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1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2011 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.79 2004/12/25 18:45:56 chriswhite Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.159 2011/12/07 06:42:40 vapier 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="${ALLOWED_FLAGS} -fno-ident -fpermissive"
40 export ALLOWED_FLAGS="${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 -mfloat-gprs -mspe -mno-spe \
52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
54 -m32 -m64 -mx32 -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="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
62 -mno-bmi -mno-tbm"
63
64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
67 return 0
68}
69
70# inverted filters for hardened compiler. This is trying to unpick
71# the hardened compiler defaults.
72_filter-hardened() {
73 local f
74 for f in "$@" ; do
82 case "${ARCH}" in 75 case "${f}" in
83 mips) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -EL -EB -mabi" ;; 76 # Ideally we should only concern ourselves with PIE flags,
84 amd64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC -m64" ;; 77 # not -fPIC or -fpic, but too many places filter -fPIC without
85 x86) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32" ;; 78 # thinking about -fPIE.
86 alpha) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
87 ia64) ALLOWED_FLAGS="${ALLOWED_FLAGS} -fPIC" ;; 80 gcc-specs-pie || continue
88 sparc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -m32 -m64" ;; 81 is-flagq -nopie || append-flags -nopie;;
89 ppc) ALLOWED_FLAGS="${ALLOWED_FLAGS} -mabi" ;; 82 -fstack-protector)
83 gcc-specs-ssp || continue
84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
85 -fstack-protector-all)
86 gcc-specs-ssp-to-all || continue
87 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 -fno-strict-overflow)
89 gcc-specs-nostrict || continue
90 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
90 esac 91 esac
91 fi 92 done
92 # allow a bunch of flags that negate features / control ABI
93 ALLOWED_FLAGS="${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} 93}
104 94
95# Remove occurrences of strings from variable given in $1
96# Strings removed are matched as globs, so for example
97# '-O*' would remove -O1, -O2 etc.
98_filter-var() {
99 local f x VAR VAL
100 declare -a new
101
102 VAR=$1
103 shift
104 eval VAL=\${${VAR}}
105 for f in ${VAL}; do
106 for x in "$@"; do
107 # Note this should work with globs like -O*
108 [[ ${f} == ${x} ]] && continue 2
109 done
110 eval new\[\${\#new\[@]}]=\${f}
111 done
112 eval export ${VAR}=\${new\[*]}
113}
114
115# @FUNCTION: filter-flags
116# @USAGE: <flags>
117# @DESCRIPTION:
118# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
105filter-flags() { 119filter-flags() {
106 local x f fset 120 _filter-hardened "$@"
107 declare -a new_CFLAGS new_CXXFLAGS 121 _filter-var CFLAGS "$@"
108 122 _filter-var CPPFLAGS "$@"
109 for x in "$@" ; do 123 _filter-var CXXFLAGS "$@"
110 case "${x}" in 124 _filter-var FFLAGS "$@"
111 -fPIC|-fpic|-fPIE|-fpie|-pie) etexec-flags;; 125 _filter-var FCFLAGS "$@"
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 0 126 return 0
132} 127}
133 128
129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
134filter-lfs-flags() { 132filter-lfs-flags() {
133 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
134 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
135 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
136 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
137 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
135 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 138 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
136} 139}
137 140
141# @FUNCTION: append-cppflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CPPFLAGS.
145append-cppflags() {
146 [[ $# -eq 0 ]] && return 0
147 export CPPFLAGS="${CPPFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CFLAGS.
155append-cflags() {
156 [[ $# -eq 0 ]] && return 0
157 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
158 return 0
159}
160
161# @FUNCTION: append-cxxflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current CXXFLAGS.
165append-cxxflags() {
166 [[ $# -eq 0 ]] && return 0
167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
168 return 0
169}
170
171# @FUNCTION: append-fflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current {F,FC}FLAGS.
175append-fflags() {
176 [[ $# -eq 0 ]] && return 0
177 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
179 return 0
180}
181
182# @FUNCTION: append-lfs-flags
183# @DESCRIPTION:
184# Add flags that enable Large File Support.
