/[gentoo-x86]/eclass/flag-o-matic.eclass
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1# Copyright 1999-2009 Gentoo Foundation 1# Copyright 1999-2014 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 1.202 2014/08/11 00:36:05 kumba 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 [[ -z ${_FLAG_O_MATIC_ECLASS} ]]; then
14_FLAG_O_MATIC_ECLASS=1
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 -Og -mcpu -march -mtune"
35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 28 ALLOWED_FLAGS+=" -fstack-protector*"
36 export ALLOWED_FLAGS="${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] -gdwarf-* gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive" 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive -frecord-gcc-switches"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w" 33 ALLOWED_FLAGS+=" -fdiagnostics*"
41 fi 34 ALLOWED_FLAGS+=" -W* -w"
35
42 # allow a bunch of flags that negate features / control ABI 36 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \ 37 ALLOWED_FLAGS+=" -fno-stack-protector* -fabi-version=* \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer" 38 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
39 -fno-omit-frame-pointer -fno-builtin*"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 40 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 \ 41 -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 \ 42 -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 \ 43 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 44 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \ 45 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 46 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 47 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 48 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 49 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi \
56 -msecure-plt -m*-toc -D* -U*" 50 -mfix-r10000 -mno-fix-r10000 -D* -U*"
57 51
58 # 4.5 52 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp" 53 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 # 4.6 54 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \ 55 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
62 -mno-bmi -mno-tbm" 56 # 4.7
57 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
58 # 4.8
59 ALLOWED_FLAGS+=" -mno-fxsr -mno-rtm -mno-xsave -mno-xsaveopt"
60 # 4.9
61 ALLOWED_FLAGS+=" -mno-avx512cd -mno-avx512er -mno-avx512f -mno-avx512pf -mno-sha"
63 62
64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing 63 # CPPFLAGS and LDFLAGS
65 # NOTE: currently -Os have issues with gcc3 and K6* arch's 64 ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 65
66 export ALLOWED_FLAGS
67 return 0 67 return 0
68} 68}
69 69
70# inverted filters for hardened compiler. This is trying to unpick 70# inverted filters for hardened compiler. This is trying to unpick
71# the hardened compiler defaults. 71# the hardened compiler defaults.
94 94
95# Remove occurrences of strings from variable given in $1 95# Remove occurrences of strings from variable given in $1
96# Strings removed are matched as globs, so for example 96# Strings removed are matched as globs, so for example
97# '-O*' would remove -O1, -O2 etc. 97# '-O*' would remove -O1, -O2 etc.
98_filter-var() { 98_filter-var() {
99 local f x VAR VAL 99 local f x var=$1 new=()
100 declare -a new
101
102 VAR=$1
103 shift 100 shift
104 eval VAL=\${${VAR}} 101
105 for f in ${VAL}; do 102 for f in ${!var} ; do
106 for x in "$@"; do 103 for x in "$@" ; do
107 # Note this should work with globs like -O* 104 # Note this should work with globs like -O*
108 [[ ${f} == ${x} ]] && continue 2 105 [[ ${f} == ${x} ]] && continue 2
109 done 106 done
110 eval new\[\${\#new\[@]}]=\${f} 107 new+=( "${f}" )
111 done 108 done
112 eval export ${VAR}=\${new\[*]} 109 eval export ${var}=\""${new[*]}"\"
113} 110}
114 111
115# @FUNCTION: filter-flags 112# @FUNCTION: filter-flags
116# @USAGE: <flags> 113# @USAGE: <flags>
117# @DESCRIPTION: 114# @DESCRIPTION:
118# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs. 115# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
119filter-flags() { 116filter-flags() {
120 _filter-hardened "$@" 117 _filter-hardened "$@"
118 local v
119 for v in $(all-flag-vars) ; do
121 _filter-var CFLAGS "$@" 120 _filter-var ${v} "$@"
122 _filter-var CPPFLAGS "$@" 121 done
123 _filter-var CXXFLAGS "$@"
124 _filter-var FFLAGS "$@"
125 _filter-var FCFLAGS "$@"
126 return 0 122 return 0
127} 123}
128 124
129# @FUNCTION: filter-lfs-flags 125# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION: 126# @DESCRIPTION:
131# Remove flags that enable Large File Support. 127# Remove flags that enable Large File Support.
