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Revision 1.205 - (hide annotations) (download)
Wed May 6 07:04:53 2015 UTC (2 weeks, 3 days ago) by vapier
Branch: MAIN
CVS Tags: HEAD
Changes since 1.204: +12 -7 lines
make flag testing work for clang too crbug.com/474652

1 dirtyepic 1.196 # Copyright 1999-2014 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.205 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.204 2014/12/31 08:26:48 vapier Exp $
4 vapier 1.121
5     # @ECLASS: flag-o-matic.eclass
6     # @MAINTAINER:
7     # toolchain@gentoo.org
8     # @BLURB: common functions to manipulate and query toolchain flags
9     # @DESCRIPTION:
10     # This eclass contains a suite of functions to help developers sanely
11     # and safely manage toolchain flags in their builds.
12 vapier 1.63
13 ulm 1.201 if [[ -z ${_FLAG_O_MATIC_ECLASS} ]]; then
14     _FLAG_O_MATIC_ECLASS=1
15 vapier 1.160
16 eradicator 1.80 inherit eutils toolchain-funcs multilib
17 vapier 1.72
18 vapier 1.167 # Return all the flag variables that our high level funcs operate on.
19     all-flag-vars() {
20 blueness 1.169 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
21 vapier 1.167 }
22    
23 grobian 1.176 # {C,CPP,CXX,CCAS,F,FC,LD}FLAGS that we allow in strip-flags
24 vapier 1.117 # Note: shell globs and character lists are allowed
25 vapier 1.36 setup-allowed-flags() {
26 dirtyepic 1.163 ALLOWED_FLAGS="-pipe"
27 rhill 1.199 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -Og -mcpu -march -mtune"
28 vapier 1.204 ALLOWED_FLAGS+=" -fstack-protector* -fsanitize=*"
29 dirtyepic 1.163 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
30 vapier 1.203 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -nopie -fno-unit-at-a-time"
31 rhill 1.199 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gdwarf-* gstabs -gstabs+"
32 mgorny 1.191 ALLOWED_FLAGS+=" -fno-ident -fpermissive -frecord-gcc-switches"
33 dirtyepic 1.196 ALLOWED_FLAGS+=" -fdiagnostics*"
34 dirtyepic 1.163 ALLOWED_FLAGS+=" -W* -w"
35    
36 vapier 1.65 # allow a bunch of flags that negate features / control ABI
37 rhill 1.199 ALLOWED_FLAGS+=" -fno-stack-protector* -fabi-version=* \
38 dirtyepic 1.163 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
39 dirtyepic 1.192 -fno-omit-frame-pointer -fno-builtin*"
40 dirtyepic 1.163 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
41     -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
42     -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
43     -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
44 vapier 1.87 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
45 dirtyepic 1.149 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
46 dirtyepic 1.163 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
47     -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
48     -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
49 vapier 1.185 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi \
50 kumba 1.202 -mfix-r10000 -mno-fix-r10000 -D* -U*"
51 vapier 1.135
52 dirtyepic 1.148 # 4.5
53 dirtyepic 1.163 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
54 dirtyepic 1.149 # 4.6
55 dirtyepic 1.163 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
56 dirtyepic 1.175 # 4.7
57     ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
58 dirtyepic 1.196 # 4.8
59 tommy 1.197 ALLOWED_FLAGS+=" -mno-fxsr -mno-rtm -mno-xsave -mno-xsaveopt"
60 dirtyepic 1.196 # 4.9
61 tommy 1.197 ALLOWED_FLAGS+=" -mno-avx512cd -mno-avx512er -mno-avx512f -mno-avx512pf -mno-sha"
62 dirtyepic 1.148
63 grobian 1.176 # CPPFLAGS and LDFLAGS
64     ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
65    
66 dirtyepic 1.163 export ALLOWED_FLAGS
67 vapier 1.36 return 0
68 aliz 1.24 }
69 verwilst 1.13
70 kevquinn 1.105 # inverted filters for hardened compiler. This is trying to unpick
71     # the hardened compiler defaults.
72     _filter-hardened() {
73     local f
74     for f in "$@" ; do
75     case "${f}" in
76     # Ideally we should only concern ourselves with PIE flags,
77     # not -fPIC or -fpic, but too many places filter -fPIC without
78     # thinking about -fPIE.
