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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 1.132 2009/01/21 00:42:20 gengor Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.175 2012/06/05 02:16:40 dirtyepic 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 -mfloat-abi=* \
54 -msecure-plt -m*-toc -D* -U*" 49 -D* -U*"
55 50
56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 51 # 4.5
57 # NOTE: currently -Os have issues with gcc3 and K6* arch's 52 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 53 # 4.6
54 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
55 # 4.7
56 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
57
58 export ALLOWED_FLAGS
59 return 0 59 return 0
60} 60}
61 61
62# inverted filters for hardened compiler. This is trying to unpick 62# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults. 63# the hardened compiler defaults.
86 86
87# Remove occurrences of strings from variable given in $1 87# Remove occurrences of strings from variable given in $1
88# Strings removed are matched as globs, so for example 88# Strings removed are matched as globs, so for example
89# '-O*' would remove -O1, -O2 etc. 89# '-O*' would remove -O1, -O2 etc.
90_filter-var() { 90_filter-var() {
91 local f x VAR VAL 91 local f x var=$1 new=()
92 declare -a new
93
94 VAR=$1
95 shift 92 shift
96 eval VAL=\${${VAR}} 93
97 for f in ${VAL}; do 94 for f in ${!var} ; do
98 for x in "$@"; do 95 for x in "$@" ; do
99 # Note this should work with globs like -O* 96 # Note this should work with globs like -O*
100 [[ ${f} == ${x} ]] && continue 2 97 [[ ${f} == ${x} ]] && continue 2
101 done 98 done
102 eval new\[\${\#new\[@]}]=\${f} 99 new+=( "${f}" )
103 done 100 done
104 eval export ${VAR}=\${new\[*]} 101 eval export ${var}=\""${new[*]}"\"
105} 102}
106 103
107# @FUNCTION: filter-flags 104# @FUNCTION: filter-flags
108# @USAGE: <flags> 105# @USAGE: <flags>
109# @DESCRIPTION: 106# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs. 107# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
111filter-flags() { 108filter-flags() {
112 _filter-hardened "$@" 109 _filter-hardened "$@"
110 local v
111 for v in $(all-flag-vars) ; do
113 _filter-var CFLAGS "$@" 112 _filter-var ${v} "$@"
114 _filter-var CPPFLAGS "$@" 113 done
115 _filter-var CXXFLAGS "$@"
116 _filter-var FFLAGS "$@"
117 _filter-var FCFLAGS "$@"
118 return 0 114 return 0
119} 115}
120 116
121# @FUNCTION: filter-lfs-flags 117# @FUNCTION: filter-lfs-flags
122# @DESCRIPTION: 118# @DESCRIPTION:
123# Remove flags that enable Large File Support. 119# Remove flags that enable Large File Support.
124filter-lfs-flags() { 120filter-lfs-flags() {
125 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 121 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
122 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
123 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
124 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
125 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127}
128
129# @FUNCTION: filter-ldflags
130# @USAGE: <flags>
131# @DESCRIPTION:
132# Remove particular <flags> from LDFLAGS. Accepts shell globs.
133filter-ldflags() {
134 _filter-var LDFLAGS "$@"
135 return 0
127} 136}
128 137
129# @FUNCTION: append-cppflags 138# @FUNCTION: append-cppflags
130# @USAGE: <flags> 139# @USAGE: <flags>
131# @DESCRIPTION: 140# @DESCRIPTION:
132# Add extra <flags> to the current CPPFLAGS. 141# Add extra <flags> to the current CPPFLAGS.
133append-cppflags() { 142append-cppflags() {
134 [[ -z $* ]] && return 0 143 [[ $# -eq 0 ]] && return 0
135 export CPPFLAGS="${CPPFLAGS} $*" 144 export CPPFLAGS="${CPPFLAGS} $*"
145 return 0
146}
147
148# @FUNCTION: append-cflags
149# @USAGE: <flags>
150# @DESCRIPTION:
151# Add extra <flags> to the current CFLAGS.
152append-cflags() {
153 [[ $# -eq 0 ]] && return 0
154 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
136 return 0 155 return 0
137} 156}
138 157
139# @FUNCTION: append-cxxflags 158# @FUNCTION: append-cxxflags
140# @USAGE: <flags> 159# @USAGE: <flags>
141# @DESCRIPTION: 160# @DESCRIPTION:
142# Add extra <flags> to the current CXXFLAGS. 161# Add extra <flags> to the current CXXFLAGS.
