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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 1.148 2010/05/08 03:47:41 dirtyepic 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 # 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"
52 # 4.6
53 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
60 54
61 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 55 export ALLOWED_FLAGS
62 # NOTE: currently -Os have issues with gcc3 and K6* arch's
63 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
64 return 0 56 return 0
65} 57}
66 58
67# inverted filters for hardened compiler. This is trying to unpick 59# inverted filters for hardened compiler. This is trying to unpick
68# the hardened compiler defaults. 60# the hardened compiler defaults.
91 83
92# Remove occurrences of strings from variable given in $1 84# Remove occurrences of strings from variable given in $1
93# Strings removed are matched as globs, so for example 85# Strings removed are matched as globs, so for example
94# '-O*' would remove -O1, -O2 etc. 86# '-O*' would remove -O1, -O2 etc.
95_filter-var() { 87_filter-var() {
96 local f x VAR VAL 88 local f x var=$1 new=()
97 declare -a new
98
99 VAR=$1
100 shift 89 shift
101 eval VAL=\${${VAR}} 90
102 for f in ${VAL}; do 91 for f in ${!var} ; do
103 for x in "$@"; do 92 for x in "$@" ; do
104 # Note this should work with globs like -O* 93 # Note this should work with globs like -O*
105 [[ ${f} == ${x} ]] && continue 2 94 [[ ${f} == ${x} ]] && continue 2
106 done 95 done
107 eval new\[\${\#new\[@]}]=\${f} 96 new+=( "${f}" )
108 done 97 done
109 eval export ${VAR}=\${new\[*]} 98 eval export ${var}=\""${new[*]}"\"
110} 99}
111 100
112# @FUNCTION: filter-flags 101# @FUNCTION: filter-flags
113# @USAGE: <flags> 102# @USAGE: <flags>
114# @DESCRIPTION: 103# @DESCRIPTION:
115# 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.
116filter-flags() { 105filter-flags() {
117 _filter-hardened "$@" 106 _filter-hardened "$@"
107 local v
108 for v in $(all-flag-vars) ; do
118 _filter-var CFLAGS "$@" 109 _filter-var ${v} "$@"
119 _filter-var CPPFLAGS "$@" 110 done
120 _filter-var CXXFLAGS "$@"
121 _filter-var FFLAGS "$@"
122 _filter-var FCFLAGS "$@"
123 return 0 111 return 0
124} 112}
125 113
126# @FUNCTION: filter-lfs-flags 114# @FUNCTION: filter-lfs-flags
127# @DESCRIPTION: 115# @DESCRIPTION:
128# Remove flags that enable Large File Support. 116# Remove flags that enable Large File Support.
129filter-lfs-flags() { 117filter-lfs-flags() {
130 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
131 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
124}
125
126# @FUNCTION: filter-ldflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Remove particular <flags> from LDFLAGS. Accepts shell globs.
130filter-ldflags() {
131 _filter-var LDFLAGS "$@"
132 return 0
132} 133}
133 134
134# @FUNCTION: append-cppflags 135# @FUNCTION: append-cppflags
135# @USAGE: <flags> 136# @USAGE: <flags>
136# @DESCRIPTION: 137# @DESCRIPTION:
137# Add extra <flags> to the current CPPFLAGS. 138# Add extra <flags> to the current CPPFLAGS.
138append-cppflags() { 139append-cppflags() {
139 [[ -z $* ]] && return 0 140 [[ $# -eq 0 ]] && return 0
140 export CPPFLAGS="${CPPFLAGS} $*" 141 export CPPFLAGS="${CPPFLAGS} $*"
141 return 0 142 return 0
142} 143}
143 144
144# @FUNCTION: append-cflags 145# @FUNCTION: append-cflags
145# @USAGE: <flags> 146# @USAGE: <flags>
146# @DESCRIPTION: 147# @DESCRIPTION:
147# Add extra <flags> to the current CFLAGS. 148# Add extra <flags> to the current CFLAGS.
148append-cflags() { 149append-cflags() {
149 [[ -z $* ]] && return 0 150 [[ $# -eq 0 ]] && return 0
150 export CFLAGS="${CFLAGS} $*" 151 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
151 return 0 152 return 0
152} 153}
153 154
154# @FUNCTION: append-cxxflags 155# @FUNCTION: append-cxxflags
155# @USAGE: <flags> 156# @USAGE: <flags>
156# @DESCRIPTION: 157# @DESCRIPTION:
157# Add extra <flags> to the current CXXFLAGS. 158# Add extra <flags> to the current CXXFLAGS.