132filter-lfs-flags() { 128filter-lfs-flags() {
133 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 129 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
130 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
131 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
132 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
133 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135}
136
137# @FUNCTION: filter-ldflags
138# @USAGE: <flags>
139# @DESCRIPTION:
140# Remove particular <flags> from LDFLAGS. Accepts shell globs.
141filter-ldflags() {
142 _filter-var LDFLAGS "$@"
143 return 0
135} 144}
136 145
137# @FUNCTION: append-cppflags 146# @FUNCTION: append-cppflags
138# @USAGE: <flags> 147# @USAGE: <flags>
139# @DESCRIPTION: 148# @DESCRIPTION:
140# Add extra <flags> to the current CPPFLAGS. 149# Add extra <flags> to the current CPPFLAGS.
141append-cppflags() { 150append-cppflags() {
142 [[ -z $* ]] && return 0 151 [[ $# -eq 0 ]] && return 0
143 export CPPFLAGS="${CPPFLAGS} $*" 152 export CPPFLAGS+=" $*"
144 return 0 153 return 0
145} 154}
146 155
147# @FUNCTION: append-cflags 156# @FUNCTION: append-cflags
148# @USAGE: <flags> 157# @USAGE: <flags>
149# @DESCRIPTION: 158# @DESCRIPTION:
150# Add extra <flags> to the current CFLAGS. 159# Add extra <flags> to the current CFLAGS. If a flag might not be supported
160# with different compilers (or versions), then use test-flags-CC like so:
161# @CODE
162# append-cflags $(test-flags-CC -funky-flag)
163# @CODE
151append-cflags() { 164append-cflags() {
152 [[ -z $* ]] && return 0 165 [[ $# -eq 0 ]] && return 0
166 # Do not do automatic flag testing ourselves. #417047
153 export CFLAGS="${CFLAGS} $*" 167 export CFLAGS+=" $*"
154 return 0 168 return 0
155} 169}
156 170
157# @FUNCTION: append-cxxflags 171# @FUNCTION: append-cxxflags
158# @USAGE: <flags> 172# @USAGE: <flags>
159# @DESCRIPTION: 173# @DESCRIPTION:
160# Add extra <flags> to the current CXXFLAGS. 174# Add extra <flags> to the current CXXFLAGS. If a flag might not be supported
175# with different compilers (or versions), then use test-flags-CXX like so:
176# @CODE
177# append-cxxflags $(test-flags-CXX -funky-flag)
178# @CODE
161append-cxxflags() { 179append-cxxflags() {
162 [[ -z $* ]] && return 0 180 [[ $# -eq 0 ]] && return 0
181 # Do not do automatic flag testing ourselves. #417047
163 export CXXFLAGS="${CXXFLAGS} $*" 182 export CXXFLAGS+=" $*"
164 return 0 183 return 0
165} 184}
166 185
167# @FUNCTION: append-fflags 186# @FUNCTION: append-fflags
168# @USAGE: <flags> 187# @USAGE: <flags>
169# @DESCRIPTION: 188# @DESCRIPTION:
170# Add extra <flags> to the current {F,FC}FLAGS. 189# Add extra <flags> to the current {F,FC}FLAGS. If a flag might not be supported
190# with different compilers (or versions), then use test-flags-F77 like so:
191# @CODE
192# append-fflags $(test-flags-F77 -funky-flag)
193# @CODE
171append-fflags() { 194append-fflags() {
172 [[ -z $* ]] && return 0 195 [[ $# -eq 0 ]] && return 0
196 # Do not do automatic flag testing ourselves. #417047
173 export FFLAGS="${FFLAGS} $*" 197 export FFLAGS+=" $*"
174 export FCFLAGS="${FCFLAGS} $*" 198 export FCFLAGS+=" $*"
175 return 0 199 return 0
176} 200}
177 201
178# @FUNCTION: append-lfs-flags 202# @FUNCTION: append-lfs-flags
179# @DESCRIPTION: 203# @DESCRIPTION:
180# Add flags that enable Large File Support. 204# Add flags that enable Large File Support.
181append-lfs-flags() { 205append-lfs-flags() {
182 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 206 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
207 # 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 208 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
209}
210
211# @FUNCTION: append-ldflags
212# @USAGE: <flags>
213# @DESCRIPTION:
214# Add extra <flags> to the current LDFLAGS.
