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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 1.150 2011/02/25 10:51:44 dirtyepic Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.178 2012/10/30 20:20:37 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 22
28
29# {C,CXX,F,FC}FLAGS that we allow in strip-flags 23# {C,CPP,CXX,CCAS,F,FC,LD}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed 24# Note: shell globs and character lists are allowed
31setup-allowed-flags() { 25setup-allowed-flags() {
32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
33 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive" 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w" 33 ALLOWED_FLAGS+=" -W* -w"
41 fi 34
42 # allow a bunch of flags that negate features / control ABI 35 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer" 37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \ 40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \ 41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
48 -mno-popcnt -mno-abm \
49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \ 42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \ 44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi=* \
56 -msecure-plt -m*-toc -D* -U*" 49 -D* -U*"
57 50
58 # 4.5 51 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp" 52 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 # 4.6 53 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \ 54 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
62 -mno-bmi -mno-tbm" 55 # 4.7
56 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
63 57
64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 58 # CPPFLAGS and LDFLAGS
65 # NOTE: currently -Os have issues with gcc3 and K6* arch's 59 ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 60
61 export ALLOWED_FLAGS
67 return 0 62 return 0
68} 63}
69 64
70# inverted filters for hardened compiler. This is trying to unpick 65# inverted filters for hardened compiler. This is trying to unpick
71# the hardened compiler defaults. 66# the hardened compiler defaults.
94 89
95# Remove occurrences of strings from variable given in $1 90# Remove occurrences of strings from variable given in $1
96# Strings removed are matched as globs, so for example 91# Strings removed are matched as globs, so for example
97# '-O*' would remove -O1, -O2 etc. 92# '-O*' would remove -O1, -O2 etc.
98_filter-var() { 93_filter-var() {
99 local f x VAR VAL 94 local f x var=$1 new=()
100 declare -a new
101
102 VAR=$1
103 shift 95 shift
104 eval VAL=\${${VAR}} 96
105 for f in ${VAL}; do 97 for f in ${!var} ; do
106 for x in "$@"; do 98 for x in "$@" ; do
107 # Note this should work with globs like -O* 99 # Note this should work with globs like -O*
108 [[ ${f} == ${x} ]] && continue 2 100 [[ ${f} == ${x} ]] && continue 2
109 done 101 done
110 eval new\[\${\#new\[@]}]=\${f} 102 new+=( "${f}" )
111 done 103 done
112 eval export ${VAR}=\${new\[*]} 104 eval export ${var}=\""${new[*]}"\"
113} 105}
114 106
115# @FUNCTION: filter-flags 107# @FUNCTION: filter-flags
116# @USAGE: <flags> 108# @USAGE: <flags>
117# @DESCRIPTION: 109# @DESCRIPTION:
118# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs. 110# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
119filter-flags() { 111filter-flags() {
120 _filter-hardened "$@" 112 _filter-hardened "$@"
113 local v
114 for v in $(all-flag-vars) ; do
121 _filter-var CFLAGS "$@" 115 _filter-var ${v} "$@"
122 _filter-var CPPFLAGS "$@" 116 done
123 _filter-var CXXFLAGS "$@"
124 _filter-var FFLAGS "$@"
125 _filter-var FCFLAGS "$@"
126 return 0 117 return 0
127} 118}
128 119
129# @FUNCTION: filter-lfs-flags 120# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION: 121# @DESCRIPTION:
131# Remove flags that enable Large File Support. 122# Remove flags that enable Large File Support.
132filter-lfs-flags() { 123filter-lfs-flags() {
133 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 124 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
125 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
126 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
127 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
128 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 129 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
130}
131
132# @FUNCTION: filter-ldflags
133# @USAGE: <flags>
134# @DESCRIPTION:
135# Remove particular <flags> from LDFLAGS. Accepts shell globs.