158append-cxxflags() { 159append-cxxflags() {
159 [[ -z $* ]] && return 0 160 [[ $# -eq 0 ]] && return 0
160 export CXXFLAGS="${CXXFLAGS} $*" 161 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
161 return 0 162 return 0
162} 163}
163 164
164# @FUNCTION: append-fflags 165# @FUNCTION: append-fflags
165# @USAGE: <flags> 166# @USAGE: <flags>
166# @DESCRIPTION: 167# @DESCRIPTION:
167# Add extra <flags> to the current {F,FC}FLAGS. 168# Add extra <flags> to the current {F,FC}FLAGS.
168append-fflags() { 169append-fflags() {
169 [[ -z $* ]] && return 0 170 [[ $# -eq 0 ]] && return 0
170 export FFLAGS="${FFLAGS} $*" 171 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
171 export FCFLAGS="${FCFLAGS} $*" 172 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
172 return 0 173 return 0
173} 174}
174 175
175# @FUNCTION: append-lfs-flags 176# @FUNCTION: append-lfs-flags
176# @DESCRIPTION: 177# @DESCRIPTION:
177# Add flags that enable Large File Support. 178# Add flags that enable Large File Support.
178append-lfs-flags() { 179append-lfs-flags() {
179 [[ -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
180 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
181} 199}
182 200
183# @FUNCTION: append-flags 201# @FUNCTION: append-flags
184# @USAGE: <flags> 202# @USAGE: <flags>
185# @DESCRIPTION: 203# @DESCRIPTION:
186# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 204# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
187append-flags() { 205append-flags() {
188 [[ -z $* ]] && return 0 206 [[ $# -eq 0 ]] && return 0
207 case " $* " in
208 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
209 *' '-L*|\
210 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
211 esac
189 append-cflags "$@" 212 append-cflags "$@"
190 append-cxxflags "$@" 213 append-cxxflags "$@"
191 append-fflags "$@" 214 append-fflags "$@"
192 return 0 215 return 0
193} 216}
195# @FUNCTION: replace-flags 218# @FUNCTION: replace-flags
196# @USAGE: <old> <new> 219# @USAGE: <old> <new>
197# @DESCRIPTION: 220# @DESCRIPTION:
198# Replace the <old> flag with <new>. Accepts shell globs for <old>. 221# Replace the <old> flag with <new>. Accepts shell globs for <old>.
199replace-flags() { 222replace-flags() {
200 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 223 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
202 && die "replace-flags takes 2 arguments, not $#"
203 224
204 local f fset 225 local f var new
205 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS 226 for var in $(all-flag-vars) ; do
206
207 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
208 # Looping over the flags instead of using a global 227 # Looping over the flags instead of using a global
209 # substitution ensures that we're working with flag atoms. 228 # substitution ensures that we're working with flag atoms.
210 # Otherwise globs like -O* have the potential to wipe out the 229 # Otherwise globs like -O* have the potential to wipe out the
211 # list of flags. 230 # list of flags.
231 new=()
212 for f in ${!fset}; do 232 for f in ${!var} ; do
213 # Note this should work with globs like -O* 233 # Note this should work with globs like -O*
214 [[ ${f} == ${1} ]] && f=${2} 234 [[ ${f} == ${1} ]] && f=${2}
215 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 235 new+=( "${f}" )
216 done 236 done
217 eval export ${fset}=\${new_${fset}\[*]} 237 eval export ${var}=\""${new[*]}"\"
218 done 238 done
219 239
220 return 0 240 return 0
221} 241}
222 242
250# @USAGE: <flag> 270# @USAGE: <flag>
251# @DESCRIPTION: 271# @DESCRIPTION:
252# 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.
