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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 1.133 2009/04/04 17:57:54 grobian 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="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow"
106 ALLOWED_FLAGS="${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-3dnow \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 49 -mieee -mieee-with-inexact -mschedule \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -m*-toc -D* -U*"
55
56 # killing these two on OSX/Intel will disable SSE, resulting in failing
57 # compilations, as the headers expect SSE to be enabled (Apple knows what
58 # hardware they run on afterall, don't they?)
59 [[ ${CHOST} == i?86-apple-darwin* ]] \
60 && ALLOWED_FLAGS="${ALLOWED_FLAGS} -march=prescott -march=nocona"
115 61
116 # C[XX]FLAGS that we are think is ok, but needs testing 62 # {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 63 # NOTE: currently -Os have issues with gcc3 and K6* arch's
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 64 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
119 return 0 65 return 0
120} 66}
121 67
68# inverted filters for hardened compiler. This is trying to unpick
69# the hardened compiler defaults.
70_filter-hardened() {
71 local f
72 for f in "$@" ; do
73 case "${f}" in
74 # Ideally we should only concern ourselves with PIE flags,
75 # not -fPIC or -fpic, but too many places filter -fPIC without
76 # thinking about -fPIE.
77 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
78 gcc-specs-pie || continue
79 is-flagq -nopie || append-flags -nopie;;
80 -fstack-protector)
81 gcc-specs-ssp || continue
82 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
83 -fstack-protector-all)
84 gcc-specs-ssp-to-all || continue
85 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
86 -fno-strict-overflow)
87 gcc-specs-nostrict || continue
88 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
89 esac
90 done
91}
92
93# Remove occurrences of strings from variable given in $1
94# Strings removed are matched as globs, so for example
95# '-O*' would remove -O1, -O2 etc.
96_filter-var() {
97 local f x VAR VAL
98 declare -a new
99
100 VAR=$1
101 shift
102 eval VAL=\${${VAR}}
103 for f in ${VAL}; do
104 for x in "$@"; do
105 # Note this should work with globs like -O*
106 [[ ${f} == ${x} ]] && continue 2
107 done
108 eval new\[\${\#new\[@]}]=\${f}
109 done
110 eval export ${VAR}=\${new\[*]}
111}
112
113# @FUNCTION: filter-flags
114# @USAGE: <flags>
115# @DESCRIPTION:
116# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
122filter-flags() { 117filter-flags() {
123 local x f fset 118 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 119 _filter-var CFLAGS "$@"
125 120 _filter-var CPPFLAGS "$@"
126 for x in "$@" ; do 121 _filter-var CXXFLAGS "$@"
127 case "${x}" in 122 _filter-var FFLAGS "$@"
128 -fPIC|-fpic|-fPIE|-fpie|-pie) 123 _filter-var FCFLAGS "$@"
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 0 124 return 0
151} 125}
152 126
127# @FUNCTION: filter-lfs-flags
128# @DESCRIPTION:
129# Remove flags that enable Large File Support.
153filter-lfs-flags() { 130filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 131 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
155 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 132 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
156} 133}
157 134
135# @FUNCTION: append-cppflags
136# @USAGE: <flags>
137# @DESCRIPTION:
138# Add extra <flags> to the current CPPFLAGS.
139append-cppflags() {
140 [[ -z $* ]] && return 0
141 export CPPFLAGS="${CPPFLAGS} $*"
142 return 0
143}
144
145# @FUNCTION: append-cxxflags
146# @USAGE: <flags>
147# @DESCRIPTION:
148# Add extra <flags> to the current CXXFLAGS.
149append-cxxflags() {
150 [[ -z $* ]] && return 0
151 export CXXFLAGS="${CXXFLAGS} $*"
152 return 0
153}
154
155# @FUNCTION: append-fflags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to the current {F,FC}FLAGS.
159append-fflags() {
160 [[ -z $* ]] && return 0
161 export FFLAGS="${FFLAGS} $*"
162 export FCFLAGS="${FCFLAGS} $*"
163 return 0
164}
165
166# @FUNCTION: append-lfs-flags
167# @DESCRIPTION:
168# Add flags that enable Large File Support.
