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Revision 1.190 - (hide annotations) (download)
Sat Oct 12 19:50:02 2013 UTC (11 months, 2 weeks ago) by vapier
Branch: MAIN
Changes since 1.189: +4 -1 lines
strip-flags: log changes when they happen for user to see #487104

1 jlec 1.187 # Copyright 1999-2013 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.190 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.189 2013/09/30 06:39:56 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 vapier 1.160 if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14     ___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15    
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     ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
28     ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
29     ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
30     ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
31     ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
32     ALLOWED_FLAGS+=" -fno-ident -fpermissive"
33     ALLOWED_FLAGS+=" -W* -w"
34    
35 vapier 1.65 # allow a bunch of flags that negate features / control ABI
36 dirtyepic 1.163 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
37     -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38     -fno-omit-frame-pointer"
39     ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
40     -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41     -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
42     -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
43 vapier 1.87 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
44 dirtyepic 1.149 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
45 dirtyepic 1.163 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
46     -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
47     -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
48 vapier 1.185 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi \
49 dirtyepic 1.174 -D* -U*"
50 vapier 1.135
51 dirtyepic 1.148 # 4.5
52 dirtyepic 1.163 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
53 dirtyepic 1.149 # 4.6
54 dirtyepic 1.163 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
55 dirtyepic 1.175 # 4.7
56     ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
57 dirtyepic 1.148
58 grobian 1.176 # CPPFLAGS and LDFLAGS
59     ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
60    
61 dirtyepic 1.163 export ALLOWED_FLAGS
62 vapier 1.36 return 0
63 aliz 1.24 }
64 verwilst 1.13
65 kevquinn 1.105 # inverted filters for hardened compiler. This is trying to unpick
66     # the hardened compiler defaults.
67     _filter-hardened() {
68     local f
69     for f in "$@" ; do
70     case "${f}" in
71     # Ideally we should only concern ourselves with PIE flags,
72     # not -fPIC or -fpic, but too many places filter -fPIC without
73     # thinking about -fPIE.
74     -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
75     gcc-specs-pie || continue
76     is-flagq -nopie || append-flags -nopie;;
77     -fstack-protector)
78     gcc-specs-ssp || continue
79 gengor 1.131 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
80 kevquinn 1.105 -fstack-protector-all)
81     gcc-specs-ssp-to-all || continue
82 gengor 1.131 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
83 gengor 1.128 -fno-strict-overflow)
84     gcc-specs-nostrict || continue
85 gengor 1.131 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
86 solar 1.27 esac
87     done
88 kevquinn 1.105 }
89    
90     # Remove occurrences of strings from variable given in $1
91     # Strings removed are matched as globs, so for example
92     # '-O*' would remove -O1, -O2 etc.
93     _filter-var() {
94 vapier 1.167 local f x var=$1 new=()
95     shift
96 vapier 1.36
97 vapier 1.167 for f in ${!var} ; do
98     for x in "$@" ; do
99 kevquinn 1.105 # Note this should work with globs like -O*
100     [[ ${f} == ${x} ]] && continue 2
101 agriffis 1.61 done
102 vapier 1.167 new+=( "${f}" )
103 verwilst 1.1 done
104 vapier 1.167 eval export ${var}=\""${new[*]}"\"
105 kevquinn 1.105 }
106 agriffis 1.61
107 vapier 1.121 # @FUNCTION: filter-flags
108     # @USAGE: <flags>
109     # @DESCRIPTION:
110 blueness 1.169 # Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
111 kevquinn 1.105 filter-flags() {
112     _filter-hardened "$@"
113 vapier 1.164 local v
114 vapier 1.167 for v in $(all-flag-vars) ; do
115     _filter-var ${v} "$@"
116 vapier 1.164 done
117 vapier 1.36 return 0
118 verwilst 1.2 }
119    
120 vapier 1.121 # @FUNCTION: filter-lfs-flags
121     # @DESCRIPTION:
122     # Remove flags that enable Large File Support.
