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Revision 1.42 - (hide annotations) (download)
Tue Apr 6 03:45:00 2004 UTC (10 years, 4 months ago) by tseng
Branch: MAIN
Changes since 1.41: +38 -9 lines
update flag-o-matic.eclass with has_{pic,pie,ssp}, hardened@gentoo.org

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 tseng 1.42 # $Header: /home/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.41 2004/03/16 21:37:09 solar 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 solar 1.41 #### filter-ldflags <flags> ####
53     # Remove particular flags from LDFLAGS
54     # Matches only complete flags
55     #
56 solar 1.27 #### etexec-flags ####
57     # hooked function for hardened-gcc that appends
58     # -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
59 solar 1.32 # and a package is filtering -fPIC,-fpic, -fPIE, -fpie
60 solar 1.27 #
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 solar 1.32 # and a package is filtering -fstack-protector, -fstack-protector-all
65 solar 1.27 #
66 verwilst 1.3
67 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
68 vapier 1.36 setup-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
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 aliz 1.24 }
82 verwilst 1.13
83 vapier 1.18 filter-flags() {
84 vapier 1.36 for x in "$@" ; do
85 solar 1.27 case "${x}" in
86 solar 1.39 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
87 solar 1.32 -fstack-protector|-fstack-protector-all) fstack-flags;;
88 solar 1.27 *) ;;
89     esac
90     done
91 vapier 1.36
92 vapier 1.18 # we do this fancy spacing stuff so as to not filter
93     # out part of a flag ... we want flag atoms ! :D
94 agriffis 1.25 CFLAGS=" ${CFLAGS} "
95     CXXFLAGS=" ${CXXFLAGS} "
96 vapier 1.36 for x in "$@" ; do
97 vapier 1.37 CFLAGS="${CFLAGS// ${x} / }"
98     CXXFLAGS="${CXXFLAGS// ${x} / }"
99 verwilst 1.1 done
100 agriffis 1.25 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
101     CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
102 vapier 1.36 return 0
103 verwilst 1.2 }
104    
105 vapier 1.40 filter-lfs-flags() {
106     filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
107     }
108    
109 vapier 1.18 append-flags() {
110 vapier 1.36 export CFLAGS="${CFLAGS} $@"
111     export CXXFLAGS="${CXXFLAGS} $@"
112 vapier 1.33 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
113 vapier 1.28 return 0
114 verwilst 1.1 }
115    
116 vapier 1.18 replace-flags() {
117 vapier 1.36 # we do this fancy spacing stuff so as to not filter
118     # out part of a flag ... we want flag atoms ! :D
119     CFLAGS=" ${CFLAGS} "
120     CXXFLAGS=" ${CXXFLAGS} "
121 vapier 1.37 CFLAGS="${CFLAGS// ${1} / ${2} }"
122     CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
123 vapier 1.36 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
124     CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
125 vapier 1.28 return 0
126 danarmak 1.7 }
127    
128 vapier 1.37 replace-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 vapier 1.38 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
135 vapier 1.37 done
136     return 0
137     }
138    
139 danarmak 1.7 is-flag() {
140 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
141     if [ "${x}" == "$1" ] ; then
142 azarah 1.8 echo true
143 vapier 1.18 return 0
144     fi
145 danarmak 1.7 done
146 vapier 1.18 return 1
147 verwilst 1.1 }
148 azarah 1.8
149 vapier 1.36 filter-mfpmath() {
150     # save the original -mfpmath flag
151     local orig_mfpmath="`get-flag -mfpmath`"
152     # get the value of the current -mfpmath flag
153     local new_math=" `get-flag mfpmath | tr , ' '` "
154     # figure out which math values are to be removed
155     local prune_math=""
156     for prune_math in "$@" ; 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    
173 azarah 1.8 strip-flags() {
174 vapier 1.36 setup-allowed-flags
175    
176 azarah 1.8 local NEW_CFLAGS=""
177     local NEW_CXXFLAGS=""
178    
179 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
180 vapier 1.20 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
181     [ `use debug` ] && einfo "Enabling the use of some unstable flags"
182 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
183     fi
184    
185 azarah 1.8 set -f
186    
187     for x in ${CFLAGS}
188     do
189     for y in ${ALLOWED_FLAGS}
190     do
191 lostlogic 1.14 flag=${x%%=*}
192     if [ "${flag%%${y}}" = "" ]
193 azarah 1.8 then
194 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
195     break
196 azarah 1.8 fi
197     done
198     done
199    
200     for x in ${CXXFLAGS}
201     do
202     for y in ${ALLOWED_FLAGS}
203     do
204 lostlogic 1.14 flag=${x%%=*}
205     if [ "${flag%%${y}}" = "" ]
206 azarah 1.8 then
207 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
208     break
209 azarah 1.8 fi
210     done
211     done
212 azarah 1.30
