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Revision 1.40 Revision 1.102
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 1.40 2004/03/12 11:21:15 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.102 2006/01/10 01:00:29 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()
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
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
20# 19#
21#### replace-cpu-flags <new.cpu> <old.cpus> ### 20#### replace-cpu-flags <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus> 21# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu> 22# with flags that specify <new.cpu>
24# 23#
25#### is-flag <flag> #### 24#### is-flag <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
47# will leave the user with -mfpmath=386 46# will leave the user with -mfpmath=386
48# 47#
49#### append-ldflags #### 48#### append-ldflags ####
50# Add extra flags to your current LDFLAGS 49# Add extra flags to your current LDFLAGS
51# 50#
52#### etexec-flags #### 51#### filter-ldflags <flags> ####
53# hooked function for hardened-gcc that appends 52# Remove particular flags from LDFLAGS
54# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed 53# Matches only complete flags
55# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
56# 54#
57#### fstack-flags #### 55#### fstack-flags ####
58# hooked function for hardened-gcc that appends 56# hooked function for hardened gcc that appends
59# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed 57# -fno-stack-protector to {C,CXX,LD}FLAGS
60# 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
61# 92#
62 93
63# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
64setup-allowed-flags() { 95setup-allowed-flags() {
65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
66 case "${ARCH}" in 97 export ALLOWED_FLAGS="-pipe"
67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
71 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="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
72 115
73 # C[XX]FLAGS that we are think is ok, but needs testing 116 # C[XX]FLAGS that we are think is ok, but needs testing
74 # NOTE: currently -Os have issues with gcc3 and K6* arch's 117 # NOTE: currently -Os have issues with gcc3 and K6* arch's
75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
76 return 0 119 return 0
77} 120}
78 121
79filter-flags() { 122filter-flags() {
123 local x f fset
124 declare -a new_CFLAGS new_CXXFLAGS
125
80 for x in "$@" ; do 126 for x in "$@" ; do
81 case "${x}" in 127 case "${x}" in
82 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 128 -fPIC|-fpic|-fPIE|-fpie|-pie)
129 append-flags `test_flag -fno-pie`;;
83 -fstack-protector|-fstack-protector-all) fstack-flags;; 130 -fstack-protector|-fstack-protector-all)
84 *) ;; 131 fstack-flags;;
85 esac 132 esac
86 done 133 done
87 134
88 # we do this fancy spacing stuff so as to not filter 135 for fset in CFLAGS CXXFLAGS; do
89 # out part of a flag ... we want flag atoms ! :D 136 # Looping over the flags instead of using a global
90 CFLAGS=" ${CFLAGS} " 137 # substitution ensures that we're working with flag atoms.
91 CXXFLAGS=" ${CXXFLAGS} " 138 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags.
140 for f in ${!fset}; do
92 for x in "$@" ; do 141 for x in "$@"; do
93 CFLAGS="${CFLAGS// ${x} / }" 142 # Note this should work with globs like -O*
94 CXXFLAGS="${CXXFLAGS// ${x} / }" 143 [[ ${f} == ${x} ]] && continue 2
144 done
145 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
95 done 146 done
96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 147 eval export ${fset}=\${new_${fset}\[*]}
97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 148 done
149
98 return 0 150 return 0
99} 151}
100 152
101filter-lfs-flags() { 153filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
102 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
103} 156}
104 157
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
161}
162
105append-flags() { 163append-flags() {
164 [[ -z $* ]] && return 0
106 export CFLAGS="${CFLAGS} $@" 165 export CFLAGS="${CFLAGS} $*"
107 export CXXFLAGS="${CXXFLAGS} $@" 166 export CXXFLAGS="${CXXFLAGS} $*"
108 [ "`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
109 return 0 169 return 0
110} 170}
111 171
