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Revision 1.157 - (hide annotations) (download)
Fri Nov 11 07:06:25 2011 UTC (2 years, 5 months ago) by dirtyepic
Branch: MAIN
Changes since 1.156: +6 -6 lines
Test that appended flags are valid. This allows people to add flags that were unsupported in earlier releases without needing to do version checking.

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 dirtyepic 1.157 # $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.156 2011/10/08 18:37:30 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 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 1.154 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
134 vapier 1.153 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
135     # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
136     # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
137     # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
138 vapier 1.40 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
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     [[ -z $* ]] && return 0
147     export CPPFLAGS="${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 1.136 [[ -z $* ]] && return 0
157 dirtyepic 1.157 export CFLAGS=$(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     [[ -z $* ]] && return 0
167 dirtyepic 1.157 export CXXFLAGS=$(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     [[ -z $* ]] && return 0
177 dirtyepic 1.157 export FFLAGS=$(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 vapier 1.121 # @FUNCTION: append-flags
192     # @USAGE: <flags>
193     # @DESCRIPTION:
194 dberkholz 1.124 # Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
195 vapier 1.18 append-flags() {
196 solar 1.82 [[ -z $* ]] && return 0
197 vapier 1.136 append-cflags "$@"
198 vapier 1.138 append-cxxflags "$@"
199 vapier 1.136 append-fflags "$@"
200 vapier 1.28 return 0
201 verwilst 1.1 }
202    
203 vapier 1.121 # @FUNCTION: replace-flags
204     # @USAGE: <old> <new>
205     # @DESCRIPTION:
206     # Replace the <old> flag with <new>. Accepts shell globs for <old>.
207 vapier 1.18 replace-flags() {
208 vapier 1.93 [[ $# != 2 ]] \
209     && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
210     && die "replace-flags takes 2 arguments, not $#"
211    
212 mr_bones_ 1.83 local f fset
213 dirtyepic 1.125 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
214 agriffis 1.64
215 dberkholz 1.124 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
216 agriffis 1.64 # Looping over the flags instead of using a global
217     # substitution ensures that we're working with flag atoms.
218     # Otherwise globs like -O* have the potential to wipe out the
219     # list of flags.
220     for f in ${!fset}; do
221     # Note this should work with globs like -O*
222     [[ ${f} == ${1} ]] && f=${2}
223     eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
224     done
225     eval export ${fset}=\${new_${fset}\[*]}
226     done
227    
228 vapier 1.28 return 0
229 danarmak 1.7 }
230    
231 vapier 1.121 # @FUNCTION: replace-cpu-flags
232     # @USAGE: <old> <new>
233     # @DESCRIPTION:
234     # Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
235     # with flags that select the <new> cpu. Accepts shell globs for <old>.
236 vapier 1.37 replace-cpu-flags() {
237 vapier 1.70 local newcpu="$#" ; newcpu="${!newcpu}"
238     while [ $# -gt 1 ] ; do
239 agriffis 1.64 # quote to make sure that no globbing is done (particularly on
240 vapier 1.113 # ${oldcpu}) prior to calling replace-flags
241 vapier 1.70 replace-flags "-march=${1}" "-march=${newcpu}"
242     replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
243     replace-flags "-mtune=${1}" "-mtune=${newcpu}"
244     shift
245 vapier 1.37 done
246     return 0
247     }
248    
249 vapier 1.113 _is_flagq() {
250 kevquinn 1.105 local x
251 vapier 1.113 for x in ${!1} ; do
252     [[ ${x} == $2 ]] && return 0
253 kevquinn 1.105 done
254     return 1
255     }
256    
257 vapier 1.121 # @FUNCTION: is-flagq
258     # @USAGE: <flag>
259     # @DESCRIPTION:
260 dberkholz 1.124 # Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
261 vapier 1.113 is-flagq() {
262     [[ -n $2 ]] && die "Usage: is-flag <flag>"
263 dberkholz 1.124 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
264 vapier 1.113 }
265    
266 vapier 1.121 # @FUNCTION: is-flag
267     # @USAGE: <flag>
268     # @DESCRIPTION:
269 dberkholz 1.124 # Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
270 danarmak 1.7 is-flag() {
271 vapier 1.113 is-flagq "$@" && echo true
272 kevquinn 1.105 }
273    
274 vapier 1.121 # @FUNCTION: is-ldflagq
275     # @USAGE: <flag>
276     # @DESCRIPTION:
277     # Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
278 kevquinn 1.105 is-ldflagq() {
279 vapier 1.113 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
280     _is_flagq LDFLAGS $1
281 verwilst 1.1 }
282 azarah 1.8
283 vapier 1.121 # @FUNCTION: is-ldflag
284     # @USAGE: <flag>
285     # @DESCRIPTION:
286     # Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
287 kevquinn 1.105 is-ldflag() {
288 vapier 1.113 is-ldflagq "$@" && echo true
289 kevquinn 1.105 }
290    
291 vapier 1.121 # @FUNCTION: filter-mfpmath
292     # @USAGE: <math types>
293     # @DESCRIPTION:
294     # Remove specified math types from the fpmath flag. For example, if the user
295     # has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
296     # -mfpmath=386.