158append-lfs-flags() { 169append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 170 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
160 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 171 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
161} 172}
162 173
174# @FUNCTION: append-flags
175# @USAGE: <flags>
176# @DESCRIPTION:
177# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
163append-flags() { 178append-flags() {
164 [[ -z $* ]] && return 0 179 [[ -z $* ]] && return 0
165 export CFLAGS="${CFLAGS} $*" 180 export CFLAGS="${CFLAGS} $*"
166 export CXXFLAGS="${CXXFLAGS} $*" 181 export CXXFLAGS="${CXXFLAGS} $*"
167 [ -n "`is-flag -fno-stack-protector`" -o \ 182 export FFLAGS="${FFLAGS} $*"
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 183 export FCFLAGS="${FCFLAGS} $*"
169 return 0 184 return 0
170} 185}
171 186
187# @FUNCTION: replace-flags
188# @USAGE: <old> <new>
189# @DESCRIPTION:
190# Replace the <old> flag with <new>. Accepts shell globs for <old>.
172replace-flags() { 191replace-flags() {
173 [[ $# != 2 ]] \ 192 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 193 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#" 194 && die "replace-flags takes 2 arguments, not $#"
176 195
177 local f fset 196 local f fset
178 declare -a new_CFLAGS new_CXXFLAGS 197 declare -a new_CFLAGS new_CXXFLAGS new_FFLAGS new_FCFLAGS
179 198
180 for fset in CFLAGS CXXFLAGS; do 199 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
181 # Looping over the flags instead of using a global 200 # Looping over the flags instead of using a global
182 # substitution ensures that we're working with flag atoms. 201 # substitution ensures that we're working with flag atoms.
183 # Otherwise globs like -O* have the potential to wipe out the 202 # Otherwise globs like -O* have the potential to wipe out the
184 # list of flags. 203 # list of flags.
185 for f in ${!fset}; do 204 for f in ${!fset}; do
191 done 210 done
192 211
193 return 0 212 return 0
194} 213}
195 214
215# @FUNCTION: replace-cpu-flags
216# @USAGE: <old> <new>
217# @DESCRIPTION:
218# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
219# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 220replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 221 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 222 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 223 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 224 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 225 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 226 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 227 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 228 shift
205 done 229 done
206 return 0 230 return 0
207} 231}
208 232
233_is_flagq() {
234 local x
235 for x in ${!1} ; do
236 [[ ${x} == $2 ]] && return 0
237 done
238 return 1
239}
240
241# @FUNCTION: is-flagq
242# @USAGE: <flag>
243# @DESCRIPTION:
244# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
245is-flagq() {
246 [[ -n $2 ]] && die "Usage: is-flag <flag>"
247 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
248}
249
250# @FUNCTION: is-flag
251# @USAGE: <flag>
252# @DESCRIPTION:
253# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 254is-flag() {
210 local x 255 is-flagq "$@" && 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} 256}
221 257
258# @FUNCTION: is-ldflagq
259# @USAGE: <flag>
260# @DESCRIPTION:
261# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
262is-ldflagq() {
263 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
264 _is_flagq LDFLAGS $1
265}
266
267# @FUNCTION: is-ldflag
268# @USAGE: <flag>
269# @DESCRIPTION:
270# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
271is-ldflag() {
272 is-ldflagq "$@" && echo true
273}
274
275# @FUNCTION: filter-mfpmath
276# @USAGE: <math types>
277# @DESCRIPTION:
278# Remove specified math types from the fpmath flag. For example, if the user
279# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
280# -mfpmath=386.
222filter-mfpmath() { 281filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 282 local orig_mfpmath new_math prune_math
224 283
225 # save the original -mfpmath flag 284 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 285 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 286 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 287 new_math=$(get-flag mfpmath)
288 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 289 # figure out which math values are to be removed
230 prune_math="" 290 prune_math=""
231 for prune_math in "$@" ; do 291 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 292 new_math=${new_math/ ${prune_math} / }
233 done 293 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 294 new_math=$(echo ${new_math})
295 new_math=${new_math// /,}
235 296
236 if [ -z "${new_math}" ] ; then 297 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 298 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 299 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 300 filter-flags ${orig_mfpmath}
240 else 301 else
241 # if we only want to filter some of the user specified 302 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 304 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 305 fi
245 return 0 306 return 0
246} 307}
247 308
309# @FUNCTION: strip-flags
310# @DESCRIPTION:
311# Strip C[XX]FLAGS of everything except known good/safe flags.
