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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 1.104 2006/01/14 10:52:12 kevquinn Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.175 2012/06/05 02:16:40 dirtyepic Exp $
4 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
7# toolchain@gentoo.org
8# @BLURB: common functions to manipulate and query toolchain flags
9# @DESCRIPTION:
10# This eclass contains a suite of functions to help developers sanely
11# and safely manage toolchain flags in their builds.
5 12
6# need access to emktemp() 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,CXX,F,FC}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 export ALLOWED_FLAGS
59 return 0
60}
61
62# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults.
64_filter-hardened() {
65 local f
66 for f in "$@" ; do
67 case "${f}" in
68 # Ideally we should only concern ourselves with PIE flags,
69 # not -fPIC or -fpic, but too many places filter -fPIC without
70 # thinking about -fPIE.
71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
72 gcc-specs-pie || continue
73 is-flagq -nopie || append-flags -nopie;;
74 -fstack-protector)
75 gcc-specs-ssp || continue
76 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
77 -fstack-protector-all)
78 gcc-specs-ssp-to-all || continue
79 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
80 -fno-strict-overflow)
81 gcc-specs-nostrict || continue
82 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
83 esac
84 done
85}
86
87# Remove occurrences of strings from variable given in $1
88# Strings removed are matched as globs, so for example
89# '-O*' would remove -O1, -O2 etc.
90_filter-var() {
91 local f x var=$1 new=()
92 shift
93
94 for f in ${!var} ; do
95 for x in "$@" ; do
96 # Note this should work with globs like -O*
97 [[ ${f} == ${x} ]] && continue 2
98 done
99 new+=( "${f}" )
100 done
101 eval export ${var}=\""${new[*]}"\"
102}
103
104# @FUNCTION: filter-flags
105# @USAGE: <flags>
106# @DESCRIPTION:
107# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
122filter-flags() { 108filter-flags() {
123 local x f fset 109 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 110 local v
111 for v in $(all-flag-vars) ; do
112 _filter-var ${v} "$@"
113 done
114 return 0
115}
125 116
117# @FUNCTION: filter-lfs-flags
118# @DESCRIPTION:
119# Remove flags that enable Large File Support.
120filter-lfs-flags() {
121 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
122 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
123 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
124 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
125 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
126 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
127}
128
129# @FUNCTION: filter-ldflags
130# @USAGE: <flags>
131# @DESCRIPTION:
132# Remove particular <flags> from LDFLAGS. Accepts shell globs.
133filter-ldflags() {
134 _filter-var LDFLAGS "$@"
135 return 0
136}
137
138# @FUNCTION: append-cppflags
139# @USAGE: <flags>
140# @DESCRIPTION:
141# Add extra <flags> to the current CPPFLAGS.
142append-cppflags() {
143 [[ $# -eq 0 ]] && return 0
144 export CPPFLAGS="${CPPFLAGS} $*"
145 return 0
146}
147
148# @FUNCTION: append-cflags
149# @USAGE: <flags>
150# @DESCRIPTION:
151# Add extra <flags> to the current CFLAGS.
152append-cflags() {
153 [[ $# -eq 0 ]] && return 0
154 export CFLAGS=$(test-flags-CC ${CFLAGS} "$@")
155 return 0
156}
157
158# @FUNCTION: append-cxxflags
159# @USAGE: <flags>
160# @DESCRIPTION:
161# Add extra <flags> to the current CXXFLAGS.
162append-cxxflags() {
163 [[ $# -eq 0 ]] && return 0
164 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS} "$@")
165 return 0
166}
167
168# @FUNCTION: append-fflags
169# @USAGE: <flags>
170# @DESCRIPTION:
171# Add extra <flags> to the current {F,FC}FLAGS.
172append-fflags() {
173 [[ $# -eq 0 ]] && return 0
174 export FFLAGS=$(test-flags-F77 ${FFLAGS} "$@")
175 export FCFLAGS=$(test-flags-FC ${FCFLAGS} "$@")
176 return 0
177}
178
179# @FUNCTION: append-lfs-flags
180# @DESCRIPTION:
181# Add flags that enable Large File Support.
182append-lfs-flags() {
183 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
184 # see comments in filter-lfs-flags func for meaning of these
185 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
186}
187
188# @FUNCTION: append-ldflags
189# @USAGE: <flags>
190# @DESCRIPTION:
191# Add extra <flags> to the current LDFLAGS.
