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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 1.82 2005/02/07 17:50:24 solar Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.181 2012/11/11 20:00:57 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
10IUSE="debug" 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
11 15
12# need access to emktemp()
13inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
14 17
15# 18# Return all the flag variables that our high level funcs operate on.
16#### filter-flags <flags> #### 19all-flag-vars() {
17# Remove particular flags from C[XX]FLAGS 20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
18# Matches only complete flags 21}
19#
20#### append-flags <flags> ####
21# Add extra flags to your current C[XX]FLAGS
22#
23#### replace-flags <orig.flag> <new.flag> ###
24# Replace a flag by another one
25#
26#### replace-cpu-flags <old.cpus> <new.cpu> ###
27# Replace march/mcpu flags that specify <old.cpus>
28# with flags that specify <new.cpu>
29#
30#### is-flag <flag> ####
31# Returns "true" if flag is set in C[XX]FLAGS
32# Matches only complete a flag
33#
34#### strip-flags ####
35# Strip C[XX]FLAGS of everything except known
36# good options.
37#
38#### strip-unsupported-flags ####
39# Strip C[XX]FLAGS of any flags not supported by
40# installed version of gcc
41#
42#### get-flag <flag> ####
43# Find and echo the value for a particular flag
44#
45#### replace-sparc64-flags ####
46# Sets mcpu to v8 and uses the original value
47# as mtune if none specified.
48#
49#### filter-mfpmath <math types> ####
50# Remove specified math types from the fpmath specification
51# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52# will leave the user with -mfpmath=386
53#
54#### append-ldflags ####
55# Add extra flags to your current LDFLAGS
56#
57#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS
59# Matches only complete flags
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 22
69# 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
70setup-allowed-flags() { 25setup-allowed-flags() {
71 if [ -z "${ALLOWED_FLAGS}" ] ; then
72 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
73 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
74 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector" 28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
75 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
76 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 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 # 4.7
56 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
57
58 # CPPFLAGS and LDFLAGS
59 ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
60
61 export ALLOWED_FLAGS
62 return 0
63}
64
65# inverted filters for hardened compiler. This is trying to unpick
66# the hardened compiler defaults.
67_filter-hardened() {
68 local f
69 for f in "$@" ; do
77 case "${ARCH}" in 70 case "${f}" in
78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 71 # Ideally we should only concern ourselves with PIE flags,
79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 72 # not -fPIC or -fpic, but too many places filter -fPIC without
80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 73 # thinking about -fPIE.
81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 74 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 75 gcc-specs-pie || continue
83 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;; 76 is-flagq -nopie || append-flags -nopie;;
84 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;; 77 -fstack-protector)
78 gcc-specs-ssp || continue
79 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
80 -fstack-protector-all)
81 gcc-specs-ssp-to-all || continue
82 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
83 -fno-strict-overflow)
84 gcc-specs-nostrict || continue
85 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
85 esac 86 esac
86 fi 87 done
87 # allow a bunch of flags that negate features / control ABI 88}
88 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 89
89 case "${ARCH}" in 90# Remove occurrences of strings from variable given in $1
90 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 91# Strings removed are matched as globs, so for example
92# '-O*' would remove -O1, -O2 etc.
93_filter-var() {
94 local f x var=$1 new=()
95 shift
96
97 for f in ${!var} ; do
98 for x in "$@" ; do
99 # Note this should work with globs like -O*
100 [[ ${f} == ${x} ]] && continue 2
101 done
102 new+=( "${f}" )
103 done
104 eval export ${var}=\""${new[*]}"\"
105}
106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
111filter-flags() {
112 _filter-hardened "$@"
113 local v
114 for v in $(all-flag-vars) ; do
115 _filter-var ${v} "$@"
116 done
117 return 0
118}
119
120# @FUNCTION: filter-lfs-flags
121# @DESCRIPTION:
122# Remove flags that enable Large File Support.
123filter-lfs-flags() {
124 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
125 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
126 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
127 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
128 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
129 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
130}
131
132# @FUNCTION: filter-ldflags
133# @USAGE: <flags>
134# @DESCRIPTION:
135# Remove particular <flags> from LDFLAGS. Accepts shell globs.
136filter-ldflags() {
137 _filter-var LDFLAGS "$@"
138 return 0
139}
140
141# @FUNCTION: append-cppflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CPPFLAGS.
145append-cppflags() {
146 [[ $# -eq 0 ]] && return 0
147 export CPPFLAGS="${CPPFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CFLAGS.