248strip-flags() { 312strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 313 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
250 314
251 setup-allowed-flags 315 setup-allowed-flags
252 316
253 local NEW_CFLAGS="" 317 local NEW_CFLAGS=""
254 local NEW_CXXFLAGS="" 318 local NEW_CXXFLAGS=""
319 local NEW_FFLAGS=""
320 local NEW_FCFLAGS=""
255 321
256 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 322 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 323 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 324 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
259 fi 325 fi
278 break 344 break
279 fi 345 fi
280 done 346 done
281 done 347 done
282 348
349 for x in ${FFLAGS}; do
350 for y in ${ALLOWED_FLAGS}; do
351 flag=${x%%=*}
352 if [ "${flag%%${y}}" = "" ] ; then
353 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
354 break
355 fi
356 done
357 done
358
359 for x in ${FCFLAGS}; do
360 for y in ${ALLOWED_FLAGS}; do
361 flag=${x%%=*}
362 if [ "${flag%%${y}}" = "" ] ; then
363 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
364 break
365 fi
366 done
367 done
368
283 # In case we filtered out all optimization flags fallback to -O2 369 # In case we filtered out all optimization flags fallback to -O2
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 370 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
285 NEW_CFLAGS="${NEW_CFLAGS} -O2" 371 NEW_CFLAGS="${NEW_CFLAGS} -O2"
286 fi 372 fi
287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 373 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 374 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
289 fi 375 fi
376 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
377 NEW_FFLAGS="${NEW_FFLAGS} -O2"
378 fi
379 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
380 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
381 fi
290 382
291 set +f # re-enable pathname expansion 383 set +f # re-enable pathname expansion
292 384
293 export CFLAGS="${NEW_CFLAGS}" 385 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}" 386 export CXXFLAGS="${NEW_CXXFLAGS}"
387 export FFLAGS="${NEW_FFLAGS}"
388 export FCFLAGS="${NEW_FCFLAGS}"
295 return 0 389 return 0
296} 390}
297 391
298test-flag-PROG() { 392test-flag-PROG() {
299 local comp=$1 393 local comp=$1
305 local PROG=$(tc-get${comp}) 399 local PROG=$(tc-get${comp})
306 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 400 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
307 > /dev/null 2>&1 401 > /dev/null 2>&1
308} 402}
309 403
310# Returns true if C compiler support given flag 404# @FUNCTION: test-flag-CC
405# @USAGE: <flag>
406# @DESCRIPTION:
407# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
311test-flag-CC() { test-flag-PROG "CC" "$1"; } 408test-flag-CC() { test-flag-PROG "CC" "$1"; }
312 409
313# Returns true if C++ compiler support given flag 410# @FUNCTION: test-flag-CXX
411# @USAGE: <flag>
412# @DESCRIPTION:
413# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 414test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
415
416# @FUNCTION: test-flag-F77
417# @USAGE: <flag>
418# @DESCRIPTION:
419# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
420test-flag-F77() { test-flag-PROG "F77" "$1"; }
421
422# @FUNCTION: test-flag-FC
423# @USAGE: <flag>
424# @DESCRIPTION:
425# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
426test-flag-FC() { test-flag-PROG "FC" "$1"; }
315 427
316test-flags-PROG() { 428test-flags-PROG() {
317 local comp=$1 429 local comp=$1
318 local flags 430 local flags
319 local x 431 local x
320 432
