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1# Copyright 1999-2009 Gentoo Foundation 1# Copyright 1999-2012 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 1.152 2011/07/12 04:08:52 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.173 2012/05/31 00:29:06 vapier Exp $
4 4
5# @ECLASS: flag-o-matic.eclass 5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER: 6# @MAINTAINER:
7# toolchain@gentoo.org 7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags 8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION: 9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely 10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds. 11# and safely manage toolchain flags in their builds.
12 12
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
13inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
14 17
15################ DEPRECATED functions ################ 18# Return all the flag variables that our high level funcs operate on.
16# The following are still present to avoid breaking existing 19all-flag-vars() {
17# code more than necessary; however they are deprecated. Please 20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
18# use gcc-specs-* from toolchain-funcs.eclass instead, if you 21}
19# need to know which hardened techs are active in the compiler.
20# See bug #100974
21#
22# has_hardened
23# has_pie
24# has_pic
25# has_ssp_all
26# has_ssp
27
28 22
29# {C,CXX,F,FC}FLAGS that we allow in strip-flags 23# {C,CXX,F,FC}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed 24# Note: shell globs and character lists are allowed
31setup-allowed-flags() { 25setup-allowed-flags() {
32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
33 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive" 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w" 33 ALLOWED_FLAGS+=" -W* -w"
41 fi 34
42 # allow a bunch of flags that negate features / control ABI 35 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer" 37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \ 40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \ 41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
48 -mno-popcnt -mno-abm \
49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \ 42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \ 44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
56 -msecure-plt -m*-toc -D* -U*"
57 49
58 # 4.5 50 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp" 51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 # 4.6 52 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \ 53 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
62 -mno-bmi -mno-tbm"
63 54
64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 55 export ALLOWED_FLAGS
65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
67 return 0 56 return 0
68} 57}
69 58
70# inverted filters for hardened compiler. This is trying to unpick 59# inverted filters for hardened compiler. This is trying to unpick
71# the hardened compiler defaults. 60# the hardened compiler defaults.
94 83
95# Remove occurrences of strings from variable given in $1 84# Remove occurrences of strings from variable given in $1
96# Strings removed are matched as globs, so for example 85# Strings removed are matched as globs, so for example
97# '-O*' would remove -O1, -O2 etc. 86# '-O*' would remove -O1, -O2 etc.
98_filter-var() { 87_filter-var() {
99 local f x VAR VAL 88 local f x var=$1 new=()
100 declare -a new
101
102 VAR=$1
103 shift 89 shift
104 eval VAL=\${${VAR}} 90
105 for f in ${VAL}; do 91 for f in ${!var} ; do
106 for x in "$@"; do 92 for x in "$@" ; do
107 # Note this should work with globs like -O* 93 # Note this should work with globs like -O*
108 [[ ${f} == ${x} ]] && continue 2 94 [[ ${f} == ${x} ]] && continue 2
109 done 95 done
110 eval new\[\${\#new\[@]}]=\${f} 96 new+=( "${f}" )
111 done 97 done
112 eval export ${VAR}=\${new\[*]} 98 eval export ${var}=\""${new[*]}"\"
113} 99}
114 100
115# @FUNCTION: filter-flags 101# @FUNCTION: filter-flags
116# @USAGE: <flags> 102# @USAGE: <flags>
117# @DESCRIPTION: 103# @DESCRIPTION:
118# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs. 104# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
119filter-flags() { 105filter-flags() {
120 _filter-hardened "$@" 106 _filter-hardened "$@"
107 local v
108 for v in $(all-flag-vars) ; do
121 _filter-var CFLAGS "$@" 109 _filter-var ${v} "$@"
122 _filter-var CPPFLAGS "$@" 110 done
123 _filter-var CXXFLAGS "$@"
124 _filter-var FFLAGS "$@"
125 _filter-var FCFLAGS "$@"
126 return 0 111 return 0
127} 112}
128 113
129# @FUNCTION: filter-lfs-flags 114# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION: 115# @DESCRIPTION:
131# Remove flags that enable Large File Support. 116# Remove flags that enable Large File Support.
132filter-lfs-flags() { 117filter-lfs-flags() {
133 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
124}
125
126# @FUNCTION: filter-ldflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Remove particular <flags> from LDFLAGS. Accepts shell globs.
