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Revision 1.28 Revision 1.119
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2007 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 1.28 2003/10/26 00:40:52 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.119 2007/05/12 11:45:51 vapier Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Maintainer: toolchain@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 <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
21#### is-flag <flag> #### 25#### is-flag[q] <flag> ####
22# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
23# 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
24# 34#
25#### strip-flags #### 35#### strip-flags ####
26# Strip C[XX]FLAGS of everything except known 36# Strip C[XX]FLAGS of everything except known
27# good options. 37# good options.
38#
39#### strip-unsupported-flags ####
40# Strip C[XX]FLAGS of any flags not supported by
41# installed version of gcc
28# 42#
29#### get-flag <flag> #### 43#### get-flag <flag> ####
30# Find and echo the value for a particular flag 44# Find and echo the value for a particular flag
31# 45#
32#### replace-sparc64-flags #### 46#### replace-sparc64-flags ####
… …
39# will leave the user with -mfpmath=386 53# will leave the user with -mfpmath=386
40# 54#
41#### append-ldflags #### 55#### append-ldflags ####
42# Add extra flags to your current LDFLAGS 56# Add extra flags to your current LDFLAGS
43# 57#
44#### etexec-flags #### 58#### filter-ldflags <flags> ####
45# hooked function for hardened-gcc that appends 59# Remove particular flags from LDFLAGS
46# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed 60# Matches only complete flags
47# and a package is filtering -fPIC
48# 61#
49#### fstack-flags #### 62#### bindnow-flags ####
50# hooked function for hardened-gcc that appends 63# Returns the flags to enable "now" binding in the current selected linker.
51# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed 64#
52# and a package is filtering -fstack-protector 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
53# 92#
54 93
55# C[XX]FLAGS that we allow in strip-flags 94# C[XX]FLAGS that we allow in strip-flags
56ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 95# Note: shell globs and character lists are allowed
57case "${ARCH}" in 96setup-allowed-flags() {
58 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 97 if [[ -z ${ALLOWED_FLAGS} ]] ; then
59 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 98 export ALLOWED_FLAGS="-pipe"
60 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
61esac 100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
105 fi
106 # allow a bunch of flags that negate features / control ABI
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
108 -fno-strict-aliasing -fno-bounds-checking"
109 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
110 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
111 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
112 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
113 -mieee -mieee-with-inexact -mschedule \
114 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
115 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
116 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
117 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
118 -msecure-plt -D*"
62 119
63# C[XX]FLAGS that we are think is ok, but needs testing 120 # C[XX]FLAGS that we are think is ok, but needs testing
64# NOTE: currently -Os have issues with gcc3 and K6* arch's 121 # NOTE: currently -Os have issues with gcc3 and K6* arch's
65UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 122 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
123 return 0
124}
125
126# inverted filters for hardened compiler. This is trying to unpick
127# the hardened compiler defaults.
128_filter-hardened() {
129 local f
130 for f in "$@" ; do
131 case "${f}" in
132 # Ideally we should only concern ourselves with PIE flags,
133 # not -fPIC or -fpic, but too many places filter -fPIC without
134 # thinking about -fPIE.
135 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
136 gcc-specs-pie || continue
137 is-flagq -nopie || append-flags -nopie;;
138 -fstack-protector)
139 gcc-specs-ssp || continue
140 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
141 -fstack-protector-all)
142 gcc-specs-ssp-to-all || continue
143 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
144 esac
145 done
146}
147
148# Remove occurrences of strings from variable given in $1
149# Strings removed are matched as globs, so for example
150# '-O*' would remove -O1, -O2 etc.
151_filter-var() {
152 local f x VAR VAL
153 declare -a new
154
155 VAR=$1
156 shift
157 eval VAL=\${${VAR}}
158 for f in ${VAL}; do
159 for x in "$@"; do
160 # Note this should work with globs like -O*
161 [[ ${f} == ${x} ]] && continue 2
162 done
163 eval new\[\${\#new\[@]}]=\${f}
164 done
165 eval export ${VAR}=\${new\[*]}
166}
167
168filter-flags() {
169 _filter-hardened "$@"
170 _filter-var CFLAGS "$@"
171 _filter-var CPPFLAGS "$@"
172 _filter-var CXXFLAGS "$@"
173 return 0
174}
175
176filter-lfs-flags() {
177 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
178 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
179}
180
181append-cppflags() {
182 [[ -z $* ]] && return 0
183 export CPPFLAGS="${CPPFLAGS} $*"
184 return 0
185}
186
187append-lfs-flags() {
188 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
189 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
190}
191
192append-flags() {
193 [[ -z $* ]] && return 0
194 export CFLAGS="${CFLAGS} $*"
195 export CXXFLAGS="${CXXFLAGS} $*"
196 return 0
197}
198
199replace-flags() {
200 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
202 && die "replace-flags takes 2 arguments, not $#"
203
204 local f fset
205 declare -a new_CFLAGS new_CXXFLAGS
206
207 for fset in CFLAGS CXXFLAGS; do
208 # Looping over the flags instead of using a global
209 # substitution ensures that we're working with flag atoms.
