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Revision 1.44 Revision 1.108
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2006 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 1.44 2004/04/08 21:53:15 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.108 2006/06/15 14:45:59 vapier Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Maintainer: base-system@gentoo.org
6 6
7ECLASS=flag-o-matic 7# need access to emktemp()
8INHERITED="$INHERITED $ECLASS" 8inherit eutils toolchain-funcs multilib
9 9
10# 10#
11#### filter-flags <flags> #### 11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS 12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags 13# Matches only complete flags
16# Add extra flags to your current C[XX]FLAGS 16# Add extra flags to your current C[XX]FLAGS
17# 17#
18#### replace-flags <orig.flag> <new.flag> ### 18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one 19# Replace a flag by another one
20# 20#
21#### replace-cpu-flags <new.cpu> <old.cpus> ### 21#### replace-cpu-flags <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus> 22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu> 23# with flags that specify <new.cpu>
24# 24#
25#### is-flag <flag> #### 25#### is-flag[q] <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag 27# Matches only complete a flag
28# q version sets return code but doesn't echo
29#
30#### is-ldflag[q] <flag> ####
31# Returns "true" if flag is set in LDFLAGS
32# Matches only complete a flag
33# q version sets return code but doesn't echo
28# 34#
29#### strip-flags #### 35#### strip-flags ####
30# Strip C[XX]FLAGS of everything except known 36# Strip C[XX]FLAGS of everything except known
31# good options. 37# good options.
32# 38#
51# 57#
52#### filter-ldflags <flags> #### 58#### filter-ldflags <flags> ####
53# Remove particular flags from LDFLAGS 59# Remove particular flags from LDFLAGS
54# Matches only complete flags 60# Matches only complete flags
55# 61#
56#### etexec-flags #### 62#### bindnow-flags ####
57# hooked function for hardened-gcc that appends 63# 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# 64#
61#### fstack-flags #### 65################ DEPRECATED functions ################
62# hooked function for hardened-gcc that appends 66# The following are still present to avoid breaking existing
63# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed 67# code more than necessary; however they are deprecated. Please
64# and a package is filtering -fstack-protector, -fstack-protector-all 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
65# 92#
66 93
67# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
68setup-allowed-flags() { 95setup-allowed-flags() {
69 if [ -z "${ALLOWED_FLAGS}" ] ; then 96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
70 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 97 export ALLOWED_FLAGS="-pipe"
71 case "${ARCH}" in 98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
72 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
73 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking"
74 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
75 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3"
76 esac 103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
77 fi 104 fi
105 # allow a bunch of flags that negate features / control ABI
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
108 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
109 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
110 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
111 -mieee -mieee-with-inexact \
112 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
113 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias"
78 116
79 # C[XX]FLAGS that we are think is ok, but needs testing 117 # C[XX]FLAGS that we are think is ok, but needs testing
80 # NOTE: currently -Os have issues with gcc3 and K6* arch's 118 # NOTE: currently -Os have issues with gcc3 and K6* arch's
81 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 119 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
82 return 0 120 return 0
121}
122
123# inverted filters for hardened compiler. This is trying to unpick
124# the hardened compiler defaults.
125_filter-hardened() {
126 local f
127 for f in "$@" ; do
128 case "${f}" in
129 # Ideally we should only concern ourselves with PIE flags,
130 # not -fPIC or -fpic, but too many places filter -fPIC without
131 # thinking about -fPIE.
132 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
133 gcc-specs-pie || continue
134 is-flagq -nopie || append-flags -nopie;;
135 -fstack-protector)
136 gcc-specs-ssp || continue
137 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
138 -fstack-protector-all)
139 gcc-specs-ssp-to-all || continue
140 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
141 esac
142 done
143}
144
145# Remove occurrences of strings from variable given in $1
146# Strings removed are matched as globs, so for example
147# '-O*' would remove -O1, -O2 etc.
