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Revision 1.55 Revision 1.101
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 1.55 2004/06/08 20:49:52 lv 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 5
8INHERITED="$INHERITED $ECLASS" 6# need access to emktemp()
9IUSE="$IUSE debug" 7inherit eutils toolchain-funcs multilib
10 8
11# 9#
12#### filter-flags <flags> #### 10#### filter-flags <flags> ####
13# Remove particular flags from C[XX]FLAGS 11# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags 12# Matches only complete flags
17# Add extra flags to your current C[XX]FLAGS 15# Add extra flags to your current C[XX]FLAGS
18# 16#
19#### replace-flags <orig.flag> <new.flag> ### 17#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one 18# Replace a flag by another one
21# 19#
22#### replace-cpu-flags <new.cpu> <old.cpus> ### 20#### replace-cpu-flags <old.cpus> <new.cpu> ###
23# Replace march/mcpu flags that specify <old.cpus> 21# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu> 22# with flags that specify <new.cpu>
25# 23#
26#### is-flag <flag> #### 24#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS 25# Returns "true" if flag is set in C[XX]FLAGS
51# Add extra flags to your current LDFLAGS 49# Add extra flags to your current LDFLAGS
52# 50#
53#### filter-ldflags <flags> #### 51#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS 52# Remove particular flags from LDFLAGS
55# Matches only complete flags 53# Matches only complete flags
56#
57#### etexec-flags ####
58# hooked function for hardened gcc that appends
59# -fno-pic to {C,CXX,LD}FLAGS
60# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
61# 54#
62#### fstack-flags #### 55#### fstack-flags ####
63# hooked function for hardened gcc that appends 56# hooked function for hardened gcc that appends
64# -fno-stack-protector to {C,CXX,LD}FLAGS 57# -fno-stack-protector to {C,CXX,LD}FLAGS
65# when a package is filtering -fstack-protector, -fstack-protector-all 58# when a package is filtering -fstack-protector, -fstack-protector-all
66# notice: modern automatic specs files will also suppress -fstack-protector-all 59# notice: modern automatic specs files will also suppress -fstack-protector-all
67# when only -fno-stack-protector is given 60# when only -fno-stack-protector is given
68# 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#
69 93
70# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() { 95setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 97 export ALLOWED_FLAGS="-pipe"
74 case "${ARCH}" in 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time"
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
80 esac
81 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"
82 115
83 # 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
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's 117 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0 119 return 0
87} 120}
88 121
89filter-flags() { 122filter-flags() {
123 local x f fset
124 declare -a new_CFLAGS new_CXXFLAGS
125
90 for x in "$@" ; do 126 for x in "$@" ; do
91 case "${x}" in 127 case "${x}" in
92 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 128 -fPIC|-fpic|-fPIE|-fpie|-pie)
129 append-flags `test_flag -fno-pie`;;
93 -fstack-protector|-fstack-protector-all) fstack-flags;; 130 -fstack-protector|-fstack-protector-all)
94 *) ;; 131 fstack-flags;;
95 esac 132 esac
96 done 133 done
97 134
98 # we do this fancy spacing stuff so as to not filter 135 for fset in CFLAGS CXXFLAGS; do
99 # out part of a flag ... we want flag atoms ! :D 136 # Looping over the flags instead of using a global
100 CFLAGS=" ${CFLAGS} " 137 # substitution ensures that we're working with flag atoms.
101 CXXFLAGS=" ${CXXFLAGS} " 138 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags.
140 for f in ${!fset}; do
102 for x in "$@" ; do 141 for x in "$@"; do
103 CFLAGS="${CFLAGS// ${x} / }" 142 # Note this should work with globs like -O*
104 CXXFLAGS="${CXXFLAGS// ${x} / }" 143 [[ ${f} == ${x} ]] && continue 2
144 done
145 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
105 done 146 done
106 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 147 eval export ${fset}=\${new_${fset}\[*]}
107 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 148 done
149
108 return 0 150 return 0
109} 151}
110 152
111filter-lfs-flags() { 153filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
112 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
113} 156}
114 157
115append-lfs-flags() { 158append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
116 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
117} 161}
118 162
119append-flags() { 163append-flags() {
164 [[ -z $* ]] && return 0
120 export CFLAGS="${CFLAGS} $@" 165 export CFLAGS="${CFLAGS} $*"
121 export CXXFLAGS="${CXXFLAGS} $@" 166 export CXXFLAGS="${CXXFLAGS} $*"
122 [ "`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
123 return 0 169 return 0
124} 170}
125 171
126replace-flags() { 172replace-flags() {
127 # we do this fancy spacing stuff so as to not filter 173 [[ $# != 2 ]] \
128 # out part of a flag ... we want flag atoms ! :D 174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
129 CFLAGS=" ${CFLAGS} " 175 && die "replace-flags takes 2 arguments, not $#"
130 CXXFLAGS=" ${CXXFLAGS} " 176
131 CFLAGS="${CFLAGS// ${1} / ${2} }" 177 local f fset