210 # Otherwise globs like -O* have the potential to wipe out the
211 # list of flags.
212 for f in ${!fset}; do
213 # Note this should work with globs like -O*
214 [[ ${f} == ${1} ]] && f=${2}
215 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
216 done
217 eval export ${fset}=\${new_${fset}\[*]}
218 done
219
220 return 0
221}
222
223replace-cpu-flags() {
224 local newcpu="$#" ; newcpu="${!newcpu}"
225 while [ $# -gt 1 ] ; do
226 # quote to make sure that no globbing is done (particularly on
227 # ${oldcpu}) prior to calling replace-flags
228 replace-flags "-march=${1}" "-march=${newcpu}"
229 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
230 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
231 shift
232 done
233 return 0
234}
235
236_is_flagq() {
237 local x
238 for x in ${!1} ; do
239 [[ ${x} == $2 ]] && return 0
240 done
241 return 1
242}
243
244is-flagq() {
245 [[ -n $2 ]] && die "Usage: is-flag <flag>"
246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
247}
248
249is-flag() {
250 is-flagq "$@" && echo true
251}
252
253is-ldflagq() {
254 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
255 _is_flagq LDFLAGS $1
256}
257
258is-ldflag() {
259 is-ldflagq "$@" && echo true
260}
66 261
67filter-mfpmath() { 262filter-mfpmath() {
68 for a in $CFLAGS; do 263 local orig_mfpmath new_math prune_math
69 if [ "${a:0:8}" == "-mfpmath" ]; then
70 orig_mfpmath=$a
71 fi
72 done
73 264
74 mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )" 265 # save the original -mfpmath flag
75 for b in $@; do 266 orig_mfpmath=$(get-flag -mfpmath)
76 mfpmath="${mfpmath/$b}" 267 # get the value of the current -mfpmath flag
268 new_math=$(get-flag mfpmath)
269 new_math=" ${new_math//,/ } "
270 # figure out which math values are to be removed
271 prune_math=""
272 for prune_math in "$@" ; do
273 new_math=${new_math/ ${prune_math} / }
77 done 274 done
275 new_math=$(echo ${new_math})
276 new_math=${new_math// /,}
78 277
79 if [ -z "${mfpmath/ }" ]; then 278 if [[ -z ${new_math} ]] ; then
279 # if we're removing all user specified math values are
280 # slated for removal, then we just filter the flag
80 filter-flags "$orig_mfpmath" 281 filter-flags ${orig_mfpmath}
81 else 282 else
82 new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )" 283 # if we only want to filter some of the user specified
83 replace-flags "$orig_mfpmath" "$new_mfpmath" 284 # math values, then we replace the current flag
285 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
84 fi 286 fi
85}
86
87filter-flags() {
88 # we do two loops to avoid the first and last char from being chomped.
89 for x in $@ ; do
90 case "${x}" in
91 -fPIC) etexec-flags;;
92 -fstack-protector) fstack-flags;;
93 *) ;;
94 esac
95 done
96 # we do this fancy spacing stuff so as to not filter
97 # out part of a flag ... we want flag atoms ! :D
98 CFLAGS=" ${CFLAGS} "
99 CXXFLAGS=" ${CXXFLAGS} "
100 for x in $@ ; do
101 CFLAGS="${CFLAGS/ ${x} / }"
102 CXXFLAGS="${CXXFLAGS/ ${x} / }"
103 done
104 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
105 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
106}
107
108append-flags() {
109 CFLAGS="${CFLAGS} $@"
110 CXXFLAGS="${CXXFLAGS} $@"
111 for x in $@; do
112 [ "${x}" = "-fno-stack-protector" ] && fstack-flags
113 done
114 return 0
115}
116
117replace-flags() {
118 CFLAGS="${CFLAGS/${1}/${2} }"
119 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
120 return 0
121}
122
123is-flag() {
124 for x in ${CFLAGS} ${CXXFLAGS} ; do
125 if [ "${x}" == "$1" ] ; then
126 echo true
127 return 0 287 return 0
128 fi
129 done
130 return 1
131} 288}
132 289
133strip-flags() { 290strip-flags() {
291 local x y flag NEW_CFLAGS NEW_CXXFLAGS
292
293 setup-allowed-flags
294
134 local NEW_CFLAGS="" 295 local NEW_CFLAGS=""
135 local NEW_CXXFLAGS="" 296 local NEW_CXXFLAGS=""
136 297
137 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 298 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
138 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 299 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
139 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
140 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 300 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
141 fi 301 fi
142 302
143 set -f 303 set -f # disable pathname expansion
144 304
145 for x in ${CFLAGS} 305 for x in ${CFLAGS}; do
146 do
147 for y in ${ALLOWED_FLAGS} 306 for y in ${ALLOWED_FLAGS}; do
148 do
149 flag=${x%%=*} 307 flag=${x%%=*}
150 if [ "${flag%%${y}}" = "" ] 308 if [ "${flag%%${y}}" = "" ] ; then
151 then
152 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 309 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
153 break 310 break
154 fi 311 fi
155 done 312 done
156 done 313 done
157 314
158 for x in ${CXXFLAGS} 315 for x in ${CXXFLAGS}; do
159 do
160 for y in ${ALLOWED_FLAGS} 316 for y in ${ALLOWED_FLAGS}; do
161 do
162 flag=${x%%=*} 317 flag=${x%%=*}
163 if [ "${flag%%${y}}" = "" ] 318 if [ "${flag%%${y}}" = "" ] ; then
164 then
165 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 319 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