143append-cxxflags() { 162append-cxxflags() {
144 [[ -z $* ]] && return 0 163 [[ $# -eq 0 ]] && return 0
145 export CXXFLAGS="${CXXFLAGS} $*" 164 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
146 return 0 165 return 0
147} 166}
148 167
149# @FUNCTION: append-fflags 168# @FUNCTION: append-fflags
150# @USAGE: <flags> 169# @USAGE: <flags>
151# @DESCRIPTION: 170# @DESCRIPTION:
152# Add extra <flags> to the current {F,FC}FLAGS. 171# Add extra <flags> to the current {F,FC}FLAGS.
153append-fflags() { 172append-fflags() {
154 [[ -z $* ]] && return 0 173 [[ $# -eq 0 ]] && return 0
155 export FFLAGS="${FFLAGS} $*" 174 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
156 export FCFLAGS="${FCFLAGS} $*" 175 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
157 return 0 176 return 0
158} 177}
159 178
160# @FUNCTION: append-lfs-flags 179# @FUNCTION: append-lfs-flags
161# @DESCRIPTION: 180# @DESCRIPTION:
162# Add flags that enable Large File Support. 181# Add flags that enable Large File Support.
163append-lfs-flags() { 182append-lfs-flags() {
164 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 183 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
184 # see comments in filter-lfs-flags func for meaning of these
165 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 185 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
186}
187
188# @FUNCTION: append-ldflags
189# @USAGE: <flags>
190# @DESCRIPTION:
191# Add extra <flags> to the current LDFLAGS.
192append-ldflags() {
193 [[ $# -eq 0 ]] && return 0
194 local flag
195 for flag in "$@"; do
196 [[ ${flag} == -l* ]] && \
197 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
198 done
199
200 export LDFLAGS="${LDFLAGS} $*"
201 return 0
166} 202}
167 203
168# @FUNCTION: append-flags 204# @FUNCTION: append-flags
169# @USAGE: <flags> 205# @USAGE: <flags>
170# @DESCRIPTION: 206# @DESCRIPTION:
171# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 207# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
172append-flags() { 208append-flags() {
173 [[ -z $* ]] && return 0 209 [[ $# -eq 0 ]] && return 0
174 export CFLAGS="${CFLAGS} $*" 210 case " $* " in
175 export CXXFLAGS="${CXXFLAGS} $*" 211 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
176 export FFLAGS="${FFLAGS} $*" 212 *' '-L*|\
177 export FCFLAGS="${FCFLAGS} $*" 213 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
214 esac
215 append-cflags "$@"
216 append-cxxflags "$@"
217 append-fflags "$@"
178 return 0 218 return 0
179} 219}
180 220
181# @FUNCTION: replace-flags 221# @FUNCTION: replace-flags
182# @USAGE: <old> <new> 222# @USAGE: <old> <new>
183# @DESCRIPTION: 223# @DESCRIPTION:
184# Replace the <old> flag with <new>. Accepts shell globs for <old>. 224# Replace the <old> flag with <new>. Accepts shell globs for <old>.
185replace-flags() { 225replace-flags() {
186 [[ $# != 2 ]] \
187 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 226 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
188 && die "replace-flags takes 2 arguments, not $#"
189 227
190 local f fset 228 local f var new
191 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS 229 for var in $(all-flag-vars) ; do
192
193 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
194 # Looping over the flags instead of using a global 230 # Looping over the flags instead of using a global
195 # substitution ensures that we're working with flag atoms. 231 # substitution ensures that we're working with flag atoms.
196 # Otherwise globs like -O* have the potential to wipe out the 232 # Otherwise globs like -O* have the potential to wipe out the
197 # list of flags. 233 # list of flags.
234 new=()
198 for f in ${!fset}; do 235 for f in ${!var} ; do
199 # Note this should work with globs like -O* 236 # Note this should work with globs like -O*
200 [[ ${f} == ${1} ]] && f=${2} 237 [[ ${f} == ${1} ]] && f=${2}
201 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 238 new+=( "${f}" )
202 done 239 done
203 eval export ${fset}=\${new_${fset}\[*]} 240 eval export ${var}=\""${new[*]}"\"
204 done 241 done
205 242
206 return 0 243 return 0
207} 244}
208 245
236# @USAGE: <flag> 273# @USAGE: <flag>
237# @DESCRIPTION: 274# @DESCRIPTION:
238# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. 275# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
239is-flagq() { 276is-flagq() {
240 [[ -n $2 ]] && die "Usage: is-flag <flag>" 277 [[ -n $2 ]] && die "Usage: is-flag <flag>"
241 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1 278
279 local var
280 for var in $(all-flag-vars) ; do
281 _is_flagq ${var} "$1" && return 0
282 done
283 return 1
242} 284}
243 285
244# @FUNCTION: is-flag 286# @FUNCTION: is-flag
245# @USAGE: <flag> 287# @USAGE: <flag>
246# @DESCRIPTION: 288# @DESCRIPTION:
302 344
303# @FUNCTION: strip-flags 345# @FUNCTION: strip-flags
304# @DESCRIPTION: 346# @DESCRIPTION:
305# Strip C[XX]FLAGS of everything except known good/safe flags. 347# Strip C[XX]FLAGS of everything except known good/safe flags.