138append-lfs-flags() { 185append-lfs-flags() {
186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # see comments in filter-lfs-flags func for meaning of these
139 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
140} 189}
141 190
191# @FUNCTION: append-flags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
142append-flags() { 195append-flags() {
143 export CFLAGS="${CFLAGS} $*" 196 [[ $# -eq 0 ]] && return 0
144 export CXXFLAGS="${CXXFLAGS} $*" 197 append-cflags "$@"
145 [ -n "`is-flag -fno-stack-protector`" -o \ 198 append-cxxflags "$@"
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 199 append-fflags "$@"
147 return 0 200 return 0
148} 201}
149 202
203# @FUNCTION: replace-flags
204# @USAGE: <old> <new>
205# @DESCRIPTION:
206# Replace the <old> flag with <new>. Accepts shell globs for <old>.
150replace-flags() { 207replace-flags() {
208 [[ $# != 2 ]] \
209 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
210 && die "replace-flags takes 2 arguments, not $#"
211
151 local f fset 212 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS 213 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
153 214
154 for fset in CFLAGS CXXFLAGS; do 215 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
155 # Looping over the flags instead of using a global 216 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms. 217 # substitution ensures that we're working with flag atoms.
157 # Otherwise globs like -O* have the potential to wipe out the 218 # Otherwise globs like -O* have the potential to wipe out the
158 # list of flags. 219 # list of flags.
159 for f in ${!fset}; do 220 for f in ${!fset}; do
165 done 226 done
166 227
167 return 0 228 return 0
168} 229}
169 230
231# @FUNCTION: replace-cpu-flags
232# @USAGE: <old> <new>
233# @DESCRIPTION:
234# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
235# with flags that select the <new> cpu. Accepts shell globs for <old>.
170replace-cpu-flags() { 236replace-cpu-flags() {
171 local newcpu="$#" ; newcpu="${!newcpu}" 237 local newcpu="$#" ; newcpu="${!newcpu}"
172 while [ $# -gt 1 ] ; do 238 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on 239 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags 240 # ${oldcpu}) prior to calling replace-flags
175 replace-flags "-march=${1}" "-march=${newcpu}" 241 replace-flags "-march=${1}" "-march=${newcpu}"
176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 242 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 243 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift 244 shift
179 done 245 done
180 return 0 246 return 0
181} 247}
182 248
249_is_flagq() {
250 local x
251 for x in ${!1} ; do
252 [[ ${x} == $2 ]] && return 0
253 done
254 return 1
255}
256
257# @FUNCTION: is-flagq
258# @USAGE: <flag>
259# @DESCRIPTION:
260# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
261is-flagq() {
262 [[ -n $2 ]] && die "Usage: is-flag <flag>"
263 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
264}
265
266# @FUNCTION: is-flag
267# @USAGE: <flag>
268# @DESCRIPTION:
269# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
183is-flag() { 270is-flag() {
184 local x 271 is-flagq "$@" && 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} 272}
195 273
274# @FUNCTION: is-ldflagq
275# @USAGE: <flag>
276# @DESCRIPTION:
277# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
278is-ldflagq() {
279 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
280 _is_flagq LDFLAGS $1
281}
282
283# @FUNCTION: is-ldflag
284# @USAGE: <flag>
285# @DESCRIPTION:
286# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
287is-ldflag() {
288 is-ldflagq "$@" && echo true
289}
290
291# @FUNCTION: filter-mfpmath
292# @USAGE: <math types>
293# @DESCRIPTION:
294# Remove specified math types from the fpmath flag. For example, if the user
295# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
296# -mfpmath=386.
196filter-mfpmath() { 297filter-mfpmath() {
197 local orig_mfpmath new_math prune_math 298 local orig_mfpmath new_math prune_math
198 299
199 # save the original -mfpmath flag 300 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`" 301 orig_mfpmath=$(get-flag -mfpmath)
201 # get the value of the current -mfpmath flag 302 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` " 303 new_math=$(get-flag mfpmath)
304 new_math=" ${new_math//,/ } "
203 # figure out which math values are to be removed 305 # figure out which math values are to be removed
204 prune_math="" 306 prune_math=""
205 for prune_math in "$@" ; do 307 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }" 308 new_math=${new_math/ ${prune_math} / }
207 done 309 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 310 new_math=$(echo ${new_math})
311 new_math=${new_math// /,}
209 312
210 if [ -z "${new_math}" ] ; then 313 if [[ -z ${new_math} ]] ; then
211 # if we're removing all user specified math values are 314 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag 315 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath} 316 filter-flags ${orig_mfpmath}
214 else 317 else
215 # if we only want to filter some of the user specified 318 # if we only want to filter some of the user specified
217 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 320 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218 fi 321 fi
219 return 0 322 return 0
220} 323}
221 324
325# @FUNCTION: strip-flags
326# @DESCRIPTION:
327# Strip C[XX]FLAGS of everything except known good/safe flags.
