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Revision 1.41 Revision 1.107
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 1.41 2004/03/16 21:37:09 solar Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.107 2006/04/15 00:44:16 vapier Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic 5
8INHERITED="$INHERITED $ECLASS" 6# need access to emktemp()
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[q] <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
27# 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
28# 33#
29#### strip-flags #### 34#### strip-flags ####
30# Strip C[XX]FLAGS of everything except known 35# Strip C[XX]FLAGS of everything except known
31# good options. 36# good options.
32# 37#
51# 56#
52#### filter-ldflags <flags> #### 57#### filter-ldflags <flags> ####
53# Remove particular flags from LDFLAGS 58# Remove particular flags from LDFLAGS
54# Matches only complete flags 59# Matches only complete flags
55# 60#
56#### etexec-flags #### 61#### bindnow-flags ####
57# hooked function for hardened-gcc that appends 62# Returns the flags to enable "now" binding in the current selected linker.
58# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
59# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
60# 63#
61#### fstack-flags #### 64################ DEPRECATED functions ################
62# hooked function for hardened-gcc that appends 65# The following are still present to avoid breaking existing
63# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed 66# code more than necessary; however they are deprecated. Please
64# and a package is filtering -fstack-protector, -fstack-protector-all 67# use gcc-specs-* from toolchain-funcs.eclass instead, if you
68# need to know which hardened techs are active in the compiler.
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
65# 91#
66 92
67# C[XX]FLAGS that we allow in strip-flags 93# C[XX]FLAGS that we allow in strip-flags
68setup-allowed-flags() { 94setup-allowed-flags() {
69 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 95 if [[ -z ${ALLOWED_FLAGS} ]] ; then
70 case "${ARCH}" in 96 export ALLOWED_FLAGS="-pipe"
71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 97 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
72 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
73 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
74 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
75 esac 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
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"
76 115
77 # 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
78 # NOTE: currently -Os have issues with gcc3 and K6* arch's 117 # NOTE: currently -Os have issues with gcc3 and K6* arch's
79 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
80 return 0 119 return 0
120}
121
122# inverted filters for hardened compiler. This is trying to unpick
123# the hardened compiler defaults.
124_filter-hardened() {
125 local f
126 for f in "$@" ; do
127 case "${f}" in
128 # Ideally we should only concern ourselves with PIE flags,
129 # not -fPIC or -fpic, but too many places filter -fPIC without
130 # thinking about -fPIE.
131 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
132 gcc-specs-pie || continue
133 is-flagq -nopie || append-flags -nopie;;
134 -fstack-protector)
135 gcc-specs-ssp || continue
136 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
137 -fstack-protector-all)
138 gcc-specs-ssp-to-all || continue
139 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
140 esac
141 done
142}
143
144# Remove occurrences of strings from variable given in $1
145# Strings removed are matched as globs, so for example
146# '-O*' would remove -O1, -O2 etc.
