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Revision 1.151 - (hide annotations) (download)
Tue Jul 12 03:58:11 2011 UTC (3 years, 3 months ago) by vapier
Branch: MAIN
Changes since 1.150: +8 -70 lines
turn `ewarn` for dead flags into `die`

1 vapier 1.129 # Copyright 1999-2009 Gentoo Foundation
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.151 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.150 2011/02/25 10:51:44 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 eradicator 1.80 inherit eutils toolchain-funcs multilib
14 vapier 1.72
15 kevquinn 1.92 ################ DEPRECATED functions ################
16     # The following are still present to avoid breaking existing
17     # code more than necessary; however they are deprecated. Please
18     # use gcc-specs-* from toolchain-funcs.eclass instead, if you
19     # need to know which hardened techs are active in the compiler.
20     # See bug #100974
21     #
22 vapier 1.121 # has_hardened
23     # has_pie
24     # has_pic
25     # has_ssp_all
26     # has_ssp
27    
28 verwilst 1.3
29 dberkholz 1.124 # {C,CXX,F,FC}FLAGS that we allow in strip-flags
30 vapier 1.117 # Note: shell globs and character lists are allowed
31 vapier 1.36 setup-allowed-flags() {
32 vapier 1.84 if [[ -z ${ALLOWED_FLAGS} ]] ; then
33 vapier 1.76 export ALLOWED_FLAGS="-pipe"
34     export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
35 vapier 1.87 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
36 solar 1.127 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
37 kevquinn 1.105 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
38 vapier 1.117 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 dirtyepic 1.150 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
40 dberkholz 1.120 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
41 vapier 1.44 fi
42 vapier 1.65 # allow a bunch of flags that negate features / control ABI
43 vapier 1.119 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 vapier 1.135 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
45 vapier 1.87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 dirtyepic 1.139 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47     -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48     -mno-popcnt -mno-abm \
49 vapier 1.140 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
50 vapier 1.87 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 dirtyepic 1.149 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
52 vapier 1.91 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
53 vapier 1.87 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
54     -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
55 vapier 1.114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
56 solar 1.127 -msecure-plt -m*-toc -D* -U*"
57 vapier 1.135
58 dirtyepic 1.148 # 4.5
59     ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 dirtyepic 1.149 # 4.6
61     ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
62     -mno-bmi -mno-tbm"
63 dirtyepic 1.148
64 dberkholz 1.124 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
65 vapier 1.36 # NOTE: currently -Os have issues with gcc3 and K6* arch's
66 vapier 1.106 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
67 vapier 1.36 return 0
68 aliz 1.24 }
69 verwilst 1.13
70 kevquinn 1.105 # inverted filters for hardened compiler. This is trying to unpick
71     # the hardened compiler defaults.
72     _filter-hardened() {
73     local f
74     for f in "$@" ; do
75     case "${f}" in
76     # Ideally we should only concern ourselves with PIE flags,
77     # not -fPIC or -fpic, but too many places filter -fPIC without
78     # thinking about -fPIE.
79     -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
80     gcc-specs-pie || continue
81     is-flagq -nopie || append-flags -nopie;;
82     -fstack-protector)
83     gcc-specs-ssp || continue
84 gengor 1.131 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
85 kevquinn 1.105 -fstack-protector-all)
86     gcc-specs-ssp-to-all || continue
87 gengor 1.131 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 gengor 1.128 -fno-strict-overflow)
89     gcc-specs-nostrict || continue
90 gengor 1.131 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
91 solar 1.27 esac
92     done
93 kevquinn 1.105 }
94    
95     # Remove occurrences of strings from variable given in $1
96     # Strings removed are matched as globs, so for example
97     # '-O*' would remove -O1, -O2 etc.