222strip-flags() { 328strip-flags() {
223 local x y flag NEW_CFLAGS NEW_CXXFLAGS 329 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
224 330
225 setup-allowed-flags 331 setup-allowed-flags
226 332
227 local NEW_CFLAGS="" 333 local NEW_CFLAGS=""
228 local NEW_CXXFLAGS="" 334 local NEW_CXXFLAGS=""
335 local NEW_FFLAGS=""
336 local NEW_FCFLAGS=""
229 337
230 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 338 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
231 if has ~${ARCH} ${ACCEPT_KEYWORDS} ; then 339 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
232 use debug && einfo "Enabling the use of some unstable flags"
233 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 340 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
234 fi 341 fi
235 342
236 set -f # disable pathname expansion 343 set -f # disable pathname expansion
237 344
253 break 360 break
254 fi 361 fi
255 done 362 done
256 done 363 done
257 364
365 for x in ${FFLAGS}; do
366 for y in ${ALLOWED_FLAGS}; do
367 flag=${x%%=*}
368 if [ "${flag%%${y}}" = "" ] ; then
369 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
370 break
371 fi
372 done
373 done
374
375 for x in ${FCFLAGS}; do
376 for y in ${ALLOWED_FLAGS}; do
377 flag=${x%%=*}
378 if [ "${flag%%${y}}" = "" ] ; then
379 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
380 break
381 fi
382 done
383 done
384
258 # In case we filtered out all optimization flags fallback to -O2 385 # In case we filtered out all optimization flags fallback to -O2
259 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 386 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
260 NEW_CFLAGS="${NEW_CFLAGS} -O2" 387 NEW_CFLAGS="${NEW_CFLAGS} -O2"
261 fi 388 fi
262 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 389 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
263 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 390 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
264 fi 391 fi
392 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
393 NEW_FFLAGS="${NEW_FFLAGS} -O2"
394 fi
395 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
396 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
397 fi
265 398
266 set +f # re-enable pathname expansion 399 set +f # re-enable pathname expansion
267 400
268 export CFLAGS="${NEW_CFLAGS}" 401 export CFLAGS="${NEW_CFLAGS}"
269 export CXXFLAGS="${NEW_CXXFLAGS}" 402 export CXXFLAGS="${NEW_CXXFLAGS}"
270 return 0 403 export FFLAGS="${NEW_FFLAGS}"
271} 404 export FCFLAGS="${NEW_FCFLAGS}"
272
273test_flag() {
274 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then
275 printf "%s\n" "$*"
276 return 0 405 return 0
277 fi
278 return 1
279} 406}
280 407
408test-flag-PROG() {
409 local comp=$1
410 local flags="$2"
411
412 [[ -z ${comp} || -z ${flags} ]] && return 1
413
414 # use -c so we can test the assembler as well
415 local PROG=$(tc-get${comp})
416 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
417 > /dev/null 2>&1
418}
419
420# @FUNCTION: test-flag-CC
421# @USAGE: <flag>
422# @DESCRIPTION:
423# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
424test-flag-CC() { test-flag-PROG "CC" "$1"; }
425
426# @FUNCTION: test-flag-CXX
427# @USAGE: <flag>
428# @DESCRIPTION:
429# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
430test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
431
432# @FUNCTION: test-flag-F77
433# @USAGE: <flag>
434# @DESCRIPTION:
435# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
436test-flag-F77() { test-flag-PROG "F77" "$1"; }
437
438# @FUNCTION: test-flag-FC
439# @USAGE: <flag>
440# @DESCRIPTION:
441# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
442test-flag-FC() { test-flag-PROG "FC" "$1"; }
443
444test-flags-PROG() {
445 local comp=$1
446 local flags
447 local x
448
449 shift
450
451 [[ -z ${comp} ]] && return 1
452
453 for x in "$@" ; do
454 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
455 done
456
457 echo "${flags}"
458
459 # Just bail if we dont have any flags
460 [[ -n ${flags} ]]
461}
462
463# @FUNCTION: test-flags-CC
464# @USAGE: <flags>
465# @DESCRIPTION:
466# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
467test-flags-CC() { test-flags-PROG "CC" "$@"; }
468
469# @FUNCTION: test-flags-CXX
470# @USAGE: <flags>
471# @DESCRIPTION:
472# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
473test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
474
475# @FUNCTION: test-flags-F77
476# @USAGE: <flags>
477# @DESCRIPTION:
478# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
479test-flags-F77() { test-flags-PROG "F77" "$@"; }
480
481# @FUNCTION: test-flags-FC
482# @USAGE: <flags>
483# @DESCRIPTION:
484# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
485test-flags-FC() { test-flags-PROG "FC" "$@"; }
486
487# @FUNCTION: test-flags
488# @USAGE: <flags>
489# @DESCRIPTION:
490# Short-hand that should hopefully work for both C and C++ compiler, but
491# its really only present due to the append-flags() abomination.
