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1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2008 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 1.123 2008/06/07 16:42:32 flameeyes Exp $
4
5# @ECLASS: flag-o-matic.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.
12
13inherit eutils toolchain-funcs multilib
14
15################ DEPRECATED functions ################
16# The following are still present to avoid breaking existing
17# code more than necessary; however they are deprecated. Please
18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
19# need to know which hardened techs are active in the compiler.
20# See bug #100974
4# 21#
5# Author Bart Verwilst <verwilst@gentoo.org> 22# has_hardened
23# has_pie
24# has_pic
25# has_ssp_all
26# has_ssp
6 27
7ECLASS=flag-o-matic
8INHERITED="$INHERITED $ECLASS"
9
10# Please leave ${IUSE} in this until portage .51 is stable, otherwise
11# IUSE gets clobbered.
12IUSE="${IUSE} debug"
13
14# need access to emktemp()
15inherit eutils
16
17#
18#### filter-flags <flags> ####
19# Remove particular flags from C[XX]FLAGS
20# Matches only complete flags
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 28
76# C[XX]FLAGS that we allow in strip-flags 29# C[XX]FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed
77setup-allowed-flags() { 31setup-allowed-flags() {
78 if [ -z "${ALLOWED_FLAGS}" ] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
79 export ALLOWED_FLAGS="-O -O1 -O2 -mcpu -march -mtune -fstack-protector -fno-stack-protector -fno-pie -fno-unit-at-a-time -pipe -g" 33 export ALLOWED_FLAGS="-pipe"
80 case "${ARCH}" in 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
81 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
82 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking"
37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
83 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
84 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
85 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;;
86 esac
87 fi 41 fi
88 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
89 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
90 case "${ARCH}" in 44 -fno-strict-aliasing -fno-bounds-checking"
91 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;; 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
92 esac 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
93 ALLOWED_FLAGS="${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" 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -D*"
94 55
95 # C[XX]FLAGS that we are think is ok, but needs testing 56 # C[XX]FLAGS that we are think is ok, but needs testing
96 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
97 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
98 return 0 59 return 0
99} 60}
100 61
62# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults.
64_filter-hardened() {
65 local f
66 for f in "$@" ; do
67 case "${f}" in
68 # Ideally we should only concern ourselves with PIE flags,
69 # not -fPIC or -fpic, but too many places filter -fPIC without
70 # thinking about -fPIE.
71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
72 gcc-specs-pie || continue
73 is-flagq -nopie || append-flags -nopie;;
74 -fstack-protector)
75 gcc-specs-ssp || continue
76 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
77 -fstack-protector-all)
78 gcc-specs-ssp-to-all || continue
79 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
80 esac
81 done
82}
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 VAL
89 declare -a new
90
91 VAR=$1
92 shift
93 eval VAL=\${${VAR}}
94 for f in ${VAL}; do
95 for x in "$@"; do
96 # Note this should work with globs like -O*
97 [[ ${f} == ${x} ]] && continue 2
98 done
99 eval new\[\${\#new\[@]}]=\${f}
100 done
101 eval export ${VAR}=\${new\[*]}
102}
103
104# @FUNCTION: filter-flags
105# @USAGE: <flags>
106# @DESCRIPTION:
107# Remove particular <flags> from {C,CPP,CXX}FLAGS. Accepts shell globs.
101filter-flags() { 108filter-flags() {
102 local x f fset 109 _filter-hardened "$@"
103 declare -a new_CFLAGS new_CXXFLAGS 110 _filter-var CFLAGS "$@"
104 111 _filter-var CPPFLAGS "$@"
105 for x in "$@" ; do 112 _filter-var CXXFLAGS "$@"
106 case "${x}" in
107 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;;
108 -fstack-protector|-fstack-protector-all) fstack-flags;;
109 esac
110 done
111
112 for fset in CFLAGS CXXFLAGS; do
113 # Looping over the flags instead of using a global
114 # substitution ensures that we're working with flag atoms.
115 # Otherwise globs like -O* have the potential to wipe out the
116 # list of flags.
117 for f in ${!fset}; do
118 for x in "$@"; 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 0 113 return 0
128} 114}
129 115
116# @FUNCTION: filter-lfs-flags
117# @DESCRIPTION:
118# Remove flags that enable Large File Support.
