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1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2013 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 1.79 2004/12/25 18:45:56 chriswhite Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.187 2013/01/12 14:32:31 jlec 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 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#### etexec-flags ####
62# hooked function for hardened gcc that appends
63# -fno-pic to {C,CXX,LD}FLAGS
64# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
65#
66#### fstack-flags ####
67# hooked function for hardened gcc that appends
68# -fno-stack-protector to {C,CXX,LD}FLAGS
69# when a package is filtering -fstack-protector, -fstack-protector-all
70# notice: modern automatic specs files will also suppress -fstack-protector-all
71# when only -fno-stack-protector is given
72#
73 22
74# 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
75setup-allowed-flags() { 25setup-allowed-flags() {
76 if [ -z "${ALLOWED_FLAGS}" ] ; then
77 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector" 28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
81 export ALLOWED_FLAGS="${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 "$@" ; do
82 case "${ARCH}" in 70 case "${f}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 71 # Ideally we should only concern ourselves with PIE flags,
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 72 # not -fPIC or -fpic, but too many places filter -fPIC without
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 73 # thinking about -fPIE.
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 74 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 75 gcc-specs-pie || continue
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;; 76 is-flagq -nopie || append-flags -nopie;;
89 ppc) ALLOWED_FLAGS="${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 $(test-flags -fstrict-overflow);;
90 esac 86 esac
91 fi 87 done
92 # allow a bunch of flags that negate features / control ABI 88}
93 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 89
94 case "${ARCH}" in 90# Remove occurrences of strings from variable given in $1
95 x86|amd64|ia64) ALLOWED_FLAGS="${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 " $* " in
214 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
215 *' '-L*|\
216 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
96 esac 217 esac
97 ALLOWED_FLAGS="${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 "$@"
98 219 append-cxxflags "$@"
99 # C[XX]FLAGS that we are think is ok, but needs testing 220 append-fflags "$@"
100 # NOTE: currently -Os have issues with gcc3 and K6* arch's
101 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
102 return 0 221 return 0
103} 222}
104 223
105filter-flags() { 224# @FUNCTION: replace-flags
106 local x f fset 225# @USAGE: <old> <new>
107 declare -a new_CFLAGS new_CXXFLAGS 226# @DESCRIPTION:
227# Replace the <old> flag with <new>. Accepts shell globs for <old>.
228replace-flags() {
229 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
108 230
109 for x in "$@" ; do 231 local f var new
110 case "${x}" in 232 for var in $(all-flag-vars) ; do
111 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
112 -fstack-protector|-fstack-protector-all) fstack-flags;;
113 esac
114 done
115
116 for fset in CFLAGS CXXFLAGS; do
117 # Looping over the flags instead of using a global 233 # Looping over the flags instead of using a global
118 # substitution ensures that we're working with flag atoms. 234 # substitution ensures that we're working with flag atoms.
119 # Otherwise globs like -O* have the potential to wipe out the 235 # Otherwise globs like -O* have the potential to wipe out the
120 # list of flags. 236 # list of flags.
237 new=()
121 for f in ${!fset}; do 238 for f in ${!var} ; do
122 for x in "$@"; do
123 # Note this should work with globs like -O*
124 [[ ${f} == ${x} ]] && continue 2
125 done
126 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
127 done
128 eval export ${fset}=\${new_${fset}\[*]}
129 done
130
131 return 0
132}
133
134filter-lfs-flags() {
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136}
137
138append-lfs-flags() {
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140}
141
142append-flags() {
143 export CFLAGS="${CFLAGS} $*"
144 export CXXFLAGS="${CXXFLAGS} $*"
145 [ -n "`is-flag -fno-stack-protector`" -o \
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
147 return 0
148}
149
150replace-flags() {
151 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS
153
154 for fset in CFLAGS CXXFLAGS; do
155 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms.
157 # Otherwise globs like -O* have the potential to wipe out the
158 # list of flags.