148_filter-var() {
149 local f x VAR VAL
150 declare -a new
151
152 VAR=$1
153 shift
154 eval VAL=\${${VAR}}
155 for f in ${VAL}; do
156 for x in "$@"; do
157 # Note this should work with globs like -O*
158 [[ ${f} == ${x} ]] && continue 2
159 done
160 eval new\[\${\#new\[@]}]=\${f}
161 done
162 eval export ${VAR}=\${new\[*]}
83} 163}
84 164
85filter-flags() { 165filter-flags() {
86 for x in "$@" ; do 166 _filter-hardened "$@"
87 case "${x}" in 167 _filter-var CFLAGS "$@"
88 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 168 _filter-var CXXFLAGS "$@"
89 -fstack-protector|-fstack-protector-all) fstack-flags;;
90 *) ;;
91 esac
92 done
93
94 # we do this fancy spacing stuff so as to not filter
95 # out part of a flag ... we want flag atoms ! :D
96 CFLAGS=" ${CFLAGS} "
97 CXXFLAGS=" ${CXXFLAGS} "
98 for x in "$@" ; do
99 CFLAGS="${CFLAGS// ${x} / }"
100 CXXFLAGS="${CXXFLAGS// ${x} / }"
101 done
102 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
103 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
104 return 0 169 return 0
105} 170}
106 171
107filter-lfs-flags() { 172filter-lfs-flags() {
173 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
108 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 174 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
109} 175}
110 176
177append-lfs-flags() {
178 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
179 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
180}
181
111append-flags() { 182append-flags() {
183 [[ -z $* ]] && return 0
112 export CFLAGS="${CFLAGS} $@" 184 export CFLAGS="${CFLAGS} $*"
113 export CXXFLAGS="${CXXFLAGS} $@" 185 export CXXFLAGS="${CXXFLAGS} $*"
114 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
115 return 0 186 return 0
116} 187}
117 188
118replace-flags() { 189replace-flags() {
119 # we do this fancy spacing stuff so as to not filter 190 [[ $# != 2 ]] \
120 # out part of a flag ... we want flag atoms ! :D 191 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
121 CFLAGS=" ${CFLAGS} " 192 && die "replace-flags takes 2 arguments, not $#"
122 CXXFLAGS=" ${CXXFLAGS} " 193
123 CFLAGS="${CFLAGS// ${1} / ${2} }" 194 local f fset
124 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 195 declare -a new_CFLAGS new_CXXFLAGS
125 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 196
126 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 197 for fset in CFLAGS CXXFLAGS; do
198 # Looping over the flags instead of using a global
199 # substitution ensures that we're working with flag atoms.
200 # Otherwise globs like -O* have the potential to wipe out the
201 # list of flags.
202 for f in ${!fset}; do
203 # Note this should work with globs like -O*
204 [[ ${f} == ${1} ]] && f=${2}
205 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
206 done
207 eval export ${fset}=\${new_${fset}\[*]}
208 done
209
127 return 0 210 return 0
128} 211}
129 212
130replace-cpu-flags() { 213replace-cpu-flags() {
131 local newcpu="$1" ; shift 214 local newcpu="$#" ; newcpu="${!newcpu}"
132 local oldcpu="" 215 while [ $# -gt 1 ] ; do
133 for oldcpu in "$@" ; do 216 # quote to make sure that no globbing is done (particularly on
217 # ${oldcpu} prior to calling replace-flags
134 replace-flags -march=${oldcpu} -march=${newcpu} 218 replace-flags "-march=${1}" "-march=${newcpu}"
135 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 219 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
136 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 220 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
221 shift
137 done 222 done
138 return 0 223 return 0
139} 224}
140 225
141is-flag() { 226is-flagq() {
227 local x
228
142 for x in ${CFLAGS} ${CXXFLAGS} ; do 229 for x in ${CFLAGS} ${CXXFLAGS} ; do
230 # Note this should work with globs like -mcpu=ultrasparc*
143 if [ "${x}" == "$1" ] ; then 231 if [[ ${x} == ${1} ]]; then
144 echo true
145 return 0 232 return 0
146 fi 233 fi
147 done 234 done
148 return 1 235 return 1
149} 236}
150 237
238is-flag() {
239 if is-flagq ${1}; then
240 echo true
241 return 0
242 fi
243 return 1
244}
245
246is-ldflagq() {
247 local x
248
249 for x in ${LDFLAGS} ; do
250 # Note this should work with globs like -mcpu=ultrasparc*
251 if [[ ${x} == ${1} ]]; then
252 return 0
253 fi
254 done
255 return 1
256}
257
258is-ldflag() {
259 if is-ldflagq ${1}; then
260 echo true
261 return 0
262 fi
263 return 1
264}
265
