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Revision 1.79 Revision 1.174
1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2012 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 1.174 2012/06/05 02:07:44 dirtyepic 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# 18# Return all the flag variables that our high level funcs operate on.
16#### filter-flags <flags> #### 19all-flag-vars() {
17# Remove particular flags from C[XX]FLAGS 20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
18# Matches only complete flags 21}
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 22
74# C[XX]FLAGS that we allow in strip-flags 23# {C,CXX,F,FC}FLAGS that we allow in strip-flags
24# Note: shell globs and character lists are allowed
75setup-allowed-flags() { 25setup-allowed-flags() {
76 if [ -z "${ALLOWED_FLAGS}" ] ; then
77 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector" 28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
33 ALLOWED_FLAGS+=" -W* -w"
34
35 # allow a bunch of flags that negate features / control ABI
36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi=* \
49 -D* -U*"
50
51 # 4.5
52 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
53 # 4.6
54 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
55
56 export ALLOWED_FLAGS
57 return 0
58}
59
60# inverted filters for hardened compiler. This is trying to unpick
61# the hardened compiler defaults.
62_filter-hardened() {
63 local f
64 for f in "$@" ; do
82 case "${ARCH}" in 65 case "${f}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 66 # Ideally we should only concern ourselves with PIE flags,
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 67 # not -fPIC or -fpic, but too many places filter -fPIC without
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 68 # thinking about -fPIE.
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 69 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 70 gcc-specs-pie || continue
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;; 71 is-flagq -nopie || append-flags -nopie;;
89 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;; 72 -fstack-protector)
73 gcc-specs-ssp || continue
74 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
75 -fstack-protector-all)
76 gcc-specs-ssp-to-all || continue
77 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
78 -fno-strict-overflow)
79 gcc-specs-nostrict || continue
80 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
90 esac 81 esac
91 fi 82 done
92 # allow a bunch of flags that negate features / control ABI 83}
93 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 84
94 case "${ARCH}" in 85# Remove occurrences of strings from variable given in $1
95 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 86# Strings removed are matched as globs, so for example
87# '-O*' would remove -O1, -O2 etc.
88_filter-var() {
89 local f x var=$1 new=()
90 shift
91
92 for f in ${!var} ; do
93 for x in "$@" ; do
94 # Note this should work with globs like -O*
95 [[ ${f} == ${x} ]] && continue 2
96 done
97 new+=( "${f}" )
98 done
99 eval export ${var}=\""${new[*]}"\"
100}
101
102# @FUNCTION: filter-flags
103# @USAGE: <flags>
104# @DESCRIPTION:
105# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
106filter-flags() {
107 _filter-hardened "$@"
108 local v
109 for v in $(all-flag-vars) ; do
110 _filter-var ${v} "$@"
111 done
112 return 0
113}
114
115# @FUNCTION: filter-lfs-flags
116# @DESCRIPTION:
117# Remove flags that enable Large File Support.
118filter-lfs-flags() {
119 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
120 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
121 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
122 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
123 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
124 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
125}
126
127# @FUNCTION: filter-ldflags
128# @USAGE: <flags>
129# @DESCRIPTION:
130# Remove particular <flags> from LDFLAGS. Accepts shell globs.
131filter-ldflags() {
132 _filter-var LDFLAGS "$@"
133 return 0
134}
135
136# @FUNCTION: append-cppflags
137# @USAGE: <flags>
138# @DESCRIPTION:
139# Add extra <flags> to the current CPPFLAGS.
140append-cppflags() {
141 [[ $# -eq 0 ]] && return 0
142 export CPPFLAGS="${CPPFLAGS} $*"
143 return 0
144}
145
146# @FUNCTION: append-cflags
147# @USAGE: <flags>
148# @DESCRIPTION:
149# Add extra <flags> to the current CFLAGS.
