/[gentoo-x86]/eclass/flag-o-matic.eclass
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1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2004 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.62 2004/07/15 04:59:44 lv Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.69 2004/09/14 02:06:36 lv Exp $
4# 4#
5# Author Bart Verwilst <verwilst@gentoo.org> 5# Author Bart Verwilst <verwilst@gentoo.org>
6 6
7ECLASS=flag-o-matic 7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS" 8INHERITED="$INHERITED $ECLASS"
9
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
9IUSE="$IUSE debug" 12IUSE="${IUSE} debug"
10 13
11# 14#
12#### filter-flags <flags> #### 15#### filter-flags <flags> ####
13# Remove particular flags from C[XX]FLAGS 16# Remove particular flags from C[XX]FLAGS
14# Matches only complete flags 17# Matches only complete flags
68# 71#
69 72
70# C[XX]FLAGS that we allow in strip-flags 73# C[XX]FLAGS that we allow in strip-flags
71setup-allowed-flags() { 74setup-allowed-flags() {
72 if [ -z "${ALLOWED_FLAGS}" ] ; then 75 if [ -z "${ALLOWED_FLAGS}" ] ; then
73 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-unit-at-a-time -pipe -g" 76 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g"
74 case "${ARCH}" in 77 case "${ARCH}" in
75 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;; 78 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mabi" ;;
76 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 79 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;;
77 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 80 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;;
78 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 81 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
79 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 82 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
80 esac 83 esac
81 fi 84 fi
85 # allow a bunch of flags that negate features / control ABI
86 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
87 case "${ARCH}" in
88 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
89 esac
90 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
82 91
83 # C[XX]FLAGS that we are think is ok, but needs testing 92 # C[XX]FLAGS that we are think is ok, but needs testing
84 # NOTE: currently -Os have issues with gcc3 and K6* arch's 93 # NOTE: currently -Os have issues with gcc3 and K6* arch's
85 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 94 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
86 return 0 95 return 0
96 -fstack-protector|-fstack-protector-all) fstack-flags;; 105 -fstack-protector|-fstack-protector-all) fstack-flags;;
97 esac 106 esac
98 done 107 done
99 108
100 for fset in CFLAGS CXXFLAGS; do 109 for fset in CFLAGS CXXFLAGS; do
110 # Looping over the flags instead of using a global
111 # substitution ensures that we're working with flag atoms.
112 # Otherwise globs like -O* have the potential to wipe out the
113 # list of flags.
101 for f in ${!fset}; do 114 for f in ${!fset}; do
102 for x in "$@"; do 115 for x in "$@"; do
103 # Note this should work with globs like -O* 116 # Note this should work with globs like -O*
104 [[ ${f} == ${x} ]] && continue 2 117 [[ ${f} == ${x} ]] && continue 2
105 done 118 done
126 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 139 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
127 return 0 140 return 0
128} 141}
129 142
130replace-flags() { 143replace-flags() {
131 # we do this fancy spacing stuff so as to not filter 144 local f fset
132 # out part of a flag ... we want flag atoms ! :D 145 declare -a new_CFLAGS new_CXXFLAGS