159 for f in ${!fset}; do
160 # Note this should work with globs like -O* 239 # Note this should work with globs like -O*
161 [[ ${f} == ${1} ]] && f=${2} 240 [[ ${f} == ${1} ]] && f=${2}
162 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 241 new+=( "${f}" )
163 done
164 eval export ${fset}=\${new_${fset}\[*]}
165 done 242 done
243 eval export ${var}=\""${new[*]}"\"
244 done
166 245
167 return 0 246 return 0
168} 247}
169 248
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>.
170replace-cpu-flags() { 254replace-cpu-flags() {
171 local newcpu="$#" ; newcpu="${!newcpu}" 255 local newcpu="$#" ; newcpu="${!newcpu}"
172 while [ $# -gt 1 ] ; do 256 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on 257 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags 258 # ${oldcpu}) prior to calling replace-flags
175 replace-flags "-march=${1}" "-march=${newcpu}" 259 replace-flags "-march=${1}" "-march=${newcpu}"
176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 260 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 261 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift 262 shift
179 done 263 done
180 return 0 264 return 0
181} 265}
182 266
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} "$1" && return 0
286 done
287 return 1
288}
289
290# @FUNCTION: is-flag
291# @USAGE: <flag>
292# @DESCRIPTION:
293# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
183is-flag() { 294is-flag() {
184 local x 295 is-flagq "$@" && echo true
185
186 for x in ${CFLAGS} ${CXXFLAGS} ; do
187 # Note this should work with globs like -mcpu=ultrasparc*
188 if [[ ${x} == ${1} ]]; then
189 echo true
190 return 0
191 fi
192 done
193 return 1
194} 296}
195 297
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.
196filter-mfpmath() { 321filter-mfpmath() {
197 local orig_mfpmath new_math prune_math 322 local orig_mfpmath new_math prune_math
198 323
199 # save the original -mfpmath flag 324 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`" 325 orig_mfpmath=$(get-flag -mfpmath)
201 # get the value of the current -mfpmath flag 326 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` " 327 new_math=$(get-flag mfpmath)
328 new_math=" ${new_math//,/ } "
203 # figure out which math values are to be removed 329 # figure out which math values are to be removed
204 prune_math="" 330 prune_math=""
205 for prune_math in "$@" ; do 331 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }" 332 new_math=${new_math/ ${prune_math} / }
207 done 333 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 334 new_math=$(echo ${new_math})
335 new_math=${new_math// /,}
209 336
210 if [ -z "${new_math}" ] ; then 337 if [[ -z ${new_math} ]] ; then
211 # if we're removing all user specified math values are 338 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag 339 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath} 340 filter-flags ${orig_mfpmath}
214 else 341 else
215 # if we only want to filter some of the user specified 342 # if we only want to filter some of the user specified
… …
217 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 344 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218 fi 345 fi
219 return 0 346 return 0
220} 347}
221 348
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().
222strip-flags() { 353strip-flags() {
223 local x y flag NEW_CFLAGS NEW_CXXFLAGS 354 local x y var
224 355
225 setup-allowed-flags 356 setup-allowed-flags
226 357
227 local NEW_CFLAGS="" 358 set -f # disable pathname expansion
228 local NEW_CXXFLAGS=""
229 359
230 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 360 for var in $(all-flag-vars) ; do
231 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 361 local new=()
232 use debug && einfo "Enabling the use of some unstable flags" 362
233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 363 for x in ${!var} ; do
364 local flag=${x%%=*}
365 for y in ${ALLOWED_FLAGS} ; do
366 if [[ -z ${flag%%${y}} ]] ; then
367 new+=( "${x}" )
368 break
369 fi
370 done
371 done
372
373 # In case we filtered out all optimization flags fallback to -O2
374 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
375 new+=( -O2 )
376 fi
377
378 eval export ${var}=\""${new[*]}"\"
379 done
380
381 set +f # re-enable pathname expansion
382
383 return 0
384}
385
386test-flag-PROG() {
387 local comp=$1
388 local lang=$2
389 local flag=$3
390
391 [[ -z ${comp} || -z ${flag} ]] && return 1
392
393 # use -c so we can test the assembler as well
394 local PROG=$(tc-get${comp})
