/[gentoo-x86]/eclass/flag-o-matic.eclass
Gentoo

Diff of /eclass/flag-o-matic.eclass

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 1.3 Revision 1.47
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 1.47 2004/04/12 02:33:29 swtaylor 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 if [ -z "${ALLOWED_FLAGS}" ] ; then
70 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
71 case "${ARCH}" in
72 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
73 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
74 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
75 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
76 esac
77 fi
18 78
79 # C[XX]FLAGS that we are think is ok, but needs testing
80 # NOTE: currently -Os have issues with gcc3 and K6* arch's
81 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
82 return 0
83}
84
19filter-flags () { 85filter-flags() {
20
21 for x in $1; do 86 for x in "$@" ; do
87 case "${x}" in
88 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
89 -fstack-protector|-fstack-protector-all) fstack-flags;;
90 *) ;;
91 esac
92 done
93
94 # we do this fancy spacing stuff so as to not filter
95 # out part of a flag ... we want flag atoms ! :D
96 CFLAGS=" ${CFLAGS} "
97 CXXFLAGS=" ${CXXFLAGS} "
98 for x in "$@" ; do
22 CFLAGS="${CFLAGS/$x}" 99 CFLAGS="${CFLAGS// ${x} / }"
23 CXXFLAGS="${CXXFLAGS/$x}" 100 CXXFLAGS="${CXXFLAGS// ${x} / }"
24 done 101 done
25 102 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
103 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
104 return 0
26} 105}
27 106
107filter-lfs-flags() {
108 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
109}
110
28append-flags () { 111append-flags() {
112 export CFLAGS="${CFLAGS} $@"
113 export CXXFLAGS="${CXXFLAGS} $@"
114 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
115 return 0
116}
29 117
30 118replace-flags() {
119 # we do this fancy spacing stuff so as to not filter
120 # out part of a flag ... we want flag atoms ! :D
31 CFLAGS="$CFLAGS $1" 121 CFLAGS=" ${CFLAGS} "
32 CXXFLAGS="$CXXFLAGS $1" 122 CXXFLAGS=" ${CXXFLAGS} "
33
34}
35
36change-flags () {
37
38 CFLAGS="${CFLAGS/${1}/${2}" 123 CFLAGS="${CFLAGS// ${1} / ${2} }"
39 CXXFLAGS="${CXXFLAGS/${1}/${2}" 124 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
40 125 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
126 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
127 return 0
41} 128}
129
130replace-cpu-flags() {
131 local newcpu="$1" ; shift
132 local oldcpu=""
133 for oldcpu in "$@" ; do
134 replace-flags -march=${oldcpu} -march=${newcpu}
135 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
136 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
137 done
138 return 0
139}
140
141is-flag() {
142 for x in ${CFLAGS} ${CXXFLAGS} ; do
143 if [ "${x}" == "$1" ] ; then
144 echo true
145 return 0
146 fi
147 done
148 return 1
149}
150
151filter-mfpmath() {
152 # save the original -mfpmath flag
153 local orig_mfpmath="`get-flag -mfpmath`"
154 # get the value of the current -mfpmath flag
155 local new_math=" `get-flag mfpmath | tr , ' '` "
156 # figure out which math values are to be removed
157 local prune_math=""
158 for prune_math in "$@" ; do
159 new_math="${new_math/ ${prune_math} / }"
160 done
161 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
162
163 if [ -z "${new_math}" ] ; then
164 # if we're removing all user specified math values are
165 # slated for removal, then we just filter the flag
166 filter-flags ${orig_mfpmath}
167 else
168 # if we only want to filter some of the user specified
169 # math values, then we replace the current flag
170 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
171 fi
172 return 0
173}
174
175strip-flags() {
176 setup-allowed-flags
177
178 local NEW_CFLAGS=""
179 local NEW_CXXFLAGS=""
180
181 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
182 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
183 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
184 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
185 fi
186
187 set -f
188
189 for x in ${CFLAGS}
190 do
