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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 1.139 2009/06/09 22:15:43 dirtyepic 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"
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="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 \
47 -mno-sse4.2 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow \
48 -mno-popcnt -mno-abm \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 49 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 50 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 51 -mieee -mieee-with-inexact -mschedule \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 52 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 53 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 54 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 55 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
56 -msecure-plt -m*-toc -D* -U*"
115 57
116 # C[XX]FLAGS that we are think is ok, but needs testing 58 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 59 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 60 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 61 return 0
120} 62}
121 63
64# inverted filters for hardened compiler. This is trying to unpick
65# the hardened compiler defaults.
66_filter-hardened() {
67 local f
68 for f in "$@" ; do
69 case "${f}" in
70 # Ideally we should only concern ourselves with PIE flags,
71 # not -fPIC or -fpic, but too many places filter -fPIC without
72 # thinking about -fPIE.
73 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
74 gcc-specs-pie || continue
75 is-flagq -nopie || append-flags -nopie;;
76 -fstack-protector)
77 gcc-specs-ssp || continue
78 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
79 -fstack-protector-all)
80 gcc-specs-ssp-to-all || continue
81 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
82 -fno-strict-overflow)
83 gcc-specs-nostrict || continue
84 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
85 esac
86 done
87}
88
89# Remove occurrences of strings from variable given in $1
90# Strings removed are matched as globs, so for example
91# '-O*' would remove -O1, -O2 etc.
92_filter-var() {
93 local f x VAR VAL
94 declare -a new
95
96 VAR=$1
97 shift
98 eval VAL=\${${VAR}}
99 for f in ${VAL}; do
100 for x in "$@"; do
101 # Note this should work with globs like -O*
102 [[ ${f} == ${x} ]] && continue 2
103 done
104 eval new\[\${\#new\[@]}]=\${f}
105 done
106 eval export ${VAR}=\${new\[*]}
107}
108
109# @FUNCTION: filter-flags
110# @USAGE: <flags>
111# @DESCRIPTION:
112# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
122filter-flags() { 113filter-flags() {
123 local x f fset 114 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 115 _filter-var CFLAGS "$@"
125 116 _filter-var CPPFLAGS "$@"
126 for x in "$@" ; do 117 _filter-var CXXFLAGS "$@"
127 case "${x}" in 118 _filter-var FFLAGS "$@"
128 -fPIC|-fpic|-fPIE|-fpie|-pie) 119 _filter-var FCFLAGS "$@"
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 0 120 return 0
151} 121}
152 122
123# @FUNCTION: filter-lfs-flags
124# @DESCRIPTION:
125# Remove flags that enable Large File Support.
153filter-lfs-flags() { 126filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 127 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
155 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 128 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
156} 129}
157 130
131# @FUNCTION: append-cppflags
132# @USAGE: <flags>
133# @DESCRIPTION:
134# Add extra <flags> to the current CPPFLAGS.
135append-cppflags() {
136 [[ -z $* ]] && return 0
137 export CPPFLAGS="${CPPFLAGS} $*"
138 return 0
139}
140
141# @FUNCTION: append-cflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CFLAGS.
145append-cflags() {
146 [[ -z $* ]] && return 0
147 export CFLAGS="${CFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cxxflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CXXFLAGS.
155append-cxxflags() {
156 [[ -z $* ]] && return 0
157 export CXXFLAGS="${CXXFLAGS} $*"
158 return 0
159}
160
161# @FUNCTION: append-fflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current {F,FC}FLAGS.
165append-fflags() {
166 [[ -z $* ]] && return 0
167 export FFLAGS="${FFLAGS} $*"
168 export FCFLAGS="${FCFLAGS} $*"
169 return 0
170}
171
172# @FUNCTION: append-lfs-flags
173# @DESCRIPTION:
174# Add flags that enable Large File Support.
