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Revision 1.51 Revision 1.173
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2012 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# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.51 2004/05/26 18:53:44 lv Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.173 2012/05/31 00:29:06 vapier Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic 5# @ECLASS: flag-o-matic.eclass
8INHERITED="$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.
9 12
10# 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
11#### filter-flags <flags> #### 14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### replace-cpu-flags <new.cpu> <old.cpus> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28#
29#### strip-flags ####
30# Strip C[XX]FLAGS of everything except known
31# good options.
32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
37#### get-flag <flag> ####
38# Find and echo the value for a particular flag
39#
40#### replace-sparc64-flags ####
41# Sets mcpu to v8 and uses the original value
42# as mtune if none specified.
43#
44#### filter-mfpmath <math types> ####
45# Remove specified math types from the fpmath specification
46# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
47# will leave the user with -mfpmath=386
48#
49#### append-ldflags ####
50# Add extra flags to your current LDFLAGS
51#
52#### filter-ldflags <flags> ####
53# Remove particular flags from LDFLAGS
54# Matches only complete flags
55#
56#### etexec-flags ####
57# hooked function for hardened gcc that appends
58# -fno-pic to {C,CXX,LD}FLAGS
59# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
60#
61#### fstack-flags ####
62# hooked function for hardened gcc that appends
63# -fno-stack-protector to {C,CXX,LD}FLAGS
64# when a package is filtering -fstack-protector, -fstack-protector-all
65# notice: modern automatic specs files will also suppress -fstack-protector-all
66# when only -fno-stack-protector is given
67#
68 15
16inherit eutils toolchain-funcs multilib
17
18# Return all the flag variables that our high level funcs operate on.
19all-flag-vars() {
20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
21}
22
69# C[XX]FLAGS that we allow in strip-flags 23# {C,CXX,F,FC}FLAGS that we allow in strip-flags
24# Note: shell globs and character lists are allowed
70setup-allowed-flags() { 25setup-allowed-flags() {
71 if [ -z "${ALLOWED_FLAGS}" ] ; then 26 ALLOWED_FLAGS="-pipe"
72 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
33 ALLOWED_FLAGS+=" -W* -w"
34
35 # allow a bunch of flags that negate features / control ABI
36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
49
50 # 4.5
51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
52 # 4.6
53 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
54
55 export ALLOWED_FLAGS
56 return 0
57}
58
59# inverted filters for hardened compiler. This is trying to unpick
60# the hardened compiler defaults.
61_filter-hardened() {
62 local f
63 for f in "$@" ; do
73 case "${ARCH}" in 64 case "${f}" in
74 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 65 # Ideally we should only concern ourselves with PIE flags,
75 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 66 # not -fPIC or -fpic, but too many places filter -fPIC without
76 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 67 # thinking about -fPIE.
77 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 68 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
78 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 69 gcc-specs-pie || continue
70 is-flagq -nopie || append-flags -nopie;;
71 -fstack-protector)
72 gcc-specs-ssp || continue
73 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
74 -fstack-protector-all)
75 gcc-specs-ssp-to-all || continue
76 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
77 -fno-strict-overflow)
78 gcc-specs-nostrict || continue
79 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
79 esac 80 esac
80 fi 81 done
81
82 # C[XX]FLAGS that we are think is ok, but needs testing
83 # NOTE: currently -Os have issues with gcc3 and K6* arch's
84 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
85 return 0
86} 82}
87 83
84# Remove occurrences of strings from variable given in $1
85# Strings removed are matched as globs, so for example
86# '-O*' would remove -O1, -O2 etc.