147_filter-var() {
148 local f x VAR VAL
149 declare -a new
150
151 VAR=$1
152 shift
153 eval VAL=\${${VAR}}
154 for f in ${VAL}; do
155 for x in "$@"; do
156 # Note this should work with globs like -O*
157 [[ ${f} == ${x} ]] && continue 2
158 done
159 eval new\[\${\#new\[@]}]=\${f}
160 done
161 eval export ${VAR}=\${new\[*]}
81} 162}
82 163
83filter-flags() { 164filter-flags() {
84 for x in "$@" ; do 165 _filter-hardened "$@"
85 case "${x}" in 166 _filter-var CFLAGS "$@"
86 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 167 _filter-var CXXFLAGS "$@"
87 -fstack-protector|-fstack-protector-all) fstack-flags;;
88 *) ;;
89 esac
90 done
91
92 # we do this fancy spacing stuff so as to not filter
93 # out part of a flag ... we want flag atoms ! :D
94 CFLAGS=" ${CFLAGS} "
95 CXXFLAGS=" ${CXXFLAGS} "
96 for x in "$@" ; do
97 CFLAGS="${CFLAGS// ${x} / }"
98 CXXFLAGS="${CXXFLAGS// ${x} / }"
99 done
100 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
101 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
102 return 0 168 return 0
103} 169}
104 170
105filter-lfs-flags() { 171filter-lfs-flags() {
172 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
106 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 173 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
107} 174}
108 175
176append-lfs-flags() {
177 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
178 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179}
180
109append-flags() { 181append-flags() {
182 [[ -z $* ]] && return 0
110 export CFLAGS="${CFLAGS} $@" 183 export CFLAGS="${CFLAGS} $*"
111 export CXXFLAGS="${CXXFLAGS} $@" 184 export CXXFLAGS="${CXXFLAGS} $*"
112 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
113 return 0 185 return 0
114} 186}
115 187
116replace-flags() { 188replace-flags() {
117 # we do this fancy spacing stuff so as to not filter 189 [[ $# != 2 ]] \
118 # out part of a flag ... we want flag atoms ! :D 190 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
119 CFLAGS=" ${CFLAGS} " 191 && die "replace-flags takes 2 arguments, not $#"
120 CXXFLAGS=" ${CXXFLAGS} " 192
121 CFLAGS="${CFLAGS// ${1} / ${2} }" 193 local f fset
122 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 194 declare -a new_CFLAGS new_CXXFLAGS
123 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 195
124 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 196 for fset in CFLAGS CXXFLAGS; do
197 # Looping over the flags instead of using a global
198 # substitution ensures that we're working with flag atoms.
199 # Otherwise globs like -O* have the potential to wipe out the
200 # list of flags.
201 for f in ${!fset}; do
202 # Note this should work with globs like -O*
203 [[ ${f} == ${1} ]] && f=${2}
204 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
205 done
206 eval export ${fset}=\${new_${fset}\[*]}
207 done
208
125 return 0 209 return 0
126} 210}
127 211
128replace-cpu-flags() { 212replace-cpu-flags() {
129 local newcpu="$1" ; shift 213 local newcpu="$#" ; newcpu="${!newcpu}"
130 local oldcpu="" 214 while [ $# -gt 1 ] ; do
131 for oldcpu in "$@" ; do 215 # quote to make sure that no globbing is done (particularly on
216 # ${oldcpu} prior to calling replace-flags
132 replace-flags -march=${oldcpu} -march=${newcpu} 217 replace-flags "-march=${1}" "-march=${newcpu}"
133 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 218 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
134 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 219 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
220 shift
135 done 221 done
136 return 0 222 return 0
137} 223}
138 224
139is-flag() { 225is-flagq() {
226 local x
227
140 for x in ${CFLAGS} ${CXXFLAGS} ; do 228 for x in ${CFLAGS} ${CXXFLAGS} ; do
229 # Note this should work with globs like -mcpu=ultrasparc*
141 if [ "${x}" == "$1" ] ; then 230 if [[ ${x} == ${1} ]]; then
142 echo true
143 return 0 231 return 0
144 fi 232 fi
145 done 233 done
146 return 1 234 return 1
147} 235}
148 236
237is-flag() {
238 if is-flagq ${1}; then
239 echo true
240 return 0
241 fi
242 return 1
243}
244
245is-ldflagq() {
246 local x
247
248 for x in ${LDFLAGS} ; do
249 # Note this should work with globs like -mcpu=ultrasparc*
250 if [[ ${x} == ${1} ]]; then
251 return 0
252 fi
253 done
254 return 1
255}
256
257is-ldflag() {
258 if is-ldflagq ${1}; then
259 echo true
260 return 0
261 fi
262 return 1
263}
264
