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Revision 1.164 - (hide annotations) (download)
Fri Jan 13 22:40:29 2012 UTC (2 years, 11 months ago) by vapier
Branch: MAIN
Changes since 1.163: +6 -7 lines
have filter-flags filter out LDFLAGS too #395619

1 dirtyepic 1.157 # Copyright 1999-2011 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.164 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.163 2011/12/28 06:28:55 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 kevquinn 1.92 ################ DEPRECATED functions ################
19     # The following are still present to avoid breaking existing
20     # code more than necessary; however they are deprecated. Please
21     # use gcc-specs-* from toolchain-funcs.eclass instead, if you
22     # need to know which hardened techs are active in the compiler.
23     # See bug #100974
24     #
25 vapier 1.121 # has_hardened
26     # has_pie
27     # has_pic
28     # has_ssp_all
29     # has_ssp
30    
31 verwilst 1.3
32 dberkholz 1.124 # {C,CXX,F,FC}FLAGS that we allow in strip-flags
33 vapier 1.117 # Note: shell globs and character lists are allowed
34 vapier 1.36 setup-allowed-flags() {
35 dirtyepic 1.163 ALLOWED_FLAGS="-pipe"
36     ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
37     ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
38     ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
39     ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
40     ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
41     ALLOWED_FLAGS+=" -fno-ident -fpermissive"
42     ALLOWED_FLAGS+=" -W* -w"
43    
44 vapier 1.65 # allow a bunch of flags that negate features / control ABI
45 dirtyepic 1.163 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
46     -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
47     -fno-omit-frame-pointer"
48     ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
49     -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
50     -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
51     -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
52 vapier 1.87 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
53 dirtyepic 1.149 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
54 dirtyepic 1.163 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
55     -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
56     -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
57     -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
58 vapier 1.135
59 dirtyepic 1.148 # 4.5
60 dirtyepic 1.163 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
61 dirtyepic 1.149 # 4.6
62 dirtyepic 1.163 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
63 dirtyepic 1.148
64 dirtyepic 1.163 export ALLOWED_FLAGS
65 vapier 1.36 return 0
66 aliz 1.24 }
67 verwilst 1.13
68 kevquinn 1.105 # inverted filters for hardened compiler. This is trying to unpick
69     # the hardened compiler defaults.
70     _filter-hardened() {
71     local f
72     for f in "$@" ; do
73     case "${f}" in
74     # Ideally we should only concern ourselves with PIE flags,
75     # not -fPIC or -fpic, but too many places filter -fPIC without
76     # thinking about -fPIE.
77     -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
78     gcc-specs-pie || continue
79     is-flagq -nopie || append-flags -nopie;;
80     -fstack-protector)
81     gcc-specs-ssp || continue
82 gengor 1.131 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
83 kevquinn 1.105 -fstack-protector-all)
84     gcc-specs-ssp-to-all || continue
85 gengor 1.131 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
86 gengor 1.128 -fno-strict-overflow)
87     gcc-specs-nostrict || continue
88 gengor 1.131 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
89 solar 1.27 esac
90     done
91 kevquinn 1.105 }
92    
93     # Remove occurrences of strings from variable given in $1
94     # Strings removed are matched as globs, so for example
95     # '-O*' would remove -O1, -O2 etc.
96     _filter-var() {
97     local f x VAR VAL
98     declare -a new
99 vapier 1.36
100 kevquinn 1.105 VAR=$1
101     shift
102     eval VAL=\${${VAR}}
103     for f in ${VAL}; do
104     for x in "$@"; do
105     # Note this should work with globs like -O*
106     [[ ${f} == ${x} ]] && continue 2
107 agriffis 1.61 done
108 kevquinn 1.105 eval new\[\${\#new\[@]}]=\${f}
109 verwilst 1.1 done
110 kevquinn 1.105 eval export ${VAR}=\${new\[*]}
111     }
112 agriffis 1.61
113 vapier 1.121 # @FUNCTION: filter-flags
114     # @USAGE: <flags>
115     # @DESCRIPTION:
116 vapier 1.164 # Remove particular <flags> from {C,CPP,CXX,F,FC,LD}FLAGS. Accepts shell globs.