150append-cflags() {
151 [[ $# -eq 0 ]] && return 0
152 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
153 return 0
154}
155
156# @FUNCTION: append-cxxflags
157# @USAGE: <flags>
158# @DESCRIPTION:
159# Add extra <flags> to the current CXXFLAGS.
160append-cxxflags() {
161 [[ $# -eq 0 ]] && return 0
162 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
163 return 0
164}
165
166# @FUNCTION: append-fflags
167# @USAGE: <flags>
168# @DESCRIPTION:
169# Add extra <flags> to the current {F,FC}FLAGS.
170append-fflags() {
171 [[ $# -eq 0 ]] && return 0
172 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
173 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
174 return 0
175}
176
177# @FUNCTION: append-lfs-flags
178# @DESCRIPTION:
179# Add flags that enable Large File Support.
180append-lfs-flags() {
181 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
182 # see comments in filter-lfs-flags func for meaning of these
183 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
184}
185
186# @FUNCTION: append-ldflags
187# @USAGE: <flags>
188# @DESCRIPTION:
189# Add extra <flags> to the current LDFLAGS.
190append-ldflags() {
191 [[ $# -eq 0 ]] && return 0
192 local flag
193 for flag in "$@"; do
194 [[ ${flag} == -l* ]] && \
195 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
196 done
197
198 export LDFLAGS="${LDFLAGS} $*"
199 return 0
200}
201
202# @FUNCTION: append-flags
203# @USAGE: <flags>
204# @DESCRIPTION:
205# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
206append-flags() {
207 [[ $# -eq 0 ]] && return 0
208 case " $* " in
209 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
210 *' '-L*|\
211 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
96 esac 212 esac
97 ALLOWED_FLAGS="${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" 213 append-cflags "$@"
98 214 append-cxxflags "$@"
99 # C[XX]FLAGS that we are think is ok, but needs testing 215 append-fflags "$@"
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 0 216 return 0
103} 217}
104 218
105filter-flags() { 219# @FUNCTION: replace-flags
106 local x f fset 220# @USAGE: <old> <new>
107 declare -a new_CFLAGS new_CXXFLAGS 221# @DESCRIPTION:
222# Replace the <old> flag with <new>. Accepts shell globs for <old>.
223replace-flags() {
224 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
108 225
109 for x in "$@" ; do 226 local f var new
110 case "${x}" in 227 for var in $(all-flag-vars) ; do
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 228 # Looping over the flags instead of using a global
118 # substitution ensures that we're working with flag atoms. 229 # substitution ensures that we're working with flag atoms.
119 # Otherwise globs like -O* have the potential to wipe out the 230 # Otherwise globs like -O* have the potential to wipe out the
120 # list of flags. 231 # list of flags.
232 new=()
121 for f in ${!fset}; do 233 for f in ${!var} ; do
122 for x in "$@"; 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
128 eval export ${fset}=\${new_${fset}\[*]}
129 done
130
131 return 0
132}
133
134filter-lfs-flags() {
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136}
137
138append-lfs-flags() {
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140}
141
142append-flags() {
143 export CFLAGS="${CFLAGS} $*"
144 export CXXFLAGS="${CXXFLAGS} $*"
145 [ -n "`is-flag -fno-stack-protector`" -o \
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
147 return 0
148}
149
150replace-flags() {
151 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS
153
154 for fset in CFLAGS CXXFLAGS; do
155 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms.
157 # Otherwise globs like -O* have the potential to wipe out the
158 # list of flags.
159 for f in ${!fset}; do
160 # Note this should work with globs like -O* 234 # Note this should work with globs like -O*
161 [[ ${f} == ${1} ]] && f=${2} 235 [[ ${f} == ${1} ]] && f=${2}
162 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 236 new+=( "${f}" )
163 done
164 eval export ${fset}=\${new_${fset}\[*]}
165 done 237 done
238 eval export ${var}=\""${new[*]}"\"
239 done
166 240
167 return 0 241 return 0
168} 242}
169 243
244# @FUNCTION: replace-cpu-flags
245# @USAGE: <old> <new>
246# @DESCRIPTION:
247# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
248# with flags that select the <new> cpu. Accepts shell globs for <old>.