149filter-mfpmath() { 265filter-mfpmath() {
266 local orig_mfpmath new_math prune_math
267
150 # save the original -mfpmath flag 268 # save the original -mfpmath flag
151 local orig_mfpmath="`get-flag -mfpmath`" 269 orig_mfpmath="`get-flag -mfpmath`"
152 # get the value of the current -mfpmath flag 270 # get the value of the current -mfpmath flag
153 local new_math=" `get-flag mfpmath | tr , ' '` " 271 new_math=" `get-flag mfpmath | tr , ' '` "
154 # figure out which math values are to be removed 272 # figure out which math values are to be removed
155 local prune_math="" 273 prune_math=""
156 for prune_math in "$@" ; do 274 for prune_math in "$@" ; do
157 new_math="${new_math/ ${prune_math} / }" 275 new_math="${new_math/ ${prune_math} / }"
158 done 276 done
159 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 277 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
160 278
169 fi 287 fi
170 return 0 288 return 0
171} 289}
172 290
173strip-flags() { 291strip-flags() {
292 local x y flag NEW_CFLAGS NEW_CXXFLAGS
293
174 setup-allowed-flags 294 setup-allowed-flags
175 295
176 local NEW_CFLAGS="" 296 local NEW_CFLAGS=""
177 local NEW_CXXFLAGS="" 297 local NEW_CXXFLAGS=""
178 298
179 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 299 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
180 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 300 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
181 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
182 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 301 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
183 fi 302 fi
184 303
185 set -f 304 set -f # disable pathname expansion
186 305
187 for x in ${CFLAGS} 306 for x in ${CFLAGS}; do
188 do
189 for y in ${ALLOWED_FLAGS} 307 for y in ${ALLOWED_FLAGS}; do
190 do
191 flag=${x%%=*} 308 flag=${x%%=*}
192 if [ "${flag%%${y}}" = "" ] 309 if [ "${flag%%${y}}" = "" ] ; then
193 then
194 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 310 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
195 break 311 break
196 fi 312 fi
197 done 313 done
198 done 314 done
199 315
200 for x in ${CXXFLAGS} 316 for x in ${CXXFLAGS}; do
201 do
202 for y in ${ALLOWED_FLAGS} 317 for y in ${ALLOWED_FLAGS}; do
203 do
204 flag=${x%%=*} 318 flag=${x%%=*}
205 if [ "${flag%%${y}}" = "" ] 319 if [ "${flag%%${y}}" = "" ] ; then
206 then
207 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 320 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
208 break 321 break
209 fi 322 fi
210 done 323 done
211 done 324 done
216 fi 329 fi
217 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 330 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
218 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 331 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
219 fi 332 fi
220 333
221 set +f 334 set +f # re-enable pathname expansion
222
223 [ `use debug` ] \
224 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
225 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
226 335
227 export CFLAGS="${NEW_CFLAGS}" 336 export CFLAGS="${NEW_CFLAGS}"
228 export CXXFLAGS="${NEW_CXXFLAGS}" 337 export CXXFLAGS="${NEW_CXXFLAGS}"
229 return 0 338 return 0
230} 339}
231 340
341test-flag-PROG() {
342 local comp=$1
343 local flags="$2"
344
345 [[ -z ${comp} || -z ${flags} ]] && \
346 return 1
347
348 local PROG=$(tc-get${comp})
349 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
350 > /dev/null 2>&1
351}
352
353# Returns true if C compiler support given flag
354test-flag-CC() { test-flag-PROG "CC" "$1"; }
355
356# Returns true if C++ compiler support given flag
357test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
358
359test-flags-PROG() {
360 local comp=$1
361 local flags
362 local x
363
364 shift
365
366 [[ -z ${comp} ]] && \
367 return 1
368
369 for x in "$@" ; do
370 test-flag-${comp} "${x}" && flags="${flags} ${x}"
371 done
372
373 echo "${flags}"
374
375 # Just bail if we dont have any flags
376 [[ -n ${flags} ]]
377}
378
379# Returns (echo's) the given flags supported by the C compiler
380test-flags-CC() { test-flags-PROG "CC" "$@"; }
381
382# Returns (echo's) the given flags supported by the C++ compiler
383test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
384
385# Short-hand that should hopefully work for both C and C++ compiler, but
386# its really only present due to the append-flags() abomination.