87_filter-var() {
88 local f x var=$1 new=()
89 shift
90
91 for f in ${!var} ; do
92 for x in "$@" ; do
93 # Note this should work with globs like -O*
94 [[ ${f} == ${x} ]] && continue 2
95 done
96 new+=( "${f}" )
97 done
98 eval export ${var}=\""${new[*]}"\"
99}
100
101# @FUNCTION: filter-flags
102# @USAGE: <flags>
103# @DESCRIPTION:
104# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
88filter-flags() { 105filter-flags() {
89 for x in "$@" ; do 106 _filter-hardened "$@"
90 case "${x}" in 107 local v
91 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 108 for v in $(all-flag-vars) ; do
92 -fstack-protector|-fstack-protector-all) fstack-flags;; 109 _filter-var ${v} "$@"
93 *) ;;
94 esac
95 done 110 done
96
97 # we do this fancy spacing stuff so as to not filter
98 # out part of a flag ... we want flag atoms ! :D
99 CFLAGS=" ${CFLAGS} "
100 CXXFLAGS=" ${CXXFLAGS} "
101 for x in "$@" ; do
102 CFLAGS="${CFLAGS// ${x} / }"
103 CXXFLAGS="${CXXFLAGS// ${x} / }"
104 done
105 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
106 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
107 return 0 111 return 0
108} 112}
109 113
114# @FUNCTION: filter-lfs-flags
115# @DESCRIPTION:
116# Remove flags that enable Large File Support.
110filter-lfs-flags() { 117filter-lfs-flags() {
118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
111 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
112} 124}
113 125
126# @FUNCTION: filter-ldflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Remove particular <flags> from LDFLAGS. Accepts shell globs.
130filter-ldflags() {
131 _filter-var LDFLAGS "$@"
132 return 0
133}
134
135# @FUNCTION: append-cppflags
136# @USAGE: <flags>
137# @DESCRIPTION:
138# Add extra <flags> to the current CPPFLAGS.
139append-cppflags() {
140 [[ $# -eq 0 ]] && return 0
141 export CPPFLAGS="${CPPFLAGS} $*"
142 return 0
143}
144
145# @FUNCTION: append-cflags
146# @USAGE: <flags>
147# @DESCRIPTION:
148# Add extra <flags> to the current CFLAGS.
149append-cflags() {
150 [[ $# -eq 0 ]] && return 0
151 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
152 return 0
153}
154
155# @FUNCTION: append-cxxflags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to the current CXXFLAGS.
159append-cxxflags() {
160 [[ $# -eq 0 ]] && return 0
161 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
162 return 0
163}
164
165# @FUNCTION: append-fflags
166# @USAGE: <flags>
167# @DESCRIPTION:
168# Add extra <flags> to the current {F,FC}FLAGS.
169append-fflags() {
170 [[ $# -eq 0 ]] && return 0
171 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
172 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
173 return 0
174}
175
176# @FUNCTION: append-lfs-flags
177# @DESCRIPTION:
178# Add flags that enable Large File Support.
114append-lfs-flags() { 179append-lfs-flags() {
180 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
181 # see comments in filter-lfs-flags func for meaning of these
115 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 182 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
116} 183}
117 184
185# @FUNCTION: append-ldflags
186# @USAGE: <flags>
187# @DESCRIPTION:
188# Add extra <flags> to the current LDFLAGS.
189append-ldflags() {
190 [[ $# -eq 0 ]] && return 0
191 local flag
192 for flag in "$@"; do
193 [[ ${flag} == -l* ]] && \
194 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
195 done
196
197 export LDFLAGS="${LDFLAGS} $*"
198 return 0
199}
200
201# @FUNCTION: append-flags
202# @USAGE: <flags>
203# @DESCRIPTION:
204# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
118append-flags() { 205append-flags() {
119 export CFLAGS="${CFLAGS} $@" 206 [[ $# -eq 0 ]] && return 0
120 export CXXFLAGS="${CXXFLAGS} $@" 207 case " $* " in
121 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags 208 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
209 *' '-L*|\
210 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
211 esac
212 append-cflags "$@"
213 append-cxxflags "$@"
214 append-fflags "$@"
122 return 0 215 return 0
123} 216}
124 217
218# @FUNCTION: replace-flags
219# @USAGE: <old> <new>
220# @DESCRIPTION:
221# Replace the <old> flag with <new>. Accepts shell globs for <old>.
