/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.33 - (show annotations) (download)
Wed Dec 31 16:51:35 2003 UTC (10 years, 8 months ago) by vapier
Branch: MAIN
Changes since 1.32: +2 -4 lines
is-flag() is free

1 # Copyright 1999-2003 Gentoo Technologies, Inc.
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /home/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.32 2003/12/21 06:50:15 solar Exp $
4 #
5 # Author Bart Verwilst <verwilst@gentoo.org>
6
7 ECLASS=flag-o-matic
8 INHERITED="$INHERITED $ECLASS"
9
10 #
11 #### filter-flags <flags> ####
12 # Remove particular flags from C[XX]FLAGS
13 # Matches only complete flags
14 #
15 #### append-flags <flags> ####
16 # Add extra flags to your current C[XX]FLAGS
17 #
18 #### replace-flags <orig.flag> <new.flag> ###
19 # Replace a flag by another one
20 #
21 #### is-flag <flag> ####
22 # Returns "true" if flag is set in C[XX]FLAGS
23 # Matches only complete a flag
24 #
25 #### strip-flags ####
26 # Strip C[XX]FLAGS of everything except known
27 # good options.
28 #
29 #### strip-unsupported-flags ####
30 # Strip C[XX]FLAGS of any flags not supported by
31 # installed version of gcc
32 #
33 #### get-flag <flag> ####
34 # Find and echo the value for a particular flag
35 #
36 #### replace-sparc64-flags ####
37 # Sets mcpu to v8 and uses the original value
38 # as mtune if none specified.
39 #
40 #### filter-mfpmath <math types> ####
41 # Remove specified math types from the fpmath specification
42 # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
43 # will leave the user with -mfpmath=386
44 #
45 #### append-ldflags ####
46 # Add extra flags to your current LDFLAGS
47 #
48 #### etexec-flags ####
49 # hooked function for hardened-gcc that appends
50 # -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
51 # and a package is filtering -fPIC,-fpic, -fPIE, -fpie
52 #
53 #### fstack-flags ####
54 # hooked function for hardened-gcc that appends
55 # -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
56 # and a package is filtering -fstack-protector, -fstack-protector-all
57 #
58
59 # C[XX]FLAGS that we allow in strip-flags
60 ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
61 case "${ARCH}" in
62 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
63 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
64 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
65 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
66 esac
67
68 # 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
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
92 filter-flags() {
93 # we do two loops to avoid the first and last char from being chomped.
94 for x in $@ ; do
95 case "${x}" in
96 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;;
97 -fstack-protector|-fstack-protector-all) fstack-flags;;
98 *) ;;
99 esac
100 done
101 # we do this fancy spacing stuff so as to not filter
102 # out part of a flag ... we want flag atoms ! :D
103 CFLAGS=" ${CFLAGS} "
104 CXXFLAGS=" ${CXXFLAGS} "
105 for x in $@ ; do
106 CFLAGS="${CFLAGS/ ${x} / }"
107 CXXFLAGS="${CXXFLAGS/ ${x} / }"
108 done
109 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
110 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
111 }
112
113 append-flags() {
114 CFLAGS="${CFLAGS} $@"
115 CXXFLAGS="${CXXFLAGS} $@"
116 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
117 return 0
118 }
119
120 replace-flags() {
121 CFLAGS="${CFLAGS/${1}/${2} }"
122 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
123 return 0
124 }
125
126 is-flag() {
127 for x in ${CFLAGS} ${CXXFLAGS} ; do
128 if [ "${x}" == "$1" ] ; then
129 echo true
130 return 0
131 fi
132 done
133 return 1
134 }
135
136 strip-flags() {
137 local NEW_CFLAGS=""
138 local NEW_CXXFLAGS=""
139
140 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
141 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
142 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
143 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
144 fi
145
146 set -f
147
148 for x in ${CFLAGS}
149 do
150 for y in ${ALLOWED_FLAGS}
151 do
152 flag=${x%%=*}
153 if [ "${flag%%${y}}" = "" ]
154 then
155 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
156 break
157 fi
158 done
159 done
160
161 for x in ${CXXFLAGS}
162 do
163 for y in ${ALLOWED_FLAGS}
164 do
165 flag=${x%%=*}
166 if [ "${flag%%${y}}" = "" ]
167 then
168 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
169 break
170 fi
171 done
172 done
173
174 # In case we filtered out all optimization flags fallback to -O2
175 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
176 NEW_CFLAGS="${NEW_CFLAGS} -O2"
177 fi
178 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
179 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
180 fi
181
182 set +f
183
184 [ `use debug` ] \
185 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
186 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
187
188 export CFLAGS="${NEW_CFLAGS}"
189 export CXXFLAGS="${NEW_CXXFLAGS}"
190 }
191
192 test_flag () {
193 if gcc -S -xc $1 -o /dev/null /dev/null >/dev/null 2>&1; then
194 echo "$1"
195 fi
196 }
197
198 strip-unsupported-flags() {
199 for x in ${CFLAGS}
200 do
201 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
202 done
203
204 for x in ${CXXFLAGS}
205 do
206 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
207 done
208
209 CFLAGS="${NEW_CFLAGS}"
210 CXXFLAGS="${NEW_CXXFLAGS}"
211 }
212
213 get-flag() {
214 local findflag="$1"
215 for f in ${CFLAGS} ${CXXFLAGS} ; do
216 if [ "${f/${findflag}}" != "${f}" ] ; then
217 echo "${f/-${findflag}=}"
218 return 0
219 fi
220 done
221 return 1
222 }
223
224 replace-sparc64-flags() {
225 local SPARC64_CPUS="ultrasparc v9"
226
227 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
228 then
229 for x in ${SPARC64_CPUS}
230 do
231 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
232 done
233 else
234 for x in ${SPARC64_CPUS}
235 do
236 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
237 done
238 fi
239
240 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
241 then
242 for x in ${SPARC64_CPUS}
243 do
244 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
245 done
246 else
247 for x in ${SPARC64_CPUS}
248 do
249 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
250 done
251 fi
252 }
253
254 append-ldflags() {
255 LDFLAGS="${LDFLAGS} $@"
256 return 0
257 }
258
259 etexec-flags() {
260 has_version 'sys-devel/hardened-gcc' && {
261 debug-print ">>> appending flags -yet_exec"
262 append-flags -yet_exec
263 append-ldflags -yet_exec
264 }
265 }
266
267 fstack-flags() {
268 has_version 'sys-devel/hardened-gcc' && {
269 debug-print ">>> appending flags -yno_propolice"
270 append-flags -yno_propolice
271 append-ldflags -yno_propolice
272 }
273 }

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