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1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2009 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 1.148 2010/05/08 03:47:41 dirtyepic 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 28
10IUSE="debug"
11
12# need access to emktemp()
13inherit eutils toolchain-funcs
14
15#
16#### filter-flags <flags> ####
17# Remove particular flags from C[XX]FLAGS
18# Matches only complete flags
19#
20#### append-flags <flags> ####
21# Add extra flags to your current C[XX]FLAGS
22#
23#### replace-flags <orig.flag> <new.flag> ###
24# Replace a flag by another one
25#
26#### replace-cpu-flags <old.cpus> <new.cpu> ###
27# Replace march/mcpu flags that specify <old.cpus>
28# with flags that specify <new.cpu>
29#
30#### is-flag <flag> ####
31# Returns "true" if flag is set in C[XX]FLAGS
32# Matches only complete a flag
33#
34#### strip-flags ####
35# Strip C[XX]FLAGS of everything except known
36# good options.
37#
38#### strip-unsupported-flags ####
39# Strip C[XX]FLAGS of any flags not supported by
40# installed version of gcc
41#
42#### get-flag <flag> ####
43# Find and echo the value for a particular flag
44#
45#### replace-sparc64-flags ####
46# Sets mcpu to v8 and uses the original value
47# as mtune if none specified.
48#
49#### filter-mfpmath <math types> ####
50# Remove specified math types from the fpmath specification
51# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
52# will leave the user with -mfpmath=386
53#
54#### append-ldflags ####
55# Add extra flags to your current LDFLAGS
56#
57#### filter-ldflags <flags> ####
58# Remove particular flags from LDFLAGS
59# Matches only complete flags
60#
61#### etexec-flags ####
62# hooked function for hardened gcc that appends
63# -fno-pic to {C,CXX,LD}FLAGS
64# when a package is filtering -fpic, -fPIC, -fpie, -fPIE
65#
66#### fstack-flags ####
67# hooked function for hardened gcc that appends
68# -fno-stack-protector to {C,CXX,LD}FLAGS
69# when a package is filtering -fstack-protector, -fstack-protector-all
70# notice: modern automatic specs files will also suppress -fstack-protector-all
71# when only -fno-stack-protector is given
72#
73
74# C[XX]FLAGS that we allow in strip-flags 29# {C,CXX,F,FC}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed
75setup-allowed-flags() { 31setup-allowed-flags() {
76 if [ -z "${ALLOWED_FLAGS}" ] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
77 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
78 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
79 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fno-stack-protector" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
41 fi
42 # allow a bunch of flags that negate features / control ABI
43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
51 -mieee -mieee-with-inexact -mschedule \
52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
56 -msecure-plt -m*-toc -D* -U*"
57
58 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60
61 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
62 # NOTE: currently -Os have issues with gcc3 and K6* arch's
63 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
64 return 0
65}
66
67# inverted filters for hardened compiler. This is trying to unpick
68# the hardened compiler defaults.
69_filter-hardened() {
70 local f
71 for f in "$@" ; do
82 case "${ARCH}" in 72 case "${f}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 73 # Ideally we should only concern ourselves with PIE flags,
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 74 # not -fPIC or -fpic, but too many places filter -fPIC without
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 75 # thinking about -fPIE.
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 76 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 77 gcc-specs-pie || continue
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;; 78 is-flagq -nopie || append-flags -nopie;;
89 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;; 79 -fstack-protector)
80 gcc-specs-ssp || continue
81 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
82 -fstack-protector-all)
83 gcc-specs-ssp-to-all || continue
84 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
85 -fno-strict-overflow)
86 gcc-specs-nostrict || continue
87 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
90 esac 88 esac
91 fi 89 done
92 # allow a bunch of flags that negate features / control ABI
93 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all"
94 case "${ARCH}" in
95 x86|amd64|ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow" ;;
96 esac
97 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs -msoft-float -mflat -mno-faster-structs -mfaster-structs -mlittle-endian -mbig-endian -mlive-g0 -mcmodel -mno-stack-bias -mstack-bias"
98
99 # C[XX]FLAGS that we are think is ok, but needs testing
100 # NOTE: currently -Os have issues with gcc3 and K6* arch's
101 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays"
102 return 0
103} 90}
104 91
92# Remove occurrences of strings from variable given in $1
93# Strings removed are matched as globs, so for example
94# '-O*' would remove -O1, -O2 etc.