306strip-flags() { 348strip-flags() {
307 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS 349 local x y var
308 350
309 setup-allowed-flags 351 setup-allowed-flags
310 352
311 local NEW_CFLAGS=""
312 local NEW_CXXFLAGS=""
313 local NEW_FFLAGS=""
314 local NEW_FCFLAGS=""
315
316 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
317 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
318 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
319 fi
320
321 set -f # disable pathname expansion 353 set -f # disable pathname expansion
322 354
323 for x in ${CFLAGS}; do 355 for var in $(all-flag-vars) ; do
356 local new=()
357
358 for x in ${!var} ; do
359 local flag=${x%%=*}
324 for y in ${ALLOWED_FLAGS}; do 360 for y in ${ALLOWED_FLAGS} ; do
325 flag=${x%%=*}
326 if [ "${flag%%${y}}" = "" ] ; then 361 if [[ -z ${flag%%${y}} ]] ; then
327 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 362 new+=( "${x}" )
328 break 363 break
329 fi 364 fi
330 done 365 done
331 done 366 done
332 367
333 for x in ${CXXFLAGS}; do
334 for y in ${ALLOWED_FLAGS}; do
335 flag=${x%%=*}
336 if [ "${flag%%${y}}" = "" ] ; then
337 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
338 break
339 fi
340 done
341 done
342
343 for x in ${FFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
353 for x in ${FCFLAGS}; do
354 for y in ${ALLOWED_FLAGS}; do
355 flag=${x%%=*}
356 if [ "${flag%%${y}}" = "" ] ; then
357 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
358 break
359 fi
360 done
361 done
362
363 # In case we filtered out all optimization flags fallback to -O2 368 # In case we filtered out all optimization flags fallback to -O2
364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 369 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
365 NEW_CFLAGS="${NEW_CFLAGS} -O2" 370 new+=( -O2 )
366 fi 371 fi
367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 372
368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 373 eval export ${var}=\""${new[*]}"\"
369 fi 374 done
370 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
371 NEW_FFLAGS="${NEW_FFLAGS} -O2"
372 fi
373 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
375 fi
376 375
377 set +f # re-enable pathname expansion 376 set +f # re-enable pathname expansion
378 377
379 export CFLAGS="${NEW_CFLAGS}"
380 export CXXFLAGS="${NEW_CXXFLAGS}"
381 export FFLAGS="${NEW_FFLAGS}"
382 export FCFLAGS="${NEW_FCFLAGS}"
383 return 0 378 return 0
384} 379}
385 380
386test-flag-PROG() { 381test-flag-PROG() {
387 local comp=$1 382 local comp=$1
388 local flags="$2" 383 local flag=$2
389 384
390 [[ -z ${comp} || -z ${flags} ]] && \ 385 [[ -z ${comp} || -z ${flag} ]] && return 1
391 return 1
392 386
387 # use -c so we can test the assembler as well
393 local PROG=$(tc-get${comp}) 388 local PROG=$(tc-get${comp})
394 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 389 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
395 > /dev/null 2>&1 390 > /dev/null 2>&1
396} 391}
397 392
398# @FUNCTION: test-flag-CC 393# @FUNCTION: test-flag-CC
399# @USAGE: <flag> 394# @USAGE: <flag>
426 421
427 shift 422 shift
428 423
429 [[ -z ${comp} ]] && return 1 424 [[ -z ${comp} ]] && return 1
430 425
431 x=""
432 for x in "$@" ; do 426 for x in "$@" ; do
433 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 427 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
434 done 428 done
435 429
436 echo "${flags}" 430 echo "${flags}"
467# @USAGE: <flags> 461# @USAGE: <flags>
468# @DESCRIPTION: 462# @DESCRIPTION:
469# Short-hand that should hopefully work for both C and C++ compiler, but 463# Short-hand that should hopefully work for both C and C++ compiler, but
470# its really only present due to the append-flags() abomination. 464# its really only present due to the append-flags() abomination.
