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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 1.146 2010/02/17 18:20:49 ssuominen 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="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer" 37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${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 \ 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 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 50 # 4.5
59 # NOTE: currently -Os have issues with gcc3 and K6* arch's 51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 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
61 return 0 56 return 0
62} 57}
63 58
64# inverted filters for hardened compiler. This is trying to unpick 59# inverted filters for hardened compiler. This is trying to unpick
65# the hardened compiler defaults. 60# the hardened compiler defaults.
88 83
89# Remove occurrences of strings from variable given in $1 84# Remove occurrences of strings from variable given in $1
90# Strings removed are matched as globs, so for example 85# Strings removed are matched as globs, so for example
91# '-O*' would remove -O1, -O2 etc. 86# '-O*' would remove -O1, -O2 etc.
92_filter-var() { 87_filter-var() {
93 local f x VAR VAL 88 local f x var=$1 new=()
94 declare -a new
95
96 VAR=$1
97 shift 89 shift
98 eval VAL=\${${VAR}} 90
99 for f in ${VAL}; do 91 for f in ${!var} ; do
100 for x in "$@"; do 92 for x in "$@" ; do
101 # Note this should work with globs like -O* 93 # Note this should work with globs like -O*
102 [[ ${f} == ${x} ]] && continue 2 94 [[ ${f} == ${x} ]] && continue 2
103 done 95 done
104 eval new\[\${\#new\[@]}]=\${f} 96 new+=( "${f}" )
105 done 97 done
106 eval export ${VAR}=\${new\[*]} 98 eval export ${var}=\""${new[*]}"\"
107} 99}
108 100
109# @FUNCTION: filter-flags 101# @FUNCTION: filter-flags
110# @USAGE: <flags> 102# @USAGE: <flags>
111# @DESCRIPTION: 103# @DESCRIPTION:
112# 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.
113filter-flags() { 105filter-flags() {
114 _filter-hardened "$@" 106 _filter-hardened "$@"
107 local v
108 for v in $(all-flag-vars) ; do
115 _filter-var CFLAGS "$@" 109 _filter-var ${v} "$@"
116 _filter-var CPPFLAGS "$@" 110 done
117 _filter-var CXXFLAGS "$@"
118 _filter-var FFLAGS "$@"
119 _filter-var FCFLAGS "$@"
120 return 0 111 return 0
121} 112}
122 113
123# @FUNCTION: filter-lfs-flags 114# @FUNCTION: filter-lfs-flags
124# @DESCRIPTION: 115# @DESCRIPTION:
125# Remove flags that enable Large File Support. 116# Remove flags that enable Large File Support.
126filter-lfs-flags() { 117filter-lfs-flags() {
127 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
128 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
124}
125
126# @FUNCTION: filter-ldflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Remove particular <flags> from LDFLAGS. Accepts shell globs.
130filter-ldflags() {
131 _filter-var LDFLAGS "$@"
132 return 0
129} 133}
130 134
131# @FUNCTION: append-cppflags 135# @FUNCTION: append-cppflags
132# @USAGE: <flags> 136# @USAGE: <flags>
133# @DESCRIPTION: 137# @DESCRIPTION:
134# Add extra <flags> to the current CPPFLAGS. 138# Add extra <flags> to the current CPPFLAGS.
135append-cppflags() { 139append-cppflags() {
136 [[ -z $* ]] && return 0 140 [[ $# -eq 0 ]] && return 0
137 export CPPFLAGS="${CPPFLAGS} $*" 141 export CPPFLAGS="${CPPFLAGS} $*"
138 return 0 142 return 0
139} 143}
140 144
141# @FUNCTION: append-cflags 145# @FUNCTION: append-cflags
142# @USAGE: <flags> 146# @USAGE: <flags>
143# @DESCRIPTION: 147# @DESCRIPTION:
144# Add extra <flags> to the current CFLAGS. 148# Add extra <flags> to the current CFLAGS.
145append-cflags() { 149append-cflags() {
146 [[ -z $* ]] && return 0 150 [[ $# -eq 0 ]] && return 0
147 export CFLAGS="${CFLAGS} $*" 151 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
148 return 0 152 return 0
149} 153}
150 154
151# @FUNCTION: append-cxxflags 155# @FUNCTION: append-cxxflags
152# @USAGE: <flags> 156# @USAGE: <flags>
153# @DESCRIPTION: 157# @DESCRIPTION:
154# Add extra <flags> to the current CXXFLAGS. 158# Add extra <flags> to the current CXXFLAGS.
