/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.6 Revision 1.40
1# Copyright 1999-2002 Gentoo Technologies, Inc. 1# Copyright 1999-2003 Gentoo Technologies, Inc.
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 1.40 2004/03/12 11:21:15 vapier Exp $
4#
3# Author Bart Verwilst <verwilst@gentoo.org> 5# Author Bart Verwilst <verwilst@gentoo.org>
4# /space/gentoo/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass 6
5ECLASS=flag-o-matic 7ECLASS=flag-o-matic
6INHERITED="$INHERITED $ECLASS" 8INHERITED="$INHERITED $ECLASS"
9
7# 10#
8#### filter-flags <flag> #### 11#### filter-flags <flags> ####
9# Remove particular flags from C[XX]FLAGS 12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
10# 14#
11#### append-flags <flag> #### 15#### append-flags <flags> ####
12# Add extra flags to your current C[XX]FLAGS 16# Add extra flags to your current C[XX]FLAGS
13# 17#
14#### replace-flags <orig.flag> <new.flag> ### 18#### replace-flags <orig.flag> <new.flag> ###
15# Replace a flag by another one 19# Replace a flag by another one
16# 20#
21#### replace-cpu-flags <new.cpu> <old.cpus> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28#
29#### strip-flags ####
30# Strip C[XX]FLAGS of everything except known
31# good options.
32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
37#### get-flag <flag> ####
38# Find and echo the value for a particular flag
39#
40#### replace-sparc64-flags ####
41# Sets mcpu to v8 and uses the original value
42# as mtune if none specified.
43#
44#### filter-mfpmath <math types> ####
45# Remove specified math types from the fpmath specification
46# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
47# will leave the user with -mfpmath=386
48#
49#### append-ldflags ####
50# Add extra flags to your current LDFLAGS
51#
52#### etexec-flags ####
53# hooked function for hardened-gcc that appends
54# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
55# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
56#
57#### fstack-flags ####
58# hooked function for hardened-gcc that appends
59# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
60# and a package is filtering -fstack-protector, -fstack-protector-all
61#
17 62
63# C[XX]FLAGS that we allow in strip-flags
64setup-allowed-flags() {
65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
66 case "${ARCH}" in
67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
71 esac
18 72
73 # C[XX]FLAGS that we are think is ok, but needs testing
74 # NOTE: currently -Os have issues with gcc3 and K6* arch's
75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
76 return 0
77}
78
19filter-flags () { 79filter-flags() {
20
21 for x in $1; do 80 for x in "$@" ; do
81 case "${x}" in
82 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
83 -fstack-protector|-fstack-protector-all) fstack-flags;;
84 *) ;;
85 esac
86 done
87
88 # we do this fancy spacing stuff so as to not filter
89 # out part of a flag ... we want flag atoms ! :D
90 CFLAGS=" ${CFLAGS} "
91 CXXFLAGS=" ${CXXFLAGS} "
92 for x in "$@" ; do
22 CFLAGS="${CFLAGS/$x}" 93 CFLAGS="${CFLAGS// ${x} / }"
23 CXXFLAGS="${CXXFLAGS/$x}" 94 CXXFLAGS="${CXXFLAGS// ${x} / }"
24 done 95 done
25 96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
98 return 0
26} 99}
27 100
101filter-lfs-flags() {
102 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
103}
104
28append-flags () { 105append-flags() {
29
30
31 CFLAGS="$CFLAGS $1" 106 export CFLAGS="${CFLAGS} $@"
32 CXXFLAGS="$CXXFLAGS $1" 107 export CXXFLAGS="${CXXFLAGS} $@"
33 108 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
109 return 0
34} 110}
35 111
36replace-flags () { 112replace-flags() {
37 113 # we do this fancy spacing stuff so as to not filter
114 # out part of a flag ... we want flag atoms ! :D
115 CFLAGS=" ${CFLAGS} "
116 CXXFLAGS=" ${CXXFLAGS} "
38 CFLAGS="${CFLAGS/${1}/${2}}" 117 CFLAGS="${CFLAGS// ${1} / ${2} }"
39 CXXFLAGS="${CXXFLAGS/${1}/${2}}" 118 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
40 119 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
120 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
121 return 0
41} 122}
123
124replace-cpu-flags() {
125 local newcpu="$1" ; shift
126 local oldcpu=""
127 for oldcpu in "$@" ; do
128 replace-flags -march=${oldcpu} -march=${newcpu}
129 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
130 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
131 done
132 return 0
133}
134
135is-flag() {
136 for x in ${CFLAGS} ${CXXFLAGS} ; do