130filter-ldflags() {
131 _filter-var LDFLAGS "$@"
132 return 0
135} 133}
136 134
137# @FUNCTION: append-cppflags 135# @FUNCTION: append-cppflags
138# @USAGE: <flags> 136# @USAGE: <flags>
139# @DESCRIPTION: 137# @DESCRIPTION:
140# Add extra <flags> to the current CPPFLAGS. 138# Add extra <flags> to the current CPPFLAGS.
141append-cppflags() { 139append-cppflags() {
142 [[ -z $* ]] && return 0 140 [[ $# -eq 0 ]] && return 0
143 export CPPFLAGS="${CPPFLAGS} $*" 141 export CPPFLAGS="${CPPFLAGS} $*"
144 return 0 142 return 0
145} 143}
146 144
147# @FUNCTION: append-cflags 145# @FUNCTION: append-cflags
148# @USAGE: <flags> 146# @USAGE: <flags>
149# @DESCRIPTION: 147# @DESCRIPTION:
150# Add extra <flags> to the current CFLAGS. 148# Add extra <flags> to the current CFLAGS.
151append-cflags() { 149append-cflags() {
152 [[ -z $* ]] && return 0 150 [[ $# -eq 0 ]] && return 0
153 export CFLAGS="${CFLAGS} $*" 151 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
154 return 0 152 return 0
155} 153}
156 154
157# @FUNCTION: append-cxxflags 155# @FUNCTION: append-cxxflags
158# @USAGE: <flags> 156# @USAGE: <flags>
159# @DESCRIPTION: 157# @DESCRIPTION:
160# Add extra <flags> to the current CXXFLAGS. 158# Add extra <flags> to the current CXXFLAGS.
161append-cxxflags() { 159append-cxxflags() {
162 [[ -z $* ]] && return 0 160 [[ $# -eq 0 ]] && return 0
163 export CXXFLAGS="${CXXFLAGS} $*" 161 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
164 return 0 162 return 0
165} 163}
166 164
167# @FUNCTION: append-fflags 165# @FUNCTION: append-fflags
168# @USAGE: <flags> 166# @USAGE: <flags>
169# @DESCRIPTION: 167# @DESCRIPTION:
170# Add extra <flags> to the current {F,FC}FLAGS. 168# Add extra <flags> to the current {F,FC}FLAGS.
171append-fflags() { 169append-fflags() {
172 [[ -z $* ]] && return 0 170 [[ $# -eq 0 ]] && return 0
173 export FFLAGS="${FFLAGS} $*" 171 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
174 export FCFLAGS="${FCFLAGS} $*" 172 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
175 return 0 173 return 0
176} 174}
177 175
178# @FUNCTION: append-lfs-flags 176# @FUNCTION: append-lfs-flags
179# @DESCRIPTION: 177# @DESCRIPTION:
180# Add flags that enable Large File Support. 178# Add flags that enable Large File Support.
181append-lfs-flags() { 179append-lfs-flags() {
182 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 180 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
181 # see comments in filter-lfs-flags func for meaning of these
183 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 182 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
183}
184
185# @FUNCTION: append-ldflags
186# @USAGE: <flags>
187# @DESCRIPTION:
188# Add extra <flags> to the current LDFLAGS.
189append-ldflags() {
190 [[ $# -eq 0 ]] && return 0
191 local flag
192 for flag in "$@"; do
193 [[ ${flag} == -l* ]] && \
194 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
195 done
196
197 export LDFLAGS="${LDFLAGS} $*"
198 return 0
184} 199}
185 200
186# @FUNCTION: append-flags 201# @FUNCTION: append-flags
187# @USAGE: <flags> 202# @USAGE: <flags>
188# @DESCRIPTION: 203# @DESCRIPTION:
189# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 204# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
190append-flags() { 205append-flags() {
191 [[ -z $* ]] && return 0 206 [[ $# -eq 0 ]] && return 0
207 case " $* " in
208 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
209 *' '-L*|\
210 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
211 esac
192 append-cflags "$@" 212 append-cflags "$@"
193 append-cxxflags "$@" 213 append-cxxflags "$@"
194 append-fflags "$@" 214 append-fflags "$@"
195 return 0 215 return 0
196} 216}
198# @FUNCTION: replace-flags 218# @FUNCTION: replace-flags
199# @USAGE: <old> <new> 219# @USAGE: <old> <new>
200# @DESCRIPTION: 220# @DESCRIPTION:
201# Replace the <old> flag with <new>. Accepts shell globs for <old>. 221# Replace the <old> flag with <new>. Accepts shell globs for <old>.