136filter-ldflags() {
137 _filter-var LDFLAGS "$@"
138 return 0
135} 139}
136 140
137# @FUNCTION: append-cppflags 141# @FUNCTION: append-cppflags
138# @USAGE: <flags> 142# @USAGE: <flags>
139# @DESCRIPTION: 143# @DESCRIPTION:
140# Add extra <flags> to the current CPPFLAGS. 144# Add extra <flags> to the current CPPFLAGS.
141append-cppflags() { 145append-cppflags() {
142 [[ -z $* ]] && return 0 146 [[ $# -eq 0 ]] && return 0
143 export CPPFLAGS="${CPPFLAGS} $*" 147 export CPPFLAGS="${CPPFLAGS} $*"
144 return 0 148 return 0
145} 149}
146 150
147# @FUNCTION: append-cflags 151# @FUNCTION: append-cflags
148# @USAGE: <flags> 152# @USAGE: <flags>
149# @DESCRIPTION: 153# @DESCRIPTION:
150# Add extra <flags> to the current CFLAGS. 154# Add extra <flags> to the current CFLAGS.
151append-cflags() { 155append-cflags() {
152 [[ -z $* ]] && return 0 156 [[ $# -eq 0 ]] && return 0
153 export CFLAGS="${CFLAGS} $*" 157 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
154 return 0 158 return 0
155} 159}
156 160
157# @FUNCTION: append-cxxflags 161# @FUNCTION: append-cxxflags
158# @USAGE: <flags> 162# @USAGE: <flags>
159# @DESCRIPTION: 163# @DESCRIPTION:
160# Add extra <flags> to the current CXXFLAGS. 164# Add extra <flags> to the current CXXFLAGS.
161append-cxxflags() { 165append-cxxflags() {
162 [[ -z $* ]] && return 0 166 [[ $# -eq 0 ]] && return 0
163 export CXXFLAGS="${CXXFLAGS} $*" 167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
164 return 0 168 return 0
165} 169}
166 170
167# @FUNCTION: append-fflags 171# @FUNCTION: append-fflags
168# @USAGE: <flags> 172# @USAGE: <flags>
169# @DESCRIPTION: 173# @DESCRIPTION:
170# Add extra <flags> to the current {F,FC}FLAGS. 174# Add extra <flags> to the current {F,FC}FLAGS.
171append-fflags() { 175append-fflags() {
172 [[ -z $* ]] && return 0 176 [[ $# -eq 0 ]] && return 0
173 export FFLAGS="${FFLAGS} $*" 177 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
174 export FCFLAGS="${FCFLAGS} $*" 178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
175 return 0 179 return 0
176} 180}
177 181
178# @FUNCTION: append-lfs-flags 182# @FUNCTION: append-lfs-flags
179# @DESCRIPTION: 183# @DESCRIPTION:
180# Add flags that enable Large File Support. 184# Add flags that enable Large File Support.
181append-lfs-flags() { 185append-lfs-flags() {
182 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # see comments in filter-lfs-flags func for meaning of these
183 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189}
190
191# @FUNCTION: append-ldflags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to the current LDFLAGS.
195append-ldflags() {
196 [[ $# -eq 0 ]] && return 0
197 local flag
198 for flag in "$@"; do
199 [[ ${flag} == -l* ]] && \
200 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
201 done
202
203 export LDFLAGS="${LDFLAGS} $*"
204 return 0
184} 205}
185 206
186# @FUNCTION: append-flags 207# @FUNCTION: append-flags
187# @USAGE: <flags> 208# @USAGE: <flags>
188# @DESCRIPTION: 209# @DESCRIPTION:
189# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 210# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
190append-flags() { 211append-flags() {
191 [[ -z $* ]] && return 0 212 [[ $# -eq 0 ]] && return 0
213 case " $* " in
214 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
215 *' '-L*|\
216 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
217 esac
192 append-cflags "$@" 218 append-cflags "$@"
193 append-cxxflags "$@" 219 append-cxxflags "$@"
194 append-fflags "$@" 220 append-fflags "$@"
195 return 0 221 return 0
196} 222}
198# @FUNCTION: replace-flags 224# @FUNCTION: replace-flags
199# @USAGE: <old> <new> 225# @USAGE: <old> <new>
200# @DESCRIPTION: 226# @DESCRIPTION:
201# Replace the <old> flag with <new>. Accepts shell globs for <old>. 227# Replace the <old> flag with <new>. Accepts shell globs for <old>.