112replace-flags() { 172replace-flags() {
113 # we do this fancy spacing stuff so as to not filter 173 [[ $# != 2 ]] \
114 # out part of a flag ... we want flag atoms ! :D 174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
115 CFLAGS=" ${CFLAGS} " 175 && die "replace-flags takes 2 arguments, not $#"
116 CXXFLAGS=" ${CXXFLAGS} " 176
117 CFLAGS="${CFLAGS// ${1} / ${2} }" 177 local f fset
118 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 178 declare -a new_CFLAGS new_CXXFLAGS
119 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 179
120 CXXFLAGS="${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
121 return 0 193 return 0
122} 194}
123 195
124replace-cpu-flags() { 196replace-cpu-flags() {
125 local newcpu="$1" ; shift 197 local newcpu="$#" ; newcpu="${!newcpu}"
126 local oldcpu="" 198 while [ $# -gt 1 ] ; do
127 for oldcpu in "$@" ; do 199 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags
128 replace-flags -march=${oldcpu} -march=${newcpu} 201 replace-flags "-march=${1}" "-march=${newcpu}"
129 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
130 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 203 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift
131 done 205 done
132 return 0 206 return 0
133} 207}
134 208
135is-flag() { 209is-flag() {
210 local x
211
136 for x in ${CFLAGS} ${CXXFLAGS} ; do 212 for x in ${CFLAGS} ${CXXFLAGS} ; do
213 # Note this should work with globs like -mcpu=ultrasparc*
137 if [ "${x}" == "$1" ] ; then 214 if [[ ${x} == ${1} ]]; then
138 echo true 215 echo true
139 return 0 216 return 0
140 fi 217 fi
141 done 218 done
142 return 1 219 return 1
143} 220}
144 221
145filter-mfpmath() { 222filter-mfpmath() {
223 local orig_mfpmath new_math prune_math
224
146 # save the original -mfpmath flag 225 # save the original -mfpmath flag
147 local orig_mfpmath="`get-flag -mfpmath`" 226 orig_mfpmath="`get-flag -mfpmath`"
148 # get the value of the current -mfpmath flag 227 # get the value of the current -mfpmath flag
149 local new_math=" `get-flag mfpmath | tr , ' '` " 228 new_math=" `get-flag mfpmath | tr , ' '` "
150 # figure out which math values are to be removed 229 # figure out which math values are to be removed
151 local prune_math="" 230 prune_math=""
152 for prune_math in "$@" ; do 231 for prune_math in "$@" ; do
153 new_math="${new_math/ ${prune_math} / }" 232 new_math="${new_math/ ${prune_math} / }"
154 done 233 done
155 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
156 235
165 fi 244 fi
166 return 0 245 return 0
167} 246}
168 247
169strip-flags() { 248strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS
250
170 setup-allowed-flags 251 setup-allowed-flags
171 252
172 local NEW_CFLAGS="" 253 local NEW_CFLAGS=""
173 local NEW_CXXFLAGS="" 254 local NEW_CXXFLAGS=""
174 255
175 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 256 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
176 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
177 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
178 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
179 fi 259 fi
180 260
181 set -f 261 set -f # disable pathname expansion
182 262
183 for x in ${CFLAGS} 263 for x in ${CFLAGS}; do
184 do
185 for y in ${ALLOWED_FLAGS} 264 for y in ${ALLOWED_FLAGS}; do
186 do
187 flag=${x%%=*} 265 flag=${x%%=*}
188 if [ "${flag%%${y}}" = "" ] 266 if [ "${flag%%${y}}" = "" ] ; then
189 then
190 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 267 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
191 break 268 break
192 fi 269 fi
193 done 270 done
194 done 271 done
195 272
196 for x in ${CXXFLAGS} 273 for x in ${CXXFLAGS}; do
197 do
198 for y in ${ALLOWED_FLAGS} 274 for y in ${ALLOWED_FLAGS}; do
199 do
200 flag=${x%%=*} 275 flag=${x%%=*}
201 if [ "${flag%%${y}}" = "" ] 276 if [ "${flag%%${y}}" = "" ] ; then
202 then
203 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 277 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
204 break 278 break
205 fi 279 fi
206 done 280 done
207 done 281 done
212 fi 286 fi
213 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
214 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
215 fi 289 fi
216 290
217 set +f 291 set +f # re-enable pathname expansion
218
219 [ `use debug` ] \