297 vapier 1.36 filter-mfpmath() {
298 agriffis 1.58 local orig_mfpmath new_math prune_math
299    
300 vapier 1.36 # save the original -mfpmath flag
301 vapier 1.109 orig_mfpmath=$(get-flag -mfpmath)
302 vapier 1.36 # get the value of the current -mfpmath flag
303 vapier 1.109 new_math=$(get-flag mfpmath)
304     new_math=" ${new_math//,/ } "
305 vapier 1.36 # figure out which math values are to be removed
306 agriffis 1.58 prune_math=""
307 vapier 1.36 for prune_math in "$@" ; do
308 vapier 1.109 new_math=${new_math/ ${prune_math} / }
309 vapier 1.36 done
310 vapier 1.109 new_math=$(echo ${new_math})
311     new_math=${new_math// /,}
312 vapier 1.36
313 vapier 1.109 if [[ -z ${new_math} ]] ; then
314 vapier 1.36 # if we're removing all user specified math values are
315     # slated for removal, then we just filter the flag
316     filter-flags ${orig_mfpmath}
317     else
318     # if we only want to filter some of the user specified
319     # math values, then we replace the current flag
320     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
321     fi
322     return 0
323     }
324    
325 vapier 1.121 # @FUNCTION: strip-flags
326     # @DESCRIPTION:
327     # Strip C[XX]FLAGS of everything except known good/safe flags.
328 azarah 1.8 strip-flags() {
329 dberkholz 1.124 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
330 agriffis 1.58
331 vapier 1.36 setup-allowed-flags
332    
333 azarah 1.8 local NEW_CFLAGS=""
334     local NEW_CXXFLAGS=""
335 dberkholz 1.124 local NEW_FFLAGS=""
336     local NEW_FCFLAGS=""
337 azarah 1.8
338 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
339 vapier 1.144 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
340 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
341     fi
342    
343 agriffis 1.58 set -f # disable pathname expansion
344 azarah 1.8
345 agriffis 1.58 for x in ${CFLAGS}; do
346     for y in ${ALLOWED_FLAGS}; do
347 lostlogic 1.14 flag=${x%%=*}
348 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
349 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
350     break
351 azarah 1.8 fi
352     done
353     done
354    
355 agriffis 1.58 for x in ${CXXFLAGS}; do
356     for y in ${ALLOWED_FLAGS}; do
357 lostlogic 1.14 flag=${x%%=*}
358 vapier 1.65 if [ "${flag%%${y}}" = "" ] ; then
359 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
360     break
361 azarah 1.8 fi
362     done
363     done
364 azarah 1.30
365 dberkholz 1.124 for x in ${FFLAGS}; do
366     for y in ${ALLOWED_FLAGS}; do
367     flag=${x%%=*}
368     if [ "${flag%%${y}}" = "" ] ; then
369     NEW_FFLAGS="${NEW_FFLAGS} ${x}"
370     break
371     fi
372     done
373     done
374    
375     for x in ${FCFLAGS}; do
376     for y in ${ALLOWED_FLAGS}; do
377     flag=${x%%=*}
378     if [ "${flag%%${y}}" = "" ] ; then
379     NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
380     break
381     fi
382     done
383     done
384    
385 azarah 1.30 # In case we filtered out all optimization flags fallback to -O2
386     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
387     NEW_CFLAGS="${NEW_CFLAGS} -O2"
388     fi
389     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
390     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
391     fi
392 dberkholz 1.124 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
393     NEW_FFLAGS="${NEW_FFLAGS} -O2"
394     fi
395     if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