202replace-flags() { 228replace-flags() {
203 [[ $# != 2 ]] \
204 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 229 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
205 && die "replace-flags takes 2 arguments, not $#"
206 230
207 local f fset 231 local f var new
208 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS 232 for var in $(all-flag-vars) ; do
209
210 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
211 # Looping over the flags instead of using a global 233 # Looping over the flags instead of using a global
212 # substitution ensures that we're working with flag atoms. 234 # substitution ensures that we're working with flag atoms.
213 # Otherwise globs like -O* have the potential to wipe out the 235 # Otherwise globs like -O* have the potential to wipe out the
214 # list of flags. 236 # list of flags.
237 new=()
215 for f in ${!fset}; do 238 for f in ${!var} ; do
216 # Note this should work with globs like -O* 239 # Note this should work with globs like -O*
217 [[ ${f} == ${1} ]] && f=${2} 240 [[ ${f} == ${1} ]] && f=${2}
218 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 241 new+=( "${f}" )
219 done 242 done
220 eval export ${fset}=\${new_${fset}\[*]} 243 eval export ${var}=\""${new[*]}"\"
221 done 244 done
222 245
223 return 0 246 return 0
224} 247}
225 248
253# @USAGE: <flag> 276# @USAGE: <flag>
254# @DESCRIPTION: 277# @DESCRIPTION:
255# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. 278# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
256is-flagq() { 279is-flagq() {
257 [[ -n $2 ]] && die "Usage: is-flag <flag>" 280 [[ -n $2 ]] && die "Usage: is-flag <flag>"
258 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1 281
282 local var
283 for var in $(all-flag-vars) ; do
284 _is_flagq ${var} "$1" && return 0
285 done
286 return 1
259} 287}
260 288
261# @FUNCTION: is-flag 289# @FUNCTION: is-flag
262# @USAGE: <flag> 290# @USAGE: <flag>
263# @DESCRIPTION: 291# @DESCRIPTION:
317 return 0 345 return 0
318} 346}
319 347
320# @FUNCTION: strip-flags 348# @FUNCTION: strip-flags
321# @DESCRIPTION: 349# @DESCRIPTION:
322# Strip C[XX]FLAGS of everything except known good/safe flags. 350# Strip *FLAGS of everything except known good/safe flags. This runs over all
351# flags returned by all_flag_vars().
323strip-flags() { 352strip-flags() {
324 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS 353 local x y var
325 354
326 setup-allowed-flags 355 setup-allowed-flags
327 356
328 local NEW_CFLAGS=""
329 local NEW_CXXFLAGS=""
330 local NEW_FFLAGS=""
331 local NEW_FCFLAGS=""
332
333 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
334 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
335 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
336 fi
337
338 set -f # disable pathname expansion 357 set -f # disable pathname expansion
339 358
340 for x in ${CFLAGS}; do 359 for var in $(all-flag-vars) ; do
360 local new=()
361
362 for x in ${!var} ; do
363 local flag=${x%%=*}
341 for y in ${ALLOWED_FLAGS}; do 364 for y in ${ALLOWED_FLAGS} ; do
342 flag=${x%%=*}
343 if [ "${flag%%${y}}" = "" ] ; then 365 if [[ -z ${flag%%${y}} ]] ; then
344 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 366 new+=( "${x}" )
345 break 367 break
346 fi 368 fi
347 done 369 done
348 done 370 done
349 371
350 for x in ${CXXFLAGS}; do
351 for y in ${ALLOWED_FLAGS}; do
352 flag=${x%%=*}
353 if [ "${flag%%${y}}" = "" ] ; then
354 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
355 break
356 fi
357 done
358 done
359
360 for x in ${FFLAGS}; do
361 for y in ${ALLOWED_FLAGS}; do
362 flag=${x%%=*}
363 if [ "${flag%%${y}}" = "" ] ; then
