/[gentoo-x86]/eclass/flag-o-matic.eclass
Gentoo

Diff of /eclass/flag-o-matic.eclass

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 1.41 Revision 1.204
1# Copyright 1999-2003 Gentoo Technologies, Inc. 1# Copyright 1999-2014 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 1.41 2004/03/16 21:37:09 solar Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.204 2014/12/31 08:26:48 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 [[ -z ${_FLAG_O_MATIC_ECLASS} ]]; then
11#### filter-flags <flags> #### 14_FLAG_O_MATIC_ECLASS=1
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# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
59# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
60#
61#### fstack-flags ####
62# hooked function for hardened-gcc that appends
63# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
64# and a package is filtering -fstack-protector, -fstack-protector-all
65#
66 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
67# C[XX]FLAGS that we allow in strip-flags 23# {C,CPP,CXX,CCAS,F,FC,LD}FLAGS that we allow in strip-flags
24# Note: shell globs and character lists are allowed
68setup-allowed-flags() { 25setup-allowed-flags() {
69 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 26 ALLOWED_FLAGS="-pipe"
27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -Og -mcpu -march -mtune"
28 ALLOWED_FLAGS+=" -fstack-protector* -fsanitize=*"
29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -nopie -fno-unit-at-a-time"
31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gdwarf-* gstabs -gstabs+"
32 ALLOWED_FLAGS+=" -fno-ident -fpermissive -frecord-gcc-switches"
33 ALLOWED_FLAGS+=" -fdiagnostics*"
34 ALLOWED_FLAGS+=" -W* -w"
35
36 # allow a bunch of flags that negate features / control ABI
37 ALLOWED_FLAGS+=" -fno-stack-protector* -fabi-version=* \
38 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
39 -fno-omit-frame-pointer -fno-builtin*"
40 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
41 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
42 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
43 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
44 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
45 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
46 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
47 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
48 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
49 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi \
50 -mfix-r10000 -mno-fix-r10000 -D* -U*"
51
52 # 4.5
53 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
54 # 4.6
55 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
56 # 4.7
57 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
58 # 4.8
59 ALLOWED_FLAGS+=" -mno-fxsr -mno-rtm -mno-xsave -mno-xsaveopt"
60 # 4.9
61 ALLOWED_FLAGS+=" -mno-avx512cd -mno-avx512er -mno-avx512f -mno-avx512pf -mno-sha"
62
63 # CPPFLAGS and LDFLAGS
64 ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
65
66 export ALLOWED_FLAGS
67 return 0
68}
69
70# 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
70 case "${ARCH}" in 75 case "${f}" in
71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 76 # Ideally we should only concern ourselves with PIE flags,
72 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 77 # not -fPIC or -fpic, but too many places filter -fPIC without
73 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 78 # thinking about -fPIE.
74 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 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 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
85 -fstack-protector-all)
86 gcc-specs-ssp-to-all || continue
87 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 -fno-strict-overflow)
89 gcc-specs-nostrict || continue
90 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
91 esac
92 done
93}
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=$1 new=()
100 shift
101
102 for f in ${!var} ; do
103 for x in "$@" ; do
104 # Note this should work with globs like -O*
105 [[ ${f} == ${x} ]] && continue 2
106 done
107 new+=( "${f}" )
108 done
109 eval export ${var}=\""${new[*]}"\"
110}
111
112# @FUNCTION: filter-flags
113# @USAGE: <flags>
114# @DESCRIPTION:
115# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
116filter-flags() {
117 _filter-hardened "$@"
118 local v
119 for v in $(all-flag-vars) ; do
120 _filter-var ${v} "$@"
121 done
122 return 0
123}
124
125# @FUNCTION: filter-lfs-flags
126# @DESCRIPTION:
127# Remove flags that enable Large File Support.
128filter-lfs-flags() {
129 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
130 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
131 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
132 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
133 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135}
136
137# @FUNCTION: filter-ldflags
138# @USAGE: <flags>
139# @DESCRIPTION:
140# Remove particular <flags> from LDFLAGS. Accepts shell globs.
141filter-ldflags() {
142 _filter-var LDFLAGS "$@"
143 return 0
144}
145
146# @FUNCTION: append-cppflags
147# @USAGE: <flags>
148# @DESCRIPTION:
149# Add extra <flags> to the current CPPFLAGS.
