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Revision 1.79 Revision 1.165
1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2011 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 1.79 2004/12/25 18:45:56 chriswhite Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.165 2012/01/14 08:05:32 vapier Exp $
4#
5# Author Bart Verwilst <verwilst@gentoo.org>
6 4
7ECLASS=flag-o-matic 5# @ECLASS: flag-o-matic.eclass
8INHERITED="$INHERITED $ECLASS" 6# @MAINTAINER:
7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
9 12
10IUSE="debug" 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
11 15
12# need access to emktemp()
13inherit eutils toolchain-funcs 16inherit eutils toolchain-funcs multilib
14 17
15#
16#### filter-flags <flags> ####
17# Remove particular flags from C[XX]FLAGS
18# Matches only complete flags
19#
20#### append-flags <flags> ####
21# Add extra flags to your current C[XX]FLAGS
22#
23#### replace-flags <orig.flag> <new.flag> ###
24# Replace a flag by another one
25#
26#### replace-cpu-flags <old.cpus> <new.cpu> ###
27# Replace march/mcpu flags that specify <old.cpus>
28# with flags that specify <new.cpu>
29#
30#### is-flag <flag> ####
31# Returns "true" if flag is set in C[XX]FLAGS
32# Matches only complete a flag
33#
34#### strip-flags ####
35# Strip C[XX]FLAGS of everything except known
36# good options.
37#
38#### strip-unsupported-flags ####
39# Strip C[XX]FLAGS of any flags not supported by
40# installed version of gcc
41#
42#### get-flag <flag> ####
43# Find and echo the value for a particular flag
44#
45#### replace-sparc64-flags ####
46# Sets mcpu to v8 and uses the original value
47# as mtune if none specified.
48#
49#### filter-mfpmath <math types> ####
50# Remove specified math types from the fpmath specification
51# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52# will leave the user with -mfpmath=386
53#
54#### append-ldflags ####
55# Add extra flags to your current LDFLAGS
56#
57#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS
59# Matches only complete flags
60#
61#### etexec-flags ####
62# hooked function for hardened gcc that appends
63# -fno-pic to {C,CXX,LD}FLAGS
64# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
65#
66#### fstack-flags ####
67# hooked function for hardened gcc that appends
68# -fno-stack-protector to {C,CXX,LD}FLAGS
69# when a package is filtering -fstack-protector, -fstack-protector-all
70# notice: modern automatic specs files will also suppress -fstack-protector-all
71# when only -fno-stack-protector is given
72#
73
74# C[XX]FLAGS that we allow in strip-flags 18# {C,CXX,F,FC}FLAGS that we allow in strip-flags
19# Note: shell globs and character lists are allowed
75setup-allowed-flags() { 20setup-allowed-flags() {
76 if [ -z "${ALLOWED_FLAGS}" ] ; then
77 export ALLOWED_FLAGS="-pipe" 21 ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 22 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector" 23 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 24 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 25 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
26 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
27 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
28 ALLOWED_FLAGS+=" -W* -w"
29
30 # allow a bunch of flags that negate features / control ABI
31 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
32 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
33 -fno-omit-frame-pointer"
34 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
35 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
36 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
37 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
38 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
39 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
40 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
41 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
42 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
43 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
44
45 # 4.5
46 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
47 # 4.6
48 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
49
50 export ALLOWED_FLAGS
51 return 0
52}
53
54# inverted filters for hardened compiler. This is trying to unpick
55# the hardened compiler defaults.
56_filter-hardened() {
57 local f
58 for f in "$@" ; do
82 case "${ARCH}" in 59 case "${f}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 60 # Ideally we should only concern ourselves with PIE flags,
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 61 # not -fPIC or -fpic, but too many places filter -fPIC without
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 62 # thinking about -fPIE.