192append-ldflags() {
193 [[ $# -eq 0 ]] && return 0
194 local flag
126 for x in "$@" ; do 195 for flag in "$@"; do
196 [[ ${flag} == -l* ]] && \
197 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
198 done
199
200 export LDFLAGS="${LDFLAGS} $*"
201 return 0
202}
203
204# @FUNCTION: append-flags
205# @USAGE: <flags>
206# @DESCRIPTION:
207# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
208append-flags() {
209 [[ $# -eq 0 ]] && return 0
127 case "${x}" in 210 case " $* " in
128 -fPIC|-fpic|-fPIE|-fpie|-pie) 211 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
129 append-flags `test_flag -fno-pie`;; 212 *' '-L*|\
130 -fstack-protector|-fstack-protector-all) 213 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
131 fstack-flags;;
132 esac 214 esac
133 done 215 append-cflags "$@"
216 append-cxxflags "$@"
217 append-fflags "$@"
218 return 0
219}
134 220
135 for fset in CFLAGS CXXFLAGS; do 221# @FUNCTION: replace-flags
222# @USAGE: <old> <new>
223# @DESCRIPTION:
224# Replace the <old> flag with <new>. Accepts shell globs for <old>.
225replace-flags() {
226 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
227
228 local f var new
229 for var in $(all-flag-vars) ; do
136 # Looping over the flags instead of using a global 230 # Looping over the flags instead of using a global
137 # substitution ensures that we're working with flag atoms. 231 # substitution ensures that we're working with flag atoms.
138 # Otherwise globs like -O* have the potential to wipe out the 232 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags. 233 # list of flags.
234 new=()
140 for f in ${!fset}; do 235 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* 236 # Note this should work with globs like -O*
187 [[ ${f} == ${1} ]] && f=${2} 237 [[ ${f} == ${1} ]] && f=${2}
188 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 238 new+=( "${f}" )
189 done
190 eval export ${fset}=\${new_${fset}\[*]}
191 done 239 done
240 eval export ${var}=\""${new[*]}"\"
241 done
192 242
193 return 0 243 return 0
194} 244}
195 245
246# @FUNCTION: replace-cpu-flags
247# @USAGE: <old> <new>
248# @DESCRIPTION:
249# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
250# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 251replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 252 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 253 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 254 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 255 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 256 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 257 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 258 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 259 shift
205 done 260 done
206 return 0 261 return 0
207} 262}
208 263
264_is_flagq() {
265 local x
266 for x in ${!1} ; do
267 [[ ${x} == $2 ]] && return 0
268 done
269 return 1
270}
271
272# @FUNCTION: is-flagq
273# @USAGE: <flag>
274# @DESCRIPTION:
275# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
276is-flagq() {
277 [[ -n $2 ]] && die "Usage: is-flag <flag>"
278
279 local var
280 for var in $(all-flag-vars) ; do
281 _is_flagq ${var} "$1" && return 0
282 done
283 return 1
284}
285
286# @FUNCTION: is-flag
287# @USAGE: <flag>
288# @DESCRIPTION:
289# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 290is-flag() {
210 local x 291 is-flagq "$@" && 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} 292}
221 293
294# @FUNCTION: is-ldflagq
295# @USAGE: <flag>
296# @DESCRIPTION:
297# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
298is-ldflagq() {
299 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
300 _is_flagq LDFLAGS $1
301}
302
303# @FUNCTION: is-ldflag
304# @USAGE: <flag>
305# @DESCRIPTION:
306# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
307is-ldflag() {
308 is-ldflagq "$@" && echo true
309}
310
311# @FUNCTION: filter-mfpmath
312# @USAGE: <math types>
313# @DESCRIPTION:
314# Remove specified math types from the fpmath flag. For example, if the user
315# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
316# -mfpmath=386.
222filter-mfpmath() { 317filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 318 local orig_mfpmath new_math prune_math
224 319
225 # save the original -mfpmath flag 320 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 321 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 322 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 323 new_math=$(get-flag mfpmath)
324 new_math=" ${new_math//,/ } "
229 # figure out which math values are to be removed 325 # figure out which math values are to be removed
230 prune_math="" 326 prune_math=""
231 for prune_math in "$@" ; do 327 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 328 new_math=${new_math/ ${prune_math} / }
233 done 329 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 330 new_math=$(echo ${new_math})
331 new_math=${new_math// /,}
235 332
236 if [ -z "${new_math}" ] ; then 333 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 334 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 335 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 336 filter-flags ${orig_mfpmath}
240 else 337 else
241 # if we only want to filter some of the user specified 338 # if we only want to filter some of the user specified
… …
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 340 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 341 fi
245 return 0 342 return 0
246} 343}
247 344
345# @FUNCTION: strip-flags
346# @DESCRIPTION:
347# Strip C[XX]FLAGS of everything except known good/safe flags.