396     NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
397     fi
398 azarah 1.8
399 agriffis 1.58 set +f # re-enable pathname expansion
400 azarah 1.8
401     export CFLAGS="${NEW_CFLAGS}"
402     export CXXFLAGS="${NEW_CXXFLAGS}"
403 dberkholz 1.124 export FFLAGS="${NEW_FFLAGS}"
404     export FCFLAGS="${NEW_FCFLAGS}"
405 vapier 1.36 return 0
406 puggy 1.29 }
407    
408 azarah 1.96 test-flag-PROG() {
409     local comp=$1
410     local flags="$2"
411    
412 vapier 1.152 [[ -z ${comp} || -z ${flags} ]] && return 1
413 azarah 1.96
414 vapier 1.152 # use -c so we can test the assembler as well
415 azarah 1.96 local PROG=$(tc-get${comp})
416 vapier 1.152 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
417 azarah 1.96 > /dev/null 2>&1
418     }
419    
420 vapier 1.121 # @FUNCTION: test-flag-CC
421     # @USAGE: <flag>
422     # @DESCRIPTION:
423     # Returns shell true if <flag> is supported by the C compiler, else returns shell false.
424 azarah 1.96 test-flag-CC() { test-flag-PROG "CC" "$1"; }
425    
426 vapier 1.121 # @FUNCTION: test-flag-CXX
427     # @USAGE: <flag>
428     # @DESCRIPTION:
429     # Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
430 azarah 1.96 test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
431    
432 dberkholz 1.124 # @FUNCTION: test-flag-F77
433     # @USAGE: <flag>
434     # @DESCRIPTION:
435     # Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
436     test-flag-F77() { test-flag-PROG "F77" "$1"; }
437    
438     # @FUNCTION: test-flag-FC
439     # @USAGE: <flag>
440     # @DESCRIPTION:
441     # Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
442     test-flag-FC() { test-flag-PROG "FC" "$1"; }
443    
444 azarah 1.99 test-flags-PROG() {
445     local comp=$1
446     local flags
447 azarah 1.96 local x
448 azarah 1.99
449     shift
450    
451 vapier 1.113 [[ -z ${comp} ]] && return 1
452 swegener 1.101
453 vapier 1.113 x=""
454 azarah 1.96 for x in "$@" ; do
455 vapier 1.113 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
456 azarah 1.96 done
457    
458 azarah 1.99 echo "${flags}"
459 azarah 1.96
460 azarah 1.99 # Just bail if we dont have any flags
461     [[ -n ${flags} ]]
462 azarah 1.96 }
463    
464 vapier 1.121 # @FUNCTION: test-flags-CC
465     # @USAGE: <flags>
466     # @DESCRIPTION:
467     # Returns shell true if <flags> are supported by the C compiler, else returns shell false.
468 azarah 1.99 test-flags-CC() { test-flags-PROG "CC" "$@"; }
469    
470 vapier 1.121 # @FUNCTION: test-flags-CXX
471     # @USAGE: <flags>
472     # @DESCRIPTION:
473     # Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
474 azarah 1.99 test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
475    
476 dberkholz 1.124 # @FUNCTION: test-flags-F77
477     # @USAGE: <flags>
478     # @DESCRIPTION:
479     # Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
480     test-flags-F77() { test-flags-PROG "F77" "$@"; }
481    
482     # @FUNCTION: test-flags-FC
483     # @USAGE: <flags>
484     # @DESCRIPTION:
485     # Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
486     test-flags-FC() { test-flags-PROG "FC" "$@"; }
487    
488 vapier 1.121 # @FUNCTION: test-flags
489     # @USAGE: <flags>
490     # @DESCRIPTION:
491 azarah 1.99 # Short-hand that should hopefully work for both C and C++ compiler, but
492 azarah 1.100 # its really only present due to the append-flags() abomination.
