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1# Copyright 1999-2004 Gentoo Foundation 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 1.62 2004/07/15 04:59:44 lv Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.174 2012/06/05 02:07:44 dirtyepic Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic 5# @ECLASS: flag-o-matic.eclass
8INHERITED="$INHERITED $ECLASS" 6# @MAINTAINER:
9IUSE="$IUSE debug" 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.
10 12
11# 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
12#### filter-flags <flags> #### 14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
13# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags
15#
16#### append-flags <flags> ####
17# Add extra flags to your current C[XX]FLAGS
18#
19#### replace-flags <orig.flag> <new.flag> ###
20# Replace a flag by another one
21#
22#### replace-cpu-flags <new.cpu> <old.cpus> ###
23# Replace march/mcpu flags that specify <old.cpus>
24# with flags that specify <new.cpu>
25#
26#### is-flag <flag> ####
27# Returns "true" if flag is set in C[XX]FLAGS
28# Matches only complete a flag
29#
30#### strip-flags ####
31# Strip C[XX]FLAGS of everything except known
32# good options.
33#
34#### strip-unsupported-flags ####
35# Strip C[XX]FLAGS of any flags not supported by
36# installed version of gcc
37#
38#### get-flag <flag> ####
39# Find and echo the value for a particular flag
40#
41#### replace-sparc64-flags ####
42# Sets mcpu to v8 and uses the original value
43# as mtune if none specified.
44#
45#### filter-mfpmath <math types> ####
46# Remove specified math types from the fpmath specification
47# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
48# will leave the user with -mfpmath=386
49#
50#### append-ldflags ####
51# Add extra flags to your current LDFLAGS
52#
53#### filter-ldflags <flags> ####
54# Remove particular flags from LDFLAGS
55# Matches only complete flags
56#
57#### etexec-flags ####
58# hooked function for hardened gcc that appends
59# -fno-pic to {C,CXX,LD}FLAGS
60# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
61#
62#### fstack-flags ####
63# hooked function for hardened gcc that appends
64# -fno-stack-protector to {C,CXX,LD}FLAGS
65# when a package is filtering -fstack-protector, -fstack-protector-all
66# notice: modern automatic specs files will also suppress -fstack-protector-all
67# when only -fno-stack-protector is given
68#
69 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
70# 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
71setup-allowed-flags() { 25setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 26 ALLOWED_FLAGS="-pipe"
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -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 -mfloat-abi=* \
49 -D* -U*"
50
51 # 4.5
52 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
53 # 4.6
54 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
55
56 export ALLOWED_FLAGS
57 return 0
58}
59
60# inverted filters for hardened compiler. This is trying to unpick
61# the hardened compiler defaults.
62_filter-hardened() {
63 local f
64 for f in "$@" ; do
74 case "${ARCH}" in 65 case "${f}" in
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 66 # Ideally we should only concern ourselves with PIE flags,
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 67 # not -fPIC or -fpic, but too many places filter -fPIC without
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 68 # thinking about -fPIE.
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 69 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 70 gcc-specs-pie || continue
71 is-flagq -nopie || append-flags -nopie;;
72 -fstack-protector)
73 gcc-specs-ssp || continue
74 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
75 -fstack-protector-all)
76 gcc-specs-ssp-to-all || continue
77 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
78 -fno-strict-overflow)
79 gcc-specs-nostrict || continue
80 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
80 esac 81 esac
81 fi 82 done
82
83 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0
87} 83}
88 84
85# Remove occurrences of strings from variable given in $1
86# Strings removed are matched as globs, so for example
87# '-O*' would remove -O1, -O2 etc.
88_filter-var() {
89 local f x var=$1 new=()
90 shift
91
92 for f in ${!var} ; do
93 for x in "$@" ; do
94 # Note this should work with globs like -O*
95 [[ ${f} == ${x} ]] && continue 2
96 done
97 new+=( "${f}" )
98 done
99 eval export ${var}=\""${new[*]}"\"
100}
101
102# @FUNCTION: filter-flags
103# @USAGE: <flags>
104# @DESCRIPTION:
105# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
89filter-flags() { 106filter-flags() {
90 local x f fset 107 _filter-hardened "$@"
91 declare -a new_CFLAGS new_CXXFLAGS 108 local v
92 109 for v in $(all-flag-vars) ; do
93 for x in "$@" ; do 110 _filter-var ${v} "$@"
94 case "${x}" in
95 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
96 -fstack-protector|-fstack-protector-all) fstack-flags;;
97 esac
98 done
99
100 for fset in CFLAGS CXXFLAGS; do
101 for f in ${!fset}; do
102 for x in "$@"; do
103 # Note this should work with globs like -O*
104 [[ ${f} == ${x} ]] && continue 2
105 done
106 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
107 done 111 done
108 eval export ${fset}=\${new_${fset}\[*]}
109 done
110
111 return 0 112 return 0
112} 113}
113 114
115# @FUNCTION: filter-lfs-flags
116# @DESCRIPTION:
117# Remove flags that enable Large File Support.