137 if [ "${x}" == "$1" ] ; then
138 echo true
139 return 0
140 fi
141 done
142 return 1
143}
144
145filter-mfpmath() {
146 # save the original -mfpmath flag
147 local orig_mfpmath="`get-flag -mfpmath`"
148 # get the value of the current -mfpmath flag
149 local new_math=" `get-flag mfpmath | tr , ' '` "
150 # figure out which math values are to be removed
151 local prune_math=""
152 for prune_math in "$@" ; do
153 new_math="${new_math/ ${prune_math} / }"
154 done
155 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
156
157 if [ -z "${new_math}" ] ; then
158 # if we're removing all user specified math values are
159 # slated for removal, then we just filter the flag
160 filter-flags ${orig_mfpmath}
161 else
162 # if we only want to filter some of the user specified
163 # math values, then we replace the current flag
164 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
165 fi
166 return 0
167}
168
169strip-flags() {
170 setup-allowed-flags
171
172 local NEW_CFLAGS=""
173 local NEW_CXXFLAGS=""
174
175 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
176 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
177 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
178 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
179 fi
180
181 set -f
182
183 for x in ${CFLAGS}
184 do
185 for y in ${ALLOWED_FLAGS}
186 do
187 flag=${x%%=*}
188 if [ "${flag%%${y}}" = "" ]
189 then
190 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
191 break
192 fi
193 done
194 done
195
196 for x in ${CXXFLAGS}
197 do
198 for y in ${ALLOWED_FLAGS}
199 do
200 flag=${x%%=*}
201 if [ "${flag%%${y}}" = "" ]
202 then
203 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
204 break
205 fi
206 done
207 done
208
209 # In case we filtered out all optimization flags fallback to -O2
210 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
211 NEW_CFLAGS="${NEW_CFLAGS} -O2"
212 fi
213 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
214 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
215 fi
216
217 set +f
218
219 [ `use debug` ] \
220 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
221 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
222
223 export CFLAGS="${NEW_CFLAGS}"
224 export CXXFLAGS="${NEW_CXXFLAGS}"
225 return 0
226}
227
228test_flag() {
229 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then
230 echo "$@"
231 return 0
232 fi
233 return 1
234}
235
236strip-unsupported-flags() {
237 for x in ${CFLAGS} ; do
238 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
239 done
240 for x in ${CXXFLAGS} ; do
241 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
242 done
243
244 export CFLAGS="${NEW_CFLAGS}"
245 export CXXFLAGS="${NEW_CXXFLAGS}"
246}
247
248get-flag() {
249 # this code looks a little flaky but seems to work for
250 # everything we want ...
251 # for example, if CFLAGS="-march=i686":
252 # `get-flags -march` == "-march=i686"
253 # `get-flags march` == "i686"
254 local findflag="$1"
255 for f in ${CFLAGS} ${CXXFLAGS} ; do
256 if [ "${f/${findflag}}" != "${f}" ] ; then
257 echo "${f/-${findflag}=}"
258 return 0
259 fi
260 done
261 return 1
262}
263
264replace-sparc64-flags() {
265 local SPARC64_CPUS="ultrasparc v9"
266
267 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
268 then
269 for x in ${SPARC64_CPUS}
270 do
271 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
272 done
273 else
274 for x in ${SPARC64_CPUS}
275 do
276 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
277 done
278 fi
279
280 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
281 then
282 for x in ${SPARC64_CPUS}
283 do
284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
285 done
286 else
287 for x in ${SPARC64_CPUS}
288 do
289 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
290 done
291 fi
292}
293
294append-ldflags() {
295 LDFLAGS="${LDFLAGS} $@"
296 return 0
297}
298
299etexec-flags() {
300 has_version sys-devel/hardened-gcc
301 if [ $? == 0 ] ; then
302 if [ "`is-flag -yet_exec`" != "true" ]; then
303 debug-print ">>> appending flags -yet_exec"
304 append-flags -yet_exec
305 append-ldflags -yet_exec
306 fi
307 fi
308}
309
310fstack-flags() {
311 has_version sys-devel/hardened-gcc
312 if [ $? == 0 ] ; then
313 if [ "`is-flag -yno_propolice`" != "true" ]; then
314 debug-print ">>> appending flags -yno_propolice"
315 append-flags -yno_propolice
316 append-ldflags -yno_propolice
317 fi
318 fi
319}

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