493 azarah 1.99 test-flags() { test-flags-CC "$@"; }
494    
495 vapier 1.121 # @FUNCTION: test_version_info
496     # @USAGE: <version>
497     # @DESCRIPTION:
498     # Returns shell true if the current C compiler version matches <version>, else returns shell false.
499     # Accepts shell globs.
500 agriffis 1.58 test_version_info() {
501 vapier 1.75 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
502 agriffis 1.58 return 0
503     else
504     return 1
505     fi
506     }
507    
508 vapier 1.121 # @FUNCTION: strip-unsupported-flags
509     # @DESCRIPTION:
510 dberkholz 1.124 # Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
511 puggy 1.29 strip-unsupported-flags() {
512 vapier 1.113 export CFLAGS=$(test-flags-CC ${CFLAGS})
513     export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
514 dberkholz 1.124 export FFLAGS=$(test-flags-F77 ${FFLAGS})
515     export FCFLAGS=$(test-flags-FC ${FCFLAGS})
516 azarah 1.8 }
517    
518 vapier 1.121 # @FUNCTION: get-flag
519     # @USAGE: <flag>
520     # @DESCRIPTION:
521     # Find and echo the value for a particular flag. Accepts shell globs.
522 vapier 1.10 get-flag() {
523 agriffis 1.58 local f findflag="$1"
524    
525 vapier 1.36 # this code looks a little flaky but seems to work for
526     # everything we want ...
527     # for example, if CFLAGS="-march=i686":
528 agriffis 1.58 # `get-flag -march` == "-march=i686"
529     # `get-flag march` == "i686"
530 dberkholz 1.124 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
531 vapier 1.10 if [ "${f/${findflag}}" != "${f}" ] ; then
532 agriffis 1.58 printf "%s\n" "${f/-${findflag}=}"
533 vapier 1.28 return 0
534 vapier 1.10 fi
535     done
536 vapier 1.28 return 1
537 joker 1.16 }
538    
539 vapier 1.151 # DEAD FUNCS. Remove by Dec 2011.
540     test_flag() { die "$0: deprecated, please use test-flags()!" ; }
541     has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
542     has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
543     has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
544     has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
545     has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
546 tseng 1.42
547 vapier 1.121 # @FUNCTION: has_m64
548     # @DESCRIPTION:
549     # This doesn't test if the flag is accepted, it tests if the flag actually
550     # WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
551     # return code is 0, else the return code is 1.
552 lv 1.56 has_m64() {
553 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
554     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
555     # please dont replace this function with test_flag in some future
556     # clean-up!
557 swegener 1.101
558 vapier 1.72 local temp="$(emktemp)"
559 azarah 1.96 echo "int main() { return(0); }" > "${temp}".c
560 kugelfang 1.74 MY_CC=$(tc-getCC)
561 azarah 1.96 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
562 vapier 1.72 local ret=$?
563 azarah 1.96 rm -f "${temp}".c
564     [[ ${ret} != 1 ]] && return 0
565 lv 1.62 return 1
566 lv 1.56 }
567    
568 vapier 1.121 # @FUNCTION: has_m32
569     # @DESCRIPTION:
570     # This doesn't test if the flag is accepted, it tests if the flag actually
571     # WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
572     # code is 0, else return code is 1.
573 lv 1.56 has_m32() {
574 lv 1.62 # this doesnt test if the flag is accepted, it tests if the flag
575     # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
576     # please dont replace this function with test_flag in some future
577     # clean-up!
578 eradicator 1.80
579     [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
580    
581 vapier 1.95 local temp=$(emktemp)
582     echo "int main() { return(0); }" > "${temp}".c
583 kugelfang 1.74 MY_CC=$(tc-getCC)
584 vapier 1.95 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
585 vapier 1.72 local ret=$?
586 vapier 1.95 rm -f "${temp}".c
587 azarah 1.96 [[ ${ret} != 1 ]] && return 0
588 lv 1.62 return 1
589 lv 1.56 }
590    
591 vapier 1.121 # @FUNCTION: replace-sparc64-flags
592     # @DESCRIPTION:
593     # Sets mcpu to v8 and uses the original value as mtune if none specified.