321 shift 433 shift
322 434
323 [[ -z ${comp} ]] && \ 435 [[ -z ${comp} ]] && return 1
324 return 1
325 436
437 x=""
326 for x in "$@" ; do 438 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}" 439 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
328 done 440 done
329 441
330 echo "${flags}" 442 echo "${flags}"
331 443
332 # Just bail if we dont have any flags 444 # Just bail if we dont have any flags
333 [[ -n ${flags} ]] 445 [[ -n ${flags} ]]
334} 446}
335 447
336# Returns (echo's) the given flags supported by the C compiler 448# @FUNCTION: test-flags-CC
449# @USAGE: <flags>
450# @DESCRIPTION:
451# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
337test-flags-CC() { test-flags-PROG "CC" "$@"; } 452test-flags-CC() { test-flags-PROG "CC" "$@"; }
338 453
339# Returns (echo's) the given flags supported by the C++ compiler 454# @FUNCTION: test-flags-CXX
455# @USAGE: <flags>
456# @DESCRIPTION:
457# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
340test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 458test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
341 459
460# @FUNCTION: test-flags-F77
461# @USAGE: <flags>
462# @DESCRIPTION:
463# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
464test-flags-F77() { test-flags-PROG "F77" "$@"; }
465
466# @FUNCTION: test-flags-FC
467# @USAGE: <flags>
468# @DESCRIPTION:
469# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
470test-flags-FC() { test-flags-PROG "FC" "$@"; }
471
472# @FUNCTION: test-flags
473# @USAGE: <flags>
474# @DESCRIPTION:
342# Short-hand that should hopefully work for both C and C++ compiler, but 475# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination. 476# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; } 477test-flags() { test-flags-CC "$@"; }
345 478
346# Deprecated, use test-flags() 479# @FUNCTION: test_flag
480# @DESCRIPTION:
481# DEPRICIATED, use test-flags()
347test_flag() { 482test_flag() {
348 ewarn "test_flag: deprecated, please use test-flags()!" >&2 483 ewarn "test_flag: deprecated, please use test-flags()!" >&2
349 484
350 test-flags-CC "$@" 485 test-flags-CC "$@"
351} 486}
352 487
488# @FUNCTION: test_version_info
489# @USAGE: <version>
490# @DESCRIPTION:
491# Returns shell true if the current C compiler version matches <version>, else returns shell false.
492# Accepts shell globs.
353test_version_info() { 493test_version_info() {
354 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 494 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
355 return 0 495 return 0
356 else 496 else
357 return 1 497 return 1
358 fi 498 fi
359} 499}
360 500
501# @FUNCTION: strip-unsupported-flags
502# @DESCRIPTION:
503# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
361strip-unsupported-flags() { 504strip-unsupported-flags() {
362 local x NEW_CFLAGS NEW_CXXFLAGS 505 export CFLAGS=$(test-flags-CC ${CFLAGS})
363 506 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
364 for x in ${CFLAGS} ; do 507 export FFLAGS=$(test-flags-F77 ${FFLAGS})
365 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 508 export FCFLAGS=$(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} 509}
374 510
511# @FUNCTION: get-flag
512# @USAGE: <flag>
513# @DESCRIPTION:
514# Find and echo the value for a particular flag. Accepts shell globs.
375get-flag() { 515get-flag() {
376 local f findflag="$1" 516 local f findflag="$1"
377 517
378 # this code looks a little flaky but seems to work for 518 # this code looks a little flaky but seems to work for
379 # everything we want ... 519 # everything we want ...
