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Revision 1.73 Revision 1.169
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 1.73 2004/10/13 14:11:52 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.169 2012/02/26 12:09:44 blueness 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
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
11# IUSE gets clobbered. 14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
12IUSE="${IUSE} debug"
13 15
14# need access to emktemp() 16inherit eutils toolchain-funcs multilib
15inherit eutils
16 17
17# 18# Return all the flag variables that our high level funcs operate on.
18#### filter-flags <flags> #### 19all-flag-vars() {
19# Remove particular flags from C[XX]FLAGS 20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
20# Matches only complete flags 21}
21#
22#### append-flags <flags> ####
23# Add extra flags to your current C[XX]FLAGS
24#
25#### replace-flags <orig.flag> <new.flag> ###
26# Replace a flag by another one
27#
28#### replace-cpu-flags <old.cpus> <new.cpu> ###
29# Replace march/mcpu flags that specify <old.cpus>
30# with flags that specify <new.cpu>
31#
32#### is-flag <flag> ####
33# Returns "true" if flag is set in C[XX]FLAGS
34# Matches only complete a flag
35#
36#### strip-flags ####
37# Strip C[XX]FLAGS of everything except known
38# good options.
39#
40#### strip-unsupported-flags ####
41# Strip C[XX]FLAGS of any flags not supported by
42# installed version of gcc
43#
44#### get-flag <flag> ####
45# Find and echo the value for a particular flag
46#
47#### replace-sparc64-flags ####
48# Sets mcpu to v8 and uses the original value
49# as mtune if none specified.
50#
51#### filter-mfpmath <math types> ####
52# Remove specified math types from the fpmath specification
53# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
54# will leave the user with -mfpmath=386
55#
56#### append-ldflags ####
57# Add extra flags to your current LDFLAGS
58#
59#### filter-ldflags <flags> ####
60# Remove particular flags from LDFLAGS
61# Matches only complete flags
62#
63#### etexec-flags ####
64# hooked function for hardened gcc that appends
65# -fno-pic to {C,CXX,LD}FLAGS
66# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
67#
68#### fstack-flags ####
69# hooked function for hardened gcc that appends
70# -fno-stack-protector to {C,CXX,LD}FLAGS
71# when a package is filtering -fstack-protector, -fstack-protector-all
72# notice: modern automatic specs files will also suppress -fstack-protector-all
73# when only -fno-stack-protector is given
74#
75 22
76# 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
77setup-allowed-flags() { 25setup-allowed-flags() {
78 if [ -z "${ALLOWED_FLAGS}" ] ; then 26 ALLOWED_FLAGS="-pipe"
79 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
33 ALLOWED_FLAGS+=" -W* -w"
34
35 # allow a bunch of flags that negate features / control ABI
36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -D* -U*"
49
50 # 4.5
51 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
52 # 4.6
53 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
54
55 export ALLOWED_FLAGS
56 return 0
57}
58
59# inverted filters for hardened compiler. This is trying to unpick
60# the hardened compiler defaults.
61_filter-hardened() {
62 local f
63 for f in "$@" ; do
80 case "${ARCH}" in 64 case "${f}" in
81 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 65 # Ideally we should only concern ourselves with PIE flags,
82 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 66 # not -fPIC or -fpic, but too many places filter -fPIC without
83 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 67 # thinking about -fPIE.
84 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 68 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
85 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 69 gcc-specs-pie || continue
70 is-flagq -nopie || append-flags -nopie;;
71 -fstack-protector)
72 gcc-specs-ssp || continue
73 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
74 -fstack-protector-all)
75 gcc-specs-ssp-to-all || continue
76 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
77 -fno-strict-overflow)
78 gcc-specs-nostrict || continue
79 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
86 esac 80 esac
87 fi 81 done
88 # allow a bunch of flags that negate features / control ABI
89 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
90 case "${ARCH}" in
91 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
92 esac
93 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"
94
95 # C[XX]FLAGS that we are think is ok, but needs testing
96 # NOTE: currently -Os have issues with gcc3 and K6* arch's
97 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
98 return 0
99} 82}
100 83
84# Remove occurrences of strings from variable given in $1
85# Strings removed are matched as globs, so for example
86# '-O*' would remove -O1, -O2 etc.