594 vapier 1.18 replace-sparc64-flags() {
595 fmccor 1.98 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
596 joker 1.16
597 mr_bones_ 1.83 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
598 agriffis 1.58 for x in ${SPARC64_CPUS}; do
599 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
600     done
601 mr_bones_ 1.83 else
602 swegener 1.111 for x in ${SPARC64_CPUS}; do
603 joker 1.16 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
604     done
605     fi
606 mr_bones_ 1.83
607     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
608 agriffis 1.58 for x in ${SPARC64_CPUS}; do
609 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
610     done
611     else
612 swegener 1.111 for x in ${SPARC64_CPUS}; do
613 joker 1.16 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
614     done
615     fi
616 vapier 1.59
617     export CFLAGS CXXFLAGS
618 solar 1.27 }
619    
620 abcd 1.147 # @FUNCTION: append-libs
621     # @USAGE: <libs>
622     # @DESCRIPTION:
623     # Add extra <libs> to the current LIBS.
624     append-libs() {
625     [[ -z $* ]] && return 0
626     local flag
627     for flag in "$@"; do
628     [[ ${flag} == -l* ]] && flag=${flag#-l}
629     export LIBS="${LIBS} -l${flag}"
630     done
631    
632     return 0
633     }
634    
635 vapier 1.121 # @FUNCTION: append-ldflags
636     # @USAGE: <flags>
637     # @DESCRIPTION:
638     # Add extra <flags> to the current LDFLAGS.
639 solar 1.27 append-ldflags() {
640 kevquinn 1.105 [[ -z $* ]] && return 0
641 flameeyes 1.123 local flag
642     for flag in "$@"; do
643     [[ ${flag} == -l* ]] && \
644     ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
645     done
646    
647 vapier 1.59 export LDFLAGS="${LDFLAGS} $*"
648 vapier 1.28 return 0
649 solar 1.27 }
650    
651 vapier 1.121 # @FUNCTION: filter-ldflags
652     # @USAGE: <flags>
653     # @DESCRIPTION:
654     # Remove particular <flags> from LDFLAGS. Accepts shell globs.
655 solar 1.41 filter-ldflags() {
656 kevquinn 1.105 _filter-var LDFLAGS "$@"
657 solar 1.41 return 0
658     }
659    
660 vapier 1.121 # @FUNCTION: raw-ldflags
661 vapier 1.156 # @USAGE: [flags]
662 vapier 1.121 # @DESCRIPTION:
663 kevquinn 1.105 # Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
664     # are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
665     # to gcc where it needs the '-Wl,'.
666 vapier 1.156 #
667     # If no flags are specified, then default to ${LDFLAGS}.
668 vapier 1.102 raw-ldflags() {
669     local x input="$@"
670     [[ -z ${input} ]] && input=${LDFLAGS}
671     set --
672     for x in ${input} ; do
673 vapier 1.103 x=${x#-Wl,}
674     set -- "$@" ${x//,/ }
675 vapier 1.102 done
676     echo "$@"
677     }
678    
679 ssuominen 1.145 # @FUNCTION: no-as-needed
680     # @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
681     no-as-needed() {
682     case $($(tc-getLD) -v 2>&1 </dev/null) in
683     *GNU*) # GNU ld
684     echo "-Wl,--no-as-needed" ;;
685     esac
686     }
687 vapier 1.113
688     # Some tests for when we screw with things and want to make
689     # sure we didn't break anything
690     #TESTS() {
691     # CFLAGS="-a -b -c=1"
692     # CXXFLAGS="-x -y -z=2"
693     # LDFLAGS="-l -m -n=3"
694     #
695     # die() { exit 1; }
696     # (is-flag 1 2 3) && die
697     # (is-ldflag 1 2 3) && die
698     #
699     # is-flagq -l && die
700     # is-ldflagq -a && die
701     # is-flagq -a || die
702     # is-flagq -x || die
703     # is-ldflagq -n=* || die
704     # is-ldflagq -n && die
705     #
706     # strip-unsupported-flags
707     # [[ ${CFLAGS} == "-c=1" ]] || die
708     # [[ ${CXXFLAGS} == "-y -z=2" ]] || die
709     #
710     # echo "All tests pass"
711     #}
712     #TESTS

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