151filter-mfpmath() { 266filter-mfpmath() {
267 local orig_mfpmath new_math prune_math
268
152 # save the original -mfpmath flag 269 # save the original -mfpmath flag
153 local orig_mfpmath="`get-flag -mfpmath`" 270 orig_mfpmath="`get-flag -mfpmath`"
154 # get the value of the current -mfpmath flag 271 # get the value of the current -mfpmath flag
155 local new_math=" `get-flag mfpmath | tr , ' '` " 272 new_math=" `get-flag mfpmath | tr , ' '` "
156 # figure out which math values are to be removed 273 # figure out which math values are to be removed
157 local prune_math="" 274 prune_math=""
158 for prune_math in "$@" ; do 275 for prune_math in "$@" ; do
159 new_math="${new_math/ ${prune_math} / }" 276 new_math="${new_math/ ${prune_math} / }"
160 done 277 done
161 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 278 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
162 279
171 fi 288 fi
172 return 0 289 return 0
173} 290}
174 291
175strip-flags() { 292strip-flags() {
293 local x y flag NEW_CFLAGS NEW_CXXFLAGS
294
176 setup-allowed-flags 295 setup-allowed-flags
177 296
178 local NEW_CFLAGS="" 297 local NEW_CFLAGS=""
179 local NEW_CXXFLAGS="" 298 local NEW_CXXFLAGS=""
180 299
181 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 300 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
182 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 301 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
183 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
184 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 302 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
185 fi 303 fi
186 304
187 set -f 305 set -f # disable pathname expansion
188 306
189 for x in ${CFLAGS} 307 for x in ${CFLAGS}; do
190 do
191 for y in ${ALLOWED_FLAGS} 308 for y in ${ALLOWED_FLAGS}; do
192 do
193 flag=${x%%=*} 309 flag=${x%%=*}
194 if [ "${flag%%${y}}" = "" ] 310 if [ "${flag%%${y}}" = "" ] ; then
195 then
196 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 311 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
197 break 312 break
198 fi 313 fi
199 done 314 done
200 done 315 done
201 316
202 for x in ${CXXFLAGS} 317 for x in ${CXXFLAGS}; do
203 do
204 for y in ${ALLOWED_FLAGS} 318 for y in ${ALLOWED_FLAGS}; do
205 do
206 flag=${x%%=*} 319 flag=${x%%=*}
207 if [ "${flag%%${y}}" = "" ] 320 if [ "${flag%%${y}}" = "" ] ; then
208 then
209 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 321 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
210 break 322 break
211 fi 323 fi
212 done 324 done
213 done 325 done
218 fi 330 fi
219 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 331 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
220 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 332 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
221 fi 333 fi
222 334
223 set +f 335 set +f # re-enable pathname expansion
224
225 [ `use debug` ] \
226 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
227 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
228 336
229 export CFLAGS="${NEW_CFLAGS}" 337 export CFLAGS="${NEW_CFLAGS}"
230 export CXXFLAGS="${NEW_CXXFLAGS}" 338 export CXXFLAGS="${NEW_CXXFLAGS}"
231 return 0 339 return 0
232} 340}
233 341
342test-flag-PROG() {
343 local comp=$1
344 local flags="$2"
345
346 [[ -z ${comp} || -z ${flags} ]] && \
347 return 1
348
349 local PROG=$(tc-get${comp})
350 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
351 > /dev/null 2>&1
352}
353
354# Returns true if C compiler support given flag
355test-flag-CC() { test-flag-PROG "CC" "$1"; }
356
357# Returns true if C++ compiler support given flag
358test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
359
360test-flags-PROG() {
361 local comp=$1
362 local flags
363 local x
364
365 shift
366
367 [[ -z ${comp} ]] && \
368 return 1
369
370 for x in "$@" ; do
371 test-flag-${comp} "${x}" && flags="${flags} ${x}"
372 done
373
374 echo "${flags}"
375
376 # Just bail if we dont have any flags
377 [[ -n ${flags} ]]
378}
379
380# Returns (echo's) the given flags supported by the C compiler
381test-flags-CC() { test-flags-PROG "CC" "$@"; }
382
383# Returns (echo's) the given flags supported by the C++ compiler
384test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
385
386# Short-hand that should hopefully work for both C and C++ compiler, but
387# its really only present due to the append-flags() abomination.