471test-flags() { test-flags-CC "$@"; } 465test-flags() { test-flags-CC "$@"; }
472
473# @FUNCTION: test_flag
474# @DESCRIPTION:
475# DEPRICIATED, use test-flags()
476test_flag() {
477 ewarn "test_flag: deprecated, please use test-flags()!" >&2
478
479 test-flags-CC "$@"
480}
481 466
482# @FUNCTION: test_version_info 467# @FUNCTION: test_version_info
483# @USAGE: <version> 468# @USAGE: <version>
484# @DESCRIPTION: 469# @DESCRIPTION:
485# Returns shell true if the current C compiler version matches <version>, else returns shell false. 470# Returns shell true if the current C compiler version matches <version>, else returns shell false.
505# @FUNCTION: get-flag 490# @FUNCTION: get-flag
506# @USAGE: <flag> 491# @USAGE: <flag>
507# @DESCRIPTION: 492# @DESCRIPTION:
508# Find and echo the value for a particular flag. Accepts shell globs. 493# Find and echo the value for a particular flag. Accepts shell globs.
509get-flag() { 494get-flag() {
510 local f findflag="$1" 495 local f var findflag="$1"
511 496
512 # this code looks a little flaky but seems to work for 497 # this code looks a little flaky but seems to work for
513 # everything we want ... 498 # everything we want ...
514 # for example, if CFLAGS="-march=i686": 499 # for example, if CFLAGS="-march=i686":
515 # `get-flag -march` == "-march=i686" 500 # `get-flag -march` == "-march=i686"
516 # `get-flag march` == "i686" 501 # `get-flag march` == "i686"
517 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do 502 for var in $(all-flag-vars) ; do
503 for f in ${!var} ; do
518 if [ "${f/${findflag}}" != "${f}" ] ; then 504 if [ "${f/${findflag}}" != "${f}" ] ; then
519 printf "%s\n" "${f/-${findflag}=}" 505 printf "%s\n" "${f/-${findflag}=}"
520 return 0 506 return 0
521 fi 507 fi
508 done
522 done 509 done
523 return 1 510 return 1
524}
525
526# @FUNCTION: has_hardened
527# @DESCRIPTION:
528# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
529has_hardened() {
530 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
531
532 test_version_info Hardened && return 0
533 # The specs file wont exist unless gcc has GCC_SPECS support
534 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
535}
536
537# @FUNCTION: has_pic
538# @DESCRIPTION:
539# DEPRECATED - use gcc-specs-pie from toolchain-funcs
540# indicate whether PIC is set
541has_pic() {
542 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
543
544 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
545 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
546 gcc-specs-pie
547}
548
549# @FUNCTION: has_pie
550# @DESCRIPTION:
551# DEPRECATED - use gcc-specs-pie from toolchain-funcs
552# indicate whether PIE is set
553has_pie() {
554 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
555
556 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
557 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
558 gcc-specs-pie
559}
560
561# @FUNCTION: has_ssp_all
562# @DESCRIPTION:
563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
564# indicate whether code for SSP is being generated for all functions
565has_ssp_all() {
566 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
567
568 # note; this matches only -fstack-protector-all
569 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
571 gcc-specs-ssp-to-all
572}
573
574# @FUNCTION: has_ssp
575# @DESCRIPTION:
576# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
577# indicate whether code for SSP is being generated
578has_ssp() {
579 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
580
581 # note; this matches both -fstack-protector and -fstack-protector-all
582 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
583 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
584 gcc-specs-ssp
585} 511}
586 512
587# @FUNCTION: has_m64 513# @FUNCTION: has_m64
588# @DESCRIPTION: 514# @DESCRIPTION:
589# This doesn't test if the flag is accepted, it tests if the flag actually 515# This doesn't test if the flag is accepted, it tests if the flag actually
590# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 516# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
591# return code is 0, else the return code is 1. 517# return code is 0, else the return code is 1.
592has_m64() { 518has_m64() {
519 eqawarn "${FUNCNAME}: don't use this anymore"
520
593 # this doesnt test if the flag is accepted, it tests if the flag 521 # this doesnt test if the flag is accepted, it tests if the flag
594 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 522 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
595 # please dont replace this function with test_flag in some future 523 # please dont replace this function with test_flag in some future
596 # clean-up! 524 # clean-up!
597 525
603 rm -f "${temp}".c 531 rm -f "${temp}".c
604 [[ ${ret} != 1 ]] && return 0 532 [[ ${ret} != 1 ]] && return 0
605 return 1 533 return 1
606} 534}
607 535
608# @FUNCTION: has_m32
609# @DESCRIPTION:
610# This doesn't test if the flag is accepted, it tests if the flag actually
611# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
612# code is 0, else return code is 1.
