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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 1.133 2009/04/04 17:57:54 grobian 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="${ALLOWED_FLAGS} -fno-ident" 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${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="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow" 37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${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-3dnow \ 40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \ 44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
54 -msecure-plt -m*-toc -D* -U*"
55
56 # killing these two on OSX/Intel will disable SSE, resulting in failing
57 # compilations, as the headers expect SSE to be enabled (Apple knows what
58 # hardware they run on afterall, don't they?)
59 [[ ${CHOST} == i?86-apple-darwin* ]] \
60 && ALLOWED_FLAGS="${ALLOWED_FLAGS} -march=prescott -march=nocona"
61 49
62 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 50 # 4.5
63 # NOTE: currently -Os have issues with gcc3 and K6* arch's 51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
64 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 52 # 4.6
53 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
54
55 export ALLOWED_FLAGS
65 return 0 56 return 0
66} 57}
67 58
68# inverted filters for hardened compiler. This is trying to unpick 59# inverted filters for hardened compiler. This is trying to unpick
69# the hardened compiler defaults. 60# the hardened compiler defaults.
92 83
93# Remove occurrences of strings from variable given in $1 84# Remove occurrences of strings from variable given in $1
94# Strings removed are matched as globs, so for example 85# Strings removed are matched as globs, so for example
95# '-O*' would remove -O1, -O2 etc. 86# '-O*' would remove -O1, -O2 etc.
96_filter-var() { 87_filter-var() {
97 local f x VAR VAL 88 local f x var=$1 new=()
98 declare -a new
99
100 VAR=$1
101 shift 89 shift
102 eval VAL=\${${VAR}} 90
103 for f in ${VAL}; do 91 for f in ${!var} ; do
104 for x in "$@"; do 92 for x in "$@" ; do
105 # Note this should work with globs like -O* 93 # Note this should work with globs like -O*
106 [[ ${f} == ${x} ]] && continue 2 94 [[ ${f} == ${x} ]] && continue 2
107 done 95 done
108 eval new\[\${\#new\[@]}]=\${f} 96 new+=( "${f}" )
109 done 97 done
110 eval export ${VAR}=\${new\[*]} 98 eval export ${var}=\""${new[*]}"\"
111} 99}
112 100
113# @FUNCTION: filter-flags 101# @FUNCTION: filter-flags
114# @USAGE: <flags> 102# @USAGE: <flags>
115# @DESCRIPTION: 103# @DESCRIPTION:
116# 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.
117filter-flags() { 105filter-flags() {
118 _filter-hardened "$@" 106 _filter-hardened "$@"
107 local v
108 for v in $(all-flag-vars) ; do
119 _filter-var CFLAGS "$@" 109 _filter-var ${v} "$@"
120 _filter-var CPPFLAGS "$@" 110 done
121 _filter-var CXXFLAGS "$@"
122 _filter-var FFLAGS "$@"
123 _filter-var FCFLAGS "$@"
124 return 0 111 return 0
125} 112}
126 113
127# @FUNCTION: filter-lfs-flags 114# @FUNCTION: filter-lfs-flags
128# @DESCRIPTION: 115# @DESCRIPTION:
129# Remove flags that enable Large File Support. 116# Remove flags that enable Large File Support.
130filter-lfs-flags() { 117filter-lfs-flags() {
131 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
132 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
124}
125
126# @FUNCTION: filter-ldflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Remove particular <flags> from LDFLAGS. Accepts shell globs.
130filter-ldflags() {
131 _filter-var LDFLAGS "$@"
132 return 0
133} 133}
134 134
135# @FUNCTION: append-cppflags 135# @FUNCTION: append-cppflags
136# @USAGE: <flags> 136# @USAGE: <flags>
137# @DESCRIPTION: 137# @DESCRIPTION:
138# Add extra <flags> to the current CPPFLAGS. 138# Add extra <flags> to the current CPPFLAGS.
139append-cppflags() { 139append-cppflags() {
140 [[ -z $* ]] && return 0 140 [[ $# -eq 0 ]] && return 0
141 export CPPFLAGS="${CPPFLAGS} $*" 141 export CPPFLAGS="${CPPFLAGS} $*"
142 return 0
143}
144
145# @FUNCTION: append-cflags
146# @USAGE: <flags>
147# @DESCRIPTION:
148# Add extra <flags> to the current CFLAGS.
