/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.3 Revision 1.41
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 1.41 2004/03/16 21:37:09 solar 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
8INHERITED="$INHERITED $ECLASS"
6 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#### change-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#### filter-ldflags <flags> ####
53# Remove particular flags from LDFLAGS
54# Matches only complete flags
55#
56#### etexec-flags ####
57# hooked function for hardened-gcc that appends
58# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
59# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
60#
61#### fstack-flags ####
62# hooked function for hardened-gcc that appends
63# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
64# and a package is filtering -fstack-protector, -fstack-protector-all
65#
17 66
67# C[XX]FLAGS that we allow in strip-flags
68setup-allowed-flags() {
69 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
70 case "${ARCH}" in
71 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
72 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
73 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
74 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
75 esac
18 76
77 # C[XX]FLAGS that we are think is ok, but needs testing
78 # NOTE: currently -Os have issues with gcc3 and K6* arch's
79 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
80 return 0
81}
82
19filter-flags () { 83filter-flags() {
20
21 for x in $1; do 84 for x in "$@" ; do
85 case "${x}" in
86 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
87 -fstack-protector|-fstack-protector-all) fstack-flags;;
88 *) ;;
89 esac
90 done
91
92 # we do this fancy spacing stuff so as to not filter
93 # out part of a flag ... we want flag atoms ! :D
94 CFLAGS=" ${CFLAGS} "
95 CXXFLAGS=" ${CXXFLAGS} "
96 for x in "$@" ; do
22 CFLAGS="${CFLAGS/$x}" 97 CFLAGS="${CFLAGS// ${x} / }"
23 CXXFLAGS="${CXXFLAGS/$x}" 98 CXXFLAGS="${CXXFLAGS// ${x} / }"
24 done 99 done
25 100 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
101 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
102 return 0
26} 103}
27 104
105filter-lfs-flags() {
106 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
107}
108
28append-flags () { 109append-flags() {
110 export CFLAGS="${CFLAGS} $@"
111 export CXXFLAGS="${CXXFLAGS} $@"
112 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
113 return 0
114}
29 115
30 116replace-flags() {
117 # we do this fancy spacing stuff so as to not filter
118 # out part of a flag ... we want flag atoms ! :D
31 CFLAGS="$CFLAGS $1" 119 CFLAGS=" ${CFLAGS} "
32 CXXFLAGS="$CXXFLAGS $1" 120 CXXFLAGS=" ${CXXFLAGS} "
33
34}
35
36change-flags () {
37
38 CFLAGS="${CFLAGS/${1}/${2}" 121 CFLAGS="${CFLAGS// ${1} / ${2} }"
39 CXXFLAGS="${CXXFLAGS/${1}/${2}" 122 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
40 123 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
124 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
125 return 0
41} 126}
127
128replace-cpu-flags() {
129 local newcpu="$1" ; shift
130 local oldcpu=""
131 for oldcpu in "$@" ; do
132 replace-flags -march=${oldcpu} -march=${newcpu}
133 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
134 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
135 done
136 return 0
137}
138
139is-flag() {
140 for x in ${CFLAGS} ${CXXFLAGS} ; do
141 if [ "${x}" == "$1" ] ; then
142 echo true
143 return 0
144 fi
145 done
146 return 1
147}
148
149filter-mfpmath() {
150 # save the original -mfpmath flag
151 local orig_mfpmath="`get-flag -mfpmath`"
152 # get the value of the current -mfpmath flag
153 local new_math=" `get-flag mfpmath | tr , ' '` "
154 # figure out which math values are to be removed
155 local prune_math=""
156 for prune_math in "$@" ; do
157 new_math="${new_math/ ${prune_math} / }"
158 done
159 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
160
161 if [ -z "${new_math}" ] ; then
162 # if we're removing all user specified math values are
163 # slated for removal, then we just filter the flag
