/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.17 Revision 1.37
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 1.17 2003/04/27 20:57:46 azarah Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.37 2004/02/21 07:19:29 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#
35 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#
36 62
37# C[XX]FLAGS that we allow in strip-flags 63# C[XX]FLAGS that we allow in strip-flags
64setup-allowed-flags() {
38ALLOWED_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"
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
39 72
40# 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
41# NOTE: currently -Os have issues with gcc3 and K6* arch's 74 # NOTE: currently -Os have issues with gcc3 and K6* arch's
42UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 75 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
76 return 0
77}
43 78
44filter-flags () { 79filter-flags() {
45 80 for x in "$@" ; do
46 for x in $1 81 case "${x}" in
82 -fPIC|-fpic|-fPIE|-fpie) etexec-flags;;
83 -fstack-protector|-fstack-protector-all) fstack-flags;;
84 *) ;;
85 esac
47 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
48 export CFLAGS="${CFLAGS/${x}}" 93 CFLAGS="${CFLAGS// ${x} / }"
49 export CXXFLAGS="${CXXFLAGS/${x}}" 94 CXXFLAGS="${CXXFLAGS// ${x} / }"
50 done 95 done
51 96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
98 return 0
52} 99}
53 100
54append-flags () { 101append-flags() {
55
56 CFLAGS="${CFLAGS} $1" 102 export CFLAGS="${CFLAGS} $@"
57 CXXFLAGS="${CXXFLAGS} $1" 103 export CXXFLAGS="${CXXFLAGS} $@"
58 104 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
105 return 0
59} 106}
60 107
61replace-flags () { 108replace-flags() {
62 109 # we do this fancy spacing stuff so as to not filter
110 # out part of a flag ... we want flag atoms ! :D
111 CFLAGS=" ${CFLAGS} "
112 CXXFLAGS=" ${CXXFLAGS} "
63 CFLAGS="${CFLAGS/${1}/${2} }" 113 CFLAGS="${CFLAGS// ${1} / ${2} }"
64 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 114 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
115 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
116 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
117 return 0
118}
65 119
120replace-cpu-flags() {
121 local newcpu="$1" ; shift
122 local oldcpu=""
123 for oldcpu in "$@" ; do
124 replace-flags -march=${oldcpu} -march=${newcpu}
125 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
126 done
127 return 0
66} 128}
67 129
68is-flag() { 130is-flag() {
69
70 for x in ${CFLAGS} ${CXXFLAGS} 131 for x in ${CFLAGS} ${CXXFLAGS} ; do
71 do
72 if [ "${x}" = "$1" ] 132 if [ "${x}" == "$1" ] ; then
73 then
74 echo true 133 echo true
75 break 134 return 0
76 fi 135 fi
77 done 136 done
137 return 1
138}
78 139
140filter-mfpmath() {
141 # save the original -mfpmath flag
142 local orig_mfpmath="`get-flag -mfpmath`"
143 # get the value of the current -mfpmath flag
144 local new_math=" `get-flag mfpmath | tr , ' '` "
145 # figure out which math values are to be removed
146 local prune_math=""
147 for prune_math in "$@" ; do
148 new_math="${new_math/ ${prune_math} / }"
149 done
150 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
151
152 if [ -z "${new_math}" ] ; then
153 # if we're removing all user specified math values are
154 # slated for removal, then we just filter the flag
155 filter-flags ${orig_mfpmath}
156 else
157 # if we only want to filter some of the user specified
158 # math values, then we replace the current flag
159 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
160 fi
161 return 0
79} 162}
80 163
81strip-flags() { 164strip-flags() {
165 setup-allowed-flags
82 166
83 local NEW_CFLAGS="" 167 local NEW_CFLAGS=""
84 local NEW_CXXFLAGS="" 168 local NEW_CXXFLAGS=""
85 169