149append-cflags() {
150 [[ $# -eq 0 ]] && return 0
151 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
142 return 0 152 return 0
143} 153}
144 154
145# @FUNCTION: append-cxxflags 155# @FUNCTION: append-cxxflags
146# @USAGE: <flags> 156# @USAGE: <flags>
147# @DESCRIPTION: 157# @DESCRIPTION:
148# Add extra <flags> to the current CXXFLAGS. 158# Add extra <flags> to the current CXXFLAGS.
149append-cxxflags() { 159append-cxxflags() {
150 [[ -z $* ]] && return 0 160 [[ $# -eq 0 ]] && return 0
151 export CXXFLAGS="${CXXFLAGS} $*" 161 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
152 return 0 162 return 0
153} 163}
154 164
155# @FUNCTION: append-fflags 165# @FUNCTION: append-fflags
156# @USAGE: <flags> 166# @USAGE: <flags>
157# @DESCRIPTION: 167# @DESCRIPTION:
158# Add extra <flags> to the current {F,FC}FLAGS. 168# Add extra <flags> to the current {F,FC}FLAGS.
159append-fflags() { 169append-fflags() {
160 [[ -z $* ]] && return 0 170 [[ $# -eq 0 ]] && return 0
161 export FFLAGS="${FFLAGS} $*" 171 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
162 export FCFLAGS="${FCFLAGS} $*" 172 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
163 return 0 173 return 0
164} 174}
165 175
166# @FUNCTION: append-lfs-flags 176# @FUNCTION: append-lfs-flags
167# @DESCRIPTION: 177# @DESCRIPTION:
168# Add flags that enable Large File Support. 178# Add flags that enable Large File Support.
169append-lfs-flags() { 179append-lfs-flags() {
170 [[ -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
171 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
172} 199}
173 200
174# @FUNCTION: append-flags 201# @FUNCTION: append-flags
175# @USAGE: <flags> 202# @USAGE: <flags>
176# @DESCRIPTION: 203# @DESCRIPTION:
177# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 204# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
178append-flags() { 205append-flags() {
179 [[ -z $* ]] && return 0 206 [[ $# -eq 0 ]] && return 0
180 export CFLAGS="${CFLAGS} $*" 207 case " $* " in
181 export CXXFLAGS="${CXXFLAGS} $*" 208 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
182 export FFLAGS="${FFLAGS} $*" 209 *' '-L*|\
183 export FCFLAGS="${FCFLAGS} $*" 210 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
211 esac
212 append-cflags "$@"
213 append-cxxflags "$@"
214 append-fflags "$@"
184 return 0 215 return 0
185} 216}
186 217
187# @FUNCTION: replace-flags 218# @FUNCTION: replace-flags
188# @USAGE: <old> <new> 219# @USAGE: <old> <new>
189# @DESCRIPTION: 220# @DESCRIPTION:
190# Replace the <old> flag with <new>. Accepts shell globs for <old>. 221# Replace the <old> flag with <new>. Accepts shell globs for <old>.
191replace-flags() { 222replace-flags() {
192 [[ $# != 2 ]] \
193 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 223 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
194 && die "replace-flags takes 2 arguments, not $#"
195 224
196 local f fset 225 local f var new
197 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS 226 for var in $(all-flag-vars) ; do
198
199 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
200 # Looping over the flags instead of using a global 227 # Looping over the flags instead of using a global
201 # substitution ensures that we're working with flag atoms. 228 # substitution ensures that we're working with flag atoms.
202 # Otherwise globs like -O* have the potential to wipe out the 229 # Otherwise globs like -O* have the potential to wipe out the
203 # list of flags. 230 # list of flags.
231 new=()
204 for f in ${!fset}; do 232 for f in ${!var} ; do
205 # Note this should work with globs like -O* 233 # Note this should work with globs like -O*
206 [[ ${f} == ${1} ]] && f=${2} 234 [[ ${f} == ${1} ]] && f=${2}
207 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 235 new+=( "${f}" )
208 done 236 done
209 eval export ${fset}=\${new_${fset}\[*]} 237 eval export ${var}=\""${new[*]}"\"
210 done 238 done
211 239
212 return 0 240 return 0
213} 241}
214 242
242# @USAGE: <flag> 270# @USAGE: <flag>
243# @DESCRIPTION: 271# @DESCRIPTION:
244# 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.