117 kevquinn 1.105 filter-flags() {
118     _filter-hardened "$@"
119 vapier 1.164 local v
120     for v in C CPP CXX F FC LD ; do
121     _filter-var ${v}FLAGS "$@"
122     done
123 vapier 1.36 return 0
124 verwilst 1.2 }
125    
126 vapier 1.121 # @FUNCTION: filter-lfs-flags
127     # @DESCRIPTION:
128     # Remove flags that enable Large File Support.
129 vapier 1.40 filter-lfs-flags() {
130 vapier 1.154 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
131 vapier 1.153 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
132     # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
133     # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
134     # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
135 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
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 vapier 1.121 # @FUNCTION: append-flags
189     # @USAGE: <flags>
190     # @DESCRIPTION:
191 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
192 vapier 1.18 append-flags() {
193 vapier 1.158 [[ $# -eq 0 ]] && return 0
194 vapier 1.136 append-cflags "$@"
195 vapier 1.138 append-cxxflags "$@"
196 vapier 1.136 append-fflags "$@"
197 vapier 1.28 return 0
198 verwilst 1.1 }
199    
200 vapier 1.121 # @FUNCTION: replace-flags
201     # @USAGE: <old> <new>
202     # @DESCRIPTION:
203     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
204 vapier 1.18 replace-flags() {
205 vapier 1.93 [[ $# != 2 ]] \
206     && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
207     && die "replace-flags takes 2 arguments, not $#"
208    
209 mr_bones_ 1.83 local f fset
210 dirtyepic 1.125 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
211 agriffis 1.64
212 dberkholz 1.124 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
213 agriffis 1.64 # Looping over the flags instead of using a global
214     # substitution ensures that we're working with flag atoms.
215     # Otherwise globs like -O* have the potential to wipe out the
216     # list of flags.
217     for f in ${!fset}; do
218     # Note this should work with globs like -O*
219     [[ ${f} == ${1} ]] && f=${2}
220     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
221     done
222     eval export ${fset}=\${new_${fset}\[*]}
223     done
224    
225 vapier 1.28 return 0
226 danarmak 1.7 }
227    
228 vapier 1.121 # @FUNCTION: replace-cpu-flags
229     # @USAGE: <old> <new>
230     # @DESCRIPTION:
231     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
232     # with flags that select the <new> cpu. Accepts shell globs for <old>.
233 vapier 1.37 replace-cpu-flags() {
234 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
235     while [ $# -gt 1 ] ; do
236 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
237 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
238 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
239     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
240     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
241     shift
242 vapier 1.37 done
243     return 0
244     }
245    
246 vapier 1.113 _is_flagq() {
247 kevquinn 1.105 local x
248 vapier 1.113 for x in ${!1} ; do
249     [[ ${x} == $2 ]] && return 0
250 kevquinn 1.105 done
251     return 1
252     }
253    
254 vapier 1.121 # @FUNCTION: is-flagq
255     # @USAGE: <flag>
256     # @DESCRIPTION:
257 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
258 vapier 1.113 is-flagq() {
259     [[ -n $2 ]] && die "Usage: is-flag <flag>"
260 dberkholz 1.124 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
261 vapier 1.113 }
262    
263 vapier 1.121 # @FUNCTION: is-flag
264     # @USAGE: <flag>
265     # @DESCRIPTION:
266 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
267 danarmak 1.7 is-flag() {
268 vapier 1.113 is-flagq "$@" && echo true
269 kevquinn 1.105 }
270    
271 vapier 1.121 # @FUNCTION: is-ldflagq
272     # @USAGE: <flag>
273     # @DESCRIPTION:
274     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
275 kevquinn 1.105 is-ldflagq() {
276 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
277     _is_flagq LDFLAGS $1
278 verwilst 1.1 }
279 azarah 1.8
280 vapier 1.121 # @FUNCTION: is-ldflag
281     # @USAGE: <flag>
282     # @DESCRIPTION:
283     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
284 kevquinn 1.105 is-ldflag() {
285 vapier 1.113 is-ldflagq "$@" && echo true
286 kevquinn 1.105 }
287    
288 vapier 1.121 # @FUNCTION: filter-mfpmath
289     # @USAGE: <math types>
290     # @DESCRIPTION:
291     # Remove specified math types from the fpmath flag. For example, if the user
292     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
293     # -mfpmath=386.