86 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 170 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
87 if [ "${ACCEPT_KEYWORDS/~/}" != "${ACCEPT_KEYWORDS}" -a \ 171 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
88 "${ACCEPT_KEYWORDS/-~/}" = "${ACCEPT_KEYWORDS}" ]
89 then
90 if use debug &> /dev/null
91 then
92 einfo "Enabling the use of some unstable flags" 172 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
93 fi
94
95 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 173 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
96 fi 174 fi
97 175
98 set -f 176 set -f
99 177
121 break 199 break
122 fi 200 fi
123 done 201 done
124 done 202 done
125 203
204 # In case we filtered out all optimization flags fallback to -O2
205 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
206 NEW_CFLAGS="${NEW_CFLAGS} -O2"
207 fi
208 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
209 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
210 fi
211
126 set +f 212 set +f
127 213
128 use debug &>/dev/null && einfo "CFLAGS=\"${NEW_CFLAGS}\"" 214 [ `use debug` ] \
215 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
129 use debug &>/dev/null && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" 216 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
130 217
131 export CFLAGS="${NEW_CFLAGS}" 218 export CFLAGS="${NEW_CFLAGS}"
132 export CXXFLAGS="${NEW_CXXFLAGS}" 219 export CXXFLAGS="${NEW_CXXFLAGS}"
220 return 0
221}
222
223test_flag() {
224 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then
225 echo "$@"
226 return 0
227 fi
228 return 1
229}
230
231strip-unsupported-flags() {
232 for x in ${CFLAGS} ; do
233 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
234 done
235 for x in ${CXXFLAGS} ; do
236 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
237 done
238
239 export CFLAGS="${NEW_CFLAGS}"
240 export CXXFLAGS="${NEW_CXXFLAGS}"
133} 241}
134 242
135get-flag() { 243get-flag() {
244 # this code looks a little flaky but seems to work for
245 # everything we want ...
246 # for example, if CFLAGS="-march=i686":
247 # `get-flags -march` == "-march=i686"
248 # `get-flags march` == "i686"
136 local findflag="$1" 249 local findflag="$1"
137
138 for f in ${CFLAGS} ${CXXFLAGS} ; do 250 for f in ${CFLAGS} ${CXXFLAGS} ; do
139 if [ "${f/${findflag}}" != "${f}" ] ; then 251 if [ "${f/${findflag}}" != "${f}" ] ; then
140 echo "${f/-${findflag}=}" 252 echo "${f/-${findflag}=}"
141 return 253 return 0
142 fi 254 fi
143 done 255 done
256 return 1
144} 257}
145 258
146replace-sparc64-flags () { 259replace-sparc64-flags() {
147
148 local SPARC64_CPUS="ultrasparc v9" 260 local SPARC64_CPUS="ultrasparc v9"
149 261
150 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ] 262 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
151 then 263 then
152 for x in ${SPARC64_CPUS} 264 for x in ${SPARC64_CPUS}
170 for x in ${SPARC64_CPUS} 282 for x in ${SPARC64_CPUS}
171 do 283 do
172 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 284 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
173 done 285 done
174 fi 286 fi
175
176} 287}
288
289append-ldflags() {
290 LDFLAGS="${LDFLAGS} $@"
291 return 0
292}
293
294etexec-flags() {
295 has_version sys-devel/hardened-gcc
296 if [ $? == 0 ] ; then
297 if [ "`is-flag -yet_exec`" != "true" ]; then
298 debug-print ">>> appending flags -yet_exec"
299 append-flags -yet_exec
300 append-ldflags -yet_exec
301 fi
302 fi
303}
304
305fstack-flags() {
306 has_version sys-devel/hardened-gcc
307 if [ $? == 0 ] ; then
308 if [ "`is-flag -yno_propolice`" != "true" ]; then
309 debug-print ">>> appending flags -yno_propolice"
310 append-flags -yno_propolice
311 append-ldflags -yno_propolice
312 fi
313 fi
314}

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