253is-flagq() { 273is-flagq() {
254 [[ -n $2 ]] && die "Usage: is-flag <flag>" 274 [[ -n $2 ]] && die "Usage: is-flag <flag>"
255 _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} "$1" && return 0
279 done
280 return 1
256} 281}
257 282
258# @FUNCTION: is-flag 283# @FUNCTION: is-flag
259# @USAGE: <flag> 284# @USAGE: <flag>
260# @DESCRIPTION: 285# @DESCRIPTION:
316 341
317# @FUNCTION: strip-flags 342# @FUNCTION: strip-flags
318# @DESCRIPTION: 343# @DESCRIPTION:
319# Strip C[XX]FLAGS of everything except known good/safe flags. 344# Strip C[XX]FLAGS of everything except known good/safe flags.
320strip-flags() { 345strip-flags() {
321 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS 346 local x y var
322 347
323 setup-allowed-flags 348 setup-allowed-flags
324 349
325 local NEW_CFLAGS=""
326 local NEW_CXXFLAGS=""
327 local NEW_FFLAGS=""
328 local NEW_FCFLAGS=""
329
330 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
331 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
332 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
333 fi
334
335 set -f # disable pathname expansion 350 set -f # disable pathname expansion
336 351
337 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%%=*}
338 for y in ${ALLOWED_FLAGS}; do 357 for y in ${ALLOWED_FLAGS} ; do
339 flag=${x%%=*}
340 if [ "${flag%%${y}}" = "" ] ; then 358 if [[ -z ${flag%%${y}} ]] ; then
341 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 359 new+=( "${x}" )
342 break 360 break
343 fi 361 fi
344 done 362 done
345 done 363 done
346 364
347 for x in ${CXXFLAGS}; do
348 for y in ${ALLOWED_FLAGS}; do
349 flag=${x%%=*}
350 if [ "${flag%%${y}}" = "" ] ; then
351 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
352 break
353 fi
354 done
355 done
356
357 for x in ${FFLAGS}; do
358 for y in ${ALLOWED_FLAGS}; do
359 flag=${x%%=*}
360 if [ "${flag%%${y}}" = "" ] ; then
361 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
362 break
363 fi
364 done
365 done
366
367 for x in ${FCFLAGS}; do
368 for y in ${ALLOWED_FLAGS}; do
369 flag=${x%%=*}
370 if [ "${flag%%${y}}" = "" ] ; then
371 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
372 break
373 fi
374 done
375 done
376
377 # In case we filtered out all optimization flags fallback to -O2 365 # In case we filtered out all optimization flags fallback to -O2
378 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 366 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
379 NEW_CFLAGS="${NEW_CFLAGS} -O2" 367 new+=( -O2 )
380 fi 368 fi
381 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 369
382 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 370 eval export ${var}=\""${new[*]}"\"
383 fi 371 done
384 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
385 NEW_FFLAGS="${NEW_FFLAGS} -O2"
386 fi
387 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
388 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
389 fi
390 372
391 set +f # re-enable pathname expansion 373 set +f # re-enable pathname expansion
392 374
393 export CFLAGS="${NEW_CFLAGS}"
394 export CXXFLAGS="${NEW_CXXFLAGS}"
395 export FFLAGS="${NEW_FFLAGS}"
396 export FCFLAGS="${NEW_FCFLAGS}"
397 return 0 375 return 0
398} 376}
399 377
400test-flag-PROG() { 378test-flag-PROG() {
401 local comp=$1 379 local comp=$1
402 local flags="$2" 380 local flag=$2
403 381
404 [[ -z ${comp} || -z ${flags} ]] && \ 382 [[ -z ${comp} || -z ${flag} ]] && return 1
405 return 1
406 383
384 # use -c so we can test the assembler as well
407 local PROG=$(tc-get${comp}) 385 local PROG=$(tc-get${comp})
408 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 386 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
409 > /dev/null 2>&1 387 > /dev/null 2>&1
410} 388}
411 389
412# @FUNCTION: test-flag-CC 390# @FUNCTION: test-flag-CC
413# @USAGE: <flag> 391# @USAGE: <flag>
440 418
441 shift 419 shift
442 420
443 [[ -z ${comp} ]] && return 1 421 [[ -z ${comp} ]] && return 1
444 422
445 x=""
446 for x in "$@" ; do 423 for x in "$@" ; do
447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 424 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
448 done 425 done
449 426
450 echo "${flags}" 427 echo "${flags}"
481# @USAGE: <flags> 458# @USAGE: <flags>
482# @DESCRIPTION: 459# @DESCRIPTION:
483# Short-hand that should hopefully work for both C and C++ compiler, but 460# Short-hand that should hopefully work for both C and C++ compiler, but
484# its really only present due to the append-flags() abomination. 461# its really only present due to the append-flags() abomination.
