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1# Copyright 1999-2005 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 1.104 2006/01/14 10:52:12 kevquinn Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.152 2011/07/12 04:08:52 vapier Exp $
4 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.
5 12
6# need access to emktemp()
7inherit eutils toolchain-funcs multilib 13inherit eutils toolchain-funcs multilib
8 14
9#
10#### filter-flags <flags> ####
11# Remove particular flags from C[XX]FLAGS
12# Matches only complete flags
13#
14#### append-flags <flags> ####
15# Add extra flags to your current C[XX]FLAGS
16#
17#### replace-flags <orig.flag> <new.flag> ###
18# Replace a flag by another one
19#
20#### replace-cpu-flags <old.cpus> <new.cpu> ###
21# Replace march/mcpu flags that specify <old.cpus>
22# with flags that specify <new.cpu>
23#
24#### is-flag <flag> ####
25# Returns "true" if flag is set in C[XX]FLAGS
26# Matches only complete a flag
27#
28#### strip-flags ####
29# Strip C[XX]FLAGS of everything except known
30# good options.
31#
32#### strip-unsupported-flags ####
33# Strip C[XX]FLAGS of any flags not supported by
34# installed version of gcc
35#
36#### get-flag <flag> ####
37# Find and echo the value for a particular flag
38#
39#### replace-sparc64-flags ####
40# Sets mcpu to v8 and uses the original value
41# as mtune if none specified.
42#
43#### filter-mfpmath <math types> ####
44# Remove specified math types from the fpmath specification
45# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
46# will leave the user with -mfpmath=386
47#
48#### append-ldflags ####
49# Add extra flags to your current LDFLAGS
50#
51#### filter-ldflags <flags> ####
52# Remove particular flags from LDFLAGS
53# Matches only complete flags
54#
55#### fstack-flags ####
56# hooked function for hardened gcc that appends
57# -fno-stack-protector to {C,CXX,LD}FLAGS
58# when a package is filtering -fstack-protector, -fstack-protector-all
59# notice: modern automatic specs files will also suppress -fstack-protector-all
60# when only -fno-stack-protector is given
61#
62#### bindnow-flags ####
63# Returns the flags to enable "now" binding in the current selected linker.
64#
65################ DEPRECATED functions ################ 15################ DEPRECATED functions ################
66# The following are still present to avoid breaking existing 16# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please 17# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you 18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler. 19# need to know which hardened techs are active in the compiler.
70# See bug #100974 20# See bug #100974
71# 21#
72#### has_hardened #### 22# has_hardened
73# Returns true if the compiler has 'Hardened' in its version string, 23# has_pie
74# (note; switched-spec vanilla compilers satisfy this condition) or 24# has_pic
75# the specs file name contains 'hardened'.
76#
77#### has_pie ####
78# Returns true if the compiler by default or with current CFLAGS
79# builds position-independent code.
80#
81#### has_pic ####
82# Returns true if the compiler by default or with current CFLAGS
83# builds position-independent code.
84#
85#### has_ssp_all #### 25# has_ssp_all
86# Returns true if the compiler by default or with current CFLAGS 26# has_ssp
87# generates stack smash protections for all functions
88#
89#### has_ssp ####
90# Returns true if the compiler by default or with current CFLAGS
91# generates stack smash protections for most vulnerable functions
92#
93 27
28
94# 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
95setup-allowed-flags() { 31setup-allowed-flags() {
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-strict-overflow"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${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="${ALLOWED_FLAGS} -W* -w"
103 fi 41 fi
104 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow -fno-omit-frame-pointer"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 51 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
56 -msecure-plt -m*-toc -D* -U*"
115 57
58 # 4.5
59 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
60 # 4.6
61 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mno-fsgsbase -mno-rdrnd -mno-f16c \
62 -mno-bmi -mno-tbm"
63
116 # C[XX]FLAGS that we are think is ok, but needs testing 64 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 65 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 66 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 67 return 0
120} 68}
121 69
70# inverted filters for hardened compiler. This is trying to unpick
71# the hardened compiler defaults.