155append-cflags() {
156 [[ $# -eq 0 ]] && return 0
157 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
158 return 0
159}
160
161# @FUNCTION: append-cxxflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current CXXFLAGS.
165append-cxxflags() {
166 [[ $# -eq 0 ]] && return 0
167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
168 return 0
169}
170
171# @FUNCTION: append-fflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current {F,FC}FLAGS.
175append-fflags() {
176 [[ $# -eq 0 ]] && return 0
177 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
179 return 0
180}
181
182# @FUNCTION: append-lfs-flags
183# @DESCRIPTION:
184# Add flags that enable Large File Support.
185append-lfs-flags() {
186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # see comments in filter-lfs-flags func for meaning of these
188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189}
190
191# @FUNCTION: append-ldflags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to the current LDFLAGS.
195append-ldflags() {
196 [[ $# -eq 0 ]] && return 0
197 local flag
198 for flag in "$@"; do
199 [[ ${flag} == -l* ]] && \
200 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
201 done
202
203 export LDFLAGS="${LDFLAGS} $*"
204 return 0
205}
206
207# @FUNCTION: append-flags
208# @USAGE: <flags>
209# @DESCRIPTION:
210# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
211append-flags() {
212 [[ $# -eq 0 ]] && return 0
213 case " $* " in
214 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
215 *' '-L*|\
216 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
91 esac 217 esac
92 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias" 218 append-cflags "$@"
93 219 append-cxxflags "$@"
94 # C[XX]FLAGS that we are think is ok, but needs testing 220 append-fflags "$@"
95 # NOTE: currently -Os have issues with gcc3 and K6* arch's
96 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
97 return 0 221 return 0
98} 222}
99 223
100filter-flags() { 224# @FUNCTION: replace-flags
101 local x f fset 225# @USAGE: <old> <new>
102 declare -a new_CFLAGS new_CXXFLAGS 226# @DESCRIPTION:
227# Replace the <old> flag with <new>. Accepts shell globs for <old>.
228replace-flags() {
229 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
103 230
104 for x in "$@" ; do 231 local f var new
105 case "${x}" in 232 for var in $(all-flag-vars) ; do
106 -fPIC|-fpic|-fPIE|-fpie|-pie)
107 append-flags `test_flag -fno-pie`;;
108 -fstack-protector|-fstack-protector-all)
109 fstack-flags;;
110 esac
111 done
112
113 for fset in CFLAGS CXXFLAGS; do
114 # Looping over the flags instead of using a global 233 # Looping over the flags instead of using a global
115 # substitution ensures that we're working with flag atoms. 234 # substitution ensures that we're working with flag atoms.
116 # Otherwise globs like -O* have the potential to wipe out the 235 # Otherwise globs like -O* have the potential to wipe out the
117 # list of flags. 236 # list of flags.
237 new=()
118 for f in ${!fset}; do 238 for f in ${!var} ; do
119 for x in "$@"; do
120 # Note this should work with globs like -O*
121 [[ ${f} == ${x} ]] && continue 2
122 done
123 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
124 done
125 eval export ${fset}=\${new_${fset}\[*]}
126 done
127
128 return 0
129}
130
131filter-lfs-flags() {
132 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
133}
134
135append-lfs-flags() {
136 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
137}
138
139append-flags() {
140 [[ -z $* ]] && return 0
141 export CFLAGS="${CFLAGS} $*"
142 export CXXFLAGS="${CXXFLAGS} $*"
143 [ -n "`is-flag -fno-stack-protector`" -o \
144 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
145 return 0
146}
147
148replace-flags() {
149 local f fset
150 declare -a new_CFLAGS new_CXXFLAGS
151
152 for fset in CFLAGS CXXFLAGS; do
153 # Looping over the flags instead of using a global
154 # substitution ensures that we're working with flag atoms.
155 # Otherwise globs like -O* have the potential to wipe out the
156 # list of flags.
157 for f in ${!fset}; do
158 # Note this should work with globs like -O* 239 # Note this should work with globs like -O*
159 [[ ${f} == ${1} ]] && f=${2} 240 [[ ${f} == ${1} ]] && f=${2}
160 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 241 new+=( "${f}" )
161 done
162 eval export ${fset}=\${new_${fset}\[*]}
163 done 242 done
243 eval export ${var}=\""${new[*]}"\"
244 done
164 245
165 return 0 246 return 0
166} 247}
167 248
249# @FUNCTION: replace-cpu-flags
250# @USAGE: <old> <new>
251# @DESCRIPTION:
252# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
253# with flags that select the <new> cpu. Accepts shell globs for <old>.