79     -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
80     gcc-specs-pie || continue
81     is-flagq -nopie || append-flags -nopie;;
82     -fstack-protector)
83     gcc-specs-ssp || continue
84 gengor 1.131 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
85 kevquinn 1.105 -fstack-protector-all)
86     gcc-specs-ssp-to-all || continue
87 gengor 1.131 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 gengor 1.128 -fno-strict-overflow)
89     gcc-specs-nostrict || continue
90 gengor 1.131 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
91 solar 1.27 esac
92     done
93 kevquinn 1.105 }
94    
95     # Remove occurrences of strings from variable given in $1
96     # Strings removed are matched as globs, so for example
97     # '-O*' would remove -O1, -O2 etc.
98     _filter-var() {
99 vapier 1.167 local f x var=$1 new=()
100     shift
101 vapier 1.36
102 vapier 1.167 for f in ${!var} ; do
103     for x in "$@" ; do
104 kevquinn 1.105 # Note this should work with globs like -O*
105     [[ ${f} == ${x} ]] && continue 2
106 agriffis 1.61 done
107 vapier 1.167 new+=( "${f}" )
108 verwilst 1.1 done
109 vapier 1.167 eval export ${var}=\""${new[*]}"\"
110 kevquinn 1.105 }
111 agriffis 1.61
112 vapier 1.121 # @FUNCTION: filter-flags
113     # @USAGE: <flags>
114     # @DESCRIPTION:
115 blueness 1.169 # Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
116 kevquinn 1.105 filter-flags() {
117     _filter-hardened "$@"
118 vapier 1.164 local v
119 vapier 1.167 for v in $(all-flag-vars) ; do
120     _filter-var ${v} "$@"
121 vapier 1.164 done
122 vapier 1.36 return 0
123 verwilst 1.2 }
124    
125 vapier 1.121 # @FUNCTION: filter-lfs-flags
126     # @DESCRIPTION:
127     # Remove flags that enable Large File Support.
128 vapier 1.40 filter-lfs-flags() {
129 vapier 1.154 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
130 vapier 1.153 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
131     # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
132     # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
133     # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
134 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135     }
136    
137 jlec 1.171 # @FUNCTION: filter-ldflags
138     # @USAGE: <flags>
139     # @DESCRIPTION:
140     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
141     filter-ldflags() {
142     _filter-var LDFLAGS "$@"
143     return 0
144     }
145    
146 vapier 1.121 # @FUNCTION: append-cppflags
147     # @USAGE: <flags>
148     # @DESCRIPTION:
149     # Add extra <flags> to the current CPPFLAGS.
150 vapier 1.118 append-cppflags() {
151 vapier 1.158 [[ $# -eq 0 ]] && return 0
152 vapier 1.189 export CPPFLAGS+=" $*"
153 vapier 1.118 return 0
154     }
155    
156 vapier 1.136 # @FUNCTION: append-cflags
157     # @USAGE: <flags>
158     # @DESCRIPTION:
159 vapier 1.189 # 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
164 mr_bones_ 1.137 append-cflags() {
165 vapier 1.158 [[ $# -eq 0 ]] && return 0
166 vapier 1.189 # Do not do automatic flag testing ourselves. #417047
167     export CFLAGS+=" $*"
168 vapier 1.136 return 0
169     }
170    
171 gengor 1.132 # @FUNCTION: append-cxxflags
172     # @USAGE: <flags>
173     # @DESCRIPTION:
174 vapier 1.189 # 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
179 gengor 1.132 append-cxxflags() {
180 vapier 1.158 [[ $# -eq 0 ]] && return 0
181 vapier 1.189 # Do not do automatic flag testing ourselves. #417047
182     export CXXFLAGS+=" $*"
183 gengor 1.132 return 0
184     }
185    
186 dberkholz 1.124 # @FUNCTION: append-fflags
187     # @USAGE: <flags>
188     # @DESCRIPTION:
189 vapier 1.189 # 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
194 dberkholz 1.124 append-fflags() {
195 vapier 1.158 [[ $# -eq 0 ]] && return 0
196 vapier 1.189 # Do not do automatic flag testing ourselves. #417047
197     export FFLAGS+=" $*"
198     export FCFLAGS+=" $*"
199 dberkholz 1.124 return 0
200     }
201    
202 vapier 1.121 # @FUNCTION: append-lfs-flags
203     # @DESCRIPTION:
204     # Add flags that enable Large File Support.