191 for y in ${ALLOWED_FLAGS}
192 do
193 flag=${x%%=*}
194 if [ "${flag%%${y}}" = "" ]
195 then
196 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
197 break
198 fi
199 done
200 done
201
202 for x in ${CXXFLAGS}
203 do
204 for y in ${ALLOWED_FLAGS}
205 do
206 flag=${x%%=*}
207 if [ "${flag%%${y}}" = "" ]
208 then
209 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
210 break
211 fi
212 done
213 done
214
215 # In case we filtered out all optimization flags fallback to -O2
216 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
217 NEW_CFLAGS="${NEW_CFLAGS} -O2"
218 fi
219 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
220 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
221 fi
222
223 set +f
224
225 [ `use debug` ] \
226 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
227 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
228
229 export CFLAGS="${NEW_CFLAGS}"
230 export CXXFLAGS="${NEW_CXXFLAGS}"
231 return 0
232}
233
234test_flag() {
235 if [ -z "`gcc -S -xc "$@" -o /dev/null /dev/null 2>&1`" ]; then
236 echo "$@"
237 return 0
238 fi
239 return 1
240}
241
242strip-unsupported-flags() {
243 for x in ${CFLAGS} ; do
244 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
245 done
246 for x in ${CXXFLAGS} ; do
247 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
248 done
249
250 export CFLAGS="${NEW_CFLAGS}"
251 export CXXFLAGS="${NEW_CXXFLAGS}"
252}
253
254get-flag() {
255 # this code looks a little flaky but seems to work for
256 # everything we want ...
257 # for example, if CFLAGS="-march=i686":
258 # `get-flags -march` == "-march=i686"
259 # `get-flags march` == "i686"
260 local findflag="$1"
261 for f in ${CFLAGS} ${CXXFLAGS} ; do
262 if [ "${f/${findflag}}" != "${f}" ] ; then
263 echo "${f/-${findflag}=}"
264 return 0
265 fi
266 done
267 return 1
268}
269
270has_pic() {
271 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
272 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
273 has_version sys-devel/hardened-gcc && return 0
274 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
275 return 1
276}
277
278has_pie() {
279 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
280 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
281 has_version sys-devel/hardened-gcc && return 0
282 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
283 return 1
284}
285
286has_ssp() {
287 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
288 has_version sys-devel/hardened-gcc && return 0
289 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
290 return 1
291}
292
293replace-sparc64-flags() {
294 local SPARC64_CPUS="ultrasparc v9"
295
296 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
297 then
298 for x in ${SPARC64_CPUS}
299 do
300 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
301 done
302 else
303 for x in ${SPARC64_CPUS}
304 do
305 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
306 done
307 fi
308
309 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
310 then
311 for x in ${SPARC64_CPUS}
312 do
313 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
314 done
315 else
316 for x in ${SPARC64_CPUS}
317 do
318 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
319 done
320 fi
321}
322
323append-ldflags() {
324 LDFLAGS="${LDFLAGS} $@"
325 return 0
326}
327
328filter-ldflags() {
329 # we do this fancy spacing stuff so as to not filter
330 # out part of a flag ... we want flag atoms ! :D
331 LDFLAGS=" ${LDFLAGS} "
332 for x in "$@" ; do
333 LDFLAGS="${LDFLAGS// ${x} / }"
334 done
335 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
336 return 0
337}
338
339etexec-flags() {
340 has_pie || has_pic
341 if [ $? == 0 ] ; then
342 [ -z "`is-flag -yet_exec`" ] &&
343 export CFLAGS="${CFLAGS} `test_flag -yet_exec`"
344 [ -z "`is-flag -nopie`" ] &&
345 export CFLAGS="${CFLAGS} `test_flag -nopie`"
346 fi
347}
348
349fstack-flags() {
350 has_ssp
351 if [ $? == 0 ] ; then
352 [ -z "`is-flag -yno_propolice`" ] &&
353 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
354 fi
355}

Legend:
Removed from v.1.3  
changed lines
  Added in v.1.47

  ViewVC Help
Powered by ViewVC 1.1.20