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Revision 1.29 - (hide annotations) (download)
Fri Oct 31 23:03:40 2003 UTC (10 years, 8 months ago) by puggy
Branch: MAIN
Changes since 1.28: +26 -1 lines
Added strip-unsupported-flags as per bug #26390

1 vapier 1.12 # Copyright 1999-2003 Gentoo Technologies, Inc.
2 verwilst 1.1 # Distributed under the terms of the GNU General Public License v2
3 puggy 1.29 # $Header: /home/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.28 2003/10/26 00:40:52 vapier Exp $
4 vapier 1.12 #
5 verwilst 1.1 # Author Bart Verwilst <verwilst@gentoo.org>
6 azarah 1.8
7 verwilst 1.1 ECLASS=flag-o-matic
8 danarmak 1.6 INHERITED="$INHERITED $ECLASS"
9 azarah 1.8
10 verwilst 1.2 #
11 vapier 1.18 #### filter-flags <flags> ####
12 verwilst 1.3 # Remove particular flags from C[XX]FLAGS
13 vapier 1.18 # Matches only complete flags
14 verwilst 1.2 #
15 vapier 1.18 #### append-flags <flags> ####
16 verwilst 1.3 # Add extra flags to your current C[XX]FLAGS
17     #
18 verwilst 1.4 #### replace-flags <orig.flag> <new.flag> ###
19 verwilst 1.3 # Replace a flag by another one
20     #
21 danarmak 1.7 #### is-flag <flag> ####
22     # Returns "true" if flag is set in C[XX]FLAGS
23 vapier 1.18 # Matches only complete a flag
24 danarmak 1.7 #
25 azarah 1.8 #### strip-flags ####
26     # Strip C[XX]FLAGS of everything except known
27     # good options.
28     #
29 puggy 1.29 #### strip-unsupported-flags ####
30     # Strip C[XX]FLAGS of any flags not supported by
31     # installed version of gcc
32     #
33 vapier 1.10 #### get-flag <flag> ####
34     # Find and echo the value for a particular flag
35     #
36 joker 1.16 #### replace-sparc64-flags ####
37     # Sets mcpu to v8 and uses the original value
38     # as mtune if none specified.
39     #
40 vapier 1.26 #### filter-mfpmath <math types> ####
41     # Remove specified math types from the fpmath specification
42     # If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
43     # will leave the user with -mfpmath=386
44 solar 1.27 #
45     #### append-ldflags ####
46     # Add extra flags to your current LDFLAGS
47     #
48     #### etexec-flags ####
49     # hooked function for hardened-gcc that appends
50     # -yet_exec {C,CXX,LD}FLAGS when hardened-gcc is installed
51     # and a package is filtering -fPIC
52     #
53     #### fstack-flags ####
54     # hooked function for hardened-gcc that appends
55     # -yno_propolice to {C,CXX,LD}FLAGS when hardened-gcc is installed
56     # and a package is filtering -fstack-protector
57     #
58 verwilst 1.3
59 azarah 1.17 # C[XX]FLAGS that we allow in strip-flags
60 vapier 1.22 ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -pipe -g"
61     case "${ARCH}" in
62     mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
63 tester 1.23 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
64 agriffis 1.25 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
65 vapier 1.22 esac
66 verwilst 1.13
67 azarah 1.17 # C[XX]FLAGS that we are think is ok, but needs testing
68     # NOTE: currently -Os have issues with gcc3 and K6* arch's
69     UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
70 aliz 1.24
71     filter-mfpmath() {
72     for a in $CFLAGS; do
73     if [ "${a:0:8}" == "-mfpmath" ]; then
74     orig_mfpmath=$a
75     fi
76     done
77    
78     mfpmath="$( echo $orig_mfpmath | awk -F '=' '{print $2}' | tr "," " " )"
79     for b in $@; do
80     mfpmath="${mfpmath/$b}"
81     done
82    
83     if [ -z "${mfpmath/ }" ]; then
84     filter-flags "$orig_mfpmath"
85     else
86     new_mfpmath="-mfpmath=$( echo $mfpmath | sed -e "s/ /,/g" -e "s/,,/,/g" )"
87     replace-flags "$orig_mfpmath" "$new_mfpmath"
88     fi
89     }
90 verwilst 1.13
91 vapier 1.18 filter-flags() {
92 solar 1.27 # we do two loops to avoid the first and last char from being chomped.
