/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.15 Revision 1.46
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 1.15 2003/04/06 23:35:41 method Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.46 2004/04/10 17:15:37 swtaylor 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#
40#### replace-sparc64-flags ####
41# Sets mcpu to v8 and uses the original value
42# as mtune if none specified.
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#### filter-ldflags <flags> ####
53# Remove particular flags from LDFLAGS
54# Matches only complete flags
55#
56#### etexec-flags ####
57# hooked function for hardened-gcc that appends
58# -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
59# and a package is filtering -fPIC,-fpic, -fPIE, -fpie
60#
61#### fstack-flags ####
62# hooked function for hardened-gcc that appends
63# -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
64# and a package is filtering -fstack-protector, -fstack-protector-all
65#
31 66
67# C[XX]FLAGS that we allow in strip-flags
68setup-allowed-flags() {
69 if [ -z "${ALLOWED_FLAGS}" ] ; then
32ALLOWED_FLAGS="-O -mcpu -march -mtune -fstack-protector -pipe -g" 70 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
71 case "${ARCH}" in
72 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
73 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
74 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
75 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
76 esac
77 fi
33 78
79 # C[XX]FLAGS that we are think is ok, but needs testing
80 # NOTE: currently -Os have issues with gcc3 and K6* arch's
81 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
82 return 0
83}
34 84
35filter-flags () { 85filter-flags() {
36 86 for x in "$@" ; do
37 for x in $1 87 case "${x}" in
88 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
89 -fstack-protector|-fstack-protector-all) fstack-flags;;
90 *) ;;
91 esac
38 do 92 done
93
94 # we do this fancy spacing stuff so as to not filter
95 # out part of a flag ... we want flag atoms ! :D
96 CFLAGS=" ${CFLAGS} "
97 CXXFLAGS=" ${CXXFLAGS} "
98 for x in "$@" ; do
39 export CFLAGS="${CFLAGS/${x}}" 99 CFLAGS="${CFLAGS// ${x} / }"
40 export CXXFLAGS="${CXXFLAGS/${x}}" 100 CXXFLAGS="${CXXFLAGS// ${x} / }"
41 done 101 done
42 102 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
103 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
104 return 0
43} 105}
44 106
107filter-lfs-flags() {
108 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
109}
110
45append-flags () { 111append-flags() {
46
47 CFLAGS="${CFLAGS} $1" 112 export CFLAGS="${CFLAGS} $@"
48 CXXFLAGS="${CXXFLAGS} $1" 113 export CXXFLAGS="${CXXFLAGS} $@"
49 114 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
115 return 0
50} 116}
51 117
52replace-flags () { 118replace-flags() {
53 119 # we do this fancy spacing stuff so as to not filter
120 # out part of a flag ... we want flag atoms ! :D
121 CFLAGS=" ${CFLAGS} "
122 CXXFLAGS=" ${CXXFLAGS} "
54 CFLAGS="${CFLAGS/${1}/${2} }" 123 CFLAGS="${CFLAGS// ${1} / ${2} }"
55 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 124 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
125 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
126 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
127 return 0
128}
56 129
130replace-cpu-flags() {
131 local newcpu="$1" ; shift
132 local oldcpu=""
133 for oldcpu in "$@" ; do
134 replace-flags -march=${oldcpu} -march=${newcpu}
135 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu}
136 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
137 done
138 return 0
57} 139}
58 140
59is-flag() { 141is-flag() {
60
61 for x in ${CFLAGS} ${CXXFLAGS} 142 for x in ${CFLAGS} ${CXXFLAGS} ; do
62 do
63 if [ "${x}" = "$1" ] 143 if [ "${x}" == "$1" ] ; then
64 then
65 echo true 144 echo true
66 break 145 return 0
67 fi 146 fi
68 done 147 done
148 return 1
149}
69 150
151filter-mfpmath() {
152 # save the original -mfpmath flag
153 local orig_mfpmath="`get-flag -mfpmath`"
154 # get the value of the current -mfpmath flag
155 local new_math=" `get-flag mfpmath | tr , ' '` "
156 # figure out which math values are to be removed
157 local prune_math=""
158 for prune_math in "$@" ; do
159 new_math="${new_math/ ${prune_math} / }"
160 done
161 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
162
163 if [ -z "${new_math}" ] ; then
164 # if we're removing all user specified math values are
165 # slated for removal, then we just filter the flag
166 filter-flags ${orig_mfpmath}
167 else
168 # if we only want to filter some of the user specified
169 # math values, then we replace the current flag