202replace-flags() { 222replace-flags() {
203 [[ $# != 2 ]] \
204 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 223 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
205 && die "replace-flags takes 2 arguments, not $#"
206 224
207 local f fset 225 local f var new
208 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS 226 for var in $(all-flag-vars) ; do
209
210 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
211 # Looping over the flags instead of using a global 227 # Looping over the flags instead of using a global
212 # substitution ensures that we're working with flag atoms. 228 # substitution ensures that we're working with flag atoms.
213 # Otherwise globs like -O* have the potential to wipe out the 229 # Otherwise globs like -O* have the potential to wipe out the
214 # list of flags. 230 # list of flags.
231 new=()
215 for f in ${!fset}; do 232 for f in ${!var} ; do
216 # Note this should work with globs like -O* 233 # Note this should work with globs like -O*
217 [[ ${f} == ${1} ]] && f=${2} 234 [[ ${f} == ${1} ]] && f=${2}
218 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 235 new+=( "${f}" )
219 done 236 done
220 eval export ${fset}=\${new_${fset}\[*]} 237 eval export ${var}=\""${new[*]}"\"
221 done 238 done
222 239
223 return 0 240 return 0
224} 241}
225 242
253# @USAGE: <flag> 270# @USAGE: <flag>
254# @DESCRIPTION: 271# @DESCRIPTION:
255# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. 272# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
256is-flagq() { 273is-flagq() {
257 [[ -n $2 ]] && die "Usage: is-flag <flag>" 274 [[ -n $2 ]] && die "Usage: is-flag <flag>"
258 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1 275
276 local var
277 for var in $(all-flag-vars) ; do
278 _is_flagq ${var} "$1" && return 0
279 done
280 return 1
259} 281}
260 282
261# @FUNCTION: is-flag 283# @FUNCTION: is-flag
262# @USAGE: <flag> 284# @USAGE: <flag>
263# @DESCRIPTION: 285# @DESCRIPTION:
319 341
320# @FUNCTION: strip-flags 342# @FUNCTION: strip-flags
321# @DESCRIPTION: 343# @DESCRIPTION:
322# Strip C[XX]FLAGS of everything except known good/safe flags. 344# Strip C[XX]FLAGS of everything except known good/safe flags.
323strip-flags() { 345strip-flags() {
324 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS 346 local x y var
325 347
326 setup-allowed-flags 348 setup-allowed-flags
327 349
328 local NEW_CFLAGS=""
329 local NEW_CXXFLAGS=""
330 local NEW_FFLAGS=""
331 local NEW_FCFLAGS=""
332
333 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
334 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
335 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
336 fi
337
338 set -f # disable pathname expansion 350 set -f # disable pathname expansion
339 351
340 for x in ${CFLAGS}; do 352 for var in $(all-flag-vars) ; do
353 local new=()
354
355 for x in ${!var} ; do
356 local flag=${x%%=*}
341 for y in ${ALLOWED_FLAGS}; do 357 for y in ${ALLOWED_FLAGS} ; do
342 flag=${x%%=*}
343 if [ "${flag%%${y}}" = "" ] ; then 358 if [[ -z ${flag%%${y}} ]] ; then
344 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 359 new+=( "${x}" )
345 break 360 break
346 fi 361 fi
347 done 362 done
348 done 363 done
349 364
350 for x in ${CXXFLAGS}; do
351 for y in ${ALLOWED_FLAGS}; do
352 flag=${x%%=*}
353 if [ "${flag%%${y}}" = "" ] ; then
354 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
355 break
356 fi
357 done
358 done
359
360 for x in ${FFLAGS}; do
361 for y in ${ALLOWED_FLAGS}; do
362 flag=${x%%=*}
363 if [ "${flag%%${y}}" = "" ] ; then
364 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
365 break
366 fi
367 done
368 done
369
370 for x in ${FCFLAGS}; do
371 for y in ${ALLOWED_FLAGS}; do
372 flag=${x%%=*}
373 if [ "${flag%%${y}}" = "" ] ; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
375 break
376 fi
377 done
378 done
379
380 # In case we filtered out all optimization flags fallback to -O2 365 # In case we filtered out all optimization flags fallback to -O2
381 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 366 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
382 NEW_CFLAGS="${NEW_CFLAGS} -O2" 367 new+=( -O2 )
383 fi 368 fi
384 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 369
385 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 370 eval export ${var}=\""${new[*]}"\"
386 fi 371 done
387 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