158append-lfs-flags() { 175append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 176 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
160 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 177 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
161} 178}
162 179
180# @FUNCTION: append-flags
181# @USAGE: <flags>
182# @DESCRIPTION:
183# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
163append-flags() { 184append-flags() {
164 [[ -z $* ]] && return 0 185 [[ -z $* ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 186 append-cflags "$@"
166 export CXXFLAGS="${CXXFLAGS} $*" 187 append-cxxflags "$@"
167 [ -n "`is-flag -fno-stack-protector`" -o \ 188 append-fflags "$@"
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
169 return 0 189 return 0
170} 190}
171 191
192# @FUNCTION: replace-flags
193# @USAGE: <old> <new>
194# @DESCRIPTION:
195# Replace the <old> flag with <new>. Accepts shell globs for <old>.
172replace-flags() { 196replace-flags() {
173 [[ $# != 2 ]] \ 197 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 198 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#" 199 && die "replace-flags takes 2 arguments, not $#"
176 200
177 local f fset 201 local f fset
178 declare -a new_CFLAGS new_CXXFLAGS 202 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
179 203
180 for fset in CFLAGS CXXFLAGS; do 204 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
181 # Looping over the flags instead of using a global 205 # Looping over the flags instead of using a global
182 # substitution ensures that we're working with flag atoms. 206 # substitution ensures that we're working with flag atoms.
183 # Otherwise globs like -O* have the potential to wipe out the 207 # Otherwise globs like -O* have the potential to wipe out the
184 # list of flags. 208 # list of flags.
185 for f in ${!fset}; do 209 for f in ${!fset}; do
191 done 215 done
192 216
193 return 0 217 return 0
194} 218}
195 219
220# @FUNCTION: replace-cpu-flags
221# @USAGE: <old> <new>
222# @DESCRIPTION:
223# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
224# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 225replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 226 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 227 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 228 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 229 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 230 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 231 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 232 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 233 shift
205 done 234 done
206 return 0 235 return 0
207} 236}
208 237
238_is_flagq() {
239 local x
240 for x in ${!1} ; do
241 [[ ${x} == $2 ]] && return 0
242 done
243 return 1
244}
245
246# @FUNCTION: is-flagq
247# @USAGE: <flag>
248# @DESCRIPTION:
249# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
250is-flagq() {
251 [[ -n $2 ]] && die "Usage: is-flag <flag>"
252 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
253}
254
255# @FUNCTION: is-flag
256# @USAGE: <flag>
257# @DESCRIPTION:
258# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 259is-flag() {
210 local x 260 is-flagq "$@" && 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} 261}
221 262
263# @FUNCTION: is-ldflagq
264# @USAGE: <flag>
265# @DESCRIPTION:
266# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
267is-ldflagq() {
268 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
269 _is_flagq LDFLAGS $1
270}
271
272# @FUNCTION: is-ldflag
273# @USAGE: <flag>
274# @DESCRIPTION:
275# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
276is-ldflag() {
277 is-ldflagq "$@" && echo true
278}
279
280# @FUNCTION: filter-mfpmath
281# @USAGE: <math types>
282# @DESCRIPTION:
283# Remove specified math types from the fpmath flag. For example, if the user
284# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
285# -mfpmath=386.
222filter-mfpmath() { 286filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 287 local orig_mfpmath new_math prune_math
224 288
225 # save the original -mfpmath flag 289 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 290 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 291 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 292 new_math=$(get-flag mfpmath)
293 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 294 # figure out which math values are to be removed
230 prune_math="" 295 prune_math=""
231 for prune_math in "$@" ; do 296 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 297 new_math=${new_math/ ${prune_math} / }
233 done 298 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 299 new_math=$(echo ${new_math})
300 new_math=${new_math// /,}
235 301
236 if [ -z "${new_math}" ] ; then 302 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 303 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 304 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 305 filter-flags ${orig_mfpmath}
240 else 306 else
241 # if we only want to filter some of the user specified 307 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 309 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 310 fi
245 return 0 311 return 0
246} 312}
247 313
314# @FUNCTION: strip-flags
315# @DESCRIPTION:
316# Strip C[XX]FLAGS of everything except known good/safe flags.