215append-ldflags() {
216 [[ $# -eq 0 ]] && return 0
217 local flag
218 for flag in "$@"; do
219 [[ ${flag} == -l* ]] && \
220 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
221 done
222
223 export LDFLAGS="${LDFLAGS} $*"
224 return 0
184} 225}
185 226
186# @FUNCTION: append-flags 227# @FUNCTION: append-flags
187# @USAGE: <flags> 228# @USAGE: <flags>
188# @DESCRIPTION: 229# @DESCRIPTION:
189# Add extra <flags> to your current {C,CXX,F,FC}FLAGS. 230# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
190append-flags() { 231append-flags() {
191 [[ -z $* ]] && return 0 232 [[ $# -eq 0 ]] && return 0
233 case " $* " in
234 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
235 *' '-L*|\
236 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
237 esac
192 append-cflags "$@" 238 append-cflags "$@"
193 append-cxxflags "$@" 239 append-cxxflags "$@"
194 append-fflags "$@" 240 append-fflags "$@"
195 return 0 241 return 0
196} 242}
198# @FUNCTION: replace-flags 244# @FUNCTION: replace-flags
199# @USAGE: <old> <new> 245# @USAGE: <old> <new>
200# @DESCRIPTION: 246# @DESCRIPTION:
201# Replace the <old> flag with <new>. Accepts shell globs for <old>. 247# Replace the <old> flag with <new>. Accepts shell globs for <old>.
202replace-flags() { 248replace-flags() {
203 [[ $# != 2 ]] \
204 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 249 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
205 && die "replace-flags takes 2 arguments, not $#"
206 250
207 local f fset 251 local f var new
208 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS 252 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 253 # Looping over the flags instead of using a global
212 # substitution ensures that we're working with flag atoms. 254 # substitution ensures that we're working with flag atoms.
213 # Otherwise globs like -O* have the potential to wipe out the 255 # Otherwise globs like -O* have the potential to wipe out the
214 # list of flags. 256 # list of flags.
257 new=()
215 for f in ${!fset}; do 258 for f in ${!var} ; do
216 # Note this should work with globs like -O* 259 # Note this should work with globs like -O*
217 [[ ${f} == ${1} ]] && f=${2} 260 [[ ${f} == ${1} ]] && f=${2}
218 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 261 new+=( "${f}" )
219 done 262 done
220 eval export ${fset}=\${new_${fset}\[*]} 263 eval export ${var}=\""${new[*]}"\"
221 done 264 done
222 265
223 return 0 266 return 0
224} 267}
225 268
240 done 283 done
241 return 0 284 return 0
242} 285}
243 286
244_is_flagq() { 287_is_flagq() {
245 local x 288 local x var
289 eval var=\""\${$1[*]}"\"
246 for x in ${!1} ; do 290 for x in ${var} ; do
247 [[ ${x} == $2 ]] && return 0 291 [[ ${x} == $2 ]] && return 0
248 done 292 done
249 return 1 293 return 1
250} 294}
251 295
253# @USAGE: <flag> 297# @USAGE: <flag>
254# @DESCRIPTION: 298# @DESCRIPTION:
255# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs. 299# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
256is-flagq() { 300is-flagq() {
257 [[ -n $2 ]] && die "Usage: is-flag <flag>" 301 [[ -n $2 ]] && die "Usage: is-flag <flag>"
258 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1 302
303 local var
304 for var in $(all-flag-vars) ; do
305 _is_flagq ${var} "$1" && return 0
306 done
307 return 1
259} 308}
260 309
261# @FUNCTION: is-flag 310# @FUNCTION: is-flag
262# @USAGE: <flag> 311# @USAGE: <flag>
263# @DESCRIPTION: 312# @DESCRIPTION:
294 343
295 # save the original -mfpmath flag 344 # save the original -mfpmath flag
296 orig_mfpmath=$(get-flag -mfpmath) 345 orig_mfpmath=$(get-flag -mfpmath)
297 # get the value of the current -mfpmath flag 346 # get the value of the current -mfpmath flag
298 new_math=$(get-flag mfpmath) 347 new_math=$(get-flag mfpmath)
348 # convert "both" to something we can filter
349 new_math=${new_math/both/387,sse}
299 new_math=" ${new_math//,/ } " 350 new_math=" ${new_math//[,+]/ } "
300 # figure out which math values are to be removed 351 # figure out which math values are to be removed
301 prune_math="" 352 prune_math=""
302 for prune_math in "$@" ; do 353 for prune_math in "$@" ; do
303 new_math=${new_math/ ${prune_math} / } 354 new_math=${new_math/ ${prune_math} / }
304 done 355 done
317 return 0 368 return 0
318} 369}
319 370
320# @FUNCTION: strip-flags 371# @FUNCTION: strip-flags
321# @DESCRIPTION: 372# @DESCRIPTION:
322# Strip C[XX]FLAGS of everything except known good/safe flags. 373# Strip *FLAGS of everything except known good/safe flags. This runs over all
374# flags returned by all_flag_vars().
