/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.23 Revision 1.40
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 1.23 2003/07/18 20:11:22 tester Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.40 2004/03/12 11:21:15 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"
16# Add extra flags to your current C[XX]FLAGS 16# Add extra flags to your current C[XX]FLAGS
17# 17#
18#### replace-flags <orig.flag> <new.flag> ### 18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one 19# Replace a flag by another one
20# 20#
21#### replace-cpu-flags <new.cpu> <old.cpus> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
21#### is-flag <flag> #### 25#### is-flag <flag> ####
22# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
23# Matches only complete a flag 27# Matches only complete a flag
24# 28#
25#### strip-flags #### 29#### strip-flags ####
26# Strip C[XX]FLAGS of everything except known 30# Strip C[XX]FLAGS of everything except known
27# good options. 31# good options.
28# 32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
29#### get-flag <flag> #### 37#### get-flag <flag> ####
30# Find and echo the value for a particular flag 38# Find and echo the value for a particular flag
31# 39#
32#### replace-sparc64-flags #### 40#### replace-sparc64-flags ####
33# Sets mcpu to v8 and uses the original value 41# Sets mcpu to v8 and uses the original value
34# as mtune if none specified. 42# as mtune if none specified.
35# 43#
36 44#### filter-mfpmath <math types> ####
45# Remove specified math types from the fpmath specification
46# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
47# will leave the user with -mfpmath=386
48#
49#### append-ldflags ####
50# Add extra flags to your current LDFLAGS
51#
52#### etexec-flags ####
53# hooked function for hardened-gcc that appends
54# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
55# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
56#
57#### fstack-flags ####
58# hooked function for hardened-gcc that appends
59# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
60# and a package is filtering -fstack-protector, -fstack-protector-all
61#
37 62
38# C[XX]FLAGS that we allow in strip-flags 63# C[XX]FLAGS that we allow in strip-flags
64setup-allowed-flags() {
39ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
40case "${ARCH}" in 66 case "${ARCH}" in
41 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
42 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
43esac 71 esac
44 72
45# C[XX]FLAGS that we are think is ok, but needs testing 73 # C[XX]FLAGS that we are think is ok, but needs testing
46# NOTE: currently -Os have issues with gcc3 and K6* arch's 74 # NOTE: currently -Os have issues with gcc3 and K6* arch's
47UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
76 return 0
77}
48 78
49filter-flags() { 79filter-flags() {
80 for x in "$@" ; do
81 case "${x}" in
82 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
83 -fstack-protector|-fstack-protector-all) fstack-flags;;
84 *) ;;
85 esac
86 done
87
50 # we do this fancy spacing stuff so as to not filter 88 # we do this fancy spacing stuff so as to not filter
51 # out part of a flag ... we want flag atoms ! :D 89 # out part of a flag ... we want flag atoms ! :D
52 export CFLAGS=" ${CFLAGS} " 90 CFLAGS=" ${CFLAGS} "
53 export CXXFLAGS=" ${CXXFLAGS} " 91 CXXFLAGS=" ${CXXFLAGS} "
54 for x in $@ ; do 92 for x in "$@" ; do
55 export CFLAGS="${CFLAGS/ ${x} / }" 93 CFLAGS="${CFLAGS// ${x} / }"
56 export CXXFLAGS="${CXXFLAGS/ ${x} / }" 94 CXXFLAGS="${CXXFLAGS// ${x} / }"
57 done 95 done
58 export CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
59 export CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
98 return 0
99}
100
101filter-lfs-flags() {
102 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
60} 103}
61 104
62append-flags() { 105append-flags() {
63 CFLAGS="${CFLAGS} $@" 106 export CFLAGS="${CFLAGS} $@"
64 CXXFLAGS="${CXXFLAGS} $@" 107 export CXXFLAGS="${CXXFLAGS} $@"
108 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
109 return 0
65} 110}
66 111
67replace-flags() { 112replace-flags() {
113 # we do this fancy spacing stuff so as to not filter
114 # out part of a flag ... we want flag atoms ! :D
115 CFLAGS=" ${CFLAGS} "
116 CXXFLAGS=" ${CXXFLAGS} "
68 CFLAGS="${CFLAGS/${1}/${2} }" 117 CFLAGS="${CFLAGS// ${1} / ${2} }"
69 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 118 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
119 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
120 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
121 return 0
122}
123
124replace-cpu-flags() {