132 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 178 declare -a new_CFLAGS new_CXXFLAGS
133 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 179
134 CXXFLAGS="${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
135 return 0 193 return 0
136} 194}
137 195
138replace-cpu-flags() { 196replace-cpu-flags() {
139 local newcpu="$1" ; shift 197 local newcpu="$#" ; newcpu="${!newcpu}"
140 local oldcpu="" 198 while [ $# -gt 1 ] ; do
141 for oldcpu in "$@" ; do 199 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags
142 replace-flags -march=${oldcpu} -march=${newcpu} 201 replace-flags "-march=${1}" "-march=${newcpu}"
143 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
144 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 203 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift
145 done 205 done
146 return 0 206 return 0
147} 207}
148 208
149is-flag() { 209is-flag() {
210 local x
211
150 for x in ${CFLAGS} ${CXXFLAGS} ; do 212 for x in ${CFLAGS} ${CXXFLAGS} ; do
213 # Note this should work with globs like -mcpu=ultrasparc*
151 if [ "${x}" == "$1" ] ; then 214 if [[ ${x} == ${1} ]]; then
152 echo true 215 echo true
153 return 0 216 return 0
154 fi 217 fi
155 done 218 done
156 return 1 219 return 1
157} 220}
158 221
159filter-mfpmath() { 222filter-mfpmath() {
223 local orig_mfpmath new_math prune_math
224
160 # save the original -mfpmath flag 225 # save the original -mfpmath flag
161 local orig_mfpmath="`get-flag -mfpmath`" 226 orig_mfpmath="`get-flag -mfpmath`"
162 # get the value of the current -mfpmath flag 227 # get the value of the current -mfpmath flag
163 local new_math=" `get-flag mfpmath | tr , ' '` " 228 new_math=" `get-flag mfpmath | tr , ' '` "
164 # figure out which math values are to be removed 229 # figure out which math values are to be removed
165 local prune_math="" 230 prune_math=""
166 for prune_math in "$@" ; do 231 for prune_math in "$@" ; do
167 new_math="${new_math/ ${prune_math} / }" 232 new_math="${new_math/ ${prune_math} / }"
168 done 233 done
169 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
170 235
179 fi 244 fi
180 return 0 245 return 0
181} 246}
182 247
183strip-flags() { 248strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS
250
184 setup-allowed-flags 251 setup-allowed-flags
185 252
186 local NEW_CFLAGS="" 253 local NEW_CFLAGS=""
187 local NEW_CXXFLAGS="" 254 local NEW_CXXFLAGS=""
188 255
189 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 256 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
190 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
191 use debug && einfo "Enabling the use of some unstable flags"
192 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
193 fi 259 fi
194 260
195 set -f 261 set -f # disable pathname expansion
196 262
197 for x in ${CFLAGS} 263 for x in ${CFLAGS}; do
198 do
199 for y in ${ALLOWED_FLAGS} 264 for y in ${ALLOWED_FLAGS}; do
200 do
201 flag=${x%%=*} 265 flag=${x%%=*}
202 if [ "${flag%%${y}}" = "" ] 266 if [ "${flag%%${y}}" = "" ] ; then
203 then
204 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 267 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
205 break 268 break
206 fi 269 fi
207 done 270 done
208 done 271 done
209 272
210 for x in ${CXXFLAGS} 273 for x in ${CXXFLAGS}; do
211 do
212 for y in ${ALLOWED_FLAGS} 274 for y in ${ALLOWED_FLAGS}; do
213 do
214 flag=${x%%=*} 275 flag=${x%%=*}
215 if [ "${flag%%${y}}" = "" ] 276 if [ "${flag%%${y}}" = "" ] ; then
216 then
217 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 277 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
218 break 278 break
219 fi 279 fi
220 done 280 done
221 done 281 done
226 fi 286 fi
227 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
228 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
229 fi 289 fi
230 290
231 set +f 291 set +f # re-enable pathname expansion
232
233 use debug \
234 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
235 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
236 292
237 export CFLAGS="${NEW_CFLAGS}" 293 export CFLAGS="${NEW_CFLAGS}"
238 export CXXFLAGS="${NEW_CXXFLAGS}" 294 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0 295 return 0
240} 296}
241 297
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()
242test_flag() { 347test_flag() {
243 if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then 348 addwrite "/dev/stderr"
244 echo "$@" 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
245 return 0 356 return 0
246 fi 357 else
247 return 1 358 return 1
359 fi
248} 360}
249 361
250strip-unsupported-flags() { 362strip-unsupported-flags() {
363 local x NEW_CFLAGS NEW_CXXFLAGS
364
251 for x in ${CFLAGS} ; do 365 for x in ${CFLAGS} ; do
252 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 366 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
253 done 367 done
254 for x in ${CXXFLAGS} ; do 368 for x in ${CXXFLAGS} ; do
255 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" 369 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
256 done 370 done
257 371
258 export CFLAGS="${NEW_CFLAGS}" 372 export CFLAGS=${NEW_CFLAGS}
259 export CXXFLAGS="${NEW_CXXFLAGS}" 373 export CXXFLAGS=${NEW_CXXFLAGS}
260} 374}
261 375
262get-flag() { 376get-flag() {
377 local f findflag="$1"
378
263 # this code looks a little flaky but seems to work for 379 # this code looks a little flaky but seems to work for
264 # everything we want ... 380 # everything we want ...
