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Revision 1.1.1.1 Revision 1.187
1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2013 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 1.1.1.1 2005/11/30 09:59:19 chriswhite Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.187 2013/01/12 14:32:31 jlec 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() 13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
7inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
8 17
9# 18# Return all the flag variables that our high level funcs operate on.
10#### filter-flags <flags> #### 19all-flag-vars() {
11# Remove particular flags from C[XX]FLAGS 20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
12# Matches only complete flags 21}
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 ################
66# The following are still present to avoid breaking existing
67# code more than necessary; however they are deprecated. Please
68# use gcc-specs-* from toolchain-funcs.eclass instead, if you
69# need to know which hardened techs are active in the compiler.
70# See bug #100974
71#
72#### has_hardened ####
73# Returns true if the compiler has 'Hardened' in its version string,
74# (note; switched-spec vanilla compilers satisfy this condition) or
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 ####
86# Returns true if the compiler by default or with current CFLAGS
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 22
94# C[XX]FLAGS that we allow in strip-flags 23# {C,CPP,CXX,CCAS,F,FC,LD}FLAGS that we allow in strip-flags
24# Note: shell globs and character lists are allowed
95setup-allowed-flags() { 25setup-allowed-flags() {
96 if [[ -z ${ALLOWED_FLAGS} ]] ; then
97 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
98 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -mcpu -march -mtune"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 28 ALLOWED_FLAGS+=" -fstack-protector -fstack-protector-all"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
103 fi 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive"
33 ALLOWED_FLAGS+=" -W* -w"
34
104 # allow a bunch of flags that negate features / control ABI 35 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 36 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
37 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
38 -fno-omit-frame-pointer"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 40 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
41 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi \
49 -D* -U*"
115 50
116 # C[XX]FLAGS that we are think is ok, but needs testing 51 # 4.5
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 52 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 53 # 4.6
119 return 0 54 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
120} 55 # 4.7
56 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
121 57
58 # CPPFLAGS and LDFLAGS
59 ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
60
61 export ALLOWED_FLAGS
62 return 0
63}
64
65# inverted filters for hardened compiler. This is trying to unpick
66# the hardened compiler defaults.
67_filter-hardened() {
68 local f
69 for f in "$@" ; do
70 case "${f}" in
71 # Ideally we should only concern ourselves with PIE flags,
72 # not -fPIC or -fpic, but too many places filter -fPIC without
73 # thinking about -fPIE.
74 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
75 gcc-specs-pie || continue
76 is-flagq -nopie || append-flags -nopie;;
77 -fstack-protector)
78 gcc-specs-ssp || continue
79 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
80 -fstack-protector-all)
81 gcc-specs-ssp-to-all || continue
82 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
83 -fno-strict-overflow)
84 gcc-specs-nostrict || continue
85 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
86 esac
87 done
88}
89
90# Remove occurrences of strings from variable given in $1
91# Strings removed are matched as globs, so for example
92# '-O*' would remove -O1, -O2 etc.
93_filter-var() {
94 local f x var=$1 new=()
95 shift
96
97 for f in ${!var} ; do
98 for x in "$@" ; do
99 # Note this should work with globs like -O*
100 [[ ${f} == ${x} ]] && continue 2
101 done
102 new+=( "${f}" )
103 done
104 eval export ${var}=\""${new[*]}"\"
105}
106
107# @FUNCTION: filter-flags
108# @USAGE: <flags>
109# @DESCRIPTION:
110# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
122filter-flags() { 111filter-flags() {
123 local x f fset 112 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 113 local v
114 for v in $(all-flag-vars) ; do
115 _filter-var ${v} "$@"
116 done
117 return 0
118}
125 119
120# @FUNCTION: filter-lfs-flags
121# @DESCRIPTION:
122# Remove flags that enable Large File Support.
123filter-lfs-flags() {
124 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
125 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
126 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
127 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
128 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
129 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
130}
131
132# @FUNCTION: filter-ldflags
133# @USAGE: <flags>
134# @DESCRIPTION:
135# Remove particular <flags> from LDFLAGS. Accepts shell globs.
136filter-ldflags() {
137 _filter-var LDFLAGS "$@"
138 return 0
139}
140
141# @FUNCTION: append-cppflags
142# @USAGE: <flags>
143# @DESCRIPTION:
144# Add extra <flags> to the current CPPFLAGS.