170replace-cpu-flags() { 249replace-cpu-flags() {
171 local newcpu="$#" ; newcpu="${!newcpu}" 250 local newcpu="$#" ; newcpu="${!newcpu}"
172 while [ $# -gt 1 ] ; do 251 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on 252 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags 253 # ${oldcpu}) prior to calling replace-flags
175 replace-flags "-march=${1}" "-march=${newcpu}" 254 replace-flags "-march=${1}" "-march=${newcpu}"
176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 255 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 256 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift 257 shift
179 done 258 done
180 return 0 259 return 0
181} 260}
182 261
262_is_flagq() {
263 local x
264 for x in ${!1} ; do
265 [[ ${x} == $2 ]] && return 0
266 done
267 return 1
268}
269
270# @FUNCTION: is-flagq
271# @USAGE: <flag>
272# @DESCRIPTION:
273# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
274is-flagq() {
275 [[ -n $2 ]] && die "Usage: is-flag <flag>"
276
277 local var
278 for var in $(all-flag-vars) ; do
279 _is_flagq ${var} "$1" && return 0
280 done
281 return 1
282}
283
284# @FUNCTION: is-flag
285# @USAGE: <flag>
286# @DESCRIPTION:
287# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
183is-flag() { 288is-flag() {
184 local x 289 is-flagq "$@" && 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} 290}
195 291
292# @FUNCTION: is-ldflagq
293# @USAGE: <flag>
294# @DESCRIPTION:
295# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
296is-ldflagq() {
297 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
298 _is_flagq LDFLAGS $1
299}
300
301# @FUNCTION: is-ldflag
302# @USAGE: <flag>
303# @DESCRIPTION:
304# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
305is-ldflag() {
306 is-ldflagq "$@" && echo true
307}
308
309# @FUNCTION: filter-mfpmath
310# @USAGE: <math types>
311# @DESCRIPTION:
312# Remove specified math types from the fpmath flag. For example, if the user
313# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
314# -mfpmath=386.
196filter-mfpmath() { 315filter-mfpmath() {
197 local orig_mfpmath new_math prune_math 316 local orig_mfpmath new_math prune_math
198 317
199 # save the original -mfpmath flag 318 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`" 319 orig_mfpmath=$(get-flag -mfpmath)
201 # get the value of the current -mfpmath flag 320 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` " 321 new_math=$(get-flag mfpmath)
322 new_math=" ${new_math//,/ } "
203 # figure out which math values are to be removed 323 # figure out which math values are to be removed
204 prune_math="" 324 prune_math=""
205 for prune_math in "$@" ; do 325 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }" 326 new_math=${new_math/ ${prune_math} / }
207 done 327 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 328 new_math=$(echo ${new_math})
329 new_math=${new_math// /,}
209 330
210 if [ -z "${new_math}" ] ; then 331 if [[ -z ${new_math} ]] ; then
211 # if we're removing all user specified math values are 332 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag 333 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath} 334 filter-flags ${orig_mfpmath}
214 else 335 else
215 # if we only want to filter some of the user specified 336 # if we only want to filter some of the user specified
217 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 338 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218 fi 339 fi
219 return 0 340 return 0
220} 341}
221 342
343# @FUNCTION: strip-flags
344# @DESCRIPTION:
345# Strip C[XX]FLAGS of everything except known good/safe flags.
