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1# Copyright 1999-2005 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 1.84 2005/03/18 03:48:14 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.173 2012/05/31 00:29:06 vapier Exp $
4 4
5ECLASS=flag-o-matic 5# @ECLASS: flag-o-matic.eclass
6INHERITED="$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.
7 12
8IUSE="debug" 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
9 15
10# need access to emktemp()
11inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
12 17
13# 18# Return all the flag variables that our high level funcs operate on.
14#### filter-flags <flags> #### 19all-flag-vars() {
15# Remove particular flags from C[XX]FLAGS 20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
16# Matches only complete flags 21}
17#
18#### append-flags <flags> ####
19# Add extra flags to your current C[XX]FLAGS
20#
21#### replace-flags <orig.flag> <new.flag> ###
22# Replace a flag by another one
23#
24#### replace-cpu-flags <old.cpus> <new.cpu> ###
25# Replace march/mcpu flags that specify <old.cpus>
26# with flags that specify <new.cpu>
27#
28#### is-flag <flag> ####
29# Returns "true" if flag is set in C[XX]FLAGS
30# Matches only complete a flag
31#
32#### strip-flags ####
33# Strip C[XX]FLAGS of everything except known
34# good options.
35#
36#### strip-unsupported-flags ####
37# Strip C[XX]FLAGS of any flags not supported by
38# installed version of gcc
39#
40#### get-flag <flag> ####
41# Find and echo the value for a particular flag
42#
43#### replace-sparc64-flags ####
44# Sets mcpu to v8 and uses the original value
45# as mtune if none specified.
46#
47#### filter-mfpmath <math types> ####
48# Remove specified math types from the fpmath specification
49# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
50# will leave the user with -mfpmath=386
51#
52#### append-ldflags ####
53# Add extra flags to your current LDFLAGS
54#
55#### filter-ldflags <flags> ####
56# Remove particular flags from LDFLAGS
57# Matches only complete flags
58#
59#### fstack-flags ####
60# hooked function for hardened gcc that appends
61# -fno-stack-protector to {C,CXX,LD}FLAGS
62# when a package is filtering -fstack-protector, -fstack-protector-all
63# notice: modern automatic specs files will also suppress -fstack-protector-all
64# when only -fno-stack-protector is given
65#
66 22
67# 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
68setup-allowed-flags() { 25setup-allowed-flags() {
69 if [[ -z ${ALLOWED_FLAGS} ]] ; then
70 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
71 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
72 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector" 28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
73 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
74 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"
75 case $(tc-arch) in 31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
76 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
77 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 33 ALLOWED_FLAGS+=" -W* -w"
78 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 34
79 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 35 # allow a bunch of flags that negate features / control ABI
80 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
81 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;; 37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
82 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;; 38 -fno-omit-frame-pointer"
39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
49
50 # 4.5
51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
52 # 4.6
53 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
54
55 export ALLOWED_FLAGS
56 return 0
57}
58
59# inverted filters for hardened compiler. This is trying to unpick
60# the hardened compiler defaults.
61_filter-hardened() {
62 local f
63 for f in "$@" ; do
64 case "${f}" in
65 # Ideally we should only concern ourselves with PIE flags,
66 # not -fPIC or -fpic, but too many places filter -fPIC without
67 # thinking about -fPIE.
68 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
69 gcc-specs-pie || continue
70 is-flagq -nopie || append-flags -nopie;;
71 -fstack-protector)
72 gcc-specs-ssp || continue
73 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
74 -fstack-protector-all)
75 gcc-specs-ssp-to-all || continue
76 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
77 -fno-strict-overflow)
78 gcc-specs-nostrict || continue
79 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
83 esac 80 esac
84 fi 81 done
85 # allow a bunch of flags that negate features / control ABI 82}
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 83
87 case $(tc-arch) in 84# Remove occurrences of strings from variable given in $1
88 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 85# Strings removed are matched as globs, so for example
86# '-O*' would remove -O1, -O2 etc.