98     _filter-var() {
99     local f x VAR VAL
100     declare -a new
101 vapier 1.36
102 kevquinn 1.105 VAR=$1
103     shift
104     eval VAL=\${${VAR}}
105     for f in ${VAL}; do
106     for x in "$@"; do
107     # Note this should work with globs like -O*
108     [[ ${f} == ${x} ]] && continue 2
109 agriffis 1.61 done
110 kevquinn 1.105 eval new\[\${\#new\[@]}]=\${f}
111 verwilst 1.1 done
112 kevquinn 1.105 eval export ${VAR}=\${new\[*]}
113     }
114 agriffis 1.61
115 vapier 1.121 # @FUNCTION: filter-flags
116     # @USAGE: <flags>
117     # @DESCRIPTION:
118 dberkholz 1.124 # Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
119 kevquinn 1.105 filter-flags() {
120     _filter-hardened "$@"
121     _filter-var CFLAGS "$@"
122 vapier 1.118 _filter-var CPPFLAGS "$@"
123 kevquinn 1.105 _filter-var CXXFLAGS "$@"
124 dberkholz 1.124 _filter-var FFLAGS "$@"
125     _filter-var FCFLAGS "$@"
126 vapier 1.36 return 0
127 verwilst 1.2 }
128    
129 vapier 1.121 # @FUNCTION: filter-lfs-flags
130     # @DESCRIPTION:
131     # Remove flags that enable Large File Support.
132 vapier 1.40 filter-lfs-flags() {
133 vapier 1.93 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
134 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135     }
136    
137 vapier 1.121 # @FUNCTION: append-cppflags
138     # @USAGE: <flags>
139     # @DESCRIPTION:
140     # Add extra <flags> to the current CPPFLAGS.
141 vapier 1.118 append-cppflags() {
142     [[ -z $* ]] && return 0
143     export CPPFLAGS="${CPPFLAGS} $*"
144     return 0
145     }
146    
147 vapier 1.136 # @FUNCTION: append-cflags
148     # @USAGE: <flags>
149     # @DESCRIPTION:
150     # Add extra <flags> to the current CFLAGS.
151 mr_bones_ 1.137 append-cflags() {
152 vapier 1.136 [[ -z $* ]] && return 0
153     export CFLAGS="${CFLAGS} $*"
154     return 0
155     }
156    
157 gengor 1.132 # @FUNCTION: append-cxxflags
158     # @USAGE: <flags>
159     # @DESCRIPTION:
160     # Add extra <flags> to the current CXXFLAGS.
161     append-cxxflags() {
162     [[ -z $* ]] && return 0
163     export CXXFLAGS="${CXXFLAGS} $*"
164     return 0
165     }
166    
167 dberkholz 1.124 # @FUNCTION: append-fflags
168     # @USAGE: <flags>
169     # @DESCRIPTION:
170     # Add extra <flags> to the current {F,FC}FLAGS.
171     append-fflags() {
172     [[ -z $* ]] && return 0
173     export FFLAGS="${FFLAGS} $*"
174     export FCFLAGS="${FCFLAGS} $*"
175     return 0
176     }
177    
178 vapier 1.121 # @FUNCTION: append-lfs-flags
179     # @DESCRIPTION:
180     # Add flags that enable Large File Support.
181 vapier 1.48 append-lfs-flags() {
182 vapier 1.93 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
183 vapier 1.118 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
184 vapier 1.48 }
185    
186 vapier 1.121 # @FUNCTION: append-flags
187     # @USAGE: <flags>
188     # @DESCRIPTION:
189 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
190 vapier 1.18 append-flags() {
191 solar 1.82 [[ -z $* ]] && return 0
192 vapier 1.136 append-cflags "$@"
193 vapier 1.138 append-cxxflags "$@"
194 vapier 1.136 append-fflags "$@"
195 vapier 1.28 return 0
196 verwilst 1.1 }
197    
198 vapier 1.121 # @FUNCTION: replace-flags
199     # @USAGE: <old> <new>
200     # @DESCRIPTION:
201     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
202 vapier 1.18 replace-flags() {
203 vapier 1.93 [[ $# != 2 ]] \
204     && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
205     && die "replace-flags takes 2 arguments, not $#"
206    
207 mr_bones_ 1.83 local f fset
208 dirtyepic 1.125 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
209 agriffis 1.64
210 dberkholz 1.124 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
211 agriffis 1.64 # Looping over the flags instead of using a global
212     # substitution ensures that we're working with flag atoms.
213     # Otherwise globs like -O* have the potential to wipe out the
214     # list of flags.