125replace-flags() { 222replace-flags() {
126 # we do this fancy spacing stuff so as to not filter 223 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
127 # out part of a flag ... we want flag atoms ! :D
128 CFLAGS=" ${CFLAGS} "
129 CXXFLAGS=" ${CXXFLAGS} "
130 CFLAGS="${CFLAGS// ${1} / ${2} }"
131 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
132 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
133 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
134 return 0
135}
136 224
225 local f var new
226 for var in $(all-flag-vars) ; do
227 # Looping over the flags instead of using a global
228 # substitution ensures that we're working with flag atoms.
229 # Otherwise globs like -O* have the potential to wipe out the
230 # list of flags.
231 new=()
232 for f in ${!var} ; do
233 # Note this should work with globs like -O*
234 [[ ${f} == ${1} ]] && f=${2}
235 new+=( "${f}" )
236 done
237 eval export ${var}=\""${new[*]}"\"
238 done
239
240 return 0
241}
242
243# @FUNCTION: replace-cpu-flags
244# @USAGE: <old> <new>
245# @DESCRIPTION:
246# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
247# with flags that select the <new> cpu. Accepts shell globs for <old>.
137replace-cpu-flags() { 248replace-cpu-flags() {
138 local newcpu="$1" ; shift 249 local newcpu="$#" ; newcpu="${!newcpu}"
139 local oldcpu="" 250 while [ $# -gt 1 ] ; do
140 for oldcpu in "$@" ; do 251 # quote to make sure that no globbing is done (particularly on
252 # ${oldcpu}) prior to calling replace-flags
141 replace-flags -march=${oldcpu} -march=${newcpu} 253 replace-flags "-march=${1}" "-march=${newcpu}"
142 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 254 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
143 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 255 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
256 shift
144 done 257 done
258 return 0
259}
260
261_is_flagq() {
262 local x
263 for x in ${!1} ; do
264 [[ ${x} == $2 ]] && return 0
265 done
145 return 0 266 return 1
146} 267}
147 268
269# @FUNCTION: is-flagq
270# @USAGE: <flag>
271# @DESCRIPTION:
272# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
273is-flagq() {
274 [[ -n $2 ]] && die "Usage: is-flag <flag>"
275
276 local var
277 for var in $(all-flag-vars) ; do
278 _is_flagq ${var} "$1" && return 0
279 done
280 return 1
281}
282
283# @FUNCTION: is-flag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
148is-flag() { 287is-flag() {
149 for x in ${CFLAGS} ${CXXFLAGS} ; do 288 is-flagq "$@" && echo true
150 if [ "${x}" == "$1" ] ; then
151 echo true
152 return 0
153 fi
154 done
155 return 1
156} 289}
157 290
291# @FUNCTION: is-ldflagq
292# @USAGE: <flag>
293# @DESCRIPTION:
294# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
295is-ldflagq() {
296 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
297 _is_flagq LDFLAGS $1
298}
299
300# @FUNCTION: is-ldflag
301# @USAGE: <flag>
302# @DESCRIPTION:
303# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
304is-ldflag() {
305 is-ldflagq "$@" && echo true
306}
307
308# @FUNCTION: filter-mfpmath
309# @USAGE: <math types>
310# @DESCRIPTION:
311# Remove specified math types from the fpmath flag. For example, if the user
312# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
313# -mfpmath=386.