395 if ${PROG} -c -o /dev/null -x${lang} - < /dev/null > /dev/null 2>&1 ; then
396 ${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \
397 > /dev/null 2>&1
398 else
399 ${PROG} "${flag}" -c -o /dev/null /dev/null > /dev/null 2>&1
234 fi 400 fi
401}
235 402
236 set -f # disable pathname expansion 403# @FUNCTION: test-flag-CC
404# @USAGE: <flag>
405# @DESCRIPTION:
406# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
407test-flag-CC() { test-flag-PROG "CC" c "$1"; }
237 408
238 for x in ${CFLAGS}; do 409# @FUNCTION: test-flag-CXX
239 for y in ${ALLOWED_FLAGS}; do 410# @USAGE: <flag>
240 flag=${x%%=*} 411# @DESCRIPTION:
241 if [ "${flag%%${y}}" = "" ] ; then 412# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
242 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 413test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
243 break 414
244 fi 415# @FUNCTION: test-flag-F77
416# @USAGE: <flag>
417# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
419test-flag-F77() { test-flag-PROG "F77" f77 "$1"; }
420
421# @FUNCTION: test-flag-FC
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
425test-flag-FC() { test-flag-PROG "FC" f95 "$1"; }
426
427test-flags-PROG() {
428 local comp=$1
429 local flags=()
430 local x
431
432 shift
433
434 [[ -z ${comp} ]] && return 1
435
436 for x ; do
437 test-flag-${comp} "${x}" && flags+=( "${x}" )
245 done 438 done
246 done
247 439
248 for x in ${CXXFLAGS}; do 440 echo "${flags[*]}"
249 for y in ${ALLOWED_FLAGS}; do
250 flag=${x%%=*}
251 if [ "${flag%%${y}}" = "" ] ; then
252 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
253 break
254 fi
255 done
256 done
257 441
258 # In case we filtered out all optimization flags fallback to -O2 442 # Just bail if we dont have any flags
259 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 443 [[ ${#flags[@]} -gt 0 ]]
260 NEW_CFLAGS="${NEW_CFLAGS} -O2"
261 fi
262 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
263 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
264 fi
265
266 set +f # re-enable pathname expansion
267
268 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}"
270 return 0
271} 444}
272 445
273test_flag() { 446# @FUNCTION: test-flags-CC
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 447# @USAGE: <flags>
275 printf "%s\n" "$*" 448# @DESCRIPTION:
276 return 0 449# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
277 fi 450test-flags-CC() { test-flags-PROG "CC" "$@"; }
278 return 1
279}
280 451
452# @FUNCTION: test-flags-CXX
453# @USAGE: <flags>
454# @DESCRIPTION:
455# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
456test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
457
458# @FUNCTION: test-flags-F77
459# @USAGE: <flags>
460# @DESCRIPTION:
461# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
462test-flags-F77() { test-flags-PROG "F77" "$@"; }
463
464# @FUNCTION: test-flags-FC
465# @USAGE: <flags>
466# @DESCRIPTION:
467# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
468test-flags-FC() { test-flags-PROG "FC" "$@"; }
469
470# @FUNCTION: test-flags
471# @USAGE: <flags>
472# @DESCRIPTION:
473# Short-hand that should hopefully work for both C and C++ compiler, but
474# its really only present due to the append-flags() abomination.
475test-flags() { test-flags-CC "$@"; }
476
477# @FUNCTION: test_version_info
478# @USAGE: <version>
479# @DESCRIPTION:
480# Returns shell true if the current C compiler version matches <version>, else returns shell false.
481# Accepts shell globs.
281test_version_info() { 482test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 483 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 484 return 0
284 else 485 else
285 return 1 486 return 1
286 fi 487 fi
287} 488}
288 489
490# @FUNCTION: strip-unsupported-flags
491# @DESCRIPTION:
492# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
289strip-unsupported-flags() { 493strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 494 export CFLAGS=$(test-flags-CC ${CFLAGS})
291 495 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
292 for x in ${CFLAGS} ; do 496 export FFLAGS=$(test-flags-F77 ${FFLAGS})
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 497 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
294 done
295 for x in ${CXXFLAGS} ; do
296 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
297 done
298
299 export CFLAGS="${NEW_CFLAGS}"
300 export CXXFLAGS="${NEW_CXXFLAGS}"
301} 498}
302 499
500# @FUNCTION: get-flag
501# @USAGE: <flag>
502# @DESCRIPTION:
503# Find and echo the value for a particular flag. Accepts shell globs.