248strip-flags() { 317strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 318 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
250 319
251 setup-allowed-flags 320 setup-allowed-flags
252 321
253 local NEW_CFLAGS="" 322 local NEW_CFLAGS=""
254 local NEW_CXXFLAGS="" 323 local NEW_CXXFLAGS=""
324 local NEW_FFLAGS=""
325 local NEW_FCFLAGS=""
255 326
256 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 327 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 328 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 329 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
259 fi 330 fi
278 break 349 break
279 fi 350 fi
280 done 351 done
281 done 352 done
282 353
354 for x in ${FFLAGS}; do
355 for y in ${ALLOWED_FLAGS}; do
356 flag=${x%%=*}
357 if [ "${flag%%${y}}" = "" ] ; then
358 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
359 break
360 fi
361 done
362 done
363
364 for x in ${FCFLAGS}; do
365 for y in ${ALLOWED_FLAGS}; do
366 flag=${x%%=*}
367 if [ "${flag%%${y}}" = "" ] ; then
368 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
369 break
370 fi
371 done
372 done
373
283 # In case we filtered out all optimization flags fallback to -O2 374 # In case we filtered out all optimization flags fallback to -O2
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 375 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
285 NEW_CFLAGS="${NEW_CFLAGS} -O2" 376 NEW_CFLAGS="${NEW_CFLAGS} -O2"
286 fi 377 fi
287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 378 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 379 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
289 fi 380 fi
381 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
382 NEW_FFLAGS="${NEW_FFLAGS} -O2"
383 fi
384 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
385 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
386 fi
290 387
291 set +f # re-enable pathname expansion 388 set +f # re-enable pathname expansion
292 389
293 export CFLAGS="${NEW_CFLAGS}" 390 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}" 391 export CXXFLAGS="${NEW_CXXFLAGS}"
392 export FFLAGS="${NEW_FFLAGS}"
393 export FCFLAGS="${NEW_FCFLAGS}"
295 return 0 394 return 0
296} 395}
297 396
298test-flag-PROG() { 397test-flag-PROG() {
299 local comp=$1 398 local comp=$1
305 local PROG=$(tc-get${comp}) 404 local PROG=$(tc-get${comp})
306 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 405 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
307 > /dev/null 2>&1 406 > /dev/null 2>&1
308} 407}
309 408
310# Returns true if C compiler support given flag 409# @FUNCTION: test-flag-CC
410# @USAGE: <flag>
411# @DESCRIPTION:
412# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
311test-flag-CC() { test-flag-PROG "CC" "$1"; } 413test-flag-CC() { test-flag-PROG "CC" "$1"; }
312 414
313# Returns true if C++ compiler support given flag 415# @FUNCTION: test-flag-CXX
416# @USAGE: <flag>
417# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 419test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
420
421# @FUNCTION: test-flag-F77
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
425test-flag-F77() { test-flag-PROG "F77" "$1"; }
426
427# @FUNCTION: test-flag-FC
428# @USAGE: <flag>
429# @DESCRIPTION:
430# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
431test-flag-FC() { test-flag-PROG "FC" "$1"; }
315 432
316test-flags-PROG() { 433test-flags-PROG() {
317 local comp=$1 434 local comp=$1
318 local flags 435 local flags
319 local x 436 local x
320 437
321 shift 438 shift
322 439