364 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
365 break
366 fi
367 done
368 done
369
370 for x in ${FCFLAGS}; do
371 for y in ${ALLOWED_FLAGS}; do
372 flag=${x%%=*}
373 if [ "${flag%%${y}}" = "" ] ; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
375 break
376 fi
377 done
378 done
379
380 # In case we filtered out all optimization flags fallback to -O2 372 # In case we filtered out all optimization flags fallback to -O2
381 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 373 if _is_flagq ${var} "-O*" && ! (_is_flagq new "-O*" || _is_flagq new -O) ; then
382 NEW_CFLAGS="${NEW_CFLAGS} -O2" 374 new+=( -O2 )
383 fi 375 fi
384 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 376
385 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 377 eval export ${var}=\""${new[*]}"\"
386 fi 378 done
387 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
388 NEW_FFLAGS="${NEW_FFLAGS} -O2"
389 fi
390 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
391 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
392 fi
393 379
394 set +f # re-enable pathname expansion 380 set +f # re-enable pathname expansion
395 381
396 export CFLAGS="${NEW_CFLAGS}"
397 export CXXFLAGS="${NEW_CXXFLAGS}"
398 export FFLAGS="${NEW_FFLAGS}"
399 export FCFLAGS="${NEW_FCFLAGS}"
400 return 0 382 return 0
401} 383}
402 384
403test-flag-PROG() { 385test-flag-PROG() {
404 local comp=$1 386 local comp=$1
405 local flags="$2" 387 local flag=$2
406 388
407 [[ -z ${comp} || -z ${flags} ]] && \ 389 [[ -z ${comp} || -z ${flag} ]] && return 1
408 return 1
409 390
391 # use -c so we can test the assembler as well
410 local PROG=$(tc-get${comp}) 392 local PROG=$(tc-get${comp})
411 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 393 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
412 > /dev/null 2>&1 394 > /dev/null 2>&1
413} 395}
414 396
415# @FUNCTION: test-flag-CC 397# @FUNCTION: test-flag-CC
416# @USAGE: <flag> 398# @USAGE: <flag>
443 425
444 shift 426 shift
445 427
446 [[ -z ${comp} ]] && return 1 428 [[ -z ${comp} ]] && return 1
447 429
448 x=""
449 for x in "$@" ; do 430 for x in "$@" ; do
450 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 431 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
451 done 432 done
452 433
453 echo "${flags}" 434 echo "${flags}"
484# @USAGE: <flags> 465# @USAGE: <flags>
485# @DESCRIPTION: 466# @DESCRIPTION:
486# Short-hand that should hopefully work for both C and C++ compiler, but 467# Short-hand that should hopefully work for both C and C++ compiler, but
487# its really only present due to the append-flags() abomination. 468# its really only present due to the append-flags() abomination.
488test-flags() { test-flags-CC "$@"; } 469test-flags() { test-flags-CC "$@"; }
489
490# @FUNCTION: test_flag
491# @DESCRIPTION:
492# DEPRICIATED, use test-flags()
493test_flag() {
494 ewarn "test_flag: deprecated, please use test-flags()!" >&2
495
496 test-flags-CC "$@"
497}
498 470
499# @FUNCTION: test_version_info 471# @FUNCTION: test_version_info
500# @USAGE: <version> 472# @USAGE: <version>
501# @DESCRIPTION: 473# @DESCRIPTION:
502# Returns shell true if the current C compiler version matches <version>, else returns shell false. 474# Returns shell true if the current C compiler version matches <version>, else returns shell false.
522# @FUNCTION: get-flag 494# @FUNCTION: get-flag
523# @USAGE: <flag> 495# @USAGE: <flag>
524# @DESCRIPTION: 496# @DESCRIPTION:
525# Find and echo the value for a particular flag. Accepts shell globs. 497# Find and echo the value for a particular flag. Accepts shell globs.
