/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.24 Revision 1.36
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 1.36 2004/02/21 07:07:56 vapier 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 $ECLASS"
24# 24#
25#### strip-flags #### 25#### strip-flags ####
26# Strip C[XX]FLAGS of everything except known 26# Strip C[XX]FLAGS of everything except known
27# good options. 27# good options.
28# 28#
29#### strip-unsupported-flags ####
30# Strip C[XX]FLAGS of any flags not supported by
31# installed version of gcc
32#
29#### get-flag <flag> #### 33#### get-flag <flag> ####
30# Find and echo the value for a particular flag 34# Find and echo the value for a particular flag
31# 35#
32#### replace-sparc64-flags #### 36#### replace-sparc64-flags ####
33# Sets mcpu to v8 and uses the original value 37# Sets mcpu to v8 and uses the original value
34# as mtune if none specified. 38# as mtune if none specified.
35# 39#
36 40#### filter-mfpmath <math types> ####
41# Remove specified math types from the fpmath specification
42# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
43# will leave the user with -mfpmath=386
44#
45#### append-ldflags ####
46# Add extra flags to your current LDFLAGS
47#
48#### etexec-flags ####
49# hooked function for hardened-gcc that appends
50# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
51# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
52#
53#### fstack-flags ####
54# hooked function for hardened-gcc that appends
55# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
56# and a package is filtering -fstack-protector, -fstack-protector-all
57#
37 58
38# C[XX]FLAGS that we allow in strip-flags 59# C[XX]FLAGS that we allow in strip-flags
60setup-allowed-flags() {
39ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 61 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
40case "${ARCH}" in 62 case "${ARCH}" in
41 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 63 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
42 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 64 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
65 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
66 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
43esac 67 esac
44 68
45# C[XX]FLAGS that we are think is ok, but needs testing 69 # C[XX]FLAGS that we are think is ok, but needs testing
46# NOTE: currently -Os have issues with gcc3 and K6* arch's 70 # NOTE: currently -Os have issues with gcc3 and K6* arch's
47UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 71 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
48 72 return 0
49filter-mfpmath() {
50 for a in $CFLAGS; do
51 if [ "${a:0:8}" == "-mfpmath" ]; then
52 orig_mfpmath=$a
53 fi
54 done
55
56 mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
57 for b in $@; do
58 mfpmath="${mfpmath/$b}"
59 done
60
61 if [ -z "${mfpmath/ }" ]; then
62 filter-flags "$orig_mfpmath"
63 else
64 new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
65 replace-flags "$orig_mfpmath" "$new_mfpmath"
66 fi
67} 73}
68 74
69filter-flags() { 75filter-flags() {
76 for x in "$@" ; do
77 case "${x}" in
78 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;;
79 -fstack-protector|-fstack-protector-all) fstack-flags;;
80 *) ;;
81 esac
82 done
83
70 # we do this fancy spacing stuff so as to not filter 84 # we do this fancy spacing stuff so as to not filter
71 # out part of a flag ... we want flag atoms ! :D 85 # out part of a flag ... we want flag atoms ! :D
72 export CFLAGS=" ${CFLAGS} " 86 CFLAGS=" ${CFLAGS} "
73 export CXXFLAGS=" ${CXXFLAGS} " 87 CXXFLAGS=" ${CXXFLAGS} "
74 for x in $@ ; do 88 for x in "$@" ; do
75 export CFLAGS="${CFLAGS/ ${x} / }" 89 CFLAGS="${CFLAGS/ ${x} / }"
76 export CXXFLAGS="${CXXFLAGS/ ${x} / }" 90 CXXFLAGS="${CXXFLAGS/ ${x} / }"
77 done 91 done
78 export CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 92 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
79 export CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 93 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
94 return 0
80} 95}
81 96
82append-flags() { 97append-flags() {
83 CFLAGS="${CFLAGS} $@" 98 export CFLAGS="${CFLAGS} $@"
84 CXXFLAGS="${CXXFLAGS} $@" 99 export CXXFLAGS="${CXXFLAGS} $@"
100 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
101 return 0
85} 102}
86 103
87replace-flags() { 104replace-flags() {
105 # we do this fancy spacing stuff so as to not filter
106 # out part of a flag ... we want flag atoms ! :D
107 CFLAGS=" ${CFLAGS} "
108 CXXFLAGS=" ${CXXFLAGS} "
88 CFLAGS="${CFLAGS/${1}/${2} }" 109 CFLAGS="${CFLAGS/ ${1} / ${2} }"