155append-cxxflags() { 159append-cxxflags() {
156 [[ -z $* ]] && return 0 160 [[ $# -eq 0 ]] && return 0
157 export CXXFLAGS="${CXXFLAGS} $*" 161 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
158 return 0 162 return 0
159} 163}
160 164
161# @FUNCTION: append-fflags 165# @FUNCTION: append-fflags
162# @USAGE: <flags> 166# @USAGE: <flags>
163# @DESCRIPTION: 167# @DESCRIPTION:
164# Add extra <flags> to the current {F,FC}FLAGS. 168# Add extra <flags> to the current {F,FC}FLAGS.
165append-fflags() { 169append-fflags() {
166 [[ -z $* ]] && return 0 170 [[ $# -eq 0 ]] && return 0
167 export FFLAGS="${FFLAGS} $*" 171 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
168 export FCFLAGS="${FCFLAGS} $*" 172 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
169 return 0 173 return 0
170} 174}
171 175
172# @FUNCTION: append-lfs-flags 176# @FUNCTION: append-lfs-flags
173# @DESCRIPTION: 177# @DESCRIPTION:
174# Add flags that enable Large File Support. 178# Add flags that enable Large File Support.
175append-lfs-flags() { 179append-lfs-flags() {
176 [[ -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
177 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
178} 199}
179 200
180# @FUNCTION: append-flags 201# @FUNCTION: append-flags
181# @USAGE: <flags> 202# @USAGE: <flags>
182# @DESCRIPTION: 203# @DESCRIPTION:
183# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 204# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
184append-flags() { 205append-flags() {
185 [[ -z $* ]] && return 0 206 [[ $# -eq 0 ]] && return 0
207 case " $* " in
208 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
209 *' '-L*|\
210 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
211 esac
186 append-cflags "$@" 212 append-cflags "$@"
187 append-cxxflags "$@" 213 append-cxxflags "$@"
188 append-fflags "$@" 214 append-fflags "$@"
189 return 0 215 return 0
190} 216}
192# @FUNCTION: replace-flags 218# @FUNCTION: replace-flags
193# @USAGE: <old> <new> 219# @USAGE: <old> <new>
194# @DESCRIPTION: 220# @DESCRIPTION:
195# Replace the <old> flag with <new>. Accepts shell globs for <old>. 221# Replace the <old> flag with <new>. Accepts shell globs for <old>.
196replace-flags() { 222replace-flags() {
197 [[ $# != 2 ]] \
198 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 223 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
199 && die "replace-flags takes 2 arguments, not $#"
200 224
201 local f fset 225 local f var new
202 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS 226 for var in $(all-flag-vars) ; do
203
204 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
205 # Looping over the flags instead of using a global 227 # Looping over the flags instead of using a global
206 # substitution ensures that we're working with flag atoms. 228 # substitution ensures that we're working with flag atoms.
207 # Otherwise globs like -O* have the potential to wipe out the 229 # Otherwise globs like -O* have the potential to wipe out the
208 # list of flags. 230 # list of flags.
231 new=()
209 for f in ${!fset}; do 232 for f in ${!var} ; do
210 # Note this should work with globs like -O* 233 # Note this should work with globs like -O*
211 [[ ${f} == ${1} ]] && f=${2} 234 [[ ${f} == ${1} ]] && f=${2}
212 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 235 new+=( "${f}" )
213 done 236 done
214 eval export ${fset}=\${new_${fset}\[*]} 237 eval export ${var}=\""${new[*]}"\"
215 done 238 done
216 239
217 return 0 240 return 0
218} 241}
219 242
247# @USAGE: <flag> 270# @USAGE: <flag>
248# @DESCRIPTION: 271# @DESCRIPTION:
249# 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.