303get-flag() { 504get-flag() {
304 local f findflag="$1" 505 local f var findflag="$1"
305 506
306 # this code looks a little flaky but seems to work for 507 # this code looks a little flaky but seems to work for
307 # everything we want ... 508 # everything we want ...
308 # for example, if CFLAGS="-march=i686": 509 # for example, if CFLAGS="-march=i686":
309 # `get-flag -march` == "-march=i686" 510 # `get-flag -march` == "-march=i686"
310 # `get-flag march` == "i686" 511 # `get-flag march` == "i686"
311 for f in ${CFLAGS} ${CXXFLAGS} ; do 512 for var in $(all-flag-vars) ; do
513 for f in ${!var} ; do
312 if [ "${f/${findflag}}" != "${f}" ] ; then 514 if [ "${f/${findflag}}" != "${f}" ] ; then
313 printf "%s\n" "${f/-${findflag}=}" 515 printf "%s\n" "${f/-${findflag}=}"
314 return 0 516 return 0
315 fi 517 fi
518 done
316 done 519 done
317 return 1 520 return 1
318} 521}
319 522
320has_hardened() { 523# @FUNCTION: has_m64
321 test_version_info Hardened && return 0 524# @DESCRIPTION:
322 # the specs file wont exist unless gcc has GCC_SPECS support 525# This doesn't test if the flag is accepted, it tests if the flag actually
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 526# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
324 return 0 527# return code is 0, else the return code is 1.
325 return 1
326}
327
328has_pic() {
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331 test_version_info pie && return 0
332 return 1
333}
334
335has_pie() {
336 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
337 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
338 test_version_info pie && return 0
339 return 1
340}
341
342has_ssp() {
343 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
344 test_version_info ssp && return 0
345 return 1
346}
347
348has_m64() { 528has_m64() {
529 eqawarn "${FUNCNAME}: don't use this anymore"
530
349 # this doesnt test if the flag is accepted, it tests if the flag 531 # this doesnt test if the flag is accepted, it tests if the flag
350 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 532 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
351 # please dont replace this function with test_flag in some future 533 # please dont replace this function with test_flag in some future
352 # clean-up! 534 # clean-up!
535
353 local temp="$(emktemp)" 536 local temp="$(emktemp)"
354 echo "int main() { return(0); }" > ${temp}.c 537 echo "int main() { return(0); }" > "${temp}".c
355 MY_CC=$(tc-getCC) 538 MY_CC=$(tc-getCC)
356 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 539 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
357 local ret=$? 540 local ret=$?
358 rm -f ${temp}.c 541 rm -f "${temp}".c
359 [ "$ret" != "1" ] && return 0 542 [[ ${ret} != 1 ]] && return 0
360 return 1 543 return 1
361} 544}
362 545
363has_m32() { 546has_m32() {
364 # this doesnt test if the flag is accepted, it tests if the flag 547 die "${FUNCNAME}: don't use this anymore"
365 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
366 # please dont replace this function with test_flag in some future
367 # clean-up!
368 local temp="$(emktemp)"
369 echo "int main() { return(0); }" > ${temp}.c
370 MY_CC=$(tc-getCC)
371 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
372 local ret=$?
373 rm -f ${temp}.c
374 [ "$ret" != "1" ] && return 0
375 return 1
376} 548}
377 549
550# @FUNCTION: replace-sparc64-flags
551# @DESCRIPTION:
552# Sets mcpu to v8 and uses the original value as mtune if none specified.