130filter-lfs-flags() { 119filter-lfs-flags() {
120 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
131 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
132} 122}
133 123
124# @FUNCTION: append-cppflags
125# @USAGE: <flags>
126# @DESCRIPTION:
127# Add extra <flags> to the current CPPFLAGS.
128append-cppflags() {
129 [[ -z $* ]] && return 0
130 export CPPFLAGS="${CPPFLAGS} $*"
131 return 0
132}
133
134# @FUNCTION: append-lfs-flags
135# @DESCRIPTION:
136# Add flags that enable Large File Support.
134append-lfs-flags() { 137append-lfs-flags() {
138 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
135 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 139 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 140}
137 141
142# @FUNCTION: append-flags
143# @USAGE: <flags>
144# @DESCRIPTION:
145# Add extra <flags> to your current C[XX]FLAGS.
138append-flags() { 146append-flags() {
147 [[ -z $* ]] && return 0
139 export CFLAGS="${CFLAGS} $*" 148 export CFLAGS="${CFLAGS} $*"
140 export CXXFLAGS="${CXXFLAGS} $*" 149 export CXXFLAGS="${CXXFLAGS} $*"
141 [ -n "`is-flag -fno-stack-protector`" -o \
142 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
143 return 0 150 return 0
144} 151}
145 152
153# @FUNCTION: replace-flags
154# @USAGE: <old> <new>
155# @DESCRIPTION:
156# Replace the <old> flag with <new>. Accepts shell globs for <old>.
146replace-flags() { 157replace-flags() {
158 [[ $# != 2 ]] \
159 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
160 && die "replace-flags takes 2 arguments, not $#"
161
147 local f fset 162 local f fset
148 declare -a new_CFLAGS new_CXXFLAGS 163 declare -a new_CFLAGS new_CXXFLAGS
149 164
150 for fset in CFLAGS CXXFLAGS; do 165 for fset in CFLAGS CXXFLAGS; do
151 # Looping over the flags instead of using a global 166 # Looping over the flags instead of using a global
152 # substitution ensures that we're working with flag atoms. 167 # substitution ensures that we're working with flag atoms.
161 done 176 done
162 177
163 return 0 178 return 0
164} 179}
165 180
181# @FUNCTION: replace-cpu-flags
182# @USAGE: <old> <new>
183# @DESCRIPTION:
184# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
185# with flags that select the <new> cpu. Accepts shell globs for <old>.
166replace-cpu-flags() { 186replace-cpu-flags() {
167 local newcpu="$#" ; newcpu="${!newcpu}" 187 local newcpu="$#" ; newcpu="${!newcpu}"
168 while [ $# -gt 1 ] ; do 188 while [ $# -gt 1 ] ; do
169 # quote to make sure that no globbing is done (particularly on 189 # quote to make sure that no globbing is done (particularly on
170 # ${oldcpu} prior to calling replace-flags 190 # ${oldcpu}) prior to calling replace-flags
171 replace-flags "-march=${1}" "-march=${newcpu}" 191 replace-flags "-march=${1}" "-march=${newcpu}"
172 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 192 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
173 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 193 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
174 shift 194 shift
175 done 195 done
176 return 0 196 return 0
177} 197}
178 198
199_is_flagq() {
200 local x
201 for x in ${!1} ; do
202 [[ ${x} == $2 ]] && return 0
203 done
204 return 1
205}
206
207# @FUNCTION: is-flagq
208# @USAGE: <flag>
209# @DESCRIPTION:
210# Returns shell true if <flag> is in C[XX]FLAGS, else returns shell false. Accepts shell globs.
211is-flagq() {
212 [[ -n $2 ]] && die "Usage: is-flag <flag>"
213 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
214}
215
216# @FUNCTION: is-flag
217# @USAGE: <flag>
218# @DESCRIPTION:
219# Echo's "true" if flag is set in C[XX]FLAGS. Accepts shell globs.
