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Revision 1.11 Revision 1.160
1# Copyright 1999-2002 Gentoo Technologies, Inc. 1# Copyright 1999-2011 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# Author Bart Verwilst <verwilst@gentoo.org>
4# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.11 2002/12/22 12:11:56 cretin Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.160 2011/12/10 20:03:17 vapier Exp $
5 4
6ECLASS=flag-o-matic 5# @ECLASS: flag-o-matic.eclass
7INHERITED="$INHERITED $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.
8 12
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
16inherit eutils toolchain-funcs multilib
17
18################ 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
9# 24#
10#### filter-flags <flag> #### 25# has_hardened
11# Remove particular flags from C[XX]FLAGS 26# has_pie
12# 27# has_pic
13#### append-flags <flag> #### 28# has_ssp_all
14# Add extra flags to your current C[XX]FLAGS 29# has_ssp
15#
16#### replace-flags <orig.flag> <new.flag> ###
17# Replace a flag by another one
18#
19#### is-flag <flag> ####
20# Returns "true" if flag is set in C[XX]FLAGS
21# Matches only complete flag
22#
23#### strip-flags ####
24# Strip C[XX]FLAGS of everything except known
25# good options.
26#
27#### get-flag <flag> ####
28# Find and echo the value for a particular flag
29#
30 30
31
32# {C,CXX,F,FC}FLAGS that we allow in strip-flags
33# Note: shell globs and character lists are allowed
34setup-allowed-flags() {
35 if [[ -z ${ALLOWED_FLAGS} ]] ; then
36 export ALLOWED_FLAGS="-pipe"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
41 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
42 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident -fpermissive"
43 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
44 fi
45 # allow a bunch of flags that negate features / control ABI
46 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
47 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
48 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
49 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
50 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
51 -mno-popcnt -mno-abm \
52 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
53 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
54 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
55 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
56 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
57 -m32 -m64 -mx32 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
58 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
59 -msecure-plt -m*-toc -D* -U*"
60
61 # 4.5
62 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
63 # 4.6
64 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
65 -mno-bmi -mno-tbm"
66
67 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
68 # NOTE: currently -Os have issues with gcc3 and K6* arch's
69 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
70 return 0
71}
72
73# inverted filters for hardened compiler. This is trying to unpick
74# the hardened compiler defaults.
75_filter-hardened() {
76 local f
77 for f in "$@" ; do
78 case "${f}" in
79 # Ideally we should only concern ourselves with PIE flags,
80 # not -fPIC or -fpic, but too many places filter -fPIC without
81 # thinking about -fPIE.
82 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
83 gcc-specs-pie || continue
84 is-flagq -nopie || append-flags -nopie;;
85 -fstack-protector)
86 gcc-specs-ssp || continue
87 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
88 -fstack-protector-all)
89 gcc-specs-ssp-to-all || continue
90 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
91 -fno-strict-overflow)
92 gcc-specs-nostrict || continue
93 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
94 esac
95 done
96}
97
98# Remove occurrences of strings from variable given in $1
99# Strings removed are matched as globs, so for example
100# '-O*' would remove -O1, -O2 etc.
101_filter-var() {
102 local f x VAR VAL
103 declare -a new
104
105 VAR=$1
106 shift
107 eval VAL=\${${VAR}}
108 for f in ${VAL}; do
109 for x in "$@"; do
110 # Note this should work with globs like -O*
111 [[ ${f} == ${x} ]] && continue 2
112 done
113 eval new\[\${\#new\[@]}]=\${f}
114 done
115 eval export ${VAR}=\${new\[*]}
116}
117
118# @FUNCTION: filter-flags
119# @USAGE: <flags>
120# @DESCRIPTION:
121# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
31filter-flags () { 122filter-flags() {
123 _filter-hardened "$@"
124 _filter-var CFLAGS "$@"
125 _filter-var CPPFLAGS "$@"
126 _filter-var CXXFLAGS "$@"
127 _filter-var FFLAGS "$@"
128 _filter-var FCFLAGS "$@"
129 return 0
130}
32 131
33 for x in $1 132# @FUNCTION: filter-lfs-flags
34 do 133# @DESCRIPTION:
134# Remove flags that enable Large File Support.
135filter-lfs-flags() {
136 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
137 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
138 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
139 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
140 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
141 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
142}
143
144# @FUNCTION: append-cppflags
145# @USAGE: <flags>
146# @DESCRIPTION:
147# Add extra <flags> to the current CPPFLAGS.
