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Revision 1.175 - (hide annotations) (download)
Tue Jun 5 02:16:40 2012 UTC (2 years, 3 months ago) by dirtyepic
Branch: MAIN
Changes since 1.174: +3 -1 lines
Update Intel/AMD instruction sets for 4.7.

1 jlec 1.171 # Copyright 1999-2012 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 dirtyepic 1.175 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.174 2012/06/05 02:07:44 dirtyepic 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 dberkholz 1.124 # {C,CXX,F,FC}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 dirtyepic 1.174 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi=* \
49     -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 dirtyepic 1.163 export ALLOWED_FLAGS
59 vapier 1.36 return 0
60 aliz 1.24 }
61 verwilst 1.13
62 kevquinn 1.105 # inverted filters for hardened compiler. This is trying to unpick
63     # the hardened compiler defaults.
64     _filter-hardened() {
65     local f
66     for f in "$@" ; do
67     case "${f}" in
68     # Ideally we should only concern ourselves with PIE flags,
69     # not -fPIC or -fpic, but too many places filter -fPIC without
70     # thinking about -fPIE.
71     -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
72     gcc-specs-pie || continue
73     is-flagq -nopie || append-flags -nopie;;
74     -fstack-protector)
75     gcc-specs-ssp || continue
76 gengor 1.131 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
77 kevquinn 1.105 -fstack-protector-all)
78     gcc-specs-ssp-to-all || continue
79 gengor 1.131 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
80 gengor 1.128 -fno-strict-overflow)
81     gcc-specs-nostrict || continue
82 gengor 1.131 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
83 solar 1.27 esac
84     done
85 kevquinn 1.105 }
86    
87     # Remove occurrences of strings from variable given in $1
88     # Strings removed are matched as globs, so for example
89     # '-O*' would remove -O1, -O2 etc.
90     _filter-var() {
91 vapier 1.167 local f x var=$1 new=()
92     shift
93 vapier 1.36
94 vapier 1.167 for f in ${!var} ; do
95     for x in "$@" ; do
96 kevquinn 1.105 # Note this should work with globs like -O*
97     [[ ${f} == ${x} ]] && continue 2
98 agriffis 1.61 done
99 vapier 1.167 new+=( "${f}" )
100 verwilst 1.1 done
101 vapier 1.167 eval export ${var}=\""${new[*]}"\"
102 kevquinn 1.105 }
103 agriffis 1.61
104 vapier 1.121 # @FUNCTION: filter-flags
105     # @USAGE: <flags>
106     # @DESCRIPTION:
107 blueness 1.169 # Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
108 kevquinn 1.105 filter-flags() {
109     _filter-hardened "$@"
110 vapier 1.164 local v
111 vapier 1.167 for v in $(all-flag-vars) ; do
112     _filter-var ${v} "$@"
113 vapier 1.164 done
114 vapier 1.36 return 0
115 verwilst 1.2 }
116    
117 vapier 1.121 # @FUNCTION: filter-lfs-flags
118     # @DESCRIPTION:
119     # Remove flags that enable Large File Support.
120 vapier 1.40 filter-lfs-flags() {
121 vapier 1.154 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
122 vapier 1.153 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
123     # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
124     # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
125     # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
126 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127     }
128    
129 jlec 1.171 # @FUNCTION: filter-ldflags
130     # @USAGE: <flags>
131     # @DESCRIPTION:
132     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
133     filter-ldflags() {
134     _filter-var LDFLAGS "$@"
135     return 0
136     }
137    
138 vapier 1.121 # @FUNCTION: append-cppflags
139     # @USAGE: <flags>
140     # @DESCRIPTION:
141     # Add extra <flags> to the current CPPFLAGS.
142 vapier 1.118 append-cppflags() {
143 vapier 1.158 [[ $# -eq 0 ]] && return 0
144 vapier 1.118 export CPPFLAGS="${CPPFLAGS} $*"
145     return 0
146     }
147    
148 vapier 1.136 # @FUNCTION: append-cflags
149     # @USAGE: <flags>
150     # @DESCRIPTION:
151     # Add extra <flags> to the current CFLAGS.