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 63 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 64 gcc-specs-pie || continue
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;; 65 is-flagq -nopie || append-flags -nopie;;
89 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;; 66 -fstack-protector)
67 gcc-specs-ssp || continue
68 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
69 -fstack-protector-all)
70 gcc-specs-ssp-to-all || continue
71 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
72 -fno-strict-overflow)
73 gcc-specs-nostrict || continue
74 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
90 esac 75 esac
91 fi 76 done
92 # allow a bunch of flags that negate features / control ABI
93 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
94 case "${ARCH}" in
95 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
96 esac
97 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"
98
99 # C[XX]FLAGS that we are think is ok, but needs testing
100 # NOTE: currently -Os have issues with gcc3 and K6* arch's
101 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
102 return 0
103} 77}
104 78
79# Remove occurrences of strings from variable given in $1
80# Strings removed are matched as globs, so for example
81# '-O*' would remove -O1, -O2 etc.
82_filter-var() {
83 local f x VAR VAL
84 declare -a new
85
86 VAR=$1
87 shift
88 eval VAL=\${${VAR}}
89 for f in ${VAL}; do
90 for x in "$@"; do
91 # Note this should work with globs like -O*
92 [[ ${f} == ${x} ]] && continue 2
93 done
94 eval new\[\${\#new\[@]}]=\${f}
95 done
96 eval export ${VAR}=\${new\[*]}
97}
98
99# @FUNCTION: filter-flags
100# @USAGE: <flags>
101# @DESCRIPTION:
102# Remove particular <flags> from {C,CPP,CXX,F,FC,LD}FLAGS. Accepts shell globs.
105filter-flags() { 103filter-flags() {
106 local x f fset 104 _filter-hardened "$@"
107 declare -a new_CFLAGS new_CXXFLAGS 105 local v
108 106 for v in C CPP CXX F FC LD ; do
109 for x in "$@" ; do 107 _filter-var ${v}FLAGS "$@"
110 case "${x}" in
111 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
112 -fstack-protector|-fstack-protector-all) fstack-flags;;
113 esac
114 done
115
116 for fset in CFLAGS CXXFLAGS; do
117 # Looping over the flags instead of using a global
118 # substitution ensures that we're working with flag atoms.
119 # Otherwise globs like -O* have the potential to wipe out the
120 # list of flags.
121 for f in ${!fset}; do
122 for x in "$@"; do
123 # Note this should work with globs like -O*
124 [[ ${f} == ${x} ]] && continue 2
125 done
126 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
127 done 108 done
128 eval export ${fset}=\${new_${fset}\[*]}
129 done
130
131 return 0 109 return 0
132} 110}
133 111
112# @FUNCTION: filter-lfs-flags
113# @DESCRIPTION:
114# Remove flags that enable Large File Support.
134filter-lfs-flags() { 115filter-lfs-flags() {
116 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
117 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
118 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
119 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
120 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 121 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 122}
137 123
124# @FUNCTION: append-cppflags
125# @USAGE: <flags>
126# @DESCRIPTION:
127# Add extra <flags> to the current CPPFLAGS.
128append-cppflags() {
129 [[ $# -eq 0 ]] && return 0
130 export CPPFLAGS="${CPPFLAGS} $*"
131 return 0
132}
133
134# @FUNCTION: append-cflags
135# @USAGE: <flags>
136# @DESCRIPTION:
137# Add extra <flags> to the current CFLAGS.
138append-cflags() {
139 [[ $# -eq 0 ]] && return 0
140 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
141 return 0
142}
143
144# @FUNCTION: append-cxxflags
145# @USAGE: <flags>
146# @DESCRIPTION:
147# Add extra <flags> to the current CXXFLAGS.
148append-cxxflags() {
149 [[ $# -eq 0 ]] && return 0
150 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
151 return 0
152}
153
154# @FUNCTION: append-fflags
155# @USAGE: <flags>
156# @DESCRIPTION:
157# Add extra <flags> to the current {F,FC}FLAGS.
158append-fflags() {
159 [[ $# -eq 0 ]] && return 0
160 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
161 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
162 return 0
163}
164
165# @FUNCTION: append-lfs-flags
166# @DESCRIPTION:
167# Add flags that enable Large File Support.