265 # for example, if CFLAGS="-march=i686": 381 # for example, if CFLAGS="-march=i686":
266 # `get-flags -march` == "-march=i686" 382 # `get-flag -march` == "-march=i686"
267 # `get-flags march` == "i686" 383 # `get-flag march` == "i686"
268 local findflag="$1"
269 for f in ${CFLAGS} ${CXXFLAGS} ; do 384 for f in ${CFLAGS} ${CXXFLAGS} ; do
270 if [ "${f/${findflag}}" != "${f}" ] ; then 385 if [ "${f/${findflag}}" != "${f}" ] ; then
271 echo "${f/-${findflag}=}" 386 printf "%s\n" "${f/-${findflag}=}"
272 return 0 387 return 0
273 fi 388 fi
274 done 389 done
275 return 1 390 return 1
276} 391}
277 392
393# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
278has_hardened() { 394has_hardened() {
279 local cc=${CC:-gcc} 395 addwrite "/dev/stderr"
280 [[ $(${cc%% *} --version 2>&1) == *Hardened* ]] 396 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \
281 return $? 397 >/dev/stderr
282}
283 398
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} != ${GCC_SPECS/hardened/} ]]
402}
403
404# DEPRECATED - use gcc-specs-pie from toolchain-funcs
405# indicate whether PIC is set
284has_pic() { 406has_pic() {
285 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 407 addwrite "/dev/stderr"
286 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 408 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr
287 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 409
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 [[ ${ret} != 1 ]] && return 0
288 return 1 465 return 1
289} 466}
290 467
291has_pie() { 468has_m32() {
292 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 469 # this doesnt test if the flag is accepted, it tests if the flag
293 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 470 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
294 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 471 # 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 [[ ${ret} != 1 ]] && return 0
295 return 1 483 return 1
296} 484}
297
298has_ssp() {
299 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
300 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
301 return 1
302}
303 485
304replace-sparc64-flags() { 486replace-sparc64-flags() {
305 local SPARC64_CPUS="ultrasparc v9" 487 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
306 488
307 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 489 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
308 then
309 for x in ${SPARC64_CPUS} 490 for x in ${SPARC64_CPUS}; do
310 do
311 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 491 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
312 done 492 done
313 else 493 else
314 for x in ${SPARC64_CPUS} 494 for x in ${SPARC64_CPUS}; do
315 do
316 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 495 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
317 done 496 done
318 fi 497 fi
319 498
320 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 499 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
321 then
322 for x in ${SPARC64_CPUS} 500 for x in ${SPARC64_CPUS}; do
323 do
324 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 501 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
325 done 502 done
326 else 503 else
327 for x in ${SPARC64_CPUS} 504 for x in ${SPARC64_CPUS}; do
328 do
329 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 505 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
330 done 506 done
331 fi 507 fi
508
509 export CFLAGS CXXFLAGS
332} 510}
333 511
334append-ldflags() { 512append-ldflags() {
335 LDFLAGS="${LDFLAGS} $@" 513 export LDFLAGS="${LDFLAGS} $*"
336 return 0 514 return 0
337} 515}
338 516
339filter-ldflags() { 517filter-ldflags() {
518 local x
519
340 # we do this fancy spacing stuff so as to not filter 520 # we do this fancy spacing stuff so as to not filter
341 # out part of a flag ... we want flag atoms ! :D 521 # out part of a flag ... we want flag atoms ! :D
342 LDFLAGS=" ${LDFLAGS} " 522 LDFLAGS=" ${LDFLAGS} "
343 for x in "$@" ; do 523 for x in "$@" ; do
344 LDFLAGS="${LDFLAGS// ${x} / }" 524 LDFLAGS=${LDFLAGS// ${x} / }
345 done 525 done
526 [[ -z ${LDFLAGS// } ]] \
527 && LDFLAGS="" \
346 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 528 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
529 export LDFLAGS
347 return 0 530 return 0
348}
349
350etexec-flags() {
351 # if your not using a hardened compiler you wont need this
352 # PIC/no-pic kludge in the first place.
353 has_hardened || return
354
355 has_pie || has_pic
356 if [ $? == 0 ] ; then
357 [ -z "`is-flag -fno-pic`" ] &&
358 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
359
360 [ -z "`is-flag -nopie`" ] &&
361 export CFLAGS="${CFLAGS} `test_flag -nopie`"
362 fi
363} 531}
364 532
365fstack-flags() { 533fstack-flags() {
366 has_ssp 534 if gcc-specs-ssp; then
367 if [ $? == 0 ] ; then
368 [ -z "`is-flag -fno-stack-protector`" ] && 535 [ -z "`is-flag -fno-stack-protector`" ] &&
369 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 536 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
370 fi 537 fi
538 return 0
371} 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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