148append-cppflags() {
149 [[ $# -eq 0 ]] && return 0
35 export CFLAGS="${CFLAGS/${x}}" 150 export CPPFLAGS="${CPPFLAGS} $*"
36 export CXXFLAGS="${CXXFLAGS/${x}}" 151 return 0
37 done
38
39} 152}
40 153
154# @FUNCTION: append-cflags
155# @USAGE: <flags>
156# @DESCRIPTION:
157# Add extra <flags> to the current CFLAGS.
158append-cflags() {
159 [[ $# -eq 0 ]] && return 0
160 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
161 return 0
162}
163
164# @FUNCTION: append-cxxflags
165# @USAGE: <flags>
166# @DESCRIPTION:
167# Add extra <flags> to the current CXXFLAGS.
168append-cxxflags() {
169 [[ $# -eq 0 ]] && return 0
170 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
171 return 0
172}
173
174# @FUNCTION: append-fflags
175# @USAGE: <flags>
176# @DESCRIPTION:
177# Add extra <flags> to the current {F,FC}FLAGS.
178append-fflags() {
179 [[ $# -eq 0 ]] && return 0
180 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
181 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
182 return 0
183}
184
185# @FUNCTION: append-lfs-flags
186# @DESCRIPTION:
187# Add flags that enable Large File Support.
188append-lfs-flags() {
189 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
190 # see comments in filter-lfs-flags func for meaning of these
191 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
192}
193
194# @FUNCTION: append-flags
195# @USAGE: <flags>
196# @DESCRIPTION:
197# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
41append-flags () { 198append-flags() {
42 199 [[ $# -eq 0 ]] && return 0
43 CFLAGS="${CFLAGS} $1" 200 append-cflags "$@"
44 CXXFLAGS="${CXXFLAGS} $1" 201 append-cxxflags "$@"
45 202 append-fflags "$@"
203 return 0
46} 204}
47 205
206# @FUNCTION: replace-flags
207# @USAGE: <old> <new>
208# @DESCRIPTION:
209# Replace the <old> flag with <new>. Accepts shell globs for <old>.
48replace-flags () { 210replace-flags() {
211 [[ $# != 2 ]] \
212 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
213 && die "replace-flags takes 2 arguments, not $#"
49 214
50 CFLAGS="${CFLAGS/${1}/${2} }" 215 local f fset
51 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 216 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
52 217
53} 218 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
219 # Looping over the flags instead of using a global
220 # substitution ensures that we're working with flag atoms.
221 # Otherwise globs like -O* have the potential to wipe out the
222 # list of flags.
223 for f in ${!fset}; do
224 # Note this should work with globs like -O*
225 [[ ${f} == ${1} ]] && f=${2}
226 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
227 done
228 eval export ${fset}=\${new_${fset}\[*]}
229 done
54 230
231 return 0
232}
233
234# @FUNCTION: replace-cpu-flags
235# @USAGE: <old> <new>
236# @DESCRIPTION:
237# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
238# with flags that select the <new> cpu. Accepts shell globs for <old>.
239replace-cpu-flags() {
240 local newcpu="$#" ; newcpu="${!newcpu}"
241 while [ $# -gt 1 ] ; do
242 # quote to make sure that no globbing is done (particularly on
243 # ${oldcpu}) prior to calling replace-flags
244 replace-flags "-march=${1}" "-march=${newcpu}"
245 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
246 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
247 shift
248 done
249 return 0
250}
251
252_is_flagq() {
253 local x
254 for x in ${!1} ; do
255 [[ ${x} == $2 ]] && return 0
256 done
257 return 1
258}
259
260# @FUNCTION: is-flagq
261# @USAGE: <flag>
262# @DESCRIPTION:
263# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
264is-flagq() {
265 [[ -n $2 ]] && die "Usage: is-flag <flag>"
266 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
267}
268
269# @FUNCTION: is-flag
270# @USAGE: <flag>
271# @DESCRIPTION:
272# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
55is-flag() { 273is-flag() {
274 is-flagq "$@" && echo true
275}
56 276
57 for x in ${CFLAGS} ${CXXFLAGS} 277# @FUNCTION: is-ldflagq
278# @USAGE: <flag>
279# @DESCRIPTION:
280# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
281is-ldflagq() {
282 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
283 _is_flagq LDFLAGS $1
284}
285
286# @FUNCTION: is-ldflag
287# @USAGE: <flag>
288# @DESCRIPTION:
289# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
290is-ldflag() {
291 is-ldflagq "$@" && echo true
292}
293
294# @FUNCTION: filter-mfpmath
295# @USAGE: <math types>
296# @DESCRIPTION:
297# Remove specified math types from the fpmath flag. For example, if the user
298# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
299# -mfpmath=386.