250is-flagq() { 273is-flagq() {
251 [[ -n $2 ]] && die "Usage: is-flag <flag>" 274 [[ -n $2 ]] && die "Usage: is-flag <flag>"
252 _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} "$1" && return 0
279 done
280 return 1
253} 281}
254 282
255# @FUNCTION: is-flag 283# @FUNCTION: is-flag
256# @USAGE: <flag> 284# @USAGE: <flag>
257# @DESCRIPTION: 285# @DESCRIPTION:
313 341
314# @FUNCTION: strip-flags 342# @FUNCTION: strip-flags
315# @DESCRIPTION: 343# @DESCRIPTION:
316# Strip C[XX]FLAGS of everything except known good/safe flags. 344# Strip C[XX]FLAGS of everything except known good/safe flags.
317strip-flags() { 345strip-flags() {
318 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS 346 local x y var
319 347
320 setup-allowed-flags 348 setup-allowed-flags
321 349
322 local NEW_CFLAGS=""
323 local NEW_CXXFLAGS=""
324 local NEW_FFLAGS=""
325 local NEW_FCFLAGS=""
326
327 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
328 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
329 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
330 fi
331
332 set -f # disable pathname expansion 350 set -f # disable pathname expansion
333 351
334 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%%=*}
335 for y in ${ALLOWED_FLAGS}; do 357 for y in ${ALLOWED_FLAGS} ; do
336 flag=${x%%=*}
337 if [ "${flag%%${y}}" = "" ] ; then 358 if [[ -z ${flag%%${y}} ]] ; then
338 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 359 new+=( "${x}" )
339 break 360 break
340 fi 361 fi
341 done 362 done
342 done 363 done
343 364
344 for x in ${CXXFLAGS}; do
345 for y in ${ALLOWED_FLAGS}; do
346 flag=${x%%=*}
347 if [ "${flag%%${y}}" = "" ] ; then
348 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
349 break
350 fi
351 done
352 done
353
354 for x in ${FFLAGS}; do
355 for y in ${ALLOWED_FLAGS}; do
356 flag=${x%%=*}
357 if [ "${flag%%${y}}" = "" ] ; then
358 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
359 break
360 fi
361 done
362 done
363
364 for x in ${FCFLAGS}; do
365 for y in ${ALLOWED_FLAGS}; do
366 flag=${x%%=*}
367 if [ "${flag%%${y}}" = "" ] ; then
368 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
369 break
370 fi
371 done
372 done
373
374 # In case we filtered out all optimization flags fallback to -O2 365 # In case we filtered out all optimization flags fallback to -O2
375 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 366 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
376 NEW_CFLAGS="${NEW_CFLAGS} -O2" 367 new+=( -O2 )
377 fi 368 fi
378 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 369
379 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 370 eval export ${var}=\""${new[*]}"\"
380 fi 371 done
381 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
382 NEW_FFLAGS="${NEW_FFLAGS} -O2"
383 fi
384 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
385 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
386 fi
387 372
388 set +f # re-enable pathname expansion 373 set +f # re-enable pathname expansion
389 374
390 export CFLAGS="${NEW_CFLAGS}"
391 export CXXFLAGS="${NEW_CXXFLAGS}"
392 export FFLAGS="${NEW_FFLAGS}"
393 export FCFLAGS="${NEW_FCFLAGS}"
394 return 0 375 return 0
395} 376}
396 377
397test-flag-PROG() { 378test-flag-PROG() {
398 local comp=$1 379 local comp=$1
399 local flags="$2" 380 local flag=$2
400 381
401 [[ -z ${comp} || -z ${flags} ]] && \ 382 [[ -z ${comp} || -z ${flag} ]] && return 1
402 return 1
403 383
384 # use -c so we can test the assembler as well
404 local PROG=$(tc-get${comp}) 385 local PROG=$(tc-get${comp})
405 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 386 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
406 > /dev/null 2>&1 387 > /dev/null 2>&1
407} 388}
408 389
409# @FUNCTION: test-flag-CC 390# @FUNCTION: test-flag-CC
410# @USAGE: <flag> 391# @USAGE: <flag>
437 418
438 shift 419 shift
439 420
440 [[ -z ${comp} ]] && return 1 421 [[ -z ${comp} ]] && return 1
441 422
442 x=""
443 for x in "$@" ; do 423 for x in "$@" ; do
444 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 424 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
445 done 425 done
446 426
447 echo "${flags}" 427 echo "${flags}"
478# @USAGE: <flags> 458# @USAGE: <flags>
479# @DESCRIPTION: 459# @DESCRIPTION:
480# Short-hand that should hopefully work for both C and C++ compiler, but 460# Short-hand that should hopefully work for both C and C++ compiler, but
481# its really only present due to the append-flags() abomination. 461# its really only present due to the append-flags() abomination.
