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Revision 1.180 - (hide annotations) (download)
Sun Nov 11 07:00:01 2012 UTC (19 months, 4 weeks ago) by vapier
Branch: MAIN
Changes since 1.179: +9 -3 lines
raw-ldflags: throw away flags that do not start with -Wl, #441808

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 vapier 1.180 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.179 2012/10/30 20:51:44 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 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 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 [[ $# -eq 0 ]] && return 0
147 vapier 1.118 export CPPFLAGS="${CPPFLAGS} $*"
148     return 0
149     }
150    
151 vapier 1.136 # @FUNCTION: append-cflags
152     # @USAGE: <flags>
153     # @DESCRIPTION:
154     # Add extra <flags> to the current CFLAGS.
155 mr_bones_ 1.137 append-cflags() {
156 vapier 1.158 [[ $# -eq 0 ]] && return 0
157     export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
158 vapier 1.136 return 0
159     }
160    
161 gengor 1.132 # @FUNCTION: append-cxxflags
162     # @USAGE: <flags>
163     # @DESCRIPTION:
164     # Add extra <flags> to the current CXXFLAGS.
165     append-cxxflags() {
166 vapier 1.158 [[ $# -eq 0 ]] && return 0
167     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
168 gengor 1.132 return 0
169     }
170    
171 dberkholz 1.124 # @FUNCTION: append-fflags
172     # @USAGE: <flags>
173     # @DESCRIPTION:
174     # Add extra <flags> to the current {F,FC}FLAGS.
175     append-fflags() {
176 vapier 1.158 [[ $# -eq 0 ]] && return 0
177     export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
178     export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
179 dberkholz 1.124 return 0
180     }
181    
182 vapier 1.121 # @FUNCTION: append-lfs-flags
183     # @DESCRIPTION:
184     # Add flags that enable Large File Support.
185 vapier 1.48 append-lfs-flags() {
186 vapier 1.154 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 vapier 1.155 # see comments in filter-lfs-flags func for meaning of these
188 vapier 1.118 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189 vapier 1.48 }
190    
191 jlec 1.171 # @FUNCTION: append-ldflags
192     # @USAGE: <flags>
193     # @DESCRIPTION:
194     # Add extra <flags> to the current LDFLAGS.
195     append-ldflags() {
196     [[ $# -eq 0 ]] && return 0
197     local flag
198     for flag in "$@"; do
199     [[ ${flag} == -l* ]] && \
200 vapier 1.177 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
201 jlec 1.171 done
202    
203     export LDFLAGS="${LDFLAGS} $*"
204     return 0
205     }
206    
207 vapier 1.121 # @FUNCTION: append-flags
208     # @USAGE: <flags>
209     # @DESCRIPTION:
210 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
211 vapier 1.18 append-flags() {
212 vapier 1.158 [[ $# -eq 0 ]] && return 0
213 vapier 1.170 case " $* " in
214     *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
215 vapier 1.172 *' '-L*|\
216 vapier 1.173 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
217 vapier 1.170 esac
218 vapier 1.136 append-cflags "$@"
219 vapier 1.138 append-cxxflags "$@"
220 vapier 1.136 append-fflags "$@"
221 vapier 1.28 return 0
222 verwilst 1.1 }
223    
224 vapier 1.121 # @FUNCTION: replace-flags
225     # @USAGE: <old> <new>
226     # @DESCRIPTION:
227     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
228 vapier 1.18 replace-flags() {
229 vapier 1.167 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
230 vapier 1.93
231 vapier 1.167 local f var new
232     for var in $(all-flag-vars) ; do
233 agriffis 1.64 # Looping over the flags instead of using a global
234     # substitution ensures that we're working with flag atoms.
235     # Otherwise globs like -O* have the potential to wipe out the
236     # list of flags.
237 vapier 1.167 new=()
238     for f in ${!var} ; do
239 agriffis 1.64 # Note this should work with globs like -O*
240     [[ ${f} == ${1} ]] && f=${2}
241 vapier 1.167 new+=( "${f}" )
242 agriffis 1.64 done
243 vapier 1.167 eval export ${var}=\""${new[*]}"\"
244 agriffis 1.64 done
245    
246 vapier 1.28 return 0
247 danarmak 1.7 }
248    
249 vapier 1.121 # @FUNCTION: replace-cpu-flags
250     # @USAGE: <old> <new>
251     # @DESCRIPTION:
252     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
253     # with flags that select the <new> cpu. Accepts shell globs for <old>.