87_filter-var() {
88 local f x var=$1 new=()
89 shift
90
91 for f in ${!var} ; do
92 for x in "$@" ; do
93 # Note this should work with globs like -O*
94 [[ ${f} == ${x} ]] && continue 2
95 done
96 new+=( "${f}" )
97 done
98 eval export ${var}=\""${new[*]}"\"
99}
100
101# @FUNCTION: filter-flags
102# @USAGE: <flags>
103# @DESCRIPTION:
104# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
105filter-flags() {
106 _filter-hardened "$@"
107 local v
108 for v in $(all-flag-vars) ; do
109 _filter-var ${v} "$@"
110 done
111 return 0
112}
113
114# @FUNCTION: filter-lfs-flags
115# @DESCRIPTION:
116# Remove flags that enable Large File Support.
117filter-lfs-flags() {
118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
124}
125
126# @FUNCTION: filter-ldflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Remove particular <flags> from LDFLAGS. Accepts shell globs.
130filter-ldflags() {
131 _filter-var LDFLAGS "$@"
132 return 0
133}
134
135# @FUNCTION: append-cppflags
136# @USAGE: <flags>
137# @DESCRIPTION:
138# Add extra <flags> to the current CPPFLAGS.
139append-cppflags() {
140 [[ $# -eq 0 ]] && return 0
141 export CPPFLAGS="${CPPFLAGS} $*"
142 return 0
143}
144
145# @FUNCTION: append-cflags
146# @USAGE: <flags>
147# @DESCRIPTION:
148# Add extra <flags> to the current CFLAGS.
149append-cflags() {
150 [[ $# -eq 0 ]] && return 0
151 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
152 return 0
153}
154
155# @FUNCTION: append-cxxflags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to the current CXXFLAGS.
159append-cxxflags() {
160 [[ $# -eq 0 ]] && return 0
161 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
162 return 0
163}
164
165# @FUNCTION: append-fflags
166# @USAGE: <flags>
167# @DESCRIPTION:
168# Add extra <flags> to the current {F,FC}FLAGS.
169append-fflags() {
170 [[ $# -eq 0 ]] && return 0
171 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
172 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
173 return 0
174}
175
176# @FUNCTION: append-lfs-flags
177# @DESCRIPTION:
178# Add flags that enable Large File Support.
179append-lfs-flags() {
180 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
181 # see comments in filter-lfs-flags func for meaning of these
182 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
183}
184
185# @FUNCTION: append-ldflags
186# @USAGE: <flags>
187# @DESCRIPTION:
188# Add extra <flags> to the current LDFLAGS.
189append-ldflags() {
190 [[ $# -eq 0 ]] && return 0
191 local flag
192 for flag in "$@"; do
193 [[ ${flag} == -l* ]] && \
194 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
195 done
196
197 export LDFLAGS="${LDFLAGS} $*"
198 return 0
199}
200
201# @FUNCTION: append-flags
202# @USAGE: <flags>
203# @DESCRIPTION:
204# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
205append-flags() {
206 [[ $# -eq 0 ]] && return 0
207 case " $* " in
208 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
209 *' '-L*|\
210 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
89 esac 211 esac
90 ALLOWED_FLAGS="${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" 212 append-cflags "$@"
91 213 append-cxxflags "$@"
92 # C[XX]FLAGS that we are think is ok, but needs testing 214 append-fflags "$@"
93 # NOTE: currently -Os have issues with gcc3 and K6* arch's
94 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
95 return 0 215 return 0
96} 216}
97 217
98filter-flags() { 218# @FUNCTION: replace-flags
99 local x f fset 219# @USAGE: <old> <new>
100 declare -a new_CFLAGS new_CXXFLAGS 220# @DESCRIPTION:
221# Replace the <old> flag with <new>. Accepts shell globs for <old>.