482test-flags() { test-flags-CC "$@"; } 462test-flags() { test-flags-CC "$@"; }
483
484# @FUNCTION: test_flag
485# @DESCRIPTION:
486# DEPRICIATED, use test-flags()
487test_flag() {
488 ewarn "test_flag: deprecated, please use test-flags()!" >&2
489
490 test-flags-CC "$@"
491}
492 463
493# @FUNCTION: test_version_info 464# @FUNCTION: test_version_info
494# @USAGE: <version> 465# @USAGE: <version>
495# @DESCRIPTION: 466# @DESCRIPTION:
496# 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.
516# @FUNCTION: get-flag 487# @FUNCTION: get-flag
517# @USAGE: <flag> 488# @USAGE: <flag>
518# @DESCRIPTION: 489# @DESCRIPTION:
519# 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.
520get-flag() { 491get-flag() {
521 local f findflag="$1" 492 local f var findflag="$1"
522 493
523 # this code looks a little flaky but seems to work for 494 # this code looks a little flaky but seems to work for
524 # everything we want ... 495 # everything we want ...
525 # for example, if CFLAGS="-march=i686": 496 # for example, if CFLAGS="-march=i686":
526 # `get-flag -march` == "-march=i686" 497 # `get-flag -march` == "-march=i686"
527 # `get-flag march` == "i686" 498 # `get-flag march` == "i686"
528 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do 499 for var in $(all-flag-vars) ; do
500 for f in ${!var} ; do
529 if [ "${f/${findflag}}" != "${f}" ] ; then 501 if [ "${f/${findflag}}" != "${f}" ] ; then
530 printf "%s\n" "${f/-${findflag}=}" 502 printf "%s\n" "${f/-${findflag}=}"
531 return 0 503 return 0
532 fi 504 fi
505 done
533 done 506 done
534 return 1 507 return 1
535}
536
537# @FUNCTION: has_hardened
538# @DESCRIPTION:
539# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
540has_hardened() {
541 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
542
543 test_version_info Hardened && return 0
544 # The specs file wont exist unless gcc has GCC_SPECS support
545 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
546}
547
548# @FUNCTION: has_pic
549# @DESCRIPTION:
550# DEPRECATED - use gcc-specs-pie from toolchain-funcs
551# indicate whether PIC is set
552has_pic() {
553 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
554
555 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
556 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
557 gcc-specs-pie
558}
559
560# @FUNCTION: has_pie
561# @DESCRIPTION:
562# DEPRECATED - use gcc-specs-pie from toolchain-funcs
563# indicate whether PIE is set
564has_pie() {
565 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
566
567 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
568 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
569 gcc-specs-pie
570}
571
572# @FUNCTION: has_ssp_all
573# @DESCRIPTION:
574# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
575# indicate whether code for SSP is being generated for all functions
576has_ssp_all() {
577 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
578
579 # note; this matches only -fstack-protector-all
580 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
581 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
582 gcc-specs-ssp-to-all
583}
584
585# @FUNCTION: has_ssp
586# @DESCRIPTION:
587# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
588# indicate whether code for SSP is being generated
589has_ssp() {
590 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
591
592 # note; this matches both -fstack-protector and -fstack-protector-all
593 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
594 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
595 gcc-specs-ssp
596} 508}
597 509
598# @FUNCTION: has_m64 510# @FUNCTION: has_m64
599# @DESCRIPTION: 511# @DESCRIPTION:
600# This doesn't test if the flag is accepted, it tests if the flag actually 512# This doesn't test if the flag is accepted, it tests if the flag actually
601# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 513# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
602# return code is 0, else the return code is 1. 514# return code is 0, else the return code is 1.
603has_m64() { 515has_m64() {
516 eqawarn "${FUNCNAME}: don't use this anymore"
517
604 # 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
605 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 519 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
606 # please dont replace this function with test_flag in some future 520 # please dont replace this function with test_flag in some future
607 # clean-up! 521 # clean-up!
