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Revision 1.32 - (hide annotations) (download)
Sun Dec 21 06:50:15 2003 UTC (10 years, 7 months ago) by solar
Branch: MAIN
Changes since 1.31: +6 -6 lines
added some more hoolks for PIC/fstack filtering

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 solar 1.32 # $Header: /home/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.31 2003/12/10 21:13:25 agriffis 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 danarmak 1.7 #### is-flag <flag> ####
22     # Returns "true" if flag is set in C[XX]FLAGS
23 vapier 1.18 # Matches only complete a flag
24 danarmak 1.7 #
25 azarah 1.8 #### strip-flags ####
26     # Strip C[XX]FLAGS of everything except known
27     # good options.
28     #
29 puggy 1.29 #### strip-unsupported-flags ####
30     # Strip C[XX]FLAGS of any flags not supported by
31     # installed version of gcc
32     #
33 vapier 1.10 #### get-flag <flag> ####
34     # Find and echo the value for a particular flag
35     #
36 joker 1.16 #### replace-sparc64-flags ####
37     # Sets mcpu to v8 and uses the original value
38     # as mtune if none specified.
39     #
40 vapier 1.26 #### filter-mfpmath <math types> ####
41     # Remove specified math types from the fpmath specification
42     # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
43     # will leave the user with -mfpmath=386
44 solar 1.27 #
45     #### append-ldflags ####
46     # Add extra flags to your current LDFLAGS
47     #
48     #### etexec-flags ####
49     # hooked function for hardened-gcc that appends
50     # -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
51 solar 1.32 # and a package is filtering -fPIC,-fpic, -fPIE, -fpie
52 solar 1.27 #
53     #### fstack-flags ####
54     # hooked function for hardened-gcc that appends
55     # -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
56 solar 1.32 # and a package is filtering -fstack-protector, -fstack-protector-all
57 solar 1.27 #
58 verwilst 1.3
59 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
60 vapier 1.22 ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
61     case "${ARCH}" in
62     mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
63 tester 1.23 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
64 agriffis 1.25 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
65 agriffis 1.31 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
66 vapier 1.22 esac
67 verwilst 1.13
68 azarah 1.17 # C[XX]FLAGS that we are think is ok, but needs testing
69     # NOTE: currently -Os have issues with gcc3 and K6* arch's
70     UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
71 aliz 1.24
72     filter-mfpmath() {
73     for a in $CFLAGS; do
74     if [ "${a:0:8}" == "-mfpmath" ]; then
75     orig_mfpmath=$a
76     fi
77     done
78    
79     mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
80     for b in $@; do
81     mfpmath="${mfpmath/$b}"
82     done
83    
84     if [ -z "${mfpmath/ }" ]; then
85     filter-flags "$orig_mfpmath"
86     else
87     new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
88     replace-flags "$orig_mfpmath" "$new_mfpmath"
89     fi
90     }
91 verwilst 1.13
92 vapier 1.18 filter-flags() {
93 solar 1.27 # we do two loops to avoid the first and last char from being chomped.