254 vapier 1.37 replace-cpu-flags() {
255 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
256     while [ $# -gt 1 ] ; do
257 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
258 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
259 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
260     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
261     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
262     shift
263 vapier 1.37 done
264     return 0
265     }
266    
267 vapier 1.113 _is_flagq() {
268 vapier 1.179 local x var
269     eval var=\""\${$1[*]}"\"
270     for x in ${var} ; do
271 vapier 1.113 [[ ${x} == $2 ]] && return 0
272 kevquinn 1.105 done
273     return 1
274     }
275    
276 vapier 1.121 # @FUNCTION: is-flagq
277     # @USAGE: <flag>
278     # @DESCRIPTION:
279 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
280 vapier 1.113 is-flagq() {
281     [[ -n $2 ]] && die "Usage: is-flag <flag>"
282 vapier 1.167
283     local var
284     for var in $(all-flag-vars) ; do
285     _is_flagq ${var} "$1" && return 0
286     done
287     return 1
288 vapier 1.113 }
289    
290 vapier 1.121 # @FUNCTION: is-flag
291     # @USAGE: <flag>
292     # @DESCRIPTION:
293 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
294 danarmak 1.7 is-flag() {
295 vapier 1.113 is-flagq "$@" && echo true
296 kevquinn 1.105 }
297    
298 vapier 1.121 # @FUNCTION: is-ldflagq
299     # @USAGE: <flag>
300     # @DESCRIPTION:
301     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
302 kevquinn 1.105 is-ldflagq() {
303 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
304     _is_flagq LDFLAGS $1
305 verwilst 1.1 }
306 azarah 1.8
307 vapier 1.121 # @FUNCTION: is-ldflag
308     # @USAGE: <flag>
309     # @DESCRIPTION:
310     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
311 kevquinn 1.105 is-ldflag() {
312 vapier 1.113 is-ldflagq "$@" && echo true
313 kevquinn 1.105 }
314    
315 vapier 1.121 # @FUNCTION: filter-mfpmath
316     # @USAGE: <math types>
317     # @DESCRIPTION:
318     # Remove specified math types from the fpmath flag. For example, if the user
319     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
320     # -mfpmath=386.
321 vapier 1.36 filter-mfpmath() {
322 agriffis 1.58 local orig_mfpmath new_math prune_math
323    
324 vapier 1.36 # save the original -mfpmath flag
325 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
326 vapier 1.36 # get the value of the current -mfpmath flag
327 vapier 1.109 new_math=$(get-flag mfpmath)
328     new_math=" ${new_math//,/ } "
329 vapier 1.36 # figure out which math values are to be removed
330 agriffis 1.58 prune_math=""
331 vapier 1.36 for prune_math in "$@" ; do
332 vapier 1.109 new_math=${new_math/ ${prune_math} / }
333 vapier 1.36 done
334 vapier 1.109 new_math=$(echo ${new_math})
335     new_math=${new_math// /,}
336 vapier 1.36
337 vapier 1.109 if [[ -z ${new_math} ]] ; then
338 vapier 1.36 # if we're removing all user specified math values are
339     # slated for removal, then we just filter the flag
340     filter-flags ${orig_mfpmath}
341     else
342     # if we only want to filter some of the user specified
343     # math values, then we replace the current flag
344     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
345     fi
346     return 0
347     }
348    
349 vapier 1.121 # @FUNCTION: strip-flags
350     # @DESCRIPTION:
351 grobian 1.176 # Strip *FLAGS of everything except known good/safe flags. This runs over all
352     # flags returned by all_flag_vars().