222strip-flags() { 346strip-flags() {
223 local x y flag NEW_CFLAGS NEW_CXXFLAGS 347 local x y var
224 348
225 setup-allowed-flags 349 setup-allowed-flags
226 350
227 local NEW_CFLAGS=""
228 local NEW_CXXFLAGS=""
229
230 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
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
236 set -f # disable pathname expansion 351 set -f # disable pathname expansion
237 352
238 for x in ${CFLAGS}; do 353 for var in $(all-flag-vars) ; do
354 local new=()
355
356 for x in ${!var} ; do
357 local flag=${x%%=*}
239 for y in ${ALLOWED_FLAGS}; do 358 for y in ${ALLOWED_FLAGS} ; do
240 flag=${x%%=*}
241 if [ "${flag%%${y}}" = "" ] ; then 359 if [[ -z ${flag%%${y}} ]] ; then
242 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 360 new+=( "${x}" )
243 break 361 break
244 fi 362 fi
245 done 363 done
246 done 364 done
247 365
248 for x in ${CXXFLAGS}; do
249 for y in ${ALLOWED_FLAGS}; do
250 flag=${x%%=*}
251 if [ "${flag%%${y}}" = "" ] ; then
252 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
253 break
254 fi
255 done
256 done
257
258 # In case we filtered out all optimization flags fallback to -O2 366 # In case we filtered out all optimization flags fallback to -O2
259 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 367 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
260 NEW_CFLAGS="${NEW_CFLAGS} -O2" 368 new+=( -O2 )
261 fi 369 fi
262 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 370
263 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 371 eval export ${var}=\""${new[*]}"\"
264 fi 372 done
265 373
266 set +f # re-enable pathname expansion 374 set +f # re-enable pathname expansion
267 375
268 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}"
270 return 0
271}
272
273test_flag() {
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
275 printf "%s\n" "$*"
276 return 0 376 return 0
277 fi
278 return 1
279} 377}
280 378
379test-flag-PROG() {
380 local comp=$1
381 local flag=$2
382
383 [[ -z ${comp} || -z ${flag} ]] && return 1
384
385 # use -c so we can test the assembler as well
386 local PROG=$(tc-get${comp})
387 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
388 > /dev/null 2>&1
389}
390
391# @FUNCTION: test-flag-CC
392# @USAGE: <flag>
393# @DESCRIPTION:
394# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
395test-flag-CC() { test-flag-PROG "CC" "$1"; }
396
397# @FUNCTION: test-flag-CXX
398# @USAGE: <flag>
399# @DESCRIPTION:
400# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
401test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
402
403# @FUNCTION: test-flag-F77
404# @USAGE: <flag>
405# @DESCRIPTION:
406# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
407test-flag-F77() { test-flag-PROG "F77" "$1"; }
408
409# @FUNCTION: test-flag-FC
410# @USAGE: <flag>
411# @DESCRIPTION:
412# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
413test-flag-FC() { test-flag-PROG "FC" "$1"; }
414
415test-flags-PROG() {
416 local comp=$1
417 local flags
418 local x
419
420 shift
421
422 [[ -z ${comp} ]] && return 1
423
424 for x in "$@" ; do
425 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
426 done
427
428 echo "${flags}"
429
430 # Just bail if we dont have any flags
431 [[ -n ${flags} ]]
432}
433
434# @FUNCTION: test-flags-CC
435# @USAGE: <flags>
436# @DESCRIPTION:
437# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
438test-flags-CC() { test-flags-PROG "CC" "$@"; }
439
440# @FUNCTION: test-flags-CXX
441# @USAGE: <flags>
442# @DESCRIPTION:
443# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
444test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
445
446# @FUNCTION: test-flags-F77
447# @USAGE: <flags>
448# @DESCRIPTION:
449# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
450test-flags-F77() { test-flags-PROG "F77" "$@"; }
451
452# @FUNCTION: test-flags-FC
453# @USAGE: <flags>
454# @DESCRIPTION:
455# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
456test-flags-FC() { test-flags-PROG "FC" "$@"; }
457
458# @FUNCTION: test-flags
459# @USAGE: <flags>
460# @DESCRIPTION:
461# Short-hand that should hopefully work for both C and C++ compiler, but
462# its really only present due to the append-flags() abomination.