245is-flagq() { 273is-flagq() {
246 [[ -n $2 ]] && die "Usage: is-flag <flag>" 274 [[ -n $2 ]] && die "Usage: is-flag <flag>"
247 _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} "$1" && return 0
279 done
280 return 1
248} 281}
249 282
250# @FUNCTION: is-flag 283# @FUNCTION: is-flag
251# @USAGE: <flag> 284# @USAGE: <flag>
252# @DESCRIPTION: 285# @DESCRIPTION:
308 341
309# @FUNCTION: strip-flags 342# @FUNCTION: strip-flags
310# @DESCRIPTION: 343# @DESCRIPTION:
311# Strip C[XX]FLAGS of everything except known good/safe flags. 344# Strip C[XX]FLAGS of everything except known good/safe flags.
312strip-flags() { 345strip-flags() {
313 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS 346 local x y var
314 347
315 setup-allowed-flags 348 setup-allowed-flags
316 349
317 local NEW_CFLAGS=""
318 local NEW_CXXFLAGS=""
319 local NEW_FFLAGS=""
320 local NEW_FCFLAGS=""
321
322 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
323 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
324 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
325 fi
326
327 set -f # disable pathname expansion 350 set -f # disable pathname expansion
328 351
329 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%%=*}
330 for y in ${ALLOWED_FLAGS}; do 357 for y in ${ALLOWED_FLAGS} ; do
331 flag=${x%%=*}
332 if [ "${flag%%${y}}" = "" ] ; then 358 if [[ -z ${flag%%${y}} ]] ; then
333 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 359 new+=( "${x}" )
334 break 360 break
335 fi 361 fi
336 done 362 done
337 done 363 done
338 364
339 for x in ${CXXFLAGS}; do
340 for y in ${ALLOWED_FLAGS}; do
341 flag=${x%%=*}
342 if [ "${flag%%${y}}" = "" ] ; then
343 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
344 break
345 fi
346 done
347 done
348
349 for x in ${FFLAGS}; do
350 for y in ${ALLOWED_FLAGS}; do
351 flag=${x%%=*}
352 if [ "${flag%%${y}}" = "" ] ; then
353 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
354 break
355 fi
356 done
357 done
358
359 for x in ${FCFLAGS}; do
360 for y in ${ALLOWED_FLAGS}; do
361 flag=${x%%=*}
362 if [ "${flag%%${y}}" = "" ] ; then
363 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
364 break
365 fi
366 done
367 done
368
369 # In case we filtered out all optimization flags fallback to -O2 365 # In case we filtered out all optimization flags fallback to -O2
370 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 366 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
371 NEW_CFLAGS="${NEW_CFLAGS} -O2" 367 new+=( -O2 )
372 fi 368 fi
373 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 369
374 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 370 eval export ${var}=\""${new[*]}"\"
375 fi 371 done
376 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
377 NEW_FFLAGS="${NEW_FFLAGS} -O2"
378 fi
379 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
380 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
381 fi
382 372
383 set +f # re-enable pathname expansion 373 set +f # re-enable pathname expansion
384 374
385 export CFLAGS="${NEW_CFLAGS}"
386 export CXXFLAGS="${NEW_CXXFLAGS}"
387 export FFLAGS="${NEW_FFLAGS}"
388 export FCFLAGS="${NEW_FCFLAGS}"
389 return 0 375 return 0
390} 376}
391 377
392test-flag-PROG() { 378test-flag-PROG() {
393 local comp=$1 379 local comp=$1
394 local flags="$2" 380 local flag=$2
395 381
396 [[ -z ${comp} || -z ${flags} ]] && \ 382 [[ -z ${comp} || -z ${flag} ]] && return 1
397 return 1
398 383
384 # use -c so we can test the assembler as well
399 local PROG=$(tc-get${comp}) 385 local PROG=$(tc-get${comp})
400 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 386 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
401 > /dev/null 2>&1 387 > /dev/null 2>&1
402} 388}
403 389
404# @FUNCTION: test-flag-CC 390# @FUNCTION: test-flag-CC
405# @USAGE: <flag> 391# @USAGE: <flag>
432 418
433 shift 419 shift
434 420
435 [[ -z ${comp} ]] && return 1 421 [[ -z ${comp} ]] && return 1
436 422
437 x=""
438 for x in "$@" ; do 423 for x in "$@" ; do
439 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 424 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
440 done 425 done
441 426
442 echo "${flags}" 427 echo "${flags}"
473# @USAGE: <flags> 458# @USAGE: <flags>
474# @DESCRIPTION: 459# @DESCRIPTION:
475# Short-hand that should hopefully work for both C and C++ compiler, but 460# Short-hand that should hopefully work for both C and C++ compiler, but
476# its really only present due to the append-flags() abomination. 461# its really only present due to the append-flags() abomination.