114filter-lfs-flags() { 118filter-lfs-flags() {
119 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
120 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
121 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
122 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
123 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
115 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 124 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
116} 125}
117 126
127# @FUNCTION: filter-ldflags
128# @USAGE: <flags>
129# @DESCRIPTION:
130# Remove particular <flags> from LDFLAGS. Accepts shell globs.
131filter-ldflags() {
132 _filter-var LDFLAGS "$@"
133 return 0
134}
135
136# @FUNCTION: append-cppflags
137# @USAGE: <flags>
138# @DESCRIPTION:
139# Add extra <flags> to the current CPPFLAGS.
140append-cppflags() {
141 [[ $# -eq 0 ]] && return 0
142 export CPPFLAGS="${CPPFLAGS} $*"
143 return 0
144}
145
146# @FUNCTION: append-cflags
147# @USAGE: <flags>
148# @DESCRIPTION:
149# Add extra <flags> to the current CFLAGS.
150append-cflags() {
151 [[ $# -eq 0 ]] && return 0
152 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
153 return 0
154}
155
156# @FUNCTION: append-cxxflags
157# @USAGE: <flags>
158# @DESCRIPTION:
159# Add extra <flags> to the current CXXFLAGS.
160append-cxxflags() {
161 [[ $# -eq 0 ]] && return 0
162 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
163 return 0
164}
165
166# @FUNCTION: append-fflags
167# @USAGE: <flags>
168# @DESCRIPTION:
169# Add extra <flags> to the current {F,FC}FLAGS.
170append-fflags() {
171 [[ $# -eq 0 ]] && return 0
172 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
173 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
174 return 0
175}
176
177# @FUNCTION: append-lfs-flags
178# @DESCRIPTION:
179# Add flags that enable Large File Support.
118append-lfs-flags() { 180append-lfs-flags() {
181 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
182 # see comments in filter-lfs-flags func for meaning of these
119 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 183 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
120} 184}
121 185
186# @FUNCTION: append-ldflags
187# @USAGE: <flags>
188# @DESCRIPTION:
189# Add extra <flags> to the current LDFLAGS.
190append-ldflags() {
191 [[ $# -eq 0 ]] && return 0
192 local flag
193 for flag in "$@"; do
194 [[ ${flag} == -l* ]] && \
195 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
196 done
197
198 export LDFLAGS="${LDFLAGS} $*"
199 return 0
200}
201
202# @FUNCTION: append-flags
203# @USAGE: <flags>
204# @DESCRIPTION:
205# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
122append-flags() { 206append-flags() {
123 export CFLAGS="${CFLAGS} $*" 207 [[ $# -eq 0 ]] && return 0
124 export CXXFLAGS="${CXXFLAGS} $*" 208 case " $* " in
125 [ -n "`is-flag -fno-stack-protector`" -o \ 209 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 210 *' '-L*|\
211 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
212 esac
213 append-cflags "$@"
214 append-cxxflags "$@"
215 append-fflags "$@"
127 return 0 216 return 0
128} 217}
129 218
219# @FUNCTION: replace-flags
220# @USAGE: <old> <new>
221# @DESCRIPTION:
222# Replace the <old> flag with <new>. Accepts shell globs for <old>.
130replace-flags() { 223replace-flags() {
131 # we do this fancy spacing stuff so as to not filter 224 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
132 # out part of a flag ... we want flag atoms ! :D
133 CFLAGS=" ${CFLAGS} "
134 CXXFLAGS=" ${CXXFLAGS} "
135 CFLAGS="${CFLAGS// ${1} / ${2} }"
136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
139 export CFLAGS CXXFLAGS
140 return 0
141}
142 225
226 local f var new
227 for var in $(all-flag-vars) ; do
228 # Looping over the flags instead of using a global
229 # substitution ensures that we're working with flag atoms.