205 vapier 1.48 append-lfs-flags() {
206 vapier 1.154 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
207 vapier 1.155 # see comments in filter-lfs-flags func for meaning of these
208 vapier 1.118 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
209 vapier 1.48 }
210    
211 jlec 1.171 # @FUNCTION: append-ldflags
212     # @USAGE: <flags>
213     # @DESCRIPTION:
214     # Add extra <flags> to the current LDFLAGS.
215     append-ldflags() {
216     [[ $# -eq 0 ]] && return 0
217     local flag
218     for flag in "$@"; do
219     [[ ${flag} == -l* ]] && \
220 vapier 1.177 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
221 jlec 1.171 done
222    
223     export LDFLAGS="${LDFLAGS} $*"
224     return 0
225     }
226    
227 vapier 1.121 # @FUNCTION: append-flags
228     # @USAGE: <flags>
229     # @DESCRIPTION:
230 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
231 vapier 1.18 append-flags() {
232 vapier 1.158 [[ $# -eq 0 ]] && return 0
233 vapier 1.170 case " $* " in
234     *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
235 vapier 1.172 *' '-L*|\
236 vapier 1.173 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
237 vapier 1.170 esac
238 vapier 1.136 append-cflags "$@"
239 vapier 1.138 append-cxxflags "$@"
240 vapier 1.136 append-fflags "$@"
241 vapier 1.28 return 0
242 verwilst 1.1 }
243    
244 vapier 1.121 # @FUNCTION: replace-flags
245     # @USAGE: <old> <new>
246     # @DESCRIPTION:
247     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
248 vapier 1.18 replace-flags() {
249 vapier 1.167 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
250 vapier 1.93
251 vapier 1.167 local f var new
252     for var in $(all-flag-vars) ; do
253 agriffis 1.64 # Looping over the flags instead of using a global
254     # substitution ensures that we're working with flag atoms.
255     # Otherwise globs like -O* have the potential to wipe out the
256     # list of flags.
257 vapier 1.167 new=()
258     for f in ${!var} ; do
259 agriffis 1.64 # Note this should work with globs like -O*
260     [[ ${f} == ${1} ]] && f=${2}
261 vapier 1.167 new+=( "${f}" )
262 agriffis 1.64 done
263 vapier 1.167 eval export ${var}=\""${new[*]}"\"
264 agriffis 1.64 done
265    
266 vapier 1.28 return 0
267 danarmak 1.7 }
268    
269 vapier 1.121 # @FUNCTION: replace-cpu-flags
270     # @USAGE: <old> <new>
271     # @DESCRIPTION:
272     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
273     # with flags that select the <new> cpu. Accepts shell globs for <old>.
274 vapier 1.37 replace-cpu-flags() {
275 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
276     while [ $# -gt 1 ] ; do
277 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
278 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
279 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
280     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
281     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
282     shift
283 vapier 1.37 done
284     return 0
285     }
286    
287 vapier 1.113 _is_flagq() {
288 vapier 1.179 local x var
289     eval var=\""\${$1[*]}"\"
290     for x in ${var} ; do
291 vapier 1.113 [[ ${x} == $2 ]] && return 0
292 kevquinn 1.105 done
293     return 1
294     }
295    
296 vapier 1.121 # @FUNCTION: is-flagq
297     # @USAGE: <flag>
298     # @DESCRIPTION:
299 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
300 vapier 1.113 is-flagq() {
301     [[ -n $2 ]] && die "Usage: is-flag <flag>"
302 vapier 1.167
303     local var
304     for var in $(all-flag-vars) ; do
305     _is_flagq ${var} "$1" && return 0
306     done
307     return 1
308 vapier 1.113 }
309    
310 vapier 1.121 # @FUNCTION: is-flag
311     # @USAGE: <flag>
312     # @DESCRIPTION:
313 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
314 danarmak 1.7 is-flag() {
315 vapier 1.113 is-flagq "$@" && echo true
316 kevquinn 1.105 }
317    
318 vapier 1.121 # @FUNCTION: is-ldflagq
319     # @USAGE: <flag>
320     # @DESCRIPTION:
321     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
322 kevquinn 1.105 is-ldflagq() {
323 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
324     _is_flagq LDFLAGS $1
325 verwilst 1.1 }
326 azarah 1.8
327 vapier 1.121 # @FUNCTION: is-ldflag
328     # @USAGE: <flag>
329     # @DESCRIPTION:
330     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
331 kevquinn 1.105 is-ldflag() {
332 vapier 1.113 is-ldflagq "$@" && echo true
333 kevquinn 1.105 }
334    
335 vapier 1.121 # @FUNCTION: filter-mfpmath
336     # @USAGE: <math types>
337     # @DESCRIPTION:
338     # Remove specified math types from the fpmath flag. For example, if the user
339     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
340     # -mfpmath=386.