89 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 110 CXXFLAGS="${CXXFLAGS/ ${1} / ${2} }"
111 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
112 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
113 return 0
90} 114}
91 115
92is-flag() { 116is-flag() {
93 for x in ${CFLAGS} ${CXXFLAGS} ; do 117 for x in ${CFLAGS} ${CXXFLAGS} ; do
94 if [ "${x}" == "$1" ] ; then 118 if [ "${x}" == "$1" ] ; then
97 fi 121 fi
98 done 122 done
99 return 1 123 return 1
100} 124}
101 125
126filter-mfpmath() {
127 # save the original -mfpmath flag
128 local orig_mfpmath="`get-flag -mfpmath`"
129 # get the value of the current -mfpmath flag
130 local new_math=" `get-flag mfpmath | tr , ' '` "
131 # figure out which math values are to be removed
132 local prune_math=""
133 for prune_math in "$@" ; do
134 new_math="${new_math/ ${prune_math} / }"
135 done
136 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
137
138 if [ -z "${new_math}" ] ; then
139 # if we're removing all user specified math values are
140 # slated for removal, then we just filter the flag
141 filter-flags ${orig_mfpmath}
142 else
143 # if we only want to filter some of the user specified
144 # math values, then we replace the current flag
145 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
146 fi
147 return 0
148}
149
102strip-flags() { 150strip-flags() {
151 setup-allowed-flags
152
103 local NEW_CFLAGS="" 153 local NEW_CFLAGS=""
104 local NEW_CXXFLAGS="" 154 local NEW_CXXFLAGS=""
105 155
106 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 156 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
107 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 157 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
135 break 185 break
136 fi 186 fi
137 done 187 done
138 done 188 done
139 189
190 # In case we filtered out all optimization flags fallback to -O2
191 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
192 NEW_CFLAGS="${NEW_CFLAGS} -O2"
193 fi
194 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
195 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
196 fi
197
140 set +f 198 set +f
141 199
142 [ `use debug` ] \ 200 [ `use debug` ] \
143 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \ 201 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
144 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" 202 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
145 203
146 export CFLAGS="${NEW_CFLAGS}" 204 export CFLAGS="${NEW_CFLAGS}"
147 export CXXFLAGS="${NEW_CXXFLAGS}" 205 export CXXFLAGS="${NEW_CXXFLAGS}"
206 return 0
207}
208
209test_flag() {
210 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then
211 echo "$@"
212 return 0
213 fi
214 return 1
215}
216
217strip-unsupported-flags() {
218 for x in ${CFLAGS} ; do
219 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
220 done
221 for x in ${CXXFLAGS} ; do
222 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
223 done
224
225 export CFLAGS="${NEW_CFLAGS}"
226 export CXXFLAGS="${NEW_CXXFLAGS}"
148} 227}
149 228
150get-flag() { 229get-flag() {
230 # this code looks a little flaky but seems to work for
231 # everything we want ...
232 # for example, if CFLAGS="-march=i686":
233 # `get-flags -march` == "-march=i686"
234 # `get-flags march` == "i686"
151 local findflag="$1" 235 local findflag="$1"
152
153 for f in ${CFLAGS} ${CXXFLAGS} ; do 236 for f in ${CFLAGS} ${CXXFLAGS} ; do
154 if [ "${f/${findflag}}" != "${f}" ] ; then 237 if [ "${f/${findflag}}" != "${f}" ] ; then
155 echo "${f/-${findflag}=}" 238 echo "${f/-${findflag}=}"
156 return 239 return 0
157 fi 240 fi
158 done 241 done
242 return 1
159} 243}
160 244
161replace-sparc64-flags() { 245replace-sparc64-flags() {
162 local SPARC64_CPUS="ultrasparc v9" 246 local SPARC64_CPUS="ultrasparc v9"
163 247
185 do 269 do
186 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 270 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
187 done 271 done
188 fi 272 fi
189} 273}
274
275append-ldflags() {
276 LDFLAGS="${LDFLAGS} $@"
277 return 0
278}
279
280etexec-flags() {
281 has_version sys-devel/hardened-gcc
282 if [ $? == 0 ] ; then
283 if [ "`is-flag -yet_exec`" != "true" ]; then
284 debug-print ">>> appending flags -yet_exec"
285 append-flags -yet_exec
286 append-ldflags -yet_exec
287 fi
288 fi
289}
290
291fstack-flags() {
292 has_version sys-devel/hardened-gcc
293 if [ $? == 0 ] ; then
294 if [ "`is-flag -yno_propolice`" != "true" ]; then
295 debug-print ">>> appending flags -yno_propolice"
296 append-flags -yno_propolice
297 append-ldflags -yno_propolice
298 fi
299 fi
300}

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