526get-flag() { 498get-flag() {
527 local f findflag="$1" 499 local f var findflag="$1"
528 500
529 # this code looks a little flaky but seems to work for 501 # this code looks a little flaky but seems to work for
530 # everything we want ... 502 # everything we want ...
531 # for example, if CFLAGS="-march=i686": 503 # for example, if CFLAGS="-march=i686":
532 # `get-flag -march` == "-march=i686" 504 # `get-flag -march` == "-march=i686"
533 # `get-flag march` == "i686" 505 # `get-flag march` == "i686"
534 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do 506 for var in $(all-flag-vars) ; do
507 for f in ${!var} ; do
535 if [ "${f/${findflag}}" != "${f}" ] ; then 508 if [ "${f/${findflag}}" != "${f}" ] ; then
536 printf "%s\n" "${f/-${findflag}=}" 509 printf "%s\n" "${f/-${findflag}=}"
537 return 0 510 return 0
538 fi 511 fi
512 done
539 done 513 done
540 return 1 514 return 1
541}
542
543# @FUNCTION: has_hardened
544# @DESCRIPTION:
545# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
546has_hardened() {
547 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
548
549 test_version_info Hardened && return 0
550 # The specs file wont exist unless gcc has GCC_SPECS support
551 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
552}
553
554# @FUNCTION: has_pic
555# @DESCRIPTION:
556# DEPRECATED - use gcc-specs-pie from toolchain-funcs
557# indicate whether PIC is set
558has_pic() {
559 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
560
561 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
562 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
563 gcc-specs-pie
564}
565
566# @FUNCTION: has_pie
567# @DESCRIPTION:
568# DEPRECATED - use gcc-specs-pie from toolchain-funcs
569# indicate whether PIE is set
570has_pie() {
571 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
572
573 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
574 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
575 gcc-specs-pie
576}
577
578# @FUNCTION: has_ssp_all
579# @DESCRIPTION:
580# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
581# indicate whether code for SSP is being generated for all functions
582has_ssp_all() {
583 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
584
585 # note; this matches only -fstack-protector-all
586 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
587 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
588 gcc-specs-ssp-to-all
589}
590
591# @FUNCTION: has_ssp
592# @DESCRIPTION:
593# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
594# indicate whether code for SSP is being generated
595has_ssp() {
596 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
597
598 # note; this matches both -fstack-protector and -fstack-protector-all
599 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
600 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
601 gcc-specs-ssp
602} 515}
603 516
604# @FUNCTION: has_m64 517# @FUNCTION: has_m64
605# @DESCRIPTION: 518# @DESCRIPTION:
606# This doesn't test if the flag is accepted, it tests if the flag actually 519# This doesn't test if the flag is accepted, it tests if the flag actually
607# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 520# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
608# return code is 0, else the return code is 1. 521# return code is 0, else the return code is 1.
609has_m64() { 522has_m64() {
523 eqawarn "${FUNCNAME}: don't use this anymore"
524
610 # this doesnt test if the flag is accepted, it tests if the flag 525 # this doesnt test if the flag is accepted, it tests if the flag
611 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 526 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
612 # please dont replace this function with test_flag in some future 527 # please dont replace this function with test_flag in some future
613 # clean-up! 528 # clean-up!
614 529
620 rm -f "${temp}".c 535 rm -f "${temp}".c
621 [[ ${ret} != 1 ]] && return 0 536 [[ ${ret} != 1 ]] && return 0
622 return 1 537 return 1
623} 538}
624 539
625# @FUNCTION: has_m32
626# @DESCRIPTION:
627# This doesn't test if the flag is accepted, it tests if the flag actually
628# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
629# code is 0, else return code is 1.
630has_m32() { 540has_m32() {
631 # this doesnt test if the flag is accepted, it tests if the flag 541 die "${FUNCNAME}: don't use this anymore"
632 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
633 # please dont replace this function with test_flag in some future
634 # clean-up!