95_filter-var() {
96 local f x VAR VAL
97 declare -a new
98
99 VAR=$1
100 shift
101 eval VAL=\${${VAR}}
102 for f in ${VAL}; do
103 for x in "$@"; do
104 # Note this should work with globs like -O*
105 [[ ${f} == ${x} ]] && continue 2
106 done
107 eval new\[\${\#new\[@]}]=\${f}
108 done
109 eval export ${VAR}=\${new\[*]}
110}
111
112# @FUNCTION: filter-flags
113# @USAGE: <flags>
114# @DESCRIPTION:
115# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
105filter-flags() { 116filter-flags() {
106 local x f fset 117 _filter-hardened "$@"
107 declare -a new_CFLAGS new_CXXFLAGS 118 _filter-var CFLAGS "$@"
108 119 _filter-var CPPFLAGS "$@"
109 for x in "$@" ; do 120 _filter-var CXXFLAGS "$@"
110 case "${x}" in 121 _filter-var FFLAGS "$@"
111 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 122 _filter-var FCFLAGS "$@"
112 -fstack-protector|-fstack-protector-all) fstack-flags;;
113 esac
114 done
115
116 for fset in CFLAGS CXXFLAGS; do
117 # Looping over the flags instead of using a global
118 # substitution ensures that we're working with flag atoms.
119 # Otherwise globs like -O* have the potential to wipe out the
120 # list of flags.
121 for f in ${!fset}; do
122 for x in "$@"; do
123 # Note this should work with globs like -O*
124 [[ ${f} == ${x} ]] && continue 2
125 done
126 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
127 done
128 eval export ${fset}=\${new_${fset}\[*]}
129 done
130
131 return 0 123 return 0
132} 124}
133 125
126# @FUNCTION: filter-lfs-flags
127# @DESCRIPTION:
128# Remove flags that enable Large File Support.
134filter-lfs-flags() { 129filter-lfs-flags() {
130 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 131 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 132}
137 133
134# @FUNCTION: append-cppflags
135# @USAGE: <flags>
136# @DESCRIPTION:
137# Add extra <flags> to the current CPPFLAGS.
138append-cppflags() {
139 [[ -z $* ]] && return 0
140 export CPPFLAGS="${CPPFLAGS} $*"
141 return 0
142}
143
144# @FUNCTION: append-cflags
145# @USAGE: <flags>
146# @DESCRIPTION:
147# Add extra <flags> to the current CFLAGS.
148append-cflags() {
149 [[ -z $* ]] && return 0
150 export CFLAGS="${CFLAGS} $*"
151 return 0
152}
153
154# @FUNCTION: append-cxxflags
155# @USAGE: <flags>
156# @DESCRIPTION:
157# Add extra <flags> to the current CXXFLAGS.
158append-cxxflags() {
159 [[ -z $* ]] && return 0
160 export CXXFLAGS="${CXXFLAGS} $*"
161 return 0
162}
163
164# @FUNCTION: append-fflags
165# @USAGE: <flags>
166# @DESCRIPTION:
167# Add extra <flags> to the current {F,FC}FLAGS.
168append-fflags() {
169 [[ -z $* ]] && return 0
170 export FFLAGS="${FFLAGS} $*"
171 export FCFLAGS="${FCFLAGS} $*"
172 return 0
173}
174
175# @FUNCTION: append-lfs-flags
176# @DESCRIPTION:
177# Add flags that enable Large File Support.
138append-lfs-flags() { 178append-lfs-flags() {
179 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 180 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140} 181}
141 182
183# @FUNCTION: append-flags
184# @USAGE: <flags>
185# @DESCRIPTION:
186# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
142append-flags() { 187append-flags() {
143 export CFLAGS="${CFLAGS} $*" 188 [[ -z $* ]] && return 0
144 export CXXFLAGS="${CXXFLAGS} $*" 189 append-cflags "$@"
145 [ -n "`is-flag -fno-stack-protector`" -o \ 190 append-cxxflags "$@"
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 191 append-fflags "$@"
147 return 0 192 return 0
148} 193}
149 194
195# @FUNCTION: replace-flags
196# @USAGE: <old> <new>
197# @DESCRIPTION:
198# Replace the <old> flag with <new>. Accepts shell globs for <old>.