138append-lfs-flags() { 168append-lfs-flags() {
169 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
170 # see comments in filter-lfs-flags func for meaning of these
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 171 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140} 172}
141 173
174# @FUNCTION: append-flags
175# @USAGE: <flags>
176# @DESCRIPTION:
177# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
142append-flags() { 178append-flags() {
143 export CFLAGS="${CFLAGS} $*" 179 [[ $# -eq 0 ]] && return 0
144 export CXXFLAGS="${CXXFLAGS} $*" 180 append-cflags "$@"
145 [ -n "`is-flag -fno-stack-protector`" -o \ 181 append-cxxflags "$@"
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 182 append-fflags "$@"
147 return 0 183 return 0
148} 184}
149 185
186# @FUNCTION: replace-flags
187# @USAGE: <old> <new>
188# @DESCRIPTION:
189# Replace the <old> flag with <new>. Accepts shell globs for <old>.
150replace-flags() { 190replace-flags() {
191 [[ $# != 2 ]] \
192 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
193 && die "replace-flags takes 2 arguments, not $#"
194
151 local f fset 195 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS 196 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
153 197
154 for fset in CFLAGS CXXFLAGS; do 198 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
155 # Looping over the flags instead of using a global 199 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms. 200 # substitution ensures that we're working with flag atoms.
157 # Otherwise globs like -O* have the potential to wipe out the 201 # Otherwise globs like -O* have the potential to wipe out the
158 # list of flags. 202 # list of flags.
159 for f in ${!fset}; do 203 for f in ${!fset}; do
165 done 209 done
166 210
167 return 0 211 return 0
168} 212}
169 213
214# @FUNCTION: replace-cpu-flags
215# @USAGE: <old> <new>
216# @DESCRIPTION:
217# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
218# with flags that select the <new> cpu. Accepts shell globs for <old>.
170replace-cpu-flags() { 219replace-cpu-flags() {
171 local newcpu="$#" ; newcpu="${!newcpu}" 220 local newcpu="$#" ; newcpu="${!newcpu}"
172 while [ $# -gt 1 ] ; do 221 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on 222 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags 223 # ${oldcpu}) prior to calling replace-flags
175 replace-flags "-march=${1}" "-march=${newcpu}" 224 replace-flags "-march=${1}" "-march=${newcpu}"
176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 225 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 226 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift 227 shift
179 done 228 done
180 return 0 229 return 0
181} 230}
182 231
232_is_flagq() {
233 local x
234 for x in ${!1} ; do
235 [[ ${x} == $2 ]] && return 0
236 done
237 return 1
238}
239
240# @FUNCTION: is-flagq
241# @USAGE: <flag>
242# @DESCRIPTION:
243# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
244is-flagq() {
245 [[ -n $2 ]] && die "Usage: is-flag <flag>"
246 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
247}
248
249# @FUNCTION: is-flag
250# @USAGE: <flag>
251# @DESCRIPTION:
252# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
183is-flag() { 253is-flag() {
184 local x 254 is-flagq "$@" && echo true
185
186 for x in ${CFLAGS} ${CXXFLAGS} ; do
187 # Note this should work with globs like -mcpu=ultrasparc*
188 if [[ ${x} == ${1} ]]; then
189 echo true
190 return 0
191 fi
192 done
193 return 1
194} 255}
195 256
257# @FUNCTION: is-ldflagq
258# @USAGE: <flag>
259# @DESCRIPTION:
260# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
261is-ldflagq() {
262 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
263 _is_flagq LDFLAGS $1
264}
265
266# @FUNCTION: is-ldflag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
270is-ldflag() {
271 is-ldflagq "$@" && echo true
272}
273
274# @FUNCTION: filter-mfpmath
275# @USAGE: <math types>
276# @DESCRIPTION:
277# Remove specified math types from the fpmath flag. For example, if the user
278# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
279# -mfpmath=386.