87_filter-var() {
88 local f x var=$1 new=()
89 shift
90
91 for f in ${!var} ; do
92 for x in "$@" ; do
93 # Note this should work with globs like -O*
94 [[ ${f} == ${x} ]] && continue 2
95 done
96 new+=( "${f}" )
97 done
98 eval export ${var}=\""${new[*]}"\"
99}
100
101# @FUNCTION: filter-flags
102# @USAGE: <flags>
103# @DESCRIPTION:
104# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
101filter-flags() { 105filter-flags() {
102 local x f fset 106 _filter-hardened "$@"
103 declare -a new_CFLAGS new_CXXFLAGS 107 local v
104 108 for v in $(all-flag-vars) ; do
105 for x in "$@" ; do 109 _filter-var ${v} "$@"
106 case "${x}" in
107 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
108 -fstack-protector|-fstack-protector-all) fstack-flags;;
109 esac
110 done 110 done
111 return 0
112}
111 113
112 for fset in CFLAGS CXXFLAGS; do 114# @FUNCTION: filter-lfs-flags
115# @DESCRIPTION:
116# Remove flags that enable Large File Support.
117filter-lfs-flags() {
118 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
119 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
120 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
121 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
122 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
124}
125
126# @FUNCTION: append-cppflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Add extra <flags> to the current CPPFLAGS.
130append-cppflags() {
131 [[ $# -eq 0 ]] && return 0
132 export CPPFLAGS="${CPPFLAGS} $*"
133 return 0
134}
135
136# @FUNCTION: append-cflags
137# @USAGE: <flags>
138# @DESCRIPTION:
139# Add extra <flags> to the current CFLAGS.
140append-cflags() {
141 [[ $# -eq 0 ]] && return 0
142 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
143 return 0
144}
145
146# @FUNCTION: append-cxxflags
147# @USAGE: <flags>
148# @DESCRIPTION:
149# Add extra <flags> to the current CXXFLAGS.
150append-cxxflags() {
151 [[ $# -eq 0 ]] && return 0
152 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
153 return 0
154}
155
156# @FUNCTION: append-fflags
157# @USAGE: <flags>
158# @DESCRIPTION:
159# Add extra <flags> to the current {F,FC}FLAGS.
160append-fflags() {
161 [[ $# -eq 0 ]] && return 0
162 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
163 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
164 return 0
165}
166
167# @FUNCTION: append-lfs-flags
168# @DESCRIPTION:
169# Add flags that enable Large File Support.
170append-lfs-flags() {
171 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
172 # see comments in filter-lfs-flags func for meaning of these
173 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
174}
175
176# @FUNCTION: append-flags
177# @USAGE: <flags>
178# @DESCRIPTION:
179# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
180append-flags() {
181 [[ $# -eq 0 ]] && return 0
182 append-cflags "$@"
183 append-cxxflags "$@"
184 append-fflags "$@"
185 return 0
186}
187
188# @FUNCTION: replace-flags
189# @USAGE: <old> <new>
190# @DESCRIPTION:
191# Replace the <old> flag with <new>. Accepts shell globs for <old>.
192replace-flags() {
193 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
194
195 local f var new
196 for var in $(all-flag-vars) ; do
113 # Looping over the flags instead of using a global 197 # Looping over the flags instead of using a global
114 # substitution ensures that we're working with flag atoms. 198 # substitution ensures that we're working with flag atoms.
115 # Otherwise globs like -O* have the potential to wipe out the 199 # Otherwise globs like -O* have the potential to wipe out the
116 # list of flags. 200 # list of flags.