341 vapier 1.36 filter-mfpmath() {
342 agriffis 1.58 local orig_mfpmath new_math prune_math
343    
344 vapier 1.36 # save the original -mfpmath flag
345 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
346 vapier 1.36 # get the value of the current -mfpmath flag
347 vapier 1.109 new_math=$(get-flag mfpmath)
348 vapier 1.188 # convert "both" to something we can filter
349     new_math=${new_math/both/387,sse}
350     new_math=" ${new_math//[,+]/ } "
351 vapier 1.36 # figure out which math values are to be removed
352 agriffis 1.58 prune_math=""
353 vapier 1.36 for prune_math in "$@" ; do
354 vapier 1.109 new_math=${new_math/ ${prune_math} / }
355 vapier 1.36 done
356 vapier 1.109 new_math=$(echo ${new_math})
357     new_math=${new_math// /,}
358 vapier 1.36
359 vapier 1.109 if [[ -z ${new_math} ]] ; then
360 vapier 1.36 # if we're removing all user specified math values are
361     # slated for removal, then we just filter the flag
362     filter-flags ${orig_mfpmath}
363     else
364     # if we only want to filter some of the user specified
365     # math values, then we replace the current flag
366     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
367     fi
368     return 0
369     }
370    
371 vapier 1.121 # @FUNCTION: strip-flags
372     # @DESCRIPTION:
373 grobian 1.176 # Strip *FLAGS of everything except known good/safe flags. This runs over all
374     # flags returned by all_flag_vars().
375 azarah 1.8 strip-flags() {
376 vapier 1.167 local x y var
377 agriffis 1.58
378 vapier 1.36 setup-allowed-flags
379    
380 agriffis 1.58 set -f # disable pathname expansion
381 azarah 1.8
382 vapier 1.167 for var in $(all-flag-vars) ; do
383     local new=()
384 azarah 1.8
385 vapier 1.167 for x in ${!var} ; do
386     local flag=${x%%=*}
387     for y in ${ALLOWED_FLAGS} ; do
388     if [[ -z ${flag%%${y}} ]] ; then
389     new+=( "${x}" )
390     break
391     fi
392     done
393 azarah 1.8 done
394 azarah 1.30
395 vapier 1.167 # In case we filtered out all optimization flags fallback to -O2
396 vapier 1.179 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
397 vapier 1.167 new+=( -O2 )
398     fi
399 dberkholz 1.124
400 vapier 1.190 if [[ ${!var} != "${new[*]}" ]] ; then
401     einfo "strip-flags: ${var}: changed '${!var}' to '${new[*]}'"
402     fi
403 vapier 1.167 eval export ${var}=\""${new[*]}"\"
404 dberkholz 1.124 done
405    
406 agriffis 1.58 set +f # re-enable pathname expansion
407 azarah 1.8
408 vapier 1.36 return 0
409 puggy 1.29 }
410    
411 azarah 1.96 test-flag-PROG() {
412     local comp=$1
413 vapier 1.182 local lang=$2
414     local flag=$3
415 azarah 1.96
416 vapier 1.168 [[ -z ${comp} || -z ${flag} ]] && return 1
417 azarah 1.96
418 vapier 1.205 local cmdline=(
419     $(tc-get${comp})
420     # Clang will warn about unknown gcc flags but exit 0.
421     # Need -Werror to force it to exit non-zero.
422     -Werror
423     # Use -c so we can test the assembler as well.