323 [[ -z ${comp} ]] && \ 440 [[ -z ${comp} ]] && return 1
324 return 1
325 441
442 x=""
326 for x in "$@" ; do 443 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}" 444 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
328 done 445 done
329 446
330 echo "${flags}" 447 echo "${flags}"
331 448
332 # Just bail if we dont have any flags 449 # Just bail if we dont have any flags
333 [[ -n ${flags} ]] 450 [[ -n ${flags} ]]
334} 451}
335 452
336# Returns (echo's) the given flags supported by the C compiler 453# @FUNCTION: test-flags-CC
454# @USAGE: <flags>
455# @DESCRIPTION:
456# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
337test-flags-CC() { test-flags-PROG "CC" "$@"; } 457test-flags-CC() { test-flags-PROG "CC" "$@"; }
338 458
339# Returns (echo's) the given flags supported by the C++ compiler 459# @FUNCTION: test-flags-CXX
460# @USAGE: <flags>
461# @DESCRIPTION:
462# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
340test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 463test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
341 464
465# @FUNCTION: test-flags-F77
466# @USAGE: <flags>
467# @DESCRIPTION:
468# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
469test-flags-F77() { test-flags-PROG "F77" "$@"; }
470
471# @FUNCTION: test-flags-FC
472# @USAGE: <flags>
473# @DESCRIPTION:
474# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
475test-flags-FC() { test-flags-PROG "FC" "$@"; }
476
477# @FUNCTION: test-flags
478# @USAGE: <flags>
479# @DESCRIPTION:
342# Short-hand that should hopefully work for both C and C++ compiler, but 480# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination. 481# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; } 482test-flags() { test-flags-CC "$@"; }
345 483
346# Deprecated, use test-flags() 484# @FUNCTION: test_flag
485# @DESCRIPTION:
486# DEPRICIATED, use test-flags()
347test_flag() { 487test_flag() {
348 ewarn "test_flag: deprecated, please use test-flags()!" >&2 488 ewarn "test_flag: deprecated, please use test-flags()!" >&2
349 489
350 test-flags-CC "$@" 490 test-flags-CC "$@"
351} 491}
352 492
493# @FUNCTION: test_version_info
494# @USAGE: <version>
495# @DESCRIPTION:
496# Returns shell true if the current C compiler version matches <version>, else returns shell false.
497# Accepts shell globs.
353test_version_info() { 498test_version_info() {
354 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 499 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
355 return 0 500 return 0
356 else 501 else
357 return 1 502 return 1
358 fi 503 fi
359} 504}
360 505
506# @FUNCTION: strip-unsupported-flags
507# @DESCRIPTION:
508# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
361strip-unsupported-flags() { 509strip-unsupported-flags() {
362 local x NEW_CFLAGS NEW_CXXFLAGS 510 export CFLAGS=$(test-flags-CC ${CFLAGS})
363 511 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
364 for x in ${CFLAGS} ; do 512 export FFLAGS=$(test-flags-F77 ${FFLAGS})
365 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 513 export FCFLAGS=$(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} 514}
374 515
516# @FUNCTION: get-flag
517# @USAGE: <flag>
518# @DESCRIPTION:
519# Find and echo the value for a particular flag. Accepts shell globs.
375get-flag() { 520get-flag() {
376 local f findflag="$1" 521 local f findflag="$1"
377 522
378 # this code looks a little flaky but seems to work for 523 # this code looks a little flaky but seems to work for
379 # everything we want ... 524 # everything we want ...
