/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.24 - (show annotations) (download)
Tue Jul 22 12:48:11 2003 UTC (11 years, 3 months ago) by aliz
Branch: MAIN
Branch point for: RELEASE-1_4
Changes since 1.23: +21 -1 lines
added filter-mfpmath function

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 1.23 2003/07/18 20:11:22 tester Exp $
4 #
5 # Author Bart Verwilst <verwilst@gentoo.org>
6
7 ECLASS=flag-o-matic
8 INHERITED="$INHERITED $ECLASS"
9
10 #
11 #### filter-flags <flags> ####
12 # Remove particular flags from C[XX]FLAGS
13 # Matches only complete flags
14 #
15 #### append-flags <flags> ####
16 # Add extra flags to your current C[XX]FLAGS
17 #
18 #### replace-flags <orig.flag> <new.flag> ###
19 # Replace a flag by another one
20 #
21 #### is-flag <flag> ####
22 # Returns "true" if flag is set in C[XX]FLAGS
23 # Matches only complete a flag
24 #
25 #### strip-flags ####
26 # Strip C[XX]FLAGS of everything except known
27 # good options.
28 #
29 #### get-flag <flag> ####
30 # Find and echo the value for a particular flag
31 #
32 #### replace-sparc64-flags ####
33 # Sets mcpu to v8 and uses the original value
34 # as mtune if none specified.
35 #
36
37
38 # C[XX]FLAGS that we allow in strip-flags
39 ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
40 case "${ARCH}" in
41 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
42 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
43 esac
44
45 # C[XX]FLAGS that we are think is ok, but needs testing
46 # NOTE: currently -Os have issues with gcc3 and K6* arch's
47 UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
48
49 filter-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 }
68
69 filter-flags() {
70 # we do this fancy spacing stuff so as to not filter
71 # out part of a flag ... we want flag atoms ! :D
72 export CFLAGS=" ${CFLAGS} "
73 export CXXFLAGS=" ${CXXFLAGS} "
74 for x in $@ ; do
75 export CFLAGS="${CFLAGS/ ${x} / }"
76 export CXXFLAGS="${CXXFLAGS/ ${x} / }"
77 done
78 export CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
79 export CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
80 }
81
82 append-flags() {
83 CFLAGS="${CFLAGS} $@"
84 CXXFLAGS="${CXXFLAGS} $@"
85 }
86
87 replace-flags() {
88 CFLAGS="${CFLAGS/${1}/${2} }"
89 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
90 }
91
92 is-flag() {
93 for x in ${CFLAGS} ${CXXFLAGS} ; do
94 if [ "${x}" == "$1" ] ; then
95 echo true
96 return 0
97 fi
98 done
99 return 1
100 }
101
102 strip-flags() {
103 local NEW_CFLAGS=""
104 local NEW_CXXFLAGS=""
105
106 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
107 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
108 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
109 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
110 fi
111
112 set -f
113
114 for x in ${CFLAGS}
115 do
116 for y in ${ALLOWED_FLAGS}
117 do
118 flag=${x%%=*}
119 if [ "${flag%%${y}}" = "" ]
120 then
121 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
122 break
123 fi
124 done
125 done
126
127 for x in ${CXXFLAGS}
128 do
129 for y in ${ALLOWED_FLAGS}
130 do
131 flag=${x%%=*}
132 if [ "${flag%%${y}}" = "" ]
133 then
134 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
135 break
136 fi
137 done
138 done
139
140 set +f
141
142 [ `use debug` ] \
143 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
144 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
145
146 export CFLAGS="${NEW_CFLAGS}"
147 export CXXFLAGS="${NEW_CXXFLAGS}"
148 }
149
150 get-flag() {
151 local findflag="$1"
152
153 for f in ${CFLAGS} ${CXXFLAGS} ; do
154 if [ "${f/${findflag}}" != "${f}" ] ; then
155 echo "${f/-${findflag}=}"
156 return
157 fi
158 done
159 }
160
161 replace-sparc64-flags() {
162 local SPARC64_CPUS="ultrasparc v9"
163
164 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
165 then
166 for x in ${SPARC64_CPUS}
167 do
168 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
169 done
170 else
171 for x in ${SPARC64_CPUS}
172 do
173 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
174 done
175 fi
176
177 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
178 then
179 for x in ${SPARC64_CPUS}
180 do
181 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
182 done
183 else
184 for x in ${SPARC64_CPUS}
185 do
186 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
187 done
188 fi
189 }

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