94     for x in $@ ; do
95     case "${x}" in
96 solar 1.32 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;;
97     -fstack-protector|-fstack-protector-all) fstack-flags;;
98 solar 1.27 *) ;;
99     esac
100     done
101 vapier 1.18 # we do this fancy spacing stuff so as to not filter
102     # out part of a flag ... we want flag atoms ! :D
103 agriffis 1.25 CFLAGS=" ${CFLAGS} "
104     CXXFLAGS=" ${CXXFLAGS} "
105 vapier 1.18 for x in $@ ; do
106 agriffis 1.25 CFLAGS="${CFLAGS/ ${x} / }"
107     CXXFLAGS="${CXXFLAGS/ ${x} / }"
108 verwilst 1.1 done
109 agriffis 1.25 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
110     CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
111 verwilst 1.2 }
112    
113 vapier 1.18 append-flags() {
114 vapier 1.19 CFLAGS="${CFLAGS} $@"
115     CXXFLAGS="${CXXFLAGS} $@"
116 solar 1.27 for x in $@; do
117 solar 1.32 [ "${x}" = "-fno-stack-protector" -o "${x}" = "-fno-stack-protector-all" ] && fstack-flags
118 solar 1.27 done
119 vapier 1.28 return 0
120 verwilst 1.1 }
121    
122 vapier 1.18 replace-flags() {
123 seemant 1.9 CFLAGS="${CFLAGS/${1}/${2} }"
124     CXXFLAGS="${CXXFLAGS/${1}/${2} }"
125 vapier 1.28 return 0
126 danarmak 1.7 }
127    
128     is-flag() {
129 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
130     if [ "${x}" == "$1" ] ; then
131 azarah 1.8 echo true
132 vapier 1.18 return 0
133     fi
134 danarmak 1.7 done
135 vapier 1.18 return 1
136 verwilst 1.1 }
137 azarah 1.8
138     strip-flags() {
139     local NEW_CFLAGS=""
140     local NEW_CXXFLAGS=""
141    
142 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
143 vapier 1.20 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
144     [ `use debug` ] && einfo "Enabling the use of some unstable flags"
145 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
146     fi
147    
148 azarah 1.8 set -f
149    
150     for x in ${CFLAGS}
151     do
152     for y in ${ALLOWED_FLAGS}
153     do
154 lostlogic 1.14 flag=${x%%=*}
155     if [ "${flag%%${y}}" = "" ]
156 azarah 1.8 then
157 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
158     break
159 azarah 1.8 fi
160     done
161     done
162    
163     for x in ${CXXFLAGS}
164     do
165     for y in ${ALLOWED_FLAGS}
166     do
167 lostlogic 1.14 flag=${x%%=*}
168     if [ "${flag%%${y}}" = "" ]
169 azarah 1.8 then
170 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
171     break
172 azarah 1.8 fi
173     done
174     done
175 azarah 1.30
176     # In case we filtered out all optimization flags fallback to -O2
177     if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
178     NEW_CFLAGS="${NEW_CFLAGS} -O2"
179     fi
180     if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
181     NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
182     fi
183 azarah 1.8
184     set +f
185    
186 vapier 1.20 [ `use debug` ] \
187     && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
188     && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
189    
190 azarah 1.8 export CFLAGS="${NEW_CFLAGS}"
191     export CXXFLAGS="${NEW_CXXFLAGS}"
192 puggy 1.29 }
193    
194     test_flag () {
195     if gcc -S -xc $1 -o /dev/null /dev/null >/dev/null 2>&1; then
196     echo "$1"
197     fi
198     }
199    
200     strip-unsupported-flags() {
201     for x in ${CFLAGS}
202     do
203     NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
204     done
205    
206     for x in ${CXXFLAGS}
207     do
208     NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
209     done
210    
211     CFLAGS="${NEW_CFLAGS}"
212     CXXFLAGS="${NEW_CXXFLAGS}"
213 azarah 1.8 }
214    
215 vapier 1.10 get-flag() {
216     local findflag="$1"
217     for f in ${CFLAGS} ${CXXFLAGS} ; do
218     if [ "${f/${findflag}}" != "${f}" ] ; then
219     echo "${f/-${findflag}=}"
220 vapier 1.28 return 0
221 vapier 1.10 fi
222     done
223 vapier 1.28 return 1
224 joker 1.16 }
225    
226 vapier 1.18 replace-sparc64-flags() {
227 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
228    
229     if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
230     then
231     for x in ${SPARC64_CPUS}
232     do
233     CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
234     done
235     else
236     for x in ${SPARC64_CPUS}
237     do
238     CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
239     done
240     fi
241    
242     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
243     then
244     for x in ${SPARC64_CPUS}
245     do
246     CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
247     done
248     else
249     for x in ${SPARC64_CPUS}
250     do
251     CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
252     done
253     fi
254 solar 1.27 }
255    
256     append-ldflags() {
257     LDFLAGS="${LDFLAGS} $@"
258 vapier 1.28 return 0
259 solar 1.27 }
260    
261     etexec-flags() {
262     has_version 'sys-devel/hardened-gcc' && {
263     debug-print ">>> appending flags -yet_exec"
264     append-flags -yet_exec
265     append-ldflags -yet_exec
266     }
267     }
268    
269     fstack-flags() {
270     has_version 'sys-devel/hardened-gcc' && {
271     debug-print ">>> appending flags -yno_propolice"
272     append-flags -yno_propolice
273     append-ldflags -yno_propolice
274     }
275 vapier 1.10 }

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