222replace-flags() {
223 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
101 224
102 for x in "$@" ; do 225 local f var new
103 case "${x}" in 226 for var in $(all-flag-vars) ; do
104 -fPIC|-fpic|-fPIE|-fpie|-pie)
105 append-flags `test_flag -fno-pie`;;
106 -fstack-protector|-fstack-protector-all)
107 fstack-flags;;
108 esac
109 done
110
111 for fset in CFLAGS CXXFLAGS; do
112 # Looping over the flags instead of using a global 227 # Looping over the flags instead of using a global
113 # substitution ensures that we're working with flag atoms. 228 # substitution ensures that we're working with flag atoms.
114 # Otherwise globs like -O* have the potential to wipe out the 229 # Otherwise globs like -O* have the potential to wipe out the
115 # list of flags. 230 # list of flags.
231 new=()
116 for f in ${!fset}; do 232 for f in ${!var} ; do
117 for x in "$@"; do
118 # Note this should work with globs like -O*
119 [[ ${f} == ${x} ]] && continue 2
120 done
121 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
122 done
123 eval export ${fset}=\${new_${fset}\[*]}
124 done
125
126 return 0
127}
128
129filter-lfs-flags() {
130 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
131}
132
133append-lfs-flags() {
134 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135}
136
137append-flags() {
138 [[ -z $* ]] && return 0
139 export CFLAGS="${CFLAGS} $*"
140 export CXXFLAGS="${CXXFLAGS} $*"
141 [ -n "`is-flag -fno-stack-protector`" -o \
142 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
143 return 0
144}
145
146replace-flags() {
147 local f fset
148 declare -a new_CFLAGS new_CXXFLAGS
149
150 for fset in CFLAGS CXXFLAGS; do
151 # Looping over the flags instead of using a global
152 # substitution ensures that we're working with flag atoms.
153 # Otherwise globs like -O* have the potential to wipe out the
154 # list of flags.
155 for f in ${!fset}; do
156 # Note this should work with globs like -O* 233 # Note this should work with globs like -O*
157 [[ ${f} == ${1} ]] && f=${2} 234 [[ ${f} == ${1} ]] && f=${2}
158 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 235 new+=( "${f}" )
159 done
160 eval export ${fset}=\${new_${fset}\[*]}
161 done 236 done
237 eval export ${var}=\""${new[*]}"\"
238 done
162 239
163 return 0 240 return 0
164} 241}
165 242
243# @FUNCTION: replace-cpu-flags
244# @USAGE: <old> <new>
245# @DESCRIPTION:
246# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
247# with flags that select the <new> cpu. Accepts shell globs for <old>.
166replace-cpu-flags() { 248replace-cpu-flags() {
167 local newcpu="$#" ; newcpu="${!newcpu}" 249 local newcpu="$#" ; newcpu="${!newcpu}"
168 while [ $# -gt 1 ] ; do 250 while [ $# -gt 1 ] ; do
169 # quote to make sure that no globbing is done (particularly on 251 # quote to make sure that no globbing is done (particularly on
170 # ${oldcpu} prior to calling replace-flags 252 # ${oldcpu}) prior to calling replace-flags
171 replace-flags "-march=${1}" "-march=${newcpu}" 253 replace-flags "-march=${1}" "-march=${newcpu}"
172 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 254 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
173 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 255 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
174 shift 256 shift
175 done 257 done
176 return 0 258 return 0
177} 259}
178 260
261_is_flagq() {
262 local x
263 for x in ${!1} ; do
264 [[ ${x} == $2 ]] && return 0
265 done
266 return 1
267}
268
269# @FUNCTION: is-flagq
270# @USAGE: <flag>
271# @DESCRIPTION:
272# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
273is-flagq() {
274 [[ -n $2 ]] && die "Usage: is-flag <flag>"
275
276 local var
277 for var in $(all-flag-vars) ; do
278 _is_flagq ${var} "$1" && return 0
279 done
280 return 1
281}
282
283# @FUNCTION: is-flag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
179is-flag() { 287is-flag() {
180 local x 288 is-flagq "$@" && echo true
181
182 for x in ${CFLAGS} ${CXXFLAGS} ; do
183 # Note this should work with globs like -mcpu=ultrasparc*
184 if [[ ${x} == ${1} ]]; then
185 echo true
186 return 0
187 fi
188 done
189 return 1
190} 289}
191 290
291# @FUNCTION: is-ldflagq
292# @USAGE: <flag>
293# @DESCRIPTION:
294# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
295is-ldflagq() {
296 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
297 _is_flagq LDFLAGS $1
298}
299
300# @FUNCTION: is-ldflag
301# @USAGE: <flag>
302# @DESCRIPTION:
303# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
304is-ldflag() {
305 is-ldflagq "$@" && echo true
306}
307
308# @FUNCTION: filter-mfpmath
309# @USAGE: <math types>
310# @DESCRIPTION:
311# Remove specified math types from the fpmath flag. For example, if the user
312# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
313# -mfpmath=386.