388test-flags() { test-flags-CC "$@"; }
389
390# Depriciated, use test-flags()
234test_flag() { 391test_flag() {
235 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 392 ewarn "test_flag: deprecated, please use test-flags()!" >&2
236 echo "$@" 393
394 test-flags-CC "$@"
395}
396
397test_version_info() {
398 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
237 return 0 399 return 0
238 fi 400 else
239 return 1 401 return 1
402 fi
240} 403}
241 404
242strip-unsupported-flags() { 405strip-unsupported-flags() {
406 local x NEW_CFLAGS NEW_CXXFLAGS
407
243 for x in ${CFLAGS} ; do 408 for x in ${CFLAGS} ; do
244 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 409 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})"
245 done 410 done
246 for x in ${CXXFLAGS} ; do 411 for x in ${CXXFLAGS} ; do
247 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`" 412 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
248 done 413 done
249 414
250 export CFLAGS="${NEW_CFLAGS}" 415 export CFLAGS=${NEW_CFLAGS}
251 export CXXFLAGS="${NEW_CXXFLAGS}" 416 export CXXFLAGS=${NEW_CXXFLAGS}
252} 417}
253 418
254get-flag() { 419get-flag() {
420 local f findflag="$1"
421
255 # this code looks a little flaky but seems to work for 422 # this code looks a little flaky but seems to work for
256 # everything we want ... 423 # everything we want ...
257 # for example, if CFLAGS="-march=i686": 424 # for example, if CFLAGS="-march=i686":
258 # `get-flags -march` == "-march=i686" 425 # `get-flag -march` == "-march=i686"
259 # `get-flags march` == "i686" 426 # `get-flag march` == "i686"
260 local findflag="$1"
261 for f in ${CFLAGS} ${CXXFLAGS} ; do 427 for f in ${CFLAGS} ${CXXFLAGS} ; do
262 if [ "${f/${findflag}}" != "${f}" ] ; then 428 if [ "${f/${findflag}}" != "${f}" ] ; then
263 echo "${f/-${findflag}=}" 429 printf "%s\n" "${f/-${findflag}=}"
264 return 0 430 return 0
265 fi 431 fi
266 done 432 done
267 return 1 433 return 1
268} 434}
269 435
436# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
437has_hardened() {
438 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
439
440 test_version_info Hardened && return 0
441 # The specs file wont exist unless gcc has GCC_SPECS support
442 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
443}
444
445# DEPRECATED - use gcc-specs-pie from toolchain-funcs
446# indicate whether PIC is set
270has_pic() { 447has_pic() {
271 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 448 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
272 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 449
273 [ has_version sys-devel/hardened-gcc ] && return 0 450 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
274 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 451 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
452 gcc-specs-pie
453}
454
455# DEPRECATED - use gcc-specs-pie from toolchain-funcs
456# indicate whether PIE is set
457has_pie() {
458 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
459
460 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
461 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
462 gcc-specs-pie
463}
464
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466# indicate whether code for SSP is being generated for all functions
467has_ssp_all() {
468 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
469
470 # note; this matches only -fstack-protector-all
471 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
473 gcc-specs-ssp-all
474}
475
476# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
477# indicate whether code for SSP is being generated
478has_ssp() {
479 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
480
481 # note; this matches both -fstack-protector and -fstack-protector-all
482 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
483 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
484 gcc-specs-ssp
485}
486
487has_m64() {
488 # this doesnt test if the flag is accepted, it tests if the flag
489 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
490 # please dont replace this function with test_flag in some future
491 # clean-up!
492
493 local temp="$(emktemp)"
494 echo "int main() { return(0); }" > "${temp}".c
495 MY_CC=$(tc-getCC)
496 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
497 local ret=$?
498 rm -f "${temp}".c
499 [[ ${ret} != 1 ]] && return 0
275 return 1 500 return 1
276} 501}
277 502
278has_pie() { 503has_m32() {
279 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 504 # this doesnt test if the flag is accepted, it tests if the flag
280 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 505 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
281 [ has_version sys-devel/hardened-gcc ] && return 0 506 # please dont replace this function with test_flag in some future
282 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 507 # clean-up!
508
509 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
510
511 local temp=$(emktemp)
512 echo "int main() { return(0); }" > "${temp}".c
513 MY_CC=$(tc-getCC)
514 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
515 local ret=$?