72_filter-hardened() {
73 local f
74 for f in "$@" ; do
75 case "${f}" in
76 # Ideally we should only concern ourselves with PIE flags,
77 # not -fPIC or -fpic, but too many places filter -fPIC without
78 # thinking about -fPIE.
79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
80 gcc-specs-pie || continue
81 is-flagq -nopie || append-flags -nopie;;
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);;
91 esac
92 done
93}
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.
122filter-flags() { 119filter-flags() {
123 local x f fset 120 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 121 _filter-var CFLAGS "$@"
125 122 _filter-var CPPFLAGS "$@"
126 for x in "$@" ; do 123 _filter-var CXXFLAGS "$@"
127 case "${x}" in 124 _filter-var FFLAGS "$@"
128 -fPIC|-fpic|-fPIE|-fpie|-pie) 125 _filter-var FCFLAGS "$@"
129 append-flags `test_flag -fno-pie`;;
130 -fstack-protector|-fstack-protector-all)
131 fstack-flags;;
132 esac
133 done
134
135 for fset in CFLAGS CXXFLAGS; do
136 # Looping over the flags instead of using a global
137 # substitution ensures that we're working with flag atoms.
138 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags.
140 for f in ${!fset}; do
141 for x in "$@"; do
142 # Note this should work with globs like -O*
143 [[ ${f} == ${x} ]] && continue 2
144 done
145 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
146 done
147 eval export ${fset}=\${new_${fset}\[*]}
148 done
149
150 return 0 126 return 0
151} 127}
152 128
129# @FUNCTION: filter-lfs-flags
130# @DESCRIPTION:
131# Remove flags that enable Large File Support.
153filter-lfs-flags() { 132filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 133 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
155 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
156} 135}
157 136
137# @FUNCTION: append-cppflags
138# @USAGE: <flags>
139# @DESCRIPTION:
140# Add extra <flags> to the current CPPFLAGS.
141append-cppflags() {
142 [[ -z $* ]] && return 0
143 export CPPFLAGS="${CPPFLAGS} $*"
144 return 0
145}
146
147# @FUNCTION: append-cflags
148# @USAGE: <flags>
149# @DESCRIPTION:
150# Add extra <flags> to the current CFLAGS.
151append-cflags() {
152 [[ -z $* ]] && return 0
153 export CFLAGS="${CFLAGS} $*"
154 return 0
155}
156
157# @FUNCTION: append-cxxflags
158# @USAGE: <flags>
159# @DESCRIPTION:
160# Add extra <flags> to the current CXXFLAGS.
161append-cxxflags() {
162 [[ -z $* ]] && return 0
163 export CXXFLAGS="${CXXFLAGS} $*"
164 return 0
165}
166
167# @FUNCTION: append-fflags
168# @USAGE: <flags>
169# @DESCRIPTION:
170# Add extra <flags> to the current {F,FC}FLAGS.
171append-fflags() {
172 [[ -z $* ]] && return 0
173 export FFLAGS="${FFLAGS} $*"
174 export FCFLAGS="${FCFLAGS} $*"
175 return 0
176}
177
178# @FUNCTION: append-lfs-flags
179# @DESCRIPTION:
180# Add flags that enable Large File Support.
158append-lfs-flags() { 181append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 182 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
160 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 183 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
161} 184}
162 185
186# @FUNCTION: append-flags
187# @USAGE: <flags>
188# @DESCRIPTION:
189# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
163append-flags() { 190append-flags() {
164 [[ -z $* ]] && return 0 191 [[ -z $* ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 192 append-cflags "$@"
166 export CXXFLAGS="${CXXFLAGS} $*" 193 append-cxxflags "$@"
167 [ -n "`is-flag -fno-stack-protector`" -o \ 194 append-fflags "$@"
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
169 return 0 195 return 0
170} 196}
171 197
198# @FUNCTION: replace-flags
199# @USAGE: <old> <new>
200# @DESCRIPTION:
201# Replace the <old> flag with <new>. Accepts shell globs for <old>.