150replace-flags() { 199replace-flags() {
200 [[ $# != 2 ]] \
201 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
202 && die "replace-flags takes 2 arguments, not $#"
203
151 local f fset 204 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS 205 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
153 206
154 for fset in CFLAGS CXXFLAGS; do 207 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
155 # Looping over the flags instead of using a global 208 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms. 209 # substitution ensures that we're working with flag atoms.
157 # Otherwise globs like -O* have the potential to wipe out the 210 # Otherwise globs like -O* have the potential to wipe out the
158 # list of flags. 211 # list of flags.
159 for f in ${!fset}; do 212 for f in ${!fset}; do
165 done 218 done
166 219
167 return 0 220 return 0
168} 221}
169 222
223# @FUNCTION: replace-cpu-flags
224# @USAGE: <old> <new>
225# @DESCRIPTION:
226# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
227# with flags that select the <new> cpu. Accepts shell globs for <old>.
170replace-cpu-flags() { 228replace-cpu-flags() {
171 local newcpu="$#" ; newcpu="${!newcpu}" 229 local newcpu="$#" ; newcpu="${!newcpu}"
172 while [ $# -gt 1 ] ; do 230 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on 231 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags 232 # ${oldcpu}) prior to calling replace-flags
175 replace-flags "-march=${1}" "-march=${newcpu}" 233 replace-flags "-march=${1}" "-march=${newcpu}"
176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 234 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 235 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift 236 shift
179 done 237 done
180 return 0 238 return 0
181} 239}
182 240
241_is_flagq() {
242 local x
243 for x in ${!1} ; do
244 [[ ${x} == $2 ]] && return 0
245 done
246 return 1
247}
248
249# @FUNCTION: is-flagq
250# @USAGE: <flag>
251# @DESCRIPTION:
252# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
253is-flagq() {
254 [[ -n $2 ]] && die "Usage: is-flag <flag>"
255 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
256}
257
258# @FUNCTION: is-flag
259# @USAGE: <flag>
260# @DESCRIPTION:
261# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
183is-flag() { 262is-flag() {
184 local x 263 is-flagq "$@" && 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} 264}
195 265
266# @FUNCTION: is-ldflagq
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
270is-ldflagq() {
271 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
272 _is_flagq LDFLAGS $1
273}
274
275# @FUNCTION: is-ldflag
276# @USAGE: <flag>
277# @DESCRIPTION:
278# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
279is-ldflag() {
280 is-ldflagq "$@" && echo true
281}
282
283# @FUNCTION: filter-mfpmath
284# @USAGE: <math types>
285# @DESCRIPTION:
286# Remove specified math types from the fpmath flag. For example, if the user
287# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
288# -mfpmath=386.
196filter-mfpmath() { 289filter-mfpmath() {
197 local orig_mfpmath new_math prune_math 290 local orig_mfpmath new_math prune_math
198 291
199 # save the original -mfpmath flag 292 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`" 293 orig_mfpmath=$(get-flag -mfpmath)
201 # get the value of the current -mfpmath flag 294 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` " 295 new_math=$(get-flag mfpmath)
296 new_math=" ${new_math//,/ } "
203 # figure out which math values are to be removed 297 # figure out which math values are to be removed
204 prune_math="" 298 prune_math=""
205 for prune_math in "$@" ; do 299 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }" 300 new_math=${new_math/ ${prune_math} / }
207 done 301 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 302 new_math=$(echo ${new_math})
303 new_math=${new_math// /,}
209 304
210 if [ -z "${new_math}" ] ; then 305 if [[ -z ${new_math} ]] ; then
211 # if we're removing all user specified math values are 306 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag 307 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath} 308 filter-flags ${orig_mfpmath}
214 else 309 else
215 # if we only want to filter some of the user specified 310 # if we only want to filter some of the user specified
217 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 312 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218 fi 313 fi
219 return 0 314 return 0
220} 315}
221 316
317# @FUNCTION: strip-flags
318# @DESCRIPTION:
319# Strip C[XX]FLAGS of everything except known good/safe flags.