192filter-mfpmath() { 314filter-mfpmath() {
193 local orig_mfpmath new_math prune_math 315 local orig_mfpmath new_math prune_math
194 316
195 # save the original -mfpmath flag 317 # save the original -mfpmath flag
196 orig_mfpmath="`get-flag -mfpmath`" 318 orig_mfpmath=$(get-flag -mfpmath)
197 # get the value of the current -mfpmath flag 319 # get the value of the current -mfpmath flag
198 new_math=" `get-flag mfpmath | tr , ' '` " 320 new_math=$(get-flag mfpmath)
321 new_math=" ${new_math//,/ } "
199 # figure out which math values are to be removed 322 # figure out which math values are to be removed
200 prune_math="" 323 prune_math=""
201 for prune_math in "$@" ; do 324 for prune_math in "$@" ; do
202 new_math="${new_math/ ${prune_math} / }" 325 new_math=${new_math/ ${prune_math} / }
203 done 326 done
204 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 327 new_math=$(echo ${new_math})
328 new_math=${new_math// /,}
205 329
206 if [ -z "${new_math}" ] ; then 330 if [[ -z ${new_math} ]] ; then
207 # if we're removing all user specified math values are 331 # if we're removing all user specified math values are
208 # slated for removal, then we just filter the flag 332 # slated for removal, then we just filter the flag
209 filter-flags ${orig_mfpmath} 333 filter-flags ${orig_mfpmath}
210 else 334 else
211 # if we only want to filter some of the user specified 335 # if we only want to filter some of the user specified
213 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 337 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
214 fi 338 fi
215 return 0 339 return 0
216} 340}
217 341
342# @FUNCTION: strip-flags
343# @DESCRIPTION:
344# Strip C[XX]FLAGS of everything except known good/safe flags.
218strip-flags() { 345strip-flags() {
219 local x y flag NEW_CFLAGS NEW_CXXFLAGS 346 local x y var
220 347
221 setup-allowed-flags 348 setup-allowed-flags
222 349
223 local NEW_CFLAGS=""
224 local NEW_CXXFLAGS=""
225
226 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
227 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
228 use debug && einfo "Enabling the use of some unstable flags"
229 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
230 fi
231
232 set -f # disable pathname expansion 350 set -f # disable pathname expansion
233 351
234 for x in ${CFLAGS}; do 352 for var in $(all-flag-vars) ; do
353 local new=()
354
355 for x in ${!var} ; do
356 local flag=${x%%=*}
235 for y in ${ALLOWED_FLAGS}; do 357 for y in ${ALLOWED_FLAGS} ; do
236 flag=${x%%=*}
237 if [ "${flag%%${y}}" = "" ] ; then 358 if [[ -z ${flag%%${y}} ]] ; then
238 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 359 new+=( "${x}" )
239 break 360 break
240 fi 361 fi
241 done 362 done
242 done 363 done
243 364
244 for x in ${CXXFLAGS}; do
245 for y in ${ALLOWED_FLAGS}; do
246 flag=${x%%=*}
247 if [ "${flag%%${y}}" = "" ] ; then
248 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
249 break
250 fi
251 done
252 done
253
254 # In case we filtered out all optimization flags fallback to -O2 365 # In case we filtered out all optimization flags fallback to -O2
255 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 366 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
256 NEW_CFLAGS="${NEW_CFLAGS} -O2" 367 new+=( -O2 )
257 fi 368 fi
258 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 369
259 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 370 eval export ${var}=\""${new[*]}"\"
260 fi 371 done
261 372
262 set +f # re-enable pathname expansion 373 set +f # re-enable pathname expansion
263 374
264 export CFLAGS="${NEW_CFLAGS}"
265 export CXXFLAGS="${NEW_CXXFLAGS}"
266 return 0
267}
268
269test_flag() {
270 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