172replace-flags() { 202replace-flags() {
173 [[ $# != 2 ]] \ 203 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 204 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#" 205 && die "replace-flags takes 2 arguments, not $#"
176 206
177 local f fset 207 local f fset
178 declare -a new_CFLAGS new_CXXFLAGS 208 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
179 209
180 for fset in CFLAGS CXXFLAGS; do 210 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
181 # Looping over the flags instead of using a global 211 # Looping over the flags instead of using a global
182 # substitution ensures that we're working with flag atoms. 212 # substitution ensures that we're working with flag atoms.
183 # Otherwise globs like -O* have the potential to wipe out the 213 # Otherwise globs like -O* have the potential to wipe out the
184 # list of flags. 214 # list of flags.
185 for f in ${!fset}; do 215 for f in ${!fset}; do
191 done 221 done
192 222
193 return 0 223 return 0
194} 224}
195 225
226# @FUNCTION: replace-cpu-flags
227# @USAGE: <old> <new>
228# @DESCRIPTION:
229# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
230# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 231replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 232 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 233 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 234 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 235 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 236 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 237 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 238 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 239 shift
205 done 240 done
206 return 0 241 return 0
207} 242}
208 243
244_is_flagq() {
245 local x
246 for x in ${!1} ; do
247 [[ ${x} == $2 ]] && return 0
248 done
249 return 1
250}
251
252# @FUNCTION: is-flagq
253# @USAGE: <flag>
254# @DESCRIPTION:
255# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
256is-flagq() {
257 [[ -n $2 ]] && die "Usage: is-flag <flag>"
258 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
259}
260
261# @FUNCTION: is-flag
262# @USAGE: <flag>
263# @DESCRIPTION:
264# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 265is-flag() {
210 local x 266 is-flagq "$@" && echo true
211
212 for x in ${CFLAGS} ${CXXFLAGS} ; do
213 # Note this should work with globs like -mcpu=ultrasparc*
214 if [[ ${x} == ${1} ]]; then
215 echo true
216 return 0
217 fi
218 done
219 return 1
220} 267}
221 268
269# @FUNCTION: is-ldflagq
270# @USAGE: <flag>
271# @DESCRIPTION:
272# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
273is-ldflagq() {
274 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
275 _is_flagq LDFLAGS $1
276}
277
278# @FUNCTION: is-ldflag
279# @USAGE: <flag>
280# @DESCRIPTION:
281# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
282is-ldflag() {
283 is-ldflagq "$@" && echo true
284}
285
286# @FUNCTION: filter-mfpmath
287# @USAGE: <math types>
288# @DESCRIPTION:
289# Remove specified math types from the fpmath flag. For example, if the user
290# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
291# -mfpmath=386.
222filter-mfpmath() { 292filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 293 local orig_mfpmath new_math prune_math
224 294
225 # save the original -mfpmath flag 295 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 296 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 297 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 298 new_math=$(get-flag mfpmath)
299 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 300 # figure out which math values are to be removed
230 prune_math="" 301 prune_math=""
231 for prune_math in "$@" ; do 302 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 303 new_math=${new_math/ ${prune_math} / }
233 done 304 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 305 new_math=$(echo ${new_math})
306 new_math=${new_math// /,}
235 307
236 if [ -z "${new_math}" ] ; then 308 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 309 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 310 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 311 filter-flags ${orig_mfpmath}
240 else 312 else
241 # if we only want to filter some of the user specified 313 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 315 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 316 fi
245 return 0 317 return 0
246} 318}
247 319
320# @FUNCTION: strip-flags
321# @DESCRIPTION:
322# Strip C[XX]FLAGS of everything except known good/safe flags.