248strip-flags() { 348strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 349 local x y var
250 350
251 setup-allowed-flags 351 setup-allowed-flags
252 352
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 353 set -f # disable pathname expansion
262 354
263 for x in ${CFLAGS}; do 355 for var in $(all-flag-vars) ; do
356 local new=()
357
358 for x in ${!var} ; do
359 local flag=${x%%=*}
264 for y in ${ALLOWED_FLAGS}; do 360 for y in ${ALLOWED_FLAGS} ; do
265 flag=${x%%=*}
266 if [ "${flag%%${y}}" = "" ] ; then 361 if [[ -z ${flag%%${y}} ]] ; then
267 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 362 new+=( "${x}" )
268 break 363 break
269 fi 364 fi
270 done 365 done
271 done 366 done
272 367
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} ${x}"
278 break
279 fi
280 done
281 done
282
283 # In case we filtered out all optimization flags fallback to -O2 368 # In case we filtered out all optimization flags fallback to -O2
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 369 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
285 NEW_CFLAGS="${NEW_CFLAGS} -O2" 370 new+=( -O2 )
286 fi 371 fi
287 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 372
288 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 373 eval export ${var}=\""${new[*]}"\"
289 fi 374 done
290 375
291 set +f # re-enable pathname expansion 376 set +f # re-enable pathname expansion
292 377
293 export CFLAGS="${NEW_CFLAGS}"
294 export CXXFLAGS="${NEW_CXXFLAGS}"
295 return 0 378 return 0
296} 379}
297 380
298test-flag-PROG() { 381test-flag-PROG() {
299 local comp=$1 382 local comp=$1
300 local flags="$2" 383 local flag=$2
301 384
302 [[ -z ${comp} || -z ${flags} ]] && \ 385 [[ -z ${comp} || -z ${flag} ]] && return 1
303 return 1
304 386
387 # use -c so we can test the assembler as well
305 local PROG=$(tc-get${comp}) 388 local PROG=$(tc-get${comp})
306 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 389 ${PROG} "${flag}" -c -o /dev/null -xc /dev/null \
307 > /dev/null 2>&1 390 > /dev/null 2>&1
308} 391}
309 392
310# Returns true if C compiler support given flag 393# @FUNCTION: test-flag-CC
394# @USAGE: <flag>
395# @DESCRIPTION:
396# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
311test-flag-CC() { test-flag-PROG "CC" "$1"; } 397test-flag-CC() { test-flag-PROG "CC" "$1"; }
312 398
313# Returns true if C++ compiler support given flag 399# @FUNCTION: test-flag-CXX
400# @USAGE: <flag>
401# @DESCRIPTION:
402# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
314test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 403test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
404
405# @FUNCTION: test-flag-F77
406# @USAGE: <flag>
407# @DESCRIPTION:
408# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
409test-flag-F77() { test-flag-PROG "F77" "$1"; }
410
411# @FUNCTION: test-flag-FC
412# @USAGE: <flag>
413# @DESCRIPTION:
414# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
415test-flag-FC() { test-flag-PROG "FC" "$1"; }
315 416
316test-flags-PROG() { 417test-flags-PROG() {
317 local comp=$1 418 local comp=$1
318 local flags 419 local flags
319 local x 420 local x
320 421
321 shift 422 shift
322 423
323 [[ -z ${comp} ]] && \ 424 [[ -z ${comp} ]] && return 1
324 return 1
325 425
326 for x in "$@" ; do 426 for x in "$@" ; do
327 test-flag-${comp} "${x}" && flags="${flags} ${x}" 427 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
328 done 428 done
329 429
330 echo "${flags}" 430 echo "${flags}"
331 431
332 # Just bail if we dont have any flags 432 # Just bail if we dont have any flags
333 [[ -n ${flags} ]] 433 [[ -n ${flags} ]]
334} 434}
335 435
336# Returns (echo's) the given flags supported by the C compiler 436# @FUNCTION: test-flags-CC
437# @USAGE: <flags>
438# @DESCRIPTION:
439# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
337test-flags-CC() { test-flags-PROG "CC" "$@"; } 440test-flags-CC() { test-flags-PROG "CC" "$@"; }
338 441
339# Returns (echo's) the given flags supported by the C++ compiler 442# @FUNCTION: test-flags-CXX
443# @USAGE: <flags>
444# @DESCRIPTION:
445# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
340test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 446test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
341 447
448# @FUNCTION: test-flags-F77
449# @USAGE: <flags>
450# @DESCRIPTION:
451# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
452test-flags-F77() { test-flags-PROG "F77" "$@"; }
453
454# @FUNCTION: test-flags-FC
455# @USAGE: <flags>
456# @DESCRIPTION:
457# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
458test-flags-FC() { test-flags-PROG "FC" "$@"; }
459
460# @FUNCTION: test-flags
461# @USAGE: <flags>
462# @DESCRIPTION:
342# Short-hand that should hopefully work for both C and C++ compiler, but 463# Short-hand that should hopefully work for both C and C++ compiler, but
343# its really only present due to the append-flags() abomination. 464# its really only present due to the append-flags() abomination.
