/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.24 Revision 1.29
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 1.29 2003/10/31 23:03:40 puggy 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 $ECLASS"
24# 24#
25#### strip-flags #### 25#### strip-flags ####
26# Strip C[XX]FLAGS of everything except known 26# Strip C[XX]FLAGS of everything except known
27# good options. 27# good options.
28# 28#
29#### strip-unsupported-flags ####
30# Strip C[XX]FLAGS of any flags not supported by
31# installed version of gcc
32#
29#### get-flag <flag> #### 33#### get-flag <flag> ####
30# Find and echo the value for a particular flag 34# Find and echo the value for a particular flag
31# 35#
32#### replace-sparc64-flags #### 36#### replace-sparc64-flags ####
33# Sets mcpu to v8 and uses the original value 37# Sets mcpu to v8 and uses the original value
34# as mtune if none specified. 38# as mtune if none specified.
35# 39#
36 40#### filter-mfpmath <math types> ####
41# Remove specified math types from the fpmath specification
42# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
43# will leave the user with -mfpmath=386
44#
45#### append-ldflags ####
46# Add extra flags to your current LDFLAGS
47#
48#### etexec-flags ####
49# hooked function for hardened-gcc that appends
50# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
51# and a package is filtering -fPIC
52#
53#### fstack-flags ####
54# hooked function for hardened-gcc that appends
55# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
56# and a package is filtering -fstack-protector
57#
37 58
38# C[XX]FLAGS that we allow in strip-flags 59# C[XX]FLAGS that we allow in strip-flags
39ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 60ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
40case "${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" ;;
43esac 65esac
44 66
45# C[XX]FLAGS that we are think is ok, but needs testing 67# C[XX]FLAGS that we are think is ok, but needs testing
46# NOTE: currently -Os have issues with gcc3 and K6* arch's 68# NOTE: currently -Os have issues with gcc3 and K6* arch's
47UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 69UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
65 replace-flags "$orig_mfpmath" "$new_mfpmath" 87 replace-flags "$orig_mfpmath" "$new_mfpmath"
66 fi 88 fi
67} 89}
68 90
69filter-flags() { 91filter-flags() {
92 # we do two loops to avoid the first and last char from being chomped.
93 for x in $@ ; do
94 case "${x}" in
95 -fPIC) etexec-flags;;
96 -fstack-protector) fstack-flags;;
97 *) ;;
98 esac
99 done
70 # we do this fancy spacing stuff so as to not filter 100 # we do this fancy spacing stuff so as to not filter
71 # out part of a flag ... we want flag atoms ! :D 101 # out part of a flag ... we want flag atoms ! :D
72 export CFLAGS=" ${CFLAGS} " 102 CFLAGS=" ${CFLAGS} "
73 export CXXFLAGS=" ${CXXFLAGS} " 103 CXXFLAGS=" ${CXXFLAGS} "
74 for x in $@ ; do 104 for x in $@ ; do
75 export CFLAGS="${CFLAGS/ ${x} / }" 105 CFLAGS="${CFLAGS/ ${x} / }"
76 export CXXFLAGS="${CXXFLAGS/ ${x} / }" 106 CXXFLAGS="${CXXFLAGS/ ${x} / }"
77 done 107 done
78 export CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 108 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
79 export CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 109 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
80} 110}
81 111
82append-flags() { 112append-flags() {
83 CFLAGS="${CFLAGS} $@" 113 CFLAGS="${CFLAGS} $@"
84 CXXFLAGS="${CXXFLAGS} $@" 114 CXXFLAGS="${CXXFLAGS} $@"
115 for x in $@; do
116 [ "${x}" = "-fno-stack-protector" ] && fstack-flags
117 done
118 return 0
85} 119}
86 120
87replace-flags() { 121replace-flags() {
88 CFLAGS="${CFLAGS/${1}/${2} }" 122 CFLAGS="${CFLAGS/${1}/${2} }"
89 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 123 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
124 return 0
90} 125}
91 126
92is-flag() { 127is-flag() {
93 for x in ${CFLAGS} ${CXXFLAGS} ; do 128 for x in ${CFLAGS} ${CXXFLAGS} ; do
94 if [ "${x}" == "$1" ] ; then 129 if [ "${x}" == "$1" ] ; then
145 180
146 export CFLAGS="${NEW_CFLAGS}" 181 export CFLAGS="${NEW_CFLAGS}"
147 export CXXFLAGS="${NEW_CXXFLAGS}" 182 export CXXFLAGS="${NEW_CXXFLAGS}"
148} 183}
149 184
185test_flag () {
186 if gcc -S -xc $1 -o /dev/null /dev/null >/dev/null 2>&1; then
187 echo "$1"
188 fi
189}
190
191strip-unsupported-flags() {
192 for x in ${CFLAGS}
193 do
194 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
195 done
196
197 for x in ${CXXFLAGS}
198 do
199 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
200 done
201
202 CFLAGS="${NEW_CFLAGS}"
203 CXXFLAGS="${NEW_CXXFLAGS}"
204}
205
150get-flag() { 206get-flag() {
151 local findflag="$1" 207 local findflag="$1"
152
153 for f in ${CFLAGS} ${CXXFLAGS} ; do 208 for f in ${CFLAGS} ${CXXFLAGS} ; do
154 if [ "${f/${findflag}}" != "${f}" ] ; then 209 if [ "${f/${findflag}}" != "${f}" ] ; then
155 echo "${f/-${findflag}=}" 210 echo "${f/-${findflag}=}"
156 return 211 return 0
157 fi 212 fi
158 done 213 done
214 return 1
159} 215}
160 216
161replace-sparc64-flags() { 217replace-sparc64-flags() {
162 local SPARC64_CPUS="ultrasparc v9" 218 local SPARC64_CPUS="ultrasparc v9"
163 219
185 do 241 do
186 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 242 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
187 done 243 done
188 fi 244 fi
189} 245}
246
247append-ldflags() {
248 LDFLAGS="${LDFLAGS} $@"
249 return 0
250}
251
252etexec-flags() {
253 has_version 'sys-devel/hardened-gcc' && {
254 debug-print ">>> appending flags -yet_exec"
255 append-flags -yet_exec
256 append-ldflags -yet_exec
257 }
258}
259
260fstack-flags() {
261 has_version 'sys-devel/hardened-gcc' && {
262 debug-print ">>> appending flags -yno_propolice"
263 append-flags -yno_propolice
264 append-ldflags -yno_propolice
265 }
266}

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