230 # Otherwise globs like -O* have the potential to wipe out the
231 # list of flags.
232 new=()
233 for f in ${!var} ; do
234 # Note this should work with globs like -O*
235 [[ ${f} == ${1} ]] && f=${2}
236 new+=( "${f}" )
237 done
238 eval export ${var}=\""${new[*]}"\"
239 done
240
241 return 0
242}
243
244# @FUNCTION: replace-cpu-flags
245# @USAGE: <old> <new>
246# @DESCRIPTION:
247# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
248# with flags that select the <new> cpu. Accepts shell globs for <old>.
143replace-cpu-flags() { 249replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift 250 local newcpu="$#" ; newcpu="${!newcpu}"
145 for oldcpu in "$@" ; do 251 while [ $# -gt 1 ] ; do
252 # quote to make sure that no globbing is done (particularly on
253 # ${oldcpu}) prior to calling replace-flags
146 replace-flags -march=${oldcpu} -march=${newcpu} 254 replace-flags "-march=${1}" "-march=${newcpu}"
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 255 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 256 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
257 shift
149 done 258 done
259 return 0
260}
261
262_is_flagq() {
263 local x
264 for x in ${!1} ; do
265 [[ ${x} == $2 ]] && return 0
266 done
150 return 0 267 return 1
151} 268}
152 269
270# @FUNCTION: is-flagq
271# @USAGE: <flag>
272# @DESCRIPTION:
273# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
274is-flagq() {
275 [[ -n $2 ]] && die "Usage: is-flag <flag>"
276
277 local var
278 for var in $(all-flag-vars) ; do
279 _is_flagq ${var} "$1" && return 0
280 done
281 return 1
282}
283
284# @FUNCTION: is-flag
285# @USAGE: <flag>
286# @DESCRIPTION:
287# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
153is-flag() { 288is-flag() {
154 local x 289 is-flagq "$@" && echo true
155
156 for x in ${CFLAGS} ${CXXFLAGS} ; do
157 if [ "${x}" == "$1" ] ; then
158 echo true
159 return 0
160 fi
161 done
162 return 1
163} 290}
164 291
292# @FUNCTION: is-ldflagq
293# @USAGE: <flag>
294# @DESCRIPTION:
295# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
296is-ldflagq() {
297 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
298 _is_flagq LDFLAGS $1
299}
300
301# @FUNCTION: is-ldflag
302# @USAGE: <flag>
303# @DESCRIPTION:
304# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
305is-ldflag() {
306 is-ldflagq "$@" && echo true
307}
308
309# @FUNCTION: filter-mfpmath
310# @USAGE: <math types>
311# @DESCRIPTION:
312# Remove specified math types from the fpmath flag. For example, if the user
313# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
314# -mfpmath=386.
165filter-mfpmath() { 315filter-mfpmath() {
166 local orig_mfpmath new_math prune_math 316 local orig_mfpmath new_math prune_math
167 317
168 # save the original -mfpmath flag 318 # save the original -mfpmath flag
169 orig_mfpmath="`get-flag -mfpmath`" 319 orig_mfpmath=$(get-flag -mfpmath)
170 # get the value of the current -mfpmath flag 320 # get the value of the current -mfpmath flag
171 new_math=" `get-flag mfpmath | tr , ' '` " 321 new_math=$(get-flag mfpmath)
322 new_math=" ${new_math//,/ } "
172 # figure out which math values are to be removed 323 # figure out which math values are to be removed
173 prune_math="" 324 prune_math=""
174 for prune_math in "$@" ; do 325 for prune_math in "$@" ; do
175 new_math="${new_math/ ${prune_math} / }" 326 new_math=${new_math/ ${prune_math} / }
176 done 327 done
177 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 328 new_math=$(echo ${new_math})
329 new_math=${new_math// /,}
178 330
179 if [ -z "${new_math}" ] ; then 331 if [[ -z ${new_math} ]] ; then
180 # if we're removing all user specified math values are 332 # if we're removing all user specified math values are
181 # slated for removal, then we just filter the flag 333 # slated for removal, then we just filter the flag
182 filter-flags ${orig_mfpmath} 334 filter-flags ${orig_mfpmath}
183 else 335 else
184 # if we only want to filter some of the user specified 336 # if we only want to filter some of the user specified
186 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 338 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
187 fi 339 fi
188 return 0 340 return 0
189} 341}
190 342
343# @FUNCTION: strip-flags
344# @DESCRIPTION:
345# Strip C[XX]FLAGS of everything except known good/safe flags.