145append-cppflags() {
146 [[ $# -eq 0 ]] && return 0
147 export CPPFLAGS="${CPPFLAGS} $*"
148 return 0
149}
150
151# @FUNCTION: append-cflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CFLAGS.
155append-cflags() {
156 [[ $# -eq 0 ]] && return 0
157 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
158 return 0
159}
160
161# @FUNCTION: append-cxxflags
162# @USAGE: <flags>
163# @DESCRIPTION:
164# Add extra <flags> to the current CXXFLAGS.
165append-cxxflags() {
166 [[ $# -eq 0 ]] && return 0
167 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
168 return 0
169}
170
171# @FUNCTION: append-fflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current {F,FC}FLAGS.
175append-fflags() {
176 [[ $# -eq 0 ]] && return 0
177 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
178 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
179 return 0
180}
181
182# @FUNCTION: append-lfs-flags
183# @DESCRIPTION:
184# Add flags that enable Large File Support.
185append-lfs-flags() {
186 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
187 # see comments in filter-lfs-flags func for meaning of these
188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189}
190
191# @FUNCTION: append-ldflags
192# @USAGE: <flags>
193# @DESCRIPTION:
194# Add extra <flags> to the current LDFLAGS.
195append-ldflags() {
196 [[ $# -eq 0 ]] && return 0
197 local flag
126 for x in "$@" ; do 198 for flag in "$@"; do
199 [[ ${flag} == -l* ]] && \
200 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
201 done
202
203 export LDFLAGS="${LDFLAGS} $*"
204 return 0
205}
206
207# @FUNCTION: append-flags
208# @USAGE: <flags>
209# @DESCRIPTION:
210# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
211append-flags() {
212 [[ $# -eq 0 ]] && return 0
127 case "${x}" in 213 case " $* " in
128 -fPIC|-fpic|-fPIE|-fpie|-pie) 214 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
129 append-flags `test_flag -fno-pie`;; 215 *' '-L*|\
130 -fstack-protector|-fstack-protector-all) 216 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
131 fstack-flags;;
132 esac 217 esac
133 done 218 append-cflags "$@"
219 append-cxxflags "$@"
220 append-fflags "$@"
221 return 0
222}
134 223
135 for fset in CFLAGS CXXFLAGS; do 224# @FUNCTION: replace-flags
225# @USAGE: <old> <new>
226# @DESCRIPTION:
227# Replace the <old> flag with <new>. Accepts shell globs for <old>.
228replace-flags() {
229 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
230
231 local f var new
232 for var in $(all-flag-vars) ; do
136 # Looping over the flags instead of using a global 233 # Looping over the flags instead of using a global
137 # substitution ensures that we're working with flag atoms. 234 # substitution ensures that we're working with flag atoms.
138 # Otherwise globs like -O* have the potential to wipe out the 235 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags. 236 # list of flags.
237 new=()
140 for f in ${!fset}; do 238 for f in ${!var} ; do
141 for x in "$@"; 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
151}
152
153filter-lfs-flags() {
154 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
155 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
156}
157
158append-lfs-flags() {
159 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
160 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
161}
162
163append-flags() {
164 [[ -z $* ]] && return 0
165 export CFLAGS="${CFLAGS} $*"
166 export CXXFLAGS="${CXXFLAGS} $*"
167 [ -n "`is-flag -fno-stack-protector`" -o \
168 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags
169 return 0
170}
171
172replace-flags() {
173 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#"
176
177 local f fset
178 declare -a new_CFLAGS new_CXXFLAGS
179
180 for fset in CFLAGS CXXFLAGS; do
181 # Looping over the flags instead of using a global
182 # substitution ensures that we're working with flag atoms.
183 # Otherwise globs like -O* have the potential to wipe out the
184 # list of flags.