213     # In case we filtered out all optimization flags fallback to -O2
214     if [ "${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="${NEW_CXXFLAGS} -O2"
219     fi
220 azarah 1.8
221     set +f
222    
223 vapier 1.20 [ `use debug` ] \
224     && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
225     && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
226    
227 azarah 1.8 export CFLAGS="${NEW_CFLAGS}"
228     export CXXFLAGS="${NEW_CXXFLAGS}"
229 vapier 1.36 return 0
230 puggy 1.29 }
231    
232 vapier 1.36 test_flag() {
233     if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then
234     echo "$@"
235     return 0
236 puggy 1.29 fi
237 vapier 1.36 return 1
238 puggy 1.29 }
239    
240     strip-unsupported-flags() {
241 vapier 1.36 for x in ${CFLAGS} ; do
242 puggy 1.29 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
243     done
244 vapier 1.36 for x in ${CXXFLAGS} ; do
245 puggy 1.29 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
246     done
247    
248 vapier 1.36 export CFLAGS="${NEW_CFLAGS}"
249     export CXXFLAGS="${NEW_CXXFLAGS}"
250 azarah 1.8 }
251    
252 vapier 1.10 get-flag() {
253 vapier 1.36 # 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 vapier 1.10 local findflag="$1"
259     for f in ${CFLAGS} ${CXXFLAGS} ; do
260     if [ "${f/${findflag}}" != "${f}" ] ; then
261     echo "${f/-${findflag}=}"
262 vapier 1.28 return 0
263 vapier 1.10 fi
264     done
265 vapier 1.28 return 1
266 joker 1.16 }
267    
268 tseng 1.42 has_pic() {
269     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
270     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
271     [ has_version sys-devel/hardened-gcc ] && return 0
272     [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
273     return 1
274     }
275    
276     has_pie() {
277     [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
278     [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
279     [ has_version sys-devel/hardened-gcc ] && return 0
280     [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
281     return 1
282     }
283    
284     has_ssp() {
285     [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
286     [ has_version sys-devel/hardened-gcc ] && return 0
287     [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
288     return 1
289     }
290    
291 vapier 1.18 replace-sparc64-flags() {
292 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
293    
294     if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
295     then
296     for x in ${SPARC64_CPUS}
297     do
298     CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
299     done
300     else
301     for x in ${SPARC64_CPUS}
302     do
303     CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
304     done
305     fi
306    
307     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
308     then
309     for x in ${SPARC64_CPUS}
310     do
311     CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
312     done
313     else
314     for x in ${SPARC64_CPUS}
315     do
316     CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
317     done
318     fi
319 solar 1.27 }
320    
321     append-ldflags() {
322     LDFLAGS="${LDFLAGS} $@"
323 vapier 1.28 return 0
324 solar 1.27 }
325    
326 solar 1.41 filter-ldflags() {
327     # we do this fancy spacing stuff so as to not filter
328     # out part of a flag ... we want flag atoms ! :D
329     LDFLAGS=" ${LDFLAGS} "
330     for x in "$@" ; do
331     LDFLAGS="${LDFLAGS// ${x} / }"
332     done
333     LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
334     return 0
335     }
336    
337 vapier 1.36 etexec-flags() {
338 tseng 1.42 has_pie || has_pic
339 vapier 1.36 if [ $? == 0 ] ; then
340 tseng 1.42 # strip -fPIC regardless if you've gotten this far
341     strip-flags -fPIC -fpic -fPIE -fpie -pie
342 solar 1.35 if [ "`is-flag -yet_exec`" != "true" ]; then
343 tseng 1.42 # If our compile support -yet_exec, append it now
344     [ -z "`gcc -yet_exec -S -o /dev/null -xc /dev/null 2>&1`" ] \
345     && ( debug-print ">>> appending flags -yet_exec" ; \
346     append-flags -yet_exec ; append-ldflags -yet_exec )
347 solar 1.34 fi
348 solar 1.35 fi
349 solar 1.27 }
350    
351     fstack-flags() {
352 tseng 1.42 has_ssp
353 vapier 1.36 if [ $? == 0 ] ; then
354 tseng 1.42 # strip -fstack-protector regardless if you've gotten this far
355     strip-flags -fstack-protector -fstack-protector-all
356 solar 1.35 if [ "`is-flag -yno_propolice`" != "true" ]; then
357 tseng 1.42 # If our compile support -yno_propolice, append it now
358     [ -z "`gcc -yno_propolice -S -o /dev/null -xc /dev/null 2>&1`" ] \
359     && ( debug-print ">>> appending flags -yno_propolice" ; \
360     append-flags -yno_propolice ; append-ldflags -yno_propolice )
361 solar 1.34 fi
362 solar 1.35 fi
363 vapier 1.10 }

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