150append-cppflags() {
151 [[ $# -eq 0 ]] && return 0
152 export CPPFLAGS+=" $*"
153 return 0
154}
155
156# @FUNCTION: append-cflags
157# @USAGE: <flags>
158# @DESCRIPTION:
159# Add extra <flags> to the current CFLAGS. If a flag might not be supported
160# with different compilers (or versions), then use test-flags-CC like so:
161# @CODE
162# append-cflags $(test-flags-CC -funky-flag)
163# @CODE
164append-cflags() {
165 [[ $# -eq 0 ]] && return 0
166 # Do not do automatic flag testing ourselves. #417047
167 export CFLAGS+=" $*"
168 return 0
169}
170
171# @FUNCTION: append-cxxflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current CXXFLAGS. If a flag might not be supported
175# with different compilers (or versions), then use test-flags-CXX like so:
176# @CODE
177# append-cxxflags $(test-flags-CXX -funky-flag)
178# @CODE
179append-cxxflags() {
180 [[ $# -eq 0 ]] && return 0
181 # Do not do automatic flag testing ourselves. #417047
182 export CXXFLAGS+=" $*"
183 return 0
184}
185
186# @FUNCTION: append-fflags
187# @USAGE: <flags>
188# @DESCRIPTION:
189# Add extra <flags> to the current {F,FC}FLAGS. If a flag might not be supported
190# with different compilers (or versions), then use test-flags-F77 like so:
191# @CODE
192# append-fflags $(test-flags-F77 -funky-flag)
193# @CODE
194append-fflags() {
195 [[ $# -eq 0 ]] && return 0
196 # Do not do automatic flag testing ourselves. #417047
197 export FFLAGS+=" $*"
198 export FCFLAGS+=" $*"
199 return 0
200}
201
202# @FUNCTION: append-lfs-flags
203# @DESCRIPTION:
204# Add flags that enable Large File Support.
205append-lfs-flags() {
206 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
207 # see comments in filter-lfs-flags func for meaning of these
208 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
209}
210
211# @FUNCTION: append-ldflags
212# @USAGE: <flags>
213# @DESCRIPTION:
214# Add extra <flags> to the current LDFLAGS.
215append-ldflags() {
216 [[ $# -eq 0 ]] && return 0
217 local flag
218 for flag in "$@"; do
219 [[ ${flag} == -l* ]] && \
220 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
221 done
222
223 export LDFLAGS="${LDFLAGS} $*"
224 return 0
225}
226
227# @FUNCTION: append-flags
228# @USAGE: <flags>
229# @DESCRIPTION:
230# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
231append-flags() {
232 [[ $# -eq 0 ]] && return 0
233 case " $* " in
234 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
235 *' '-L*|\
236 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
75 esac 237 esac
76 238 append-cflags "$@"
77 # C[XX]FLAGS that we are think is ok, but needs testing 239 append-cxxflags "$@"
78 # NOTE: currently -Os have issues with gcc3 and K6* arch's 240 append-fflags "$@"
79 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
80 return 0 241 return 0
81} 242}
82 243
83filter-flags() { 244# @FUNCTION: replace-flags
84 for x in "$@" ; do 245# @USAGE: <old> <new>
85 case "${x}" in 246# @DESCRIPTION:
86 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 247# Replace the <old> flag with <new>. Accepts shell globs for <old>.
87 -fstack-protector|-fstack-protector-all) fstack-flags;;
88 *) ;;
89 esac
90 done
91
92 # we do this fancy spacing stuff so as to not filter
93 # out part of a flag ... we want flag atoms ! :D
94 CFLAGS=" ${CFLAGS} "
95 CXXFLAGS=" ${CXXFLAGS} "
96 for x in "$@" ; do
97 CFLAGS="${CFLAGS// ${x} / }"
98 CXXFLAGS="${CXXFLAGS// ${x} / }"
99 done
100 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
101 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
102 return 0
103}
104
105filter-lfs-flags() {
106 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
107}
108
109append-flags() {
110 export CFLAGS="${CFLAGS} $@"
111 export CXXFLAGS="${CXXFLAGS} $@"
112 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
113 return 0
114}
115
116replace-flags() { 248replace-flags() {
117 # we do this fancy spacing stuff so as to not filter 249 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
118 # out part of a flag ... we want flag atoms ! :D
119 CFLAGS=" ${CFLAGS} "
120 CXXFLAGS=" ${CXXFLAGS} "
121 CFLAGS="${CFLAGS// ${1} / ${2} }"
122 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
123 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
124 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
125 return 0
126}
127 250
251 local f var new
252 for var in $(all-flag-vars) ; do
253 # Looping over the flags instead of using a global
254 # substitution ensures that we're working with flag atoms.