323strip-flags() { 375strip-flags() {
324 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS 376 local x y var
325 377
326 setup-allowed-flags 378 setup-allowed-flags
327 379
328 local NEW_CFLAGS=""
329 local NEW_CXXFLAGS=""
330 local NEW_FFLAGS=""
331 local NEW_FCFLAGS=""
332
333 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
334 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
335 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
336 fi
337
338 set -f # disable pathname expansion 380 set -f # disable pathname expansion
339 381
340 for x in ${CFLAGS}; do 382 for var in $(all-flag-vars) ; do
383 local new=()
384
385 for x in ${!var} ; do
386 local flag=${x%%=*}
341 for y in ${ALLOWED_FLAGS}; do 387 for y in ${ALLOWED_FLAGS} ; do
342 flag=${x%%=*}
343 if [ "${flag%%${y}}" = "" ] ; then 388 if [[ -z ${flag%%${y}} ]] ; then
344 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 389 new+=( "${x}" )
345 break 390 break
346 fi 391 fi
347 done 392 done
348 done 393 done
349 394
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} ${x}"
375 break
376 fi
377 done
378 done
379
380 # In case we filtered out all optimization flags fallback to -O2 395 # In case we filtered out all optimization flags fallback to -O2
381 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 396 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
382 NEW_CFLAGS="${NEW_CFLAGS} -O2" 397 new+=( -O2 )
383 fi 398 fi
384 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 399
385 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 400 if [[ ${!var} != "${new[*]}" ]] ; then
401 einfo "strip-flags: ${var}: changed '${!var}' to '${new[*]}'"
386 fi 402 fi
387 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then 403 eval export ${var}=\""${new[*]}"\"
388 NEW_FFLAGS="${NEW_FFLAGS} -O2" 404 done
389 fi
390 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
391 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
392 fi
393 405
394 set +f # re-enable pathname expansion 406 set +f # re-enable pathname expansion
395 407
396 export CFLAGS="${NEW_CFLAGS}"
397 export CXXFLAGS="${NEW_CXXFLAGS}"
398 export FFLAGS="${NEW_FFLAGS}"
399 export FCFLAGS="${NEW_FCFLAGS}"
400 return 0 408 return 0
401} 409}
402 410
403test-flag-PROG() { 411test-flag-PROG() {
404 local comp=$1 412 local comp=$1
405 local flags="$2" 413 local lang=$2
414 local flag=$3
406 415
407 [[ -z ${comp} || -z ${flags} ]] && \ 416 [[ -z ${comp} || -z ${flag} ]] && return 1
408 return 1
409 417
418 # use -c so we can test the assembler as well
410 local PROG=$(tc-get${comp}) 419 local PROG=$(tc-get${comp})
420 if ${PROG} -c -o /dev/null -x${lang} - < /dev/null > /dev/null 2>&1 ; then
411 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 421 ${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \
412 > /dev/null 2>&1 422 > /dev/null 2>&1
423 else
424 ${PROG} "${flag}" -c -o /dev/null /dev/null > /dev/null 2>&1
425 fi
413} 426}
414 427
415# @FUNCTION: test-flag-CC 428# @FUNCTION: test-flag-CC
416# @USAGE: <flag> 429# @USAGE: <flag>
417# @DESCRIPTION: 430# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the C compiler, else returns shell false. 431# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
419test-flag-CC() { test-flag-PROG "CC" "$1"; } 432test-flag-CC() { test-flag-PROG "CC" c "$1"; }
420 433
421# @FUNCTION: test-flag-CXX 434# @FUNCTION: test-flag-CXX
422# @USAGE: <flag> 435# @USAGE: <flag>
423# @DESCRIPTION: 436# @DESCRIPTION:
424# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false. 437# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
425test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 438test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
426 439
427# @FUNCTION: test-flag-F77 440# @FUNCTION: test-flag-F77
428# @USAGE: <flag> 441# @USAGE: <flag>
429# @DESCRIPTION: 442# @DESCRIPTION:
430# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false. 443# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
