/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.28 - (show annotations) (download)
Sun Oct 26 00:40:52 2003 UTC (11 years, 1 month ago) by vapier
Branch: MAIN
Changes since 1.27: +7 -5 lines
fix return values

1 # Copyright 1999-2003 Gentoo Technologies, Inc.
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /home/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.27 2003/09/24 05:51:32 solar Exp $
4 #
5 # Author Bart Verwilst <verwilst@gentoo.org>
6
7 ECLASS=flag-o-matic
8 INHERITED="$INHERITED $ECLASS"
9
10 #
11 #### filter-flags <flags> ####
12 # Remove particular flags from C[XX]FLAGS
13 # Matches only complete flags
14 #
15 #### append-flags <flags> ####
16 # Add extra flags to your current C[XX]FLAGS
17 #
18 #### replace-flags <orig.flag> <new.flag> ###
19 # Replace a flag by another one
20 #
21 #### is-flag <flag> ####
22 # Returns "true" if flag is set in C[XX]FLAGS
23 # Matches only complete a flag
24 #
25 #### strip-flags ####
26 # Strip C[XX]FLAGS of everything except known
27 # good options.
28 #
29 #### get-flag <flag> ####
30 # Find and echo the value for a particular flag
31 #
32 #### replace-sparc64-flags ####
33 # Sets mcpu to v8 and uses the original value
34 # as mtune if none specified.
35 #
36 #### filter-mfpmath <math types> ####
37 # Remove specified math types from the fpmath specification
38 # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
39 # will leave the user with -mfpmath=386
40 #
41 #### append-ldflags ####
42 # Add extra flags to your current LDFLAGS
43 #
44 #### etexec-flags ####
45 # hooked function for hardened-gcc that appends
46 # -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
47 # and a package is filtering -fPIC
48 #
49 #### fstack-flags ####
50 # hooked function for hardened-gcc that appends
51 # -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
52 # and a package is filtering -fstack-protector
53 #
54
55 # C[XX]FLAGS that we allow in strip-flags
56 ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
57 case "${ARCH}" in
58 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
59 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
60 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
61 esac
62
63 # C[XX]FLAGS that we are think is ok, but needs testing
64 # NOTE: currently -Os have issues with gcc3 and K6* arch's
65 UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
66
67 filter-mfpmath() {
68 for a in $CFLAGS; do
69 if [ "${a:0:8}" == "-mfpmath" ]; then
70 orig_mfpmath=$a
71 fi
72 done
73
74 mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
75 for b in $@; do
76 mfpmath="${mfpmath/$b}"
77 done
78
79 if [ -z "${mfpmath/ }" ]; then
80 filter-flags "$orig_mfpmath"
81 else
82 new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
83 replace-flags "$orig_mfpmath" "$new_mfpmath"
84 fi
85 }
86
87 filter-flags() {
88 # we do two loops to avoid the first and last char from being chomped.
89 for x in $@ ; do
90 case "${x}" in
91 -fPIC) etexec-flags;;
92 -fstack-protector) fstack-flags;;
93 *) ;;
94 esac
95 done
96 # we do this fancy spacing stuff so as to not filter
97 # out part of a flag ... we want flag atoms ! :D
98 CFLAGS=" ${CFLAGS} "
99 CXXFLAGS=" ${CXXFLAGS} "
100 for x in $@ ; do
101 CFLAGS="${CFLAGS/ ${x} / }"
102 CXXFLAGS="${CXXFLAGS/ ${x} / }"
103 done
104 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
105 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
106 }
107
108 append-flags() {
109 CFLAGS="${CFLAGS} $@"
110 CXXFLAGS="${CXXFLAGS} $@"
111 for x in $@; do
112 [ "${x}" = "-fno-stack-protector" ] && fstack-flags
113 done
114 return 0
115 }
116
117 replace-flags() {
118 CFLAGS="${CFLAGS/${1}/${2} }"
119 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
120 return 0
121 }
122
123 is-flag() {
124 for x in ${CFLAGS} ${CXXFLAGS} ; do
125 if [ "${x}" == "$1" ] ; then
126 echo true
127 return 0
128 fi
129 done
130 return 1
131 }
132
133 strip-flags() {
134 local NEW_CFLAGS=""
135 local NEW_CXXFLAGS=""
136
137 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
138 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
139 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
140 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
141 fi
142
143 set -f
144
145 for x in ${CFLAGS}
146 do
147 for y in ${ALLOWED_FLAGS}
148 do
149 flag=${x%%=*}
150 if [ "${flag%%${y}}" = "" ]
151 then
152 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
153 break
154 fi
155 done
156 done
157
158 for x in ${CXXFLAGS}
159 do
160 for y in ${ALLOWED_FLAGS}
161 do
162 flag=${x%%=*}
163 if [ "${flag%%${y}}" = "" ]
164 then
165 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
166 break
167 fi
168 done
169 done
170
171 set +f
172
173 [ `use debug` ] \
174 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
175 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
176
177 export CFLAGS="${NEW_CFLAGS}"
178 export CXXFLAGS="${NEW_CXXFLAGS}"
179 }
180
181 get-flag() {
182 local findflag="$1"
183 for f in ${CFLAGS} ${CXXFLAGS} ; do
184 if [ "${f/${findflag}}" != "${f}" ] ; then
185 echo "${f/-${findflag}=}"
186 return 0
187 fi
188 done
189 return 1
190 }
191
192 replace-sparc64-flags() {
193 local SPARC64_CPUS="ultrasparc v9"
194
195 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
196 then
197 for x in ${SPARC64_CPUS}
198 do
199 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
200 done
201 else
202 for x in ${SPARC64_CPUS}
203 do
204 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
205 done
206 fi
207
208 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
209 then
210 for x in ${SPARC64_CPUS}
211 do
212 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
213 done
214 else
215 for x in ${SPARC64_CPUS}
216 do
217 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
218 done
219 fi
220 }
221
222 append-ldflags() {
223 LDFLAGS="${LDFLAGS} $@"
224 return 0
225 }
226
227 etexec-flags() {
228 has_version 'sys-devel/hardened-gcc' && {
229 debug-print ">>> appending flags -yet_exec"
230 append-flags -yet_exec
231 append-ldflags -yet_exec
232 }
233 }
234
235 fstack-flags() {
236 has_version 'sys-devel/hardened-gcc' && {
237 debug-print ">>> appending flags -yno_propolice"
238 append-flags -yno_propolice
239 append-ldflags -yno_propolice
240 }
241 }

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