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Revision 1.37 - (hide annotations) (download)
Sat Feb 21 07:19:29 2004 UTC (10 years, 8 months ago) by vapier
Branch: MAIN
Changes since 1.36: +19 -5 lines
add replace-cpu-flags to help tone down march/mcpu flags
make sure filter-flags/replace-flags catch multiple copies of a flag (for example, if user has -msse -msse -msse and we try to `filter-flags -msse`, we would catch only the first one before)

1 vapier 1.12 # Copyright 1999-2003 Gentoo Technologies, Inc.
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 vapier 1.37 # $Header: /home/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.36 2004/02/21 07:07:56 vapier Exp $
4 vapier 1.12 #
5 verwilst 1.1 # Author Bart Verwilst <verwilst@gentoo.org>
6 azarah 1.8
7 verwilst 1.1 ECLASS=flag-o-matic
8 danarmak 1.6 INHERITED="$INHERITED $ECLASS"
9 azarah 1.8
10 verwilst 1.2 #
11 vapier 1.18 #### filter-flags <flags> ####
12 verwilst 1.3 # Remove particular flags from C[XX]FLAGS
13 vapier 1.18 # Matches only complete flags
14 verwilst 1.2 #
15 vapier 1.18 #### append-flags <flags> ####
16 verwilst 1.3 # Add extra flags to your current C[XX]FLAGS
17     #
18 verwilst 1.4 #### replace-flags <orig.flag> <new.flag> ###
19 verwilst 1.3 # Replace a flag by another one
20     #
21 vapier 1.37 #### 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 danarmak 1.7 #### is-flag <flag> ####
26     # Returns "true" if flag is set in C[XX]FLAGS
27 vapier 1.18 # Matches only complete a flag
28 danarmak 1.7 #
29 azarah 1.8 #### strip-flags ####
30     # Strip C[XX]FLAGS of everything except known
31     # good options.
32     #
33 puggy 1.29 #### strip-unsupported-flags ####
34     # Strip C[XX]FLAGS of any flags not supported by
35     # installed version of gcc
36     #
37 vapier 1.10 #### get-flag <flag> ####
38     # Find and echo the value for a particular flag
39     #
40 joker 1.16 #### replace-sparc64-flags ####
41     # Sets mcpu to v8 and uses the original value
42     # as mtune if none specified.
43     #
44 vapier 1.26 #### 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 solar 1.27 #
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 solar 1.32 # and a package is filtering -fPIC,-fpic, -fPIE, -fpie
56 solar 1.27 #
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 solar 1.32 # and a package is filtering -fstack-protector, -fstack-protector-all
61 solar 1.27 #
62 verwilst 1.3
63 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
64 vapier 1.36 setup-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
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 aliz 1.24 }
78 verwilst 1.13
79 vapier 1.18 filter-flags() {
80 vapier 1.36 for x in "$@" ; do
81 solar 1.27 case "${x}" in
82 solar 1.32 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;;
83     -fstack-protector|-fstack-protector-all) fstack-flags;;
84 solar 1.27 *) ;;
85     esac
86     done
87 vapier 1.36
88 vapier 1.18 # we do this fancy spacing stuff so as to not filter
89     # out part of a flag ... we want flag atoms ! :D
90 agriffis 1.25 CFLAGS=" ${CFLAGS} "
91     CXXFLAGS=" ${CXXFLAGS} "
92 vapier 1.36 for x in "$@" ; do
93 vapier 1.37 CFLAGS="${CFLAGS// ${x} / }"
94     CXXFLAGS="${CXXFLAGS// ${x} / }"
95 verwilst 1.1 done
96 agriffis 1.25 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
97     CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
98 vapier 1.36 return 0
99 verwilst 1.2 }
100    
101 vapier 1.18 append-flags() {
102 vapier 1.36 export CFLAGS="${CFLAGS} $@"
103     export CXXFLAGS="${CXXFLAGS} $@"
104 vapier 1.33 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
105 vapier 1.28 return 0
106 verwilst 1.1 }
107    
108 vapier 1.18 replace-flags() {
109 vapier 1.36 # we do this fancy spacing stuff so as to not filter
110     # out part of a flag ... we want flag atoms ! :D
111     CFLAGS=" ${CFLAGS} "
112     CXXFLAGS=" ${CXXFLAGS} "
113 vapier 1.37 CFLAGS="${CFLAGS// ${1} / ${2} }"
114     CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
115 vapier 1.36 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
116     CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
117 vapier 1.28 return 0
118 danarmak 1.7 }
119    
120 vapier 1.37 replace-cpu-flags() {
121     local newcpu="$1" ; shift
122     local oldcpu=""
123     for oldcpu in "$@" ; do
124     replace-flags -march=${oldcpu} -march=${newcpu}
125     replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
126     done
127     return 0
128     }
129    
130 danarmak 1.7 is-flag() {
131 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
132     if [ "${x}" == "$1" ] ; then
133 azarah 1.8 echo true
134 vapier 1.18 return 0
135     fi
136 danarmak 1.7 done
137 vapier 1.18 return 1
138 verwilst 1.1 }
139 azarah 1.8
140 vapier 1.36 filter-mfpmath() {
141     # save the original -mfpmath flag
142     local orig_mfpmath="`get-flag -mfpmath`"
143     # get the value of the current -mfpmath flag
144     local new_math=" `get-flag mfpmath | tr , ' '` "
145     # figure out which math values are to be removed
146     local prune_math=""
147     for prune_math in "$@" ; do