220 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
221 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
222 292
223 export CFLAGS="${NEW_CFLAGS}" 293 export CFLAGS="${NEW_CFLAGS}"
224 export CXXFLAGS="${NEW_CXXFLAGS}" 294 export CXXFLAGS="${NEW_CXXFLAGS}"
225 return 0 295 return 0
226} 296}
227 297
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()
228test_flag() { 347test_flag() {
229 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 348 addwrite "/dev/stderr"
230 echo "$@" 349 ewarn "test_flag: deprecated, please use test-flags()!" >/dev/stderr
350
351 test-flags-CC "$@"
352}
353
354test_version_info() {
355 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
231 return 0 356 return 0
232 fi 357 else
233 return 1 358 return 1
359 fi
234} 360}
235 361
236strip-unsupported-flags() { 362strip-unsupported-flags() {
363 local x NEW_CFLAGS NEW_CXXFLAGS
364
237 for x in ${CFLAGS} ; do 365 for x in ${CFLAGS} ; do
238 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 366 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
239 done 367 done
240 for x in ${CXXFLAGS} ; do 368 for x in ${CXXFLAGS} ; do
241 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" 369 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
242 done 370 done
243 371
244 export CFLAGS="${NEW_CFLAGS}" 372 export CFLAGS=${NEW_CFLAGS}
245 export CXXFLAGS="${NEW_CXXFLAGS}" 373 export CXXFLAGS=${NEW_CXXFLAGS}
246} 374}
247 375
248get-flag() { 376get-flag() {
377 local f findflag="$1"
378
249 # this code looks a little flaky but seems to work for 379 # this code looks a little flaky but seems to work for
250 # everything we want ... 380 # everything we want ...
251 # for example, if CFLAGS="-march=i686": 381 # for example, if CFLAGS="-march=i686":
252 # `get-flags -march` == "-march=i686" 382 # `get-flag -march` == "-march=i686"
253 # `get-flags march` == "i686" 383 # `get-flag march` == "i686"
254 local findflag="$1"
255 for f in ${CFLAGS} ${CXXFLAGS} ; do 384 for f in ${CFLAGS} ${CXXFLAGS} ; do
256 if [ "${f/${findflag}}" != "${f}" ] ; then 385 if [ "${f/${findflag}}" != "${f}" ] ; then
257 echo "${f/-${findflag}=}" 386 printf "%s\n" "${f/-${findflag}=}"
258 return 0 387 return 0
259 fi 388 fi
260 done 389 done
261 return 1 390 return 1
262} 391}
263 392
393# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
394has_hardened() {
395 addwrite "/dev/stderr"
396 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \
397 >/dev/stderr
398
399 test_version_info Hardened && return 0
400 # The specs file wont exist unless gcc has GCC_SPECS support
401 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
402}
403
404# DEPRECATED - use gcc-specs-pie from toolchain-funcs
405# indicate whether PIC is set
406has_pic() {
407 addwrite "/dev/stderr"
408 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr
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
417has_pie() {
418 addwrite "/dev/stderr"
419 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >/dev/stderr
420
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__
426}
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
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
447 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
448 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
449 gcc-specs-ssp
450}
451
452has_m64() {
453 # this doesnt test if the flag is accepted, it tests if the flag
454 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
455 # please dont replace this function with test_flag in some future
456 # clean-up!
457
458 local temp="$(emktemp)"
459 echo "int main() { return(0); }" > "${temp}".c
460 MY_CC=$(tc-getCC)
461 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
462 local ret=$?
463 rm -f "${temp}".c
464 [[ ${ret} != 1 ]] && return 0
465 return 1
466}
467
468has_m32() {
469 # this doesnt test if the flag is accepted, it tests if the flag
470 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
471 # please dont replace this function with test_flag in some future
472 # clean-up!
473
474 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
475
476 local temp=$(emktemp)
477 echo "int main() { return(0); }" > "${temp}".c
478 MY_CC=$(tc-getCC)
479 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
480 local ret=$?