201 new=()
117 for f in ${!fset}; do 202 for f in ${!var} ; do
118 for x in "$@"; do
119 # Note this should work with globs like -O*
120 [[ ${f} == ${x} ]] && continue 2
121 done
122 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
123 done
124 eval export ${fset}=\${new_${fset}\[*]}
125 done
126
127 return 0
128}
129
130filter-lfs-flags() {
131 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
132}
133
134append-lfs-flags() {
135 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136}
137
138append-flags() {
139 export CFLAGS="${CFLAGS} $*"
140 export CXXFLAGS="${CXXFLAGS} $*"
141 [ -n "`is-flag -fno-stack-protector`" -o \
142 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
143 return 0
144}
145
146replace-flags() {
147 local f fset
148 declare -a new_CFLAGS new_CXXFLAGS
149
150 for fset in CFLAGS CXXFLAGS; do
151 # Looping over the flags instead of using a global
152 # substitution ensures that we're working with flag atoms.
153 # Otherwise globs like -O* have the potential to wipe out the
154 # list of flags.
155 for f in ${!fset}; do
156 # Note this should work with globs like -O* 203 # Note this should work with globs like -O*
157 [[ ${f} == ${1} ]] && f=${2} 204 [[ ${f} == ${1} ]] && f=${2}
158 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 205 new+=( "${f}" )
159 done
160 eval export ${fset}=\${new_${fset}\[*]}
161 done 206 done
207 eval export ${var}=\""${new[*]}"\"
208 done
162 209
163 return 0 210 return 0
164} 211}
165 212
213# @FUNCTION: replace-cpu-flags
214# @USAGE: <old> <new>
215# @DESCRIPTION:
216# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
217# with flags that select the <new> cpu. Accepts shell globs for <old>.
166replace-cpu-flags() { 218replace-cpu-flags() {
167 local newcpu="$#" ; newcpu="${!newcpu}" 219 local newcpu="$#" ; newcpu="${!newcpu}"
168 while [ $# -gt 1 ] ; do 220 while [ $# -gt 1 ] ; do
169 # quote to make sure that no globbing is done (particularly on 221 # quote to make sure that no globbing is done (particularly on
170 # ${oldcpu} prior to calling replace-flags 222 # ${oldcpu}) prior to calling replace-flags
171 replace-flags "-march=${1}" "-march=${newcpu}" 223 replace-flags "-march=${1}" "-march=${newcpu}"
172 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 224 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
173 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 225 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
174 shift 226 shift
175 done 227 done
176 return 0 228 return 0
177} 229}
178 230
231_is_flagq() {
232 local x
233 for x in ${!1} ; do
234 [[ ${x} == $2 ]] && return 0
235 done
236 return 1
237}
238
239# @FUNCTION: is-flagq
240# @USAGE: <flag>
241# @DESCRIPTION:
242# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
243is-flagq() {
244 [[ -n $2 ]] && die "Usage: is-flag <flag>"
245
246 local var
247 for var in $(all-flag-vars) ; do
248 _is_flagq ${var} "$1" && return 0
249 done
250 return 1
251}
252
253# @FUNCTION: is-flag
254# @USAGE: <flag>
255# @DESCRIPTION:
256# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
179is-flag() { 257is-flag() {
180 local x 258 is-flagq "$@" && echo true
181
182 for x in ${CFLAGS} ${CXXFLAGS} ; do
183 # Note this should work with globs like -mcpu=ultrasparc*
184 if [[ ${x} == ${1} ]]; then
185 echo true
186 return 0
187 fi
188 done
189 return 1
190} 259}
191 260
261# @FUNCTION: is-ldflagq
262# @USAGE: <flag>
263# @DESCRIPTION:
264# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
265is-ldflagq() {
266 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
267 _is_flagq LDFLAGS $1
268}
269
270# @FUNCTION: is-ldflag
271# @USAGE: <flag>
272# @DESCRIPTION:
273# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
274is-ldflag() {
275 is-ldflagq "$@" && echo true
276}
277
278# @FUNCTION: filter-mfpmath
279# @USAGE: <math types>
280# @DESCRIPTION:
281# Remove specified math types from the fpmath flag. For example, if the user
282# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
283# -mfpmath=386.