353 azarah 1.8 strip-flags() {
354 vapier 1.167 local x y var
355 agriffis 1.58
356 vapier 1.36 setup-allowed-flags
357    
358 agriffis 1.58 set -f # disable pathname expansion
359 azarah 1.8
360 vapier 1.167 for var in $(all-flag-vars) ; do
361     local new=()
362 azarah 1.8
363 vapier 1.167 for x in ${!var} ; do
364     local flag=${x%%=*}
365     for y in ${ALLOWED_FLAGS} ; do
366     if [[ -z ${flag%%${y}} ]] ; then
367     new+=( "${x}" )
368     break
369     fi
370     done
371 azarah 1.8 done
372 azarah 1.30
373 vapier 1.167 # In case we filtered out all optimization flags fallback to -O2
374 vapier 1.179 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
375 vapier 1.167 new+=( -O2 )
376     fi
377 dberkholz 1.124
378 vapier 1.167 eval export ${var}=\""${new[*]}"\"
379 dberkholz 1.124 done
380    
381 agriffis 1.58 set +f # re-enable pathname expansion
382 azarah 1.8
383 vapier 1.36 return 0
384 puggy 1.29 }
385    
386 azarah 1.96 test-flag-PROG() {
387     local comp=$1
388 vapier 1.168 local flag=$2
389 azarah 1.96
390 vapier 1.168 [[ -z ${comp} || -z ${flag} ]] && return 1
391 azarah 1.96
392 vapier 1.152 # use -c so we can test the assembler as well
393 azarah 1.96 local PROG=$(tc-get${comp})
394 vapier 1.168 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
395 azarah 1.96 > /dev/null 2>&1
396     }
397    
398 vapier 1.121 # @FUNCTION: test-flag-CC
399     # @USAGE: <flag>
400     # @DESCRIPTION:
401     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
402 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
403    
404 vapier 1.121 # @FUNCTION: test-flag-CXX
405     # @USAGE: <flag>
406     # @DESCRIPTION:
407     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
408 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
409    
410 dberkholz 1.124 # @FUNCTION: test-flag-F77
411     # @USAGE: <flag>
412     # @DESCRIPTION:
413     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
414     test-flag-F77() { test-flag-PROG "F77" "$1"; }
415    
416     # @FUNCTION: test-flag-FC
417     # @USAGE: <flag>
418     # @DESCRIPTION:
419     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
420     test-flag-FC() { test-flag-PROG "FC" "$1"; }
421    
422 azarah 1.99 test-flags-PROG() {
423     local comp=$1
424     local flags
425 azarah 1.96 local x
426 azarah 1.99
427     shift
428    
429 vapier 1.113 [[ -z ${comp} ]] && return 1
430 swegener 1.101
431 azarah 1.96 for x in "$@" ; do
432 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
433 azarah 1.96 done
434    
435 azarah 1.99 echo "${flags}"
436 azarah 1.96
437 azarah 1.99 # Just bail if we dont have any flags
438     [[ -n ${flags} ]]
439 azarah 1.96 }
440    
441 vapier 1.121 # @FUNCTION: test-flags-CC
442     # @USAGE: <flags>
443     # @DESCRIPTION:
444     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
445 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
446    
447 vapier 1.121 # @FUNCTION: test-flags-CXX
448     # @USAGE: <flags>
449     # @DESCRIPTION:
450     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
451 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
452    
453 dberkholz 1.124 # @FUNCTION: test-flags-F77
454     # @USAGE: <flags>
455     # @DESCRIPTION:
456     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
457     test-flags-F77() { test-flags-PROG "F77" "$@"; }
458    
459     # @FUNCTION: test-flags-FC
460     # @USAGE: <flags>
461     # @DESCRIPTION:
462     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
463     test-flags-FC() { test-flags-PROG "FC" "$@"; }
464    
465 vapier 1.121 # @FUNCTION: test-flags
466     # @USAGE: <flags>
467     # @DESCRIPTION:
468 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
469 azarah 1.100 # its really only present due to the append-flags() abomination.
470 azarah 1.99 test-flags() { test-flags-CC "$@"; }
471    
472 vapier 1.121 # @FUNCTION: test_version_info
473     # @USAGE: <version>
474     # @DESCRIPTION:
475     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
476     # Accepts shell globs.
477 agriffis 1.58 test_version_info() {
478 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
479 agriffis 1.58 return 0
480     else
481     return 1
482     fi
483     }
484    
485 vapier 1.121 # @FUNCTION: strip-unsupported-flags
486     # @DESCRIPTION:
487 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
488 puggy 1.29 strip-unsupported-flags() {
489 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
490     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
491 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
492     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
493 azarah 1.8 }
494    
495 vapier 1.121 # @FUNCTION: get-flag
496     # @USAGE: <flag>
497     # @DESCRIPTION:
498     # Find and echo the value for a particular flag. Accepts shell globs.