168replace-cpu-flags() { 254replace-cpu-flags() {
169 local newcpu="$#" ; newcpu="${!newcpu}" 255 local newcpu="$#" ; newcpu="${!newcpu}"
170 while [ $# -gt 1 ] ; do 256 while [ $# -gt 1 ] ; do
171 # quote to make sure that no globbing is done (particularly on 257 # quote to make sure that no globbing is done (particularly on
172 # ${oldcpu} prior to calling replace-flags 258 # ${oldcpu}) prior to calling replace-flags
173 replace-flags "-march=${1}" "-march=${newcpu}" 259 replace-flags "-march=${1}" "-march=${newcpu}"
174 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 260 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
175 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 261 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
176 shift 262 shift
177 done 263 done
178 return 0 264 return 0
179} 265}
180 266
267_is_flagq() {
268 local x var
269 eval var=\""\${$1[*]}"\"
270 for x in ${var} ; do
271 [[ ${x} == $2 ]] && return 0
272 done
273 return 1
274}
275
276# @FUNCTION: is-flagq
277# @USAGE: <flag>
278# @DESCRIPTION:
279# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
280is-flagq() {
281 [[ -n $2 ]] && die "Usage: is-flag <flag>"
282
283 local var
284 for var in $(all-flag-vars) ; do
285 _is_flagq ${var} "$1" && return 0
286 done
287 return 1
288}
289
290# @FUNCTION: is-flag
291# @USAGE: <flag>
292# @DESCRIPTION:
293# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
181is-flag() { 294is-flag() {
182 local x 295 is-flagq "$@" && echo true
183
184 for x in ${CFLAGS} ${CXXFLAGS} ; do
185 # Note this should work with globs like -mcpu=ultrasparc*
186 if [[ ${x} == ${1} ]]; then
187 echo true
188 return 0
189 fi
190 done
191 return 1
192} 296}
193 297
298# @FUNCTION: is-ldflagq
299# @USAGE: <flag>
300# @DESCRIPTION:
301# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
302is-ldflagq() {
303 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
304 _is_flagq LDFLAGS $1
305}
306
307# @FUNCTION: is-ldflag
308# @USAGE: <flag>
309# @DESCRIPTION:
310# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
311is-ldflag() {
312 is-ldflagq "$@" && echo true
313}
314
315# @FUNCTION: filter-mfpmath
316# @USAGE: <math types>
317# @DESCRIPTION:
318# Remove specified math types from the fpmath flag. For example, if the user
319# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
320# -mfpmath=386.
194filter-mfpmath() { 321filter-mfpmath() {
195 local orig_mfpmath new_math prune_math 322 local orig_mfpmath new_math prune_math
196 323
197 # save the original -mfpmath flag 324 # save the original -mfpmath flag
198 orig_mfpmath="`get-flag -mfpmath`" 325 orig_mfpmath=$(get-flag -mfpmath)
199 # get the value of the current -mfpmath flag 326 # get the value of the current -mfpmath flag
200 new_math=" `get-flag mfpmath | tr , ' '` " 327 new_math=$(get-flag mfpmath)
328 new_math=" ${new_math//,/ } "
201 # figure out which math values are to be removed 329 # figure out which math values are to be removed
202 prune_math="" 330 prune_math=""
203 for prune_math in "$@" ; do 331 for prune_math in "$@" ; do
204 new_math="${new_math/ ${prune_math} / }" 332 new_math=${new_math/ ${prune_math} / }
205 done 333 done
206 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 334 new_math=$(echo ${new_math})
335 new_math=${new_math// /,}
207 336
208 if [ -z "${new_math}" ] ; then 337 if [[ -z ${new_math} ]] ; then
209 # if we're removing all user specified math values are 338 # if we're removing all user specified math values are
210 # slated for removal, then we just filter the flag 339 # slated for removal, then we just filter the flag
211 filter-flags ${orig_mfpmath} 340 filter-flags ${orig_mfpmath}
212 else 341 else
213 # if we only want to filter some of the user specified 342 # if we only want to filter some of the user specified
215 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 344 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
216 fi 345 fi
217 return 0 346 return 0
218} 347}
219 348
349# @FUNCTION: strip-flags
350# @DESCRIPTION:
351# Strip *FLAGS of everything except known good/safe flags. This runs over all
352# flags returned by all_flag_vars().
