/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.24 Revision 1.32
1# Copyright 1999-2003 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 1.24 2003/07/22 12:48:11 aliz Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.32 2003/12/21 06:50:15 solar Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Author Bart Verwilst <verwilst@gentoo.org>
6 6
7ECLASS=flag-o-matic 7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS" 8INHERITED="$INHERITED $ECLASS"
24# 24#
25#### strip-flags #### 25#### strip-flags ####
26# Strip C[XX]FLAGS of everything except known 26# Strip C[XX]FLAGS of everything except known
27# good options. 27# good options.
28# 28#
29#### strip-unsupported-flags ####
30# Strip C[XX]FLAGS of any flags not supported by
31# installed version of gcc
32#
29#### get-flag <flag> #### 33#### get-flag <flag> ####
30# Find and echo the value for a particular flag 34# Find and echo the value for a particular flag
31# 35#
32#### replace-sparc64-flags #### 36#### replace-sparc64-flags ####
33# Sets mcpu to v8 and uses the original value 37# Sets mcpu to v8 and uses the original value
34# as mtune if none specified. 38# as mtune if none specified.
35# 39#
36 40#### filter-mfpmath <math types> ####
41# Remove specified math types from the fpmath specification
42# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
43# will leave the user with -mfpmath=386
44#
45#### append-ldflags ####
46# Add extra flags to your current LDFLAGS
47#
48#### etexec-flags ####
49# hooked function for hardened-gcc that appends
50# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
51# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
52#
53#### fstack-flags ####
54# hooked function for hardened-gcc that appends
55# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
56# and a package is filtering -fstack-protector, -fstack-protector-all
57#
37 58
38# C[XX]FLAGS that we allow in strip-flags 59# C[XX]FLAGS that we allow in strip-flags
39ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 60ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
40case "${ARCH}" in 61case "${ARCH}" in
41 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 62 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
42 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 63 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
64 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
65 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
43esac 66esac
44 67
45# C[XX]FLAGS that we are think is ok, but needs testing 68# C[XX]FLAGS that we are think is ok, but needs testing
46# NOTE: currently -Os have issues with gcc3 and K6* arch's 69# NOTE: currently -Os have issues with gcc3 and K6* arch's
47UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 70UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
65 replace-flags "$orig_mfpmath" "$new_mfpmath" 88 replace-flags "$orig_mfpmath" "$new_mfpmath"
66 fi 89 fi
67} 90}
68 91
69filter-flags() { 92filter-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
70 # we do this fancy spacing stuff so as to not filter 101 # we do this fancy spacing stuff so as to not filter
71 # out part of a flag ... we want flag atoms ! :D 102 # out part of a flag ... we want flag atoms ! :D
72 export CFLAGS=" ${CFLAGS} " 103 CFLAGS=" ${CFLAGS} "
73 export CXXFLAGS=" ${CXXFLAGS} " 104 CXXFLAGS=" ${CXXFLAGS} "
74 for x in $@ ; do 105 for x in $@ ; do
75 export CFLAGS="${CFLAGS/ ${x} / }" 106 CFLAGS="${CFLAGS/ ${x} / }"
76 export CXXFLAGS="${CXXFLAGS/ ${x} / }" 107 CXXFLAGS="${CXXFLAGS/ ${x} / }"
77 done 108 done
78 export CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 109 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
79 export CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 110 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
80} 111}
81 112
82append-flags() { 113append-flags() {
83 CFLAGS="${CFLAGS} $@" 114 CFLAGS="${CFLAGS} $@"
84 CXXFLAGS="${CXXFLAGS} $@" 115 CXXFLAGS="${CXXFLAGS} $@"
116 for x in $@; do
117 [ "${x}" = "-fno-stack-protector" -o "${x}" = "-fno-stack-protector-all" ] && fstack-flags
118 done
119 return 0
85} 120}
86 121
87replace-flags() { 122replace-flags() {
88 CFLAGS="${CFLAGS/${1}/${2} }" 123 CFLAGS="${CFLAGS/${1}/${2} }"
89 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 124 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
125 return 0
90} 126}
91 127
92is-flag() { 128is-flag() {
93 for x in ${CFLAGS} ${CXXFLAGS} ; do 129 for x in ${CFLAGS} ${CXXFLAGS} ; do
94 if [ "${x}" == "$1" ] ; then 130 if [ "${x}" == "$1" ] ; then
135 break 171 break
136 fi 172 fi
137 done 173 done
138 done 174 done
139 175
176 # In case we filtered out all optimization flags fallback to -O2
177 if [ "${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="${NEW_CXXFLAGS} -O2"
182 fi
183
140 set +f 184 set +f
141 185
142 [ `use debug` ] \ 186 [ `use debug` ] \
143 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \ 187 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
144 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" 188 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
145 189
146 export CFLAGS="${NEW_CFLAGS}" 190 export CFLAGS="${NEW_CFLAGS}"
147 export CXXFLAGS="${NEW_CXXFLAGS}" 191 export CXXFLAGS="${NEW_CXXFLAGS}"
148} 192}
149 193
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
150get-flag() { 215get-flag() {
151 local findflag="$1" 216 local findflag="$1"
152
153 for f in ${CFLAGS} ${CXXFLAGS} ; do 217 for f in ${CFLAGS} ${CXXFLAGS} ; do
154 if [ "${f/${findflag}}" != "${f}" ] ; then 218 if [ "${f/${findflag}}" != "${f}" ] ; then
155 echo "${f/-${findflag}=}" 219 echo "${f/-${findflag}=}"
156 return 220 return 0
157 fi 221 fi
158 done 222 done
223 return 1
159} 224}
160 225
161replace-sparc64-flags() { 226replace-sparc64-flags() {
162 local SPARC64_CPUS="ultrasparc v9" 227 local SPARC64_CPUS="ultrasparc v9"
163 228
185 do 250 do
186 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 251 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
187 done 252 done
188 fi 253 fi
189} 254}
255
256append-ldflags() {
257 LDFLAGS="${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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