158filter-mfpmath() { 314filter-mfpmath() {
315 local orig_mfpmath new_math prune_math
316
159 # save the original -mfpmath flag 317 # save the original -mfpmath flag
160 local orig_mfpmath="`get-flag -mfpmath`" 318 orig_mfpmath=$(get-flag -mfpmath)
161 # get the value of the current -mfpmath flag 319 # get the value of the current -mfpmath flag
162 local new_math=" `get-flag mfpmath | tr , ' '` " 320 new_math=$(get-flag mfpmath)
321 new_math=" ${new_math//,/ } "
163 # figure out which math values are to be removed 322 # figure out which math values are to be removed
164 local prune_math="" 323 prune_math=""
165 for prune_math in "$@" ; do 324 for prune_math in "$@" ; do
166 new_math="${new_math/ ${prune_math} / }" 325 new_math=${new_math/ ${prune_math} / }
167 done 326 done
168 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 327 new_math=$(echo ${new_math})
328 new_math=${new_math// /,}
169 329
170 if [ -z "${new_math}" ] ; then 330 if [[ -z ${new_math} ]] ; then
171 # if we're removing all user specified math values are 331 # if we're removing all user specified math values are
172 # slated for removal, then we just filter the flag 332 # slated for removal, then we just filter the flag
173 filter-flags ${orig_mfpmath} 333 filter-flags ${orig_mfpmath}
174 else 334 else
175 # if we only want to filter some of the user specified 335 # if we only want to filter some of the user specified
177 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 337 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
178 fi 338 fi
179 return 0 339 return 0
180} 340}
181 341
342# @FUNCTION: strip-flags
343# @DESCRIPTION:
344# Strip C[XX]FLAGS of everything except known good/safe flags.
182strip-flags() { 345strip-flags() {
346 local x y var
347
183 setup-allowed-flags 348 setup-allowed-flags
184 349
185 local NEW_CFLAGS="" 350 set -f # disable pathname expansion
186 local NEW_CXXFLAGS=""
187 351
188 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 352 for var in $(all-flag-vars) ; do
189 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 353 local new=()
190 use debug && einfo "Enabling the use of some unstable flags" 354
191 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 355 for x in ${!var} ; do
356 local flag=${x%%=*}
357 for y in ${ALLOWED_FLAGS} ; do
358 if [[ -z ${flag%%${y}} ]] ; then
359 new+=( "${x}" )
360 break
361 fi
362 done
363 done
364
365 # In case we filtered out all optimization flags fallback to -O2
366 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
367 new+=( -O2 )
368 fi
369
370 eval export ${var}=\""${new[*]}"\"
371 done
372
373 set +f # re-enable pathname expansion
374
375 return 0
376}
377
378test-flag-PROG() {
379 local comp=$1
380 local flag=$2
381
382 [[ -z ${comp} || -z ${flag} ]] && return 1
383
384 # use -c so we can test the assembler as well
385 local PROG=$(tc-get${comp})
386 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
387 > /dev/null 2>&1
388}
389
390# @FUNCTION: test-flag-CC
391# @USAGE: <flag>
392# @DESCRIPTION:
393# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
394test-flag-CC() { test-flag-PROG "CC" "$1"; }
395
396# @FUNCTION: test-flag-CXX
397# @USAGE: <flag>
398# @DESCRIPTION:
399# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
400test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
401
402# @FUNCTION: test-flag-F77
403# @USAGE: <flag>
404# @DESCRIPTION:
405# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
406test-flag-F77() { test-flag-PROG "F77" "$1"; }
407
408# @FUNCTION: test-flag-FC
409# @USAGE: <flag>
410# @DESCRIPTION:
411# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
412test-flag-FC() { test-flag-PROG "FC" "$1"; }
413
414test-flags-PROG() {
415 local comp=$1
416 local flags
417 local x
418
419 shift
420
421 [[ -z ${comp} ]] && return 1
422
423 for x in "$@" ; do
424 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
425 done
426
427 echo "${flags}"
428
429 # Just bail if we dont have any flags
430 [[ -n ${flags} ]]
431}
432
433# @FUNCTION: test-flags-CC
434# @USAGE: <flags>
435# @DESCRIPTION:
436# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
437test-flags-CC() { test-flags-PROG "CC" "$@"; }
438
439# @FUNCTION: test-flags-CXX
440# @USAGE: <flags>
441# @DESCRIPTION:
442# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
443test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
444
445# @FUNCTION: test-flags-F77
446# @USAGE: <flags>
447# @DESCRIPTION:
448# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
449test-flags-F77() { test-flags-PROG "F77" "$@"; }
450
451# @FUNCTION: test-flags-FC
452# @USAGE: <flags>
453# @DESCRIPTION:
454# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
455test-flags-FC() { test-flags-PROG "FC" "$@"; }
456
457# @FUNCTION: test-flags
458# @USAGE: <flags>
459# @DESCRIPTION:
460# Short-hand that should hopefully work for both C and C++ compiler, but
461# its really only present due to the append-flags() abomination.