133 CFLAGS=" ${CFLAGS} " 146
134 CXXFLAGS=" ${CXXFLAGS} " 147 for fset in CFLAGS CXXFLAGS; do
135 CFLAGS="${CFLAGS// ${1} / ${2} }" 148 # Looping over the flags instead of using a global
136 CXXFLAGS="${CXXFLAGS// ${1} / ${2} }" 149 # substitution ensures that we're working with flag atoms.
137 CFLAGS="${CFLAGS:1:${#CFLAGS}-2}" 150 # Otherwise globs like -O* have the potential to wipe out the
138 CXXFLAGS="${CXXFLAGS:1:${#CXXFLAGS}-2}" 151 # list of flags.
139 export CFLAGS CXXFLAGS 152 for f in ${!fset}; do
153 # Note this should work with globs like -O*
154 [[ ${f} == ${1} ]] && f=${2}
155 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
156 done
157 eval export ${fset}=\${new_${fset}\[*]}
158 done
159
140 return 0 160 return 0
141} 161}
142 162
143replace-cpu-flags() { 163replace-cpu-flags() {
144 local oldcpu newcpu="$1" ; shift 164 local oldcpu newcpu="$1" ; shift
145 for oldcpu in "$@" ; do 165 for oldcpu in "$@" ; do
166 # quote to make sure that no globbing is done (particularly on
167 # ${oldcpu} prior to calling replace-flags
146 replace-flags -march=${oldcpu} -march=${newcpu} 168 replace-flags "-march=${oldcpu}" "-march=${newcpu}"
147 replace-flags -mcpu=${oldcpu} -mcpu=${newcpu} 169 replace-flags "-mcpu=${oldcpu}" "-mcpu=${newcpu}"
148 replace-flags -mtune=${oldcpu} -mtune=${newcpu} 170 replace-flags "-mtune=${oldcpu}" "-mtune=${newcpu}"
149 done 171 done
150 return 0 172 return 0
151} 173}
152 174
153is-flag() { 175is-flag() {
154 local x 176 local x
155 177
156 for x in ${CFLAGS} ${CXXFLAGS} ; do 178 for x in ${CFLAGS} ${CXXFLAGS} ; do
179 # Note this should work with globs like -mcpu=ultrasparc*
157 if [ "${x}" == "$1" ] ; then 180 if [[ ${x} == ${1} ]]; then
158 echo true 181 echo true
159 return 0 182 return 0
160 fi 183 fi
161 done 184 done
162 return 1 185 return 1
205 set -f # disable pathname expansion 228 set -f # disable pathname expansion
206 229
207 for x in ${CFLAGS}; do 230 for x in ${CFLAGS}; do
208 for y in ${ALLOWED_FLAGS}; do 231 for y in ${ALLOWED_FLAGS}; do
209 flag=${x%%=*} 232 flag=${x%%=*}
210 if [ "${flag%%${y}}" = "" ]; then 233 if [ "${flag%%${y}}" = "" ] ; then
211 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 234 NEW_CFLAGS="${NEW_CFLAGS} ${x}"
212 break 235 break
213 fi 236 fi
214 done 237 done
215 done 238 done
216 239
217 for x in ${CXXFLAGS}; do 240 for x in ${CXXFLAGS}; do
218 for y in ${ALLOWED_FLAGS}; do 241 for y in ${ALLOWED_FLAGS}; do
219 flag=${x%%=*} 242 flag=${x%%=*}
220 if [ "${flag%%${y}}" = "" ]; then 243 if [ "${flag%%${y}}" = "" ] ; then
221 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}" 244 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
222 break 245 break
223 fi 246 fi
224 done 247 done
225 done 248 done
287 done 310 done
288 return 1 311 return 1
289} 312}
290 313
291has_hardened() { 314has_hardened() {
292 test_version_info Hardened 315 test_version_info Hardened && return 0
316 # the specs file wont exist unless gcc has GCC_SPECS support
317 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \
318 return 0
293 return $? 319 return 1
294} 320}
295 321
296has_pic() { 322has_pic() {
297 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 323 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
298 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 324 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
388 414
389etexec-flags() { 415etexec-flags() {
390 # if you're not using a hardened compiler you wont need this 416 # if you're not using a hardened compiler you wont need this
391 # PIC/no-pic kludge in the first place. 417 # PIC/no-pic kludge in the first place.
392 has_hardened || return 0 418 has_hardened || return 0
419 # this kludge breaks on amd64, and probably other -fPIC dependant
420 # archs.
421 use amd64 && return 0
393 422
394 if has_pie || has_pic; then 423 if has_pie || has_pic; then
395 [ -z "`is-flag -fno-pic`" ] && 424 [ -z "`is-flag -fno-pic`" ] &&
396 export CFLAGS="${CFLAGS} `test_flag -fno-pic`" 425 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
397 [ -z "`is-flag -nopie`" ] && 426 [ -z "`is-flag -nopie`" ] &&

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