300filter-mfpmath() {
301 local orig_mfpmath new_math prune_math
302
303 # save the original -mfpmath flag
304 orig_mfpmath=$(get-flag -mfpmath)
305 # get the value of the current -mfpmath flag
306 new_math=$(get-flag mfpmath)
307 new_math=" ${new_math//,/ } "
308 # figure out which math values are to be removed
309 prune_math=""
310 for prune_math in "$@" ; do
311 new_math=${new_math/ ${prune_math} / }
58 do 312 done
59 if [ "${x}" = "$1" ] 313 new_math=$(echo ${new_math})
60 then 314 new_math=${new_math// /,}
61 echo true
62 break
63 fi
64 done
65 315
316 if [[ -z ${new_math} ]] ; then
317 # if we're removing all user specified math values are
318 # slated for removal, then we just filter the flag
319 filter-flags ${orig_mfpmath}
320 else
321 # if we only want to filter some of the user specified
322 # math values, then we replace the current flag
323 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
324 fi
325 return 0
66} 326}
67 327
328# @FUNCTION: strip-flags
329# @DESCRIPTION:
330# Strip C[XX]FLAGS of everything except known good/safe flags.
68strip-flags() { 331strip-flags() {
332 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
333
334 setup-allowed-flags
69 335
70 local NEW_CFLAGS="" 336 local NEW_CFLAGS=""
71 local NEW_CXXFLAGS="" 337 local NEW_CXXFLAGS=""
338 local NEW_FFLAGS=""
339 local NEW_FCFLAGS=""
72 340
73 local ALLOWED_FLAGS="-O -mcpu -march -pipe -g" 341 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
342 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
343 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
344 fi
74 345
75 set -f 346 set -f # disable pathname expansion
76 347
77 for x in ${CFLAGS} 348 for x in ${CFLAGS}; do
78 do
79 for y in ${ALLOWED_FLAGS} 349 for y in ${ALLOWED_FLAGS}; do
80 do 350 flag=${x%%=*}
81 if [ "${x/${y}}" != "${x}" ] 351 if [ "${flag%%${y}}" = "" ] ; then
82 then
83 if [ -z "${NEW_CFLAGS}" ]
84 then
85 NEW_CFLAGS="${x}"
86 else
87 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 352 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
88 fi 353 break
89 fi 354 fi
90 done 355 done
91 done 356 done
92 357
93 for x in ${CXXFLAGS} 358 for x in ${CXXFLAGS}; do
94 do
95 for y in ${ALLOWED_FLAGS} 359 for y in ${ALLOWED_FLAGS}; do
96 do 360 flag=${x%%=*}
97 if [ "${x/${y}}" != "${x}" ] 361 if [ "${flag%%${y}}" = "" ] ; then
98 then
99 if [ -z "${NEW_CXXFLAGS}" ]
100 then
101 NEW_CXXFLAGS="${x}"
102 else
103 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 362 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
104 fi 363 break
105 fi 364 fi
106 done 365 done
107 done 366 done
108 367
109 set +f 368 for x in ${FFLAGS}; do
369 for y in ${ALLOWED_FLAGS}; do
370 flag=${x%%=*}
371 if [ "${flag%%${y}}" = "" ] ; then
372 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
373 break
374 fi
375 done
376 done
377
378 for x in ${FCFLAGS}; do
379 for y in ${ALLOWED_FLAGS}; do
380 flag=${x%%=*}
381 if [ "${flag%%${y}}" = "" ] ; then
382 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
383 break
384 fi
385 done
386 done
387
388 # In case we filtered out all optimization flags fallback to -O2
389 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
390 NEW_CFLAGS="${NEW_CFLAGS} -O2"
391 fi
392 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
393 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
394 fi
395 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
396 NEW_FFLAGS="${NEW_FFLAGS} -O2"
397 fi
398 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
399 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
400 fi
401
402 set +f # re-enable pathname expansion
110 403
111 export CFLAGS="${NEW_CFLAGS}" 404 export CFLAGS="${NEW_CFLAGS}"
112 export CXXFLAGS="${NEW_CXXFLAGS}" 405 export CXXFLAGS="${NEW_CXXFLAGS}"
406 export FFLAGS="${NEW_FFLAGS}"
407 export FCFLAGS="${NEW_FCFLAGS}"
408 return 0
113} 409}
114 410
411test-flag-PROG() {
412 local comp=$1
413 local flags="$2"
414
415 [[ -z ${comp} || -z ${flags} ]] && return 1
416
417 # use -c so we can test the assembler as well
418 local PROG=$(tc-get${comp})
419 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
420 > /dev/null 2>&1
421}
422