166 break 320 break
167 fi 321 fi
168 done 322 done
169 done 323 done
170 324
171 set +f 325 # In case we filtered out all optimization flags fallback to -O2
326 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
327 NEW_CFLAGS="${NEW_CFLAGS} -O2"
328 fi
329 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
330 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
331 fi
172 332
173 [ `use debug` ] \ 333 set +f # re-enable pathname expansion
174 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
175 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
176 334
177 export CFLAGS="${NEW_CFLAGS}" 335 export CFLAGS="${NEW_CFLAGS}"
178 export CXXFLAGS="${NEW_CXXFLAGS}" 336 export CXXFLAGS="${NEW_CXXFLAGS}"
337 return 0
338}
339
340test-flag-PROG() {
341 local comp=$1
342 local flags="$2"
343
344 [[ -z ${comp} || -z ${flags} ]] && \
345 return 1
346
347 local PROG=$(tc-get${comp})
348 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
349 > /dev/null 2>&1
350}
351
352# Returns true if C compiler support given flag
353test-flag-CC() { test-flag-PROG "CC" "$1"; }
354
355# Returns true if C++ compiler support given flag
356test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
357
358test-flags-PROG() {
359 local comp=$1
360 local flags
361 local x
362
363 shift
364
365 [[ -z ${comp} ]] && return 1
366
367 x=""
368 for x in "$@" ; do
369 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
370 done
371
372 echo "${flags}"
373
374 # Just bail if we dont have any flags
375 [[ -n ${flags} ]]
376}
377
378# Returns (echo's) the given flags supported by the C compiler
379test-flags-CC() { test-flags-PROG "CC" "$@"; }
380
381# Returns (echo's) the given flags supported by the C++ compiler
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383
384# Short-hand that should hopefully work for both C and C++ compiler, but
385# its really only present due to the append-flags() abomination.
386test-flags() { test-flags-CC "$@"; }
387
388# Depriciated, use test-flags()
389test_flag() {
390 ewarn "test_flag: deprecated, please use test-flags()!" >&2
391
392 test-flags-CC "$@"
393}
394
395test_version_info() {
396 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
397 return 0
398 else
399 return 1
400 fi
401}
402
403strip-unsupported-flags() {
404 export CFLAGS=$(test-flags-CC ${CFLAGS})
405 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
179} 406}
180 407
181get-flag() { 408get-flag() {
182 local findflag="$1" 409 local f findflag="$1"
410
411 # this code looks a little flaky but seems to work for
412 # everything we want ...
413 # for example, if CFLAGS="-march=i686":
414 # `get-flag -march` == "-march=i686"
415 # `get-flag march` == "i686"
183 for f in ${CFLAGS} ${CXXFLAGS} ; do 416 for f in ${CFLAGS} ${CXXFLAGS} ; do
184 if [ "${f/${findflag}}" != "${f}" ] ; then 417 if [ "${f/${findflag}}" != "${f}" ] ; then
185 echo "${f/-${findflag}=}" 418 printf "%s\n" "${f/-${findflag}=}"
186 return 0 419 return 0
187 fi 420 fi
188 done 421 done
189 return 1 422 return 1
190} 423}
191 424
425# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
426has_hardened() {
427 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
428
429 test_version_info Hardened && return 0
430 # The specs file wont exist unless gcc has GCC_SPECS support
431 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
432}
433
434# DEPRECATED - use gcc-specs-pie from toolchain-funcs
435# indicate whether PIC is set
436has_pic() {
437 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
438
439 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
440 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
441 gcc-specs-pie
442}
443
444# DEPRECATED - use gcc-specs-pie from toolchain-funcs
445# indicate whether PIE is set
446has_pie() {
447 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
448
449 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
450 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
451 gcc-specs-pie
452}
453
454# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
455# indicate whether code for SSP is being generated for all functions
456has_ssp_all() {
457 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
458
459 # note; this matches only -fstack-protector-all
460 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
461 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
462 gcc-specs-ssp-all
463}
464
465# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
466# indicate whether code for SSP is being generated
467has_ssp() {
468 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
469
470 # note; this matches both -fstack-protector and -fstack-protector-all
471 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
472 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
473 gcc-specs-ssp
474}
475
476has_m64() {
477 # this doesnt test if the flag is accepted, it tests if the flag
478 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
479 # please dont replace this function with test_flag in some future
480 # clean-up!