492test-flags() { test-flags-CC "$@"; }
493
494# @FUNCTION: test_version_info
495# @USAGE: <version>
496# @DESCRIPTION:
497# Returns shell true if the current C compiler version matches <version>, else returns shell false.
498# Accepts shell globs.
281test_version_info() { 499test_version_info() {
282 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 500 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
283 return 0 501 return 0
284 else 502 else
285 return 1 503 return 1
286 fi 504 fi
287} 505}
288 506
507# @FUNCTION: strip-unsupported-flags
508# @DESCRIPTION:
509# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
289strip-unsupported-flags() { 510strip-unsupported-flags() {
290 local NEW_CFLAGS NEW_CXXFLAGS 511 export CFLAGS=$(test-flags-CC ${CFLAGS})
291 512 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
292 for x in ${CFLAGS} ; do 513 export FFLAGS=$(test-flags-F77 ${FFLAGS})
293 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 514 export FCFLAGS=$(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} 515}
302 516
517# @FUNCTION: get-flag
518# @USAGE: <flag>
519# @DESCRIPTION:
520# Find and echo the value for a particular flag. Accepts shell globs.
303get-flag() { 521get-flag() {
304 local f findflag="$1" 522 local f findflag="$1"
305 523
306 # this code looks a little flaky but seems to work for 524 # this code looks a little flaky but seems to work for
307 # everything we want ... 525 # everything we want ...
308 # for example, if CFLAGS="-march=i686": 526 # for example, if CFLAGS="-march=i686":
309 # `get-flag -march` == "-march=i686" 527 # `get-flag -march` == "-march=i686"
310 # `get-flag march` == "i686" 528 # `get-flag march` == "i686"
311 for f in ${CFLAGS} ${CXXFLAGS} ; do 529 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
312 if [ "${f/${findflag}}" != "${f}" ] ; then 530 if [ "${f/${findflag}}" != "${f}" ] ; then
313 printf "%s\n" "${f/-${findflag}=}" 531 printf "%s\n" "${f/-${findflag}=}"
314 return 0 532 return 0
315 fi 533 fi
316 done 534 done
317 return 1 535 return 1
318} 536}
319 537
320has_hardened() { 538# DEAD FUNCS. Remove by Dec 2011.
321 test_version_info Hardened && return 0 539test_flag() { die "$0: deprecated, please use test-flags()!" ; }
322 # the specs file wont exist unless gcc has GCC_SPECS support 540has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
323 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 541has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
324 return 0 542has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
325 return 1 543has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
326} 544has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
327 545
328has_pic() { 546# @FUNCTION: has_m64
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 547# @DESCRIPTION:
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0 548# This doesn't test if the flag is accepted, it tests if the flag actually
331 test_version_info pie && return 0 549# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
332 return 1 550# return code is 0, else the return code is 1.