485test-flags() { test-flags-CC "$@"; } 462test-flags() { test-flags-CC "$@"; }
486
487# @FUNCTION: test_flag
488# @DESCRIPTION:
489# DEPRICIATED, use test-flags()
490test_flag() {
491 ewarn "test_flag: deprecated, please use test-flags()!" >&2
492
493 test-flags-CC "$@"
494}
495 463
496# @FUNCTION: test_version_info 464# @FUNCTION: test_version_info
497# @USAGE: <version> 465# @USAGE: <version>
498# @DESCRIPTION: 466# @DESCRIPTION:
499# 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.
519# @FUNCTION: get-flag 487# @FUNCTION: get-flag
520# @USAGE: <flag> 488# @USAGE: <flag>
521# @DESCRIPTION: 489# @DESCRIPTION:
522# 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.
523get-flag() { 491get-flag() {
524 local f findflag="$1" 492 local f var findflag="$1"
525 493
526 # this code looks a little flaky but seems to work for 494 # this code looks a little flaky but seems to work for
527 # everything we want ... 495 # everything we want ...
528 # for example, if CFLAGS="-march=i686": 496 # for example, if CFLAGS="-march=i686":
529 # `get-flag -march` == "-march=i686" 497 # `get-flag -march` == "-march=i686"
530 # `get-flag march` == "i686" 498 # `get-flag march` == "i686"
531 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do 499 for var in $(all-flag-vars) ; do
500 for f in ${!var} ; do
532 if [ "${f/${findflag}}" != "${f}" ] ; then 501 if [ "${f/${findflag}}" != "${f}" ] ; then
533 printf "%s\n" "${f/-${findflag}=}" 502 printf "%s\n" "${f/-${findflag}=}"
534 return 0 503 return 0
535 fi 504 fi
505 done
536 done 506 done
537 return 1 507 return 1
538}
539
540# @FUNCTION: has_hardened
541# @DESCRIPTION:
542# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
543has_hardened() {
544 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
545
546 test_version_info Hardened && return 0
547 # The specs file wont exist unless gcc has GCC_SPECS support
548 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
549}
550
551# @FUNCTION: has_pic
552# @DESCRIPTION:
553# DEPRECATED - use gcc-specs-pie from toolchain-funcs
554# indicate whether PIC is set
555has_pic() {
556 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
557
558 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
559 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
560 gcc-specs-pie
561}
562
563# @FUNCTION: has_pie
564# @DESCRIPTION:
565# DEPRECATED - use gcc-specs-pie from toolchain-funcs
566# indicate whether PIE is set
567has_pie() {
568 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
569
570 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
571 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
572 gcc-specs-pie
573}
574
575# @FUNCTION: has_ssp_all
576# @DESCRIPTION:
577# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
578# indicate whether code for SSP is being generated for all functions
579has_ssp_all() {
580 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
581
582 # note; this matches only -fstack-protector-all
583 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
584 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
585 gcc-specs-ssp-to-all
586}
587
588# @FUNCTION: has_ssp
589# @DESCRIPTION:
590# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
591# indicate whether code for SSP is being generated
592has_ssp() {
593 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
594
595 # note; this matches both -fstack-protector and -fstack-protector-all
596 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
597 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
598 gcc-specs-ssp
599} 508}
600 509
601# @FUNCTION: has_m64 510# @FUNCTION: has_m64
602# @DESCRIPTION: 511# @DESCRIPTION:
603# This doesn't test if the flag is accepted, it tests if the flag actually 512# This doesn't test if the flag is accepted, it tests if the flag actually
604# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 513# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
605# return code is 0, else the return code is 1. 514# return code is 0, else the return code is 1.
606has_m64() { 515has_m64() {
516 eqawarn "${FUNCNAME}: don't use this anymore"
517
607 # 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
608 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 519 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
609 # please dont replace this function with test_flag in some future 520 # please dont replace this function with test_flag in some future
610 # clean-up! 521 # clean-up!