380 # for example, if CFLAGS="-march=i686": 525 # for example, if CFLAGS="-march=i686":
381 # `get-flag -march` == "-march=i686" 526 # `get-flag -march` == "-march=i686"
382 # `get-flag march` == "i686" 527 # `get-flag march` == "i686"
383 for f in ${CFLAGS} ${CXXFLAGS} ; do 528 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
384 if [ "${f/${findflag}}" != "${f}" ] ; then 529 if [ "${f/${findflag}}" != "${f}" ] ; then
385 printf "%s\n" "${f/-${findflag}=}" 530 printf "%s\n" "${f/-${findflag}=}"
386 return 0 531 return 0
387 fi 532 fi
388 done 533 done
389 return 1 534 return 1
390} 535}
391 536
537# @FUNCTION: has_hardened
538# @DESCRIPTION:
392# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 539# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
393has_hardened() { 540has_hardened() {
394 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 541 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
395 542
396 test_version_info Hardened && return 0 543 test_version_info Hardened && return 0
397 # The specs file wont exist unless gcc has GCC_SPECS support 544 # The specs file wont exist unless gcc has GCC_SPECS support
398 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 545 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
399} 546}
400 547
548# @FUNCTION: has_pic
549# @DESCRIPTION:
401# DEPRECATED - use gcc-specs-pie from toolchain-funcs 550# DEPRECATED - use gcc-specs-pie from toolchain-funcs
402# indicate whether PIC is set 551# indicate whether PIC is set
403has_pic() { 552has_pic() {
404 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 553 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
405 554
406 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 555 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
407 ${CFLAGS/-fpic} != ${CFLAGS} || \ 556 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
408 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]] 557 gcc-specs-pie
409} 558}
410 559
560# @FUNCTION: has_pie
561# @DESCRIPTION:
411# DEPRECATED - use gcc-specs-pie from toolchain-funcs 562# DEPRECATED - use gcc-specs-pie from toolchain-funcs
412# indicate whether PIE is set 563# indicate whether PIE is set
413has_pie() { 564has_pie() {
414 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 565 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
415 566
416 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 567 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
417 ${CFLAGS/-fpie} != ${CFLAGS} || \ 568 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
418 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \ 569 gcc-specs-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} 570}
422 571
572# @FUNCTION: has_ssp_all
573# @DESCRIPTION:
423# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 574# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
424# indicate whether code for SSP is being generated for all functions 575# indicate whether code for SSP is being generated for all functions
425has_ssp_all() { 576has_ssp_all() {
426 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 577 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
427 578
428 # note; this matches only -fstack-protector-all 579 # note; this matches only -fstack-protector-all
429 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 580 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
430 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 581 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
431 gcc-specs-ssp 582 gcc-specs-ssp-to-all
432} 583}
433 584
585# @FUNCTION: has_ssp
586# @DESCRIPTION:
434# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 587# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
435# indicate whether code for SSP is being generated 588# indicate whether code for SSP is being generated
436has_ssp() { 589has_ssp() {
437 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 590 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
438 591
440 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 593 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
441 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 594 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
442 gcc-specs-ssp 595 gcc-specs-ssp
443} 596}
444 597
598# @FUNCTION: has_m64
599# @DESCRIPTION:
600# This doesn't test if the flag is accepted, it tests if the flag actually
601# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
602# return code is 0, else the return code is 1.
445has_m64() { 603has_m64() {
446 # this doesnt test if the flag is accepted, it tests if the flag 604 # this doesnt test if the flag is accepted, it tests if the flag
447 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 605 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
448 # please dont replace this function with test_flag in some future 606 # please dont replace this function with test_flag in some future
449 # clean-up! 607 # clean-up!
456 rm -f "${temp}".c 614 rm -f "${temp}".c
457 [[ ${ret} != 1 ]] && return 0 615 [[ ${ret} != 1 ]] && return 0
458 return 1 616 return 1
459} 617}
460 618
619# @FUNCTION: has_m32
620# @DESCRIPTION:
621# This doesn't test if the flag is accepted, it tests if the flag actually
622# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
623# code is 0, else return code is 1.
461has_m32() { 624has_m32() {
462 # this doesnt test if the flag is accepted, it tests if the flag 625 # this doesnt test if the flag is accepted, it tests if the flag
463 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 626 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
464 # please dont replace this function with test_flag in some future 627 # please dont replace this function with test_flag in some future
465 # clean-up! 628 # clean-up!
474 rm -f "${temp}".c 637 rm -f "${temp}".c
475 [[ ${ret} != 1 ]] && return 0 638 [[ ${ret} != 1 ]] && return 0
476 return 1 639 return 1
477} 640}
478 641
642# @FUNCTION: replace-sparc64-flags
643# @DESCRIPTION:
644# Sets mcpu to v8 and uses the original value as mtune if none specified.