423# @FUNCTION: test-flag-CC
424# @USAGE: <flag>
425# @DESCRIPTION:
426# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
427test-flag-CC() { test-flag-PROG "CC" "$1"; }
428
429# @FUNCTION: test-flag-CXX
430# @USAGE: <flag>
431# @DESCRIPTION:
432# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
433test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
434
435# @FUNCTION: test-flag-F77
436# @USAGE: <flag>
437# @DESCRIPTION:
438# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
439test-flag-F77() { test-flag-PROG "F77" "$1"; }
440
441# @FUNCTION: test-flag-FC
442# @USAGE: <flag>
443# @DESCRIPTION:
444# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
445test-flag-FC() { test-flag-PROG "FC" "$1"; }
446
447test-flags-PROG() {
448 local comp=$1
449 local flags
450 local x
451
452 shift
453
454 [[ -z ${comp} ]] && return 1
455
456 for x in "$@" ; do
457 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
458 done
459
460 echo "${flags}"
461
462 # Just bail if we dont have any flags
463 [[ -n ${flags} ]]
464}
465
466# @FUNCTION: test-flags-CC
467# @USAGE: <flags>
468# @DESCRIPTION:
469# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
470test-flags-CC() { test-flags-PROG "CC" "$@"; }
471
472# @FUNCTION: test-flags-CXX
473# @USAGE: <flags>
474# @DESCRIPTION:
475# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
476test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
477
478# @FUNCTION: test-flags-F77
479# @USAGE: <flags>
480# @DESCRIPTION:
481# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
482test-flags-F77() { test-flags-PROG "F77" "$@"; }
483
484# @FUNCTION: test-flags-FC
485# @USAGE: <flags>
486# @DESCRIPTION:
487# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
488test-flags-FC() { test-flags-PROG "FC" "$@"; }
489
490# @FUNCTION: test-flags
491# @USAGE: <flags>
492# @DESCRIPTION:
493# Short-hand that should hopefully work for both C and C++ compiler, but
494# its really only present due to the append-flags() abomination.
495test-flags() { test-flags-CC "$@"; }
496
497# @FUNCTION: test_version_info
498# @USAGE: <version>
499# @DESCRIPTION:
500# Returns shell true if the current C compiler version matches <version>, else returns shell false.
501# Accepts shell globs.
502test_version_info() {
503 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
504 return 0
505 else
506 return 1
507 fi
508}
509
510# @FUNCTION: strip-unsupported-flags
511# @DESCRIPTION:
512# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
513strip-unsupported-flags() {
514 export CFLAGS=$(test-flags-CC ${CFLAGS})
515 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
516 export FFLAGS=$(test-flags-F77 ${FFLAGS})
517 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
518}
519
520# @FUNCTION: get-flag
521# @USAGE: <flag>
522# @DESCRIPTION:
523# Find and echo the value for a particular flag. Accepts shell globs.
115get-flag() { 524get-flag() {
116 local findflag="$1" 525 local f findflag="$1"
117 526
527 # this code looks a little flaky but seems to work for
528 # everything we want ...
529 # for example, if CFLAGS="-march=i686":
530 # `get-flag -march` == "-march=i686"
531 # `get-flag march` == "i686"
118 for f in ${CFLAGS} ${CXXFLAGS} ; do 532 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
119 if [ "${f/${findflag}}" != "${f}" ] ; then 533 if [ "${f/${findflag}}" != "${f}" ] ; then
120 echo "${f/-${findflag}=}" 534 printf "%s\n" "${f/-${findflag}=}"
121 return 535 return 0
122 fi 536 fi
123 done 537 done
538 return 1
124} 539}
540
541# DEAD FUNCS. Remove by Dec 2011.
542test_flag() { die "$0: deprecated, please use test-flags()!" ; }
543has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
544has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
545has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
546has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
547has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
548
549# @FUNCTION: has_m64
550# @DESCRIPTION:
551# This doesn't test if the flag is accepted, it tests if the flag actually
552# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
553# return code is 0, else the return code is 1.