271 printf "%s\n" "$*"
272 return 0 375 return 0
273 fi
274 return 1
275} 376}
276 377
378test-flag-PROG() {
379 local comp=$1
380 local flag=$2
381
382 [[ -z ${comp} || -z ${flag} ]] && return 1
383
384 # use -c so we can test the assembler as well
385 local PROG=$(tc-get${comp})
386 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
387 > /dev/null 2>&1
388}
389
390# @FUNCTION: test-flag-CC
391# @USAGE: <flag>
392# @DESCRIPTION:
393# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
394test-flag-CC() { test-flag-PROG "CC" "$1"; }
395
396# @FUNCTION: test-flag-CXX
397# @USAGE: <flag>
398# @DESCRIPTION:
399# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
400test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
401
402# @FUNCTION: test-flag-F77
403# @USAGE: <flag>
404# @DESCRIPTION:
405# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
406test-flag-F77() { test-flag-PROG "F77" "$1"; }
407
408# @FUNCTION: test-flag-FC
409# @USAGE: <flag>
410# @DESCRIPTION:
411# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
412test-flag-FC() { test-flag-PROG "FC" "$1"; }
413
414test-flags-PROG() {
415 local comp=$1
416 local flags
417 local x
418
419 shift
420
421 [[ -z ${comp} ]] && return 1
422
423 for x in "$@" ; do
424 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
425 done
426
427 echo "${flags}"
428
429 # Just bail if we dont have any flags
430 [[ -n ${flags} ]]
431}
432
433# @FUNCTION: test-flags-CC
434# @USAGE: <flags>
435# @DESCRIPTION:
436# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
437test-flags-CC() { test-flags-PROG "CC" "$@"; }
438
439# @FUNCTION: test-flags-CXX
440# @USAGE: <flags>
441# @DESCRIPTION:
442# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
443test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
444
445# @FUNCTION: test-flags-F77
446# @USAGE: <flags>
447# @DESCRIPTION:
448# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
449test-flags-F77() { test-flags-PROG "F77" "$@"; }
450
451# @FUNCTION: test-flags-FC
452# @USAGE: <flags>
453# @DESCRIPTION:
454# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
455test-flags-FC() { test-flags-PROG "FC" "$@"; }
456
457# @FUNCTION: test-flags
458# @USAGE: <flags>
459# @DESCRIPTION:
460# Short-hand that should hopefully work for both C and C++ compiler, but
461# its really only present due to the append-flags() abomination.
462test-flags() { test-flags-CC "$@"; }
463
464# @FUNCTION: test_version_info
465# @USAGE: <version>
466# @DESCRIPTION:
467# Returns shell true if the current C compiler version matches <version>, else returns shell false.
468# Accepts shell globs.
277test_version_info() { 469test_version_info() {
278 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 470 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
279 return 0 471 return 0
280 else 472 else
281 return 1 473 return 1
282 fi 474 fi
283} 475}
284 476
477# @FUNCTION: strip-unsupported-flags
478# @DESCRIPTION:
479# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
285strip-unsupported-flags() { 480strip-unsupported-flags() {
286 local NEW_CFLAGS NEW_CXXFLAGS 481 export CFLAGS=$(test-flags-CC ${CFLAGS})
287 482 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
288 for x in ${CFLAGS} ; do 483 export FFLAGS=$(test-flags-F77 ${FFLAGS})
289 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 484 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
290 done
291 for x in ${CXXFLAGS} ; do
292 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
293 done
294
295 export CFLAGS="${NEW_CFLAGS}"
296 export CXXFLAGS="${NEW_CXXFLAGS}"
297} 485}
298 486
487# @FUNCTION: get-flag
488# @USAGE: <flag>
489# @DESCRIPTION:
490# Find and echo the value for a particular flag. Accepts shell globs.