499 vapier 1.10 get-flag() {
500 vapier 1.167 local f var findflag="$1"
501 agriffis 1.58
502 vapier 1.36 # this code looks a little flaky but seems to work for
503     # everything we want ...
504     # for example, if CFLAGS="-march=i686":
505 agriffis 1.58 # `get-flag -march` == "-march=i686"
506     # `get-flag march` == "i686"
507 vapier 1.167 for var in $(all-flag-vars) ; do
508     for f in ${!var} ; do
509     if [ "${f/${findflag}}" != "${f}" ] ; then
510     printf "%s\n" "${f/-${findflag}=}"
511     return 0
512     fi
513     done
514 vapier 1.10 done
515 vapier 1.28 return 1
516 joker 1.16 }
517    
518 vapier 1.121 # @FUNCTION: has_m64
519     # @DESCRIPTION:
520     # This doesn't test if the flag is accepted, it tests if the flag actually
521     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
522     # return code is 0, else the return code is 1.
523 lv 1.56 has_m64() {
524 vapier 1.166 eqawarn "${FUNCNAME}: don't use this anymore"
525    
526 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
527     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
528     # please dont replace this function with test_flag in some future
529     # clean-up!
530 swegener 1.101
531 vapier 1.72 local temp="$(emktemp)"
532 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
533 kugelfang 1.74 MY_CC=$(tc-getCC)
534 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
535 vapier 1.72 local ret=$?
536 azarah 1.96 rm -f "${temp}".c
537     [[ ${ret} != 1 ]] && return 0
538 lv 1.62 return 1
539 lv 1.56 }
540    
541     has_m32() {
542 vapier 1.166 die "${FUNCNAME}: don't use this anymore"
543 lv 1.56 }
544    
545 vapier 1.121 # @FUNCTION: replace-sparc64-flags
546     # @DESCRIPTION:
547     # Sets mcpu to v8 and uses the original value as mtune if none specified.
548 vapier 1.18 replace-sparc64-flags() {
549 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
550 joker 1.16
551 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
552 agriffis 1.58 for x in ${SPARC64_CPUS}; do
553 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
554     done
555 mr_bones_ 1.83 else
556 swegener 1.111 for x in ${SPARC64_CPUS}; do
557 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
558     done
559     fi
560 mr_bones_ 1.83
561     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
562 agriffis 1.58 for x in ${SPARC64_CPUS}; do
563 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
564     done
565     else
566 swegener 1.111 for x in ${SPARC64_CPUS}; do
567 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
568     done
569     fi
570 vapier 1.59
571     export CFLAGS CXXFLAGS
572 solar 1.27 }
573    
574 abcd 1.147 # @FUNCTION: append-libs
575     # @USAGE: <libs>
576     # @DESCRIPTION:
577     # Add extra <libs> to the current LIBS.
578     append-libs() {
579 vapier 1.158 [[ $# -eq 0 ]] && return 0
580 abcd 1.147 local flag
581     for flag in "$@"; do
582     [[ ${flag} == -l* ]] && flag=${flag#-l}
583     export LIBS="${LIBS} -l${flag}"
584     done
585    
586     return 0
587     }
588    
589 vapier 1.121 # @FUNCTION: raw-ldflags
590 vapier 1.156 # @USAGE: [flags]
591 vapier 1.121 # @DESCRIPTION:
592 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
593     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
594     # to gcc where it needs the '-Wl,'.
595 vapier 1.156 #
596     # If no flags are specified, then default to ${LDFLAGS}.
597 vapier 1.102 raw-ldflags() {
598     local x input="$@"
599     [[ -z ${input} ]] && input=${LDFLAGS}
600     set --
601     for x in ${input} ; do
602 vapier 1.180 case ${x} in
603     -Wl*,)
604     x=${x#-Wl,}
605     set -- "$@" ${x//,/ }
606     ;;
607     *) # Assume it's a compiler driver flag, so throw it away #441808
608     ;;
609     esac
610 vapier 1.102 done
611     echo "$@"
612     }
613    
614 ssuominen 1.145 # @FUNCTION: no-as-needed
615     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
616     no-as-needed() {
617     case $($(tc-getLD) -v 2>&1 </dev/null) in
618     *GNU*) # GNU ld
619     echo "-Wl,--no-as-needed" ;;
620     esac
621     }
622 vapier 1.113
623 vapier 1.160 fi

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