255 # Otherwise globs like -O* have the potential to wipe out the
256 # list of flags.
257 new=()
258 for f in ${!var} ; do
259 # Note this should work with globs like -O*
260 [[ ${f} == ${1} ]] && f=${2}
261 new+=( "${f}" )
262 done
263 eval export ${var}=\""${new[*]}"\"
264 done
265
266 return 0
267}
268
269# @FUNCTION: replace-cpu-flags
270# @USAGE: <old> <new>
271# @DESCRIPTION:
272# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
273# with flags that select the <new> cpu. Accepts shell globs for <old>.
128replace-cpu-flags() { 274replace-cpu-flags() {
129 local newcpu="$1" ; shift 275 local newcpu="$#" ; newcpu="${!newcpu}"
130 local oldcpu="" 276 while [ $# -gt 1 ] ; do
131 for oldcpu in "$@" ; do 277 # quote to make sure that no globbing is done (particularly on
278 # ${oldcpu}) prior to calling replace-flags
132 replace-flags -march=${oldcpu} -march=${newcpu} 279 replace-flags "-march=${1}" "-march=${newcpu}"
133 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 280 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
134 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 281 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
282 shift
135 done 283 done
284 return 0
285}
286
287_is_flagq() {
288 local x var
289 eval var=\""\${$1[*]}"\"
290 for x in ${var} ; do
291 [[ ${x} == $2 ]] && return 0
292 done
136 return 0 293 return 1
137} 294}
138 295
296# @FUNCTION: is-flagq
297# @USAGE: <flag>
298# @DESCRIPTION:
299# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
300is-flagq() {
301 [[ -n $2 ]] && die "Usage: is-flag <flag>"
302
303 local var
304 for var in $(all-flag-vars) ; do
305 _is_flagq ${var} "$1" && return 0
306 done
307 return 1
308}
309
310# @FUNCTION: is-flag
311# @USAGE: <flag>
312# @DESCRIPTION:
313# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
139is-flag() { 314is-flag() {
140 for x in ${CFLAGS} ${CXXFLAGS} ; do 315 is-flagq "$@" && echo true
141 if [ "${x}" == "$1" ] ; then
142 echo true
143 return 0
144 fi
145 done
146 return 1
147} 316}
148 317
318# @FUNCTION: is-ldflagq
319# @USAGE: <flag>
320# @DESCRIPTION:
321# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
322is-ldflagq() {
323 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
324 _is_flagq LDFLAGS $1
325}
326
327# @FUNCTION: is-ldflag
328# @USAGE: <flag>
329# @DESCRIPTION:
330# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
331is-ldflag() {
332 is-ldflagq "$@" && echo true
333}
334
335# @FUNCTION: filter-mfpmath
336# @USAGE: <math types>
337# @DESCRIPTION:
338# Remove specified math types from the fpmath flag. For example, if the user
339# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
340# -mfpmath=386.
149filter-mfpmath() { 341filter-mfpmath() {
342 local orig_mfpmath new_math prune_math
343
150 # save the original -mfpmath flag 344 # save the original -mfpmath flag
151 local orig_mfpmath="`get-flag -mfpmath`" 345 orig_mfpmath=$(get-flag -mfpmath)
152 # get the value of the current -mfpmath flag 346 # get the value of the current -mfpmath flag
153 local new_math=" `get-flag mfpmath | tr , ' '` " 347 new_math=$(get-flag mfpmath)
348 # convert "both" to something we can filter
349 new_math=${new_math/both/387,sse}
350 new_math=" ${new_math//[,+]/ } "
154 # figure out which math values are to be removed 351 # figure out which math values are to be removed
155 local prune_math="" 352 prune_math=""
156 for prune_math in "$@" ; do 353 for prune_math in "$@" ; do
157 new_math="${new_math/ ${prune_math} / }" 354 new_math=${new_math/ ${prune_math} / }
158 done 355 done
159 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 356 new_math=$(echo ${new_math})
357 new_math=${new_math// /,}
160 358
161 if [ -z "${new_math}" ] ; then 359 if [[ -z ${new_math} ]] ; then
162 # if we're removing all user specified math values are 360 # if we're removing all user specified math values are
163 # slated for removal, then we just filter the flag 361 # slated for removal, then we just filter the flag
164 filter-flags ${orig_mfpmath} 362 filter-flags ${orig_mfpmath}
165 else 363 else
166 # if we only want to filter some of the user specified 364 # if we only want to filter some of the user specified
168 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 366 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
169 fi 367 fi
170 return 0 368 return 0
171} 369}
172 370
371# @FUNCTION: strip-flags
372# @DESCRIPTION:
373# Strip *FLAGS of everything except known good/safe flags. This runs over all
374# flags returned by all_flag_vars().