299get-flag() { 491get-flag() {
300 local f findflag="$1" 492 local f var findflag="$1"
301 493
302 # this code looks a little flaky but seems to work for 494 # this code looks a little flaky but seems to work for
303 # everything we want ... 495 # everything we want ...
304 # for example, if CFLAGS="-march=i686": 496 # for example, if CFLAGS="-march=i686":
305 # `get-flag -march` == "-march=i686" 497 # `get-flag -march` == "-march=i686"
306 # `get-flag march` == "i686" 498 # `get-flag march` == "i686"
307 for f in ${CFLAGS} ${CXXFLAGS} ; do 499 for var in $(all-flag-vars) ; do
500 for f in ${!var} ; do
308 if [ "${f/${findflag}}" != "${f}" ] ; then 501 if [ "${f/${findflag}}" != "${f}" ] ; then
309 printf "%s\n" "${f/-${findflag}=}" 502 printf "%s\n" "${f/-${findflag}=}"
310 return 0 503 return 0
311 fi 504 fi
505 done
312 done 506 done
313 return 1 507 return 1
314} 508}
315 509
316has_hardened() { 510# @FUNCTION: has_m64
317 test_version_info Hardened && return 0 511# @DESCRIPTION:
318 # the specs file wont exist unless gcc has GCC_SPECS support 512# This doesn't test if the flag is accepted, it tests if the flag actually
319 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 513# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
320 return 0 514# return code is 0, else the return code is 1.
321 return 1
322}
323
324# indicate whether PIC is set
325has_pic() {
326 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
327 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
328 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
329 test_version_info pie && return 0
330 return 1
331}
332
333# indicate whether PIE is set
334has_pie() {
335 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
336 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
337 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
338 # test PIC while waiting for specs to be updated to generate __PIE__
339 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
340 return 1
341}
342
343# indicate whether code for SSP is being generated
344has_ssp() {
345 # note; this matches both -fstack-protector and -fstack-protector-all
346 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
347 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
348 return 1
349}
350
351has_m64() { 515has_m64() {
516 eqawarn "${FUNCNAME}: don't use this anymore"
517
352 # this doesnt test if the flag is accepted, it tests if the flag 518 # this doesnt test if the flag is accepted, it tests if the flag
353 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 519 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
354 # please dont replace this function with test_flag in some future 520 # please dont replace this function with test_flag in some future
355 # clean-up! 521 # clean-up!
522
356 local temp="$(emktemp)" 523 local temp="$(emktemp)"
357 echo "int main() { return(0); }" > ${temp}.c 524 echo "int main() { return(0); }" > "${temp}".c
358 MY_CC=$(tc-getCC) 525 MY_CC=$(tc-getCC)
359 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 526 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
360 local ret=$? 527 local ret=$?
361 rm -f ${temp}.c 528 rm -f "${temp}".c
362 [ "$ret" != "1" ] && return 0 529 [[ ${ret} != 1 ]] && return 0
363 return 1 530 return 1
364} 531}
365 532
366has_m32() { 533has_m32() {
367 # this doesnt test if the flag is accepted, it tests if the flag 534 die "${FUNCNAME}: don't use this anymore"
368 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
369 # please dont replace this function with test_flag in some future
370 # clean-up!
371
372 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
373
374 local temp="$(emktemp)"
375 echo "int main() { return(0); }" > ${temp}.c
376 MY_CC=$(tc-getCC)
377 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
378 local ret=$?
379 rm -f ${temp}.c
380 [ "$ret" != "1" ] && return 0
381 return 1
382} 535}
383 536
537# @FUNCTION: replace-sparc64-flags
538# @DESCRIPTION:
539# Sets mcpu to v8 and uses the original value as mtune if none specified.