554has_m64() {
555 # this doesnt test if the flag is accepted, it tests if the flag
556 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
557 # please dont replace this function with test_flag in some future
558 # clean-up!
559
560 local temp="$(emktemp)"
561 echo "int main() { return(0); }" > "${temp}".c
562 MY_CC=$(tc-getCC)
563 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
564 local ret=$?
565 rm -f "${temp}".c
566 [[ ${ret} != 1 ]] && return 0
567 return 1
568}
569
570# @FUNCTION: has_m32
571# @DESCRIPTION:
572# This doesn't test if the flag is accepted, it tests if the flag actually
573# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
574# code is 0, else return code is 1.
575has_m32() {
576 # this doesnt test if the flag is accepted, it tests if the flag
577 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
578 # please dont replace this function with test_flag in some future
579 # clean-up!
580
581 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
582
583 local temp=$(emktemp)
584 echo "int main() { return(0); }" > "${temp}".c
585 MY_CC=$(tc-getCC)
586 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
587 local ret=$?
588 rm -f "${temp}".c
589 [[ ${ret} != 1 ]] && return 0
590 return 1
591}
592
593# @FUNCTION: replace-sparc64-flags
594# @DESCRIPTION:
595# Sets mcpu to v8 and uses the original value as mtune if none specified.
596replace-sparc64-flags() {
597 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
598
599 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
600 for x in ${SPARC64_CPUS}; do
601 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
602 done
603 else
604 for x in ${SPARC64_CPUS}; do
605 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
606 done
607 fi
608
609 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
610 for x in ${SPARC64_CPUS}; do
611 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
612 done
613 else
614 for x in ${SPARC64_CPUS}; do
615 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
616 done
617 fi
618
619 export CFLAGS CXXFLAGS
620}
621
622# @FUNCTION: append-libs
623# @USAGE: <libs>
624# @DESCRIPTION:
625# Add extra <libs> to the current LIBS.
626append-libs() {
627 [[ $# -eq 0 ]] && return 0
628 local flag
629 for flag in "$@"; do
630 [[ ${flag} == -l* ]] && flag=${flag#-l}
631 export LIBS="${LIBS} -l${flag}"
632 done
633
634 return 0
635}
636
637# @FUNCTION: append-ldflags
638# @USAGE: <flags>
639# @DESCRIPTION:
640# Add extra <flags> to the current LDFLAGS.
641append-ldflags() {
642 [[ $# -eq 0 ]] && return 0
643 local flag
644 for flag in "$@"; do
645 [[ ${flag} == -l* ]] && \
646 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
647 done
648
649 export LDFLAGS="${LDFLAGS} $*"
650 return 0
651}
652
653# @FUNCTION: filter-ldflags
654# @USAGE: <flags>
655# @DESCRIPTION:
656# Remove particular <flags> from LDFLAGS. Accepts shell globs.
657filter-ldflags() {
658 _filter-var LDFLAGS "$@"
659 return 0
660}
661
662# @FUNCTION: raw-ldflags
663# @USAGE: [flags]
664# @DESCRIPTION:
665# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
666# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
667# to gcc where it needs the '-Wl,'.
668#
669# If no flags are specified, then default to ${LDFLAGS}.
670raw-ldflags() {
671 local x input="$@"
672 [[ -z ${input} ]] && input=${LDFLAGS}
673 set --
674 for x in ${input} ; do
675 x=${x#-Wl,}
676 set -- "$@" ${x//,/ }
677 done
678 echo "$@"
679}
680
681# @FUNCTION: no-as-needed
682# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
683no-as-needed() {
684 case $($(tc-getLD) -v 2>&1 </dev/null) in
685 *GNU*) # GNU ld
686 echo "-Wl,--no-as-needed" ;;
687 esac
688}
689
690# Some tests for when we screw with things and want to make
691# sure we didn't break anything
692#TESTS() {
693# CFLAGS="-a -b -c=1"
694# CXXFLAGS="-x -y -z=2"
695# LDFLAGS="-l -m -n=3"
696#
697# die() { exit 1; }
698# (is-flag 1 2 3) && die
699# (is-ldflag 1 2 3) && die
700#
701# is-flagq -l && die
702# is-ldflagq -a && die
703# is-flagq -a || die
704# is-flagq -x || die
705# is-ldflagq -n=* || die
706# is-ldflagq -n && die
707#
708# strip-unsupported-flags
709# [[ ${CFLAGS} == "-c=1" ]] || die
710# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
711#
712# echo "All tests pass"
713#}
714#TESTS
715
716fi

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