192filter-mfpmath() { 284filter-mfpmath() {
193 local orig_mfpmath new_math prune_math 285 local orig_mfpmath new_math prune_math
194 286
195 # save the original -mfpmath flag 287 # save the original -mfpmath flag
196 orig_mfpmath="`get-flag -mfpmath`" 288 orig_mfpmath=$(get-flag -mfpmath)
197 # get the value of the current -mfpmath flag 289 # get the value of the current -mfpmath flag
198 new_math=" `get-flag mfpmath | tr , ' '` " 290 new_math=$(get-flag mfpmath)
291 new_math=" ${new_math//,/ } "
199 # figure out which math values are to be removed 292 # figure out which math values are to be removed
200 prune_math="" 293 prune_math=""
201 for prune_math in "$@" ; do 294 for prune_math in "$@" ; do
202 new_math="${new_math/ ${prune_math} / }" 295 new_math=${new_math/ ${prune_math} / }
203 done 296 done
204 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 297 new_math=$(echo ${new_math})
298 new_math=${new_math// /,}
205 299
206 if [ -z "${new_math}" ] ; then 300 if [[ -z ${new_math} ]] ; then
207 # if we're removing all user specified math values are 301 # if we're removing all user specified math values are
208 # slated for removal, then we just filter the flag 302 # slated for removal, then we just filter the flag
209 filter-flags ${orig_mfpmath} 303 filter-flags ${orig_mfpmath}
210 else 304 else
211 # if we only want to filter some of the user specified 305 # if we only want to filter some of the user specified
213 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 307 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
214 fi 308 fi
215 return 0 309 return 0
216} 310}
217 311
312# @FUNCTION: strip-flags
313# @DESCRIPTION:
314# Strip C[XX]FLAGS of everything except known good/safe flags.
218strip-flags() { 315strip-flags() {
219 local x y flag NEW_CFLAGS NEW_CXXFLAGS 316 local x y var
220 317
221 setup-allowed-flags 318 setup-allowed-flags
222 319
223 local NEW_CFLAGS=""
224 local NEW_CXXFLAGS=""
225
226 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
227 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then
228 use debug && einfo "Enabling the use of some unstable flags"
229 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
230 fi
231
232 set -f # disable pathname expansion 320 set -f # disable pathname expansion
233 321
234 for x in ${CFLAGS}; do 322 for var in $(all-flag-vars) ; do
323 local new=()
324
325 for x in ${!var} ; do
326 local flag=${x%%=*}
235 for y in ${ALLOWED_FLAGS}; do 327 for y in ${ALLOWED_FLAGS} ; do
236 flag=${x%%=*}
237 if [ "${flag%%${y}}" = "" ] ; then 328 if [[ -z ${flag%%${y}} ]] ; then
238 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 329 new+=( "${x}" )
239 break 330 break
240 fi 331 fi
241 done 332 done
242 done 333 done
243 334
244 for x in ${CXXFLAGS}; do
245 for y in ${ALLOWED_FLAGS}; do
246 flag=${x%%=*}
247 if [ "${flag%%${y}}" = "" ] ; then
248 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
249 break
250 fi
251 done
252 done
253
254 # In case we filtered out all optimization flags fallback to -O2 335 # In case we filtered out all optimization flags fallback to -O2
255 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 336 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
256 NEW_CFLAGS="${NEW_CFLAGS} -O2" 337 new+=( -O2 )
257 fi 338 fi
258 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 339
259 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 340 eval export ${var}=\""${new[*]}"\"
260 fi 341 done
261 342
262 set +f # re-enable pathname expansion 343 set +f # re-enable pathname expansion
263 344
264 export CFLAGS="${NEW_CFLAGS}"
265 export CXXFLAGS="${NEW_CXXFLAGS}"
266 return 0
267}
268
269test_flag() {
270 local cc=${CC:-gcc} ; cc=${cc%% *}
271 if ${cc} -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
272 printf "%s\n" "$*"
273 return 0 345 return 0
274 fi
275 return 1
276} 346}
277 347
348test-flag-PROG() {
349 local comp=$1