294 vapier 1.36 filter-mfpmath() {
295 agriffis 1.58 local orig_mfpmath new_math prune_math
296    
297 vapier 1.36 # save the original -mfpmath flag
298 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
299 vapier 1.36 # get the value of the current -mfpmath flag
300 vapier 1.109 new_math=$(get-flag mfpmath)
301     new_math=" ${new_math//,/ } "
302 vapier 1.36 # figure out which math values are to be removed
303 agriffis 1.58 prune_math=""
304 vapier 1.36 for prune_math in "$@" ; do
305 vapier 1.109 new_math=${new_math/ ${prune_math} / }
306 vapier 1.36 done
307 vapier 1.109 new_math=$(echo ${new_math})
308     new_math=${new_math// /,}
309 vapier 1.36
310 vapier 1.109 if [[ -z ${new_math} ]] ; then
311 vapier 1.36 # if we're removing all user specified math values are
312     # slated for removal, then we just filter the flag
313     filter-flags ${orig_mfpmath}
314     else
315     # if we only want to filter some of the user specified
316     # math values, then we replace the current flag
317     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
318     fi
319     return 0
320     }
321    
322 vapier 1.121 # @FUNCTION: strip-flags
323     # @DESCRIPTION:
324     # Strip C[XX]FLAGS of everything except known good/safe flags.
325 azarah 1.8 strip-flags() {
326 dberkholz 1.124 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
327 agriffis 1.58
328 vapier 1.36 setup-allowed-flags
329    
330 azarah 1.8 local NEW_CFLAGS=""
331     local NEW_CXXFLAGS=""
332 dberkholz 1.124 local NEW_FFLAGS=""
333     local NEW_FCFLAGS=""
334 azarah 1.8
335 agriffis 1.58 set -f # disable pathname expansion
336 azarah 1.8
337 agriffis 1.58 for x in ${CFLAGS}; do
338     for y in ${ALLOWED_FLAGS}; do
339 lostlogic 1.14 flag=${x%%=*}
340 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
341 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
342     break
343 azarah 1.8 fi
344     done
345     done
346    
347 agriffis 1.58 for x in ${CXXFLAGS}; do
348     for y in ${ALLOWED_FLAGS}; do
349 lostlogic 1.14 flag=${x%%=*}
350 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
351 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
352     break
353 azarah 1.8 fi
354     done
355     done
356 azarah 1.30
357 dberkholz 1.124 for x in ${FFLAGS}; do
358     for y in ${ALLOWED_FLAGS}; do
359     flag=${x%%=*}
360     if [ "${flag%%${y}}" = "" ] ; then
361     NEW_FFLAGS="${NEW_FFLAGS} ${x}"
362     break
363     fi
364     done
365     done
366    
367     for x in ${FCFLAGS}; do
368     for y in ${ALLOWED_FLAGS}; do
369     flag=${x%%=*}
370     if [ "${flag%%${y}}" = "" ] ; then
371     NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
372     break
373     fi
374     done
375     done
376    
377 azarah 1.30 # In case we filtered out all optimization flags fallback to -O2
378     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
379     NEW_CFLAGS="${NEW_CFLAGS} -O2"
380     fi
381     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
382     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
383     fi
384 dberkholz 1.124 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
385     NEW_FFLAGS="${NEW_FFLAGS} -O2"
386     fi
387     if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
388     NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
389     fi
390 azarah 1.8
391 agriffis 1.58 set +f # re-enable pathname expansion
392 azarah 1.8
393     export CFLAGS="${NEW_CFLAGS}"
394     export CXXFLAGS="${NEW_CXXFLAGS}"
395 dberkholz 1.124 export FFLAGS="${NEW_FFLAGS}"
396     export FCFLAGS="${NEW_FCFLAGS}"
397 vapier 1.36 return 0
398 puggy 1.29 }
399    
400 azarah 1.96 test-flag-PROG() {
401     local comp=$1
402     local flags="$2"
403    
404 vapier 1.152 [[ -z ${comp} || -z ${flags} ]] && return 1
405 azarah 1.96
406 vapier 1.152 # use -c so we can test the assembler as well
407 azarah 1.96 local PROG=$(tc-get${comp})
408 vapier 1.152 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
409 azarah 1.96 > /dev/null 2>&1
410     }
411    
412 vapier 1.121 # @FUNCTION: test-flag-CC
413     # @USAGE: <flag>
414     # @DESCRIPTION:
415     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
416 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
417    
418 vapier 1.121 # @FUNCTION: test-flag-CXX
419     # @USAGE: <flag>
420     # @DESCRIPTION:
421     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
422 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
423    
424 dberkholz 1.124 # @FUNCTION: test-flag-F77
425     # @USAGE: <flag>
426     # @DESCRIPTION:
427     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
428     test-flag-F77() { test-flag-PROG "F77" "$1"; }
