/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.26 - (show annotations) (download)
Mon Sep 15 15:21:04 2003 UTC (10 years, 7 months ago) by vapier
Branch: MAIN
Changes since 1.25: +5 -2 lines
add explanation of filter mfpmath

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 1.25 2003/08/20 04:11:27 agriffis Exp $
4 #
5 # Author Bart Verwilst <verwilst@gentoo.org>
6
7 ECLASS=flag-o-matic
8 INHERITED="$INHERITED $ECLASS"
9
10 #
11 #### filter-flags <flags> ####
12 # Remove particular flags from C[XX]FLAGS
13 # Matches only complete flags
14 #
15 #### append-flags <flags> ####
16 # Add extra flags to your current C[XX]FLAGS
17 #
18 #### replace-flags <orig.flag> <new.flag> ###
19 # Replace a flag by another one
20 #
21 #### is-flag <flag> ####
22 # Returns "true" if flag is set in C[XX]FLAGS
23 # Matches only complete a flag
24 #
25 #### strip-flags ####
26 # Strip C[XX]FLAGS of everything except known
27 # good options.
28 #
29 #### get-flag <flag> ####
30 # Find and echo the value for a particular flag
31 #
32 #### replace-sparc64-flags ####
33 # Sets mcpu to v8 and uses the original value
34 # as mtune if none specified.
35 #
36 #### filter-mfpmath <math types> ####
37 # Remove specified math types from the fpmath specification
38 # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
39 # will leave the user with -mfpmath=386
40
41 # C[XX]FLAGS that we allow in strip-flags
42 ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
43 case "${ARCH}" in
44 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
45 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
46 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
47 esac
48
49 # C[XX]FLAGS that we are think is ok, but needs testing
50 # NOTE: currently -Os have issues with gcc3 and K6* arch's
51 UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
52
53 filter-mfpmath() {
54 for a in $CFLAGS; do
55 if [ "${a:0:8}" == "-mfpmath" ]; then
56 orig_mfpmath=$a
57 fi
58 done
59
60 mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
61 for b in $@; do
62 mfpmath="${mfpmath/$b}"
63 done
64
65 if [ -z "${mfpmath/ }" ]; then
66 filter-flags "$orig_mfpmath"
67 else
68 new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
69 replace-flags "$orig_mfpmath" "$new_mfpmath"
70 fi
71 }
72
73 filter-flags() {
74 # we do this fancy spacing stuff so as to not filter
75 # out part of a flag ... we want flag atoms ! :D
76 CFLAGS=" ${CFLAGS} "
77 CXXFLAGS=" ${CXXFLAGS} "
78 for x in $@ ; do
79 CFLAGS="${CFLAGS/ ${x} / }"
80 CXXFLAGS="${CXXFLAGS/ ${x} / }"
81 done
82 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
83 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
84 }
85
86 append-flags() {
87 CFLAGS="${CFLAGS} $@"
88 CXXFLAGS="${CXXFLAGS} $@"
89 }
90
91 replace-flags() {
92 CFLAGS="${CFLAGS/${1}/${2} }"
93 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
94 }
95
96 is-flag() {
97 for x in ${CFLAGS} ${CXXFLAGS} ; do
98 if [ "${x}" == "$1" ] ; then
99 echo true
100 return 0
101 fi
102 done
103 return 1
104 }
105
106 strip-flags() {
107 local NEW_CFLAGS=""
108 local NEW_CXXFLAGS=""
109
110 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
111 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
112 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
113 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
114 fi
115
116 set -f
117
118 for x in ${CFLAGS}
119 do
120 for y in ${ALLOWED_FLAGS}
121 do
122 flag=${x%%=*}
123 if [ "${flag%%${y}}" = "" ]
124 then
125 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
126 break
127 fi
128 done
129 done
130
131 for x in ${CXXFLAGS}
132 do
133 for y in ${ALLOWED_FLAGS}
134 do
135 flag=${x%%=*}
136 if [ "${flag%%${y}}" = "" ]
137 then
138 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
139 break
140 fi
141 done
142 done
143
144 set +f
145
146 [ `use debug` ] \
147 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
148 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
149
150 export CFLAGS="${NEW_CFLAGS}"
151 export CXXFLAGS="${NEW_CXXFLAGS}"
152 }
153
154 get-flag() {
155 local findflag="$1"
156
157 for f in ${CFLAGS} ${CXXFLAGS} ; do
158 if [ "${f/${findflag}}" != "${f}" ] ; then
159 echo "${f/-${findflag}=}"
160 return
161 fi
162 done
163 }
164
165 replace-sparc64-flags() {
166 local SPARC64_CPUS="ultrasparc v9"
167
168 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
169 then
170 for x in ${SPARC64_CPUS}
171 do
172 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
173 done
174 else
175 for x in ${SPARC64_CPUS}
176 do
177 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
178 done
179 fi
180
181 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
182 then
183 for x in ${SPARC64_CPUS}
184 do
185 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
186 done
187 else
188 for x in ${SPARC64_CPUS}
189 do
190 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
191 done
192 fi
193 }

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