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Revision 1.178 - (hide annotations) (download)
Tue Oct 30 20:20:37 2012 UTC (21 months, 3 weeks ago) by vapier
Branch: MAIN
Changes since 1.177: +2 -2 lines
strip-flags: do not add -O2 if user has -O #440306 by Denis M

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 1.178 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.177 2012/06/23 22:21:50 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 kevquinn 1.105 local x
269 vapier 1.113 for x in ${!1} ; do
270     [[ ${x} == $2 ]] && return 0
271 kevquinn 1.105 done
272     return 1
273     }
274    
275 vapier 1.121 # @FUNCTION: is-flagq
276     # @USAGE: <flag>
277     # @DESCRIPTION:
278 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
279 vapier 1.113 is-flagq() {
280     [[ -n $2 ]] && die "Usage: is-flag <flag>"
281 vapier 1.167
282     local var
283     for var in $(all-flag-vars) ; do
284     _is_flagq ${var} "$1" && return 0
285     done
286     return 1
287 vapier 1.113 }
288    
289 vapier 1.121 # @FUNCTION: is-flag
290     # @USAGE: <flag>
291     # @DESCRIPTION:
292 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
293 danarmak 1.7 is-flag() {
294 vapier 1.113 is-flagq "$@" && echo true
295 kevquinn 1.105 }
296    
297 vapier 1.121 # @FUNCTION: is-ldflagq
298     # @USAGE: <flag>
299     # @DESCRIPTION:
300     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
301 kevquinn 1.105 is-ldflagq() {
302 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
303     _is_flagq LDFLAGS $1
304 verwilst 1.1 }
305 azarah 1.8
306 vapier 1.121 # @FUNCTION: is-ldflag
307     # @USAGE: <flag>
308     # @DESCRIPTION:
309     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
310 kevquinn 1.105 is-ldflag() {
311 vapier 1.113 is-ldflagq "$@" && echo true
312 kevquinn 1.105 }
313    
314 vapier 1.121 # @FUNCTION: filter-mfpmath
315     # @USAGE: <math types>
316     # @DESCRIPTION:
317     # Remove specified math types from the fpmath flag. For example, if the user
318     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
319     # -mfpmath=386.
320 vapier 1.36 filter-mfpmath() {
321 agriffis 1.58 local orig_mfpmath new_math prune_math
322    
323 vapier 1.36 # save the original -mfpmath flag
324 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
325 vapier 1.36 # get the value of the current -mfpmath flag
326 vapier 1.109 new_math=$(get-flag mfpmath)
327     new_math=" ${new_math//,/ } "
328 vapier 1.36 # figure out which math values are to be removed
329 agriffis 1.58 prune_math=""
330 vapier 1.36 for prune_math in "$@" ; do
331 vapier 1.109 new_math=${new_math/ ${prune_math} / }
332 vapier 1.36 done
333 vapier 1.109 new_math=$(echo ${new_math})
334     new_math=${new_math// /,}
335 vapier 1.36
336 vapier 1.109 if [[ -z ${new_math} ]] ; then
337 vapier 1.36 # if we're removing all user specified math values are
338     # slated for removal, then we just filter the flag
339     filter-flags ${orig_mfpmath}
340     else
341     # if we only want to filter some of the user specified
342     # math values, then we replace the current flag
343     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
344     fi
345     return 0
346     }
347    
348 vapier 1.121 # @FUNCTION: strip-flags
349     # @DESCRIPTION:
350 grobian 1.176 # Strip *FLAGS of everything except known good/safe flags. This runs over all
351     # flags returned by all_flag_vars().