248strip-flags() { 323strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 324 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
250 325
251 setup-allowed-flags 326 setup-allowed-flags
252 327
253 local NEW_CFLAGS="" 328 local NEW_CFLAGS=""
254 local NEW_CXXFLAGS="" 329 local NEW_CXXFLAGS=""
330 local NEW_FFLAGS=""
331 local NEW_FCFLAGS=""
255 332
256 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 333 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 334 if has "~$(tc-arch)" ${ACCEPT_KEYWORDS} ; then
258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 335 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
259 fi 336 fi
260 337
261 set -f # disable pathname expansion 338 set -f # disable pathname expansion
262 339
278 break 355 break
279 fi 356 fi
280 done 357 done
281 done 358 done
282 359
360 for x in ${FFLAGS}; do
361 for y in ${ALLOWED_FLAGS}; do
362 flag=${x%%=*}
363 if [ "${flag%%${y}}" = "" ] ; then
364 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
365 break
366 fi
367 done
368 done
369
370 for x in ${FCFLAGS}; do
371 for y in ${ALLOWED_FLAGS}; do
372 flag=${x%%=*}
373 if [ "${flag%%${y}}" = "" ] ; then
374 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
375 break
376 fi
377 done
378 done
379
283 # In case we filtered out all optimization flags fallback to -O2 380 # In case we filtered out all optimization flags fallback to -O2
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 381 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
285 NEW_CFLAGS="${NEW_CFLAGS} -O2" 382 NEW_CFLAGS="${NEW_CFLAGS} -O2"
286 fi 383 fi
287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 384 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 385 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
289 fi 386 fi
387 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
388 NEW_FFLAGS="${NEW_FFLAGS} -O2"
389 fi
390 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
391 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
392 fi
290 393
291 set +f # re-enable pathname expansion 394 set +f # re-enable pathname expansion
292 395
293 export CFLAGS="${NEW_CFLAGS}" 396 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}" 397 export CXXFLAGS="${NEW_CXXFLAGS}"
398 export FFLAGS="${NEW_FFLAGS}"
399 export FCFLAGS="${NEW_FCFLAGS}"
295 return 0 400 return 0
296} 401}
297 402
298test-flag-PROG() { 403test-flag-PROG() {
299 local comp=$1 404 local comp=$1
300 local flags="$2" 405 local flags="$2"
301 406
302 [[ -z ${comp} || -z ${flags} ]] && \ 407 [[ -z ${comp} || -z ${flags} ]] && return 1
303 return 1
304 408
409 # use -c so we can test the assembler as well
305 local PROG=$(tc-get${comp}) 410 local PROG=$(tc-get${comp})
306 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 411 ${PROG} ${flags} -c -o /dev/null -xc /dev/null \
307 > /dev/null 2>&1 412 > /dev/null 2>&1
308} 413}
309 414
310# Returns true if C compiler support given flag 415# @FUNCTION: test-flag-CC
416# @USAGE: <flag>
417# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
311test-flag-CC() { test-flag-PROG "CC" "$1"; } 419test-flag-CC() { test-flag-PROG "CC" "$1"; }
312 420
313# Returns true if C++ compiler support given flag 421# @FUNCTION: test-flag-CXX
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 425test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
426
427# @FUNCTION: test-flag-F77
428# @USAGE: <flag>
429# @DESCRIPTION:
430# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
431test-flag-F77() { test-flag-PROG "F77" "$1"; }
432
433# @FUNCTION: test-flag-FC
434# @USAGE: <flag>
435# @DESCRIPTION:
436# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
437test-flag-FC() { test-flag-PROG "FC" "$1"; }
315 438
316test-flags-PROG() { 439test-flags-PROG() {
317 local comp=$1 440 local comp=$1
318 local flags 441 local flags
319 local x 442 local x
320 443
321 shift 444 shift
322 445
323 [[ -z ${comp} ]] && \ 446 [[ -z ${comp} ]] && return 1
324 return 1
325 447
448 x=""
326 for x in "$@" ; do 449 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}" 450 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
328 done 451 done
329 452
330 echo "${flags}" 453 echo "${flags}"
331 454
332 # Just bail if we dont have any flags 455 # Just bail if we dont have any flags
333 [[ -n ${flags} ]] 456 [[ -n ${flags} ]]
334} 457}
335 458
336# Returns (echo's) the given flags supported by the C compiler 459# @FUNCTION: test-flags-CC
460# @USAGE: <flags>
461# @DESCRIPTION:
462# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
337test-flags-CC() { test-flags-PROG "CC" "$@"; } 463test-flags-CC() { test-flags-PROG "CC" "$@"; }
338 464
339# Returns (echo's) the given flags supported by the C++ compiler 465# @FUNCTION: test-flags-CXX
466# @USAGE: <flags>
467# @DESCRIPTION:
468# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
340test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 469test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
341 470
471# @FUNCTION: test-flags-F77
472# @USAGE: <flags>
473# @DESCRIPTION:
474# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
475test-flags-F77() { test-flags-PROG "F77" "$@"; }
476
477# @FUNCTION: test-flags-FC
478# @USAGE: <flags>
479# @DESCRIPTION:
480# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
481test-flags-FC() { test-flags-PROG "FC" "$@"; }
482
483# @FUNCTION: test-flags
484# @USAGE: <flags>
485# @DESCRIPTION:
342# Short-hand that should hopefully work for both C and C++ compiler, but 486# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination. 487# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; } 488test-flags() { test-flags-CC "$@"; }
345 489
346# Deprecated, use test-flags() 490# @FUNCTION: test_version_info
347test_flag() { 491# @USAGE: <version>
348 ewarn "test_flag: deprecated, please use test-flags()!" >&2 492# @DESCRIPTION:
349 493# Returns shell true if the current C compiler version matches <version>, else returns shell false.