179is-flag() { 220is-flag() {
180 local x 221 is-flagq "$@" && 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} 222}
191 223
224# @FUNCTION: is-ldflagq
225# @USAGE: <flag>
226# @DESCRIPTION:
227# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
228is-ldflagq() {
229 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
230 _is_flagq LDFLAGS $1
231}
232
233# @FUNCTION: is-ldflag
234# @USAGE: <flag>
235# @DESCRIPTION:
236# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
237is-ldflag() {
238 is-ldflagq "$@" && echo true
239}
240
241# @FUNCTION: filter-mfpmath
242# @USAGE: <math types>
243# @DESCRIPTION:
244# Remove specified math types from the fpmath flag. For example, if the user
245# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
246# -mfpmath=386.
192filter-mfpmath() { 247filter-mfpmath() {
193 local orig_mfpmath new_math prune_math 248 local orig_mfpmath new_math prune_math
194 249
195 # save the original -mfpmath flag 250 # save the original -mfpmath flag
196 orig_mfpmath="`get-flag -mfpmath`" 251 orig_mfpmath=$(get-flag -mfpmath)
197 # get the value of the current -mfpmath flag 252 # get the value of the current -mfpmath flag
198 new_math=" `get-flag mfpmath | tr , ' '` " 253 new_math=$(get-flag mfpmath)
254 new_math=" ${new_math//,/ } "
199 # figure out which math values are to be removed 255 # figure out which math values are to be removed
200 prune_math="" 256 prune_math=""
201 for prune_math in "$@" ; do 257 for prune_math in "$@" ; do
202 new_math="${new_math/ ${prune_math} / }" 258 new_math=${new_math/ ${prune_math} / }
203 done 259 done
204 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 260 new_math=$(echo ${new_math})
261 new_math=${new_math// /,}
205 262
206 if [ -z "${new_math}" ] ; then 263 if [[ -z ${new_math} ]] ; then
207 # if we're removing all user specified math values are 264 # if we're removing all user specified math values are
208 # slated for removal, then we just filter the flag 265 # slated for removal, then we just filter the flag
209 filter-flags ${orig_mfpmath} 266 filter-flags ${orig_mfpmath}
210 else 267 else
211 # if we only want to filter some of the user specified 268 # if we only want to filter some of the user specified
213 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 270 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
214 fi 271 fi
215 return 0 272 return 0
216} 273}
217 274
275# @FUNCTION: strip-flags
276# @DESCRIPTION:
277# Strip C[XX]FLAGS of everything except known good/safe flags.
218strip-flags() { 278strip-flags() {
219 local x y flag NEW_CFLAGS NEW_CXXFLAGS 279 local x y flag NEW_CFLAGS NEW_CXXFLAGS
220 280
221 setup-allowed-flags 281 setup-allowed-flags
222 282
223 local NEW_CFLAGS="" 283 local NEW_CFLAGS=""
224 local NEW_CXXFLAGS="" 284 local NEW_CXXFLAGS=""
225 285
226 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 286 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
227 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 287 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
228 use debug && einfo "Enabling the use of some unstable flags"
229 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 288 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
230 fi 289 fi
231 290
232 set -f # disable pathname expansion 291 set -f # disable pathname expansion
233 292
264 export CFLAGS="${NEW_CFLAGS}" 323 export CFLAGS="${NEW_CFLAGS}"
265 export CXXFLAGS="${NEW_CXXFLAGS}" 324 export CXXFLAGS="${NEW_CXXFLAGS}"
266 return 0 325 return 0
267} 326}
268 327
328test-flag-PROG() {
329 local comp=$1
330 local flags="$2"
331
332 [[ -z ${comp} || -z ${flags} ]] && \
333 return 1
334
335 local PROG=$(tc-get${comp})
336 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
337 > /dev/null 2>&1
338}
339
340# @FUNCTION: test-flag-CC
341# @USAGE: <flag>
342# @DESCRIPTION:
343# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
344test-flag-CC() { test-flag-PROG "CC" "$1"; }
345
346# @FUNCTION: test-flag-CXX
347# @USAGE: <flag>
348# @DESCRIPTION:
349# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
350test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
351
352test-flags-PROG() {
353 local comp=$1
354 local flags
355 local x
356
357 shift
358
359 [[ -z ${comp} ]] && return 1
360
361 x=""
362 for x in "$@" ; do
363 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
364 done
365
366 echo "${flags}"
367
368 # Just bail if we dont have any flags
369 [[ -n ${flags} ]]
370}
371
372# @FUNCTION: test-flags-CC
373# @USAGE: <flags>
374# @DESCRIPTION:
375# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
376test-flags-CC() { test-flags-PROG "CC" "$@"; }
377
378# @FUNCTION: test-flags-CXX
379# @USAGE: <flags>
380# @DESCRIPTION:
381# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
382test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
383
384# @FUNCTION: test-flags
385# @USAGE: <flags>
386# @DESCRIPTION:
387# Short-hand that should hopefully work for both C and C++ compiler, but
388# its really only present due to the append-flags() abomination.