462test-flags() { test-flags-CC "$@"; }
463
464# @FUNCTION: test_version_info
465# @USAGE: <version>
466# @DESCRIPTION:
467# Returns shell true if the current C compiler version matches <version>, else returns shell false.
468# Accepts shell globs.
469test_version_info() {
470 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
471 return 0
472 else
473 return 1
192 fi 474 fi
193
194 set -f
195
196 for x in ${CFLAGS}
197 do
198 for y in ${ALLOWED_FLAGS}
199 do
200 flag=${x%%=*}
201 if [ "${flag%%${y}}" = "" ]
202 then
203 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
204 break
205 fi
206 done
207 done
208
209 for x in ${CXXFLAGS}
210 do
211 for y in ${ALLOWED_FLAGS}
212 do
213 flag=${x%%=*}
214 if [ "${flag%%${y}}" = "" ]
215 then
216 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
217 break
218 fi
219 done
220 done
221
222 # In case we filtered out all optimization flags fallback to -O2
223 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
224 NEW_CFLAGS="${NEW_CFLAGS} -O2"
225 fi
226 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
227 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
228 fi
229
230 set +f
231
232 use debug \
233 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
234 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
235
236 export CFLAGS="${NEW_CFLAGS}"
237 export CXXFLAGS="${NEW_CXXFLAGS}"
238 return 0
239} 475}
240 476
241test_flag() { 477# @FUNCTION: strip-unsupported-flags
242 if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then 478# @DESCRIPTION:
243 echo "$@" 479# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
244 return 0
245 fi
246 return 1
247}
248
249strip-unsupported-flags() { 480strip-unsupported-flags() {
250 for x in ${CFLAGS} ; do 481 export CFLAGS=$(test-flags-CC ${CFLAGS})
251 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 482 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
252 done 483 export FFLAGS=$(test-flags-F77 ${FFLAGS})
253 for x in ${CXXFLAGS} ; do 484 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
254 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
255 done
256
257 export CFLAGS="${NEW_CFLAGS}"
258 export CXXFLAGS="${NEW_CXXFLAGS}"
259} 485}
260 486
487# @FUNCTION: get-flag
488# @USAGE: <flag>
489# @DESCRIPTION:
490# Find and echo the value for a particular flag. Accepts shell globs.
261get-flag() { 491get-flag() {
492 local f var findflag="$1"
493
262 # this code looks a little flaky but seems to work for 494 # this code looks a little flaky but seems to work for
263 # everything we want ... 495 # everything we want ...
264 # for example, if CFLAGS="-march=i686": 496 # for example, if CFLAGS="-march=i686":
265 # `get-flags -march` == "-march=i686" 497 # `get-flag -march` == "-march=i686"
266 # `get-flags march` == "i686" 498 # `get-flag march` == "i686"
267 local findflag="$1" 499 for var in $(all-flag-vars) ; do
268 for f in ${CFLAGS} ${CXXFLAGS} ; do 500 for f in ${!var} ; do
269 if [ "${f/${findflag}}" != "${f}" ] ; then 501 if [ "${f/${findflag}}" != "${f}" ] ; then
270 echo "${f/-${findflag}=}" 502 printf "%s\n" "${f/-${findflag}=}"
271 return 0 503 return 0
272 fi 504 fi
505 done
273 done 506 done
274 return 1 507 return 1
275} 508}
276 509
277has_pic() { 510# @FUNCTION: has_m64
278 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 511# @DESCRIPTION:
279 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 512# This doesn't test if the flag is accepted, it tests if the flag actually
280 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0 513# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
514# return code is 0, else the return code is 1.
515has_m64() {
516 eqawarn "${FUNCNAME}: don't use this anymore"
517
518 # this doesnt test if the flag is accepted, it tests if the flag
519 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
520 # please dont replace this function with test_flag in some future
521 # clean-up!