431test-flag-F77() { test-flag-PROG "F77" "$1"; } 444test-flag-F77() { test-flag-PROG "F77" f77 "$1"; }
432 445
433# @FUNCTION: test-flag-FC 446# @FUNCTION: test-flag-FC
434# @USAGE: <flag> 447# @USAGE: <flag>
435# @DESCRIPTION: 448# @DESCRIPTION:
436# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false. 449# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
437test-flag-FC() { test-flag-PROG "FC" "$1"; } 450test-flag-FC() { test-flag-PROG "FC" f95 "$1"; }
438 451
439test-flags-PROG() { 452test-flags-PROG() {
440 local comp=$1 453 local comp=$1
441 local flags 454 local flags=()
442 local x 455 local x
443 456
444 shift 457 shift
445 458
446 [[ -z ${comp} ]] && return 1 459 [[ -z ${comp} ]] && return 1
447 460
448 x="" 461 for x ; do
449 for x in "$@" ; do
450 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 462 test-flag-${comp} "${x}" && flags+=( "${x}" )
451 done 463 done
452 464
453 echo "${flags}" 465 echo "${flags[*]}"
454 466
455 # Just bail if we dont have any flags 467 # Just bail if we dont have any flags
456 [[ -n ${flags} ]] 468 [[ ${#flags[@]} -gt 0 ]]
457} 469}
458 470
459# @FUNCTION: test-flags-CC 471# @FUNCTION: test-flags-CC
460# @USAGE: <flags> 472# @USAGE: <flags>
461# @DESCRIPTION: 473# @DESCRIPTION:
484# @USAGE: <flags> 496# @USAGE: <flags>
485# @DESCRIPTION: 497# @DESCRIPTION:
486# Short-hand that should hopefully work for both C and C++ compiler, but 498# Short-hand that should hopefully work for both C and C++ compiler, but
487# its really only present due to the append-flags() abomination. 499# its really only present due to the append-flags() abomination.
488test-flags() { test-flags-CC "$@"; } 500test-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}
498 501
499# @FUNCTION: test_version_info 502# @FUNCTION: test_version_info
500# @USAGE: <version> 503# @USAGE: <version>
501# @DESCRIPTION: 504# @DESCRIPTION:
502# Returns shell true if the current C compiler version matches <version>, else returns shell false. 505# Returns shell true if the current C compiler version matches <version>, else returns shell false.
522# @FUNCTION: get-flag 525# @FUNCTION: get-flag
523# @USAGE: <flag> 526# @USAGE: <flag>
524# @DESCRIPTION: 527# @DESCRIPTION:
525# Find and echo the value for a particular flag. Accepts shell globs. 528# Find and echo the value for a particular flag. Accepts shell globs.
526get-flag() { 529get-flag() {
527 local f findflag="$1" 530 local f var findflag="$1"
528 531
529 # this code looks a little flaky but seems to work for 532 # this code looks a little flaky but seems to work for
530 # everything we want ... 533 # everything we want ...
531 # for example, if CFLAGS="-march=i686": 534 # for example, if CFLAGS="-march=i686":
532 # `get-flag -march` == "-march=i686" 535 # `get-flag -march` == "-march=i686"
533 # `get-flag march` == "i686" 536 # `get-flag march` == "i686"
534 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do 537 for var in $(all-flag-vars) ; do
538 for f in ${!var} ; do
535 if [ "${f/${findflag}}" != "${f}" ] ; then 539 if [ "${f/${findflag}}" != "${f}" ] ; then
536 printf "%s\n" "${f/-${findflag}=}" 540 printf "%s\n" "${f/-${findflag}=}"
537 return 0 541 return 0
538 fi 542 fi
543 done
539 done 544 done
540 return 1 545 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) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
601 gcc-specs-ssp
602} 546}
603 547
604# @FUNCTION: has_m64 548# @FUNCTION: has_m64
605# @DESCRIPTION: 549# @DESCRIPTION:
606# This doesn't test if the flag is accepted, it tests if the flag actually 550# This doesn't test if the flag is accepted, it tests if the flag actually
607# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works 551# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
608# return code is 0, else the return code is 1. 552# return code is 0, else the return code is 1.