389test-flags() { test-flags-CC "$@"; }
390
391# @FUNCTION: test_flag
392# @DESCRIPTION:
393# DEPRICIATED, use test-flags()
269test_flag() { 394test_flag() {
270 local cc=${CC:-gcc} ; cc=${cc%% *} 395 ewarn "test_flag: deprecated, please use test-flags()!" >&2
271 if ${cc} -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
272 printf "%s\n" "$*"
273 return 0
274 fi
275 return 1
276}
277 396
397 test-flags-CC "$@"
398}
399
400# @FUNCTION: test_version_info
401# @USAGE: <version>
402# @DESCRIPTION:
403# Returns shell true if the current C compiler version matches <version>, else returns shell false.
404# Accepts shell globs.
278test_version_info() { 405test_version_info() {
279 local cc=${CC:-gcc} ; cc=${cc%% *}
280 if [[ $(${cc} --version 2>&1) == *$1* ]]; then 406 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
281 return 0 407 return 0
282 else 408 else
283 return 1 409 return 1
284 fi 410 fi
285} 411}
286 412
413# @FUNCTION: strip-unsupported-flags
414# @DESCRIPTION:
415# Strip C[XX]FLAGS of any flags not supported by the active toolchain.
287strip-unsupported-flags() { 416strip-unsupported-flags() {
288 local NEW_CFLAGS NEW_CXXFLAGS 417 export CFLAGS=$(test-flags-CC ${CFLAGS})
289 418 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
290 for x in ${CFLAGS} ; do
291 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`"
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} 419}
300 420
421# @FUNCTION: get-flag
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Find and echo the value for a particular flag. Accepts shell globs.
301get-flag() { 425get-flag() {
302 local f findflag="$1" 426 local f findflag="$1"
303 427
304 # this code looks a little flaky but seems to work for 428 # this code looks a little flaky but seems to work for
305 # everything we want ... 429 # everything we want ...
313 fi 437 fi
314 done 438 done
315 return 1 439 return 1
316} 440}
317 441
442# @FUNCTION: has_hardened
443# @DESCRIPTION:
444# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
318has_hardened() { 445has_hardened() {
446 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
447
319 test_version_info Hardened && return 0 448 test_version_info Hardened && return 0
320 # the specs file wont exist unless gcc has GCC_SPECS support 449 # The specs file wont exist unless gcc has GCC_SPECS support
321 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 450 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
322 return 0
323 return 1
324} 451}
325 452
453# @FUNCTION: has_pic
454# @DESCRIPTION:
455# DEPRECATED - use gcc-specs-pie from toolchain-funcs
456# indicate whether PIC is set
326has_pic() { 457has_pic() {
327 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 458 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
328 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
329 test_version_info pie && return 0
330 return 1
331}
332 459
460 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
461 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
462 gcc-specs-pie
463}
464
465# @FUNCTION: has_pie
466# @DESCRIPTION:
467# DEPRECATED - use gcc-specs-pie from toolchain-funcs
468# indicate whether PIE is set
333has_pie() { 469has_pie() {
334 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 470 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
335 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 471
336 test_version_info pie && return 0 472 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
337 return 1 473 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
474 gcc-specs-pie
338} 475}
339 476
477# @FUNCTION: has_ssp_all
478# @DESCRIPTION:
479# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
480# indicate whether code for SSP is being generated for all functions
481has_ssp_all() {
482 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
483
484 # note; this matches only -fstack-protector-all
485 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
486 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
487 gcc-specs-ssp-all
488}
489
490# @FUNCTION: has_ssp
491# @DESCRIPTION:
492# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
493# indicate whether code for SSP is being generated
340has_ssp() { 494has_ssp() {
495 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
496
497 # note; this matches both -fstack-protector and -fstack-protector-all
341 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 498 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
342 test_version_info ssp && return 0 499 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
343 return 1 500 gcc-specs-ssp
344} 501}
345 502
503# @FUNCTION: has_m64
504# @DESCRIPTION:
505# This doesn't test if the flag is accepted, it tests if the flag actually
506# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
507# return code is 0, else the return code is 1.