196filter-mfpmath() { 280filter-mfpmath() {
197 local orig_mfpmath new_math prune_math 281 local orig_mfpmath new_math prune_math
198 282
199 # save the original -mfpmath flag 283 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`" 284 orig_mfpmath=$(get-flag -mfpmath)
201 # get the value of the current -mfpmath flag 285 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` " 286 new_math=$(get-flag mfpmath)
287 new_math=" ${new_math//,/ } "
203 # figure out which math values are to be removed 288 # figure out which math values are to be removed
204 prune_math="" 289 prune_math=""
205 for prune_math in "$@" ; do 290 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }" 291 new_math=${new_math/ ${prune_math} / }
207 done 292 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 293 new_math=$(echo ${new_math})
294 new_math=${new_math// /,}
209 295
210 if [ -z "${new_math}" ] ; then 296 if [[ -z ${new_math} ]] ; then
211 # if we're removing all user specified math values are 297 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag 298 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath} 299 filter-flags ${orig_mfpmath}
214 else 300 else
215 # if we only want to filter some of the user specified 301 # if we only want to filter some of the user specified
217 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 303 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218 fi 304 fi
219 return 0 305 return 0
220} 306}
221 307
308# @FUNCTION: strip-flags
309# @DESCRIPTION:
310# Strip C[XX]FLAGS of everything except known good/safe flags.
222strip-flags() { 311strip-flags() {
223 local x y flag NEW_CFLAGS NEW_CXXFLAGS 312 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
224 313
225 setup-allowed-flags 314 setup-allowed-flags
226 315
227 local NEW_CFLAGS="" 316 local NEW_CFLAGS=""
228 local NEW_CXXFLAGS="" 317 local NEW_CXXFLAGS=""
229 318 local NEW_FFLAGS=""
230 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 319 local NEW_FCFLAGS=""
231 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
232 use debug && einfo "Enabling the use of some unstable flags"
233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
234 fi
235 320
236 set -f # disable pathname expansion 321 set -f # disable pathname expansion
237 322
238 for x in ${CFLAGS}; do 323 for x in ${CFLAGS}; do
239 for y in ${ALLOWED_FLAGS}; do 324 for y in ${ALLOWED_FLAGS}; do
253 break 338 break
254 fi 339 fi
255 done 340 done
256 done 341 done
257 342
343 for x in ${FFLAGS}; do
344 for y in ${ALLOWED_FLAGS}; do
345 flag=${x%%=*}
346 if [ "${flag%%${y}}" = "" ] ; then
347 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
348 break
349 fi
350 done
351 done
352
353 for x in ${FCFLAGS}; do
354 for y in ${ALLOWED_FLAGS}; do
355 flag=${x%%=*}
356 if [ "${flag%%${y}}" = "" ] ; then
357 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
358 break
359 fi
360 done
361 done
362
258 # In case we filtered out all optimization flags fallback to -O2 363 # In case we filtered out all optimization flags fallback to -O2
259 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 364 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
260 NEW_CFLAGS="${NEW_CFLAGS} -O2" 365 NEW_CFLAGS="${NEW_CFLAGS} -O2"
261 fi 366 fi
262 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 367 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
263 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 368 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
264 fi 369 fi
370 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
371 NEW_FFLAGS="${NEW_FFLAGS} -O2"
372 fi
373 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
375 fi
265 376
266 set +f # re-enable pathname expansion 377 set +f # re-enable pathname expansion
267 378
268 export CFLAGS="${NEW_CFLAGS}" 379 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}" 380 export CXXFLAGS="${NEW_CXXFLAGS}"
270 return 0 381 export FFLAGS="${NEW_FFLAGS}"
271} 382 export FCFLAGS="${NEW_FCFLAGS}"
272
273test_flag() {
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
275 printf "%s\n" "$*"
276 return 0 383 return 0
277 fi
278 return 1
279} 384}
280 385
386test-flag-PROG() {
387 local comp=$1
388 local flags="$2"
389
390 [[ -z ${comp} || -z ${flags} ]] && return 1
391
392 # use -c so we can test the assembler as well
393 local PROG=$(tc-get${comp})
394 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
395 > /dev/null 2>&1
396}
397
398# @FUNCTION: test-flag-CC
399# @USAGE: <flag>
400# @DESCRIPTION:
401# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