123 vapier 1.40 filter-lfs-flags() {
124 vapier 1.154 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
125 vapier 1.153 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
126     # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
127     # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
128     # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
129 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
130     }
131    
132 jlec 1.171 # @FUNCTION: filter-ldflags
133     # @USAGE: <flags>
134     # @DESCRIPTION:
135     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
136     filter-ldflags() {
137     _filter-var LDFLAGS "$@"
138     return 0
139     }
140    
141 vapier 1.121 # @FUNCTION: append-cppflags
142     # @USAGE: <flags>
143     # @DESCRIPTION:
144     # Add extra <flags> to the current CPPFLAGS.
145 vapier 1.118 append-cppflags() {
146 vapier 1.158 [[ $# -eq 0 ]] && return 0
147 vapier 1.189 export CPPFLAGS+=" $*"
148 vapier 1.118 return 0
149     }
150    
151 vapier 1.136 # @FUNCTION: append-cflags
152     # @USAGE: <flags>
153     # @DESCRIPTION:
154 vapier 1.189 # Add extra <flags> to the current CFLAGS. If a flag might not be supported
155     # with different compilers (or versions), then use test-flags-CC like so:
156     # @CODE
157     # append-cflags $(test-flags-CC -funky-flag)
158     # @CODE
159 mr_bones_ 1.137 append-cflags() {
160 vapier 1.158 [[ $# -eq 0 ]] && return 0
161 vapier 1.189 # Do not do automatic flag testing ourselves. #417047
162     export CFLAGS+=" $*"
163 vapier 1.136 return 0
164     }
165    
166 gengor 1.132 # @FUNCTION: append-cxxflags
167     # @USAGE: <flags>
168     # @DESCRIPTION:
169 vapier 1.189 # Add extra <flags> to the current CXXFLAGS. If a flag might not be supported
170     # with different compilers (or versions), then use test-flags-CXX like so:
171     # @CODE
172     # append-cxxflags $(test-flags-CXX -funky-flag)
173     # @CODE
174 gengor 1.132 append-cxxflags() {
175 vapier 1.158 [[ $# -eq 0 ]] && return 0
176 vapier 1.189 # Do not do automatic flag testing ourselves. #417047
177     export CXXFLAGS+=" $*"
178 gengor 1.132 return 0
179     }
180    
181 dberkholz 1.124 # @FUNCTION: append-fflags
182     # @USAGE: <flags>
183     # @DESCRIPTION:
184 vapier 1.189 # Add extra <flags> to the current {F,FC}FLAGS. If a flag might not be supported
185     # with different compilers (or versions), then use test-flags-F77 like so:
186     # @CODE
187     # append-fflags $(test-flags-F77 -funky-flag)
188     # @CODE
189 dberkholz 1.124 append-fflags() {
190 vapier 1.158 [[ $# -eq 0 ]] && return 0
191 vapier 1.189 # Do not do automatic flag testing ourselves. #417047
192     export FFLAGS+=" $*"
193     export FCFLAGS+=" $*"
194 dberkholz 1.124 return 0
195     }
196    
197 vapier 1.121 # @FUNCTION: append-lfs-flags
198     # @DESCRIPTION:
199     # Add flags that enable Large File Support.
200 vapier 1.48 append-lfs-flags() {
201 vapier 1.154 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
202 vapier 1.155 # see comments in filter-lfs-flags func for meaning of these
203 vapier 1.118 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
204 vapier 1.48 }
205    
206 jlec 1.171 # @FUNCTION: append-ldflags
207     # @USAGE: <flags>
208     # @DESCRIPTION:
209     # Add extra <flags> to the current LDFLAGS.
