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Revision 1.101 Revision 1.176
1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2012 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 1.101 2006/01/01 01:14:59 swegener Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.176 2012/06/18 06:45:28 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() 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 [[ ${flag} == -l* ]] && \
200 ewarn "Appending a library link instruction (${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
269 for x in ${!1} ; do
270 [[ ${x} == $2 ]] && return 0
271 done
272 return 1
273}
274
275# @FUNCTION: is-flagq
276# @USAGE: <flag>
277# @DESCRIPTION:
278# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
279is-flagq() {
280 [[ -n $2 ]] && die "Usage: is-flag <flag>"
281
282 local var
283 for var in $(all-flag-vars) ; do
284 _is_flagq ${var} "$1" && return 0
285 done
286 return 1
287}
288
289# @FUNCTION: is-flag
290# @USAGE: <flag>
291# @DESCRIPTION:
292# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 293is-flag() {
210 local x 294 is-flagq "$@" && 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} 295}
221 296
297# @FUNCTION: is-ldflagq
298# @USAGE: <flag>
299# @DESCRIPTION:
300# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
301is-ldflagq() {
302 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
303 _is_flagq LDFLAGS $1
304}
305
306# @FUNCTION: is-ldflag
307# @USAGE: <flag>
308# @DESCRIPTION:
309# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
310is-ldflag() {
311 is-ldflagq "$@" && echo true
312}
313
314# @FUNCTION: filter-mfpmath
315# @USAGE: <math types>
316# @DESCRIPTION:
317# Remove specified math types from the fpmath flag. For example, if the user
318# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
319# -mfpmath=386.
222filter-mfpmath() { 320filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 321 local orig_mfpmath new_math prune_math
224 322
225 # save the original -mfpmath flag 323 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 324 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 325 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 326 new_math=$(get-flag mfpmath)
327 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 328 # figure out which math values are to be removed
230 prune_math="" 329 prune_math=""
231 for prune_math in "$@" ; do 330 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 331 new_math=${new_math/ ${prune_math} / }
233 done 332 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 333 new_math=$(echo ${new_math})
334 new_math=${new_math// /,}
235 335
236 if [ -z "${new_math}" ] ; then 336 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 337 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 338 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 339 filter-flags ${orig_mfpmath}
240 else 340 else
241 # if we only want to filter some of the user specified 341 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 343 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 344 fi
245 return 0 345 return 0
246} 346}
247 347
348# @FUNCTION: strip-flags
349# @DESCRIPTION:
350# Strip *FLAGS of everything except known good/safe flags. This runs over all
351# flags returned by all_flag_vars().
248strip-flags() { 352strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 353 local x y var
250 354
251 setup-allowed-flags 355 setup-allowed-flags
252 356
253 local NEW_CFLAGS=""
254 local NEW_CXXFLAGS=""
255
256 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
259 fi
260
261 set -f # disable pathname expansion 357 set -f # disable pathname expansion
262 358
263 for x in ${CFLAGS}; do 359 for var in $(all-flag-vars) ; do
360 local new=()
361
362 for x in ${!var} ; do
363 local flag=${x%%=*}
264 for y in ${ALLOWED_FLAGS}; do 364 for y in ${ALLOWED_FLAGS} ; do
265 flag=${x%%=*}
266 if [ "${flag%%${y}}" = "" ] ; then 365 if [[ -z ${flag%%${y}} ]] ; then
267 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 366 new+=( "${x}" )
268 break 367 break
269 fi 368 fi
270 done 369 done
271 done 370 done
272 371
273 for x in ${CXXFLAGS}; do
274 for y in ${ALLOWED_FLAGS}; do
275 flag=${x%%=*}
276 if [ "${flag%%${y}}" = "" ] ; then
277 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
278 break
279 fi
280 done
281 done
282
283 # In case we filtered out all optimization flags fallback to -O2 372 # In case we filtered out all optimization flags fallback to -O2
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 373 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
285 NEW_CFLAGS="${NEW_CFLAGS} -O2" 374 new+=( -O2 )
286 fi 375 fi
287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 376
288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 377 eval export ${var}=\""${new[*]}"\"
289 fi 378 done
290 379
291 set +f # re-enable pathname expansion 380 set +f # re-enable pathname expansion
292 381