402test-flag-CC() { test-flag-PROG "CC" "$1"; }
403
404# @FUNCTION: test-flag-CXX
405# @USAGE: <flag>
406# @DESCRIPTION:
407# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
408test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
409
410# @FUNCTION: test-flag-F77
411# @USAGE: <flag>
412# @DESCRIPTION:
413# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
414test-flag-F77() { test-flag-PROG "F77" "$1"; }
415
416# @FUNCTION: test-flag-FC
417# @USAGE: <flag>
418# @DESCRIPTION:
419# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
420test-flag-FC() { test-flag-PROG "FC" "$1"; }
421
422test-flags-PROG() {
423 local comp=$1
424 local flags
425 local x
426
427 shift
428
429 [[ -z ${comp} ]] && return 1
430
431 for x in "$@" ; do
432 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
433 done
434
435 echo "${flags}"
436
437 # Just bail if we dont have any flags
438 [[ -n ${flags} ]]
439}
440
441# @FUNCTION: test-flags-CC
442# @USAGE: <flags>
443# @DESCRIPTION:
444# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
445test-flags-CC() { test-flags-PROG "CC" "$@"; }
446
447# @FUNCTION: test-flags-CXX
448# @USAGE: <flags>
449# @DESCRIPTION:
450# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
451test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
452
453# @FUNCTION: test-flags-F77
454# @USAGE: <flags>
455# @DESCRIPTION:
456# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
457test-flags-F77() { test-flags-PROG "F77" "$@"; }
458
459# @FUNCTION: test-flags-FC
460# @USAGE: <flags>
461# @DESCRIPTION:
462# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
463test-flags-FC() { test-flags-PROG "FC" "$@"; }
464
465# @FUNCTION: test-flags
466# @USAGE: <flags>
467# @DESCRIPTION:
468# Short-hand that should hopefully work for both C and C++ compiler, but
469# its really only present due to the append-flags() abomination.
470test-flags() { test-flags-CC "$@"; }
471
472# @FUNCTION: test_version_info
473# @USAGE: <version>
474# @DESCRIPTION:
475# Returns shell true if the current C compiler version matches <version>, else returns shell false.
476# Accepts shell globs.
281test_version_info() { 477test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 478 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 479 return 0
284 else 480 else
285 return 1 481 return 1
286 fi 482 fi
287} 483}
288 484
485# @FUNCTION: strip-unsupported-flags
486# @DESCRIPTION:
487# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
289strip-unsupported-flags() { 488strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 489 export CFLAGS=$(test-flags-CC ${CFLAGS})
291 490 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
292 for x in ${CFLAGS} ; do 491 export FFLAGS=$(test-flags-F77 ${FFLAGS})
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 492 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
294 done
295 for x in ${CXXFLAGS} ; do
296 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
297 done
298
299 export CFLAGS="${NEW_CFLAGS}"
300 export CXXFLAGS="${NEW_CXXFLAGS}"
301} 493}
302 494
495# @FUNCTION: get-flag
496# @USAGE: <flag>
497# @DESCRIPTION:
498# Find and echo the value for a particular flag. Accepts shell globs.
303get-flag() { 499get-flag() {
304 local f findflag="$1" 500 local f findflag="$1"
305 501
306 # this code looks a little flaky but seems to work for 502 # this code looks a little flaky but seems to work for
307 # everything we want ... 503 # everything we want ...
308 # for example, if CFLAGS="-march=i686": 504 # for example, if CFLAGS="-march=i686":
309 # `get-flag -march` == "-march=i686" 505 # `get-flag -march` == "-march=i686"
310 # `get-flag march` == "i686" 506 # `get-flag march` == "i686"
311 for f in ${CFLAGS} ${CXXFLAGS} ; do 507 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
312 if [ "${f/${findflag}}" != "${f}" ] ; then 508 if [ "${f/${findflag}}" != "${f}" ] ; then
313 printf "%s\n" "${f/-${findflag}=}" 509 printf "%s\n" "${f/-${findflag}=}"
314 return 0 510 return 0
315 fi 511 fi
316 done 512 done
317 return 1 513 return 1
318} 514}
319 515
320has_hardened() { 516# @FUNCTION: has_m64
321 test_version_info Hardened && return 0 517# @DESCRIPTION:
322 # the specs file wont exist unless gcc has GCC_SPECS support 518# This doesn't test if the flag is accepted, it tests if the flag actually
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 519# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
324 return 0 520# return code is 0, else the return code is 1.