481 rm -f "${temp}".c
482 [[ ${ret} != 1 ]] && return 0
483 return 1
484}
485
264replace-sparc64-flags() { 486replace-sparc64-flags() {
265 local SPARC64_CPUS="ultrasparc v9" 487 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
266 488
267 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 489 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
268 then
269 for x in ${SPARC64_CPUS} 490 for x in ${SPARC64_CPUS}; do
270 do
271 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 491 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
272 done 492 done
273 else 493 else
274 for x in ${SPARC64_CPUS} 494 for x in ${SPARC64_CPUS}; do
275 do
276 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 495 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
277 done 496 done
278 fi 497 fi
279 498
280 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 499 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
281 then
282 for x in ${SPARC64_CPUS} 500 for x in ${SPARC64_CPUS}; do
283 do
284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 501 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
285 done 502 done
286 else 503 else
287 for x in ${SPARC64_CPUS} 504 for x in ${SPARC64_CPUS}; do
288 do
289 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 505 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
290 done 506 done
291 fi 507 fi
508
509 export CFLAGS CXXFLAGS
292} 510}
293 511
294append-ldflags() { 512append-ldflags() {
513 export LDFLAGS="${LDFLAGS} $*"
514 return 0
515}
516
517filter-ldflags() {
518 local x
519
520 # we do this fancy spacing stuff so as to not filter
521 # out part of a flag ... we want flag atoms ! :D
295 LDFLAGS="${LDFLAGS} $@" 522 LDFLAGS=" ${LDFLAGS} "
523 for x in "$@" ; do
524 LDFLAGS=${LDFLAGS// ${x} / }
525 done
526 [[ -z ${LDFLAGS// } ]] \
527 && LDFLAGS="" \
528 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
529 export LDFLAGS
296 return 0 530 return 0
297} 531}
298 532
299etexec-flags() { 533# Turn C style ldflags (-Wl,-foo) into straight ldflags
300 has_version sys-devel/hardened-gcc 534raw-ldflags() {
301 if [ $? == 0 ] ; then 535 local x input="$@"
302 if [ "`is-flag -yet_exec`" != "true" ]; then 536 [[ -z ${input} ]] && input=${LDFLAGS}
303 debug-print ">>> appending flags -yet_exec" 537 set --
304 append-flags -yet_exec 538 for x in ${input} ; do
305 append-ldflags -yet_exec 539 set -- "$@" ${x#-Wl,}
306 fi 540 done
307 fi 541 echo "$@"
308} 542}
309 543
310fstack-flags() { 544fstack-flags() {
311 has_version sys-devel/hardened-gcc 545 if gcc-specs-ssp; then
312 if [ $? == 0 ] ; then 546 [ -z "`is-flag -fno-stack-protector`" ] &&
313 if [ "`is-flag -yno_propolice`" != "true" ]; then 547 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
314 debug-print ">>> appending flags -yno_propolice"
315 append-flags -yno_propolice
316 append-ldflags -yno_propolice
317 fi 548 fi
318 fi 549 return 0
319} 550}
551
552# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
553# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
554# fixes.
555#
556# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
557gcc2-flags() {
558 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
559 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
560 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
561 fi
562
563 replace-cpu-flags k6-{2,3} k6
564 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
565
566 replace-cpu-flags pentium-mmx i586
567 replace-cpu-flags pentium{2,3,4} i686
568
569 replace-cpu-flags ev6{7,8} ev6
570
571 export CFLAGS CXXFLAGS
572}
573
574# Gets the flags needed for "NOW" binding
575bindnow-flags() {
576 case $($(tc-getLD) -v 2>&1 </dev/null) in
577 *GNU* | *'with BFD'*) # GNU ld
578 echo "-Wl,-z,now" ;;
579 *Apple*) # Darwin ld
580 echo "-bind_at_load" ;;
581 *)
582 # Some linkers just recognize -V instead of -v
583 case $($(tc-getLD) -V 2>&1 </dev/null) in
584 *Solaris*) # Solaris accept almost the same GNU options
585 echo "-Wl,-z,now" ;;
586 esac
587 ;;
588 esac
589}

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