210     append-ldflags() {
211     [[ $# -eq 0 ]] && return 0
212     local flag
213     for flag in "$@"; do
214     [[ ${flag} == -l* ]] && \
215 vapier 1.177 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
216 jlec 1.171 done
217    
218     export LDFLAGS="${LDFLAGS} $*"
219     return 0
220     }
221    
222 vapier 1.121 # @FUNCTION: append-flags
223     # @USAGE: <flags>
224     # @DESCRIPTION:
225 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
226 vapier 1.18 append-flags() {
227 vapier 1.158 [[ $# -eq 0 ]] && return 0
228 vapier 1.170 case " $* " in
229     *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
230 vapier 1.172 *' '-L*|\
231 vapier 1.173 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
232 vapier 1.170 esac
233 vapier 1.136 append-cflags "$@"
234 vapier 1.138 append-cxxflags "$@"
235 vapier 1.136 append-fflags "$@"
236 vapier 1.28 return 0
237 verwilst 1.1 }
238    
239 vapier 1.121 # @FUNCTION: replace-flags
240     # @USAGE: <old> <new>
241     # @DESCRIPTION:
242     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
243 vapier 1.18 replace-flags() {
244 vapier 1.167 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
245 vapier 1.93
246 vapier 1.167 local f var new
247     for var in $(all-flag-vars) ; do
248 agriffis 1.64 # Looping over the flags instead of using a global
249     # substitution ensures that we're working with flag atoms.
250     # Otherwise globs like -O* have the potential to wipe out the
251     # list of flags.
252 vapier 1.167 new=()
253     for f in ${!var} ; do
254 agriffis 1.64 # Note this should work with globs like -O*
255     [[ ${f} == ${1} ]] && f=${2}
256 vapier 1.167 new+=( "${f}" )
257 agriffis 1.64 done
258 vapier 1.167 eval export ${var}=\""${new[*]}"\"
259 agriffis 1.64 done
260    
261 vapier 1.28 return 0
262 danarmak 1.7 }
263    
264 vapier 1.121 # @FUNCTION: replace-cpu-flags
265     # @USAGE: <old> <new>
266     # @DESCRIPTION:
267     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
268     # with flags that select the <new> cpu. Accepts shell globs for <old>.
269 vapier 1.37 replace-cpu-flags() {
270 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
271     while [ $# -gt 1 ] ; do
272 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
273 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
274 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
275     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
276     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
277     shift
278 vapier 1.37 done
279     return 0
280     }
281    
282 vapier 1.113 _is_flagq() {
283 vapier 1.179 local x var
284     eval var=\""\${$1[*]}"\"
285     for x in ${var} ; do
286 vapier 1.113 [[ ${x} == $2 ]] && return 0
287 kevquinn 1.105 done
288     return 1
289     }
290    
291 vapier 1.121 # @FUNCTION: is-flagq
292     # @USAGE: <flag>
293     # @DESCRIPTION:
294 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
295 vapier 1.113 is-flagq() {
296     [[ -n $2 ]] && die "Usage: is-flag <flag>"
297 vapier 1.167
298     local var
299     for var in $(all-flag-vars) ; do
300     _is_flagq ${var} "$1" && return 0
301     done
302     return 1
303 vapier 1.113 }
304    
305 vapier 1.121 # @FUNCTION: is-flag
306     # @USAGE: <flag>
307     # @DESCRIPTION:
308 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
309 danarmak 1.7 is-flag() {
310 vapier 1.113 is-flagq "$@" && echo true
311 kevquinn 1.105 }
312    
313 vapier 1.121 # @FUNCTION: is-ldflagq
314     # @USAGE: <flag>
315     # @DESCRIPTION:
316     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
317 kevquinn 1.105 is-ldflagq() {
318 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
319     _is_flagq LDFLAGS $1
320 verwilst 1.1 }
321 azarah 1.8
322 vapier 1.121 # @FUNCTION: is-ldflag
323     # @USAGE: <flag>
324     # @DESCRIPTION:
325     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
326 kevquinn 1.105 is-ldflag() {
327 vapier 1.113 is-ldflagq "$@" && echo true
328 kevquinn 1.105 }
329    
330 vapier 1.121 # @FUNCTION: filter-mfpmath
331     # @USAGE: <math types>
332     # @DESCRIPTION:
333     # Remove specified math types from the fpmath flag. For example, if the user
334     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
335     # -mfpmath=386.