346has_m64() { 508has_m64() {
347 # this doesnt test if the flag is accepted, it tests if the flag 509 # this doesnt test if the flag is accepted, it tests if the flag
348 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 510 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
349 # please dont replace this function with test_flag in some future 511 # please dont replace this function with test_flag in some future
350 # clean-up! 512 # clean-up!
513
351 local temp="$(emktemp)" 514 local temp="$(emktemp)"
352 echo "int main() { return(0); }" > ${temp}.c 515 echo "int main() { return(0); }" > "${temp}".c
516 MY_CC=$(tc-getCC)
353 ${CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 517 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
354 local ret=$? 518 local ret=$?
355 rm -f ${temp}.c 519 rm -f "${temp}".c
356 [ "$ret" != "1" ] && return 0 520 [[ ${ret} != 1 ]] && return 0
357 return 1 521 return 1
358} 522}
359 523
524# @FUNCTION: has_m32
525# @DESCRIPTION:
526# This doesn't test if the flag is accepted, it tests if the flag actually
527# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
528# code is 0, else return code is 1.
360has_m32() { 529has_m32() {
361 # this doesnt test if the flag is accepted, it tests if the flag 530 # this doesnt test if the flag is accepted, it tests if the flag
362 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 531 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
363 # please dont replace this function with test_flag in some future 532 # please dont replace this function with test_flag in some future
364 # clean-up! 533 # clean-up!
534
535 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
536
365 local temp="$(emktemp)" 537 local temp=$(emktemp)
366 echo "int main() { return(0); }" > ${temp}.c 538 echo "int main() { return(0); }" > "${temp}".c
539 MY_CC=$(tc-getCC)
367 ${CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 540 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
368 local ret=$? 541 local ret=$?
369 rm -f ${temp}.c 542 rm -f "${temp}".c
370 [ "$ret" != "1" ] && return 0 543 [[ ${ret} != 1 ]] && return 0
371 return 1 544 return 1
372} 545}
373 546
547# @FUNCTION: replace-sparc64-flags
548# @DESCRIPTION:
549# Sets mcpu to v8 and uses the original value as mtune if none specified.
374replace-sparc64-flags() { 550replace-sparc64-flags() {
375 local SPARC64_CPUS="ultrasparc v9" 551 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
376 552
377 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 553 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
378 for x in ${SPARC64_CPUS}; do 554 for x in ${SPARC64_CPUS}; do
379 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 555 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
380 done 556 done
381 else 557 else
382 for x in ${SPARC64_CPUS}; do 558 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 559 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
384 done 560 done
385 fi 561 fi
386 562
387 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 563 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
388 for x in ${SPARC64_CPUS}; do 564 for x in ${SPARC64_CPUS}; do
389 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 565 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
390 done 566 done
391 else 567 else
392 for x in ${SPARC64_CPUS}; do 568 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 569 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
394 done 570 done
395 fi 571 fi
396 572
397 export CFLAGS CXXFLAGS 573 export CFLAGS CXXFLAGS
398} 574}
399 575
576# @FUNCTION: append-ldflags
577# @USAGE: <flags>
578# @DESCRIPTION:
579# Add extra <flags> to the current LDFLAGS.
400append-ldflags() { 580append-ldflags() {
581 [[ -z $* ]] && return 0
582 local flag
583 for flag in "$@"; do
584 [[ ${flag} == -l* ]] && \
585 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
586 done
587
401 export LDFLAGS="${LDFLAGS} $*" 588 export LDFLAGS="${LDFLAGS} $*"
402 return 0 589 return 0
403} 590}
404 591
592# @FUNCTION: filter-ldflags
593# @USAGE: <flags>
594# @DESCRIPTION:
595# Remove particular <flags> from LDFLAGS. Accepts shell globs.