293 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}"
295 return 0 382 return 0
296} 383}
297 384
298test-flag-PROG() { 385test-flag-PROG() {
299 local comp=$1 386 local comp=$1
300 local flags="$2" 387 local flag=$2
301 388
302 [[ -z ${comp} || -z ${flags} ]] && \ 389 [[ -z ${comp} || -z ${flag} ]] && return 1
303 return 1
304 390
391 # use -c so we can test the assembler as well
305 local PROG=$(tc-get${comp}) 392 local PROG=$(tc-get${comp})
306 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 393 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
307 > /dev/null 2>&1 394 > /dev/null 2>&1
308} 395}
309 396
310# Returns true if C compiler support given flag 397# @FUNCTION: test-flag-CC
398# @USAGE: <flag>
399# @DESCRIPTION:
400# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
311test-flag-CC() { test-flag-PROG "CC" "$1"; } 401test-flag-CC() { test-flag-PROG "CC" "$1"; }
312 402
313# Returns true if C++ compiler support given flag 403# @FUNCTION: test-flag-CXX
404# @USAGE: <flag>
405# @DESCRIPTION:
406# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 407test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
408
409# @FUNCTION: test-flag-F77
410# @USAGE: <flag>
411# @DESCRIPTION:
412# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
413test-flag-F77() { test-flag-PROG "F77" "$1"; }
414
415# @FUNCTION: test-flag-FC
416# @USAGE: <flag>
417# @DESCRIPTION:
418# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
419test-flag-FC() { test-flag-PROG "FC" "$1"; }
315 420
316test-flags-PROG() { 421test-flags-PROG() {
317 local comp=$1 422 local comp=$1
318 local flags 423 local flags
319 local x 424 local x
320 425
321 shift 426 shift
322 427
323 [[ -z ${comp} ]] && \ 428 [[ -z ${comp} ]] && return 1
324 return 1
325 429
326 for x in "$@" ; do 430 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}" 431 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
328 done 432 done
329 433
330 echo "${flags}" 434 echo "${flags}"
331 435
332 # Just bail if we dont have any flags 436 # Just bail if we dont have any flags
333 [[ -n ${flags} ]] 437 [[ -n ${flags} ]]
334} 438}
335 439
336# Returns (echo's) the given flags supported by the C compiler 440# @FUNCTION: test-flags-CC
441# @USAGE: <flags>
442# @DESCRIPTION:
443# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
337test-flags-CC() { test-flags-PROG "CC" "$@"; } 444test-flags-CC() { test-flags-PROG "CC" "$@"; }
338 445
339# Returns (echo's) the given flags supported by the C++ compiler 446# @FUNCTION: test-flags-CXX
447# @USAGE: <flags>
448# @DESCRIPTION:
449# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
340test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 450test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
341 451
452# @FUNCTION: test-flags-F77
453# @USAGE: <flags>
454# @DESCRIPTION:
455# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
456test-flags-F77() { test-flags-PROG "F77" "$@"; }
457
458# @FUNCTION: test-flags-FC
459# @USAGE: <flags>
460# @DESCRIPTION:
461# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
462test-flags-FC() { test-flags-PROG "FC" "$@"; }
463
464# @FUNCTION: test-flags
465# @USAGE: <flags>
466# @DESCRIPTION:
342# Short-hand that should hopefully work for both C and C++ compiler, but 467# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination. 468# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; } 469test-flags() { test-flags-CC "$@"; }
345 470
346# Depriciated, use test-flags() 471# @FUNCTION: test_version_info
347test_flag() { 472# @USAGE: <version>
348 addwrite "/dev/stderr" 473# @DESCRIPTION:
349 ewarn "test_flag: deprecated, please use test-flags()!" >/dev/stderr 474# Returns shell true if the current C compiler version matches <version>, else returns shell false.
350 475# Accepts shell globs.
351 test-flags-CC "$@"
352}
353
354test_version_info() { 476test_version_info() {
355 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 477 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
356 return 0 478 return 0
357 else 479 else
358 return 1 480 return 1
359 fi 481 fi
360} 482}
361 483
484# @FUNCTION: strip-unsupported-flags
485# @DESCRIPTION:
486# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
362strip-unsupported-flags() { 487strip-unsupported-flags() {
363 local x NEW_CFLAGS NEW_CXXFLAGS 488 export CFLAGS=$(test-flags-CC ${CFLAGS})
364 489 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
365 for x in ${CFLAGS} ; do 490 export FFLAGS=$(test-flags-F77 ${FFLAGS})
366 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 491 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
367 done
368 for x in ${CXXFLAGS} ; do
369 NEW_CXXFLAGS="${NEW_CXXFLAGS} $(test-flags ${x})"
370 done
371
372 export CFLAGS=${NEW_CFLAGS}
373 export CXXFLAGS=${NEW_CXXFLAGS}
374} 492}
375 493
494# @FUNCTION: get-flag
495# @USAGE: <flag>
496# @DESCRIPTION:
497# Find and echo the value for a particular flag. Accepts shell globs.