336 vapier 1.36 filter-mfpmath() {
337 agriffis 1.58 local orig_mfpmath new_math prune_math
338    
339 vapier 1.36 # save the original -mfpmath flag
340 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
341 vapier 1.36 # get the value of the current -mfpmath flag
342 vapier 1.109 new_math=$(get-flag mfpmath)
343 vapier 1.188 # convert "both" to something we can filter
344     new_math=${new_math/both/387,sse}
345     new_math=" ${new_math//[,+]/ } "
346 vapier 1.36 # figure out which math values are to be removed
347 agriffis 1.58 prune_math=""
348 vapier 1.36 for prune_math in "$@" ; do
349 vapier 1.109 new_math=${new_math/ ${prune_math} / }
350 vapier 1.36 done
351 vapier 1.109 new_math=$(echo ${new_math})
352     new_math=${new_math// /,}
353 vapier 1.36
354 vapier 1.109 if [[ -z ${new_math} ]] ; then
355 vapier 1.36 # if we're removing all user specified math values are
356     # slated for removal, then we just filter the flag
357     filter-flags ${orig_mfpmath}
358     else
359     # if we only want to filter some of the user specified
360     # math values, then we replace the current flag
361     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
362     fi
363     return 0
364     }
365    
366 vapier 1.121 # @FUNCTION: strip-flags
367     # @DESCRIPTION:
368 grobian 1.176 # Strip *FLAGS of everything except known good/safe flags. This runs over all
369     # flags returned by all_flag_vars().
370 azarah 1.8 strip-flags() {
371 vapier 1.167 local x y var
372 agriffis 1.58
373 vapier 1.36 setup-allowed-flags
374    
375 agriffis 1.58 set -f # disable pathname expansion
376 azarah 1.8
377 vapier 1.167 for var in $(all-flag-vars) ; do
378     local new=()
379 azarah 1.8
380 vapier 1.167 for x in ${!var} ; do
381     local flag=${x%%=*}
382     for y in ${ALLOWED_FLAGS} ; do
383     if [[ -z ${flag%%${y}} ]] ; then
384     new+=( "${x}" )
385     break
386     fi
387     done
388 azarah 1.8 done
389 azarah 1.30
390 vapier 1.167 # In case we filtered out all optimization flags fallback to -O2
391 vapier 1.179 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
392 vapier 1.167 new+=( -O2 )
393     fi
394 dberkholz 1.124
395 vapier 1.190 if [[ ${!var} != "${new[*]}" ]] ; then
396     einfo "strip-flags: ${var}: changed '${!var}' to '${new[*]}'"
397     fi
398 vapier 1.167 eval export ${var}=\""${new[*]}"\"
399 dberkholz 1.124 done
400    
401 agriffis 1.58 set +f # re-enable pathname expansion
402 azarah 1.8
403 vapier 1.36 return 0
404 puggy 1.29 }
405    
406 azarah 1.96 test-flag-PROG() {
407     local comp=$1
408 vapier 1.182 local lang=$2
409     local flag=$3
410 azarah 1.96
411 vapier 1.168 [[ -z ${comp} || -z ${flag} ]] && return 1
412 azarah 1.96
413 vapier 1.152 # use -c so we can test the assembler as well
414 azarah 1.96 local PROG=$(tc-get${comp})
415 jlec 1.187 if ${PROG} -c -o /dev/null -x${lang} - < /dev/null > /dev/null 2>&1 ; then
416 jlec 1.186 ${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \
417     > /dev/null 2>&1
418     else
419 jlec 1.187 ${PROG} "${flag}" -c -o /dev/null /dev/null > /dev/null 2>&1
420 jlec 1.186 fi
421 azarah 1.96 }
422    
423 vapier 1.121 # @FUNCTION: test-flag-CC
424     # @USAGE: <flag>
425     # @DESCRIPTION:
426     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
427 vapier 1.182 test-flag-CC() { test-flag-PROG "CC" c "$1"; }
428 azarah 1.96
429 vapier 1.121 # @FUNCTION: test-flag-CXX
430     # @USAGE: <flag>
431     # @DESCRIPTION:
432     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
433 vapier 1.182 test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
434 azarah 1.96
435 dberkholz 1.124 # @FUNCTION: test-flag-F77
436     # @USAGE: <flag>
437     # @DESCRIPTION:
438     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
439 vapier 1.182 test-flag-F77() { test-flag-PROG "F77" f77 "$1"; }
440 dberkholz 1.124
441     # @FUNCTION: test-flag-FC
442     # @USAGE: <flag>
443     # @DESCRIPTION:
444     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
445 vapier 1.182 test-flag-FC() { test-flag-PROG "FC" f95 "$1"; }
446 dberkholz 1.124
447 azarah 1.99 test-flags-PROG() {
448     local comp=$1
449 vapier 1.183 local flags=()
450 azarah 1.96 local x
451 azarah 1.99
452     shift
453    
454 vapier 1.113 [[ -z ${comp} ]] && return 1
455 swegener 1.101
456 vapier 1.183 for x ; do
457     test-flag-${comp} "${x}" && flags+=( "${x}" )
458 azarah 1.96 done
459    
460 vapier 1.183 echo "${flags[*]}"
461 azarah 1.96
462 azarah 1.99 # Just bail if we dont have any flags
463 vapier 1.183 [[ ${#flags[@]} -gt 0 ]]
464 azarah 1.96 }
465    
466 vapier 1.121 # @FUNCTION: test-flags-CC
467     # @USAGE: <flags>
468     # @DESCRIPTION:
469     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
470 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
471    
472 vapier 1.121 # @FUNCTION: test-flags-CXX
473     # @USAGE: <flags>
474     # @DESCRIPTION:
475     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
476 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
477    
478 dberkholz 1.124 # @FUNCTION: test-flags-F77
479     # @USAGE: <flags>
480     # @DESCRIPTION:
481     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
482     test-flags-F77() { test-flags-PROG "F77" "$@"; }
483    
484     # @FUNCTION: test-flags-FC
485     # @USAGE: <flags>
486     # @DESCRIPTION:
487     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
488     test-flags-FC() { test-flags-PROG "FC" "$@"; }
489    
490 vapier 1.121 # @FUNCTION: test-flags
491     # @USAGE: <flags>
492     # @DESCRIPTION:
493 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
494 azarah 1.100 # its really only present due to the append-flags() abomination.
495 azarah 1.99 test-flags() { test-flags-CC "$@"; }
496    
497 vapier 1.121 # @FUNCTION: test_version_info
498     # @USAGE: <version>
499     # @DESCRIPTION:
500     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
501     # Accepts shell globs.
502 agriffis 1.58 test_version_info() {
503 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
504 agriffis 1.58 return 0
505     else
506     return 1
507     fi
508     }
509    
510 vapier 1.121 # @FUNCTION: strip-unsupported-flags
511     # @DESCRIPTION:
512 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
513 puggy 1.29 strip-unsupported-flags() {
514 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
515     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
516 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
517     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
518 azarah 1.8 }
519    
520 vapier 1.121 # @FUNCTION: get-flag
521     # @USAGE: <flag>
522     # @DESCRIPTION:
523     # Find and echo the value for a particular flag. Accepts shell globs.
524 vapier 1.10 get-flag() {
525 vapier 1.167 local f var findflag="$1"
526 agriffis 1.58
527 vapier 1.36 # this code looks a little flaky but seems to work for
528     # everything we want ...