424     -c -o /dev/null
425     )
426     if "${cmdline[@]}" -x${lang} - </dev/null >/dev/null 2>&1 ; then
427     "${cmdline[@]}" "${flag}" -x${lang} - </dev/null >/dev/null 2>&1
428 jlec 1.186 else
429 vapier 1.205 "${cmdline[@]}" "${flag}" -c -o /dev/null /dev/null >/dev/null 2>&1
430 jlec 1.186 fi
431 azarah 1.96 }
432    
433 vapier 1.121 # @FUNCTION: test-flag-CC
434     # @USAGE: <flag>
435     # @DESCRIPTION:
436     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
437 vapier 1.182 test-flag-CC() { test-flag-PROG "CC" c "$1"; }
438 azarah 1.96
439 vapier 1.121 # @FUNCTION: test-flag-CXX
440     # @USAGE: <flag>
441     # @DESCRIPTION:
442     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
443 vapier 1.182 test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
444 azarah 1.96
445 dberkholz 1.124 # @FUNCTION: test-flag-F77
446     # @USAGE: <flag>
447     # @DESCRIPTION:
448     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
449 vapier 1.182 test-flag-F77() { test-flag-PROG "F77" f77 "$1"; }
450 dberkholz 1.124
451     # @FUNCTION: test-flag-FC
452     # @USAGE: <flag>
453     # @DESCRIPTION:
454     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
455 vapier 1.182 test-flag-FC() { test-flag-PROG "FC" f95 "$1"; }
456 dberkholz 1.124
457 azarah 1.99 test-flags-PROG() {
458     local comp=$1
459 vapier 1.183 local flags=()
460 azarah 1.96 local x
461 azarah 1.99
462     shift
463    
464 vapier 1.113 [[ -z ${comp} ]] && return 1
465 swegener 1.101
466 vapier 1.183 for x ; do
467     test-flag-${comp} "${x}" && flags+=( "${x}" )
468 azarah 1.96 done
469    
470 vapier 1.183 echo "${flags[*]}"
471 azarah 1.96
472 azarah 1.99 # Just bail if we dont have any flags
473 vapier 1.183 [[ ${#flags[@]} -gt 0 ]]
474 azarah 1.96 }
475    
476 vapier 1.121 # @FUNCTION: test-flags-CC
477     # @USAGE: <flags>
478     # @DESCRIPTION:
479     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
480 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
481    
482 vapier 1.121 # @FUNCTION: test-flags-CXX
483     # @USAGE: <flags>
484     # @DESCRIPTION:
485     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
486 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
487    
488 dberkholz 1.124 # @FUNCTION: test-flags-F77
489     # @USAGE: <flags>
490     # @DESCRIPTION:
491     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
492     test-flags-F77() { test-flags-PROG "F77" "$@"; }
493    
494     # @FUNCTION: test-flags-FC
495     # @USAGE: <flags>
496     # @DESCRIPTION:
497     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
498     test-flags-FC() { test-flags-PROG "FC" "$@"; }
499    
500 vapier 1.121 # @FUNCTION: test-flags
501     # @USAGE: <flags>
502     # @DESCRIPTION:
503 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
504 azarah 1.100 # its really only present due to the append-flags() abomination.
505 azarah 1.99 test-flags() { test-flags-CC "$@"; }
506    
507 vapier 1.121 # @FUNCTION: test_version_info
508     # @USAGE: <version>
509     # @DESCRIPTION:
510     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
511     # Accepts shell globs.
512 agriffis 1.58 test_version_info() {
513 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
514 agriffis 1.58 return 0
515     else
516     return 1
517     fi
518     }
519    
520 vapier 1.121 # @FUNCTION: strip-unsupported-flags
521     # @DESCRIPTION:
522 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
523 puggy 1.29 strip-unsupported-flags() {
524 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
525     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
526 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
527     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
528 azarah 1.8 }
529    
530 vapier 1.121 # @FUNCTION: get-flag
531     # @USAGE: <flag>
532     # @DESCRIPTION:
533     # Find and echo the value for a particular flag. Accepts shell globs.
534 vapier 1.10 get-flag() {
535 vapier 1.167 local f var findflag="$1"
536 agriffis 1.58
537 vapier 1.36 # this code looks a little flaky but seems to work for
538     # everything we want ...
539     # for example, if CFLAGS="-march=i686":
540 agriffis 1.58 # `get-flag -march` == "-march=i686"
541     # `get-flag march` == "i686"
542 vapier 1.167 for var in $(all-flag-vars) ; do
543     for f in ${!var} ; do
544     if [ "${f/${findflag}}" != "${f}" ] ; then
545     printf "%s\n" "${f/-${findflag}=}"
546     return 0
547     fi
548     done
549 vapier 1.10 done
550 vapier 1.28 return 1
551 joker 1.16 }
552    
553 vapier 1.121 # @FUNCTION: has_m64
554     # @DESCRIPTION:
555     # This doesn't test if the flag is accepted, it tests if the flag actually
556     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
557     # return code is 0, else the return code is 1.