191strip-flags() { 346strip-flags() {
192 local x y flag NEW_CFLAGS NEW_CXXFLAGS 347 local x y var
193 348
194 setup-allowed-flags 349 setup-allowed-flags
195 350
196 local NEW_CFLAGS=""
197 local NEW_CXXFLAGS=""
198
199 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
200 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
201 use debug && einfo "Enabling the use of some unstable flags"
202 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
203 fi
204
205 set -f # disable pathname expansion 351 set -f # disable pathname expansion
206 352
207 for x in ${CFLAGS}; do 353 for var in $(all-flag-vars) ; do
354 local new=()
355
356 for x in ${!var} ; do
357 local flag=${x%%=*}
208 for y in ${ALLOWED_FLAGS}; do 358 for y in ${ALLOWED_FLAGS} ; do
209 flag=${x%%=*}
210 if [ "${flag%%${y}}" = "" ]; then 359 if [[ -z ${flag%%${y}} ]] ; then
211 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 360 new+=( "${x}" )
212 break 361 break
213 fi 362 fi
214 done 363 done
215 done 364 done
216 365
217 for x in ${CXXFLAGS}; do
218 for y in ${ALLOWED_FLAGS}; do
219 flag=${x%%=*}
220 if [ "${flag%%${y}}" = "" ]; then
221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
222 break
223 fi
224 done
225 done
226
227 # In case we filtered out all optimization flags fallback to -O2 366 # In case we filtered out all optimization flags fallback to -O2
228 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 367 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
229 NEW_CFLAGS="${NEW_CFLAGS} -O2" 368 new+=( -O2 )
230 fi 369 fi
231 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 370
232 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 371 eval export ${var}=\""${new[*]}"\"
233 fi 372 done
234 373
235 set +f # re-enable pathname expansion 374 set +f # re-enable pathname expansion
236 375
237 export CFLAGS="${NEW_CFLAGS}"
238 export CXXFLAGS="${NEW_CXXFLAGS}"
239 return 0
240}
241
242test_flag() {
243 local cc=${CC:-gcc} ; cc=${cc%% *}
244 if ${cc} -S -xc "$@" -o /dev/null /dev/null &>/dev/null; then
245 printf "%s\n" "$*"
246 return 0 376 return 0
247 fi
248 return 1
249} 377}
250 378
379test-flag-PROG() {
380 local comp=$1
381 local flag=$2
382
383 [[ -z ${comp} || -z ${flag} ]] && return 1
384
385 # use -c so we can test the assembler as well
386 local PROG=$(tc-get${comp})
387 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
388 > /dev/null 2>&1
389}
390
391# @FUNCTION: test-flag-CC
392# @USAGE: <flag>
393# @DESCRIPTION:
394# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
395test-flag-CC() { test-flag-PROG "CC" "$1"; }
396
397# @FUNCTION: test-flag-CXX
398# @USAGE: <flag>
399# @DESCRIPTION:
400# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
401test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
402
403# @FUNCTION: test-flag-F77
404# @USAGE: <flag>
405# @DESCRIPTION:
406# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
407test-flag-F77() { test-flag-PROG "F77" "$1"; }
408
409# @FUNCTION: test-flag-FC
410# @USAGE: <flag>
411# @DESCRIPTION:
412# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
413test-flag-FC() { test-flag-PROG "FC" "$1"; }
414
415test-flags-PROG() {
416 local comp=$1
417 local flags
418 local x
419
420 shift
421
422 [[ -z ${comp} ]] && return 1
423
424 for x in "$@" ; do
425 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
426 done
427
428 echo "${flags}"
429
430 # Just bail if we dont have any flags
431 [[ -n ${flags} ]]
432}
433
434# @FUNCTION: test-flags-CC
435# @USAGE: <flags>
436# @DESCRIPTION:
437# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
438test-flags-CC() { test-flags-PROG "CC" "$@"; }
439
440# @FUNCTION: test-flags-CXX
441# @USAGE: <flags>
442# @DESCRIPTION:
443# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
444test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
445
446# @FUNCTION: test-flags-F77
447# @USAGE: <flags>
448# @DESCRIPTION:
449# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
450test-flags-F77() { test-flags-PROG "F77" "$@"; }
451
452# @FUNCTION: test-flags-FC
453# @USAGE: <flags>
454# @DESCRIPTION:
455# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
456test-flags-FC() { test-flags-PROG "FC" "$@"; }
457
458# @FUNCTION: test-flags
459# @USAGE: <flags>
460# @DESCRIPTION:
461# Short-hand that should hopefully work for both C and C++ compiler, but
462# its really only present due to the append-flags() abomination.