529     # for example, if CFLAGS="-march=i686":
530 agriffis 1.58 # `get-flag -march` == "-march=i686"
531     # `get-flag march` == "i686"
532 vapier 1.167 for var in $(all-flag-vars) ; do
533     for f in ${!var} ; do
534     if [ "${f/${findflag}}" != "${f}" ] ; then
535     printf "%s\n" "${f/-${findflag}=}"
536     return 0
537     fi
538     done
539 vapier 1.10 done
540 vapier 1.28 return 1
541 joker 1.16 }
542    
543 vapier 1.121 # @FUNCTION: has_m64
544     # @DESCRIPTION:
545     # This doesn't test if the flag is accepted, it tests if the flag actually
546     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
547     # return code is 0, else the return code is 1.
548 lv 1.56 has_m64() {
549 vapier 1.166 eqawarn "${FUNCNAME}: don't use this anymore"
550    
551 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
552     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
553     # please dont replace this function with test_flag in some future
554     # clean-up!
555 swegener 1.101
556 vapier 1.72 local temp="$(emktemp)"
557 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
558 kugelfang 1.74 MY_CC=$(tc-getCC)
559 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
560 vapier 1.72 local ret=$?
561 azarah 1.96 rm -f "${temp}".c
562     [[ ${ret} != 1 ]] && return 0
563 lv 1.62 return 1
564 lv 1.56 }
565    
566     has_m32() {
567 vapier 1.166 die "${FUNCNAME}: don't use this anymore"
568 lv 1.56 }
569    
570 vapier 1.121 # @FUNCTION: replace-sparc64-flags
571     # @DESCRIPTION:
572     # Sets mcpu to v8 and uses the original value as mtune if none specified.
573 vapier 1.18 replace-sparc64-flags() {
574 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
575 joker 1.16
576 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
577 agriffis 1.58 for x in ${SPARC64_CPUS}; do
578 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
579     done
580 mr_bones_ 1.83 else
581 swegener 1.111 for x in ${SPARC64_CPUS}; do
582 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
583     done
584     fi
585 mr_bones_ 1.83
586     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
587 agriffis 1.58 for x in ${SPARC64_CPUS}; do
588 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
589     done
590     else
591 swegener 1.111 for x in ${SPARC64_CPUS}; do
592 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
593     done
594     fi
595 vapier 1.59
596     export CFLAGS CXXFLAGS
597 solar 1.27 }
598    
599 abcd 1.147 # @FUNCTION: append-libs
600     # @USAGE: <libs>
601     # @DESCRIPTION:
602     # Add extra <libs> to the current LIBS.
603     append-libs() {
604 vapier 1.158 [[ $# -eq 0 ]] && return 0
605 abcd 1.147 local flag
606     for flag in "$@"; do
607     [[ ${flag} == -l* ]] && flag=${flag#-l}
608     export LIBS="${LIBS} -l${flag}"
609     done
610    
611     return 0
612     }
613    
614 vapier 1.121 # @FUNCTION: raw-ldflags
615 vapier 1.156 # @USAGE: [flags]
616 vapier 1.121 # @DESCRIPTION:
617 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
618     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
619     # to gcc where it needs the '-Wl,'.
620 vapier 1.156 #
621     # If no flags are specified, then default to ${LDFLAGS}.
622 vapier 1.102 raw-ldflags() {
623     local x input="$@"
624     [[ -z ${input} ]] && input=${LDFLAGS}
625     set --
626     for x in ${input} ; do
627 vapier 1.180 case ${x} in
628 vapier 1.181 -Wl,*)
629 vapier 1.180 x=${x#-Wl,}
630     set -- "$@" ${x//,/ }
631     ;;
632     *) # Assume it's a compiler driver flag, so throw it away #441808
633     ;;
634     esac
635 vapier 1.102 done
636     echo "$@"
637     }
638    
639 ssuominen 1.145 # @FUNCTION: no-as-needed
640     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
641     no-as-needed() {
642     case $($(tc-getLD) -v 2>&1 </dev/null) in
643     *GNU*) # GNU ld
644     echo "-Wl,--no-as-needed" ;;
645     esac
646     }
647 vapier 1.113
648 vapier 1.160 fi

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