333}
334
335has_pie() {
336 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
337 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
338 test_version_info pie && return 0
339 return 1
340}
341
342has_ssp() {
343 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
344 test_version_info ssp && return 0
345 return 1
346}
347
348has_m64() { 551has_m64() {
349 # this doesnt test if the flag is accepted, it tests if the flag 552 # this doesnt test if the flag is accepted, it tests if the flag
350 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 553 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
351 # please dont replace this function with test_flag in some future 554 # please dont replace this function with test_flag in some future
352 # clean-up! 555 # clean-up!
556
353 local temp="$(emktemp)" 557 local temp="$(emktemp)"
354 echo "int main() { return(0); }" > ${temp}.c 558 echo "int main() { return(0); }" > "${temp}".c
355 MY_CC=$(tc-getCC) 559 MY_CC=$(tc-getCC)
356 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 560 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
357 local ret=$? 561 local ret=$?
358 rm -f ${temp}.c 562 rm -f "${temp}".c
359 [ "$ret" != "1" ] && return 0 563 [[ ${ret} != 1 ]] && return 0
360 return 1 564 return 1
361} 565}
362 566
567# @FUNCTION: has_m32
568# @DESCRIPTION:
569# This doesn't test if the flag is accepted, it tests if the flag actually
570# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
571# code is 0, else return code is 1.
363has_m32() { 572has_m32() {
364 # this doesnt test if the flag is accepted, it tests if the flag 573 # this doesnt test if the flag is accepted, it tests if the flag
365 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 574 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
366 # please dont replace this function with test_flag in some future 575 # please dont replace this function with test_flag in some future
367 # clean-up! 576 # clean-up!
577
578 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
579
368 local temp="$(emktemp)" 580 local temp=$(emktemp)
369 echo "int main() { return(0); }" > ${temp}.c 581 echo "int main() { return(0); }" > "${temp}".c
370 MY_CC=$(tc-getCC) 582 MY_CC=$(tc-getCC)
371 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 583 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
372 local ret=$? 584 local ret=$?
373 rm -f ${temp}.c 585 rm -f "${temp}".c
374 [ "$ret" != "1" ] && return 0 586 [[ ${ret} != 1 ]] && return 0
375 return 1 587 return 1
376} 588}
377 589
590# @FUNCTION: replace-sparc64-flags
591# @DESCRIPTION:
592# Sets mcpu to v8 and uses the original value as mtune if none specified.
378replace-sparc64-flags() { 593replace-sparc64-flags() {
379 local SPARC64_CPUS="ultrasparc v9" 594 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
380 595
381 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 596 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
382 for x in ${SPARC64_CPUS}; do 597 for x in ${SPARC64_CPUS}; do
383 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 598 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
384 done 599 done
385 else 600 else
386 for x in ${SPARC64_CPUS}; do 601 for x in ${SPARC64_CPUS}; do
387 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 602 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
388 done 603 done
389 fi 604 fi
390 605
391 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 606 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
392 for x in ${SPARC64_CPUS}; do 607 for x in ${SPARC64_CPUS}; do
393 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 608 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
394 done 609 done
395 else 610 else
396 for x in ${SPARC64_CPUS}; do 611 for x in ${SPARC64_CPUS}; do
397 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 612 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
398 done 613 done
399 fi 614 fi
400 615
401 export CFLAGS CXXFLAGS 616 export CFLAGS CXXFLAGS
402} 617}
403 618
619# @FUNCTION: append-libs
620# @USAGE: <libs>
621# @DESCRIPTION:
622# Add extra <libs> to the current LIBS.
623append-libs() {
624 [[ $# -eq 0 ]] && return 0
625 local flag
626 for flag in "$@"; do
627 [[ ${flag} == -l* ]] && flag=${flag#-l}
628 export LIBS="${LIBS} -l${flag}"
629 done
630
631 return 0
632}
633
634# @FUNCTION: append-ldflags
635# @USAGE: <flags>
636# @DESCRIPTION:
637# Add extra <flags> to the current LDFLAGS.
404append-ldflags() { 638append-ldflags() {
639 [[ $# -eq 0 ]] && return 0
640 local flag
641 for flag in "$@"; do
642 [[ ${flag} == -l* ]] && \
643 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
644 done
645
405 export LDFLAGS="${LDFLAGS} $*" 646 export LDFLAGS="${LDFLAGS} $*"
406 return 0 647 return 0
407} 648}
408 649
650# @FUNCTION: filter-ldflags
651# @USAGE: <flags>
652# @DESCRIPTION:
653# Remove particular <flags> from LDFLAGS. Accepts shell globs.