380 # for example, if CFLAGS="-march=i686": 520 # for example, if CFLAGS="-march=i686":
381 # `get-flag -march` == "-march=i686" 521 # `get-flag -march` == "-march=i686"
382 # `get-flag march` == "i686" 522 # `get-flag march` == "i686"
383 for f in ${CFLAGS} ${CXXFLAGS} ; do 523 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
384 if [ "${f/${findflag}}" != "${f}" ] ; then 524 if [ "${f/${findflag}}" != "${f}" ] ; then
385 printf "%s\n" "${f/-${findflag}=}" 525 printf "%s\n" "${f/-${findflag}=}"
386 return 0 526 return 0
387 fi 527 fi
388 done 528 done
389 return 1 529 return 1
390} 530}
391 531
532# @FUNCTION: has_hardened
533# @DESCRIPTION:
392# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 534# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
393has_hardened() { 535has_hardened() {
394 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 536 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
395 537
396 test_version_info Hardened && return 0 538 test_version_info Hardened && return 0
397 # The specs file wont exist unless gcc has GCC_SPECS support 539 # The specs file wont exist unless gcc has GCC_SPECS support
398 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]] 540 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
399} 541}
400 542
543# @FUNCTION: has_pic
544# @DESCRIPTION:
401# DEPRECATED - use gcc-specs-pie from toolchain-funcs 545# DEPRECATED - use gcc-specs-pie from toolchain-funcs
402# indicate whether PIC is set 546# indicate whether PIC is set
403has_pic() { 547has_pic() {
404 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2 548 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
405 549
406 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \ 550 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
407 ${CFLAGS/-fpic} != ${CFLAGS} || \ 551 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
408 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]] 552 gcc-specs-pie
409} 553}
410 554
555# @FUNCTION: has_pie
556# @DESCRIPTION:
411# DEPRECATED - use gcc-specs-pie from toolchain-funcs 557# DEPRECATED - use gcc-specs-pie from toolchain-funcs
412# indicate whether PIE is set 558# indicate whether PIE is set
413has_pie() { 559has_pie() {
414 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2 560 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
415 561
416 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \ 562 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
417 ${CFLAGS/-fpie} != ${CFLAGS} || \ 563 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
418 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \ 564 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} 565}
422 566
567# @FUNCTION: has_ssp_all
568# @DESCRIPTION:
423# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 569# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
424# indicate whether code for SSP is being generated for all functions 570# indicate whether code for SSP is being generated for all functions
425has_ssp_all() { 571has_ssp_all() {
426 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2 572 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
427 573
428 # note; this matches only -fstack-protector-all 574 # note; this matches only -fstack-protector-all
429 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \ 575 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
430 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \ 576 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
431 gcc-specs-ssp 577 gcc-specs-ssp-to-all
432} 578}
433 579
580# @FUNCTION: has_ssp
581# @DESCRIPTION:
434# DEPRECATED - use gcc-specs-ssp from toolchain-funcs 582# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
435# indicate whether code for SSP is being generated 583# indicate whether code for SSP is being generated
436has_ssp() { 584has_ssp() {
437 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2 585 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
438 586
440 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \ 588 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
441 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \ 589 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
442 gcc-specs-ssp 590 gcc-specs-ssp
443} 591}
444 592
593# @FUNCTION: has_m64
594# @DESCRIPTION:
595# This doesn't test if the flag is accepted, it tests if the flag actually
596# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
597# return code is 0, else the return code is 1.
445has_m64() { 598has_m64() {
446 # this doesnt test if the flag is accepted, it tests if the flag 599 # this doesnt test if the flag is accepted, it tests if the flag
447 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 600 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
448 # please dont replace this function with test_flag in some future 601 # please dont replace this function with test_flag in some future
449 # clean-up! 602 # clean-up!
456 rm -f "${temp}".c 609 rm -f "${temp}".c
457 [[ ${ret} != 1 ]] && return 0 610 [[ ${ret} != 1 ]] && return 0
458 return 1 611 return 1
459} 612}
460 613
614# @FUNCTION: has_m32
615# @DESCRIPTION:
616# This doesn't test if the flag is accepted, it tests if the flag actually
617# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
618# code is 0, else return code is 1.
461has_m32() { 619has_m32() {
462 # this doesnt test if the flag is accepted, it tests if the flag 620 # this doesnt test if the flag is accepted, it tests if the flag
463 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 621 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
464 # please dont replace this function with test_flag in some future 622 # please dont replace this function with test_flag in some future
465 # clean-up! 623 # clean-up!
474 rm -f "${temp}".c 632 rm -f "${temp}".c
475 [[ ${ret} != 1 ]] && return 0 633 [[ ${ret} != 1 ]] && return 0
476 return 1 634 return 1
477} 635}
478 636
637# @FUNCTION: replace-sparc64-flags
638# @DESCRIPTION:
639# Sets mcpu to v8 and uses the original value as mtune if none specified.