378replace-sparc64-flags() { 553replace-sparc64-flags() {
379 local SPARC64_CPUS="ultrasparc v9" 554 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
380 555
381 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 556 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
382 for x in ${SPARC64_CPUS}; do 557 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 558 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
384 done 559 done
385 else 560 else
386 for x in ${SPARC64_CPUS}; do 561 for x in ${SPARC64_CPUS}; do
387 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 562 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
388 done 563 done
389 fi 564 fi
390 565
391 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 566 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
392 for x in ${SPARC64_CPUS}; do 567 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 568 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
394 done 569 done
395 else 570 else
396 for x in ${SPARC64_CPUS}; do 571 for x in ${SPARC64_CPUS}; do
397 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 572 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
398 done 573 done
399 fi 574 fi
400 575
401 export CFLAGS CXXFLAGS 576 export CFLAGS CXXFLAGS
402} 577}
403 578
579# @FUNCTION: append-libs
580# @USAGE: <libs>
581# @DESCRIPTION:
582# Add extra <libs> to the current LIBS.
404append-ldflags() { 583append-libs() {
405 export LDFLAGS="${LDFLAGS} $*" 584 [[ $# -eq 0 ]] && return 0
406 return 0 585 local flag
407}
408
409filter-ldflags() {
410 local x
411
412 # we do this fancy spacing stuff so as to not filter
413 # out part of a flag ... we want flag atoms ! :D
414 LDFLAGS=" ${LDFLAGS} "
415 for x in "$@" ; do 586 for flag in "$@"; do
416 LDFLAGS="${LDFLAGS// ${x} / }" 587 [[ ${flag} == -l* ]] && flag=${flag#-l}
588 export LIBS="${LIBS} -l${flag}"
417 done 589 done
418 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
419 export LDFLAGS
420 return 0
421}
422 590
423etexec-flags() {
424 # if you're not using a hardened compiler you wont need this
425 # PIC/no-pic kludge in the first place.
426 has_hardened || return 0
427 use amd64 && return 0
428 use mips && return 0
429
430 if has_pie || has_pic; then
431 [ -z "`is-flag -fno-pic`" ] &&
432 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
433 [ -z "`is-flag -nopie`" ] &&
434 export CFLAGS="${CFLAGS} `test_flag -nopie`"
435 fi
436 return 0 591 return 0
437} 592}
438 593
439fstack-flags() { 594# @FUNCTION: raw-ldflags
440 if has_ssp; then 595# @USAGE: [flags]
441 [ -z "`is-flag -fno-stack-protector`" ] && 596# @DESCRIPTION:
442 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 597# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
443 fi 598# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
444 return 0 599# to gcc where it needs the '-Wl,'.
445}
446
447# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
448# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
449# fixes.
450# 600#
451# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 601# If no flags are specified, then default to ${LDFLAGS}.
452gcc2-flags() { 602raw-ldflags() {
453 CFLAGS=${CFLAGS//pentium-mmx/i586} 603 local x input="$@"
454 CFLAGS=${CFLAGS//pentium[234]/i686} 604 [[ -z ${input} ]] && input=${LDFLAGS}
455 CFLAGS=${CFLAGS//k6-[23]/k6} 605 set --
456 CFLAGS=${CFLAGS//athlon-tbird/i686} 606 for x in ${input} ; do
457 CFLAGS=${CFLAGS//athlon-4/i686} 607 case ${x} in
458 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 608 -Wl,*)
459 CFLAGS=${CFLAGS//athlon/i686} 609 x=${x#-Wl,}
610 set -- "$@" ${x//,/ }
611 ;;
612 *) # Assume it's a compiler driver flag, so throw it away #441808
613 ;;
614 esac
615 done
616 echo "$@"
617}
460 618
461 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 619# @FUNCTION: no-as-needed
462 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 620# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
463 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 621no-as-needed() {
464 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 622 case $($(tc-getLD) -v 2>&1 </dev/null) in
465 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 623 *GNU*) # GNU ld
466 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 624 echo "-Wl,--no-as-needed" ;;
467 CXXFLAGS=${CXXFLAGS//athlon/i686} 625 esac
626}
468 627
469 if [ "$ARCH" = alpha ]; then
470 CHOST=${CHOST/#alphaev6[78]/alphaev6}
471 CFLAGS=${CFLAGS//ev6[78]/ev6}
472 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
473 fi 628fi
474
475 export CFLAGS CXXFLAGS
476}
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