152 mr_bones_ 1.137 append-cflags() {
153 vapier 1.158 [[ $# -eq 0 ]] && return 0
154     export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
155 vapier 1.136 return 0
156     }
157    
158 gengor 1.132 # @FUNCTION: append-cxxflags
159     # @USAGE: <flags>
160     # @DESCRIPTION:
161     # Add extra <flags> to the current CXXFLAGS.
162     append-cxxflags() {
163 vapier 1.158 [[ $# -eq 0 ]] && return 0
164     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
165 gengor 1.132 return 0
166     }
167    
168 dberkholz 1.124 # @FUNCTION: append-fflags
169     # @USAGE: <flags>
170     # @DESCRIPTION:
171     # Add extra <flags> to the current {F,FC}FLAGS.
172     append-fflags() {
173 vapier 1.158 [[ $# -eq 0 ]] && return 0
174     export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
175     export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
176 dberkholz 1.124 return 0
177     }
178    
179 vapier 1.121 # @FUNCTION: append-lfs-flags
180     # @DESCRIPTION:
181     # Add flags that enable Large File Support.
182 vapier 1.48 append-lfs-flags() {
183 vapier 1.154 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
184 vapier 1.155 # see comments in filter-lfs-flags func for meaning of these
185 vapier 1.118 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
186 vapier 1.48 }
187    
188 jlec 1.171 # @FUNCTION: append-ldflags
189     # @USAGE: <flags>
190     # @DESCRIPTION:
191     # Add extra <flags> to the current LDFLAGS.
192     append-ldflags() {
193     [[ $# -eq 0 ]] && return 0
194     local flag
195     for flag in "$@"; do
196     [[ ${flag} == -l* ]] && \
197     ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
198     done
199    
200     export LDFLAGS="${LDFLAGS} $*"
201     return 0
202     }
203    
204 vapier 1.121 # @FUNCTION: append-flags
205     # @USAGE: <flags>
206     # @DESCRIPTION:
207 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
208 vapier 1.18 append-flags() {
209 vapier 1.158 [[ $# -eq 0 ]] && return 0
210 vapier 1.170 case " $* " in
211     *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
212 vapier 1.172 *' '-L*|\
213 vapier 1.173 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
214 vapier 1.170 esac
215 vapier 1.136 append-cflags "$@"
216 vapier 1.138 append-cxxflags "$@"
217 vapier 1.136 append-fflags "$@"
218 vapier 1.28 return 0
219 verwilst 1.1 }
220    
221 vapier 1.121 # @FUNCTION: replace-flags
222     # @USAGE: <old> <new>
223     # @DESCRIPTION:
224     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
225 vapier 1.18 replace-flags() {
226 vapier 1.167 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
227 vapier 1.93
228 vapier 1.167 local f var new
229     for var in $(all-flag-vars) ; do
230 agriffis 1.64 # Looping over the flags instead of using a global
231     # substitution ensures that we're working with flag atoms.
232     # Otherwise globs like -O* have the potential to wipe out the
233     # list of flags.
234 vapier 1.167 new=()
235     for f in ${!var} ; do
236 agriffis 1.64 # Note this should work with globs like -O*
237     [[ ${f} == ${1} ]] && f=${2}
238 vapier 1.167 new+=( "${f}" )
239 agriffis 1.64 done
240 vapier 1.167 eval export ${var}=\""${new[*]}"\"
241 agriffis 1.64 done
242    
243 vapier 1.28 return 0
244 danarmak 1.7 }
245    
246 vapier 1.121 # @FUNCTION: replace-cpu-flags
247     # @USAGE: <old> <new>
248     # @DESCRIPTION:
249     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
250     # with flags that select the <new> cpu. Accepts shell globs for <old>.