613has_m32() { 536has_m32() {
614 # this doesnt test if the flag is accepted, it tests if the flag 537 die "${FUNCNAME}: don't use this anymore"
615 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
616 # please dont replace this function with test_flag in some future
617 # clean-up!
618
619 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
620
621 local temp=$(emktemp)
622 echo "int main() { return(0); }" > "${temp}".c
623 MY_CC=$(tc-getCC)
624 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
625 local ret=$?
626 rm -f "${temp}".c
627 [[ ${ret} != 1 ]] && return 0
628 return 1
629} 538}
630 539
631# @FUNCTION: replace-sparc64-flags 540# @FUNCTION: replace-sparc64-flags
632# @DESCRIPTION: 541# @DESCRIPTION:
633# Sets mcpu to v8 and uses the original value as mtune if none specified. 542# Sets mcpu to v8 and uses the original value as mtune if none specified.
655 fi 564 fi
656 565
657 export CFLAGS CXXFLAGS 566 export CFLAGS CXXFLAGS
658} 567}
659 568
660# @FUNCTION: append-ldflags 569# @FUNCTION: append-libs
661# @USAGE: <flags> 570# @USAGE: <libs>
662# @DESCRIPTION: 571# @DESCRIPTION:
663# Add extra <flags> to the current LDFLAGS. 572# Add extra <libs> to the current LIBS.
664append-ldflags() { 573append-libs() {
665 [[ -z $* ]] && return 0 574 [[ $# -eq 0 ]] && return 0
666 local flag 575 local flag
667 for flag in "$@"; do 576 for flag in "$@"; do
668 [[ ${flag} == -l* ]] && \ 577 [[ ${flag} == -l* ]] && flag=${flag#-l}
669 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 578 export LIBS="${LIBS} -l${flag}"
670 done 579 done
671 580
672 export LDFLAGS="${LDFLAGS} $*"
673 return 0
674}
675
676# @FUNCTION: filter-ldflags
677# @USAGE: <flags>
678# @DESCRIPTION:
679# Remove particular <flags> from LDFLAGS. Accepts shell globs.
680filter-ldflags() {
681 _filter-var LDFLAGS "$@"
682 return 0 581 return 0
683} 582}
684 583
685# @FUNCTION: raw-ldflags 584# @FUNCTION: raw-ldflags
686# @USAGE: <flags> 585# @USAGE: [flags]
687# @DESCRIPTION: 586# @DESCRIPTION:
688# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 587# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
689# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 588# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
690# to gcc where it needs the '-Wl,'. 589# to gcc where it needs the '-Wl,'.
590#
591# If no flags are specified, then default to ${LDFLAGS}.
691raw-ldflags() { 592raw-ldflags() {
692 local x input="$@" 593 local x input="$@"
693 [[ -z ${input} ]] && input=${LDFLAGS} 594 [[ -z ${input} ]] && input=${LDFLAGS}
694 set -- 595 set --
695 for x in ${input} ; do 596 for x in ${input} ; do
697 set -- "$@" ${x//,/ } 598 set -- "$@" ${x//,/ }
698 done 599 done
699 echo "$@" 600 echo "$@"
700} 601}
701 602
702# @FUNCTION: bindnow-flags 603# @FUNCTION: no-as-needed
703# @RETURN: Returns the flags to enable "now" binding in the current selected linker. 604# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
704# @DESCRIPTION: 605no-as-needed() {
705# DEPRECATED - Gets the flags needed for "NOW" binding 606 case $($(tc-getLD) -v 2>&1 </dev/null) in
706bindnow-flags() { 607 *GNU*) # GNU ld
707 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" 608 echo "-Wl,--no-as-needed" ;;
609 esac
708} 610}
709 611
710 612fi
711# Some tests for when we screw with things and want to make
712# sure we didn't break anything
713#TESTS() {
714# CFLAGS="-a -b -c=1"
715# CXXFLAGS="-x -y -z=2"
716# LDFLAGS="-l -m -n=3"
717#
718# die() { exit 1; }
719# (is-flag 1 2 3) && die
720# (is-ldflag 1 2 3) && die
721#
722# is-flagq -l && die
723# is-ldflagq -a && die
724# is-flagq -a || die
725# is-flagq -x || die
726# is-ldflagq -n=* || die
727# is-ldflagq -n && die
728#
729# strip-unsupported-flags
730# [[ ${CFLAGS} == "-c=1" ]] || die
731# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
732#
733# echo "All tests pass"
734#}
735#TESTS

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