGS="${NEW_CFLAGS}" 371 export CFLAGS=${NEW_CFLAGS}
226 export CXXFLAGS="${NEW_CXXFLAGS}" 372 export CXXFLAGS=${NEW_CXXFLAGS}
227} 373}
228 374
229get-flag() { 375get-flag() {
376 local f findflag="$1"
377
230 # this code looks a little flaky but seems to work for 378 # this code looks a little flaky but seems to work for
231 # everything we want ... 379 # everything we want ...
232 # for example, if CFLAGS="-march=i686": 380 # for example, if CFLAGS="-march=i686":
233 # `get-flags -march` == "-march=i686" 381 # `get-flag -march` == "-march=i686"
234 # `get-flags march` == "i686" 382 # `get-flag march` == "i686"
235 local findflag="$1"
236 for f in ${CFLAGS} ${CXXFLAGS} ; do 383 for f in ${CFLAGS} ${CXXFLAGS} ; do
237 if [ "${f/${findflag}}" != "${f}" ] ; then 384 if [ "${f/${findflag}}" != "${f}" ] ; then
238 echo "${f/-${findflag}=}" 385 printf "%s\n" "${f/-${findflag}=}"
239 return 0 386 return 0
240 fi 387 fi
241 done 388 done
242 return 1 389 return 1
243} 390}
244 391
392# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
393has_hardened() {
394 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
395
396 test_version_info Hardened && return 0
397 # The specs file wont exist unless gcc has GCC_SPECS support
398 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
399}
400
401# DEPRECATED - use gcc-specs-pie from toolchain-funcs
402# indicate whether PIC is set
403has_pic() {
404 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
405
406 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
407 ${CFLAGS/-fpic} != ${CFLAGS} || \
408 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
409}
410
411# DEPRECATED - use gcc-specs-pie from toolchain-funcs
412# indicate whether PIE is set
413has_pie() {
414 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
415
416 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
417 ${CFLAGS/-fpie} != ${CFLAGS} || \
418 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \
419 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
420 # test PIC while waiting for specs to be updated to generate __PIE__
421}
422
423# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
424# indicate whether code for SSP is being generated for all functions
425has_ssp_all() {
426 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
427
428 # note; this matches only -fstack-protector-all
429 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
430 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
431 gcc-specs-ssp
432}
433
434# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
435# indicate whether code for SSP is being generated
436has_ssp() {
437 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
438
439 # note; this matches both -fstack-protector and -fstack-protector-all
440 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
441 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
442 gcc-specs-ssp
443}
444
445has_m64() {
446 # this doesnt test if the flag is accepted, it tests if the flag
447 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
448 # please dont replace this function with test_flag in some future
449 # clean-up!
450
451 local temp="$(emktemp)"
452 echo "int main() { return(0); }" > "${temp}".c
453 MY_CC=$(tc-getCC)
454 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
455 local ret=$?
456 rm -f "${temp}".c
457 [[ ${ret} != 1 ]] && return 0
458 return 1
459}
460
461has_m32() {
462 # this doesnt test if the flag is accepted, it tests if the flag
463 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
464 # please dont replace this function with test_flag in some future
465 # clean-up!
466
467 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
468
469 local temp=$(emktemp)
470 echo "int main() { return(0); }" > "${temp}".c
471 MY_CC=$(tc-getCC)
472 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
473 local ret=$?
474 rm -f "${temp}".c
475 [[ ${ret} != 1 ]] && return 0
476 return 1
477}
478
245replace-sparc64-flags() { 479replace-sparc64-flags() {
246 local SPARC64_CPUS="ultrasparc v9" 480 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
247 481
248 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 482 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
249 then
250 for x in ${SPARC64_CPUS} 483 for x in ${SPARC64_CPUS}; do
251 do
252 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 484 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
253 done 485 done
254 else 486 else
255 for x in ${SPARC64_CPUS} 487 for x in ${SPARC64_CPUS}; do
256 do
257 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 488 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
258 done 489 done
259 fi 490 fi
260 491
261 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 492 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
262 then
263 for x in ${SPARC64_CPUS} 493 for x in ${SPARC64_CPUS}; do
264 do
265 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 494 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
266 done 495 done
267 else 496 else
268 for x in ${SPARC64_CPUS} 497 for x in ${SPARC64_CPUS}; do
269 do
270 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 498 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
271 done 499 done
272 fi 500 fi
501
502 export CFLAGS CXXFLAGS
273} 503}
274 504
275append-ldflags() { 505append-ldflags() {
506 export LDFLAGS="${LDFLAGS} $*"
507 return 0
508}
509
510filter-ldflags() {
511 local x
512
513 # we do this fancy spacing stuff so as to not filter
514 # out part of a flag ... we want flag atoms ! :D
276 LDFLAGS="${LDFLAGS} $@" 515 LDFLAGS=" ${LDFLAGS} "
516 for x in "$@" ; do
517 LDFLAGS=${LDFLAGS// ${x} / }
518 done
519 [[ -z ${LDFLAGS// } ]] \
520 && LDFLAGS="" \
521 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
522 export LDFLAGS
277 return 0 523 return 0
278} 524}
279 525
280etexec-flags() { 526# Turn C style ldflags (-Wl,-foo) into straight ldflags
281 has_version sys-devel/hardened-gcc 527raw-ldflags() {
282 if [ $? == 0 ] ; then 528 local x input="$@"
283 if [ "`is-flag -yet_exec`" != "true" ]; then 529 [[ -z ${input} ]] && input=${LDFLAGS}
284 debug-print ">>> appending flags -yet_exec" 530 set --
285 append-flags -yet_exec 531 for x in ${input} ; do
286 append-ldflags -yet_exec 532 x=${x#-Wl,}
287 fi 533 set -- "$@" ${x//,/ }
288 fi 534 done
535 echo "$@"
289} 536}
290 537
291fstack-flags() { 538fstack-flags() {
292 has_version sys-devel/hardened-gcc 539 if gcc-specs-ssp; then
293 if [ $? == 0 ] ; then 540 [ -z "`is-flag -fno-stack-protector`" ] &&
294 if [ "`is-flag -yno_propolice`" != "true" ]; then 541 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
295 debug-print ">>> appending flags -yno_propolice"
296 append-flags -yno_propolice
297 append-ldflags -yno_propolice
298 fi 542 fi
299 fi 543 return 0
300} 544}
545
546# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
547# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
548# fixes.
549#
550# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
551gcc2-flags() {
552 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
553 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
554 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
555 fi
556
557 replace-cpu-flags k6-{2,3} k6
558 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
559
560 replace-cpu-flags pentium-mmx i586
561 replace-cpu-flags pentium{2,3,4} i686
562
563 replace-cpu-flags ev6{7,8} ev6
564
565 export CFLAGS CXXFLAGS
566}
567
568# Gets the flags needed for "NOW" binding
569bindnow-flags() {
570 case $($(tc-getLD) -v 2>&1 </dev/null) in
571 *GNU* | *'with BFD'*) # GNU ld
572 echo "-Wl,-z,now" ;;
573 *Apple*) # Darwin ld
574 echo "-bind_at_load" ;;
575 *)
576 # Some linkers just recognize -V instead of -v
577 case $($(tc-getLD) -V 2>&1 </dev/null) in
578 *Solaris*) # Solaris accept almost the same GNU options
579 echo "-Wl,-z,now" ;;
580 esac
581 ;;
582 esac
583}

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