251 vapier 1.37 replace-cpu-flags() {
252 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
253     while [ $# -gt 1 ] ; do
254 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
255 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
256 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
257     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
258     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
259     shift
260 vapier 1.37 done
261     return 0
262     }
263    
264 vapier 1.113 _is_flagq() {
265 kevquinn 1.105 local x
266 vapier 1.113 for x in ${!1} ; do
267     [[ ${x} == $2 ]] && return 0
268 kevquinn 1.105 done
269     return 1
270     }
271    
272 vapier 1.121 # @FUNCTION: is-flagq
273     # @USAGE: <flag>
274     # @DESCRIPTION:
275 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
276 vapier 1.113 is-flagq() {
277     [[ -n $2 ]] && die "Usage: is-flag <flag>"
278 vapier 1.167
279     local var
280     for var in $(all-flag-vars) ; do
281     _is_flagq ${var} "$1" && return 0
282     done
283     return 1
284 vapier 1.113 }
285    
286 vapier 1.121 # @FUNCTION: is-flag
287     # @USAGE: <flag>
288     # @DESCRIPTION:
289 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
290 danarmak 1.7 is-flag() {
291 vapier 1.113 is-flagq "$@" && echo true
292 kevquinn 1.105 }
293    
294 vapier 1.121 # @FUNCTION: is-ldflagq
295     # @USAGE: <flag>
296     # @DESCRIPTION:
297     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
298 kevquinn 1.105 is-ldflagq() {
299 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
300     _is_flagq LDFLAGS $1
301 verwilst 1.1 }
302 azarah 1.8
303 vapier 1.121 # @FUNCTION: is-ldflag
304     # @USAGE: <flag>
305     # @DESCRIPTION:
306     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
307 kevquinn 1.105 is-ldflag() {
308 vapier 1.113 is-ldflagq "$@" && echo true
309 kevquinn 1.105 }
310    
311 vapier 1.121 # @FUNCTION: filter-mfpmath
312     # @USAGE: <math types>
313     # @DESCRIPTION:
314     # Remove specified math types from the fpmath flag. For example, if the user
315     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
316     # -mfpmath=386.
317 vapier 1.36 filter-mfpmath() {
318 agriffis 1.58 local orig_mfpmath new_math prune_math
319    
320 vapier 1.36 # save the original -mfpmath flag
321 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
322 vapier 1.36 # get the value of the current -mfpmath flag
323 vapier 1.109 new_math=$(get-flag mfpmath)
324     new_math=" ${new_math//,/ } "
325 vapier 1.36 # figure out which math values are to be removed
326 agriffis 1.58 prune_math=""
327 vapier 1.36 for prune_math in "$@" ; do
328 vapier 1.109 new_math=${new_math/ ${prune_math} / }
329 vapier 1.36 done
330 vapier 1.109 new_math=$(echo ${new_math})
331     new_math=${new_math// /,}
332 vapier 1.36
333 vapier 1.109 if [[ -z ${new_math} ]] ; then
334 vapier 1.36 # if we're removing all user specified math values are
335     # slated for removal, then we just filter the flag
336     filter-flags ${orig_mfpmath}
337     else
338     # if we only want to filter some of the user specified
339     # math values, then we replace the current flag
340     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
341     fi
342     return 0
343     }
344    
345 vapier 1.121 # @FUNCTION: strip-flags
346     # @DESCRIPTION:
347     # Strip C[XX]FLAGS of everything except known good/safe flags.