477test-flags() { test-flags-CC "$@"; } 462test-flags() { test-flags-CC "$@"; }
478
479# @FUNCTION: test_flag
480# @DESCRIPTION:
481# DEPRICIATED, use test-flags()
482test_flag() {
483 ewarn "test_flag: deprecated, please use test-flags()!" >&2
484
485 test-flags-CC "$@"
486}
487 463
488# @FUNCTION: test_version_info 464# @FUNCTION: test_version_info
489# @USAGE: <version> 465# @USAGE: <version>
490# @DESCRIPTION: 466# @DESCRIPTION:
491# Returns shell true if the current C compiler version matches <version>, else returns shell false. 467# Returns shell true if the current C compiler version matches <version>, else returns shell false.
511# @FUNCTION: get-flag 487# @FUNCTION: get-flag
512# @USAGE: <flag> 488# @USAGE: <flag>
513# @DESCRIPTION: 489# @DESCRIPTION:
514# 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.
515get-flag() { 491get-flag() {
516 local f findflag="$1" 492 local f var findflag="$1"
517 493
518 # this code looks a little flaky but seems to work for 494 # this code looks a little flaky but seems to work for
519 # everything we want ... 495 # everything we want ...
520 # for example, if CFLAGS="-march=i686": 496 # for example, if CFLAGS="-march=i686":
521 # `get-flag -march` == "-march=i686" 497 # `get-flag -march` == "-march=i686"
522 # `get-flag march` == "i686" 498 # `get-flag march` == "i686"
523 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do 499 for var in $(all-flag-vars) ; do
500 for f in ${!var} ; do
524 if [ "${f/${findflag}}" != "${f}" ] ; then 501 if [ "${f/${findflag}}" != "${f}" ] ; then
525 printf "%s\n" "${f/-${findflag}=}" 502 printf "%s\n" "${f/-${findflag}=}"
526 return 0 503 return 0
527 fi 504 fi
505 done
528 done 506 done
529 return 1 507 return 1
530}
531
532# @FUNCTION: has_hardened
533# @DESCRIPTION:
534# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
535has_hardened() {
536 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
537
538 test_version_info Hardened && return 0
539 # The specs file wont exist unless gcc has GCC_SPECS support
540 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
541}
542
543# @FUNCTION: has_pic
544# @DESCRIPTION:
545# DEPRECATED - use gcc-specs-pie from toolchain-funcs
546# indicate whether PIC is set
547has_pic() {
548 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
549
550 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
551 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
552 gcc-specs-pie
553}
554
555# @FUNCTION: has_pie
556# @DESCRIPTION:
557# DEPRECATED - use gcc-specs-pie from toolchain-funcs
558# indicate whether PIE is set
559has_pie() {
560 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
561
562 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
563 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
564 gcc-specs-pie
565}
566
567# @FUNCTION: has_ssp_all
568# @DESCRIPTION:
569# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
570# indicate whether code for SSP is being generated for all functions
571has_ssp_all() {
572 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
573
574 # note; this matches only -fstack-protector-all
575 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
576 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
577 gcc-specs-ssp-to-all
578}
579
580# @FUNCTION: has_ssp
581# @DESCRIPTION:
582# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
583# indicate whether code for SSP is being generated
584has_ssp() {
585 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
586
587 # note; this matches both -fstack-protector and -fstack-protector-all
588 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
589 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
590 gcc-specs-ssp
591} 508}
592 509
593# @FUNCTION: has_m64 510# @FUNCTION: has_m64
594# @DESCRIPTION: 511# @DESCRIPTION:
595# This doesn't test if the flag is accepted, it tests if the flag actually 512# This doesn't test if the flag is accepted, it tests if the flag actually
596# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 513# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
597# return code is 0, else the return code is 1. 514# return code is 0, else the return code is 1.
598has_m64() { 515has_m64() {
516 eqawarn "${FUNCNAME}: don't use this anymore"
517
599 # 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
600 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 519 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
601 # please dont replace this function with test_flag in some future 520 # please dont replace this function with test_flag in some future
602 # clean-up! 521 # clean-up!