173strip-flags() { 375strip-flags() {
376 local x y var
377
174 setup-allowed-flags 378 setup-allowed-flags
175 379
176 local NEW_CFLAGS="" 380 set -f # disable pathname expansion
177 local NEW_CXXFLAGS=""
178 381
179 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 382 for var in $(all-flag-vars) ; do
180 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 383 local new=()
181 [ `use debug` ] && einfo "Enabling the use of some unstable flags" 384
182 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 385 for x in ${!var} ; do
386 local flag=${x%%=*}
387 for y in ${ALLOWED_FLAGS} ; do
388 if [[ -z ${flag%%${y}} ]] ; then
389 new+=( "${x}" )
390 break
391 fi
392 done
393 done
394
395 # In case we filtered out all optimization flags fallback to -O2
396 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
397 new+=( -O2 )
398 fi
399
400 if [[ ${!var} != "${new[*]}" ]] ; then
401 einfo "strip-flags: ${var}: changed '${!var}' to '${new[*]}'"
402 fi
403 eval export ${var}=\""${new[*]}"\"
404 done
405
406 set +f # re-enable pathname expansion
407
408 return 0
409}
410
411test-flag-PROG() {
412 local comp=$1
413 local lang=$2
414 local flag=$3
415
416 [[ -z ${comp} || -z ${flag} ]] && return 1
417
418 # use -c so we can test the assembler as well
419 local PROG=$(tc-get${comp})
420 if ${PROG} -c -o /dev/null -x${lang} - < /dev/null > /dev/null 2>&1 ; then
421 ${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \
422 > /dev/null 2>&1
423 else
424 ${PROG} "${flag}" -c -o /dev/null /dev/null > /dev/null 2>&1
183 fi 425 fi
426}
184 427
185 set -f 428# @FUNCTION: test-flag-CC
429# @USAGE: <flag>
430# @DESCRIPTION:
431# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
432test-flag-CC() { test-flag-PROG "CC" c "$1"; }
186 433
187 for x in ${CFLAGS} 434# @FUNCTION: test-flag-CXX
188 do 435# @USAGE: <flag>
189 for y in ${ALLOWED_FLAGS} 436# @DESCRIPTION:
190 do 437# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
191 flag=${x%%=*} 438test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
192 if [ "${flag%%${y}}" = "" ] 439
193 then 440# @FUNCTION: test-flag-F77
194 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 441# @USAGE: <flag>
195 break 442# @DESCRIPTION:
196 fi 443# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
444test-flag-F77() { test-flag-PROG "F77" f77 "$1"; }
445
446# @FUNCTION: test-flag-FC
447# @USAGE: <flag>
448# @DESCRIPTION:
449# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
450test-flag-FC() { test-flag-PROG "FC" f95 "$1"; }
451
452test-flags-PROG() {
453 local comp=$1
454 local flags=()
455 local x
456
457 shift
458
459 [[ -z ${comp} ]] && return 1
460
461 for x ; do
462 test-flag-${comp} "${x}" && flags+=( "${x}" )
197 done 463 done
198 done
199 464
200 for x in ${CXXFLAGS} 465 echo "${flags[*]}"
201 do
202 for y in ${ALLOWED_FLAGS}
203 do
204 flag=${x%%=*}
205 if [ "${flag%%${y}}" = "" ]
206 then
207 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
208 break
209 fi
210 done
211 done
212 466
213 # In case we filtered out all optimization flags fallback to -O2 467 # Just bail if we dont have any flags
214 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 468 [[ ${#flags[@]} -gt 0 ]]
215 NEW_CFLAGS="${NEW_CFLAGS} -O2" 469}
470
471# @FUNCTION: test-flags-CC
472# @USAGE: <flags>
473# @DESCRIPTION:
474# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
475test-flags-CC() { test-flags-PROG "CC" "$@"; }
476
477# @FUNCTION: test-flags-CXX
478# @USAGE: <flags>
479# @DESCRIPTION:
480# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
481test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
482
483# @FUNCTION: test-flags-F77
484# @USAGE: <flags>
485# @DESCRIPTION:
486# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
487test-flags-F77() { test-flags-PROG "F77" "$@"; }
488
489# @FUNCTION: test-flags-FC
490# @USAGE: <flags>
491# @DESCRIPTION:
492# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
493test-flags-FC() { test-flags-PROG "FC" "$@"; }
494
495# @FUNCTION: test-flags
496# @USAGE: <flags>
497# @DESCRIPTION:
498# Short-hand that should hopefully work for both C and C++ compiler, but
499# its really only present due to the append-flags() abomination.