376get-flag() { 498get-flag() {
377 local f findflag="$1" 499 local f var findflag="$1"
378 500
379 # this code looks a little flaky but seems to work for 501 # this code looks a little flaky but seems to work for
380 # everything we want ... 502 # everything we want ...
381 # for example, if CFLAGS="-march=i686": 503 # for example, if CFLAGS="-march=i686":
382 # `get-flag -march` == "-march=i686" 504 # `get-flag -march` == "-march=i686"
383 # `get-flag march` == "i686" 505 # `get-flag march` == "i686"
384 for f in ${CFLAGS} ${CXXFLAGS} ; do 506 for var in $(all-flag-vars) ; do
507 for f in ${!var} ; do
385 if [ "${f/${findflag}}" != "${f}" ] ; then 508 if [ "${f/${findflag}}" != "${f}" ] ; then
386 printf "%s\n" "${f/-${findflag}=}" 509 printf "%s\n" "${f/-${findflag}=}"
387 return 0 510 return 0
388 fi 511 fi
512 done
389 done 513 done
390 return 1 514 return 1
391} 515}
392 516
393# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 517# @FUNCTION: has_m64
394has_hardened() { 518# @DESCRIPTION:
395 addwrite "/dev/stderr" 519# This doesn't test if the flag is accepted, it tests if the flag actually
396 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" \ 520# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
397 >/dev/stderr 521# return code is 0, else the return code is 1.
398
399 test_version_info Hardened && return 0
400 # The specs file wont exist unless gcc has GCC_SPECS support
401 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
402}
403
404# DEPRECATED - use gcc-specs-pie from toolchain-funcs
405# indicate whether PIC is set
406has_pic() {
407 addwrite "/dev/stderr"
408 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >/dev/stderr
409
410 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
411 ${CFLAGS/-fpic} != ${CFLAGS} || \
412 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
413}
414
415# DEPRECATED - use gcc-specs-pie from toolchain-funcs
416# indicate whether PIE is set
417has_pie() {
418 addwrite "/dev/stderr"
419 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >/dev/stderr
420
421 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
422 ${CFLAGS/-fpie} != ${CFLAGS} || \
423 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \
424 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
425 # test PIC while waiting for specs to be updated to generate __PIE__
426}
427
428# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
429# indicate whether code for SSP is being generated for all functions
430has_ssp_all() {
431 addwrite "/dev/stderr"
432 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >/dev/stderr
433
434 # note; this matches only -fstack-protector-all
435 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
436 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
437 gcc-specs-ssp
438}
439
440# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
441# indicate whether code for SSP is being generated
442has_ssp() {
443 addwrite "/dev/stderr"
444 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >/dev/stderr
445
446 # note; this matches both -fstack-protector and -fstack-protector-all
447 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
448 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
449 gcc-specs-ssp
450}
451
452has_m64() { 522has_m64() {
523 eqawarn "${FUNCNAME}: don't use this anymore"
524
453 # this doesnt test if the flag is accepted, it tests if the flag 525 # this doesnt test if the flag is accepted, it tests if the flag
454 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 526 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
455 # please dont replace this function with test_flag in some future 527 # please dont replace this function with test_flag in some future
456 # clean-up! 528 # clean-up!
457 529
464 [[ ${ret} != 1 ]] && return 0 536 [[ ${ret} != 1 ]] && return 0
465 return 1 537 return 1
466} 538}
467 539
468has_m32() { 540has_m32() {
469 # this doesnt test if the flag is accepted, it tests if the flag 541 die "${FUNCNAME}: don't use this anymore"
470 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
471 # please dont replace this function with test_flag in some future
472 # clean-up!
473
474 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
475
476 local temp=$(emktemp)
477 echo "int main() { return(0); }" > "${temp}".c
478 MY_CC=$(tc-getCC)
479 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
480 local ret=$?