185 for f in ${!fset}; do
186 # Note this should work with globs like -O* 239 # Note this should work with globs like -O*
187 [[ ${f} == ${1} ]] && f=${2} 240 [[ ${f} == ${1} ]] && f=${2}
188 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 241 new+=( "${f}" )
189 done
190 eval export ${fset}=\${new_${fset}\[*]}
191 done 242 done
243 eval export ${var}=\""${new[*]}"\"
244 done
192 245
193 return 0 246 return 0
194} 247}
195 248
249# @FUNCTION: replace-cpu-flags
250# @USAGE: <old> <new>
251# @DESCRIPTION:
252# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
253# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 254replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 255 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 256 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 257 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 258 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 259 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 260 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 261 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 262 shift
205 done 263 done
206 return 0 264 return 0
207} 265}
208 266
267_is_flagq() {
268 local x var
269 eval var=\""\${$1[*]}"\"
270 for x in ${var} ; do
271 [[ ${x} == $2 ]] && return 0
272 done
273 return 1
274}
275
276# @FUNCTION: is-flagq
277# @USAGE: <flag>
278# @DESCRIPTION:
279# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
280is-flagq() {
281 [[ -n $2 ]] && die "Usage: is-flag <flag>"
282
283 local var
284 for var in $(all-flag-vars) ; do
285 _is_flagq ${var} "$1" && return 0
286 done
287 return 1
288}
289
290# @FUNCTION: is-flag
291# @USAGE: <flag>
292# @DESCRIPTION:
293# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 294is-flag() {
210 local x 295 is-flagq "$@" && 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} 296}
221 297
298# @FUNCTION: is-ldflagq
299# @USAGE: <flag>
300# @DESCRIPTION:
301# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
302is-ldflagq() {
303 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
304 _is_flagq LDFLAGS $1
305}
306
307# @FUNCTION: is-ldflag
308# @USAGE: <flag>
309# @DESCRIPTION:
310# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
311is-ldflag() {
312 is-ldflagq "$@" && echo true
313}
314
315# @FUNCTION: filter-mfpmath
316# @USAGE: <math types>
317# @DESCRIPTION:
318# Remove specified math types from the fpmath flag. For example, if the user
319# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
320# -mfpmath=386.
222filter-mfpmath() { 321filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 322 local orig_mfpmath new_math prune_math
224 323
225 # save the original -mfpmath flag 324 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 325 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 326 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 327 new_math=$(get-flag mfpmath)
328 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 329 # figure out which math values are to be removed
230 prune_math="" 330 prune_math=""
231 for prune_math in "$@" ; do 331 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 332 new_math=${new_math/ ${prune_math} / }
233 done 333 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 334 new_math=$(echo ${new_math})
335 new_math=${new_math// /,}
235 336
236 if [ -z "${new_math}" ] ; then 337 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 338 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 339 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 340 filter-flags ${orig_mfpmath}
240 else 341 else
241 # if we only want to filter some of the user specified 342 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 344 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 345 fi
245 return 0 346 return 0
246} 347}
247 348
349# @FUNCTION: strip-flags
350# @DESCRIPTION:
351# Strip *FLAGS of everything except known good/safe flags. This runs over all
352# flags returned by all_flag_vars().
248strip-flags() { 353strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 354 local x y var
250 355
251 setup-allowed-flags 356 setup-allowed-flags
252 357
253 local NEW_CFLAGS="" 358 set -f # disable pathname expansion
254 local NEW_CXXFLAGS=""
255 359
256 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 360 for var in $(all-flag-vars) ; do
257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 361 local new=()
258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 362
363 for x in ${!var} ; do
364 local flag=${x%%=*}
365 for y in ${ALLOWED_FLAGS} ; do
366 if [[ -z ${flag%%${y}} ]] ; then
367 new+=( "${x}" )
368 break
369 fi
370 done
371 done
372
373 # In case we filtered out all optimization flags fallback to -O2
374 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
375 new+=( -O2 )
376 fi
377
378 eval export ${var}=\""${new[*]}"\"
379 done
380