603 522
609 rm -f "${temp}".c 528 rm -f "${temp}".c
610 [[ ${ret} != 1 ]] && return 0 529 [[ ${ret} != 1 ]] && return 0
611 return 1 530 return 1
612} 531}
613 532
614# @FUNCTION: has_m32
615# @DESCRIPTION:
616# This doesn't test if the flag is accepted, it tests if the flag actually
617# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
618# code is 0, else return code is 1.
619has_m32() { 533has_m32() {
620 # this doesnt test if the flag is accepted, it tests if the flag 534 die "${FUNCNAME}: don't use this anymore"
621 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
622 # please dont replace this function with test_flag in some future
623 # clean-up!
624
625 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
626
627 local temp=$(emktemp)
628 echo "int main() { return(0); }" > "${temp}".c
629 MY_CC=$(tc-getCC)
630 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
631 local ret=$?
632 rm -f "${temp}".c
633 [[ ${ret} != 1 ]] && return 0
634 return 1
635} 535}
636 536
637# @FUNCTION: replace-sparc64-flags 537# @FUNCTION: replace-sparc64-flags
638# @DESCRIPTION: 538# @DESCRIPTION:
639# 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.
661 fi 561 fi
662 562
663 export CFLAGS CXXFLAGS 563 export CFLAGS CXXFLAGS
664} 564}
665 565
666# @FUNCTION: append-ldflags 566# @FUNCTION: append-libs
667# @USAGE: <flags> 567# @USAGE: <libs>
668# @DESCRIPTION: 568# @DESCRIPTION:
669# Add extra <flags> to the current LDFLAGS. 569# Add extra <libs> to the current LIBS.
670append-ldflags() { 570append-libs() {
671 [[ -z $* ]] && return 0 571 [[ $# -eq 0 ]] && return 0
672 local flag 572 local flag
673 for flag in "$@"; do 573 for flag in "$@"; do
674 [[ ${flag} == -l* ]] && \ 574 [[ ${flag} == -l* ]] && flag=${flag#-l}
675 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 575 export LIBS="${LIBS} -l${flag}"
676 done 576 done
677 577
678 export LDFLAGS="${LDFLAGS} $*"
679 return 0
680}
681
682# @FUNCTION: filter-ldflags
683# @USAGE: <flags>
684# @DESCRIPTION:
685# Remove particular <flags> from LDFLAGS. Accepts shell globs.
686filter-ldflags() {
687 _filter-var LDFLAGS "$@"
688 return 0 578 return 0
689} 579}
690 580
691# @FUNCTION: raw-ldflags 581# @FUNCTION: raw-ldflags
692# @USAGE: <flags> 582# @USAGE: [flags]
693# @DESCRIPTION: 583# @DESCRIPTION:
694# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 584# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
695# 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
696# 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 ${LDFLAGS}.
697raw-ldflags() { 589raw-ldflags() {
698 local x input="$@" 590 local x input="$@"
699 [[ -z ${input} ]] && input=${LDFLAGS} 591 [[ -z ${input} ]] && input=${LDFLAGS}
700 set -- 592 set --
701 for x in ${input} ; do 593 for x in ${input} ; do
703 set -- "$@" ${x//,/ } 595 set -- "$@" ${x//,/ }
704 done 596 done
705 echo "$@" 597 echo "$@"
706} 598}
707 599
708# @FUNCTION: bindnow-flags 600# @FUNCTION: no-as-needed
709# @RETURN: Returns the flags to enable "now" binding in the current selected linker. 601# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
710# @DESCRIPTION: 602no-as-needed() {
711# DEPRECATED - Gets the flags needed for "NOW" binding 603 case $($(tc-getLD) -v 2>&1 </dev/null) in
712bindnow-flags() { 604 *GNU*) # GNU ld
713 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" 605 echo "-Wl,--no-as-needed" ;;
606 esac
714} 607}
715 608
716 609fi
717# Some tests for when we screw with things and want to make
718# sure we didn't break anything
719#TESTS() {
720# CFLAGS="-a -b -c=1"
721# CXXFLAGS="-x -y -z=2"
722# LDFLAGS="-l -m -n=3"
723#
724# die() { exit 1; }
725# (is-flag 1 2 3) && die
726# (is-ldflag 1 2 3) && die
727#
728# is-flagq -l && die
729# is-ldflagq -a && die
730# is-flagq -a || die
731# is-flagq -x || die
732# is-ldflagq -n=* || die
733# is-ldflagq -n && die
734#
735# strip-unsupported-flags
736# [[ ${CFLAGS} == "-c=1" ]] || die
737# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
738#
739# echo "All tests pass"
740#}
741#TESTS

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