350 local flag=$2
351
352 [[ -z ${comp} || -z ${flag} ]] && return 1
353
354 # use -c so we can test the assembler as well
355 local PROG=$(tc-get${comp})
356 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
357 > /dev/null 2>&1
358}
359
360# @FUNCTION: test-flag-CC
361# @USAGE: <flag>
362# @DESCRIPTION:
363# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
364test-flag-CC() { test-flag-PROG "CC" "$1"; }
365
366# @FUNCTION: test-flag-CXX
367# @USAGE: <flag>
368# @DESCRIPTION:
369# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
370test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
371
372# @FUNCTION: test-flag-F77
373# @USAGE: <flag>
374# @DESCRIPTION:
375# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
376test-flag-F77() { test-flag-PROG "F77" "$1"; }
377
378# @FUNCTION: test-flag-FC
379# @USAGE: <flag>
380# @DESCRIPTION:
381# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
382test-flag-FC() { test-flag-PROG "FC" "$1"; }
383
384test-flags-PROG() {
385 local comp=$1
386 local flags
387 local x
388
389 shift
390
391 [[ -z ${comp} ]] && return 1
392
393 for x in "$@" ; do
394 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
395 done
396
397 echo "${flags}"
398
399 # Just bail if we dont have any flags
400 [[ -n ${flags} ]]
401}
402
403# @FUNCTION: test-flags-CC
404# @USAGE: <flags>
405# @DESCRIPTION:
406# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
407test-flags-CC() { test-flags-PROG "CC" "$@"; }
408
409# @FUNCTION: test-flags-CXX
410# @USAGE: <flags>
411# @DESCRIPTION:
412# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
413test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
414
415# @FUNCTION: test-flags-F77
416# @USAGE: <flags>
417# @DESCRIPTION:
418# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
419test-flags-F77() { test-flags-PROG "F77" "$@"; }
420
421# @FUNCTION: test-flags-FC
422# @USAGE: <flags>
423# @DESCRIPTION:
424# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
425test-flags-FC() { test-flags-PROG "FC" "$@"; }
426
427# @FUNCTION: test-flags
428# @USAGE: <flags>
429# @DESCRIPTION:
430# Short-hand that should hopefully work for both C and C++ compiler, but
431# its really only present due to the append-flags() abomination.
432test-flags() { test-flags-CC "$@"; }
433
434# @FUNCTION: test_version_info
435# @USAGE: <version>
436# @DESCRIPTION:
437# Returns shell true if the current C compiler version matches <version>, else returns shell false.
438# Accepts shell globs.
278test_version_info() { 439test_version_info() {
279 local cc=${CC:-gcc} ; cc=${cc%% *}
280 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 440 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
281 return 0 441 return 0
282 else 442 else
283 return 1 443 return 1
284 fi 444 fi
285} 445}
286 446
447# @FUNCTION: strip-unsupported-flags
448# @DESCRIPTION:
449# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
287strip-unsupported-flags() { 450strip-unsupported-flags() {
288 local NEW_CFLAGS NEW_CXXFLAGS 451 export CFLAGS=$(test-flags-CC ${CFLAGS})
289 452 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
290 for x in ${CFLAGS} ; do 453 export FFLAGS=$(test-flags-F77 ${FFLAGS})
291 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 454 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
292 done
293 for x in ${CXXFLAGS} ; do
294 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
295 done
296
297 export CFLAGS="${NEW_CFLAGS}"
298 export CXXFLAGS="${NEW_CXXFLAGS}"
299} 455}
300 456
457# @FUNCTION: get-flag
458# @USAGE: <flag>
459# @DESCRIPTION:
460# Find and echo the value for a particular flag. Accepts shell globs.
301get-flag() { 461get-flag() {
302 local f findflag="$1" 462 local f var findflag="$1"
303 463
304 # this code looks a little flaky but seems to work for 464 # this code looks a little flaky but seems to work for
305 # everything we want ... 465 # everything we want ...