348 azarah 1.8 strip-flags() {
349 vapier 1.167 local x y var
350 agriffis 1.58
351 vapier 1.36 setup-allowed-flags
352    
353 agriffis 1.58 set -f # disable pathname expansion
354 azarah 1.8
355 vapier 1.167 for var in $(all-flag-vars) ; do
356     local new=()
357 azarah 1.8
358 vapier 1.167 for x in ${!var} ; do
359     local flag=${x%%=*}
360     for y in ${ALLOWED_FLAGS} ; do
361     if [[ -z ${flag%%${y}} ]] ; then
362     new+=( "${x}" )
363     break
364     fi
365     done
366 azarah 1.8 done
367 azarah 1.30
368 vapier 1.167 # In case we filtered out all optimization flags fallback to -O2
369     if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
370     new+=( -O2 )
371     fi
372 dberkholz 1.124
373 vapier 1.167 eval export ${var}=\""${new[*]}"\"
374 dberkholz 1.124 done
375    
376 agriffis 1.58 set +f # re-enable pathname expansion
377 azarah 1.8
378 vapier 1.36 return 0
379 puggy 1.29 }
380    
381 azarah 1.96 test-flag-PROG() {
382     local comp=$1
383 vapier 1.168 local flag=$2
384 azarah 1.96
385 vapier 1.168 [[ -z ${comp} || -z ${flag} ]] && return 1
386 azarah 1.96
387 vapier 1.152 # use -c so we can test the assembler as well
388 azarah 1.96 local PROG=$(tc-get${comp})
389 vapier 1.168 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
390 azarah 1.96 > /dev/null 2>&1
391     }
392    
393 vapier 1.121 # @FUNCTION: test-flag-CC
394     # @USAGE: <flag>
395     # @DESCRIPTION:
396     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
397 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
398    
399 vapier 1.121 # @FUNCTION: test-flag-CXX
400     # @USAGE: <flag>
401     # @DESCRIPTION:
402     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
403 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
404    
405 dberkholz 1.124 # @FUNCTION: test-flag-F77
406     # @USAGE: <flag>
407     # @DESCRIPTION:
408     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
409     test-flag-F77() { test-flag-PROG "F77" "$1"; }
410    
411     # @FUNCTION: test-flag-FC
412     # @USAGE: <flag>
413     # @DESCRIPTION:
414     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
415     test-flag-FC() { test-flag-PROG "FC" "$1"; }
416    
417 azarah 1.99 test-flags-PROG() {
418     local comp=$1
419     local flags
420 azarah 1.96 local x
421 azarah 1.99
422     shift
423    
424 vapier 1.113 [[ -z ${comp} ]] && return 1
425 swegener 1.101
426 azarah 1.96 for x in "$@" ; do
427 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
428 azarah 1.96 done
429    
430 azarah 1.99 echo "${flags}"
431 azarah 1.96
432 azarah 1.99 # Just bail if we dont have any flags
433     [[ -n ${flags} ]]
434 azarah 1.96 }
435    
436 vapier 1.121 # @FUNCTION: test-flags-CC
437     # @USAGE: <flags>
438     # @DESCRIPTION:
439     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
440 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
441    
442 vapier 1.121 # @FUNCTION: test-flags-CXX
443     # @USAGE: <flags>
444     # @DESCRIPTION:
445     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
446 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
447    
448 dberkholz 1.124 # @FUNCTION: test-flags-F77
449     # @USAGE: <flags>
450     # @DESCRIPTION:
451     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
452     test-flags-F77() { test-flags-PROG "F77" "$@"; }
453    
454     # @FUNCTION: test-flags-FC
455     # @USAGE: <flags>
456     # @DESCRIPTION:
457     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
458     test-flags-FC() { test-flags-PROG "FC" "$@"; }
459    
460 vapier 1.121 # @FUNCTION: test-flags
461     # @USAGE: <flags>
462     # @DESCRIPTION:
463 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
464 azarah 1.100 # its really only present due to the append-flags() abomination.
465 azarah 1.99 test-flags() { test-flags-CC "$@"; }
466    
467 vapier 1.121 # @FUNCTION: test_version_info
468     # @USAGE: <version>
469     # @DESCRIPTION:
470     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
471     # Accepts shell globs.
472 agriffis 1.58 test_version_info() {
473 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
474 agriffis 1.58 return 0
475     else
476     return 1
477     fi
478     }
479    
480 vapier 1.121 # @FUNCTION: strip-unsupported-flags
481     # @DESCRIPTION:
482 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
483 puggy 1.29 strip-unsupported-flags() {
484 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
485     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
486 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
487     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
488 azarah 1.8 }
489    
490 vapier 1.121 # @FUNCTION: get-flag
491     # @USAGE: <flag>
492     # @DESCRIPTION:
493     # Find and echo the value for a particular flag. Accepts shell globs.
494 vapier 1.10 get-flag() {
495 vapier 1.167 local f var findflag="$1"
496 agriffis 1.58
497 vapier 1.36 # this code looks a little flaky but seems to work for
498     # everything we want ...