352 azarah 1.8 strip-flags() {
353 vapier 1.167 local x y var
354 agriffis 1.58
355 vapier 1.36 setup-allowed-flags
356    
357 agriffis 1.58 set -f # disable pathname expansion
358 azarah 1.8
359 vapier 1.167 for var in $(all-flag-vars) ; do
360     local new=()
361 azarah 1.8
362 vapier 1.167 for x in ${!var} ; do
363     local flag=${x%%=*}
364     for y in ${ALLOWED_FLAGS} ; do
365     if [[ -z ${flag%%${y}} ]] ; then
366     new+=( "${x}" )
367     break
368     fi
369     done
370 azarah 1.8 done
371 azarah 1.30
372 vapier 1.167 # In case we filtered out all optimization flags fallback to -O2
373 vapier 1.178 if _is_flagq ${var} "-O*" && ! (_is_flagq new "-O*" || _is_flagq new -O) ; then
374 vapier 1.167 new+=( -O2 )
375     fi
376 dberkholz 1.124
377 vapier 1.167 eval export ${var}=\""${new[*]}"\"
378 dberkholz 1.124 done
379    
380 agriffis 1.58 set +f # re-enable pathname expansion
381 azarah 1.8
382 vapier 1.36 return 0
383 puggy 1.29 }
384    
385 azarah 1.96 test-flag-PROG() {
386     local comp=$1
387 vapier 1.168 local flag=$2
388 azarah 1.96
389 vapier 1.168 [[ -z ${comp} || -z ${flag} ]] && return 1
390 azarah 1.96
391 vapier 1.152 # use -c so we can test the assembler as well
392 azarah 1.96 local PROG=$(tc-get${comp})
393 vapier 1.168 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
394 azarah 1.96 > /dev/null 2>&1
395     }
396    
397 vapier 1.121 # @FUNCTION: test-flag-CC
398     # @USAGE: <flag>
399     # @DESCRIPTION:
400     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
401 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
402    
403 vapier 1.121 # @FUNCTION: test-flag-CXX
404     # @USAGE: <flag>
405     # @DESCRIPTION:
406     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
407 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
408    
409 dberkholz 1.124 # @FUNCTION: test-flag-F77
410     # @USAGE: <flag>
411     # @DESCRIPTION:
412     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
413     test-flag-F77() { test-flag-PROG "F77" "$1"; }
414    
415     # @FUNCTION: test-flag-FC
416     # @USAGE: <flag>
417     # @DESCRIPTION:
418     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
419     test-flag-FC() { test-flag-PROG "FC" "$1"; }
420    
421 azarah 1.99 test-flags-PROG() {
422     local comp=$1
423     local flags
424 azarah 1.96 local x
425 azarah 1.99
426     shift
427    
428 vapier 1.113 [[ -z ${comp} ]] && return 1
429 swegener 1.101
430 azarah 1.96 for x in "$@" ; do
431 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
432 azarah 1.96 done
433    
434 azarah 1.99 echo "${flags}"
435 azarah 1.96
436 azarah 1.99 # Just bail if we dont have any flags
437     [[ -n ${flags} ]]
438 azarah 1.96 }
439    
440 vapier 1.121 # @FUNCTION: test-flags-CC
441     # @USAGE: <flags>
442     # @DESCRIPTION:
443     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
444 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
445    
446 vapier 1.121 # @FUNCTION: test-flags-CXX
447     # @USAGE: <flags>
448     # @DESCRIPTION:
449     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
450 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
451    
452 dberkholz 1.124 # @FUNCTION: test-flags-F77
453     # @USAGE: <flags>
454     # @DESCRIPTION:
455     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
456     test-flags-F77() { test-flags-PROG "F77" "$@"; }
457    
458     # @FUNCTION: test-flags-FC
459     # @USAGE: <flags>
460     # @DESCRIPTION:
461     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
462     test-flags-FC() { test-flags-PROG "FC" "$@"; }
463    
464 vapier 1.121 # @FUNCTION: test-flags
465     # @USAGE: <flags>
466     # @DESCRIPTION:
467 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
468 azarah 1.100 # its really only present due to the append-flags() abomination.
469 azarah 1.99 test-flags() { test-flags-CC "$@"; }
470    
471 vapier 1.121 # @FUNCTION: test_version_info
472     # @USAGE: <version>
473     # @DESCRIPTION:
474     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
475     # Accepts shell globs.
476 agriffis 1.58 test_version_info() {
477 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
478 agriffis 1.58 return 0
479     else
480     return 1
481     fi
482     }
483    
484 vapier 1.121 # @FUNCTION: strip-unsupported-flags
485     # @DESCRIPTION:
486 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
487 puggy 1.29 strip-unsupported-flags() {
488 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
489     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
490 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
491     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
492 azarah 1.8 }
493    
494 vapier 1.121 # @FUNCTION: get-flag
495     # @USAGE: <flag>
496     # @DESCRIPTION:
497     # Find and echo the value for a particular flag. Accepts shell globs.