220strip-flags() { 353strip-flags() {
221 local x y flag NEW_CFLAGS NEW_CXXFLAGS 354 local x y var
222 355
223 setup-allowed-flags 356 setup-allowed-flags
224 357
225 local NEW_CFLAGS=""
226 local NEW_CXXFLAGS=""
227
228 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
229 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
230 use debug && einfo "Enabling the use of some unstable flags"
231 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
232 fi
233
234 set -f # disable pathname expansion 358 set -f # disable pathname expansion
235 359
236 for x in ${CFLAGS}; do 360 for var in $(all-flag-vars) ; do
361 local new=()
362
363 for x in ${!var} ; do
364 local flag=${x%%=*}
237 for y in ${ALLOWED_FLAGS}; do 365 for y in ${ALLOWED_FLAGS} ; do
238 flag=${x%%=*}
239 if [ "${flag%%${y}}" = "" ] ; then 366 if [[ -z ${flag%%${y}} ]] ; then
240 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 367 new+=( "${x}" )
241 break 368 break
242 fi 369 fi
243 done 370 done
244 done 371 done
245 372
246 for x in ${CXXFLAGS}; do
247 for y in ${ALLOWED_FLAGS}; do
248 flag=${x%%=*}
249 if [ "${flag%%${y}}" = "" ] ; then
250 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
251 break
252 fi
253 done
254 done
255
256 # In case we filtered out all optimization flags fallback to -O2 373 # In case we filtered out all optimization flags fallback to -O2
257 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 374 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
258 NEW_CFLAGS="${NEW_CFLAGS} -O2" 375 new+=( -O2 )
259 fi 376 fi
260 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 377
261 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 378 eval export ${var}=\""${new[*]}"\"
262 fi 379 done
263 380
264 set +f # re-enable pathname expansion 381 set +f # re-enable pathname expansion
265 382
266 export CFLAGS="${NEW_CFLAGS}"
267 export CXXFLAGS="${NEW_CXXFLAGS}"
268 return 0
269}
270
271test_flag() {
272 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
273 printf "%s\n" "$*"
274 return 0 383 return 0
275 fi
276 return 1
277} 384}
278 385
386test-flag-PROG() {
387 local comp=$1
388 local flag=$2
389
390 [[ -z ${comp} || -z ${flag} ]] && return 1
391
392 # use -c so we can test the assembler as well
393 local PROG=$(tc-get${comp})
394 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
395 > /dev/null 2>&1
396}
397
398# @FUNCTION: test-flag-CC
399# @USAGE: <flag>
400# @DESCRIPTION:
401# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
402test-flag-CC() { test-flag-PROG "CC" "$1"; }
403
404# @FUNCTION: test-flag-CXX
405# @USAGE: <flag>
406# @DESCRIPTION:
407# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
408test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
409
410# @FUNCTION: test-flag-F77
411# @USAGE: <flag>
412# @DESCRIPTION:
413# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
414test-flag-F77() { test-flag-PROG "F77" "$1"; }
415
416# @FUNCTION: test-flag-FC
417# @USAGE: <flag>
418# @DESCRIPTION:
419# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
420test-flag-FC() { test-flag-PROG "FC" "$1"; }
421
422test-flags-PROG() {
423 local comp=$1
424 local flags
425 local x
426
427 shift
428
429 [[ -z ${comp} ]] && return 1
430
431 for x in "$@" ; do
432 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
433 done
434
435 echo "${flags}"
436
437 # Just bail if we dont have any flags
438 [[ -n ${flags} ]]
439}
440
441# @FUNCTION: test-flags-CC
442# @USAGE: <flags>
443# @DESCRIPTION:
444# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
445test-flags-CC() { test-flags-PROG "CC" "$@"; }
446
447# @FUNCTION: test-flags-CXX
448# @USAGE: <flags>
449# @DESCRIPTION:
450# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
451test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
452
453# @FUNCTION: test-flags-F77
454# @USAGE: <flags>
455# @DESCRIPTION:
456# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
457test-flags-F77() { test-flags-PROG "F77" "$@"; }
458
459# @FUNCTION: test-flags-FC
460# @USAGE: <flags>
461# @DESCRIPTION:
462# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
463test-flags-FC() { test-flags-PROG "FC" "$@"; }
464
465# @FUNCTION: test-flags
466# @USAGE: <flags>
467# @DESCRIPTION:
468# Short-hand that should hopefully work for both C and C++ compiler, but
469# its really only present due to the append-flags() abomination.