215     for f in ${!fset}; do
216     # Note this should work with globs like -O*
217     [[ ${f} == ${1} ]] && f=${2}
218     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
219     done
220     eval export ${fset}=\${new_${fset}\[*]}
221     done
222    
223 vapier 1.28 return 0
224 danarmak 1.7 }
225    
226 vapier 1.121 # @FUNCTION: replace-cpu-flags
227     # @USAGE: <old> <new>
228     # @DESCRIPTION:
229     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
230     # with flags that select the <new> cpu. Accepts shell globs for <old>.
231 vapier 1.37 replace-cpu-flags() {
232 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
233     while [ $# -gt 1 ] ; do
234 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
235 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
236 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
237     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
238     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
239     shift
240 vapier 1.37 done
241     return 0
242     }
243    
244 vapier 1.113 _is_flagq() {
245 kevquinn 1.105 local x
246 vapier 1.113 for x in ${!1} ; do
247     [[ ${x} == $2 ]] && return 0
248 kevquinn 1.105 done
249     return 1
250     }
251    
252 vapier 1.121 # @FUNCTION: is-flagq
253     # @USAGE: <flag>
254     # @DESCRIPTION:
255 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
256 vapier 1.113 is-flagq() {
257     [[ -n $2 ]] && die "Usage: is-flag <flag>"
258 dberkholz 1.124 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
259 vapier 1.113 }
260    
261 vapier 1.121 # @FUNCTION: is-flag
262     # @USAGE: <flag>
263     # @DESCRIPTION:
264 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
265 danarmak 1.7 is-flag() {
266 vapier 1.113 is-flagq "$@" && echo true
267 kevquinn 1.105 }
268    
269 vapier 1.121 # @FUNCTION: is-ldflagq
270     # @USAGE: <flag>
271     # @DESCRIPTION:
272     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
273 kevquinn 1.105 is-ldflagq() {
274 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
275     _is_flagq LDFLAGS $1
276 verwilst 1.1 }
277 azarah 1.8
278 vapier 1.121 # @FUNCTION: is-ldflag
279     # @USAGE: <flag>
280     # @DESCRIPTION:
281     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
282 kevquinn 1.105 is-ldflag() {
283 vapier 1.113 is-ldflagq "$@" && echo true
284 kevquinn 1.105 }
285    
286 vapier 1.121 # @FUNCTION: filter-mfpmath
287     # @USAGE: <math types>
288     # @DESCRIPTION:
289     # Remove specified math types from the fpmath flag. For example, if the user
290     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
291     # -mfpmath=386.
292 vapier 1.36 filter-mfpmath() {
293 agriffis 1.58 local orig_mfpmath new_math prune_math
294    
295 vapier 1.36 # save the original -mfpmath flag
296 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
297 vapier 1.36 # get the value of the current -mfpmath flag
298 vapier 1.109 new_math=$(get-flag mfpmath)
299     new_math=" ${new_math//,/ } "
300 vapier 1.36 # figure out which math values are to be removed
301 agriffis 1.58 prune_math=""
302 vapier 1.36 for prune_math in "$@" ; do
303 vapier 1.109 new_math=${new_math/ ${prune_math} / }
304 vapier 1.36 done
305 vapier 1.109 new_math=$(echo ${new_math})
306     new_math=${new_math// /,}
307 vapier 1.36
308 vapier 1.109 if [[ -z ${new_math} ]] ; then
309 vapier 1.36 # if we're removing all user specified math values are
310     # slated for removal, then we just filter the flag
311     filter-flags ${orig_mfpmath}
312     else
313     # if we only want to filter some of the user specified
314     # math values, then we replace the current flag
315     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
316     fi
317     return 0
318     }
319    
320 vapier 1.121 # @FUNCTION: strip-flags
321     # @DESCRIPTION:
322     # Strip C[XX]FLAGS of everything except known good/safe flags.