608 522
614 rm -f "${temp}".c 528 rm -f "${temp}".c
615 [[ ${ret} != 1 ]] && return 0 529 [[ ${ret} != 1 ]] && return 0
616 return 1 530 return 1
617} 531}
618 532
619# @FUNCTION: has_m32
620# @DESCRIPTION:
621# This doesn't test if the flag is accepted, it tests if the flag actually
622# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
623# code is 0, else return code is 1.
624has_m32() { 533has_m32() {
625 # this doesnt test if the flag is accepted, it tests if the flag 534 die "${FUNCNAME}: don't use this anymore"
626 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
627 # please dont replace this function with test_flag in some future
628 # clean-up!
629
630 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
631
632 local temp=$(emktemp)
633 echo "int main() { return(0); }" > "${temp}".c
634 MY_CC=$(tc-getCC)
635 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
636 local ret=$?
637 rm -f "${temp}".c
638 [[ ${ret} != 1 ]] && return 0
639 return 1
640} 535}
641 536
642# @FUNCTION: replace-sparc64-flags 537# @FUNCTION: replace-sparc64-flags
643# @DESCRIPTION: 538# @DESCRIPTION:
644# 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.
666 fi 561 fi
667 562
668 export CFLAGS CXXFLAGS 563 export CFLAGS CXXFLAGS
669} 564}
670 565
671# @FUNCTION: append-ldflags 566# @FUNCTION: append-libs
672# @USAGE: <flags> 567# @USAGE: <libs>
673# @DESCRIPTION: 568# @DESCRIPTION:
674# Add extra <flags> to the current LDFLAGS. 569# Add extra <libs> to the current LIBS.
675append-ldflags() { 570append-libs() {
676 [[ -z $* ]] && return 0 571 [[ $# -eq 0 ]] && return 0
677 local flag 572 local flag
678 for flag in "$@"; do 573 for flag in "$@"; do
679 [[ ${flag} == -l* ]] && \ 574 [[ ${flag} == -l* ]] && flag=${flag#-l}
680 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS" 575 export LIBS="${LIBS} -l${flag}"
681 done 576 done
682 577
683 export LDFLAGS="${LDFLAGS} $*"
684 return 0
685}
686
687# @FUNCTION: filter-ldflags
688# @USAGE: <flags>
689# @DESCRIPTION:
690# Remove particular <flags> from LDFLAGS. Accepts shell globs.
691filter-ldflags() {
692 _filter-var LDFLAGS "$@"
693 return 0 578 return 0
694} 579}
695 580
696# @FUNCTION: raw-ldflags 581# @FUNCTION: raw-ldflags
697# @USAGE: <flags> 582# @USAGE: [flags]
698# @DESCRIPTION: 583# @DESCRIPTION:
699# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 584# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
700# 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
701# 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 ${LDFLAGS}.
702raw-ldflags() { 589raw-ldflags() {
703 local x input="$@" 590 local x input="$@"
704 [[ -z ${input} ]] && input=${LDFLAGS} 591 [[ -z ${input} ]] && input=${LDFLAGS}
705 set -- 592 set --
706 for x in ${input} ; do 593 for x in ${input} ; do
717 *GNU*) # GNU ld 604 *GNU*) # GNU ld
718 echo "-Wl,--no-as-needed" ;; 605 echo "-Wl,--no-as-needed" ;;
719 esac 606 esac
720} 607}
721 608
722# Some tests for when we screw with things and want to make 609fi
723# sure we didn't break anything
724#TESTS() {
725# CFLAGS="-a -b -c=1"
726# CXXFLAGS="-x -y -z=2"
727# LDFLAGS="-l -m -n=3"
728#
729# die() { exit 1; }
730# (is-flag 1 2 3) && die
731# (is-ldflag 1 2 3) && die
732#
733# is-flagq -l && die
734# is-ldflagq -a && die
735# is-flagq -a || die
736# is-flagq -x || die
737# is-ldflagq -n=* || die
738# is-ldflagq -n && die
739#
740# strip-unsupported-flags
741# [[ ${CFLAGS} == "-c=1" ]] || die
742# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
743#
744# echo "All tests pass"
745#}
746#TESTS

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