609has_m64() { 553has_m64() {
554 eqawarn "${FUNCNAME}: don't use this anymore"
555
610 # this doesnt test if the flag is accepted, it tests if the flag 556 # 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! 557 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
612 # please dont replace this function with test_flag in some future 558 # please dont replace this function with test_flag in some future
613 # clean-up! 559 # clean-up!
614 560
620 rm -f "${temp}".c 566 rm -f "${temp}".c
621 [[ ${ret} != 1 ]] && return 0 567 [[ ${ret} != 1 ]] && return 0
622 return 1 568 return 1
623} 569}
624 570
625# @FUNCTION: has_m32
626# @DESCRIPTION:
627# This doesn't test if the flag is accepted, it tests if the flag actually
628# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
629# code is 0, else return code is 1.
630has_m32() { 571has_m32() {
631 # this doesnt test if the flag is accepted, it tests if the flag 572 die "${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} 573}
647 574
648# @FUNCTION: replace-sparc64-flags 575# @FUNCTION: replace-sparc64-flags
649# @DESCRIPTION: 576# @DESCRIPTION:
650# Sets mcpu to v8 and uses the original value as mtune if none specified. 577# Sets mcpu to v8 and uses the original value as mtune if none specified.
675} 602}
676 603
677# @FUNCTION: append-libs 604# @FUNCTION: append-libs
678# @USAGE: <libs> 605# @USAGE: <libs>
679# @DESCRIPTION: 606# @DESCRIPTION:
680# Add extra <libs> to the current LIBS. 607# Add extra <libs> to the current LIBS. All arguments should be prefixed with
608# either -l or -L. For compatibility, if arguments are not prefixed as
609# options, they are given a -l prefix automatically.
681append-libs() { 610append-libs() {
682 [[ -z $* ]] && return 0 611 [[ $# -eq 0 ]] && return 0
683 local flag 612 local flag
684 for flag in "$@"; do 613 for flag in "$@"; do
685 [[ ${flag} == -l* ]] && flag=${flag#-l} 614 if [[ -z "${flag// }" ]]; then
615 eqawarn "Appending an empty argument to LIBS is invalid! Skipping."
616 continue
617 fi
618 case $flag in
619 -[lL]*)
620 export LIBS="${LIBS} ${flag}"
621 ;;
622 -*)
623 eqawarn "Appending non-library to LIBS (${flag}); Other linker flags should be passed via LDFLAGS"
624 export LIBS="${LIBS} ${flag}"
625 ;;
626 *)
686 export LIBS="${LIBS} -l${flag}" 627 export LIBS="${LIBS} -l${flag}"
628 esac
687 done 629 done
688 630
689 return 0
690}
691
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 0 631 return 0
715} 632}
716 633
717# @FUNCTION: raw-ldflags 634# @FUNCTION: raw-ldflags
718# @USAGE: <flags> 635# @USAGE: [flags]
719# @DESCRIPTION: 636# @DESCRIPTION:
720# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 637# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
721# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 638# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
722# to gcc where it needs the '-Wl,'. 639# to gcc where it needs the '-Wl,'.
640#
641# If no flags are specified, then default to ${LDFLAGS}.
723raw-ldflags() { 642raw-ldflags() {
724 local x input="$@" 643 local x input="$@"
725 [[ -z ${input} ]] && input=${LDFLAGS} 644 [[ -z ${input} ]] && input=${LDFLAGS}
726 set -- 645 set --
727 for x in ${input} ; do 646 for x in ${input} ; do
647 case ${x} in
648 -Wl,*)
728 x=${x#-Wl,} 649 x=${x#-Wl,}
729 set -- "$@" ${x//,/ } 650 set -- "$@" ${x//,/ }
651 ;;
652 *) # Assume it's a compiler driver flag, so throw it away #441808
653 ;;
654 esac
730 done 655 done
731 echo "$@" 656 echo "$@"
732} 657}
733 658
734# @FUNCTION: no-as-needed 659# @FUNCTION: no-as-needed
738 *GNU*) # GNU ld 663 *GNU*) # GNU ld
739 echo "-Wl,--no-as-needed" ;; 664 echo "-Wl,--no-as-needed" ;;
740 esac 665 esac
741} 666}
742 667
743# Some tests for when we screw with things and want to make 668fi
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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