323 azarah 1.8 strip-flags() {
324 dberkholz 1.124 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
325 agriffis 1.58
326 vapier 1.36 setup-allowed-flags
327    
328 azarah 1.8 local NEW_CFLAGS=""
329     local NEW_CXXFLAGS=""
330 dberkholz 1.124 local NEW_FFLAGS=""
331     local NEW_FCFLAGS=""
332 azarah 1.8
333 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
334 vapier 1.144 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
335 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
336     fi
337    
338 agriffis 1.58 set -f # disable pathname expansion
339 azarah 1.8
340 agriffis 1.58 for x in ${CFLAGS}; do
341     for y in ${ALLOWED_FLAGS}; do
342 lostlogic 1.14 flag=${x%%=*}
343 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
344 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
345     break
346 azarah 1.8 fi
347     done
348     done
349    
350 agriffis 1.58 for x in ${CXXFLAGS}; do
351     for y in ${ALLOWED_FLAGS}; do
352 lostlogic 1.14 flag=${x%%=*}
353 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
354 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
355     break
356 azarah 1.8 fi
357     done
358     done
359 azarah 1.30
360 dberkholz 1.124 for x in ${FFLAGS}; do
361     for y in ${ALLOWED_FLAGS}; do
362     flag=${x%%=*}
363     if [ "${flag%%${y}}" = "" ] ; then
364     NEW_FFLAGS="${NEW_FFLAGS} ${x}"
365     break
366     fi
367     done
368     done
369    
370     for x in ${FCFLAGS}; do
371     for y in ${ALLOWED_FLAGS}; do
372     flag=${x%%=*}
373     if [ "${flag%%${y}}" = "" ] ; then
374     NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
375     break
376     fi
377     done
378     done
379    
380 azarah 1.30 # In case we filtered out all optimization flags fallback to -O2
381     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
382     NEW_CFLAGS="${NEW_CFLAGS} -O2"
383     fi
384     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
385     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
386     fi
387 dberkholz 1.124 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
388     NEW_FFLAGS="${NEW_FFLAGS} -O2"
389     fi
390     if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
391     NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
392     fi
393 azarah 1.8
394 agriffis 1.58 set +f # re-enable pathname expansion
395 azarah 1.8
396     export CFLAGS="${NEW_CFLAGS}"
397     export CXXFLAGS="${NEW_CXXFLAGS}"
398 dberkholz 1.124 export FFLAGS="${NEW_FFLAGS}"
399     export FCFLAGS="${NEW_FCFLAGS}"
400 vapier 1.36 return 0
401 puggy 1.29 }
402    
403 azarah 1.96 test-flag-PROG() {
404     local comp=$1
405     local flags="$2"
406    
407     [[ -z ${comp} || -z ${flags} ]] && \
408     return 1
409    
410     local PROG=$(tc-get${comp})
411     ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
412     > /dev/null 2>&1
413     }
414    
415 vapier 1.121 # @FUNCTION: test-flag-CC
416     # @USAGE: <flag>
417     # @DESCRIPTION:
418     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
419 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
420    
421 vapier 1.121 # @FUNCTION: test-flag-CXX
422     # @USAGE: <flag>
423     # @DESCRIPTION:
424     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
425 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
426    
427 dberkholz 1.124 # @FUNCTION: test-flag-F77
428     # @USAGE: <flag>
429     # @DESCRIPTION:
430     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
431     test-flag-F77() { test-flag-PROG "F77" "$1"; }
432    
433     # @FUNCTION: test-flag-FC
434     # @USAGE: <flag>
435     # @DESCRIPTION:
436     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
437     test-flag-FC() { test-flag-PROG "FC" "$1"; }
438    
439 azarah 1.99 test-flags-PROG() {
440     local comp=$1
441     local flags
442 azarah 1.96 local x
443 azarah 1.99
444     shift
445    
446 vapier 1.113 [[ -z ${comp} ]] && return 1
447 swegener 1.101
448 vapier 1.113 x=""
449 azarah 1.96 for x in "$@" ; do
450 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
451 azarah 1.96 done
452    
453 azarah 1.99 echo "${flags}"
454 azarah 1.96
455 azarah 1.99 # Just bail if we dont have any flags
456     [[ -n ${flags} ]]
457 azarah 1.96 }
458    
459 vapier 1.121 # @FUNCTION: test-flags-CC
460     # @USAGE: <flags>
461     # @DESCRIPTION:
462     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
463 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
464    
465 vapier 1.121 # @FUNCTION: test-flags-CXX
466     # @USAGE: <flags>
467     # @DESCRIPTION:
468     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
469 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
470    
471 dberkholz 1.124 # @FUNCTION: test-flags-F77
472     # @USAGE: <flags>
473     # @DESCRIPTION:
474     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
475     test-flags-F77() { test-flags-PROG "F77" "$@"; }
476    
477     # @FUNCTION: test-flags-FC
478     # @USAGE: <flags>
479     # @DESCRIPTION:
480     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
481     test-flags-FC() { test-flags-PROG "FC" "$@"; }
482    
483 vapier 1.121 # @FUNCTION: test-flags
484     # @USAGE: <flags>
485     # @DESCRIPTION:
486 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
487 azarah 1.100 # its really only present due to the append-flags() abomination.