350 test-flags-CC "$@" 494# Accepts shell globs.
351}
352
353test_version_info() { 495test_version_info() {
354 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 496 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
355 return 0 497 return 0
356 else 498 else
357 return 1 499 return 1
358 fi 500 fi
359} 501}
360 502
503# @FUNCTION: strip-unsupported-flags
504# @DESCRIPTION:
505# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
361strip-unsupported-flags() { 506strip-unsupported-flags() {
362 local x NEW_CFLAGS NEW_CXXFLAGS 507 export CFLAGS=$(test-flags-CC ${CFLAGS})
363 508 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
364 for x in ${CFLAGS} ; do 509 export FFLAGS=$(test-flags-F77 ${FFLAGS})
365 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 510 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
366 done
367 for x in ${CXXFLAGS} ; do
368 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
369 done
370
371 export CFLAGS=${NEW_CFLAGS}
372 export CXXFLAGS=${NEW_CXXFLAGS}
373} 511}
374 512
513# @FUNCTION: get-flag
514# @USAGE: <flag>
515# @DESCRIPTION:
516# Find and echo the value for a particular flag. Accepts shell globs.
375get-flag() { 517get-flag() {
376 local f findflag="$1" 518 local f findflag="$1"
377 519
378 # this code looks a little flaky but seems to work for 520 # this code looks a little flaky but seems to work for
379 # everything we want ... 521 # everything we want ...
380 # for example, if CFLAGS="-march=i686": 522 # for example, if CFLAGS="-march=i686":
381 # `get-flag -march` == "-march=i686" 523 # `get-flag -march` == "-march=i686"
382 # `get-flag march` == "i686" 524 # `get-flag march` == "i686"
383 for f in ${CFLAGS} ${CXXFLAGS} ; do 525 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
384 if [ "${f/${findflag}}" != "${f}" ] ; then 526 if [ "${f/${findflag}}" != "${f}" ] ; then
385 printf "%s\n" "${f/-${findflag}=}" 527 printf "%s\n" "${f/-${findflag}=}"
386 return 0 528 return 0
387 fi 529 fi
388 done 530 done
389 return 1 531 return 1
390} 532}
391 533
392# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 534# DEAD FUNCS. Remove by Dec 2011.