499     # for example, if CFLAGS="-march=i686":
500 agriffis 1.58 # `get-flag -march` == "-march=i686"
501     # `get-flag march` == "i686"
502 vapier 1.167 for var in $(all-flag-vars) ; do
503     for f in ${!var} ; do
504     if [ "${f/${findflag}}" != "${f}" ] ; then
505     printf "%s\n" "${f/-${findflag}=}"
506     return 0
507     fi
508     done
509 vapier 1.10 done
510 vapier 1.28 return 1
511 joker 1.16 }
512    
513 vapier 1.121 # @FUNCTION: has_m64
514     # @DESCRIPTION:
515     # This doesn't test if the flag is accepted, it tests if the flag actually
516     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
517     # return code is 0, else the return code is 1.
518 lv 1.56 has_m64() {
519 vapier 1.166 eqawarn "${FUNCNAME}: don't use this anymore"
520    
521 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
522     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
523     # please dont replace this function with test_flag in some future
524     # clean-up!
525 swegener 1.101
526 vapier 1.72 local temp="$(emktemp)"
527 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
528 kugelfang 1.74 MY_CC=$(tc-getCC)
529 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
530 vapier 1.72 local ret=$?
531 azarah 1.96 rm -f "${temp}".c
532     [[ ${ret} != 1 ]] && return 0
533 lv 1.62 return 1
534 lv 1.56 }
535    
536     has_m32() {
537 vapier 1.166 die "${FUNCNAME}: don't use this anymore"
538 lv 1.56 }
539    
540 vapier 1.121 # @FUNCTION: replace-sparc64-flags
541     # @DESCRIPTION:
542     # Sets mcpu to v8 and uses the original value as mtune if none specified.
543 vapier 1.18 replace-sparc64-flags() {
544 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
545 joker 1.16
546 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
547 agriffis 1.58 for x in ${SPARC64_CPUS}; do
548 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
549     done
550 mr_bones_ 1.83 else
551 swegener 1.111 for x in ${SPARC64_CPUS}; do
552 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
553     done
554     fi
555 mr_bones_ 1.83
556     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
557 agriffis 1.58 for x in ${SPARC64_CPUS}; do
558 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
559     done
560     else
561 swegener 1.111 for x in ${SPARC64_CPUS}; do
562 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
563     done
564     fi
565 vapier 1.59
566     export CFLAGS CXXFLAGS
567 solar 1.27 }
568    
569 abcd 1.147 # @FUNCTION: append-libs
570     # @USAGE: <libs>
571     # @DESCRIPTION:
572     # Add extra <libs> to the current LIBS.
573     append-libs() {
574 vapier 1.158 [[ $# -eq 0 ]] && return 0
575 abcd 1.147 local flag
576     for flag in "$@"; do
577     [[ ${flag} == -l* ]] && flag=${flag#-l}
578     export LIBS="${LIBS} -l${flag}"
579     done
580    
581     return 0
582     }
583    
584 vapier 1.121 # @FUNCTION: raw-ldflags
585 vapier 1.156 # @USAGE: [flags]
586 vapier 1.121 # @DESCRIPTION:
587 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
588     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
589     # to gcc where it needs the '-Wl,'.
590 vapier 1.156 #
591     # If no flags are specified, then default to ${LDFLAGS}.
592 vapier 1.102 raw-ldflags() {
593     local x input="$@"
594     [[ -z ${input} ]] && input=${LDFLAGS}
595     set --
596     for x in ${input} ; do
597 vapier 1.103 x=${x#-Wl,}
598     set -- "$@" ${x//,/ }
599 vapier 1.102 done
600     echo "$@"
601     }
602    
603 ssuominen 1.145 # @FUNCTION: no-as-needed
604     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
605     no-as-needed() {
606     case $($(tc-getLD) -v 2>&1 </dev/null) in
607     *GNU*) # GNU ld
608     echo "-Wl,--no-as-needed" ;;
609     esac
610     }
611 vapier 1.113
612 vapier 1.160 fi

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