387test-flags() { test-flags-CC "$@"; }
388
389# Depriciated, use test-flags()
232test_flag() { 390test_flag() {
233 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 391 ewarn "test_flag: deprecated, please use test-flags()!" >&2
234 echo "$@" 392
393 test-flags-CC "$@"
394}
395
396test_version_info() {
397 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
235 return 0 398 return 0
236 fi 399 else
237 return 1 400 return 1
401 fi
238} 402}
239 403
240strip-unsupported-flags() { 404strip-unsupported-flags() {
405 local x NEW_CFLAGS NEW_CXXFLAGS
406
241 for x in ${CFLAGS} ; do 407 for x in ${CFLAGS} ; do
242 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 408 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
243 done 409 done
244 for x in ${CXXFLAGS} ; do 410 for x in ${CXXFLAGS} ; do
245 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" 411 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
246 done 412 done
247 413
248 export CFLAGS="${NEW_CFLAGS}" 414 export CFLAGS=${NEW_CFLAGS}
249 export CXXFLAGS="${NEW_CXXFLAGS}" 415 export CXXFLAGS=${NEW_CXXFLAGS}
250} 416}
251 417
252get-flag() { 418get-flag() {
419 local f findflag="$1"
420
253 # this code looks a little flaky but seems to work for 421 # this code looks a little flaky but seems to work for
254 # everything we want ... 422 # everything we want ...
255 # for example, if CFLAGS="-march=i686": 423 # for example, if CFLAGS="-march=i686":
256 # `get-flags -march` == "-march=i686" 424 # `get-flag -march` == "-march=i686"
257 # `get-flags march` == "i686" 425 # `get-flag march` == "i686"
258 local findflag="$1"
259 for f in ${CFLAGS} ${CXXFLAGS} ; do 426 for f in ${CFLAGS} ${CXXFLAGS} ; do
260 if [ "${f/${findflag}}" != "${f}" ] ; then 427 if [ "${f/${findflag}}" != "${f}" ] ; then
261 echo "${f/-${findflag}=}" 428 printf "%s\n" "${f/-${findflag}=}"
262 return 0 429 return 0
263 fi 430 fi
264 done 431 done
265 return 1 432 return 1
266} 433}
267 434
435# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
436has_hardened() {
437 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
438
439 test_version_info Hardened && return 0
440 # The specs file wont exist unless gcc has GCC_SPECS support
441 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
442}
443
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIC is set
446has_pic() {
447 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
448
449 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
450 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
451 gcc-specs-pie
452}
453
454# DEPRECATED - use gcc-specs-pie from toolchain-funcs
455# indicate whether PIE is set
456has_pie() {
457 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
458
459 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
460 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
461 gcc-specs-pie
462}
463
464# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
465# indicate whether code for SSP is being generated for all functions
466has_ssp_all() {
467 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
468
469 # note; this matches only -fstack-protector-all
470 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
472 gcc-specs-ssp-all
473}
474
475# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
476# indicate whether code for SSP is being generated
477has_ssp() {
478 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
479
480 # note; this matches both -fstack-protector and -fstack-protector-all
481 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
482 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
483 gcc-specs-ssp
484}
485
486has_m64() {
487 # this doesnt test if the flag is accepted, it tests if the flag
488 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
489 # please dont replace this function with test_flag in some future
490 # clean-up!
491
492 local temp="$(emktemp)"
493 echo "int main() { return(0); }" > "${temp}".c
494 MY_CC=$(tc-getCC)
495 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
496 local ret=$?
497 rm -f "${temp}".c
498 [[ ${ret} != 1 ]] && return 0
499 return 1
500}
501
502has_m32() {
503 # this doesnt test if the flag is accepted, it tests if the flag
504 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
505 # please dont replace this function with test_flag in some future
506 # clean-up!
507
508 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
509
510 local temp=$(emktemp)
511 echo "int main() { return(0); }" > "${temp}".c
512 MY_CC=$(tc-getCC)
513 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
514 local ret=$?