170 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
171 fi
172 return 0
70} 173}
71 174
72strip-flags() { 175strip-flags() {
176 setup-allowed-flags
73 177
74 local NEW_CFLAGS="" 178 local NEW_CFLAGS=""
75 local NEW_CXXFLAGS="" 179 local NEW_CXXFLAGS=""
180
181 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
182 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
183 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
184 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
185 fi
76 186
77 set -f 187 set -f
78 188
79 for x in ${CFLAGS} 189 for x in ${CFLAGS}
80 do 190 do
100 break 210 break
101 fi 211 fi
102 done 212 done
103 done 213 done
104 214
215 # In case we filtered out all optimization flags fallback to -O2
216 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
217 NEW_CFLAGS="${NEW_CFLAGS} -O2"
218 fi
219 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
220 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
221 fi
222
105 set +f 223 set +f
224
225 [ `use debug` ] \
226 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
227 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
106 228
107 export CFLAGS="${NEW_CFLAGS}" 229 export CFLAGS="${NEW_CFLAGS}"
108 export CXXFLAGS="${NEW_CXXFLAGS}" 230 export CXXFLAGS="${NEW_CXXFLAGS}"
231 return 0
232}
233
234test_flag() {
235 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then
236 echo "$@"
237 return 0
238 fi
239 return 1
240}
241
242strip-unsupported-flags() {
243 for x in ${CFLAGS} ; do
244 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
245 done
246 for x in ${CXXFLAGS} ; do
247 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
248 done
249
250 export CFLAGS="${NEW_CFLAGS}"
251 export CXXFLAGS="${NEW_CXXFLAGS}"
109} 252}
110 253
111get-flag() { 254get-flag() {
255 # this code looks a little flaky but seems to work for
256 # everything we want ...
257 # for example, if CFLAGS="-march=i686":
258 # `get-flags -march` == "-march=i686"
259 # `get-flags march` == "i686"
112 local findflag="$1" 260 local findflag="$1"
113
114 for f in ${CFLAGS} ${CXXFLAGS} ; do 261 for f in ${CFLAGS} ${CXXFLAGS} ; do
115 if [ "${f/${findflag}}" != "${f}" ] ; then 262 if [ "${f/${findflag}}" != "${f}" ] ; then
116 echo "${f/-${findflag}=}" 263 echo "${f/-${findflag}=}"
117 return 264 return 0
118 fi 265 fi
119 done 266 done
267 return 1
120} 268}
269
270has_pic() {
271 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
272 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
273 has_version sys-devel/hardened-gcc && return 0
274 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
275 return 1
276}
277
278has_pie() {
279 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
280 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
281 has_version sys-devel/hardened-gcc && return 0
282 [ ! -z "`${CC/ .*/} --version| grep pie`" ] && return 0
283 return 1
284}
285
286has_ssp() {
287 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
288 has_version sys-devel/hardened-gcc && return 0
289 [ ! -z "`${CC/ .*/} --version| grep ssp`" ] && return 0
290 return 1
291}
292
293replace-sparc64-flags() {
294 local SPARC64_CPUS="ultrasparc v9"
295
296 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
297 then
298 for x in ${SPARC64_CPUS}
299 do
300 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
301 done
302 else
303 for x in ${SPARC64_CPUS}
304 do
305 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
306 done
307 fi
308
309 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
310 then
311 for x in ${SPARC64_CPUS}
312 do
313 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
314 done
315 else
316 for x in ${SPARC64_CPUS}
317 do
318 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
319 done
320 fi
321}
322
323append-ldflags() {
324 LDFLAGS="${LDFLAGS} $@"
325 return 0
326}
327
328filter-ldflags() {
329 # we do this fancy spacing stuff so as to not filter
330 # out part of a flag ... we want flag atoms ! :D
331 LDFLAGS=" ${LDFLAGS} "
332 for x in "$@" ; do
333 LDFLAGS="${LDFLAGS// ${x} / }"
334 done
335 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
336 return 0
337}
338
339etexec-flags() {
340 has_pie || has_pic
341 if [ $? == 0 ] ; then
342 if [ "`is-flag -yet_exec`" != "true" ]; then
343 debug-print ">>> appending flags -yet_exec"
344 export CFLAGS="${CFLAGS} `test_flag -yet_exec`"
345 fi
346 fi
347}
348
349fstack-flags() {
350 has_ssp
351 if [ $? == 0 ] ; then
352 if [ "`is-flag -yno_propolice`" != "true" ]; then
353 debug-print ">>> appending flags -fno-stack-protector"
354 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
355 fi
356 fi
357}

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