500test-flags() { test-flags-CC "$@"; }
501
502# @FUNCTION: test_version_info
503# @USAGE: <version>
504# @DESCRIPTION:
505# Returns shell true if the current C compiler version matches <version>, else returns shell false.
506# Accepts shell globs.
507test_version_info() {
508 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
509 return 0
510 else
511 return 1
216 fi 512 fi
217 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
218 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
219 fi
220
221 set +f
222
223 [ `use debug` ] \
224 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
225 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
226
227 export CFLAGS="${NEW_CFLAGS}"
228 export CXXFLAGS="${NEW_CXXFLAGS}"
229 return 0
230} 513}
231 514
232test_flag() { 515# @FUNCTION: strip-unsupported-flags
233 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then 516# @DESCRIPTION:
234 echo "$@" 517# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
235 return 0
236 fi
237 return 1
238}
239
240strip-unsupported-flags() { 518strip-unsupported-flags() {
241 for x in ${CFLAGS} ; do 519 export CFLAGS=$(test-flags-CC ${CFLAGS})
242 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`" 520 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
243 done 521 export FFLAGS=$(test-flags-F77 ${FFLAGS})
244 for x in ${CXXFLAGS} ; do 522 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
245 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
246 done
247
248 export CFLAGS="${NEW_CFLAGS}"
249 export CXXFLAGS="${NEW_CXXFLAGS}"
250} 523}
251 524
525# @FUNCTION: get-flag
526# @USAGE: <flag>
527# @DESCRIPTION:
528# Find and echo the value for a particular flag. Accepts shell globs.
252get-flag() { 529get-flag() {
530 local f var findflag="$1"
531
253 # this code looks a little flaky but seems to work for 532 # this code looks a little flaky but seems to work for
254 # everything we want ... 533 # everything we want ...
255 # for example, if CFLAGS="-march=i686": 534 # for example, if CFLAGS="-march=i686":
256 # `get-flags -march` == "-march=i686" 535 # `get-flag -march` == "-march=i686"
257 # `get-flags march` == "i686" 536 # `get-flag march` == "i686"
258 local findflag="$1" 537 for var in $(all-flag-vars) ; do
259 for f in ${CFLAGS} ${CXXFLAGS} ; do 538 for f in ${!var} ; do
260 if [ "${f/${findflag}}" != "${f}" ] ; then 539 if [ "${f/${findflag}}" != "${f}" ] ; then
261 echo "${f/-${findflag}=}" 540 printf "%s\n" "${f/-${findflag}=}"
262 return 0 541 return 0
542 fi
543 done
544 done
545 return 1
546}
547
548# @FUNCTION: has_m64
549# @DESCRIPTION:
550# This doesn't test if the flag is accepted, it tests if the flag actually
551# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
552# return code is 0, else the return code is 1.
553has_m64() {
554 eqawarn "${FUNCNAME}: don't use this anymore"
555
556 # this doesnt test if the flag is accepted, it tests if the flag
557 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
558 # please dont replace this function with test_flag in some future
559 # clean-up!
560
561 local temp="$(emktemp)"
562 echo "int main() { return(0); }" > "${temp}".c
563 MY_CC=$(tc-getCC)
564 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
565 local ret=$?
566 rm -f "${temp}".c
567 [[ ${ret} != 1 ]] && return 0
568 return 1
569}
570
571has_m32() {
572 die "${FUNCNAME}: don't use this anymore"
573}
574
575# @FUNCTION: replace-sparc64-flags
576# @DESCRIPTION:
577# Sets mcpu to v8 and uses the original value as mtune if none specified.