222strip-flags() { 320strip-flags() {
223 local x y flag NEW_CFLAGS NEW_CXXFLAGS 321 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
224 322
225 setup-allowed-flags 323 setup-allowed-flags
226 324
227 local NEW_CFLAGS="" 325 local NEW_CFLAGS=""
228 local NEW_CXXFLAGS="" 326 local NEW_CXXFLAGS=""
327 local NEW_FFLAGS=""
328 local NEW_FCFLAGS=""
229 329
230 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 330 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
231 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 331 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
232 use debug && einfo "Enabling the use of some unstable flags"
233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 332 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
234 fi 333 fi
235 334
236 set -f # disable pathname expansion 335 set -f # disable pathname expansion
237 336
253 break 352 break
254 fi 353 fi
255 done 354 done
256 done 355 done
257 356
357 for x in ${FFLAGS}; do
358 for y in ${ALLOWED_FLAGS}; do
359 flag=${x%%=*}
360 if [ "${flag%%${y}}" = "" ] ; then
361 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
362 break
363 fi
364 done
365 done
366
367 for x in ${FCFLAGS}; do
368 for y in ${ALLOWED_FLAGS}; do
369 flag=${x%%=*}
370 if [ "${flag%%${y}}" = "" ] ; then
371 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
372 break
373 fi
374 done
375 done
376
258 # In case we filtered out all optimization flags fallback to -O2 377 # In case we filtered out all optimization flags fallback to -O2
259 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 378 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
260 NEW_CFLAGS="${NEW_CFLAGS} -O2" 379 NEW_CFLAGS="${NEW_CFLAGS} -O2"
261 fi 380 fi
262 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 381 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
263 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 382 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
264 fi 383 fi
384 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
385 NEW_FFLAGS="${NEW_FFLAGS} -O2"
386 fi
387 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
388 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
389 fi
265 390
266 set +f # re-enable pathname expansion 391 set +f # re-enable pathname expansion
267 392
268 export CFLAGS="${NEW_CFLAGS}" 393 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}" 394 export CXXFLAGS="${NEW_CXXFLAGS}"
395 export FFLAGS="${NEW_FFLAGS}"
396 export FCFLAGS="${NEW_FCFLAGS}"
397 return 0
398}
399
400test-flag-PROG() {
401 local comp=$1
402 local flags="$2"
403
404 [[ -z ${comp} || -z ${flags} ]] && \
270 return 0 405 return 1
271}
272 406
407 local PROG=$(tc-get${comp})
408 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
409 > /dev/null 2>&1
410}
411
412# @FUNCTION: test-flag-CC
413# @USAGE: <flag>
414# @DESCRIPTION:
415# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
416test-flag-CC() { test-flag-PROG "CC" "$1"; }
417
418# @FUNCTION: test-flag-CXX
419# @USAGE: <flag>
420# @DESCRIPTION:
421# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
422test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
423
424# @FUNCTION: test-flag-F77
425# @USAGE: <flag>
426# @DESCRIPTION:
427# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
428test-flag-F77() { test-flag-PROG "F77" "$1"; }
429
430# @FUNCTION: test-flag-FC
431# @USAGE: <flag>
432# @DESCRIPTION:
433# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
434test-flag-FC() { test-flag-PROG "FC" "$1"; }
435
436test-flags-PROG() {
437 local comp=$1
438 local flags
439 local x
440
441 shift
442
443 [[ -z ${comp} ]] && return 1
444
445 x=""
446 for x in "$@" ; do
447 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
448 done
449
450 echo "${flags}"
451
452 # Just bail if we dont have any flags
453 [[ -n ${flags} ]]
454}
455
456# @FUNCTION: test-flags-CC
457# @USAGE: <flags>
458# @DESCRIPTION:
459# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
460test-flags-CC() { test-flags-PROG "CC" "$@"; }
461
462# @FUNCTION: test-flags-CXX
463# @USAGE: <flags>
464# @DESCRIPTION:
465# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
466test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
467
468# @FUNCTION: test-flags-F77
469# @USAGE: <flags>
470# @DESCRIPTION:
471# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
472test-flags-F77() { test-flags-PROG "F77" "$@"; }
473
474# @FUNCTION: test-flags-FC
475# @USAGE: <flags>
476# @DESCRIPTION:
477# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
478test-flags-FC() { test-flags-PROG "FC" "$@"; }
479
480# @FUNCTION: test-flags
481# @USAGE: <flags>
482# @DESCRIPTION:
483# Short-hand that should hopefully work for both C and C++ compiler, but
484# its really only present due to the append-flags() abomination.