522
523 local temp="$(emktemp)"
524 echo "int main() { return(0); }" > "${temp}".c
525 MY_CC=$(tc-getCC)
526 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
527 local ret=$?
528 rm -f "${temp}".c
529 [[ ${ret} != 1 ]] && return 0
281 return 1 530 return 1
282} 531}
283 532
284has_pie() { 533has_m32() {
285 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 534 die "${FUNCNAME}: don't use this anymore"
286 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
287 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
288 return 1
289} 535}
290
291has_ssp() {
292 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
293 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
294 return 1
295}
296 536
537# @FUNCTION: replace-sparc64-flags
538# @DESCRIPTION:
539# Sets mcpu to v8 and uses the original value as mtune if none specified.
297replace-sparc64-flags() { 540replace-sparc64-flags() {
298 local SPARC64_CPUS="ultrasparc v9" 541 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
299 542
300 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 543 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
301 then
302 for x in ${SPARC64_CPUS} 544 for x in ${SPARC64_CPUS}; do
303 do
304 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 545 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
305 done 546 done
306 else 547 else
307 for x in ${SPARC64_CPUS} 548 for x in ${SPARC64_CPUS}; do
308 do
309 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 549 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
310 done 550 done
311 fi 551 fi
312 552
313 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ] 553 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
314 then
315 for x in ${SPARC64_CPUS} 554 for x in ${SPARC64_CPUS}; do
316 do
317 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 555 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
318 done 556 done
319 else 557 else
320 for x in ${SPARC64_CPUS} 558 for x in ${SPARC64_CPUS}; do
321 do
322 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 559 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
323 done 560 done
324 fi 561 fi
325}
326 562
563 export CFLAGS CXXFLAGS
564}
565
566# @FUNCTION: append-libs
567# @USAGE: <libs>
568# @DESCRIPTION:
569# Add extra <libs> to the current LIBS.
327append-ldflags() { 570append-libs() {
328 LDFLAGS="${LDFLAGS} $@" 571 [[ $# -eq 0 ]] && return 0
329 return 0 572 local flag
330}
331
332filter-ldflags() {
333 # we do this fancy spacing stuff so as to not filter
334 # out part of a flag ... we want flag atoms ! :D
335 LDFLAGS=" ${LDFLAGS} "
336 for x in "$@" ; do 573 for flag in "$@"; do
337 LDFLAGS="${LDFLAGS// ${x} / }" 574 [[ ${flag} == -l* ]] && flag=${flag#-l}
575 export LIBS="${LIBS} -l${flag}"
338 done 576 done
339 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
340 return 0
341}
342 577
343etexec-flags() { 578 return 0
344 has_pie || has_pic 579}
345 if [ $? == 0 ] ; then
346 [ -z "`is-flag -fno-pic`" ] &&
347 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
348 580
349 [ -z "`is-flag -nopie`" ] && 581# @FUNCTION: raw-ldflags
350 export CFLAGS="${CFLAGS} `test_flag -nopie`" 582# @USAGE: [flags]
583# @DESCRIPTION:
584# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
585# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
586# to gcc where it needs the '-Wl,'.
587#
588# If no flags are specified, then default to ${LDFLAGS}.
589raw-ldflags() {
590 local x input="$@"
591 [[ -z ${input} ]] && input=${LDFLAGS}
592 set --
593 for x in ${input} ; do
594 x=${x#-Wl,}
595 set -- "$@" ${x//,/ }
596 done
597 echo "$@"
598}
599
600# @FUNCTION: no-as-needed
601# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
602no-as-needed() {
603 case $($(tc-getLD) -v 2>&1 </dev/null) in
604 *GNU*) # GNU ld
605 echo "-Wl,--no-as-needed" ;;
606 esac
607}
608
351 fi 609fi
352}
353
354fstack-flags() {
355 has_ssp
356 if [ $? == 0 ] ; then
357 [ -z "`is-flag -fno-stack-protector`" ] &&
358 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
359 fi
360}

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