481
482 local temp="$(emktemp)"
483 echo "int main() { return(0); }" > "${temp}".c
484 MY_CC=$(tc-getCC)
485 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
486 local ret=$?
487 rm -f "${temp}".c
488 [[ ${ret} != 1 ]] && return 0
489 return 1
490}
491
492has_m32() {
493 # this doesnt test if the flag is accepted, it tests if the flag
494 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
495 # please dont replace this function with test_flag in some future
496 # clean-up!
497
498 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
499
500 local temp=$(emktemp)
501 echo "int main() { return(0); }" > "${temp}".c
502 MY_CC=$(tc-getCC)
503 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
504 local ret=$?
505 rm -f "${temp}".c
506 [[ ${ret} != 1 ]] && return 0
507 return 1
508}
509
192replace-sparc64-flags() { 510replace-sparc64-flags() {
193 local SPARC64_CPUS="ultrasparc v9" 511 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
194 512
195 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
196 then
197 for x in ${SPARC64_CPUS} 514 for x in ${SPARC64_CPUS}; do
198 do
199 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 515 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
200 done 516 done
201 else 517 else
202 for x in ${SPARC64_CPUS} 518 for x in ${SPARC64_CPUS}; do
203 do
204 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 519 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
205 done 520 done
206 fi 521 fi
207 522
208 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 523 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
209 then
210 for x in ${SPARC64_CPUS} 524 for x in ${SPARC64_CPUS}; do
211 do
212 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 525 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
213 done 526 done
214 else 527 else
215 for x in ${SPARC64_CPUS} 528 for x in ${SPARC64_CPUS}; do
216 do
217 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 529 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
218 done 530 done
219 fi 531 fi
532
533 export CFLAGS CXXFLAGS
220} 534}
221 535
222append-ldflags() { 536append-ldflags() {
537 [[ -z $* ]] && return 0
223 LDFLAGS="${LDFLAGS} $@" 538 export LDFLAGS="${LDFLAGS} $*"
224 return 0 539 return 0
225} 540}
226 541
227etexec-flags() { 542# Remove flags from LDFLAGS - it's up to the ebuild to filter
228 has_version 'sys-devel/hardened-gcc' && { 543# CFLAGS and CXXFLAGS via filter-flags if they need to.
229 debug-print ">>> appending flags -yet_exec" 544filter-ldflags() {
230 append-flags -yet_exec 545 _filter-var LDFLAGS "$@"
231 append-ldflags -yet_exec 546 return 0
232 }
233} 547}
234 548
235fstack-flags() { 549# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
236 has_version 'sys-devel/hardened-gcc' && { 550# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
237 debug-print ">>> appending flags -yno_propolice" 551# to gcc where it needs the '-Wl,'.
238 append-flags -yno_propolice 552raw-ldflags() {
239 append-ldflags -yno_propolice 553 local x input="$@"
240 } 554 [[ -z ${input} ]] && input=${LDFLAGS}
555 set --
556 for x in ${input} ; do
557 x=${x#-Wl,}
558 set -- "$@" ${x//,/ }
559 done
560 echo "$@"
241} 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}
579
580
581# Some tests for when we screw with things and want to make
582# sure we didn't break anything
583#TESTS() {
584# CFLAGS="-a -b -c=1"
585# CXXFLAGS="-x -y -z=2"
586# LDFLAGS="-l -m -n=3"
587#
588# die() { exit 1; }
589# (is-flag 1 2 3) && die
590# (is-ldflag 1 2 3) && die
591#
592# is-flagq -l && die
593# is-ldflagq -a && die
594# is-flagq -a || die
595# is-flagq -x || die
596# is-ldflagq -n=* || die
597# is-ldflagq -n && die
598#
599# strip-unsupported-flags
600# [[ ${CFLAGS} == "-c=1" ]] || die
601# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
602#
603# echo "All tests pass"
604#}
605#TESTS
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