429    
430     # @FUNCTION: test-flag-FC
431     # @USAGE: <flag>
432     # @DESCRIPTION:
433     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
434     test-flag-FC() { test-flag-PROG "FC" "$1"; }
435    
436 azarah 1.99 test-flags-PROG() {
437     local comp=$1
438     local flags
439 azarah 1.96 local x
440 azarah 1.99
441     shift
442    
443 vapier 1.113 [[ -z ${comp} ]] && return 1
444 swegener 1.101
445 azarah 1.96 for x in "$@" ; do
446 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
447 azarah 1.96 done
448    
449 azarah 1.99 echo "${flags}"
450 azarah 1.96
451 azarah 1.99 # Just bail if we dont have any flags
452     [[ -n ${flags} ]]
453 azarah 1.96 }
454    
455 vapier 1.121 # @FUNCTION: test-flags-CC
456     # @USAGE: <flags>
457     # @DESCRIPTION:
458     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
459 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
460    
461 vapier 1.121 # @FUNCTION: test-flags-CXX
462     # @USAGE: <flags>
463     # @DESCRIPTION:
464     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
465 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
466    
467 dberkholz 1.124 # @FUNCTION: test-flags-F77
468     # @USAGE: <flags>
469     # @DESCRIPTION:
470     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
471     test-flags-F77() { test-flags-PROG "F77" "$@"; }
472    
473     # @FUNCTION: test-flags-FC
474     # @USAGE: <flags>
475     # @DESCRIPTION:
476     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
477     test-flags-FC() { test-flags-PROG "FC" "$@"; }
478    
479 vapier 1.121 # @FUNCTION: test-flags
480     # @USAGE: <flags>
481     # @DESCRIPTION:
482 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
483 azarah 1.100 # its really only present due to the append-flags() abomination.
484 azarah 1.99 test-flags() { test-flags-CC "$@"; }
485    
486 vapier 1.121 # @FUNCTION: test_version_info
487     # @USAGE: <version>
488     # @DESCRIPTION:
489     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
490     # Accepts shell globs.
491 agriffis 1.58 test_version_info() {
492 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
493 agriffis 1.58 return 0
494     else
495     return 1
496     fi
497     }
498    
499 vapier 1.121 # @FUNCTION: strip-unsupported-flags
500     # @DESCRIPTION:
501 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
502 puggy 1.29 strip-unsupported-flags() {
503 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
504     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
505 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
506     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
507 azarah 1.8 }
508    
509 vapier 1.121 # @FUNCTION: get-flag
510     # @USAGE: <flag>
511     # @DESCRIPTION:
512     # Find and echo the value for a particular flag. Accepts shell globs.
513 vapier 1.10 get-flag() {
514 agriffis 1.58 local f findflag="$1"
515    
516 vapier 1.36 # this code looks a little flaky but seems to work for
517     # everything we want ...
518     # for example, if CFLAGS="-march=i686":
519 agriffis 1.58 # `get-flag -march` == "-march=i686"
520     # `get-flag march` == "i686"
521 dberkholz 1.124 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
522 vapier 1.10 if [ "${f/${findflag}}" != "${f}" ] ; then
523 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
524 vapier 1.28 return 0
525 vapier 1.10 fi
526     done
527 vapier 1.28 return 1
528 joker 1.16 }
529    
530 vapier 1.151 # DEAD FUNCS. Remove by Dec 2011.
531     test_flag() { die "$0: deprecated, please use test-flags()!" ; }
532     has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
533     has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
534     has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
535     has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
536     has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
537 tseng 1.42
538 vapier 1.121 # @FUNCTION: has_m64
539     # @DESCRIPTION:
540     # This doesn't test if the flag is accepted, it tests if the flag actually
541     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
542     # return code is 0, else the return code is 1.
543 lv 1.56 has_m64() {
544 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
545     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
546     # please dont replace this function with test_flag in some future
547     # clean-up!
548 swegener 1.101
549 vapier 1.72 local temp="$(emktemp)"
550 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
551 kugelfang 1.74 MY_CC=$(tc-getCC)
552 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
553 vapier 1.72 local ret=$?