488 azarah 1.99 test-flags() { test-flags-CC "$@"; }
489    
490 vapier 1.121 # @FUNCTION: test_version_info
491     # @USAGE: <version>
492     # @DESCRIPTION:
493     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
494     # Accepts shell globs.
495 agriffis 1.58 test_version_info() {
496 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
497 agriffis 1.58 return 0
498     else
499     return 1
500     fi
501     }
502    
503 vapier 1.121 # @FUNCTION: strip-unsupported-flags
504     # @DESCRIPTION:
505 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
506 puggy 1.29 strip-unsupported-flags() {
507 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
508     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
509 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
510     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
511 azarah 1.8 }
512    
513 vapier 1.121 # @FUNCTION: get-flag
514     # @USAGE: <flag>
515     # @DESCRIPTION:
516     # Find and echo the value for a particular flag. Accepts shell globs.
517 vapier 1.10 get-flag() {
518 agriffis 1.58 local f findflag="$1"
519    
520 vapier 1.36 # this code looks a little flaky but seems to work for
521     # everything we want ...
522     # for example, if CFLAGS="-march=i686":
523 agriffis 1.58 # `get-flag -march` == "-march=i686"
524     # `get-flag march` == "i686"
525 dberkholz 1.124 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
526 vapier 1.10 if [ "${f/${findflag}}" != "${f}" ] ; then
527 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
528 vapier 1.28 return 0
529 vapier 1.10 fi
530     done
531 vapier 1.28 return 1
532 joker 1.16 }
533    
534 vapier 1.151 # DEAD FUNCS. Remove by Dec 2011.
535     test_flag() { die "$0: deprecated, please use test-flags()!" ; }
536     has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
537     has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
538     has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
539     has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
540     has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
541 tseng 1.42
542 vapier 1.121 # @FUNCTION: has_m64
543     # @DESCRIPTION:
544     # This doesn't test if the flag is accepted, it tests if the flag actually
545     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
546     # return code is 0, else the return code is 1.
547 lv 1.56 has_m64() {
548 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
549     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
550     # please dont replace this function with test_flag in some future
551     # clean-up!
552 swegener 1.101
553 vapier 1.72 local temp="$(emktemp)"
554 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
555 kugelfang 1.74 MY_CC=$(tc-getCC)
556 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
557 vapier 1.72 local ret=$?
558 azarah 1.96 rm -f "${temp}".c
559     [[ ${ret} != 1 ]] && return 0
560 lv 1.62 return 1
561 lv 1.56 }
562    
563 vapier 1.121 # @FUNCTION: has_m32
564     # @DESCRIPTION:
565     # This doesn't test if the flag is accepted, it tests if the flag actually
566     # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
567     # code is 0, else return code is 1.
568 lv 1.56 has_m32() {
569 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
570     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
571     # please dont replace this function with test_flag in some future
572     # clean-up!
573 eradicator 1.80
574     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
575    
576 vapier 1.95 local temp=$(emktemp)
577     echo "int main() { return(0); }" > "${temp}".c
578 kugelfang 1.74 MY_CC=$(tc-getCC)
579 vapier 1.95 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
580 vapier 1.72 local ret=$?