498 vapier 1.10 get-flag() {
499 vapier 1.167 local f var findflag="$1"
500 agriffis 1.58
501 vapier 1.36 # this code looks a little flaky but seems to work for
502     # everything we want ...
503     # for example, if CFLAGS="-march=i686":
504 agriffis 1.58 # `get-flag -march` == "-march=i686"
505     # `get-flag march` == "i686"
506 vapier 1.167 for var in $(all-flag-vars) ; do
507     for f in ${!var} ; do
508     if [ "${f/${findflag}}" != "${f}" ] ; then
509     printf "%s\n" "${f/-${findflag}=}"
510     return 0
511     fi
512     done
513 vapier 1.10 done
514 vapier 1.28 return 1
515 joker 1.16 }
516    
517 vapier 1.121 # @FUNCTION: has_m64
518     # @DESCRIPTION:
519     # This doesn't test if the flag is accepted, it tests if the flag actually
520     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
521     # return code is 0, else the return code is 1.
522 lv 1.56 has_m64() {
523 vapier 1.166 eqawarn "${FUNCNAME}: don't use this anymore"
524    
525 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
526     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
527     # please dont replace this function with test_flag in some future
528     # clean-up!
529 swegener 1.101
530 vapier 1.72 local temp="$(emktemp)"
531 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
532 kugelfang 1.74 MY_CC=$(tc-getCC)
533 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
534 vapier 1.72 local ret=$?
535 azarah 1.96 rm -f "${temp}".c
536     [[ ${ret} != 1 ]] && return 0
537 lv 1.62 return 1
538 lv 1.56 }
539    
540     has_m32() {
541 vapier 1.166 die "${FUNCNAME}: don't use this anymore"
542 lv 1.56 }
543    
544 vapier 1.121 # @FUNCTION: replace-sparc64-flags
545     # @DESCRIPTION:
546     # Sets mcpu to v8 and uses the original value as mtune if none specified.
547 vapier 1.18 replace-sparc64-flags() {
548 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
549 joker 1.16
550 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
551 agriffis 1.58 for x in ${SPARC64_CPUS}; do
552 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
553     done
554 mr_bones_ 1.83 else
555 swegener 1.111 for x in ${SPARC64_CPUS}; do
556 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
557     done
558     fi
559 mr_bones_ 1.83
560     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
561 agriffis 1.58 for x in ${SPARC64_CPUS}; do
562 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
563     done
564     else
565 swegener 1.111 for x in ${SPARC64_CPUS}; do
566 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
567     done
568     fi
569 vapier 1.59
570     export CFLAGS CXXFLAGS
571 solar 1.27 }
572    
573 abcd 1.147 # @FUNCTION: append-libs
574     # @USAGE: <libs>
575     # @DESCRIPTION:
576     # Add extra <libs> to the current LIBS.
577     append-libs() {
578 vapier 1.158 [[ $# -eq 0 ]] && return 0
579 abcd 1.147 local flag
580     for flag in "$@"; do
581     [[ ${flag} == -l* ]] && flag=${flag#-l}
582     export LIBS="${LIBS} -l${flag}"
583     done
584    
585     return 0
586     }
587    
588 vapier 1.121 # @FUNCTION: raw-ldflags
589 vapier 1.156 # @USAGE: [flags]
590 vapier 1.121 # @DESCRIPTION:
591 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
592     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
593     # to gcc where it needs the '-Wl,'.
594 vapier 1.156 #
595     # If no flags are specified, then default to ${LDFLAGS}.
596 vapier 1.102 raw-ldflags() {
597     local x input="$@"
598     [[ -z ${input} ]] && input=${LDFLAGS}
599     set --
600     for x in ${input} ; do
601 vapier 1.103 x=${x#-Wl,}
602     set -- "$@" ${x//,/ }
603 vapier 1.102 done
604     echo "$@"
605     }
606    
607 ssuominen 1.145 # @FUNCTION: no-as-needed
608     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
609     no-as-needed() {
610     case $($(tc-getLD) -v 2>&1 </dev/null) in
611     *GNU*) # GNU ld
612     echo "-Wl,--no-as-needed" ;;
613     esac
614     }
615 vapier 1.113
616 vapier 1.160 fi

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