481 rm -f "${temp}".c
482 [[ ${ret} != 1 ]] && return 0
483 return 1
484} 542}
485 543
544# @FUNCTION: replace-sparc64-flags
545# @DESCRIPTION:
546# Sets mcpu to v8 and uses the original value as mtune if none specified.
486replace-sparc64-flags() { 547replace-sparc64-flags() {
487 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 548 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
488 549
489 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 550 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
490 for x in ${SPARC64_CPUS}; do 551 for x in ${SPARC64_CPUS}; do
491 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 552 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
492 done 553 done
493 else 554 else
494 for x in ${SPARC64_CPUS}; do 555 for x in ${SPARC64_CPUS}; do
495 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 556 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
496 done 557 done
497 fi 558 fi
498 559
499 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 560 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
500 for x in ${SPARC64_CPUS}; do 561 for x in ${SPARC64_CPUS}; do
501 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 562 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
502 done 563 done
503 else 564 else
504 for x in ${SPARC64_CPUS}; do 565 for x in ${SPARC64_CPUS}; do
505 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 566 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
506 done 567 done
507 fi 568 fi
508 569
509 export CFLAGS CXXFLAGS 570 export CFLAGS CXXFLAGS
510} 571}
511 572
573# @FUNCTION: append-libs
574# @USAGE: <libs>
575# @DESCRIPTION:
576# Add extra <libs> to the current LIBS.
512append-ldflags() { 577append-libs() {
513 export LDFLAGS="${LDFLAGS} $*" 578 [[ $# -eq 0 ]] && return 0
514 return 0 579 local flag
515}
516
517filter-ldflags() {
518 local x
519
520 # we do this fancy spacing stuff so as to not filter
521 # out part of a flag ... we want flag atoms ! :D
522 LDFLAGS=" ${LDFLAGS} "
523 for x in "$@" ; do 580 for flag in "$@"; do
524 LDFLAGS=${LDFLAGS// ${x} / } 581 [[ ${flag} == -l* ]] && flag=${flag#-l}
582 export LIBS="${LIBS} -l${flag}"
525 done 583 done
526 [[ -z ${LDFLAGS// } ]] \
527 && LDFLAGS="" \
528 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
529 export LDFLAGS
530 return 0
531}
532 584
533fstack-flags() {
534 if gcc-specs-ssp; then
535 [ -z "`is-flag -fno-stack-protector`" ] &&
536 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
537 fi
538 return 0 585 return 0
539} 586}
540 587
541# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 588# @FUNCTION: raw-ldflags
542# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 589# @USAGE: [flags]
543# fixes. 590# @DESCRIPTION:
591# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
592# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
593# to gcc where it needs the '-Wl,'.
544# 594#
545# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 595# If no flags are specified, then default to ${LDFLAGS}.
546gcc2-flags() { 596raw-ldflags() {
547 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 597 local x input="$@"
548 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 598 [[ -z ${input} ]] && input=${LDFLAGS}
549 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 599 set --
550 fi 600 for x in ${input} ; do
551 601 x=${x#-Wl,}
552 replace-cpu-flags k6-{2,3} k6 602 set -- "$@" ${x//,/ }
553 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 603 done
554 604 echo "$@"
555 replace-cpu-flags pentium-mmx i586
556 replace-cpu-flags pentium{2,3,4} i686
557
558 replace-cpu-flags ev6{7,8} ev6
559
560 export CFLAGS CXXFLAGS
561} 605}
562 606
563# Gets the flags needed for "NOW" binding 607# @FUNCTION: no-as-needed
564bindnow-flags() { 608# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
609no-as-needed() {
565 case $($(tc-getLD) -v 2>&1 </dev/null) in 610 case $($(tc-getLD) -v 2>&1 </dev/null) in
566 *GNU* | *'with BFD'*) # GNU ld 611 *GNU*) # GNU ld
567 echo "-Wl,-z,now" ;; 612 echo "-Wl,--no-as-needed" ;;
568 *Apple*) # Darwin ld
569 echo "-bind_at_load" ;;
570 *)
571 # Some linkers just recognize -V instead of -v
572 case $($(tc-getLD) -V 2>&1 </dev/null) in
573 *Solaris*) # Solaris accept almost the same GNU options
574 echo "-Wl,-z,now" ;;
575 esac
576 ;;
577 esac 613 esac
578} 614}
615
616fi

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