554 azarah 1.96 rm -f "${temp}".c
555     [[ ${ret} != 1 ]] && return 0
556 lv 1.62 return 1
557 lv 1.56 }
558    
559 vapier 1.121 # @FUNCTION: has_m32
560     # @DESCRIPTION:
561     # This doesn't test if the flag is accepted, it tests if the flag actually
562     # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
563     # code is 0, else return code is 1.
564 lv 1.56 has_m32() {
565 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
566     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
567     # please dont replace this function with test_flag in some future
568     # clean-up!
569 eradicator 1.80
570     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
571    
572 vapier 1.95 local temp=$(emktemp)
573     echo "int main() { return(0); }" > "${temp}".c
574 kugelfang 1.74 MY_CC=$(tc-getCC)
575 vapier 1.95 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
576 vapier 1.72 local ret=$?
577 vapier 1.95 rm -f "${temp}".c
578 azarah 1.96 [[ ${ret} != 1 ]] && return 0
579 lv 1.62 return 1
580 lv 1.56 }
581    
582 vapier 1.121 # @FUNCTION: replace-sparc64-flags
583     # @DESCRIPTION:
584     # Sets mcpu to v8 and uses the original value as mtune if none specified.
585 vapier 1.18 replace-sparc64-flags() {
586 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
587 joker 1.16
588 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
589 agriffis 1.58 for x in ${SPARC64_CPUS}; do
590 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
591     done
592 mr_bones_ 1.83 else
593 swegener 1.111 for x in ${SPARC64_CPUS}; do
594 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
595     done
596     fi
597 mr_bones_ 1.83
598     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
599 agriffis 1.58 for x in ${SPARC64_CPUS}; do
600 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
601     done
602     else
603 swegener 1.111 for x in ${SPARC64_CPUS}; do
604 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
605     done
606     fi
607 vapier 1.59
608     export CFLAGS CXXFLAGS
609 solar 1.27 }
610    
611 abcd 1.147 # @FUNCTION: append-libs
612     # @USAGE: <libs>
613     # @DESCRIPTION:
614     # Add extra <libs> to the current LIBS.
615     append-libs() {
616 vapier 1.158 [[ $# -eq 0 ]] && return 0
617 abcd 1.147 local flag
618     for flag in "$@"; do
619     [[ ${flag} == -l* ]] && flag=${flag#-l}
620     export LIBS="${LIBS} -l${flag}"
621     done
622    
623     return 0
624     }
625    
626 vapier 1.121 # @FUNCTION: append-ldflags
627     # @USAGE: <flags>
628     # @DESCRIPTION:
629     # Add extra <flags> to the current LDFLAGS.
630 solar 1.27 append-ldflags() {
631 vapier 1.158 [[ $# -eq 0 ]] && return 0
632 flameeyes 1.123 local flag
633     for flag in "$@"; do
634     [[ ${flag} == -l* ]] && \
635     ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
636     done
637    
638 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
639 vapier 1.28 return 0
640 solar 1.27 }
641    
642 vapier 1.121 # @FUNCTION: filter-ldflags
643     # @USAGE: <flags>
644     # @DESCRIPTION:
645     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
646 solar 1.41 filter-ldflags() {
647 kevquinn 1.105 _filter-var LDFLAGS "$@"
648 solar 1.41 return 0
649     }
650    
651 vapier 1.121 # @FUNCTION: raw-ldflags
652 vapier 1.156 # @USAGE: [flags]
653 vapier 1.121 # @DESCRIPTION:
654 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
655     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
656     # to gcc where it needs the '-Wl,'.
657 vapier 1.156 #
658     # If no flags are specified, then default to ${LDFLAGS}.
659 vapier 1.102 raw-ldflags() {
660     local x input="$@"
661     [[ -z ${input} ]] && input=${LDFLAGS}
662     set --
663     for x in ${input} ; do
664 vapier 1.103 x=${x#-Wl,}
665     set -- "$@" ${x//,/ }
666 vapier 1.102 done
667     echo "$@"
668     }
669    
670 ssuominen 1.145 # @FUNCTION: no-as-needed
671     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
672     no-as-needed() {
673     case $($(tc-getLD) -v 2>&1 </dev/null) in
674     *GNU*) # GNU ld
675     echo "-Wl,--no-as-needed" ;;
676     esac
677     }
678 vapier 1.113
679 vapier 1.160 fi

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