393has_hardened() { 535test_flag() { die "$0: deprecated, please use test-flags()!" ; }
394 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 536has_hardened() { die "$0: deprecated, please use gcc-specs-{relro,now}()!" ; }
395
396 test_version_info Hardened && return 0
397 # The specs file wont exist unless gcc has GCC_SPECS support
398 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
399}
400
401# DEPRECATED - use gcc-specs-pie from toolchain-funcs
402# indicate whether PIC is set
403has_pic() {
404 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 537has_pic() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
405
406 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
407 ${CFLAGS/-fpic} != ${CFLAGS} || \
408 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
409}
410
411# DEPRECATED - use gcc-specs-pie from toolchain-funcs
412# indicate whether PIE is set
413has_pie() {
414 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 538has_pie() { die "$0: deprecated, please use gcc-specs-pie()!" ; }
415
416 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
417 ${CFLAGS/-fpie} != ${CFLAGS} || \
418 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \
419 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
420 # test PIC while waiting for specs to be updated to generate __PIE__
421}
422
423# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
424# indicate whether code for SSP is being generated for all functions
425has_ssp_all() {
426 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 539has_ssp_all() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
427
428 # note; this matches only -fstack-protector-all
429 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
430 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
431 gcc-specs-ssp
432}
433
434# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
435# indicate whether code for SSP is being generated
436has_ssp() {
437 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 540has_ssp() { die "$0: deprecated, please use gcc-specs-ssp()!" ; }
438 541
439 # note; this matches both -fstack-protector and -fstack-protector-all 542# @FUNCTION: has_m64
440 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 543# @DESCRIPTION:
441 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 544# This doesn't test if the flag is accepted, it tests if the flag actually
442 gcc-specs-ssp 545# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
443} 546# return code is 0, else the return code is 1.
444
445has_m64() { 547has_m64() {
446 # this doesnt test if the flag is accepted, it tests if the flag 548 # this doesnt test if the flag is accepted, it tests if the flag
447 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 549 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
448 # please dont replace this function with test_flag in some future 550 # please dont replace this function with test_flag in some future
449 # clean-up! 551 # clean-up!
456 rm -f "${temp}".c 558 rm -f "${temp}".c
457 [[ ${ret} != 1 ]] && return 0 559 [[ ${ret} != 1 ]] && return 0
458 return 1 560 return 1
459} 561}
460 562
563# @FUNCTION: has_m32
564# @DESCRIPTION:
565# This doesn't test if the flag is accepted, it tests if the flag actually
566# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
567# code is 0, else return code is 1.
461has_m32() { 568has_m32() {
462 # this doesnt test if the flag is accepted, it tests if the flag 569 # this doesnt test if the flag is accepted, it tests if the flag
463 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 570 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
464 # please dont replace this function with test_flag in some future 571 # please dont replace this function with test_flag in some future
465 # clean-up! 572 # clean-up!
474 rm -f "${temp}".c 581 rm -f "${temp}".c
475 [[ ${ret} != 1 ]] && return 0 582 [[ ${ret} != 1 ]] && return 0
476 return 1 583 return 1
477} 584}
478 585
586# @FUNCTION: replace-sparc64-flags
587# @DESCRIPTION:
588# Sets mcpu to v8 and uses the original value as mtune if none specified.
479replace-sparc64-flags() { 589replace-sparc64-flags() {
480 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 590 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
481 591
482 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 592 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
483 for x in ${SPARC64_CPUS}; do 593 for x in ${SPARC64_CPUS}; do
484 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 594 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
485 done 595 done
486 else 596 else
487 for x in ${SPARC64_CPUS}; do 597 for x in ${SPARC64_CPUS}; do
488 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 598 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
489 done 599 done
490 fi 600 fi
491 601
492 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 602 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
493 for x in ${SPARC64_CPUS}; do 603 for x in ${SPARC64_CPUS}; do
494 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 604 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
495 done 605 done
496 else 606 else
497 for x in ${SPARC64_CPUS}; do 607 for x in ${SPARC64_CPUS}; do
498 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 608 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
499 done 609 done
500 fi 610 fi
501 611
502 export CFLAGS CXXFLAGS 612 export CFLAGS CXXFLAGS
503} 613}
504 614
615# @FUNCTION: append-libs
616# @USAGE: <libs>
617# @DESCRIPTION:
618# Add extra <libs> to the current LIBS.
619append-libs() {
620 [[ -z $* ]] && return 0
621 local flag
622 for flag in "$@"; do
623 [[ ${flag} == -l* ]] && flag=${flag#-l}
624 export LIBS="${LIBS} -l${flag}"
625 done
626
627 return 0
628}
629
630# @FUNCTION: append-ldflags
631# @USAGE: <flags>
632# @DESCRIPTION:
633# Add extra <flags> to the current LDFLAGS.