479replace-sparc64-flags() { 640replace-sparc64-flags() {
480 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 641 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
481 642
482 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 643 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
483 for x in ${SPARC64_CPUS}; do 644 for x in ${SPARC64_CPUS}; do
484 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 645 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
485 done 646 done
486 else 647 else
487 for x in ${SPARC64_CPUS}; do 648 for x in ${SPARC64_CPUS}; do
488 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 649 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
489 done 650 done
490 fi 651 fi
491 652
492 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 653 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
493 for x in ${SPARC64_CPUS}; do 654 for x in ${SPARC64_CPUS}; do
494 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 655 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
495 done 656 done
496 else 657 else
497 for x in ${SPARC64_CPUS}; do 658 for x in ${SPARC64_CPUS}; do
498 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 659 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
499 done 660 done
500 fi 661 fi
501 662
502 export CFLAGS CXXFLAGS 663 export CFLAGS CXXFLAGS
503} 664}
504 665
666# @FUNCTION: append-ldflags
667# @USAGE: <flags>
668# @DESCRIPTION:
669# Add extra <flags> to the current LDFLAGS.
505append-ldflags() { 670append-ldflags() {
671 [[ -z $* ]] && return 0
672 local flag
673 for flag in "$@"; do
674 [[ ${flag} == -l* ]] && \
675 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
676 done
677
506 export LDFLAGS="${LDFLAGS} $*" 678 export LDFLAGS="${LDFLAGS} $*"
507 return 0 679 return 0
508} 680}
509 681
682# @FUNCTION: filter-ldflags
683# @USAGE: <flags>
684# @DESCRIPTION:
685# Remove particular <flags> from LDFLAGS. Accepts shell globs.
510filter-ldflags() { 686filter-ldflags() {
511 local x 687 _filter-var LDFLAGS "$@"
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:${#LDFLAGS}-2}
522 export LDFLAGS
523 return 0 688 return 0
524} 689}
525 690
691# @FUNCTION: raw-ldflags
692# @USAGE: <flags>
693# @DESCRIPTION:
526# Turn C style ldflags (-Wl,-foo) into straight ldflags 694# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
695# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
696# to gcc where it needs the '-Wl,'.
527raw-ldflags() { 697raw-ldflags() {
528 local x input="$@" 698 local x input="$@"
529 [[ -z ${input} ]] && input=${LDFLAGS} 699 [[ -z ${input} ]] && input=${LDFLAGS}
530 set -- 700 set --
531 for x in ${input} ; do 701 for x in ${input} ; do
533 set -- "$@" ${x//,/ } 703 set -- "$@" ${x//,/ }
534 done 704 done
535 echo "$@" 705 echo "$@"
536} 706}
537 707
538fstack-flags() { 708# @FUNCTION: bindnow-flags
539 if gcc-specs-ssp; then 709# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
540 [ -z "`is-flag -fno-stack-protector`" ] && 710# @DESCRIPTION:
541 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 711# DEPRECATED - Gets the flags needed for "NOW" binding
542 fi 712bindnow-flags() {
543 return 0 713 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild"
544} 714}
545 715
546# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 716
547# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 717# Some tests for when we screw with things and want to make
548# fixes. 718# sure we didn't break anything
719#TESTS() {
720# CFLAGS="-a -b -c=1"
721# CXXFLAGS="-x -y -z=2"
722# LDFLAGS="-l -m -n=3"
549# 723#
550# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 724# die() { exit 1; }
551gcc2-flags() { 725# (is-flag 1 2 3) && die
552 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 726# (is-ldflag 1 2 3) && die
553 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 727#
554 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 728# is-flagq -l && die
555 fi 729# is-ldflagq -a && die
556 730# is-flagq -a || die
557 replace-cpu-flags k6-{2,3} k6 731# is-flagq -x || die
558 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 732# is-ldflagq -n=* || die
559 733# is-ldflagq -n && die
560 replace-cpu-flags pentium-mmx i586 734#
561 replace-cpu-flags pentium{2,3,4} i686 735# strip-unsupported-flags
562 736# [[ ${CFLAGS} == "-c=1" ]] || die
563 replace-cpu-flags ev6{7,8} ev6 737# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
564 738#
565 export CFLAGS CXXFLAGS 739# echo "All tests pass"
566} 740#}
567 741#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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