463test-flags() { test-flags-CC "$@"; }
464
465# @FUNCTION: test_version_info
466# @USAGE: <version>
467# @DESCRIPTION:
468# Returns shell true if the current C compiler version matches <version>, else returns shell false.
469# Accepts shell globs.
281test_version_info() { 470test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 471 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 472 return 0
284 else 473 else
285 return 1 474 return 1
286 fi 475 fi
287} 476}
288 477
478# @FUNCTION: strip-unsupported-flags
479# @DESCRIPTION:
480# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
289strip-unsupported-flags() { 481strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 482 export CFLAGS=$(test-flags-CC ${CFLAGS})
291 483 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
292 for x in ${CFLAGS} ; do 484 export FFLAGS=$(test-flags-F77 ${FFLAGS})
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 485 export FCFLAGS=$(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} 486}
302 487
488# @FUNCTION: get-flag
489# @USAGE: <flag>
490# @DESCRIPTION:
491# Find and echo the value for a particular flag. Accepts shell globs.
303get-flag() { 492get-flag() {
304 local f findflag="$1" 493 local f var findflag="$1"
305 494
306 # this code looks a little flaky but seems to work for 495 # this code looks a little flaky but seems to work for
307 # everything we want ... 496 # everything we want ...
308 # for example, if CFLAGS="-march=i686": 497 # for example, if CFLAGS="-march=i686":
309 # `get-flag -march` == "-march=i686" 498 # `get-flag -march` == "-march=i686"
310 # `get-flag march` == "i686" 499 # `get-flag march` == "i686"
311 for f in ${CFLAGS} ${CXXFLAGS} ; do 500 for var in $(all-flag-vars) ; do
501 for f in ${!var} ; do
312 if [ "${f/${findflag}}" != "${f}" ] ; then 502 if [ "${f/${findflag}}" != "${f}" ] ; then
313 printf "%s\n" "${f/-${findflag}=}" 503 printf "%s\n" "${f/-${findflag}=}"
314 return 0 504 return 0
315 fi 505 fi
506 done
316 done 507 done
317 return 1 508 return 1
318} 509}
319 510
320has_hardened() { 511# @FUNCTION: has_m64
321 test_version_info Hardened && return 0 512# @DESCRIPTION:
322 # the specs file wont exist unless gcc has GCC_SPECS support 513# This doesn't test if the flag is accepted, it tests if the flag actually
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 514# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
324 return 0 515# 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() { 516has_m64() {
517 eqawarn "${FUNCNAME}: don't use this anymore"
518
349 # this doesnt test if the flag is accepted, it tests if the flag 519 # this doesnt test if the flag is accepted, it tests if the flag
350 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 520 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
351 # please dont replace this function with test_flag in some future 521 # please dont replace this function with test_flag in some future
352 # clean-up! 522 # clean-up!
523
353 local temp="$(emktemp)" 524 local temp="$(emktemp)"
354 echo "int main() { return(0); }" > ${temp}.c 525 echo "int main() { return(0); }" > "${temp}".c
355 MY_CC=$(tc-getCC) 526 MY_CC=$(tc-getCC)
356 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 527 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
357 local ret=$? 528 local ret=$?
358 rm -f ${temp}.c 529 rm -f "${temp}".c
359 [ "$ret" != "1" ] && return 0 530 [[ ${ret} != 1 ]] && return 0
360 return 1 531 return 1
361} 532}
362 533
363has_m32() { 534has_m32() {
364 # this doesnt test if the flag is accepted, it tests if the flag 535 die "${FUNCNAME}: don't use this anymore"
365 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
366 # please dont replace this function with test_flag in some future
367 # clean-up!
368 local temp="$(emktemp)"
369 echo "int main() { return(0); }" > ${temp}.c
370 MY_CC=$(tc-getCC)
371 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
372 local ret=$?