470test-flags() { test-flags-CC "$@"; }
471
472# @FUNCTION: test_version_info
473# @USAGE: <version>
474# @DESCRIPTION:
475# Returns shell true if the current C compiler version matches <version>, else returns shell false.
476# Accepts shell globs.
279test_version_info() { 477test_version_info() {
280 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 478 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
281 return 0 479 return 0
282 else 480 else
283 return 1 481 return 1
284 fi 482 fi
285} 483}
286 484
485# @FUNCTION: strip-unsupported-flags
486# @DESCRIPTION:
487# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
287strip-unsupported-flags() { 488strip-unsupported-flags() {
288 local NEW_CFLAGS NEW_CXXFLAGS 489 export CFLAGS=$(test-flags-CC ${CFLAGS})
289 490 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
290 for x in ${CFLAGS} ; do 491 export FFLAGS=$(test-flags-F77 ${FFLAGS})
291 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 492 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
292 done
293 for x in ${CXXFLAGS} ; do
294 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
295 done
296
297 export CFLAGS="${NEW_CFLAGS}"
298 export CXXFLAGS="${NEW_CXXFLAGS}"
299} 493}
300 494
495# @FUNCTION: get-flag
496# @USAGE: <flag>
497# @DESCRIPTION:
498# Find and echo the value for a particular flag. Accepts shell globs.
301get-flag() { 499get-flag() {
302 local f findflag="$1" 500 local f var findflag="$1"
303 501
304 # this code looks a little flaky but seems to work for 502 # this code looks a little flaky but seems to work for
305 # everything we want ... 503 # everything we want ...
306 # for example, if CFLAGS="-march=i686": 504 # for example, if CFLAGS="-march=i686":
307 # `get-flag -march` == "-march=i686" 505 # `get-flag -march` == "-march=i686"
308 # `get-flag march` == "i686" 506 # `get-flag march` == "i686"
309 for f in ${CFLAGS} ${CXXFLAGS} ; do 507 for var in $(all-flag-vars) ; do
508 for f in ${!var} ; do
310 if [ "${f/${findflag}}" != "${f}" ] ; then 509 if [ "${f/${findflag}}" != "${f}" ] ; then
311 printf "%s\n" "${f/-${findflag}=}" 510 printf "%s\n" "${f/-${findflag}=}"
312 return 0 511 return 0
313 fi 512 fi
513 done
314 done 514 done
315 return 1 515 return 1
316} 516}
317 517
318has_hardened() { 518# @FUNCTION: has_m64
319 test_version_info Hardened && return 0 519# @DESCRIPTION:
320 # the specs file wont exist unless gcc has GCC_SPECS support 520# This doesn't test if the flag is accepted, it tests if the flag actually
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 521# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
322 return 0 522# return code is 0, else the return code is 1.
323 return 1
324}
325
326# indicate whether PIC is set
327has_pic() {
328 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
329 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
330 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
331 test_version_info pie && return 0
332 return 1
333}
334
335# indicate whether PIE is set
336has_pie() {
337 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
338 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
339 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
340 # test PIC while waiting for specs to be updated to generate __PIE__
341 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
342 return 1
343}
344
345# indicate whether code for SSP is being generated
346has_ssp() {
347 # note; this matches both -fstack-protector and -fstack-protector-all
348 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
349 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
350 return 1
351}
352
353has_m64() { 523has_m64() {
524 eqawarn "${FUNCNAME}: don't use this anymore"
525
354 # this doesnt test if the flag is accepted, it tests if the flag 526 # this doesnt test if the flag is accepted, it tests if the flag
355 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 527 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
356 # please dont replace this function with test_flag in some future 528 # please dont replace this function with test_flag in some future
357 # clean-up! 529 # clean-up!
530
358 local temp="$(emktemp)" 531 local temp="$(emktemp)"
359 echo "int main() { return(0); }" > ${temp}.c 532 echo "int main() { return(0); }" > "${temp}".c
360 MY_CC=$(tc-getCC) 533 MY_CC=$(tc-getCC)
361 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 534 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
362 local ret=$? 535 local ret=$?
363 rm -f ${temp}.c 536 rm -f "${temp}".c
364 [ "$ret" != "1" ] && return 0 537 [[ ${ret} != 1 ]] && return 0
365 return 1 538 return 1
366} 539}
367 540
368has_m32() { 541has_m32() {
369 # this doesnt test if the flag is accepted, it tests if the flag 542 die "${FUNCNAME}: don't use this anymore"
370 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
371 # please dont replace this function with test_flag in some future
372 # clean-up!