388 NEW_FFLAGS="${NEW_FFLAGS} -O2"
389 fi
390 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
391 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
392 fi
393 372
394 set +f # re-enable pathname expansion 373 set +f # re-enable pathname expansion
395 374
396 export CFLAGS="${NEW_CFLAGS}"
397 export CXXFLAGS="${NEW_CXXFLAGS}"
398 export FFLAGS="${NEW_FFLAGS}"
399 export FCFLAGS="${NEW_FCFLAGS}"
400 return 0 375 return 0
401} 376}
402 377
403test-flag-PROG() { 378test-flag-PROG() {
404 local comp=$1 379 local comp=$1
405 local flags="$2" 380 local flag=$2
406 381
407 [[ -z ${comp} || -z ${flags} ]] && return 1 382 [[ -z ${comp} || -z ${flag} ]] && return 1
408 383
409 # use -c so we can test the assembler as well 384 # use -c so we can test the assembler as well
410 local PROG=$(tc-get${comp}) 385 local PROG=$(tc-get${comp})
411 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \ 386 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
412 > /dev/null 2>&1 387 > /dev/null 2>&1
413} 388}
414 389
415# @FUNCTION: test-flag-CC 390# @FUNCTION: test-flag-CC
416# @USAGE: <flag> 391# @USAGE: <flag>
443 418
444 shift 419 shift
445 420
446 [[ -z ${comp} ]] && return 1 421 [[ -z ${comp} ]] && return 1
447 422
448 x=""
449 for x in "$@" ; do 423 for x in "$@" ; do
450 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 424 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
451 done 425 done
452 426
453 echo "${flags}" 427 echo "${flags}"
513# @FUNCTION: get-flag 487# @FUNCTION: get-flag
514# @USAGE: <flag> 488# @USAGE: <flag>
515# @DESCRIPTION: 489# @DESCRIPTION:
516# Find and echo the value for a particular flag. Accepts shell globs. 490# Find and echo the value for a particular flag. Accepts shell globs.
517get-flag() { 491get-flag() {
518 local f findflag="$1" 492 local f var findflag="$1"
519 493
520 # this code looks a little flaky but seems to work for 494 # this code looks a little flaky but seems to work for
521 # everything we want ... 495 # everything we want ...
522 # for example, if CFLAGS="-march=i686": 496 # for example, if CFLAGS="-march=i686":
523 # `get-flag -march` == "-march=i686" 497 # `get-flag -march` == "-march=i686"
524 # `get-flag march` == "i686" 498 # `get-flag march` == "i686"
525 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do 499 for var in $(all-flag-vars) ; do
500 for f in ${!var} ; do
526 if [ "${f/${findflag}}" != "${f}" ] ; then 501 if [ "${f/${findflag}}" != "${f}" ] ; then
527 printf "%s\n" "${f/-${findflag}=}" 502 printf "%s\n" "${f/-${findflag}=}"
528 return 0 503 return 0
529 fi 504 fi
505 done
530 done 506 done
531 return 1 507 return 1
532} 508}
533
534# DEAD FUNCS. Remove by Dec 2011.
535test_flag() { die "$0: deprecated, please use test-flags()!" ; }
536has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
537has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
538has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
539has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
540has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
541 509
542# @FUNCTION: has_m64 510# @FUNCTION: has_m64
543# @DESCRIPTION: 511# @DESCRIPTION:
544# This doesn't test if the flag is accepted, it tests if the flag actually 512# This doesn't test if the flag is accepted, it tests if the flag actually
545# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 513# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
546# return code is 0, else the return code is 1. 514# return code is 0, else the return code is 1.
547has_m64() { 515has_m64() {
516 eqawarn "${FUNCNAME}: don't use this anymore"
517
548 # this doesnt test if the flag is accepted, it tests if the flag 518 # this doesnt test if the flag is accepted, it tests if the flag
549 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 519 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
550 # please dont replace this function with test_flag in some future 520 # please dont replace this function with test_flag in some future
551 # clean-up! 521 # clean-up!
552 522
558 rm -f "${temp}".c 528 rm -f "${temp}".c
559 [[ ${ret} != 1 ]] && return 0 529 [[ ${ret} != 1 ]] && return 0
560 return 1 530 return 1
561} 531}
562 532
563# @FUNCTION: has_m32
564# @DESCRIPTION:
565# This doesn't test if the flag is accepted, it tests if the flag actually
566# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
567# code is 0, else return code is 1.