485test-flags() { test-flags-CC "$@"; }
486
487# @FUNCTION: test_flag
488# @DESCRIPTION:
489# DEPRICIATED, use test-flags()
273test_flag() { 490test_flag() {
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 491 ewarn "test_flag: deprecated, please use test-flags()!" >&2
275 printf "%s\n" "$*"
276 return 0
277 fi
278 return 1
279}
280 492
493 test-flags-CC "$@"
494}
495
496# @FUNCTION: test_version_info
497# @USAGE: <version>
498# @DESCRIPTION:
499# Returns shell true if the current C compiler version matches <version>, else returns shell false.
500# Accepts shell globs.
281test_version_info() { 501test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 502 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 503 return 0
284 else 504 else
285 return 1 505 return 1
286 fi 506 fi
287} 507}
288 508
509# @FUNCTION: strip-unsupported-flags
510# @DESCRIPTION:
511# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
289strip-unsupported-flags() { 512strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 513 export CFLAGS=$(test-flags-CC ${CFLAGS})
291 514 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
292 for x in ${CFLAGS} ; do 515 export FFLAGS=$(test-flags-F77 ${FFLAGS})
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 516 export FCFLAGS=$(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} 517}
302 518
519# @FUNCTION: get-flag
520# @USAGE: <flag>
521# @DESCRIPTION:
522# Find and echo the value for a particular flag. Accepts shell globs.
303get-flag() { 523get-flag() {
304 local f findflag="$1" 524 local f findflag="$1"
305 525
306 # this code looks a little flaky but seems to work for 526 # this code looks a little flaky but seems to work for
307 # everything we want ... 527 # everything we want ...
308 # for example, if CFLAGS="-march=i686": 528 # for example, if CFLAGS="-march=i686":
309 # `get-flag -march` == "-march=i686" 529 # `get-flag -march` == "-march=i686"
310 # `get-flag march` == "i686" 530 # `get-flag march` == "i686"
311 for f in ${CFLAGS} ${CXXFLAGS} ; do 531 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
312 if [ "${f/${findflag}}" != "${f}" ] ; then 532 if [ "${f/${findflag}}" != "${f}" ] ; then
313 printf "%s\n" "${f/-${findflag}=}" 533 printf "%s\n" "${f/-${findflag}=}"
314 return 0 534 return 0
315 fi 535 fi
316 done 536 done
317 return 1 537 return 1
318} 538}
319 539
540# @FUNCTION: has_hardened
541# @DESCRIPTION:
542# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
320has_hardened() { 543has_hardened() {
544 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
545
321 test_version_info Hardened && return 0 546 test_version_info Hardened && return 0
322 # the specs file wont exist unless gcc has GCC_SPECS support 547 # The specs file wont exist unless gcc has GCC_SPECS support
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 548 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
324 return 0
325 return 1
326} 549}
327 550
551# @FUNCTION: has_pic
552# @DESCRIPTION:
553# DEPRECATED - use gcc-specs-pie from toolchain-funcs
554# indicate whether PIC is set
328has_pic() { 555has_pic() {
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 556 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331 test_version_info pie && return 0
332 return 1
333}
334 557
558 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
559 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
560 gcc-specs-pie
561}
562
563# @FUNCTION: has_pie
564# @DESCRIPTION:
565# DEPRECATED - use gcc-specs-pie from toolchain-funcs
566# indicate whether PIE is set
335has_pie() { 567has_pie() {
336 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 568 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
337 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0 569
338 test_version_info pie && return 0 570 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
339 return 1 571 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
572 gcc-specs-pie
340} 573}
341 574
575# @FUNCTION: has_ssp_all
576# @DESCRIPTION:
577# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
578# indicate whether code for SSP is being generated for all functions
579has_ssp_all() {
580 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
581
582 # note; this matches only -fstack-protector-all
583 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
584 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
585 gcc-specs-ssp-to-all
586}
587
588# @FUNCTION: has_ssp
589# @DESCRIPTION:
590# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
591# indicate whether code for SSP is being generated
342has_ssp() { 592has_ssp() {
593 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
594
595 # note; this matches both -fstack-protector and -fstack-protector-all
343 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 596 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
344 test_version_info ssp && return 0 597 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
345 return 1 598 gcc-specs-ssp
346} 599}
347 600
601# @FUNCTION: has_m64
602# @DESCRIPTION:
603# This doesn't test if the flag is accepted, it tests if the flag actually
604# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
605# return code is 0, else the return code is 1.