325 return 1
326}
327
328has_pic() {
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331 test_version_info pie && return 0
332 return 1
333}
334
335has_pie() {
336 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
337 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
338 test_version_info pie && return 0
339 return 1
340}
341
342has_ssp() {
343 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
344 test_version_info ssp && return 0
345 return 1
346}
347
348has_m64() { 521has_m64() {
349 # this doesnt test if the flag is accepted, it tests if the flag 522 # this doesnt test if the flag is accepted, it tests if the flag
350 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 523 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
351 # please dont replace this function with test_flag in some future 524 # please dont replace this function with test_flag in some future
352 # clean-up! 525 # clean-up!
526
353 local temp="$(emktemp)" 527 local temp="$(emktemp)"
354 echo "int main() { return(0); }" > ${temp}.c 528 echo "int main() { return(0); }" > "${temp}".c
355 MY_CC=$(tc-getCC) 529 MY_CC=$(tc-getCC)
356 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 530 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
357 local ret=$? 531 local ret=$?
358 rm -f ${temp}.c 532 rm -f "${temp}".c
359 [ "$ret" != "1" ] && return 0 533 [[ ${ret} != 1 ]] && return 0
360 return 1 534 return 1
361} 535}
362 536
537# @FUNCTION: has_m32
538# @DESCRIPTION:
539# This doesn't test if the flag is accepted, it tests if the flag actually
540# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
541# code is 0, else return code is 1.
363has_m32() { 542has_m32() {
364 # this doesnt test if the flag is accepted, it tests if the flag 543 # this doesnt test if the flag is accepted, it tests if the flag
365 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 544 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
366 # please dont replace this function with test_flag in some future 545 # please dont replace this function with test_flag in some future
367 # clean-up! 546 # clean-up!
547
548 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
549
368 local temp="$(emktemp)" 550 local temp=$(emktemp)
369 echo "int main() { return(0); }" > ${temp}.c 551 echo "int main() { return(0); }" > "${temp}".c
370 MY_CC=$(tc-getCC) 552 MY_CC=$(tc-getCC)
371 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 553 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
372 local ret=$? 554 local ret=$?
373 rm -f ${temp}.c 555 rm -f "${temp}".c
374 [ "$ret" != "1" ] && return 0 556 [[ ${ret} != 1 ]] && return 0
375 return 1 557 return 1
376} 558}
377 559
560# @FUNCTION: replace-sparc64-flags
561# @DESCRIPTION:
562# Sets mcpu to v8 and uses the original value as mtune if none specified.
378replace-sparc64-flags() { 563replace-sparc64-flags() {
379 local SPARC64_CPUS="ultrasparc v9" 564 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
380 565
381 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 566 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
382 for x in ${SPARC64_CPUS}; do 567 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 568 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
384 done 569 done
385 else 570 else
386 for x in ${SPARC64_CPUS}; do 571 for x in ${SPARC64_CPUS}; do
387 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 572 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
388 done 573 done
389 fi 574 fi
390 575
391 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 576 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
392 for x in ${SPARC64_CPUS}; do 577 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 578 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
394 done 579 done
395 else 580 else
396 for x in ${SPARC64_CPUS}; do 581 for x in ${SPARC64_CPUS}; do
397 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 582 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
398 done 583 done
399 fi 584 fi
400 585
401 export CFLAGS CXXFLAGS 586 export CFLAGS CXXFLAGS
402} 587}
403 588
589# @FUNCTION: append-libs
590# @USAGE: <libs>
591# @DESCRIPTION:
592# Add extra <libs> to the current LIBS.