125 local newcpu="$1" ; shift
126 local oldcpu=""
127 for oldcpu in "$@" ; do
128 replace-flags -march=${oldcpu} -march=${newcpu}
129 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
130 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
131 done
132 return 0
70} 133}
71 134
72is-flag() { 135is-flag() {
73 for x in ${CFLAGS} ${CXXFLAGS} ; do 136 for x in ${CFLAGS} ${CXXFLAGS} ; do
74 if [ "${x}" == "$1" ] ; then 137 if [ "${x}" == "$1" ] ; then
77 fi 140 fi
78 done 141 done
79 return 1 142 return 1
80} 143}
81 144
145filter-mfpmath() {
146 # save the original -mfpmath flag
147 local orig_mfpmath="`get-flag -mfpmath`"
148 # get the value of the current -mfpmath flag
149 local new_math=" `get-flag mfpmath | tr , ' '` "
150 # figure out which math values are to be removed
151 local prune_math=""
152 for prune_math in "$@" ; do
153 new_math="${new_math/ ${prune_math} / }"
154 done
155 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
156
157 if [ -z "${new_math}" ] ; then
158 # if we're removing all user specified math values are
159 # slated for removal, then we just filter the flag
160 filter-flags ${orig_mfpmath}
161 else
162 # if we only want to filter some of the user specified
163 # math values, then we replace the current flag
164 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
165 fi
166 return 0
167}
168
82strip-flags() { 169strip-flags() {
170 setup-allowed-flags
171
83 local NEW_CFLAGS="" 172 local NEW_CFLAGS=""
84 local NEW_CXXFLAGS="" 173 local NEW_CXXFLAGS=""
85 174
86 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 175 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
87 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 176 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
115 break 204 break
116 fi 205 fi
117 done 206 done
118 done 207 done
119 208
209 # In case we filtered out all optimization flags fallback to -O2
210 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
211 NEW_CFLAGS="${NEW_CFLAGS} -O2"
212 fi
213 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
214 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
215 fi
216
120 set +f 217 set +f
121 218
122 [ `use debug` ] \ 219 [ `use debug` ] \
123 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \ 220 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
124 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" 221 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
125 222
126 export CFLAGS="${NEW_CFLAGS}" 223 export CFLAGS="${NEW_CFLAGS}"
127 export CXXFLAGS="${NEW_CXXFLAGS}" 224 export CXXFLAGS="${NEW_CXXFLAGS}"
225 return 0
226}
227
228test_flag() {
229 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then
230 echo "$@"
231 return 0
232 fi
233 return 1
234}
235
236strip-unsupported-flags() {
237 for x in ${CFLAGS} ; do
238 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
239 done
240 for x in ${CXXFLAGS} ; do
241 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
242 done
243
244 export CFLAGS="${NEW_CFLAGS}"
245 export CXXFLAGS="${NEW_CXXFLAGS}"
128} 246}
129 247
130get-flag() { 248get-flag() {
249 # this code looks a little flaky but seems to work for
250 # everything we want ...
251 # for example, if CFLAGS="-march=i686":
252 # `get-flags -march` == "-march=i686"
253 # `get-flags march` == "i686"
131 local findflag="$1" 254 local findflag="$1"
132
133 for f in ${CFLAGS} ${CXXFLAGS} ; do 255 for f in ${CFLAGS} ${CXXFLAGS} ; do
134 if [ "${f/${findflag}}" != "${f}" ] ; then 256 if [ "${f/${findflag}}" != "${f}" ] ; then
135 echo "${f/-${findflag}=}" 257 echo "${f/-${findflag}=}"
136 return 258 return 0
137 fi 259 fi
138 done 260 done
261 return 1
139} 262}
140 263
141replace-sparc64-flags() { 264replace-sparc64-flags() {
142 local SPARC64_CPUS="ultrasparc v9" 265 local SPARC64_CPUS="ultrasparc v9"
143 266
165 do 288 do
166 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 289 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
167 done 290 done
168 fi 291 fi
169} 292}
293
294append-ldflags() {
295 LDFLAGS="${LDFLAGS} $@"
296 return 0
297}
298
299etexec-flags() {
300 has_version sys-devel/hardened-gcc
301 if [ $? == 0 ] ; then
302 if [ "`is-flag -yet_exec`" != "true" ]; then
303 debug-print ">>> appending flags -yet_exec"
304 append-flags -yet_exec
305 append-ldflags -yet_exec
306 fi
307 fi
308}
309
310fstack-flags() {
311 has_version sys-devel/hardened-gcc
312 if [ $? == 0 ] ; then
313 if [ "`is-flag -yno_propolice`" != "true" ]; then
314 debug-print ">>> appending flags -yno_propolice"
315 append-flags -yno_propolice
316 append-ldflags -yno_propolice
317 fi
318 fi
319}

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