505append-ldflags() { 634append-ldflags() {
635 [[ -z $* ]] && return 0
636 local flag
637 for flag in "$@"; do
638 [[ ${flag} == -l* ]] && \
639 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
640 done
641
506 export LDFLAGS="${LDFLAGS} $*" 642 export LDFLAGS="${LDFLAGS} $*"
507 return 0 643 return 0
508} 644}
509 645
646# @FUNCTION: filter-ldflags
647# @USAGE: <flags>
648# @DESCRIPTION:
649# Remove particular <flags> from LDFLAGS. Accepts shell globs.
510filter-ldflags() { 650filter-ldflags() {
511 local x 651 _filter-var LDFLAGS "$@"
512
513 # we do this fancy spacing stuff so as to not filter
514 # out part of a flag ... we want flag atoms ! :D
515 LDFLAGS=" ${LDFLAGS} "
516 for x in "$@" ; do
517 LDFLAGS=${LDFLAGS// ${x} / }
518 done
519 [[ -z ${LDFLAGS// } ]] \
520 && LDFLAGS="" \
521 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
522 export LDFLAGS
523 return 0 652 return 0
524} 653}
525 654
655# @FUNCTION: raw-ldflags
656# @USAGE: <flags>
657# @DESCRIPTION:
526# Turn C style ldflags (-Wl,-foo) into straight ldflags 658# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
659# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
660# to gcc where it needs the '-Wl,'.
527raw-ldflags() { 661raw-ldflags() {
528 local x input="$@" 662 local x input="$@"
529 [[ -z ${input} ]] && input=${LDFLAGS} 663 [[ -z ${input} ]] && input=${LDFLAGS}
530 set -- 664 set --
531 for x in ${input} ; do 665 for x in ${input} ; do
533 set -- "$@" ${x//,/ } 667 set -- "$@" ${x//,/ }
534 done 668 done
535 echo "$@" 669 echo "$@"
536} 670}
537 671
538fstack-flags() { 672# @FUNCTION: no-as-needed
539 if gcc-specs-ssp; then 673# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
540 [ -z "`is-flag -fno-stack-protector`" ] && 674no-as-needed() {
541 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 675 case $($(tc-getLD) -v 2>&1 </dev/null) in
542 fi 676 *GNU*) # GNU ld
543 return 0 677 echo "-Wl,--no-as-needed" ;;
678 esac
544} 679}
545 680
546# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 681# Some tests for when we screw with things and want to make
547# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 682# sure we didn't break anything
548# fixes. 683#TESTS() {
684# CFLAGS="-a -b -c=1"
685# CXXFLAGS="-x -y -z=2"
686# LDFLAGS="-l -m -n=3"
549# 687#
550# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 688# die() { exit 1; }
551gcc2-flags() { 689# (is-flag 1 2 3) && die
552 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 690# (is-ldflag 1 2 3) && die
553 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 691#
554 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 692# is-flagq -l && die
555 fi 693# is-ldflagq -a && die
556 694# is-flagq -a || die
557 replace-cpu-flags k6-{2,3} k6 695# is-flagq -x || die
558 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 696# is-ldflagq -n=* || die
559 697# is-ldflagq -n && die
560 replace-cpu-flags pentium-mmx i586 698#
561 replace-cpu-flags pentium{2,3,4} i686 699# strip-unsupported-flags
562 700# [[ ${CFLAGS} == "-c=1" ]] || die
563 replace-cpu-flags ev6{7,8} ev6 701# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
564 702#
565 export CFLAGS CXXFLAGS 703# echo "All tests pass"
566} 704#}
567 705#TESTS
568# Gets the flags needed for "NOW" binding
569bindnow-flags() {
570 case $($(tc-getLD) -v 2>&1 </dev/null) in
571 *GNU* | *'with BFD'*) # GNU ld
572 echo "-Wl,-z,now" ;;
573 *Apple*) # Darwin ld
574 echo "-bind_at_load" ;;
575 *)
576 # Some linkers just recognize -V instead of -v
577 case $($(tc-getLD) -V 2>&1 </dev/null) in
578 *Solaris*) # Solaris accept almost the same GNU options
579 echo "-Wl,-z,now" ;;
580 esac
581 ;;
582 esac
583}

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