463test-flags() { test-flags-CC "$@"; }
464
465# @FUNCTION: test_version_info
466# @USAGE: <version>
467# @DESCRIPTION:
468# Returns shell true if the current C compiler version matches <version>, else returns shell false.
469# Accepts shell globs.
251test_version_info() { 470test_version_info() {
252 local cc=${CC:-gcc} ; cc=${cc%% *}
253 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 471 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
254 return 0 472 return 0
255 else 473 else
256 return 1 474 return 1
257 fi 475 fi
258} 476}
259 477
478# @FUNCTION: strip-unsupported-flags
479# @DESCRIPTION:
480# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
260strip-unsupported-flags() { 481strip-unsupported-flags() {
261 local NEW_CFLAGS NEW_CXXFLAGS 482 export CFLAGS=$(test-flags-CC ${CFLAGS})
262 483 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
263 for x in ${CFLAGS} ; do 484 export FFLAGS=$(test-flags-F77 ${FFLAGS})
264 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 485 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
265 done
266 for x in ${CXXFLAGS} ; do
267 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
268 done
269
270 export CFLAGS="${NEW_CFLAGS}"
271 export CXXFLAGS="${NEW_CXXFLAGS}"
272} 486}
273 487
488# @FUNCTION: get-flag
489# @USAGE: <flag>
490# @DESCRIPTION:
491# Find and echo the value for a particular flag. Accepts shell globs.
274get-flag() { 492get-flag() {
275 local f findflag="$1" 493 local f var findflag="$1"
276 494
277 # this code looks a little flaky but seems to work for 495 # this code looks a little flaky but seems to work for
278 # everything we want ... 496 # everything we want ...
279 # for example, if CFLAGS="-march=i686": 497 # for example, if CFLAGS="-march=i686":
280 # `get-flag -march` == "-march=i686" 498 # `get-flag -march` == "-march=i686"
281 # `get-flag march` == "i686" 499 # `get-flag march` == "i686"
282 for f in ${CFLAGS} ${CXXFLAGS} ; do 500 for var in $(all-flag-vars) ; do
501 for f in ${!var} ; do
283 if [ "${f/${findflag}}" != "${f}" ] ; then 502 if [ "${f/${findflag}}" != "${f}" ] ; then
284 printf "%s\n" "${f/-${findflag}=}" 503 printf "%s\n" "${f/-${findflag}=}"
285 return 0 504 return 0
286 fi 505 fi
506 done
287 done 507 done
288 return 1 508 return 1
289} 509}
290 510
291has_hardened() { 511# @FUNCTION: has_m64
292 test_version_info Hardened 512# @DESCRIPTION:
293 return $? 513# This doesn't test if the flag is accepted, it tests if the flag actually
294} 514# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
295 515# return code is 0, else the return code is 1.
296has_pic() {
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
299 test_version_info pie && return 0
300 return 1
301}
302
303has_pie() {
304 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
305 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
306 test_version_info pie && return 0
307 return 1
308}
309
310has_ssp() {
311 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
312 test_version_info ssp && return 0
313 return 1
314}
315
316has_m64() { 516has_m64() {
517 eqawarn "${FUNCNAME}: don't use this anymore"
518
317 # this doesnt test if the flag is accepted, it tests if the flag 519 # this doesnt test if the flag is accepted, it tests if the flag
318 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 520 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
319 # please dont replace this function with test_flag in some future 521 # please dont replace this function with test_flag in some future
320 # clean-up! 522 # clean-up!
321 temp=`mktemp` 523
524 local temp="$(emktemp)"
322 echo "int main() { return(0); }" > ${temp}.c 525 echo "int main() { return(0); }" > "${temp}".c
323 ${CC/ .*/} -m64 -o /dev/null ${temp}.c > /dev/null 2>&1 526 MY_CC=$(tc-getCC)
324 ret=$? 527 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
528 local ret=$?