306 # for example, if CFLAGS="-march=i686": 466 # for example, if CFLAGS="-march=i686":
307 # `get-flag -march` == "-march=i686" 467 # `get-flag -march` == "-march=i686"
308 # `get-flag march` == "i686" 468 # `get-flag march` == "i686"
309 for f in ${CFLAGS} ${CXXFLAGS} ; do 469 for var in $(all-flag-vars) ; do
470 for f in ${!var} ; do
310 if [ "${f/${findflag}}" != "${f}" ] ; then 471 if [ "${f/${findflag}}" != "${f}" ] ; then
311 printf "%s\n" "${f/-${findflag}=}" 472 printf "%s\n" "${f/-${findflag}=}"
312 return 0 473 return 0
313 fi 474 fi
475 done
314 done 476 done
315 return 1 477 return 1
316} 478}
317 479
318has_hardened() { 480# @FUNCTION: has_m64
319 test_version_info Hardened && return 0 481# @DESCRIPTION:
320 # the specs file wont exist unless gcc has GCC_SPECS support 482# This doesn't test if the flag is accepted, it tests if the flag actually
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 483# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
322 return 0 484# return code is 0, else the return code is 1.
323 return 1
324}
325
326has_pic() {
327 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
328 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
329 test_version_info pie && return 0
330 return 1
331}
332
333has_pie() {
334 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
335 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
336 test_version_info pie && return 0
337 return 1
338}
339
340has_ssp() {
341 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
342 test_version_info ssp && return 0
343 return 1
344}
345
346has_m64() { 485has_m64() {
486 eqawarn "${FUNCNAME}: don't use this anymore"
487
347 # this doesnt test if the flag is accepted, it tests if the flag 488 # this doesnt test if the flag is accepted, it tests if the flag
348 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 489 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349 # please dont replace this function with test_flag in some future 490 # please dont replace this function with test_flag in some future
350 # clean-up! 491 # clean-up!
492
351 local temp="$(emktemp)" 493 local temp="$(emktemp)"
352 echo "int main() { return(0); }" > ${temp}.c 494 echo "int main() { return(0); }" > "${temp}".c
495 MY_CC=$(tc-getCC)
353 ${CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 496 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
354 local ret=$? 497 local ret=$?
355 rm -f ${temp}.c 498 rm -f "${temp}".c
356 [ "$ret" != "1" ] && return 0 499 [[ ${ret} != 1 ]] && return 0
357 return 1 500 return 1
358} 501}
359 502
360has_m32() { 503has_m32() {
361 # this doesnt test if the flag is accepted, it tests if the flag 504 die "${FUNCNAME}: don't use this anymore"
362 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
363 # please dont replace this function with test_flag in some future
364 # clean-up!
365 local temp="$(emktemp)"
366 echo "int main() { return(0); }" > ${temp}.c
367 ${CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
368 local ret=$?
369 rm -f ${temp}.c
370 [ "$ret" != "1" ] && return 0
371 return 1
372} 505}
373 506
507# @FUNCTION: replace-sparc64-flags
508# @DESCRIPTION:
509# Sets mcpu to v8 and uses the original value as mtune if none specified.
374replace-sparc64-flags() { 510replace-sparc64-flags() {
375 local SPARC64_CPUS="ultrasparc v9" 511 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
376 512
377 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 513 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
378 for x in ${SPARC64_CPUS}; do 514 for x in ${SPARC64_CPUS}; do
379 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 515 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
380 done 516 done
381 else 517 else
382 for x in ${SPARC64_CPUS}; do 518 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 519 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
384 done 520 done
385 fi 521 fi
386 522
387 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 523 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
388 for x in ${SPARC64_CPUS}; do 524 for x in ${SPARC64_CPUS}; do
389 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 525 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
390 done 526 done
391 else 527 else
392 for x in ${SPARC64_CPUS}; do 528 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 529 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
394 done 530 done
395 fi 531 fi
396 532
397 export CFLAGS CXXFLAGS 533 export CFLAGS CXXFLAGS
398} 534}
399 535
536# @FUNCTION: append-libs
537# @USAGE: <libs>
538# @DESCRIPTION:
539# Add extra <libs> to the current LIBS.