381 set +f # re-enable pathname expansion
382
383 return 0
384}
385
386test-flag-PROG() {
387 local comp=$1
388 local lang=$2
389 local flag=$3
390
391 [[ -z ${comp} || -z ${flag} ]] && return 1
392
393 # use -c so we can test the assembler as well
394 local PROG=$(tc-get${comp})
395 if ${PROG} -c -o /dev/null -x${lang} - < /dev/null > /dev/null 2>&1 ; then
396 ${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \
397 > /dev/null 2>&1
398 else
399 ${PROG} "${flag}" -c -o /dev/null /dev/null > /dev/null 2>&1
259 fi 400 fi
401}
260 402
261 set -f # disable pathname expansion 403# @FUNCTION: test-flag-CC
404# @USAGE: <flag>
405# @DESCRIPTION:
406# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
407test-flag-CC() { test-flag-PROG "CC" c "$1"; }
262 408
263 for x in ${CFLAGS}; do 409# @FUNCTION: test-flag-CXX
264 for y in ${ALLOWED_FLAGS}; do 410# @USAGE: <flag>
265 flag=${x%%=*} 411# @DESCRIPTION:
266 if [ "${flag%%${y}}" = "" ] ; then 412# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
267 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 413test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
268 break 414
269 fi 415# @FUNCTION: test-flag-F77
416# @USAGE: <flag>
417# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
419test-flag-F77() { test-flag-PROG "F77" f77 "$1"; }
420
421# @FUNCTION: test-flag-FC
422# @USAGE: <flag>
423# @DESCRIPTION:
424# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
425test-flag-FC() { test-flag-PROG "FC" f95 "$1"; }
426
427test-flags-PROG() {
428 local comp=$1
429 local flags=()
430 local x
431
432 shift
433
434 [[ -z ${comp} ]] && return 1
435
436 for x ; do
437 test-flag-${comp} "${x}" && flags+=( "${x}" )
270 done 438 done
271 done
272 439
273 for x in ${CXXFLAGS}; do 440 echo "${flags[*]}"
274 for y in ${ALLOWED_FLAGS}; do
275 flag=${x%%=*}
276 if [ "${flag%%${y}}" = "" ] ; then
277 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
278 break
279 fi
280 done
281 done
282 441
283 # In case we filtered out all optimization flags fallback to -O2 442 # Just bail if we dont have any flags
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 443 [[ ${#flags[@]} -gt 0 ]]
285 NEW_CFLAGS="${NEW_CFLAGS} -O2"
286 fi
287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
289 fi
290
291 set +f # re-enable pathname expansion
292
293 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}"
295 return 0
296} 444}
297 445
298test_flag() { 446# @FUNCTION: test-flags-CC
299 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 447# @USAGE: <flags>
300 printf "%s\n" "$*" 448# @DESCRIPTION:
301 return 0 449# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
302 fi 450test-flags-CC() { test-flags-PROG "CC" "$@"; }
303 return 1
304}
305 451
452# @FUNCTION: test-flags-CXX
453# @USAGE: <flags>
454# @DESCRIPTION:
455# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
456test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
457
458# @FUNCTION: test-flags-F77
459# @USAGE: <flags>
460# @DESCRIPTION:
461# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
462test-flags-F77() { test-flags-PROG "F77" "$@"; }
463
464# @FUNCTION: test-flags-FC
465# @USAGE: <flags>
466# @DESCRIPTION:
467# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
468test-flags-FC() { test-flags-PROG "FC" "$@"; }
469
470# @FUNCTION: test-flags
471# @USAGE: <flags>
472# @DESCRIPTION:
473# Short-hand that should hopefully work for both C and C++ compiler, but
474# its really only present due to the append-flags() abomination.
475test-flags() { test-flags-CC "$@"; }
476
477# @FUNCTION: test_version_info
478# @USAGE: <version>
479# @DESCRIPTION:
480# Returns shell true if the current C compiler version matches <version>, else returns shell false.
481# Accepts shell globs.
306test_version_info() { 482test_version_info() {
307 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 483 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
308 return 0 484 return 0
309 else 485 else
310 return 1 486 return 1
311 fi 487 fi
312} 488}
313 489
490# @FUNCTION: strip-unsupported-flags
491# @DESCRIPTION:
492# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
314strip-unsupported-flags() { 493strip-unsupported-flags() {
315 local x NEW_CFLAGS NEW_CXXFLAGS 494 export CFLAGS=$(test-flags-CC ${CFLAGS})
316 495 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
317 for x in ${CFLAGS} ; do 496 export FFLAGS=$(test-flags-F77 ${FFLAGS})
318 NEW_CFLAGS="${NEW_CFLAGS} $(test_flag ${x})" 497 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
319 done
320 for x in ${CXXFLAGS} ; do
321 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test_flag ${x})"
322 done
323
324 export CFLAGS=${NEW_CFLAGS}
325 export CXXFLAGS=${NEW_CXXFLAGS}
326} 498}
327 499
500# @FUNCTION: get-flag
501# @USAGE: <flag>
502# @DESCRIPTION:
503# Find and echo the value for a particular flag. Accepts shell globs.