405filter-ldflags() { 596filter-ldflags() {
406 local x 597 _filter-var LDFLAGS "$@"
598 return 0
599}
407 600
408 # we do this fancy spacing stuff so as to not filter 601# @FUNCTION: raw-ldflags
409 # out part of a flag ... we want flag atoms ! :D 602# @USAGE: <flags>
410 LDFLAGS=" ${LDFLAGS} " 603# @DESCRIPTION:
604# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
605# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
606# to gcc where it needs the '-Wl,'.
607raw-ldflags() {
608 local x input="$@"
609 [[ -z ${input} ]] && input=${LDFLAGS}
610 set --
411 for x in "$@" ; do 611 for x in ${input} ; do
412 LDFLAGS="${LDFLAGS// ${x} / }" 612 x=${x#-Wl,}
613 set -- "$@" ${x//,/ }
413 done 614 done
414 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 615 echo "$@"
415 export LDFLAGS
416 return 0
417} 616}
418 617
419etexec-flags() { 618# @FUNCTION: bindnow-flags
420 # if you're not using a hardened compiler you wont need this 619# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
421 # PIC/no-pic kludge in the first place. 620# @DESCRIPTION:
422 has_hardened || return 0 621# DEPRECATED - Gets the flags needed for "NOW" binding
423 # this kludge breaks on amd64, and probably other -fPIC dependant 622bindnow-flags() {
424 # archs. 623 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2
425 use amd64 && return 0
426 624
427 if has_pie || has_pic; then 625 case $($(tc-getLD) -v 2>&1 </dev/null) in
428 [ -z "`is-flag -fno-pic`" ] && 626 *GNU* | *'with BFD'*) # GNU ld
429 export CFLAGS="${CFLAGS} `test_flag -fno-pic`" 627 echo "-Wl,-z,now" ;;
430 [ -z "`is-flag -nopie`" ] && 628 *Apple*) # Darwin ld
431 export CFLAGS="${CFLAGS} `test_flag -nopie`" 629 echo "-bind_at_load" ;;
432 fi 630 *)
433 return 0 631 # Some linkers just recognize -V instead of -v
632 case $($(tc-getLD) -V 2>&1 </dev/null) in
633 *Solaris*) # Solaris accept almost the same GNU options
634 echo "-Wl,-z,now" ;;
635 esac
636 ;;
637 esac
434} 638}
435 639
436fstack-flags() {
437 if has_ssp; then
438 [ -z "`is-flag -fno-stack-protector`" ] &&
439 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
440 fi
441 return 0
442}
443 640
444# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 641# Some tests for when we screw with things and want to make
445# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 642# sure we didn't break anything
446# fixes. 643#TESTS() {
644# CFLAGS="-a -b -c=1"
645# CXXFLAGS="-x -y -z=2"
646# LDFLAGS="-l -m -n=3"
447# 647#
448# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 648# die() { exit 1; }
449gcc2-flags() { 649# (is-flag 1 2 3) && die
450 CFLAGS=${CFLAGS//pentium-mmx/i586} 650# (is-ldflag 1 2 3) && die
451 CFLAGS=${CFLAGS//pentium[234]/i686} 651#
452 CFLAGS=${CFLAGS//k6-[23]/k6} 652# is-flagq -l && die
453 CFLAGS=${CFLAGS//athlon-tbird/i686} 653# is-ldflagq -a && die
454 CFLAGS=${CFLAGS//athlon-4/i686} 654# is-flagq -a || die
455 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 655# is-flagq -x || die
456 CFLAGS=${CFLAGS//athlon/i686} 656# is-ldflagq -n=* || die
457 657# is-ldflagq -n && die
458 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 658#
459 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 659# strip-unsupported-flags
460 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 660# [[ ${CFLAGS} == "-c=1" ]] || die
461 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 661# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
462 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 662#
463 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 663# echo "All tests pass"
464 CXXFLAGS=${CXXFLAGS//athlon/i686} 664#}
465 665#TESTS
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
471
472 export CFLAGS CXXFLAGS
473}

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