373
374 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
375
376 local temp="$(emktemp)"
377 echo "int main() { return(0); }" > ${temp}.c
378 MY_CC=$(tc-getCC)
379 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
380 local ret=$?
381 rm -f ${temp}.c
382 [ "$ret" != "1" ] && return 0
383 return 1
384} 543}
385 544
545# @FUNCTION: replace-sparc64-flags
546# @DESCRIPTION:
547# Sets mcpu to v8 and uses the original value as mtune if none specified.
386replace-sparc64-flags() { 548replace-sparc64-flags() {
387 local SPARC64_CPUS="ultrasparc v9" 549 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
388 550
389 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 551 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
390 for x in ${SPARC64_CPUS}; do 552 for x in ${SPARC64_CPUS}; do
391 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 553 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
392 done 554 done
393 else 555 else
394 for x in ${SPARC64_CPUS}; do 556 for x in ${SPARC64_CPUS}; do
395 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 557 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
396 done 558 done
397 fi 559 fi
398 560
399 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 561 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
400 for x in ${SPARC64_CPUS}; do 562 for x in ${SPARC64_CPUS}; do
401 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 563 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
402 done 564 done
403 else 565 else
404 for x in ${SPARC64_CPUS}; do 566 for x in ${SPARC64_CPUS}; do
405 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 567 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
406 done 568 done
407 fi 569 fi
408 570
409 export CFLAGS CXXFLAGS 571 export CFLAGS CXXFLAGS
410} 572}
411 573
574# @FUNCTION: append-libs
575# @USAGE: <libs>
576# @DESCRIPTION:
577# Add extra <libs> to the current LIBS.
412append-ldflags() { 578append-libs() {
413 export LDFLAGS="${LDFLAGS} $*" 579 [[ $# -eq 0 ]] && return 0
414 return 0 580 local flag
415}
416
417filter-ldflags() {
418 local x
419
420 # we do this fancy spacing stuff so as to not filter
421 # out part of a flag ... we want flag atoms ! :D
422 LDFLAGS=" ${LDFLAGS} "
423 for x in "$@" ; do 581 for flag in "$@"; do
424 LDFLAGS="${LDFLAGS// ${x} / }" 582 [[ ${flag} == -l* ]] && flag=${flag#-l}
583 export LIBS="${LIBS} -l${flag}"
425 done 584 done
426 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
427 export LDFLAGS
428 return 0
429}
430 585
431fstack-flags() {
432 if has_ssp; then
433 [ -z "`is-flag -fno-stack-protector`" ] &&
434 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
435 fi
436 return 0 586 return 0
437} 587}
438 588
439# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 589# @FUNCTION: raw-ldflags
440# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 590# @USAGE: [flags]
441# fixes. 591# @DESCRIPTION:
592# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
593# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
594# to gcc where it needs the '-Wl,'.
442# 595#
443# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 596# If no flags are specified, then default to ${LDFLAGS}.
444gcc2-flags() { 597raw-ldflags() {
445 CFLAGS=${CFLAGS//pentium-mmx/i586} 598 local x input="$@"
446 CFLAGS=${CFLAGS//pentium[234]/i686} 599 [[ -z ${input} ]] && input=${LDFLAGS}
447 CFLAGS=${CFLAGS//k6-[23]/k6} 600 set --
448 CFLAGS=${CFLAGS//athlon-tbird/i686} 601 for x in ${input} ; do
449 CFLAGS=${CFLAGS//athlon-4/i686} 602 case ${x} in
450 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 603 -Wl,*)
451 CFLAGS=${CFLAGS//athlon/i686} 604 x=${x#-Wl,}
605 set -- "$@" ${x//,/ }
606 ;;
607 *) # Assume it's a compiler driver flag, so throw it away #441808
608 ;;
609 esac
610 done
611 echo "$@"
612}
452 613
453 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 614# @FUNCTION: no-as-needed
454 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 615# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
455 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 616no-as-needed() {
456 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 617 case $($(tc-getLD) -v 2>&1 </dev/null) in
457 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 618 *GNU*) # GNU ld
458 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 619 echo "-Wl,--no-as-needed" ;;
459 CXXFLAGS=${CXXFLAGS//athlon/i686} 620 esac
621}
460 622
461 if [ "$ARCH" = alpha ]; then
462 CHOST=${CHOST/#alphaev6[78]/alphaev6}
463 CFLAGS=${CFLAGS//ev6[78]/ev6}
464 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
465 fi 623fi
466
467 export CFLAGS CXXFLAGS
468}

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