328get-flag() { 504get-flag() {
329 local f findflag="$1" 505 local f var findflag="$1"
330 506
331 # this code looks a little flaky but seems to work for 507 # this code looks a little flaky but seems to work for
332 # everything we want ... 508 # everything we want ...
333 # for example, if CFLAGS="-march=i686": 509 # for example, if CFLAGS="-march=i686":
334 # `get-flag -march` == "-march=i686" 510 # `get-flag -march` == "-march=i686"
335 # `get-flag march` == "i686" 511 # `get-flag march` == "i686"
336 for f in ${CFLAGS} ${CXXFLAGS} ; do 512 for var in $(all-flag-vars) ; do
513 for f in ${!var} ; do
337 if [ "${f/${findflag}}" != "${f}" ] ; then 514 if [ "${f/${findflag}}" != "${f}" ] ; then
338 printf "%s\n" "${f/-${findflag}=}" 515 printf "%s\n" "${f/-${findflag}=}"
339 return 0 516 return 0
340 fi 517 fi
518 done
341 done 519 done
342 return 1 520 return 1
343} 521}
344 522
345# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 523# @FUNCTION: has_m64
346has_hardened() { 524# @DESCRIPTION:
347 test_version_info Hardened && return 0 525# This doesn't test if the flag is accepted, it tests if the flag actually
348 # the specs file wont exist unless gcc has GCC_SPECS support 526# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
349 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 527# return code is 0, else the return code is 1.
350 return 0
351 return 1
352}
353
354# DEPRECATED - use gcc-specs-pie from toolchain-funcs
355# indicate whether PIC is set
356has_pic() {
357 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0
358 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
359 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
360 return 1
361}
362
363# DEPRECATED - use gcc-specs-pie from toolchain-funcs
364# indicate whether PIE is set
365has_pie() {
366 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0
367 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
368 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
369 # test PIC while waiting for specs to be updated to generate __PIE__
370 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
371 return 1
372}
373
374# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
375# indicate whether code for SSP is being generated for all functions
376has_ssp_all() {
377 # note; this matches only -fstack-protector-all
378 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0
379 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0
380 gcc-specs-ssp && return 0
381 return 1
382}
383
384# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
385# indicate whether code for SSP is being generated
386has_ssp() {
387 # note; this matches both -fstack-protector and -fstack-protector-all
388 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0
389 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
390 gcc-specs-ssp && return 0
391 return 1
392}
393
394has_m64() { 528has_m64() {
529 eqawarn "${FUNCNAME}: don't use this anymore"
530
395 # this doesnt test if the flag is accepted, it tests if the flag 531 # this doesnt test if the flag is accepted, it tests if the flag
396 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 532 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
397 # please dont replace this function with test_flag in some future 533 # please dont replace this function with test_flag in some future
398 # clean-up! 534 # clean-up!
535
399 local temp="$(emktemp)" 536 local temp="$(emktemp)"
400 echo "int main() { return(0); }" > ${temp}.c
401 MY_CC=$(tc-getCC)
402 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1
403 local ret=$?
404 rm -f ${temp}.c
405 [ "$ret" != "1" ] && return 0
406 return 1
407}
408
409has_m32() {
410 # this doesnt test if the flag is accepted, it tests if the flag
411 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
412 # please dont replace this function with test_flag in some future
413 # clean-up!
414
415 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
416
417 local temp=$(emktemp)
418 echo "int main() { return(0); }" > "${temp}".c 537 echo "int main() { return(0); }" > "${temp}".c
419 MY_CC=$(tc-getCC) 538 MY_CC=$(tc-getCC)
420 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 539 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
421 local ret=$? 540 local ret=$?
422 rm -f "${temp}".c 541 rm -f "${temp}".c
423 [ "$ret" != "1" ] && return 0 542 [[ ${ret} != 1 ]] && return 0
424 return 1 543 return 1
425} 544}
426 545
546has_m32() {
547 die "${FUNCNAME}: don't use this anymore"
548}
549
550# @FUNCTION: replace-sparc64-flags
551# @DESCRIPTION:
552# Sets mcpu to v8 and uses the original value as mtune if none specified.
