/[gentoo-x86]/eclass/flag-o-matic.eclass
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Revision 1.27 - (show annotations) (download)
Wed Sep 24 05:51:32 2003 UTC (10 years, 9 months ago) by solar
Branch: MAIN
Changes since 1.26: +47 -1 lines
required hardened-gcc hooks for fPIC and propolice

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 1.26 2003/09/15 15:21:04 vapier 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" ] &&
113 fstack-flags
114 done
115 }
116
117 replace-flags() {
118 CFLAGS="${CFLAGS/${1}/${2} }"
119 CXXFLAGS="${CXXFLAGS/${1}/${2} }"
120 }
121
122 is-flag() {
123 for x in ${CFLAGS} ${CXXFLAGS} ; do
124 if [ "${x}" == "$1" ] ; then
125 echo true
126 return 0
127 fi
128 done
129 return 1
130 }
131
132 strip-flags() {
133 local NEW_CFLAGS=""
134 local NEW_CXXFLAGS=""
135
136 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
137 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
138 [ `use debug` ] && einfo "Enabling the use of some unstable flags"
139 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
140 fi
141
142 set -f
143
144 for x in ${CFLAGS}
145 do
146 for y in ${ALLOWED_FLAGS}
147 do
148 flag=${x%%=*}
149 if [ "${flag%%${y}}" = "" ]
150 then
151 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
152 break
153 fi
154 done
155 done
156
157 for x in ${CXXFLAGS}
158 do
159 for y in ${ALLOWED_FLAGS}
160 do
161 flag=${x%%=*}
162 if [ "${flag%%${y}}" = "" ]
163 then
164 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
165 break
166 fi
167 done
168 done
169
170 set +f
171
172 [ `use debug` ] \
173 && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
174 && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
175
176 export CFLAGS="${NEW_CFLAGS}"
177 export CXXFLAGS="${NEW_CXXFLAGS}"
178 }
179
180 get-flag() {
181 local findflag="$1"
182
183 for f in ${CFLAGS} ${CXXFLAGS} ; do
184 if [ "${f/${findflag}}" != "${f}" ] ; then
185 echo "${f/-${findflag}=}"
186 return
187 fi
188 done
189 }
190
191 replace-sparc64-flags() {
192 local SPARC64_CPUS="ultrasparc v9"
193
194 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
195 then
196 for x in ${SPARC64_CPUS}
197 do
198 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
199 done
200 else
201 for x in ${SPARC64_CPUS}
202 do
203 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
204 done
205 fi
206
207 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
208 then
209 for x in ${SPARC64_CPUS}
210 do
211 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
212 done
213 else
214 for x in ${SPARC64_CPUS}
215 do
216 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
217 done
218 fi
219 }
220
221 append-ldflags() {
222 LDFLAGS="${LDFLAGS} $@"
223 }
224
225 etexec-flags() {
226 has_version 'sys-devel/hardened-gcc' && {
227 debug-print ">>> appending flags -yet_exec"
228 append-flags -yet_exec
229 append-ldflags -yet_exec
230 }
231 }
232
233 fstack-flags() {
234 has_version 'sys-devel/hardened-gcc' && {
235 debug-print ">>> appending flags -yno_propolice"
236 append-flags -yno_propolice
237 append-ldflags -yno_propolice
238 }
239 }

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