373 rm -f ${temp}.c
374 [ "$ret" != "1" ] && return 0
375 return 1
376} 536}
377 537
538# @FUNCTION: replace-sparc64-flags
539# @DESCRIPTION:
540# Sets mcpu to v8 and uses the original value as mtune if none specified.
378replace-sparc64-flags() { 541replace-sparc64-flags() {
379 local SPARC64_CPUS="ultrasparc v9" 542 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
380 543
381 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 544 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
382 for x in ${SPARC64_CPUS}; do 545 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 546 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
384 done 547 done
385 else 548 else
386 for x in ${SPARC64_CPUS}; do 549 for x in ${SPARC64_CPUS}; do
387 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 550 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
388 done 551 done
389 fi 552 fi
390 553
391 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 554 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
392 for x in ${SPARC64_CPUS}; do 555 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 556 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
394 done 557 done
395 else 558 else
396 for x in ${SPARC64_CPUS}; do 559 for x in ${SPARC64_CPUS}; do
397 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 560 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
398 done 561 done
399 fi 562 fi
400 563
401 export CFLAGS CXXFLAGS 564 export CFLAGS CXXFLAGS
402} 565}
403 566
567# @FUNCTION: append-libs
568# @USAGE: <libs>
569# @DESCRIPTION:
570# Add extra <libs> to the current LIBS.
404append-ldflags() { 571append-libs() {
405 export LDFLAGS="${LDFLAGS} $*" 572 [[ $# -eq 0 ]] && return 0
406 return 0 573 local flag
407}
408
409filter-ldflags() {
410 local x
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 574 for flag in "$@"; do
416 LDFLAGS="${LDFLAGS// ${x} / }" 575 [[ ${flag} == -l* ]] && flag=${flag#-l}
576 export LIBS="${LIBS} -l${flag}"
417 done 577 done
418 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
419 export LDFLAGS
420 return 0
421}
422 578
423etexec-flags() {
424 # if you're not using a hardened compiler you wont need this
425 # PIC/no-pic kludge in the first place.
426 has_hardened || return 0
427 use amd64 && return 0
428 use mips && return 0
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 0 579 return 0
437} 580}
438 581
439fstack-flags() { 582# @FUNCTION: raw-ldflags
440 if has_ssp; then 583# @USAGE: [flags]
441 [ -z "`is-flag -fno-stack-protector`" ] && 584# @DESCRIPTION:
442 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 585# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
443 fi 586# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
444 return 0 587# to gcc where it needs the '-Wl,'.
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# 588#
451# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 589# If no flags are specified, then default to ${LDFLAGS}.
452gcc2-flags() { 590raw-ldflags() {
453 CFLAGS=${CFLAGS//pentium-mmx/i586} 591 local x input="$@"
454 CFLAGS=${CFLAGS//pentium[234]/i686} 592 [[ -z ${input} ]] && input=${LDFLAGS}
455 CFLAGS=${CFLAGS//k6-[23]/k6} 593 set --
456 CFLAGS=${CFLAGS//athlon-tbird/i686} 594 for x in ${input} ; do
457 CFLAGS=${CFLAGS//athlon-4/i686} 595 x=${x#-Wl,}
458 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 596 set -- "$@" ${x//,/ }
459 CFLAGS=${CFLAGS//athlon/i686} 597 done
598 echo "$@"
599}
460 600
461 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 601# @FUNCTION: no-as-needed
462 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 602# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
463 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 603no-as-needed() {
464 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 604 case $($(tc-getLD) -v 2>&1 </dev/null) in
465 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 605 *GNU*) # GNU ld
466 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 606 echo "-Wl,--no-as-needed" ;;
467 CXXFLAGS=${CXXFLAGS//athlon/i686} 607 esac
608}
468 609
469 if [ "$ARCH" = alpha ]; then
470 CHOST=${CHOST/#alphaev6[78]/alphaev6}
471 CFLAGS=${CFLAGS//ev6[78]/ev6}
472 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
473 fi 610fi
474
475 export CFLAGS CXXFLAGS
476}

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