148     new_math="${new_math/ ${prune_math} / }"
149     done
150     new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
151    
152     if [ -z "${new_math}" ] ; then
153     # if we're removing all user specified math values are
154     # slated for removal, then we just filter the flag
155     filter-flags ${orig_mfpmath}
156     else
157     # if we only want to filter some of the user specified
158     # math values, then we replace the current flag
159     replace-flags ${orig_mfpmath} -mfpmath=${new_math}
160     fi
161     return 0
162     }
163    
164 azarah 1.8 strip-flags() {
165 vapier 1.36 setup-allowed-flags
166    
167 azarah 1.8 local NEW_CFLAGS=""
168     local NEW_CXXFLAGS=""
169    
170 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
171 vapier 1.20 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
172     [ `use debug` ] && einfo "Enabling the use of some unstable flags"
173 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
174     fi
175    
176 azarah 1.8 set -f
177    
178     for x in ${CFLAGS}
179     do
180     for y in ${ALLOWED_FLAGS}
181     do
182 lostlogic 1.14 flag=${x%%=*}
183     if [ "${flag%%${y}}" = "" ]
184 azarah 1.8 then
185 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
186     break
187 azarah 1.8 fi
188     done
189     done
190    
191     for x in ${CXXFLAGS}
192     do
193     for y in ${ALLOWED_FLAGS}
194     do
195 lostlogic 1.14 flag=${x%%=*}
196     if [ "${flag%%${y}}" = "" ]
197 azarah 1.8 then
198 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
199     break
200 azarah 1.8 fi
201     done
202     done
203 azarah 1.30
204     # In case we filtered out all optimization flags fallback to -O2
205     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
206     NEW_CFLAGS="${NEW_CFLAGS} -O2"
207     fi
208     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
209     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
210     fi
211 azarah 1.8
212     set +f
213    
214 vapier 1.20 [ `use debug` ] \
215     && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
216     && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
217    
218 azarah 1.8 export CFLAGS="${NEW_CFLAGS}"
219     export CXXFLAGS="${NEW_CXXFLAGS}"
220 vapier 1.36 return 0
221 puggy 1.29 }
222    
223 vapier 1.36 test_flag() {
224     if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then
225     echo "$@"
226     return 0
227 puggy 1.29 fi
228 vapier 1.36 return 1
229 puggy 1.29 }
230    
231     strip-unsupported-flags() {
232 vapier 1.36 for x in ${CFLAGS} ; do
233 puggy 1.29 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
234     done
235 vapier 1.36 for x in ${CXXFLAGS} ; do
236 puggy 1.29 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
237     done
238    
239 vapier 1.36 export CFLAGS="${NEW_CFLAGS}"
240     export CXXFLAGS="${NEW_CXXFLAGS}"
241 azarah 1.8 }
242    
243 vapier 1.10 get-flag() {
244 vapier 1.36 # this code looks a little flaky but seems to work for
245     # everything we want ...
246     # for example, if CFLAGS="-march=i686":
247     # `get-flags -march` == "-march=i686"
248     # `get-flags march` == "i686"
249 vapier 1.10 local findflag="$1"
250     for f in ${CFLAGS} ${CXXFLAGS} ; do
251     if [ "${f/${findflag}}" != "${f}" ] ; then
252     echo "${f/-${findflag}=}"
253 vapier 1.28 return 0
254 vapier 1.10 fi
255     done
256 vapier 1.28 return 1
257 joker 1.16 }
258    
259 vapier 1.18 replace-sparc64-flags() {
260 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
261    
262     if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
263     then
264     for x in ${SPARC64_CPUS}
265     do
266     CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
267     done
268     else
269     for x in ${SPARC64_CPUS}
270     do
271     CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
272     done
273     fi
274    
275     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
276     then
277     for x in ${SPARC64_CPUS}
278     do
279     CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
280     done
281     else
282     for x in ${SPARC64_CPUS}
283     do
284     CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
285     done
286     fi
287 solar 1.27 }
288    
289     append-ldflags() {
290     LDFLAGS="${LDFLAGS} $@"
291 vapier 1.28 return 0
292 solar 1.27 }
293    
294 vapier 1.36 etexec-flags() {
295 solar 1.35 has_version sys-devel/hardened-gcc
296 vapier 1.36 if [ $? == 0 ] ; then
297 solar 1.35 if [ "`is-flag -yet_exec`" != "true" ]; then
298 vapier 1.36 debug-print ">>> appending flags -yet_exec"
299 solar 1.34 append-flags -yet_exec
300     append-ldflags -yet_exec
301     fi
302 solar 1.35 fi
303 solar 1.27 }
304    
305     fstack-flags() {
306 solar 1.35 has_version sys-devel/hardened-gcc
307 vapier 1.36 if [ $? == 0 ] ; then
308 solar 1.35 if [ "`is-flag -yno_propolice`" != "true" ]; then
309 solar 1.34 debug-print ">>> appending flags -yno_propolice"
310     append-flags -yno_propolice
311     append-ldflags -yno_propolice
312     fi
313 solar 1.35 fi
314 vapier 1.10 }

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