611 522
617 rm -f "${temp}".c 528 rm -f "${temp}".c
618 [[ ${ret} != 1 ]] && return 0 529 [[ ${ret} != 1 ]] && return 0
619 return 1 530 return 1
620} 531}
621 532
622# @FUNCTION: has_m32
623# @DESCRIPTION:
624# This doesn't test if the flag is accepted, it tests if the flag actually
625# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
626# code is 0, else return code is 1.
627has_m32() { 533has_m32() {
628 # this doesnt test if the flag is accepted, it tests if the flag 534 die "${FUNCNAME}: don't use this anymore"
629 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
630 # please dont replace this function with test_flag in some future
631 # clean-up!
632
633 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
634
635 local temp=$(emktemp)
636 echo "int main() { return(0); }" > "${temp}".c
637 MY_CC=$(tc-getCC)
638 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
639 local ret=$?
640 rm -f "${temp}".c
641 [[ ${ret} != 1 ]] && return 0
642 return 1
643} 535}
644 536
645# @FUNCTION: replace-sparc64-flags 537# @FUNCTION: replace-sparc64-flags
646# @DESCRIPTION: 538# @DESCRIPTION:
647# 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.
674# @FUNCTION: append-libs 566# @FUNCTION: append-libs
675# @USAGE: <libs> 567# @USAGE: <libs>
676# @DESCRIPTION: 568# @DESCRIPTION:
677# Add extra <libs> to the current LIBS. 569# Add extra <libs> to the current LIBS.
678append-libs() { 570append-libs() {
679 [[ -z $* ]] && return 0 571 [[ $# -eq 0 ]] && return 0
680 local flag 572 local flag
681 for flag in "$@"; do 573 for flag in "$@"; do
682 [[ ${flag} == -l* ]] && flag=${flag#-l} 574 [[ ${flag} == -l* ]] && flag=${flag#-l}
683 export LIBS="${LIBS} -l${flag}" 575 export LIBS="${LIBS} -l${flag}"
684 done 576 done
685 577
686 return 0 578 return 0
687} 579}
688 580
689# @FUNCTION: append-ldflags
690# @USAGE: <flags>
691# @DESCRIPTION:
692# Add extra <flags> to the current LDFLAGS.
693append-ldflags() {
694 [[ -z $* ]] && return 0
695 local flag
696 for flag in "$@"; do
697 [[ ${flag} == -l* ]] && \
698 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
699 done
700
701 export LDFLAGS="${LDFLAGS} $*"
702 return 0
703}
704
705# @FUNCTION: filter-ldflags
706# @USAGE: <flags>
707# @DESCRIPTION:
708# Remove particular <flags> from LDFLAGS. Accepts shell globs.
709filter-ldflags() {
710 _filter-var LDFLAGS "$@"
711 return 0
712}
713
714# @FUNCTION: raw-ldflags 581# @FUNCTION: raw-ldflags
715# @USAGE: <flags> 582# @USAGE: [flags]
716# @DESCRIPTION: 583# @DESCRIPTION:
717# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 584# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
718# 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
719# 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 ${LDFLAGS}.
720raw-ldflags() { 589raw-ldflags() {
721 local x input="$@" 590 local x input="$@"
722 [[ -z ${input} ]] && input=${LDFLAGS} 591 [[ -z ${input} ]] && input=${LDFLAGS}
723 set -- 592 set --
724 for x in ${input} ; do 593 for x in ${input} ; do
735 *GNU*) # GNU ld 604 *GNU*) # GNU ld
736 echo "-Wl,--no-as-needed" ;; 605 echo "-Wl,--no-as-needed" ;;
737 esac 606 esac
738} 607}
739 608
740# Some tests for when we screw with things and want to make 609fi
741# sure we didn't break anything
742#TESTS() {
743# CFLAGS="-a -b -c=1"
744# CXXFLAGS="-x -y -z=2"
745# LDFLAGS="-l -m -n=3"
746#
747# die() { exit 1; }
748# (is-flag 1 2 3) && die
749# (is-ldflag 1 2 3) && die
750#
751# is-flagq -l && die
752# is-ldflagq -a && die
753# is-flagq -a || die
754# is-flagq -x || die
755# is-ldflagq -n=* || die
756# is-ldflagq -n && die
757#
758# strip-unsupported-flags
759# [[ ${CFLAGS} == "-c=1" ]] || die
760# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
761#
762# echo "All tests pass"
763#}
764#TESTS

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