515 rm -f "${temp}".c
516 [[ ${ret} != 1 ]] && return 0
517 return 1
518}
519
268replace-sparc64-flags() { 520replace-sparc64-flags() {
269 local SPARC64_CPUS="ultrasparc v9" 521 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
270 522
271 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 523 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
272 then
273 for x in ${SPARC64_CPUS} 524 for x in ${SPARC64_CPUS}; do
274 do
275 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 525 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
276 done 526 done
277 else 527 else
278 for x in ${SPARC64_CPUS} 528 for x in ${SPARC64_CPUS}; do
279 do
280 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 529 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
281 done 530 done
282 fi 531 fi
283 532
284 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 533 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
285 then
286 for x in ${SPARC64_CPUS} 534 for x in ${SPARC64_CPUS}; do
287 do
288 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 535 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
289 done 536 done
290 else 537 else
291 for x in ${SPARC64_CPUS} 538 for x in ${SPARC64_CPUS}; do
292 do
293 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 539 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
294 done 540 done
295 fi 541 fi
542
543 export CFLAGS CXXFLAGS
296} 544}
297 545
298append-ldflags() { 546append-ldflags() {
547 [[ -z $* ]] && return 0
299 LDFLAGS="${LDFLAGS} $@" 548 export LDFLAGS="${LDFLAGS} $*"
300 return 0 549 return 0
301} 550}
302 551
552# Remove flags from LDFLAGS - it's up to the ebuild to filter
553# CFLAGS and CXXFLAGS via filter-flags if they need to.
303filter-ldflags() { 554filter-ldflags() {
304 # we do this fancy spacing stuff so as to not filter 555 _filter-var LDFLAGS "$@"
305 # out part of a flag ... we want flag atoms ! :D 556 return 0
306 LDFLAGS=" ${LDFLAGS} " 557}
558
559# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
560# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
561# to gcc where it needs the '-Wl,'.
562raw-ldflags() {
563 local x input="$@"
564 [[ -z ${input} ]] && input=${LDFLAGS}
565 set --
307 for x in "$@" ; do 566 for x in ${input} ; do
308 LDFLAGS="${LDFLAGS// ${x} / }" 567 x=${x#-Wl,}
568 set -- "$@" ${x//,/ }
309 done 569 done
310 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 570 echo "$@"
311 return 0
312} 571}
313 572
314etexec-flags() { 573# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
315 has_version sys-devel/hardened-gcc 574# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
316 if [ $? == 0 ] ; then 575# fixes.
317 if [ "`is-flag -yet_exec`" != "true" ]; then 576#
318 debug-print ">>> appending flags -yet_exec" 577# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
319 append-flags -yet_exec 578gcc2-flags() {
320 append-ldflags -yet_exec 579 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
580 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
581 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
321 fi 582 fi
322 fi
323}
324 583
325fstack-flags() { 584 replace-cpu-flags k6-{2,3} k6
326 has_version sys-devel/hardened-gcc 585 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
327 if [ $? == 0 ] ; then 586
328 if [ "`is-flag -yno_propolice`" != "true" ]; then 587 replace-cpu-flags pentium-mmx i586
329 debug-print ">>> appending flags -yno_propolice" 588 replace-cpu-flags pentium{2,3,4} i686
330 append-flags -yno_propolice 589
331 append-ldflags -yno_propolice 590 replace-cpu-flags ev6{7,8} ev6
332 fi 591
333 fi 592 export CFLAGS CXXFLAGS
334} 593}
594
595# Gets the flags needed for "NOW" binding
596bindnow-flags() {
597 case $($(tc-getLD) -v 2>&1 </dev/null) in
598 *GNU* | *'with BFD'*) # GNU ld
599 echo "-Wl,-z,now" ;;
600 *Apple*) # Darwin ld
601 echo "-bind_at_load" ;;
602 *)
603 # Some linkers just recognize -V instead of -v
604 case $($(tc-getLD) -V 2>&1 </dev/null) in
605 *Solaris*) # Solaris accept almost the same GNU options
606 echo "-Wl,-z,now" ;;
607 esac
608 ;;
609 esac
610}

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