540append-libs() {
541 [[ $# -eq 0 ]] && return 0
542 local flag
543 for flag in "$@"; do
544 [[ ${flag} == -l* ]] && flag=${flag#-l}
545 export LIBS="${LIBS} -l${flag}"
546 done
547
548 return 0
549}
550
551# @FUNCTION: append-ldflags
552# @USAGE: <flags>
553# @DESCRIPTION:
554# Add extra <flags> to the current LDFLAGS.
400append-ldflags() { 555append-ldflags() {
556 [[ $# -eq 0 ]] && return 0
557 local flag
558 for flag in "$@"; do
559 [[ ${flag} == -l* ]] && \
560 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
561 done
562
401 export LDFLAGS="${LDFLAGS} $*" 563 export LDFLAGS="${LDFLAGS} $*"
402 return 0 564 return 0
403} 565}
404 566
567# @FUNCTION: filter-ldflags
568# @USAGE: <flags>
569# @DESCRIPTION:
570# Remove particular <flags> from LDFLAGS. Accepts shell globs.
405filter-ldflags() { 571filter-ldflags() {
406 local x 572 _filter-var LDFLAGS "$@"
407
408 # we do this fancy spacing stuff so as to not filter
409 # out part of a flag ... we want flag atoms ! :D
410 LDFLAGS=" ${LDFLAGS} "
411 for x in "$@" ; do
412 LDFLAGS="${LDFLAGS// ${x} / }"
413 done
414 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
415 export LDFLAGS
416 return 0 573 return 0
417} 574}
418 575
419etexec-flags() { 576# @FUNCTION: raw-ldflags
420 # if you're not using a hardened compiler you wont need this 577# @USAGE: [flags]
421 # PIC/no-pic kludge in the first place. 578# @DESCRIPTION:
422 has_hardened || return 0 579# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
423 # this kludge breaks on amd64, and probably other -fPIC dependant 580# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
424 # archs. 581# to gcc where it needs the '-Wl,'.
425 use amd64 && return 0
426
427 if has_pie || has_pic; then
428 [ -z "`is-flag -fno-pic`" ] &&
429 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
430 [ -z "`is-flag -nopie`" ] &&
431 export CFLAGS="${CFLAGS} `test_flag -nopie`"
432 fi
433 return 0
434}
435
436fstack-flags() {
437 if has_ssp; then
438 [ -z "`is-flag -fno-stack-protector`" ] &&
439 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
440 fi
441 return 0
442}
443
444# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
445# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
446# fixes.
447# 582#
448# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 583# If no flags are specified, then default to ${LDFLAGS}.
449gcc2-flags() { 584raw-ldflags() {
450 CFLAGS=${CFLAGS//pentium-mmx/i586} 585 local x input="$@"
451 CFLAGS=${CFLAGS//pentium[234]/i686} 586 [[ -z ${input} ]] && input=${LDFLAGS}
452 CFLAGS=${CFLAGS//k6-[23]/k6} 587 set --
453 CFLAGS=${CFLAGS//athlon-tbird/i686} 588 for x in ${input} ; do
454 CFLAGS=${CFLAGS//athlon-4/i686} 589 x=${x#-Wl,}
455 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 590 set -- "$@" ${x//,/ }
456 CFLAGS=${CFLAGS//athlon/i686} 591 done
592 echo "$@"
593}
457 594
458 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 595# @FUNCTION: no-as-needed
459 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 596# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
460 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 597no-as-needed() {
461 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 598 case $($(tc-getLD) -v 2>&1 </dev/null) in
462 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 599 *GNU*) # GNU ld
463 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 600 echo "-Wl,--no-as-needed" ;;
464 CXXFLAGS=${CXXFLAGS//athlon/i686} 601 esac
602}
465 603
466 if [ "$ARCH" = alpha ]; then
467 CHOST=${CHOST/#alphaev6[78]/alphaev6}
468 CFLAGS=${CFLAGS//ev6[78]/ev6}
469 CXXFLAGS=${CXXFLAGS//ev6[78]/ev6}
470 fi 604fi
471
472 export CFLAGS CXXFLAGS
473}

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