581 vapier 1.95 rm -f "${temp}".c
582 azarah 1.96 [[ ${ret} != 1 ]] && return 0
583 lv 1.62 return 1
584 lv 1.56 }
585    
586 vapier 1.121 # @FUNCTION: replace-sparc64-flags
587     # @DESCRIPTION:
588     # Sets mcpu to v8 and uses the original value as mtune if none specified.
589 vapier 1.18 replace-sparc64-flags() {
590 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
591 joker 1.16
592 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
593 agriffis 1.58 for x in ${SPARC64_CPUS}; do
594 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
595     done
596 mr_bones_ 1.83 else
597 swegener 1.111 for x in ${SPARC64_CPUS}; do
598 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
599     done
600     fi
601 mr_bones_ 1.83
602     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
603 agriffis 1.58 for x in ${SPARC64_CPUS}; do
604 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
605     done
606     else
607 swegener 1.111 for x in ${SPARC64_CPUS}; do
608 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
609     done
610     fi
611 vapier 1.59
612     export CFLAGS CXXFLAGS
613 solar 1.27 }
614    
615 abcd 1.147 # @FUNCTION: append-libs
616     # @USAGE: <libs>
617     # @DESCRIPTION:
618     # Add extra <libs> to the current LIBS.
619     append-libs() {
620     [[ -z $* ]] && return 0
621     local flag
622     for flag in "$@"; do
623     [[ ${flag} == -l* ]] && flag=${flag#-l}
624     export LIBS="${LIBS} -l${flag}"
625     done
626    
627     return 0
628     }
629    
630 vapier 1.121 # @FUNCTION: append-ldflags
631     # @USAGE: <flags>
632     # @DESCRIPTION:
633     # Add extra <flags> to the current LDFLAGS.
634 solar 1.27 append-ldflags() {
635 kevquinn 1.105 [[ -z $* ]] && return 0
636 flameeyes 1.123 local flag
637     for flag in "$@"; do
638     [[ ${flag} == -l* ]] && \
639     ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
640     done
641    
642 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
643 vapier 1.28 return 0
644 solar 1.27 }
645    
646 vapier 1.121 # @FUNCTION: filter-ldflags
647     # @USAGE: <flags>
648     # @DESCRIPTION:
649     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
650 solar 1.41 filter-ldflags() {
651 kevquinn 1.105 _filter-var LDFLAGS "$@"
652 solar 1.41 return 0
653     }
654    
655 vapier 1.121 # @FUNCTION: raw-ldflags
656     # @USAGE: <flags>
657     # @DESCRIPTION:
658 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
659     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
660     # to gcc where it needs the '-Wl,'.
661 vapier 1.102 raw-ldflags() {
662     local x input="$@"
663     [[ -z ${input} ]] && input=${LDFLAGS}
664     set --
665     for x in ${input} ; do
666 vapier 1.103 x=${x#-Wl,}
667     set -- "$@" ${x//,/ }
668 vapier 1.102 done
669     echo "$@"
670     }
671    
672 ssuominen 1.145 # @FUNCTION: no-as-needed
673     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
674     no-as-needed() {
675     case $($(tc-getLD) -v 2>&1 </dev/null) in
676     *GNU*) # GNU ld
677     echo "-Wl,--no-as-needed" ;;
678     esac
679     }
680 vapier 1.113
681     # Some tests for when we screw with things and want to make
682     # sure we didn't break anything
683     #TESTS() {
684     # CFLAGS="-a -b -c=1"
685     # CXXFLAGS="-x -y -z=2"
686     # LDFLAGS="-l -m -n=3"
687     #
688     # die() { exit 1; }
689     # (is-flag 1 2 3) && die
690     # (is-ldflag 1 2 3) && die
691     #
692     # is-flagq -l && die
693     # is-ldflagq -a && die
694     # is-flagq -a || die
695     # is-flagq -x || die
696     # is-ldflagq -n=* || die
697     # is-ldflagq -n && die
698     #
699     # strip-unsupported-flags
700     # [[ ${CFLAGS} == "-c=1" ]] || die
701     # [[ ${CXXFLAGS} == "-y -z=2" ]] || die
702     #
703     # echo "All tests pass"
704     #}
705     #TESTS

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