578replace-sparc64-flags() {
579 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
580
581 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
582 for x in ${SPARC64_CPUS}; do
583 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
584 done
585 else
586 for x in ${SPARC64_CPUS}; do
587 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
588 done
589 fi
590
591 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
592 for x in ${SPARC64_CPUS}; do
593 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
594 done
595 else
596 for x in ${SPARC64_CPUS}; do
597 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
598 done
599 fi
600
601 export CFLAGS CXXFLAGS
602}
603
604# @FUNCTION: append-libs
605# @USAGE: <libs>
606# @DESCRIPTION:
607# Add extra <libs> to the current LIBS. All arguments should be prefixed with
608# either -l or -L. For compatibility, if arguments are not prefixed as
609# options, they are given a -l prefix automatically.
610append-libs() {
611 [[ $# -eq 0 ]] && return 0
612 local flag
613 for flag in "$@"; do
614 if [[ -z "${flag// }" ]]; then
615 eqawarn "Appending an empty argument to LIBS is invalid! Skipping."
616 continue
263 fi 617 fi
264 done 618 case $flag in
265 return 1 619 -[lL]*)
266} 620 export LIBS="${LIBS} ${flag}"
267 621 ;;
268replace-sparc64-flags() { 622 -*)
269 local SPARC64_CPUS="ultrasparc v9" 623 eqawarn "Appending non-library to LIBS (${flag}); Other linker flags should be passed via LDFLAGS"
270 624 export LIBS="${LIBS} ${flag}"
271 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 625 ;;
272 then 626 *)
273 for x in ${SPARC64_CPUS} 627 export LIBS="${LIBS} -l${flag}"
274 do 628 esac
275 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
276 done 629 done
277 else 630
278 for x in ${SPARC64_CPUS} 631 return 0
279 do 632}
280 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 633
634# @FUNCTION: raw-ldflags
635# @USAGE: [flags]
636# @DESCRIPTION:
637# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
638# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
639# to gcc where it needs the '-Wl,'.
640#
641# If no flags are specified, then default to ${LDFLAGS}.
642raw-ldflags() {
643 local x input="$@"
644 [[ -z ${input} ]] && input=${LDFLAGS}
645 set --
646 for x in ${input} ; do
647 case ${x} in
648 -Wl,*)
649 x=${x#-Wl,}
650 set -- "$@" ${x//,/ }
651 ;;
652 *) # Assume it's a compiler driver flag, so throw it away #441808
653 ;;
654 esac
281 done 655 done
656 echo "$@"
657}
658
659# @FUNCTION: no-as-needed
660# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
661no-as-needed() {
662 case $($(tc-getLD) -v 2>&1 </dev/null) in
663 *GNU*) # GNU ld
664 echo "-Wl,--no-as-needed" ;;
665 esac
666}
667
282 fi 668fi
283
284 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
285 then
286 for x in ${SPARC64_CPUS}
287 do
288 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
289 done
290 else
291 for x in ${SPARC64_CPUS}
292 do
293 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
294 done
295 fi
296}
297
298append-ldflags() {
299 LDFLAGS="${LDFLAGS} $@"
300 return 0
301}
302
303filter-ldflags() {
304 # we do this fancy spacing stuff so as to not filter
305 # out part of a flag ... we want flag atoms ! :D
306 LDFLAGS=" ${LDFLAGS} "
307 for x in "$@" ; do
308 LDFLAGS="${LDFLAGS// ${x} / }"
309 done
310 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
311 return 0
312}
313
314etexec-flags() {
315 has_version sys-devel/hardened-gcc
316 if [ $? == 0 ] ; then
317 if [ "`is-flag -yet_exec`" != "true" ]; then
318 debug-print ">>> appending flags -yet_exec"
319 append-flags -yet_exec
320 append-ldflags -yet_exec
321 fi
322 fi
323}
324
325fstack-flags() {
326 has_version sys-devel/hardened-gcc
327 if [ $? == 0 ] ; then
328 if [ "`is-flag -yno_propolice`" != "true" ]; then
329 debug-print ">>> appending flags -yno_propolice"
330 append-flags -yno_propolice
331 append-ldflags -yno_propolice
332 fi
333 fi
334}

Legend:
Removed from v.1.41  
changed lines
  Added in v.1.204

  ViewVC Help
Powered by ViewVC 1.1.20