558 lv 1.56 has_m64() {
559 vapier 1.166 eqawarn "${FUNCNAME}: don't use this anymore"
560    
561 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
562     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
563     # please dont replace this function with test_flag in some future
564     # clean-up!
565 swegener 1.101
566 vapier 1.72 local temp="$(emktemp)"
567 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
568 kugelfang 1.74 MY_CC=$(tc-getCC)
569 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
570 vapier 1.72 local ret=$?
571 azarah 1.96 rm -f "${temp}".c
572     [[ ${ret} != 1 ]] && return 0
573 lv 1.62 return 1
574 lv 1.56 }
575    
576     has_m32() {
577 vapier 1.166 die "${FUNCNAME}: don't use this anymore"
578 lv 1.56 }
579    
580 vapier 1.121 # @FUNCTION: replace-sparc64-flags
581     # @DESCRIPTION:
582     # Sets mcpu to v8 and uses the original value as mtune if none specified.
583 vapier 1.18 replace-sparc64-flags() {
584 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
585 joker 1.16
586 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
587 agriffis 1.58 for x in ${SPARC64_CPUS}; do
588 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
589     done
590 mr_bones_ 1.83 else
591 swegener 1.111 for x in ${SPARC64_CPUS}; do
592 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
593     done
594     fi
595 mr_bones_ 1.83
596     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
597 agriffis 1.58 for x in ${SPARC64_CPUS}; do
598 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
599     done
600     else
601 swegener 1.111 for x in ${SPARC64_CPUS}; do
602 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
603     done
604     fi
605 vapier 1.59
606     export CFLAGS CXXFLAGS
607 solar 1.27 }
608    
609 abcd 1.147 # @FUNCTION: append-libs
610     # @USAGE: <libs>
611     # @DESCRIPTION:
612 robbat2 1.195 # Add extra <libs> to the current LIBS. All arguments should be prefixed with
613     # either -l or -L. For compatibility, if arguments are not prefixed as
614 robbat2 1.194 # options, they are given a -l prefix automatically.
615 abcd 1.147 append-libs() {
616 vapier 1.158 [[ $# -eq 0 ]] && return 0
617 abcd 1.147 local flag
618     for flag in "$@"; do
619 robbat2 1.198 if [[ -z "${flag// }" ]]; then
620     eqawarn "Appending an empty argument to LIBS is invalid! Skipping."
621     continue
622     fi
623 robbat2 1.194 case $flag in
624 ulm 1.200 -[lL]*)
625 robbat2 1.194 export LIBS="${LIBS} ${flag}"
626     ;;
627 ulm 1.200 -*)
628 robbat2 1.194 eqawarn "Appending non-library to LIBS (${flag}); Other linker flags should be passed via LDFLAGS"
629     export LIBS="${LIBS} ${flag}"
630     ;;
631     *)
632     export LIBS="${LIBS} -l${flag}"
633     esac
634 abcd 1.147 done
635    
636     return 0
637     }
638    
639 vapier 1.121 # @FUNCTION: raw-ldflags
640 vapier 1.156 # @USAGE: [flags]
641 vapier 1.121 # @DESCRIPTION:
642 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
643     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
644     # to gcc where it needs the '-Wl,'.
645 vapier 1.156 #
646     # If no flags are specified, then default to ${LDFLAGS}.
647 vapier 1.102 raw-ldflags() {
648     local x input="$@"
649     [[ -z ${input} ]] && input=${LDFLAGS}
650     set --
651     for x in ${input} ; do
652 vapier 1.180 case ${x} in
653 vapier 1.181 -Wl,*)
654 vapier 1.180 x=${x#-Wl,}
655     set -- "$@" ${x//,/ }
656     ;;
657     *) # Assume it's a compiler driver flag, so throw it away #441808
658     ;;
659     esac
660 vapier 1.102 done
661     echo "$@"
662     }
663    
664 ssuominen 1.145 # @FUNCTION: no-as-needed
665     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
666     no-as-needed() {
667     case $($(tc-getLD) -v 2>&1 </dev/null) in
668     *GNU*) # GNU ld
669     echo "-Wl,--no-as-needed" ;;
670     esac
671     }
672 vapier 1.113
673 vapier 1.160 fi

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