409filter-ldflags() { 654filter-ldflags() {
410 local x 655 _filter-var LDFLAGS "$@"
411
412 # we do this fancy spacing stuff so as to not filter
413 # out part of a flag ... we want flag atoms ! :D
414 LDFLAGS=" ${LDFLAGS} "
415 for x in "$@" ; do
416 LDFLAGS="${LDFLAGS// ${x} / }"
417 done
418 LDFLAGS="${LDFLAGS:1:${#LDFLAGS}-2}"
419 export LDFLAGS
420 return 0 656 return 0
421} 657}
422 658
423etexec-flags() { 659# @FUNCTION: raw-ldflags
424 # if you're not using a hardened compiler you wont need this 660# @USAGE: [flags]
425 # PIC/no-pic kludge in the first place. 661# @DESCRIPTION:
426 has_hardened || return 0 662# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
427 use amd64 && return 0 663# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
428 use mips && return 0 664# to gcc where it needs the '-Wl,'.
429
430 if has_pie || has_pic; then
431 [ -z "`is-flag -fno-pic`" ] &&
432 export CFLAGS="${CFLAGS} `test_flag -fno-pic`"
433 [ -z "`is-flag -nopie`" ] &&
434 export CFLAGS="${CFLAGS} `test_flag -nopie`"
435 fi
436 return 0
437}
438
439fstack-flags() {
440 if has_ssp; then
441 [ -z "`is-flag -fno-stack-protector`" ] &&
442 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
443 fi
444 return 0
445}
446
447# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
448# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
449# fixes.
450# 665#
451# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 666# If no flags are specified, then default to ${LDFLAGS}.
452gcc2-flags() { 667raw-ldflags() {
453 CFLAGS=${CFLAGS//pentium-mmx/i586} 668 local x input="$@"
454 CFLAGS=${CFLAGS//pentium[234]/i686} 669 [[ -z ${input} ]] && input=${LDFLAGS}
455 CFLAGS=${CFLAGS//k6-[23]/k6} 670 set --
456 CFLAGS=${CFLAGS//athlon-tbird/i686} 671 for x in ${input} ; do
457 CFLAGS=${CFLAGS//athlon-4/i686} 672 x=${x#-Wl,}
458 CFLAGS=${CFLAGS//athlon-[xm]p/i686} 673 set -- "$@" ${x//,/ }
459 CFLAGS=${CFLAGS//athlon/i686} 674 done
460 675 echo "$@"
461 CXXFLAGS=${CXXFLAGS//pentium-mmx/i586}
462 CXXFLAGS=${CXXFLAGS//pentium[234]/i686}
463 CXXFLAGS=${CXXFLAGS//k6-[23]/k6}
464 CXXFLAGS=${CXXFLAGS//athlon-tbird/i686}
465 CXXFLAGS=${CXXFLAGS//athlon-4/i686}
466 CXXFLAGS=${CXXFLAGS//athlon-[xm]p/i686}
467 CXXFLAGS=${CXXFLAGS//athlon/i686}
468
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} 676}
677
678# @FUNCTION: no-as-needed
679# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
680no-as-needed() {
681 case $($(tc-getLD) -v 2>&1 </dev/null) in
682 *GNU*) # GNU ld
683 echo "-Wl,--no-as-needed" ;;
684 esac
685}
686
687# Some tests for when we screw with things and want to make
688# sure we didn't break anything
689#TESTS() {
690# CFLAGS="-a -b -c=1"
691# CXXFLAGS="-x -y -z=2"
692# LDFLAGS="-l -m -n=3"
693#
694# die() { exit 1; }
695# (is-flag 1 2 3) && die
696# (is-ldflag 1 2 3) && die
697#
698# is-flagq -l && die
699# is-ldflagq -a && die
700# is-flagq -a || die
701# is-flagq -x || die
702# is-ldflagq -n=* || die
703# is-ldflagq -n && die
704#
705# strip-unsupported-flags
706# [[ ${CFLAGS} == "-c=1" ]] || die
707# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
708#
709# echo "All tests pass"
710#}
711#TESTS

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