568has_m32() { 533has_m32() {
569 # this doesnt test if the flag is accepted, it tests if the flag 534 die "${FUNCNAME}: don't use this anymore"
570 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
571 # please dont replace this function with test_flag in some future
572 # clean-up!
573
574 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
575
576 local temp=$(emktemp)
577 echo "int main() { return(0); }" > "${temp}".c
578 MY_CC=$(tc-getCC)
579 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
580 local ret=$?
581 rm -f "${temp}".c
582 [[ ${ret} != 1 ]] && return 0
583 return 1
584} 535}
585 536
586# @FUNCTION: replace-sparc64-flags 537# @FUNCTION: replace-sparc64-flags
587# @DESCRIPTION: 538# @DESCRIPTION:
588# Sets mcpu to v8 and uses the original value as mtune if none specified. 539# Sets mcpu to v8 and uses the original value as mtune if none specified.
615# @FUNCTION: append-libs 566# @FUNCTION: append-libs
616# @USAGE: <libs> 567# @USAGE: <libs>
617# @DESCRIPTION: 568# @DESCRIPTION:
618# Add extra <libs> to the current LIBS. 569# Add extra <libs> to the current LIBS.
619append-libs() { 570append-libs() {
620 [[ -z $* ]] && return 0 571 [[ $# -eq 0 ]] && return 0
621 local flag 572 local flag
622 for flag in "$@"; do 573 for flag in "$@"; do
623 [[ ${flag} == -l* ]] && flag=${flag#-l} 574 [[ ${flag} == -l* ]] && flag=${flag#-l}
624 export LIBS="${LIBS} -l${flag}" 575 export LIBS="${LIBS} -l${flag}"
625 done 576 done
626 577
627 return 0 578 return 0
628} 579}
629 580
630# @FUNCTION: append-ldflags
631# @USAGE: <flags>
632# @DESCRIPTION:
633# Add extra <flags> to the current LDFLAGS.
634append-ldflags() {
635 [[ -z $* ]] && return 0
636 local flag
637 for flag in "$@"; do
638 [[ ${flag} == -l* ]] && \
639 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
640 done
641
642 export LDFLAGS="${LDFLAGS} $*"
643 return 0
644}
645
646# @FUNCTION: filter-ldflags
647# @USAGE: <flags>
648# @DESCRIPTION:
649# Remove particular <flags> from LDFLAGS. Accepts shell globs.
650filter-ldflags() {
651 _filter-var LDFLAGS "$@"
652 return 0
653}
654
655# @FUNCTION: raw-ldflags 581# @FUNCTION: raw-ldflags
656# @USAGE: <flags> 582# @USAGE: [flags]
657# @DESCRIPTION: 583# @DESCRIPTION:
658# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 584# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
659# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 585# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
660# to gcc where it needs the '-Wl,'. 586# to gcc where it needs the '-Wl,'.
587#
588# If no flags are specified, then default to ${LDFLAGS}.
661raw-ldflags() { 589raw-ldflags() {
662 local x input="$@" 590 local x input="$@"
663 [[ -z ${input} ]] && input=${LDFLAGS} 591 [[ -z ${input} ]] && input=${LDFLAGS}
664 set -- 592 set --
665 for x in ${input} ; do 593 for x in ${input} ; do
676 *GNU*) # GNU ld 604 *GNU*) # GNU ld
677 echo "-Wl,--no-as-needed" ;; 605 echo "-Wl,--no-as-needed" ;;
678 esac 606 esac
679} 607}
680 608
681# Some tests for when we screw with things and want to make 609fi
682# sure we didn't break anything
683#TESTS() {
684# CFLAGS="-a -b -c=1"
685# CXXFLAGS="-x -y -z=2"
686# LDFLAGS="-l -m -n=3"
687#
688# die() { exit 1; }
689# (is-flag 1 2 3) && die
690# (is-ldflag 1 2 3) && die
691#
692# is-flagq -l && die
693# is-ldflagq -a && die
694# is-flagq -a || die
695# is-flagq -x || die
696# is-ldflagq -n=* || die
697# is-ldflagq -n && die
698#
699# strip-unsupported-flags
700# [[ ${CFLAGS} == "-c=1" ]] || die
701# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
702#
703# echo "All tests pass"
704#}
705#TESTS

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