/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.16 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 1.16 2003/04/19 18:20:56 joker 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"
9 9
10# 10#
11#### filter-flags <flag> #### 11#### filter-flags <flags> ####
12# Remove particular flags from C[XX]FLAGS 12# Remove particular flags from C[XX]FLAGS
13# Matches only complete flags
13# 14#
14#### append-flags <flag> #### 15#### append-flags <flags> ####
15# Add extra flags to your current C[XX]FLAGS 16# Add extra flags to your current C[XX]FLAGS
16# 17#
17#### replace-flags <orig.flag> <new.flag> ### 18#### replace-flags <orig.flag> <new.flag> ###
18# Replace a flag by another one 19# Replace a flag by another one
19# 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#
20#### is-flag <flag> #### 25#### is-flag <flag> ####
21# Returns "true" if flag is set in C[XX]FLAGS 26# Returns "true" if flag is set in C[XX]FLAGS
22# Matches only complete flag 27# Matches only complete a flag
23# 28#
24#### strip-flags #### 29#### strip-flags ####
25# Strip C[XX]FLAGS of everything except known 30# Strip C[XX]FLAGS of everything except known
26# good options. 31# good options.
27# 32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
28#### get-flag <flag> #### 37#### get-flag <flag> ####
29# Find and echo the value for a particular flag 38# Find and echo the value for a particular flag
30# 39#
31#### replace-sparc64-flags #### 40#### replace-sparc64-flags ####
32# Sets mcpu to v8 and uses the original value 41# Sets mcpu to v8 and uses the original value
33# as mtune if none specified. 42# as mtune if none specified.
34# 43#
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#
35 62
36 63# C[XX]FLAGS that we allow in strip-flags
64setup-allowed-flags() {
37ALLOWED_FLAGS="-O -mcpu -march -mtune -fstack-protector -pipe -g" 65 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
66 case "${ARCH}" in
67 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
68 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
69 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
70 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
71 esac
38 72
73 # C[XX]FLAGS that we are think is ok, but needs testing
74 # NOTE: currently -Os have issues with gcc3 and K6* arch's
75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
76 return 0
77}
39 78
40filter-flags () { 79filter-flags() {
41 80 for x in "$@" ; do
42 for x in $1 81 case "${x}" in
82 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
83 -fstack-protector|-fstack-protector-all) fstack-flags;;
84 *) ;;
85 esac
43 do 86 done
87
88 # we do this fancy spacing stuff so as to not filter
89 # out part of a flag ... we want flag atoms ! :D
90 CFLAGS=" ${CFLAGS} "
91 CXXFLAGS=" ${CXXFLAGS} "
92 for x in "$@" ; do
44 export CFLAGS="${CFLAGS/${x}}" 93 CFLAGS="${CFLAGS// ${x} / }"
45 export CXXFLAGS="${CXXFLAGS/${x}}" 94 CXXFLAGS="${CXXFLAGS// ${x} / }"
46 done 95 done
47 96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
98 return 0
48} 99}
49 100
101filter-lfs-flags() {
102 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
103}
104
50append-flags () { 105append-flags() {
51
52 CFLAGS="${CFLAGS} $1" 106 export CFLAGS="${CFLAGS} $@"
53 CXXFLAGS="${CXXFLAGS} $1" 107 export CXXFLAGS="${CXXFLAGS} $@"
54 108 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
109 return 0
55} 110}
56 111
57replace-flags () { 112replace-flags() {
58 113 # 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=" ${CXXFLAGS} "
59 CFLAGS="${CFLAGS/${1}/${2} }" 117 CFLAGS="${CFLAGS// ${1} / ${2} }"
60 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 118 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
119 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
120 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
121 return 0
122}
61 123
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
62} 133}
63 134
64is-flag() { 135is-flag() {
65
66 for x in ${CFLAGS} ${CXXFLAGS} 136 for x in ${CFLAGS} ${CXXFLAGS} ; do
67 do
68 if [ "${x}" = "$1" ] 137 if [ "${x}" == "$1" ] ; then
69 then
70 echo true 138 echo true
71 break 139 return 0
72 fi 140 fi
73 done 141 done
142 return 1
143}
74 144
145filter-mfpmath() {
146 # save the original -mfpmath flag
147 local orig_mfpmath="`get-flag -mfpmath`"
148 # get the value of the current -mfpmath flag
149 local new_math=" `get-flag mfpmath | tr , ' '` "
150 # figure out which math values are to be removed
151 local prune_math=""
152 for prune_math in "$@" ; 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
75} 167}
76 168
77strip-flags() { 169strip-flags() {
170 setup-allowed-flags
78 171
79 local NEW_CFLAGS="" 172 local NEW_CFLAGS=""
80 local NEW_CXXFLAGS="" 173 local NEW_CXXFLAGS=""
174
175 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
176 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
177 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
178 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
179 fi
81 180
82 set -f 181 set -f
83 182
84 for x in ${CFLAGS} 183 for x in ${CFLAGS}
85 do 184 do
105 break 204 break
106 fi 205 fi
107 done 206 done
108 done 207 done
109 208
209 # In case we filtered out all optimization flags fallback to -O2
210 if [ "${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="${NEW_CXXFLAGS} -O2"
215 fi
216
110 set +f 217 set +f
218
219 [ `use debug` ] \
220 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
221 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
111 222
112 export CFLAGS="${NEW_CFLAGS}" 223 export CFLAGS="${NEW_CFLAGS}"
113 export CXXFLAGS="${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}"
114} 246}
115 247
116get-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"
117 local findflag="$1" 254 local findflag="$1"
118
119 for f in ${CFLAGS} ${CXXFLAGS} ; do 255 for f in ${CFLAGS} ${CXXFLAGS} ; do
120 if [ "${f/${findflag}}" != "${f}" ] ; then 256 if [ "${f/${findflag}}" != "${f}" ] ; then
121 echo "${f/-${findflag}=}" 257 echo "${f/-${findflag}=}"
122 return 258 return 0
123 fi 259 fi
124 done 260 done
261 return 1
125} 262}
126 263
127replace-sparc64-flags () { 264replace-sparc64-flags() {
128
129 local SPARC64_CPUS="ultrasparc v9" 265 local SPARC64_CPUS="ultrasparc v9"
130 266
131 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 267 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
132 then 268 then
133 for x in ${SPARC64_CPUS} 269 for x in ${SPARC64_CPUS}
151 for x in ${SPARC64_CPUS} 287 for x in ${SPARC64_CPUS}
152 do 288 do
153 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 289 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
154 done 290 done
155 fi 291 fi
156
157} 292}
293
294append-ldflags() {
295 LDFLAGS="${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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