635
636 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
637
638 local temp=$(emktemp)
639 echo "int main() { return(0); }" > "${temp}".c
640 MY_CC=$(tc-getCC)
641 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
642 local ret=$?
643 rm -f "${temp}".c
644 [[ ${ret} != 1 ]] && return 0
645 return 1
646} 542}
647 543
648# @FUNCTION: replace-sparc64-flags 544# @FUNCTION: replace-sparc64-flags
649# @DESCRIPTION: 545# @DESCRIPTION:
650# Sets mcpu to v8 and uses the original value as mtune if none specified. 546# Sets mcpu to v8 and uses the original value as mtune if none specified.
677# @FUNCTION: append-libs 573# @FUNCTION: append-libs
678# @USAGE: <libs> 574# @USAGE: <libs>
679# @DESCRIPTION: 575# @DESCRIPTION:
680# Add extra <libs> to the current LIBS. 576# Add extra <libs> to the current LIBS.
681append-libs() { 577append-libs() {
682 [[ -z $* ]] && return 0 578 [[ $# -eq 0 ]] && return 0
683 local flag 579 local flag
684 for flag in "$@"; do 580 for flag in "$@"; do
685 [[ ${flag} == -l* ]] && flag=${flag#-l} 581 [[ ${flag} == -l* ]] && flag=${flag#-l}
686 export LIBS="${LIBS} -l${flag}" 582 export LIBS="${LIBS} -l${flag}"
687 done 583 done
688 584
689 return 0 585 return 0
690} 586}
691 587
692# @FUNCTION: append-ldflags
693# @USAGE: <flags>
694# @DESCRIPTION:
695# Add extra <flags> to the current LDFLAGS.
696append-ldflags() {
697 [[ -z $* ]] && return 0
698 local flag
699 for flag in "$@"; do
700 [[ ${flag} == -l* ]] && \
701 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
702 done
703
704 export LDFLAGS="${LDFLAGS} $*"
705 return 0
706}
707
708# @FUNCTION: filter-ldflags
709# @USAGE: <flags>
710# @DESCRIPTION:
711# Remove particular <flags> from LDFLAGS. Accepts shell globs.
712filter-ldflags() {
713 _filter-var LDFLAGS "$@"
714 return 0
715}
716
717# @FUNCTION: raw-ldflags 588# @FUNCTION: raw-ldflags
718# @USAGE: <flags> 589# @USAGE: [flags]
719# @DESCRIPTION: 590# @DESCRIPTION:
720# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 591# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
721# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 592# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
722# to gcc where it needs the '-Wl,'. 593# to gcc where it needs the '-Wl,'.
594#
595# If no flags are specified, then default to ${LDFLAGS}.
723raw-ldflags() { 596raw-ldflags() {
724 local x input="$@" 597 local x input="$@"
725 [[ -z ${input} ]] && input=${LDFLAGS} 598 [[ -z ${input} ]] && input=${LDFLAGS}
726 set -- 599 set --
727 for x in ${input} ; do 600 for x in ${input} ; do
738 *GNU*) # GNU ld 611 *GNU*) # GNU ld
739 echo "-Wl,--no-as-needed" ;; 612 echo "-Wl,--no-as-needed" ;;
740 esac 613 esac
741} 614}
742 615
743# Some tests for when we screw with things and want to make 616fi
744# sure we didn't break anything
745#TESTS() {
746# CFLAGS="-a -b -c=1"
747# CXXFLAGS="-x -y -z=2"
748# LDFLAGS="-l -m -n=3"
749#
750# die() { exit 1; }
751# (is-flag 1 2 3) && die
752# (is-ldflag 1 2 3) && die
753#
754# is-flagq -l && die
755# is-ldflagq -a && die
756# is-flagq -a || die
757# is-flagq -x || die
758# is-ldflagq -n=* || die
759# is-ldflagq -n && die
760#
761# strip-unsupported-flags
762# [[ ${CFLAGS} == "-c=1" ]] || die
763# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
764#
765# echo "All tests pass"
766#}
767#TESTS

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