593append-libs() {
594 [[ $# -eq 0 ]] && return 0
595 local flag
596 for flag in "$@"; do
597 [[ ${flag} == -l* ]] && flag=${flag#-l}
598 export LIBS="${LIBS} -l${flag}"
599 done
600
601 return 0
602}
603
604# @FUNCTION: append-ldflags
605# @USAGE: <flags>
606# @DESCRIPTION:
607# Add extra <flags> to the current LDFLAGS.
404append-ldflags() { 608append-ldflags() {
609 [[ $# -eq 0 ]] && return 0
610 local flag
611 for flag in "$@"; do
612 [[ ${flag} == -l* ]] && \
613 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
614 done
615
405 export LDFLAGS="${LDFLAGS} $*" 616 export LDFLAGS="${LDFLAGS} $*"
406 return 0 617 return 0
407} 618}
408 619
620# @FUNCTION: filter-ldflags
621# @USAGE: <flags>
622# @DESCRIPTION:
623# Remove particular <flags> from LDFLAGS. Accepts shell globs.
409filter-ldflags() { 624filter-ldflags() {
410 local x 625 _filter-var LDFLAGS "$@"
411
412 # we do this fancy spacing stuff so as to not filter
413 # out part of a flag ... we want flag atoms ! :D
414 LDFLAGS=" ${LDFLAGS} "
415 for x in "$@" ; do
416 LDFLAGS="${LDFLAGS// ${x} / }"
417 done
418 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
419 export LDFLAGS
420 return 0 626 return 0
421} 627}
422 628
423etexec-flags() { 629# @FUNCTION: raw-ldflags
424 # if you're not using a hardened compiler you wont need this 630# @USAGE: [flags]
425 # PIC/no-pic kludge in the first place. 631# @DESCRIPTION:
426 has_hardened || return 0 632# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
427 use amd64 && return 0 633# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
428 use mips && return 0 634# to gcc where it needs the '-Wl,'.
429
430 if has_pie || has_pic; then
431 [ -z "`is-flag -fno-pic`" ] &&
432 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
433 [ -z "`is-flag -nopie`" ] &&
434 export CFLAGS="${CFLAGS} `test_flag -nopie`"
435 fi
436 return 0
437}
438
439fstack-flags() {
440 if has_ssp; then
441 [ -z "`is-flag -fno-stack-protector`" ] &&
442 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
443 fi
444 return 0
445}
446
447# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
448# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
449# fixes.
450# 635#
451# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 636# If no flags are specified, then default to ${LDFLAGS}.
452gcc2-flags() { 637raw-ldflags() {
453 CFLAGS=${CFLAGS//pentium-mmx/i586} 638 local x input="$@"
454 CFLAGS=${CFLAGS//pentium[234]/i686} 639 [[ -z ${input} ]] && input=${LDFLAGS}
455 CFLAGS=${CFLAGS//k6-[23]/k6} 640 set --
456 CFLAGS=${CFLAGS//athlon-tbird/i686} 641 for x in ${input} ; do
457 CFLAGS=${CFLAGS//athlon-4/i686} 642 x=${x#-Wl,}
458 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 643 set -- "$@" ${x//,/ }
459 CFLAGS=${CFLAGS//athlon/i686} 644 done
645 echo "$@"
646}
460 647
461 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 648# @FUNCTION: no-as-needed
462 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 649# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
463 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 650no-as-needed() {
464 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 651 case $($(tc-getLD) -v 2>&1 </dev/null) in
465 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 652 *GNU*) # GNU ld
466 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 653 echo "-Wl,--no-as-needed" ;;
467 CXXFLAGS=${CXXFLAGS//athlon/i686} 654 esac
655}
468 656
469 if [ "$ARCH" = alpha ]; then
470 CHOST=${CHOST/#alphaev6[78]/alphaev6}
471 CFLAGS=${CFLAGS//ev6[78]/ev6}
472 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
473 fi 657fi
474
475 export CFLAGS CXXFLAGS
476}

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