/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.24 Revision 1.47
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 1.47 2004/04/12 02:33:29 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"
… …
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#### 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#
37 66
38# C[XX]FLAGS that we allow in strip-flags 67# C[XX]FLAGS that we allow in strip-flags
68setup-allowed-flags() {
69 if [ -z "${ALLOWED_FLAGS}" ] ; then
39ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g" 70 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
40case "${ARCH}" in 71 case "${ARCH}" in
41 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 72 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
42 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 73 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
74 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
75 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
43esac 76 esac
77 fi
44 78
45# C[XX]FLAGS that we are think is ok, but needs testing 79 # C[XX]FLAGS that we are think is ok, but needs testing
46# NOTE: currently -Os have issues with gcc3 and K6* arch's 80 # NOTE: currently -Os have issues with gcc3 and K6* arch's
47UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 81 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
48 82 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" "$new_mfpmath"
66 fi
67} 83}
68 84
69filter-flags() { 85filter-flags() {
86 for x in "$@" ; do
87 case "${x}" in
88 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
89 -fstack-protector|-fstack-protector-all) fstack-flags;;
90 *) ;;
91 esac
92 done
93
70 # we do this fancy spacing stuff so as to not filter 94 # we do this fancy spacing stuff so as to not filter
71 # out part of a flag ... we want flag atoms ! :D 95 # out part of a flag ... we want flag atoms ! :D
72 export CFLAGS=" ${CFLAGS} " 96 CFLAGS=" ${CFLAGS} "
73 export CXXFLAGS=" ${CXXFLAGS} " 97 CXXFLAGS=" ${CXXFLAGS} "
74 for x in $@ ; do 98 for x in "$@" ; do
75 export CFLAGS="${CFLAGS/ ${x} / }" 99 CFLAGS="${CFLAGS// ${x} / }"
76 export CXXFLAGS="${CXXFLAGS/ ${x} / }" 100 CXXFLAGS="${CXXFLAGS// ${x} / }"
77 done 101 done
78 export CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 102 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
79 export CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 103 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
104 return 0
105}
106
107filter-lfs-flags() {
108 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
80} 109}
81 110
82append-flags() { 111append-flags() {
83 CFLAGS="${CFLAGS} $@" 112 export CFLAGS="${CFLAGS} $@"
84 CXXFLAGS="${CXXFLAGS} $@" 113 export CXXFLAGS="${CXXFLAGS} $@"
114 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
115 return 0
85} 116}
86 117
87replace-flags() { 118replace-flags() {
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=" ${CXXFLAGS} "
88 CFLAGS="${CFLAGS/${1}/${2} }" 123 CFLAGS="${CFLAGS// ${1} / ${2} }"
89 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 124 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
125 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
126 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
127 return 0
128}
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
90} 139}
91 140
92is-flag() { 141is-flag() {
93 for x in ${CFLAGS} ${CXXFLAGS} ; do 142 for x in ${CFLAGS} ${CXXFLAGS} ; do
94 if [ "${x}" == "$1" ] ; then 143 if [ "${x}" == "$1" ] ; then
… …
97 fi 146 fi
98 done 147 done
99 return 1 148 return 1
100} 149}
101 150
151filter-mfpmath() {
152 # save the original -mfpmath flag
153 local orig_mfpmath="`get-flag -mfpmath`"
154 # get the value of the current -mfpmath flag
155 local new_math=" `get-flag mfpmath | tr , ' '` "
156 # figure out which math values are to be removed
157 local prune_math=""
158 for prune_math in "$@" ; 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
173}
174
102strip-flags() { 175strip-flags() {
176 setup-allowed-flags
177
103 local NEW_CFLAGS="" 178 local NEW_CFLAGS=""
104 local NEW_CXXFLAGS="" 179 local NEW_CXXFLAGS=""
105 180
106 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 181 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
107 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 182 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
… …
135 break 210 break
136 fi 211 fi
137 done 212 done
138 done 213 done
139 214
215 # In case we filtered out all optimization flags fallback to -O2
216 if [ "${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="${NEW_CXXFLAGS} -O2"
221 fi
222
140 set +f 223 set +f
141 224
142 [ `use debug` ] \ 225 [ `use debug` ] \
143 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \ 226 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
144 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" 227 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
145 228
146 export CFLAGS="${NEW_CFLAGS}" 229 export CFLAGS="${NEW_CFLAGS}"
147 export CXXFLAGS="${NEW_CXXFLAGS}" 230 export CXXFLAGS="${NEW_CXXFLAGS}"
231 return 0
232}
233
234test_flag() {
235 if [ -z "`gcc -S -xc "$@" -o /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}"
148} 252}
149 253
150get-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"
151 local findflag="$1" 260 local findflag="$1"
152
153 for f in ${CFLAGS} ${CXXFLAGS} ; do 261 for f in ${CFLAGS} ${CXXFLAGS} ; do
154 if [ "${f/${findflag}}" != "${f}" ] ; then 262 if [ "${f/${findflag}}" != "${f}" ] ; then
155 echo "${f/-${findflag}=}" 263 echo "${f/-${findflag}=}"
156 return 264 return 0
157 fi 265 fi
158 done 266 done
267 return 1
268}
269
270has_pic() {
271 [ "${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
159} 291}
160 292
161replace-sparc64-flags() { 293replace-sparc64-flags() {
162 local SPARC64_CPUS="ultrasparc v9" 294 local SPARC64_CPUS="ultrasparc v9"
163 295
… …
185 do 317 do
186 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 318 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
187 done 319 done
188 fi 320 fi
189} 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 [ $? == 0 ] ; then
342 [ -z "`is-flag -yet_exec`" ] &&
343 export CFLAGS="${CFLAGS} `test_flag -yet_exec`"
344 [ -z "`is-flag -nopie`" ] &&
345 export CFLAGS="${CFLAGS} `test_flag -nopie`"
346 fi
347}
348
349fstack-flags() {
350 has_ssp
351 if [ $? == 0 ] ; then
352 [ -z "`is-flag -yno_propolice`" ] &&
353 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
354 fi
355}
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