/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.3 Revision 1.32
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 1.32 2003/12/21 06:50:15 solar 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 $ECLASS"
6 9
7# 10#
8#### filter-flags <flag> #### 11#### filter-flags <flags> ####
9# Remove particular flags from C[XX]FLAGS 12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
10# 14#
11#### append-flags <flag> #### 15#### append-flags <flags> ####
12# Add extra flags to your current C[XX]FLAGS 16# Add extra flags to your current C[XX]FLAGS
13# 17#
14#### change-flags <orig.flag> <new.flag> ### 18#### replace-flags <orig.flag> <new.flag> ###
15# Replace a flag by another one 19# Replace a flag by another one
16# 20#
21#### is-flag <flag> ####
22# Returns "true" if flag is set in C[XX]FLAGS
23# Matches only complete a flag
24#
25#### strip-flags ####
26# Strip C[XX]FLAGS of everything except known
27# good options.
28#
29#### strip-unsupported-flags ####
30# Strip C[XX]FLAGS of any flags not supported by
31# installed version of gcc
32#
33#### get-flag <flag> ####
34# Find and echo the value for a particular flag
35#
36#### replace-sparc64-flags ####
37# Sets mcpu to v8 and uses the original value
38# as mtune if none specified.
39#
40#### filter-mfpmath <math types> ####
41# Remove specified math types from the fpmath specification
42# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
43# will leave the user with -mfpmath=386
44#
45#### append-ldflags ####
46# Add extra flags to your current LDFLAGS
47#
48#### etexec-flags ####
49# hooked function for hardened-gcc that appends
50# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
51# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
52#
53#### fstack-flags ####
54# hooked function for hardened-gcc that appends
55# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
56# and a package is filtering -fstack-protector, -fstack-protector-all
57#
17 58
59# C[XX]FLAGS that we allow in strip-flags
60ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
61case "${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" ;;
66esac
18 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
70UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
71
72filter-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
19filter-flags () { 92filter-flags() {
20 93 # we do two loops to avoid the first and last char from being chomped.
21 for x in $1; do 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 $@ ; do
22 CFLAGS="${CFLAGS/$x}" 106 CFLAGS="${CFLAGS/ ${x} / }"
23 CXXFLAGS="${CXXFLAGS/$x}" 107 CXXFLAGS="${CXXFLAGS/ ${x} / }"
24 done 108 done
25 109 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
110 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
26} 111}
27 112
28append-flags () { 113append-flags() {
29
30
31 CFLAGS="$CFLAGS $1" 114 CFLAGS="${CFLAGS} $@"
32 CXXFLAGS="$CXXFLAGS $1" 115 CXXFLAGS="${CXXFLAGS} $@"
33 116 for x in $@; do
117 [ "${x}" = "-fno-stack-protector" -o "${x}" = "-fno-stack-protector-all" ] && fstack-flags
118 done
119 return 0
34} 120}
35 121
36change-flags () { 122replace-flags() {
37
38 CFLAGS="${CFLAGS/${1}/${2}" 123 CFLAGS="${CFLAGS/${1}/${2} }"
39 CXXFLAGS="${CXXFLAGS/${1}/${2}" 124 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
40 125 return 0
41} 126}
127
128is-flag() {
129 for x in ${CFLAGS} ${CXXFLAGS} ; do
130 if [ "${x}" == "$1" ] ; then
131 echo true
132 return 0
133 fi
134 done
135 return 1
136}
137
138strip-flags() {
139 local NEW_CFLAGS=""
140 local NEW_CXXFLAGS=""
141
142 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
143 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
144 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
145 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
146 fi
147
148 set -f
149
150 for x in ${CFLAGS}
151 do
152 for y in ${ALLOWED_FLAGS}
153 do
154 flag=${x%%=*}
155 if [ "${flag%%${y}}" = "" ]
156 then
157 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
158 break
159 fi
160 done
161 done
162
163 for x in ${CXXFLAGS}
164 do
165 for y in ${ALLOWED_FLAGS}
166 do
167 flag=${x%%=*}
168 if [ "${flag%%${y}}" = "" ]
169 then
170 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
171 break
172 fi
173 done
174 done
175
176 # In case we filtered out all optimization flags fallback to -O2
177 if [ "${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="${NEW_CXXFLAGS} -O2"
182 fi
183
184 set +f
185
186 [ `use debug` ] \
187 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
188 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
189
190 export CFLAGS="${NEW_CFLAGS}"
191 export CXXFLAGS="${NEW_CXXFLAGS}"
192}
193
194test_flag () {
195 if gcc -S -xc $1 -o /dev/null /dev/null >/dev/null 2>&1; then
196 echo "$1"
197 fi
198}
199
200strip-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}
214
215get-flag() {
216 local findflag="$1"
217 for f in ${CFLAGS} ${CXXFLAGS} ; do
218 if [ "${f/${findflag}}" != "${f}" ] ; then
219 echo "${f/-${findflag}=}"
220 return 0
221 fi
222 done
223 return 1
224}
225
226replace-sparc64-flags() {
227 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}
255
256append-ldflags() {
257 LDFLAGS="${LDFLAGS} $@"
258 return 0
259}
260
261etexec-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
269fstack-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}

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