164 filter-flags ${orig_mfpmath}
165 else
166 # if we only want to filter some of the user specified
167 # math values, then we replace the current flag
168 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
169 fi
170 return 0
171}
172
173strip-flags() {
174 setup-allowed-flags
175
176 local NEW_CFLAGS=""
177 local NEW_CXXFLAGS=""
178
179 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
180 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
181 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
182 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
183 fi
184
185 set -f
186
187 for x in ${CFLAGS}
188 do
189 for y in ${ALLOWED_FLAGS}
190 do
191 flag=${x%%=*}
192 if [ "${flag%%${y}}" = "" ]
193 then
194 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
195 break
196 fi
197 done
198 done
199
200 for x in ${CXXFLAGS}
201 do
202 for y in ${ALLOWED_FLAGS}
203 do
204 flag=${x%%=*}
205 if [ "${flag%%${y}}" = "" ]
206 then
207 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
208 break
209 fi
210 done
211 done
212
213 # In case we filtered out all optimization flags fallback to -O2
214 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
215 NEW_CFLAGS="${NEW_CFLAGS} -O2"
216 fi
217 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
218 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
219 fi
220
221 set +f
222
223 [ `use debug` ] \
224 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
225 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
226
227 export CFLAGS="${NEW_CFLAGS}"
228 export CXXFLAGS="${NEW_CXXFLAGS}"
229 return 0
230}
231
232test_flag() {
233 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then
234 echo "$@"
235 return 0
236 fi
237 return 1
238}
239
240strip-unsupported-flags() {
241 for x in ${CFLAGS} ; do
242 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
243 done
244 for x in ${CXXFLAGS} ; do
245 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
246 done
247
248 export CFLAGS="${NEW_CFLAGS}"
249 export CXXFLAGS="${NEW_CXXFLAGS}"
250}
251
252get-flag() {
253 # this code looks a little flaky but seems to work for
254 # everything we want ...
255 # for example, if CFLAGS="-march=i686":
256 # `get-flags -march` == "-march=i686"
257 # `get-flags march` == "i686"
258 local findflag="$1"
259 for f in ${CFLAGS} ${CXXFLAGS} ; do
260 if [ "${f/${findflag}}" != "${f}" ] ; then
261 echo "${f/-${findflag}=}"
262 return 0
263 fi
264 done
265 return 1
266}
267
268replace-sparc64-flags() {
269 local SPARC64_CPUS="ultrasparc v9"
270
271 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
272 then
273 for x in ${SPARC64_CPUS}
274 do
275 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
276 done
277 else
278 for x in ${SPARC64_CPUS}
279 do
280 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
281 done
282 fi
283
284 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
285 then
286 for x in ${SPARC64_CPUS}
287 do
288 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
289 done
290 else
291 for x in ${SPARC64_CPUS}
292 do
293 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
294 done
295 fi
296}
297
298append-ldflags() {
299 LDFLAGS="${LDFLAGS} $@"
300 return 0
301}
302
303filter-ldflags() {
304 # we do this fancy spacing stuff so as to not filter
305 # out part of a flag ... we want flag atoms ! :D
306 LDFLAGS=" ${LDFLAGS} "
307 for x in "$@" ; do
308 LDFLAGS="${LDFLAGS// ${x} / }"
309 done
310 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
311 return 0
312}
313
314etexec-flags() {
315 has_version sys-devel/hardened-gcc
316 if [ $? == 0 ] ; then
317 if [ "`is-flag -yet_exec`" != "true" ]; then
318 debug-print ">>> appending flags -yet_exec"
319 append-flags -yet_exec
320 append-ldflags -yet_exec
321 fi
322 fi
323}
324
325fstack-flags() {
326 has_version sys-devel/hardened-gcc
327 if [ $? == 0 ] ; then
328 if [ "`is-flag -yno_propolice`" != "true" ]; then
329 debug-print ">>> appending flags -yno_propolice"
330 append-flags -yno_propolice
331 append-ldflags -yno_propolice
332 fi
333 fi
334}

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