325 rm -f ${temp}.c 529 rm -f "${temp}".c
326 [ "$ret" != "1" ] && return 0 530 [[ ${ret} != 1 ]] && return 0
327 return 1 531 return 1
328} 532}
329 533
330has_m32() { 534has_m32() {
331 # this doesnt test if the flag is accepted, it tests if the flag 535 die "${FUNCNAME}: don't use this anymore"
332 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
333 # please dont replace this function with test_flag in some future
334 # clean-up!
335 temp=`mktemp`
336 echo "int main() { return(0); }" > ${temp}.c
337 ${CC/ .*/} -m32 -o /dev/null ${temp}.c > /dev/null 2>&1
338 ret=$?
339 rm -f ${temp}.c
340 [ "$ret" != "1" ] && return 0
341 return 1
342} 536}
343 537
538# @FUNCTION: replace-sparc64-flags
539# @DESCRIPTION:
540# Sets mcpu to v8 and uses the original value as mtune if none specified.
344replace-sparc64-flags() { 541replace-sparc64-flags() {
345 local SPARC64_CPUS="ultrasparc v9" 542 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
346 543
347 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 544 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
348 for x in ${SPARC64_CPUS}; do 545 for x in ${SPARC64_CPUS}; do
349 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 546 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
350 done 547 done
351 else 548 else
352 for x in ${SPARC64_CPUS}; do 549 for x in ${SPARC64_CPUS}; do
353 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 550 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
354 done 551 done
355 fi 552 fi
356 553
357 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 554 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
358 for x in ${SPARC64_CPUS}; do 555 for x in ${SPARC64_CPUS}; do
359 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 556 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
360 done 557 done
361 else 558 else
362 for x in ${SPARC64_CPUS}; do 559 for x in ${SPARC64_CPUS}; do
363 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 560 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
364 done 561 done
365 fi 562 fi
366 563
367 export CFLAGS CXXFLAGS 564 export CFLAGS CXXFLAGS
368} 565}
369 566
567# @FUNCTION: append-libs
568# @USAGE: <libs>
569# @DESCRIPTION:
570# Add extra <libs> to the current LIBS.
370append-ldflags() { 571append-libs() {
371 export LDFLAGS="${LDFLAGS} $*" 572 [[ $# -eq 0 ]] && return 0
372 return 0 573 local flag
373}
374
375filter-ldflags() {
376 local x
377
378 # we do this fancy spacing stuff so as to not filter
379 # out part of a flag ... we want flag atoms ! :D
380 LDFLAGS=" ${LDFLAGS} "
381 for x in "$@" ; do 574 for flag in "$@"; do
382 LDFLAGS="${LDFLAGS// ${x} / }" 575 [[ ${flag} == -l* ]] && flag=${flag#-l}
576 export LIBS="${LIBS} -l${flag}"
383 done 577 done
384 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
385 export LDFLAGS
386 return 0
387}
388 578
389etexec-flags() { 579 return 0
390 # if you're not using a hardened compiler you wont need this 580}
391 # PIC/no-pic kludge in the first place.
392 has_hardened || return 0
393 581
394 if has_pie || has_pic; then 582# @FUNCTION: raw-ldflags
395 [ -z "`is-flag -fno-pic`" ] && 583# @USAGE: [flags]
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`" 584# @DESCRIPTION:
397 [ -z "`is-flag -nopie`" ] && 585# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
398 export CFLAGS="${CFLAGS} `test_flag -nopie`" 586# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
587# to gcc where it needs the '-Wl,'.
588#
589# If no flags are specified, then default to ${LDFLAGS}.
590raw-ldflags() {
591 local x input="$@"
592 [[ -z ${input} ]] && input=${LDFLAGS}
593 set --
594 for x in ${input} ; do
595 x=${x#-Wl,}
596 set -- "$@" ${x//,/ }
597 done
598 echo "$@"
599}
600
601# @FUNCTION: no-as-needed
602# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
603no-as-needed() {
604 case $($(tc-getLD) -v 2>&1 </dev/null) in
605 *GNU*) # GNU ld
606 echo "-Wl,--no-as-needed" ;;
607 esac
608}
609
399 fi 610fi
400 return 0
401}
402
403fstack-flags() {
404 if has_ssp; then
405 [ -z "`is-flag -fno-stack-protector`" ] &&
406 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
407 fi
408 return 0
409}

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