/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.24 Revision 1.39
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 1.39 2004/03/12 05:14:45 solar 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"
48 76 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" "$new_mfpmath"
66 fi
67} 77}
68 78
69filter-flags() { 79filter-flags() {
80 for x in "$@" ; 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
70 # we do this fancy spacing stuff so as to not filter 88 # we do this fancy spacing stuff so as to not filter
71 # out part of a flag ... we want flag atoms ! :D 89 # out part of a flag ... we want flag atoms ! :D
72 export CFLAGS=" ${CFLAGS} " 90 CFLAGS=" ${CFLAGS} "
73 export CXXFLAGS=" ${CXXFLAGS} " 91 CXXFLAGS=" ${CXXFLAGS} "
74 for x in $@ ; do 92 for x in "$@" ; do
75 export CFLAGS="${CFLAGS/ ${x} / }" 93 CFLAGS="${CFLAGS// ${x} / }"
76 export CXXFLAGS="${CXXFLAGS/ ${x} / }" 94 CXXFLAGS="${CXXFLAGS// ${x} / }"
77 done 95 done
78 export CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 96 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
79 export CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 97 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
98 return 0
80} 99}
81 100
82append-flags() { 101append-flags() {
83 CFLAGS="${CFLAGS} $@" 102 export CFLAGS="${CFLAGS} $@"
84 CXXFLAGS="${CXXFLAGS} $@" 103 export CXXFLAGS="${CXXFLAGS} $@"
104 [ "`is-flag -fno-stack-protector`" -o "`is-flag -fno-stack-protector-all`" ] && fstack-flags
105 return 0
85} 106}
86 107
87replace-flags() { 108replace-flags() {
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=" ${CXXFLAGS} "
88 CFLAGS="${CFLAGS/${1}/${2} }" 113 CFLAGS="${CFLAGS// ${1} / ${2} }"
89 CXXFLAGS="${CXXFLAGS/${1}/${2} }" 114 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }"
115 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
116 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
117 return 0
118}
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 replace-flags -mtune=${oldcpu} -mtune=${newcpu}
127 done
128 return 0
90} 129}
91 130
92is-flag() { 131is-flag() {
93 for x in ${CFLAGS} ${CXXFLAGS} ; do 132 for x in ${CFLAGS} ${CXXFLAGS} ; do
94 if [ "${x}" == "$1" ] ; then 133 if [ "${x}" == "$1" ] ; then
97 fi 136 fi
98 done 137 done
99 return 1 138 return 1
100} 139}
101 140
141filter-mfpmath() {
142 # save the original -mfpmath flag
143 local orig_mfpmath="`get-flag -mfpmath`"
144 # get the value of the current -mfpmath flag
145 local new_math=" `get-flag mfpmath | tr , ' '` "
146 # figure out which math values are to be removed
147 local prune_math=""
148 for prune_math in "$@" ; do
149 new_math="${new_math/ ${prune_math} / }"
150 done
151 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`"
152
153 if [ -z "${new_math}" ] ; then
154 # if we're removing all user specified math values are
155 # slated for removal, then we just filter the flag
156 filter-flags ${orig_mfpmath}
157 else
158 # if we only want to filter some of the user specified
159 # math values, then we replace the current flag
160 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
161 fi
162 return 0
163}
164
102strip-flags() { 165strip-flags() {
166 setup-allowed-flags
167
103 local NEW_CFLAGS="" 168 local NEW_CFLAGS=""
104 local NEW_CXXFLAGS="" 169 local NEW_CXXFLAGS=""
105 170
106 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 171 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
107 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then 172 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
135 break 200 break
136 fi 201 fi
137 done 202 done
138 done 203 done
139 204
205 # In case we filtered out all optimization flags fallback to -O2
206 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
207 NEW_CFLAGS="${NEW_CFLAGS} -O2"
208 fi
209 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
210 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
211 fi
212
140 set +f 213 set +f
141 214
142 [ `use debug` ] \ 215 [ `use debug` ] \
143 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \ 216 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
144 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\"" 217 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
145 218
146 export CFLAGS="${NEW_CFLAGS}" 219 export CFLAGS="${NEW_CFLAGS}"
147 export CXXFLAGS="${NEW_CXXFLAGS}" 220 export CXXFLAGS="${NEW_CXXFLAGS}"
221 return 0
222}
223
224test_flag() {
225 if gcc -S -xc "$@" -o /dev/null /dev/null >/dev/null 2>&1; then
226 echo "$@"
227 return 0
228 fi
229 return 1
230}
231
232strip-unsupported-flags() {
233 for x in ${CFLAGS} ; do
234 NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
235 done
236 for x in ${CXXFLAGS} ; do
237 NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
238 done
239
240 export CFLAGS="${NEW_CFLAGS}"
241 export CXXFLAGS="${NEW_CXXFLAGS}"
148} 242}
149 243
150get-flag() { 244get-flag() {
245 # this code looks a little flaky but seems to work for
246 # everything we want ...
247 # for example, if CFLAGS="-march=i686":
248 # `get-flags -march` == "-march=i686"
249 # `get-flags march` == "i686"
151 local findflag="$1" 250 local findflag="$1"
152
153 for f in ${CFLAGS} ${CXXFLAGS} ; do 251 for f in ${CFLAGS} ${CXXFLAGS} ; do
154 if [ "${f/${findflag}}" != "${f}" ] ; then 252 if [ "${f/${findflag}}" != "${f}" ] ; then
155 echo "${f/-${findflag}=}" 253 echo "${f/-${findflag}=}"
156 return 254 return 0
157 fi 255 fi
158 done 256 done
257 return 1
159} 258}
160 259
161replace-sparc64-flags() { 260replace-sparc64-flags() {
162 local SPARC64_CPUS="ultrasparc v9" 261 local SPARC64_CPUS="ultrasparc v9"
163 262
185 do 284 do
186 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 285 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
187 done 286 done
188 fi 287 fi
189} 288}
289
290append-ldflags() {
291 LDFLAGS="${LDFLAGS} $@"
292 return 0
293}
294
295etexec-flags() {
296 has_version sys-devel/hardened-gcc
297 if [ $? == 0 ] ; then
298 if [ "`is-flag -yet_exec`" != "true" ]; then
299 debug-print ">>> appending flags -yet_exec"
300 append-flags -yet_exec
301 append-ldflags -yet_exec
302 fi
303 fi
304}
305
306fstack-flags() {
307 has_version sys-devel/hardened-gcc
308 if [ $? == 0 ] ; then
309 if [ "`is-flag -yno_propolice`" != "true" ]; then
310 debug-print ">>> appending flags -yno_propolice"
311 append-flags -yno_propolice
312 append-ldflags -yno_propolice
313 fi
314 fi
315}

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