348has_m64() { 606has_m64() {
349 # this doesnt test if the flag is accepted, it tests if the flag 607 # this doesnt test if the flag is accepted, it tests if the flag
350 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 608 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
351 # please dont replace this function with test_flag in some future 609 # please dont replace this function with test_flag in some future
352 # clean-up! 610 # clean-up!
611
353 local temp="$(emktemp)" 612 local temp="$(emktemp)"
354 echo "int main() { return(0); }" > ${temp}.c 613 echo "int main() { return(0); }" > "${temp}".c
355 MY_CC=$(tc-getCC) 614 MY_CC=$(tc-getCC)
356 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 615 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
357 local ret=$? 616 local ret=$?
358 rm -f ${temp}.c 617 rm -f "${temp}".c
359 [ "$ret" != "1" ] && return 0 618 [[ ${ret} != 1 ]] && return 0
360 return 1 619 return 1
361} 620}
362 621
622# @FUNCTION: has_m32
623# @DESCRIPTION:
624# This doesn't test if the flag is accepted, it tests if the flag actually
625# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
626# code is 0, else return code is 1.
363has_m32() { 627has_m32() {
364 # this doesnt test if the flag is accepted, it tests if the flag 628 # this doesnt test if the flag is accepted, it tests if the flag
365 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 629 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
366 # please dont replace this function with test_flag in some future 630 # please dont replace this function with test_flag in some future
367 # clean-up! 631 # clean-up!
632
633 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
634
368 local temp="$(emktemp)" 635 local temp=$(emktemp)
369 echo "int main() { return(0); }" > ${temp}.c 636 echo "int main() { return(0); }" > "${temp}".c
370 MY_CC=$(tc-getCC) 637 MY_CC=$(tc-getCC)
371 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 638 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
372 local ret=$? 639 local ret=$?
373 rm -f ${temp}.c 640 rm -f "${temp}".c
374 [ "$ret" != "1" ] && return 0 641 [[ ${ret} != 1 ]] && return 0
375 return 1 642 return 1
376} 643}
377 644
645# @FUNCTION: replace-sparc64-flags
646# @DESCRIPTION:
647# Sets mcpu to v8 and uses the original value as mtune if none specified.
378replace-sparc64-flags() { 648replace-sparc64-flags() {
379 local SPARC64_CPUS="ultrasparc v9" 649 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
380 650
381 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 651 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
382 for x in ${SPARC64_CPUS}; do 652 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 653 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
384 done 654 done
385 else 655 else
386 for x in ${SPARC64_CPUS}; do 656 for x in ${SPARC64_CPUS}; do
387 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 657 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
388 done 658 done
389 fi 659 fi
390 660
391 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 661 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
392 for x in ${SPARC64_CPUS}; do 662 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 663 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
394 done 664 done
395 else 665 else
396 for x in ${SPARC64_CPUS}; do 666 for x in ${SPARC64_CPUS}; do
397 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 667 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
398 done 668 done
399 fi 669 fi
400 670
401 export CFLAGS CXXFLAGS 671 export CFLAGS CXXFLAGS
402} 672}
403 673
674# @FUNCTION: append-libs
675# @USAGE: <libs>
676# @DESCRIPTION:
677# Add extra <libs> to the current LIBS.
678append-libs() {
679 [[ -z $* ]] && return 0
680 local flag
681 for flag in "$@"; do
682 [[ ${flag} == -l* ]] && flag=${flag#-l}
683 export LIBS="${LIBS} -l${flag}"
684 done
685
686 return 0
687}
688
689# @FUNCTION: append-ldflags
690# @USAGE: <flags>
691# @DESCRIPTION:
692# Add extra <flags> to the current LDFLAGS.