516 rm -f "${temp}".c
517 [[ ${ret} != 1 ]] && return 0
283 return 1 518 return 1
284} 519}
285
286has_ssp() {
287 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
288 [ has_version sys-devel/hardened-gcc ] && return 0
289 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
290 return 1
291}
292 520
293replace-sparc64-flags() { 521replace-sparc64-flags() {
294 local SPARC64_CPUS="ultrasparc v9" 522 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
295 523
296 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 524 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
297 then
298 for x in ${SPARC64_CPUS} 525 for x in ${SPARC64_CPUS}; do
299 do
300 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 526 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
301 done 527 done
302 else 528 else
303 for x in ${SPARC64_CPUS} 529 for x in ${SPARC64_CPUS}; do
304 do
305 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 530 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
306 done 531 done
307 fi 532 fi
308 533
309 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 534 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
310 then
311 for x in ${SPARC64_CPUS} 535 for x in ${SPARC64_CPUS}; do
312 do
313 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 536 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
314 done 537 done
315 else 538 else
316 for x in ${SPARC64_CPUS} 539 for x in ${SPARC64_CPUS}; do
317 do
318 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 540 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
319 done 541 done
320 fi 542 fi
543
544 export CFLAGS CXXFLAGS
321} 545}
322 546
323append-ldflags() { 547append-ldflags() {
548 [[ -z $* ]] && return 0
324 LDFLAGS="${LDFLAGS} $@" 549 export LDFLAGS="${LDFLAGS} $*"
325 return 0 550 return 0
326} 551}
327 552
553# Remove flags from LDFLAGS - it's up to the ebuild to filter
554# CFLAGS and CXXFLAGS via filter-flags if they need to.
328filter-ldflags() { 555filter-ldflags() {
329 # we do this fancy spacing stuff so as to not filter 556 _filter-var LDFLAGS "$@"
330 # out part of a flag ... we want flag atoms ! :D 557 return 0
331 LDFLAGS=" ${LDFLAGS} " 558}
559
560# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
561# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
562# to gcc where it needs the '-Wl,'.
563raw-ldflags() {
564 local x input="$@"
565 [[ -z ${input} ]] && input=${LDFLAGS}
566 set --
332 for x in "$@" ; do 567 for x in ${input} ; do
333 LDFLAGS="${LDFLAGS// ${x} / }" 568 x=${x#-Wl,}
569 set -- "$@" ${x//,/ }
334 done 570 done
335 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 571 echo "$@"
336 return 0
337} 572}
338 573
339etexec-flags() { 574# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
340 has_pie || has_pic 575# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
341 if [ $? == 0 ] ; then 576# fixes.
342 # strip -fPIC regardless if you've gotten this far 577#
343 strip-flags -fPIC -fpic -fPIE -fpie -pie 578# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
344 if [ "`is-flag -yet_exec`" != "true" ]; then 579gcc2-flags() {
345 # If our compile support -yet_exec, append it now 580 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
346 [ -z "`gcc -yet_exec -S -o /dev/null -xc /dev/null 2>&1`" ] \ 581 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
347 && ( debug-print ">>> appending flags -yet_exec" ; \ 582 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
348 append-flags -yet_exec ; append-ldflags -yet_exec )
349 fi 583 fi
350 fi
351}
352 584
353fstack-flags() { 585 replace-cpu-flags k6-{2,3} k6
354 has_ssp 586 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
355 if [ $? == 0 ] ; then 587
356 # strip -fstack-protector regardless if you've gotten this far 588 replace-cpu-flags pentium-mmx i586
357 strip-flags -fstack-protector -fstack-protector-all 589 replace-cpu-flags pentium{2,3,4} i686
358 if [ "`is-flag -yno_propolice`" != "true" ]; then 590
359 # If our compile support -yno_propolice, append it now 591 replace-cpu-flags ev6{7,8} ev6
360 [ -z "`gcc -yno_propolice -S -o /dev/null -xc /dev/null 2>&1`" ] \ 592
361 && ( debug-print ">>> appending flags -yno_propolice" ; \ 593 export CFLAGS CXXFLAGS
362 append-flags -yno_propolice ; append-ldflags -yno_propolice )
363 fi
364 fi
365} 594}
595
596# Gets the flags needed for "NOW" binding
597bindnow-flags() {
598 case $($(tc-getLD) -v 2>&1 </dev/null) in
599 *GNU* | *'with BFD'*) # GNU ld
600 echo "-Wl,-z,now" ;;
601 *Apple*) # Darwin ld
602 echo "-bind_at_load" ;;
603 *)
604 # Some linkers just recognize -V instead of -v
605 case $($(tc-getLD) -V 2>&1 </dev/null) in
606 *Solaris*) # Solaris accept almost the same GNU options
607 echo "-Wl,-z,now" ;;
608 esac
609 ;;
610 esac
611}

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