479replace-sparc64-flags() { 645replace-sparc64-flags() {
480 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 646 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
481 647
482 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 648 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
483 for x in ${SPARC64_CPUS}; do 649 for x in ${SPARC64_CPUS}; do
484 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 650 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
485 done 651 done
486 else 652 else
487 for x in ${SPARC64_CPUS}; do 653 for x in ${SPARC64_CPUS}; do
488 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 654 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
489 done 655 done
490 fi 656 fi
491 657
492 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 658 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
493 for x in ${SPARC64_CPUS}; do 659 for x in ${SPARC64_CPUS}; do
494 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 660 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
495 done 661 done
496 else 662 else
497 for x in ${SPARC64_CPUS}; do 663 for x in ${SPARC64_CPUS}; do
498 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 664 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
499 done 665 done
500 fi 666 fi
501 667
502 export CFLAGS CXXFLAGS 668 export CFLAGS CXXFLAGS
503} 669}
504 670
671# @FUNCTION: append-ldflags
672# @USAGE: <flags>
673# @DESCRIPTION:
674# Add extra <flags> to the current LDFLAGS.
505append-ldflags() { 675append-ldflags() {
676 [[ -z $* ]] && return 0
677 local flag
678 for flag in "$@"; do
679 [[ ${flag} == -l* ]] && \
680 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
681 done
682
506 export LDFLAGS="${LDFLAGS} $*" 683 export LDFLAGS="${LDFLAGS} $*"
507 return 0 684 return 0
508} 685}
509 686
687# @FUNCTION: filter-ldflags
688# @USAGE: <flags>
689# @DESCRIPTION:
690# Remove particular <flags> from LDFLAGS. Accepts shell globs.
510filter-ldflags() { 691filter-ldflags() {
511 local x 692 _filter-var LDFLAGS "$@"
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:${#LDFLAGS}-2}
522 export LDFLAGS
523 return 0 693 return 0
524} 694}
525 695
696# @FUNCTION: raw-ldflags
697# @USAGE: <flags>
698# @DESCRIPTION:
526# Turn C style ldflags (-Wl,-foo) into straight ldflags 699# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
700# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
701# to gcc where it needs the '-Wl,'.
527raw-ldflags() { 702raw-ldflags() {
528 local x input="$@" 703 local x input="$@"
529 [[ -z ${input} ]] && input=${LDFLAGS} 704 [[ -z ${input} ]] && input=${LDFLAGS}
530 set -- 705 set --
531 for x in ${input} ; do 706 for x in ${input} ; do
533 set -- "$@" ${x//,/ } 708 set -- "$@" ${x//,/ }
534 done 709 done
535 echo "$@" 710 echo "$@"
536} 711}
537 712
538fstack-flags() { 713# @FUNCTION: bindnow-flags
539 if gcc-specs-ssp; then 714# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
540 [ -z "`is-flag -fno-stack-protector`" ] && 715# @DESCRIPTION:
541 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 716# DEPRECATED - Gets the flags needed for "NOW" binding
542 fi 717bindnow-flags() {
543 return 0 718 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
544} 719}
545 720
546# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 721
547# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 722# Some tests for when we screw with things and want to make
548# fixes. 723# sure we didn't break anything
724#TESTS() {
725# CFLAGS="-a -b -c=1"
726# CXXFLAGS="-x -y -z=2"
727# LDFLAGS="-l -m -n=3"
549# 728#
550# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 729# die() { exit 1; }
551gcc2-flags() { 730# (is-flag 1 2 3) && die
552 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 731# (is-ldflag 1 2 3) && die
553 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 732#
554 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 733# is-flagq -l && die
555 fi 734# is-ldflagq -a && die
556 735# is-flagq -a || die
557 replace-cpu-flags k6-{2,3} k6 736# is-flagq -x || die
558 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 737# is-ldflagq -n=* || die
559 738# is-ldflagq -n && die
560 replace-cpu-flags pentium-mmx i586 739#
561 replace-cpu-flags pentium{2,3,4} i686 740# strip-unsupported-flags
562 741# [[ ${CFLAGS} == "-c=1" ]] || die
563 replace-cpu-flags ev6{7,8} ev6 742# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
564 743#
565 export CFLAGS CXXFLAGS 744# echo "All tests pass"
566} 745#}
567 746#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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