404append-ldflags() { 693append-ldflags() {
694 [[ -z $* ]] && return 0
695 local flag
696 for flag in "$@"; do
697 [[ ${flag} == -l* ]] && \
698 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
699 done
700
405 export LDFLAGS="${LDFLAGS} $*" 701 export LDFLAGS="${LDFLAGS} $*"
406 return 0 702 return 0
407} 703}
408 704
705# @FUNCTION: filter-ldflags
706# @USAGE: <flags>
707# @DESCRIPTION:
708# Remove particular <flags> from LDFLAGS. Accepts shell globs.
409filter-ldflags() { 709filter-ldflags() {
410 local x 710 _filter-var LDFLAGS "$@"
711 return 0
712}
411 713
412 # we do this fancy spacing stuff so as to not filter 714# @FUNCTION: raw-ldflags
413 # out part of a flag ... we want flag atoms ! :D 715# @USAGE: <flags>
414 LDFLAGS=" ${LDFLAGS} " 716# @DESCRIPTION:
717# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
718# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
719# to gcc where it needs the '-Wl,'.
720raw-ldflags() {
721 local x input="$@"
722 [[ -z ${input} ]] && input=${LDFLAGS}
723 set --
415 for x in "$@" ; do 724 for x in ${input} ; do
416 LDFLAGS="${LDFLAGS// ${x} / }" 725 x=${x#-Wl,}
726 set -- "$@" ${x//,/ }
417 done 727 done
418 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}" 728 echo "$@"
419 export LDFLAGS
420 return 0
421} 729}
422 730
423etexec-flags() { 731# @FUNCTION: no-as-needed
424 # if you're not using a hardened compiler you wont need this 732# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
425 # PIC/no-pic kludge in the first place. 733no-as-needed() {
426 has_hardened || return 0 734 case $($(tc-getLD) -v 2>&1 </dev/null) in
427 use amd64 && return 0 735 *GNU*) # GNU ld
428 use mips && return 0 736 echo "-Wl,--no-as-needed" ;;
429 737 esac
430 if has_pie || has_pic; then
431 [ -z "`is-flag -fno-pic`" ] &&
432 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
433 [ -z "`is-flag -nopie`" ] &&
434 export CFLAGS="${CFLAGS} `test_flag -nopie`"
435 fi
436 return 0
437} 738}
438 739
439fstack-flags() { 740# Some tests for when we screw with things and want to make
440 if has_ssp; then 741# sure we didn't break anything
441 [ -z "`is-flag -fno-stack-protector`" ] && 742#TESTS() {
442 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 743# CFLAGS="-a -b -c=1"
443 fi 744# CXXFLAGS="-x -y -z=2"
444 return 0 745# LDFLAGS="-l -m -n=3"
445}
446
447# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
448# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
449# fixes.
450# 746#
451# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 747# die() { exit 1; }
452gcc2-flags() { 748# (is-flag 1 2 3) && die
453 CFLAGS=${CFLAGS//pentium-mmx/i586} 749# (is-ldflag 1 2 3) && die
454 CFLAGS=${CFLAGS//pentium[234]/i686} 750#
455 CFLAGS=${CFLAGS//k6-[23]/k6} 751# is-flagq -l && die
456 CFLAGS=${CFLAGS//athlon-tbird/i686} 752# is-ldflagq -a && die
457 CFLAGS=${CFLAGS//athlon-4/i686} 753# is-flagq -a || die
458 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 754# is-flagq -x || die
459 CFLAGS=${CFLAGS//athlon/i686} 755# is-ldflagq -n=* || die
460 756# is-ldflagq -n && die
461 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586} 757#
462 CXXFLAGS=${CXXFLAGS//pentium[234]/i686} 758# strip-unsupported-flags
463 CXXFLAGS=${CXXFLAGS//k6-[23]/k6} 759# [[ ${CFLAGS} == "-c=1" ]] || die
464 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686} 760# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
465 CXXFLAGS=${CXXFLAGS//athlon-4/i686} 761#
466 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686} 762# echo "All tests pass"
467 CXXFLAGS=${CXXFLAGS//athlon/i686} 763#}
468 764#TESTS
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
474
475 export CFLAGS CXXFLAGS
476}

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