384replace-sparc64-flags() { 540replace-sparc64-flags() {
385 local SPARC64_CPUS="ultrasparc v9" 541 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
386 542
387 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 543 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
388 for x in ${SPARC64_CPUS}; do 544 for x in ${SPARC64_CPUS}; do
389 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 545 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
390 done 546 done
391 else 547 else
392 for x in ${SPARC64_CPUS}; do 548 for x in ${SPARC64_CPUS}; do
393 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 549 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
394 done 550 done
395 fi 551 fi
396 552
397 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 553 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
398 for x in ${SPARC64_CPUS}; do 554 for x in ${SPARC64_CPUS}; do
399 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 555 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
400 done 556 done
401 else 557 else
402 for x in ${SPARC64_CPUS}; do 558 for x in ${SPARC64_CPUS}; do
403 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 559 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
404 done 560 done
405 fi 561 fi
406 562
407 export CFLAGS CXXFLAGS 563 export CFLAGS CXXFLAGS
408} 564}
409 565
566# @FUNCTION: append-libs
567# @USAGE: <libs>
568# @DESCRIPTION:
569# Add extra <libs> to the current LIBS.
410append-ldflags() { 570append-libs() {
411 export LDFLAGS="${LDFLAGS} $*" 571 [[ $# -eq 0 ]] && return 0
412 return 0 572 local flag
413}
414
415filter-ldflags() {
416 local x
417
418 # we do this fancy spacing stuff so as to not filter
419 # out part of a flag ... we want flag atoms ! :D
420 LDFLAGS=" ${LDFLAGS} "
421 for x in "$@" ; do 573 for flag in "$@"; do
422 LDFLAGS=${LDFLAGS// ${x} / } 574 [[ ${flag} == -l* ]] && flag=${flag#-l}
575 export LIBS="${LIBS} -l${flag}"
423 done 576 done
424 [[ -z ${LDFLAGS// } ]] \
425 && LDFLAGS="" \
426 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
427 export LDFLAGS
428 return 0
429}
430 577
431fstack-flags() {
432 if has_ssp; then
433 [ -z "`is-flag -fno-stack-protector`" ] &&
434 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
435 fi
436 return 0 578 return 0
437} 579}
438 580
439# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 581# @FUNCTION: raw-ldflags
440# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 582# @USAGE: [flags]
441# fixes. 583# @DESCRIPTION:
584# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
585# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
586# to gcc where it needs the '-Wl,'.
442# 587#
443# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 588# If no flags are specified, then default to ${LDFLAGS}.
444gcc2-flags() { 589raw-ldflags() {
445 CFLAGS=${CFLAGS//pentium-mmx/i586} 590 local x input="$@"
446 CFLAGS=${CFLAGS//pentium[234]/i686} 591 [[ -z ${input} ]] && input=${LDFLAGS}
447 CFLAGS=${CFLAGS//k6-[23]/k6} 592 set --
448 CFLAGS=${CFLAGS//athlon-tbird/i686} 593 for x in ${input} ; do
449 CFLAGS=${CFLAGS//athlon-4/i686} 594 x=${x#-Wl,}
450 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 595 set -- "$@" ${x//,/ }
451 CFLAGS=${CFLAGS//athlon/i686} 596 done
597 echo "$@"
598}
452 599
453 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 600# @FUNCTION: no-as-needed
454 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 601# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
455 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 602no-as-needed() {
456 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 603 case $($(tc-getLD) -v 2>&1 </dev/null) in
457 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 604 *GNU*) # GNU ld
458 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 605 echo "-Wl,--no-as-needed" ;;
459 CXXFLAGS=${CXXFLAGS//athlon/i686} 606 esac
607}
460 608
461 if [[ $(tc-arch) == "alpha" ]] ; then
462 CHOST=${CHOST/#alphaev6[78]/alphaev6}
463 CFLAGS=${CFLAGS//ev6[78]/ev6}
464 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
465 fi 609fi
466
467 export CFLAGS CXXFLAGS
468}

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