93     for x in $@ ; do
94     case "${x}" in
95     -fPIC) etexec-flags;;
96     -fstack-protector) fstack-flags;;
97     *) ;;
98     esac
99     done
100 vapier 1.18 # we do this fancy spacing stuff so as to not filter
101     # out part of a flag ... we want flag atoms ! :D
102 agriffis 1.25 CFLAGS=" ${CFLAGS} "
103     CXXFLAGS=" ${CXXFLAGS} "
104 vapier 1.18 for x in $@ ; do
105 agriffis 1.25 CFLAGS="${CFLAGS/ ${x} / }"
106     CXXFLAGS="${CXXFLAGS/ ${x} / }"
107 verwilst 1.1 done
108 agriffis 1.25 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}"
109     CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}"
110 verwilst 1.2 }
111    
112 vapier 1.18 append-flags() {
113 vapier 1.19 CFLAGS="${CFLAGS} $@"
114     CXXFLAGS="${CXXFLAGS} $@"
115 solar 1.27 for x in $@; do
116 vapier 1.28 [ "${x}" = "-fno-stack-protector" ] && fstack-flags
117 solar 1.27 done
118 vapier 1.28 return 0
119 verwilst 1.1 }
120    
121 vapier 1.18 replace-flags() {
122 seemant 1.9 CFLAGS="${CFLAGS/${1}/${2} }"
123     CXXFLAGS="${CXXFLAGS/${1}/${2} }"
124 vapier 1.28 return 0
125 danarmak 1.7 }
126    
127     is-flag() {
128 vapier 1.18 for x in ${CFLAGS} ${CXXFLAGS} ; do
129     if [ "${x}" == "$1" ] ; then
130 azarah 1.8 echo true
131 vapier 1.18 return 0
132     fi
133 danarmak 1.7 done
134 vapier 1.18 return 1
135 verwilst 1.1 }
136 azarah 1.8
137     strip-flags() {
138     local NEW_CFLAGS=""
139     local NEW_CXXFLAGS=""
140    
141 azarah 1.17 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
142 vapier 1.20 if [ `has ~${ARCH} ${ACCEPT_KEYWORDS}` ] ; then
143     [ `use debug` ] && einfo "Enabling the use of some unstable flags"
144 azarah 1.17 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
145     fi
146    
147 azarah 1.8 set -f
148    
149     for x in ${CFLAGS}
150     do
151     for y in ${ALLOWED_FLAGS}
152     do
153 lostlogic 1.14 flag=${x%%=*}
154     if [ "${flag%%${y}}" = "" ]
155 azarah 1.8 then
156 lostlogic 1.14 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
157     break
158 azarah 1.8 fi
159     done
160     done
161    
162     for x in ${CXXFLAGS}
163     do
164     for y in ${ALLOWED_FLAGS}
165     do
166 lostlogic 1.14 flag=${x%%=*}
167     if [ "${flag%%${y}}" = "" ]
168 azarah 1.8 then
169 lostlogic 1.14 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
170     break
171 azarah 1.8 fi
172     done
173     done
174    
175     set +f
176    
177 vapier 1.20 [ `use debug` ] \
178     && einfo "CFLAGS=\"${NEW_CFLAGS}\"" \
179     && einfo "CXXFLAGS=\"${NEW_CXXFLAGS}\""
180    
181 azarah 1.8 export CFLAGS="${NEW_CFLAGS}"
182     export CXXFLAGS="${NEW_CXXFLAGS}"
183 puggy 1.29 }
184    
185     test_flag () {
186     if gcc -S -xc $1 -o /dev/null /dev/null >/dev/null 2>&1; then
187     echo "$1"
188     fi
189     }
190    
191     strip-unsupported-flags() {
192     for x in ${CFLAGS}
193     do
194     NEW_CFLAGS=${NEW_CFLAGS}" ""`test_flag ${x}`"
195     done
196    
197     for x in ${CXXFLAGS}
198     do
199     NEW_CXXFLAGS=${NEW_CXXFLAGS}" ""`test_flag ${x}`"
200     done
201    
202     CFLAGS="${NEW_CFLAGS}"
203     CXXFLAGS="${NEW_CXXFLAGS}"
204 azarah 1.8 }
205    
206 vapier 1.10 get-flag() {
207     local findflag="$1"
208     for f in ${CFLAGS} ${CXXFLAGS} ; do
209     if [ "${f/${findflag}}" != "${f}" ] ; then
210     echo "${f/-${findflag}=}"
211 vapier 1.28 return 0
212 vapier 1.10 fi
213     done
214 vapier 1.28 return 1
215 joker 1.16 }
216    
217 vapier 1.18 replace-sparc64-flags() {
218 joker 1.16 local SPARC64_CPUS="ultrasparc v9"
219    
220     if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]
221     then
222     for x in ${SPARC64_CPUS}
223     do
224     CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
225     done
226     else
227     for x in ${SPARC64_CPUS}
228     do
229     CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
230     done
231     fi
232    
233     if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]
234     then
235     for x in ${SPARC64_CPUS}
236     do
237     CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
238     done
239     else
240     for x in ${SPARC64_CPUS}
241     do
242     CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
243     done
244     fi
245 solar 1.27 }
246    
247     append-ldflags() {
248     LDFLAGS="${LDFLAGS} $@"
249 vapier 1.28 return 0
250 solar 1.27 }
251    
252     etexec-flags() {
253     has_version 'sys-devel/hardened-gcc' && {
254     debug-print ">>> appending flags -yet_exec"
255     append-flags -yet_exec
256     append-ldflags -yet_exec
257     }
258     }
259    
260     fstack-flags() {
261     has_version 'sys-devel/hardened-gcc' && {
262     debug-print ">>> appending flags -yno_propolice"
263     append-flags -yno_propolice
264     append-ldflags -yno_propolice
265     }
266 vapier 1.10 }

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