427replace-sparc64-flags() { 553replace-sparc64-flags() {
428 local SPARC64_CPUS="ultrasparc v9" 554 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
429 555
430 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 556 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
431 for x in ${SPARC64_CPUS}; do 557 for x in ${SPARC64_CPUS}; do
432 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 558 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
433 done 559 done
434 else 560 else
435 for x in ${SPARC64_CPUS}; do 561 for x in ${SPARC64_CPUS}; do
436 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 562 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
437 done 563 done
438 fi 564 fi
439 565
440 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 566 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
441 for x in ${SPARC64_CPUS}; do 567 for x in ${SPARC64_CPUS}; do
442 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 568 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
443 done 569 done
444 else 570 else
445 for x in ${SPARC64_CPUS}; do 571 for x in ${SPARC64_CPUS}; do
446 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 572 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
447 done 573 done
448 fi 574 fi
449 575
450 export CFLAGS CXXFLAGS 576 export CFLAGS CXXFLAGS
451} 577}
452 578
579# @FUNCTION: append-libs
580# @USAGE: <libs>
581# @DESCRIPTION:
582# Add extra <libs> to the current LIBS.
453append-ldflags() { 583append-libs() {
454 export LDFLAGS="${LDFLAGS} $*" 584 [[ $# -eq 0 ]] && return 0
455 return 0 585 local flag
456}
457
458filter-ldflags() {
459 local x
460
461 # we do this fancy spacing stuff so as to not filter
462 # out part of a flag ... we want flag atoms ! :D
463 LDFLAGS=" ${LDFLAGS} "
464 for x in "$@" ; do 586 for flag in "$@"; do
465 LDFLAGS=${LDFLAGS// ${x} / } 587 [[ ${flag} == -l* ]] && flag=${flag#-l}
588 export LIBS="${LIBS} -l${flag}"
466 done 589 done
467 [[ -z ${LDFLAGS// } ]] \
468 && LDFLAGS="" \
469 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
470 export LDFLAGS
471 return 0
472}
473 590
474fstack-flags() {
475 if gcc-specs-ssp; then
476 [ -z "`is-flag -fno-stack-protector`" ] &&
477 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
478 fi
479 return 0 591 return 0
480} 592}
481 593
482# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 594# @FUNCTION: raw-ldflags
483# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 595# @USAGE: [flags]
484# fixes. 596# @DESCRIPTION:
597# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
598# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
599# to gcc where it needs the '-Wl,'.
485# 600#
486# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 601# If no flags are specified, then default to ${LDFLAGS}.
487gcc2-flags() { 602raw-ldflags() {
488 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 603 local x input="$@"
489 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 604 [[ -z ${input} ]] && input=${LDFLAGS}
490 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 605 set --
491 fi 606 for x in ${input} ; do
492 607 case ${x} in
493 replace-cpu-flags k6-{2,3} k6 608 -Wl,*)
494 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 609 x=${x#-Wl,}
495 610 set -- "$@" ${x//,/ }
496 replace-cpu-flags pentium-mmx i586 611 ;;
497 replace-cpu-flags pentium{2,3,4} i686 612 *) # Assume it's a compiler driver flag, so throw it away #441808
498 613 ;;
499 replace-cpu-flags ev6{7,8} ev6 614 esac
500 615 done
501 export CFLAGS CXXFLAGS 616 echo "$@"
502} 617}
503 618
504# Gets the flags needed for "NOW" binding 619# @FUNCTION: no-as-needed
505bindnow-flags() { 620# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
621no-as-needed() {
506 case $($(tc-getLD) -v 2>&1 </dev/null) in 622 case $($(tc-getLD) -v 2>&1 </dev/null) in
507 *GNU* | *'with BFD'*) # GNU ld 623 *GNU*) # GNU ld
508 echo "-Wl,-z,now" ;; 624 echo "-Wl,--no-as-needed" ;;
509 *Apple*) # Darwin ld
510 echo "-bind_at_load" ;;
511 *)
512 # Some linkers just recognize -V instead of -v
513 case $($(tc-getLD) -V 2>&1 </dev/null) in
514 *Solaris*) # Solaris accept almost the same GNU options
515 echo "-Wl,-z,now" ;;
516 esac
517 ;;
518 esac 625 esac
519} 626}
627
628fi

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