344test-flags() { test-flags-CC "$@"; } 465test-flags() { test-flags-CC "$@"; }
345 466
346# Deprecated, use test-flags() 467# @FUNCTION: test_version_info
347test_flag() { 468# @USAGE: <version>
348 ewarn "test_flag: deprecated, please use test-flags()!" >&2 469# @DESCRIPTION:
349 470# Returns shell true if the current C compiler version matches <version>, else returns shell false.
350 test-flags-CC "$@" 471# Accepts shell globs.
351}
352
353test_version_info() { 472test_version_info() {
354 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 473 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
355 return 0 474 return 0
356 else 475 else
357 return 1 476 return 1
358 fi 477 fi
359} 478}
360 479
480# @FUNCTION: strip-unsupported-flags
481# @DESCRIPTION:
482# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
361strip-unsupported-flags() { 483strip-unsupported-flags() {
362 local x NEW_CFLAGS NEW_CXXFLAGS 484 export CFLAGS=$(test-flags-CC ${CFLAGS})
363 485 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
364 for x in ${CFLAGS} ; do 486 export FFLAGS=$(test-flags-F77 ${FFLAGS})
365 NEW_CFLAGS="${NEW_CFLAGS} $(test-flags ${x})" 487 export FCFLAGS=$(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} 488}
374 489
490# @FUNCTION: get-flag
491# @USAGE: <flag>
492# @DESCRIPTION:
493# Find and echo the value for a particular flag. Accepts shell globs.
375get-flag() { 494get-flag() {
376 local f findflag="$1" 495 local f var findflag="$1"
377 496
378 # this code looks a little flaky but seems to work for 497 # this code looks a little flaky but seems to work for
379 # everything we want ... 498 # everything we want ...
380 # for example, if CFLAGS="-march=i686": 499 # for example, if CFLAGS="-march=i686":
381 # `get-flag -march` == "-march=i686" 500 # `get-flag -march` == "-march=i686"
382 # `get-flag march` == "i686" 501 # `get-flag march` == "i686"
383 for f in ${CFLAGS} ${CXXFLAGS} ; do 502 for var in $(all-flag-vars) ; do
503 for f in ${!var} ; do
384 if [ "${f/${findflag}}" != "${f}" ] ; then 504 if [ "${f/${findflag}}" != "${f}" ] ; then
385 printf "%s\n" "${f/-${findflag}=}" 505 printf "%s\n" "${f/-${findflag}=}"
386 return 0 506 return 0
387 fi 507 fi
508 done
388 done 509 done
389 return 1 510 return 1
390} 511}
391 512
392# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 513# @FUNCTION: has_m64
393has_hardened() { 514# @DESCRIPTION:
394 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 515# This doesn't test if the flag is accepted, it tests if the flag actually
395 516# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
396 test_version_info Hardened && return 0 517# return code is 0, else the return code is 1.
397 # The specs file wont exist unless gcc has GCC_SPECS support
398 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
399}
400
401# DEPRECATED - use gcc-specs-pie from toolchain-funcs
402# indicate whether PIC is set
403has_pic() {
404 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
405
406 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
407 ${CFLAGS/-fpic} != ${CFLAGS} || \
408 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
409}
410
411# DEPRECATED - use gcc-specs-pie from toolchain-funcs
412# indicate whether PIE is set
413has_pie() {
414 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
415
416 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
417 ${CFLAGS/-fpie} != ${CFLAGS} || \
418 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__) || \
419 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__) ]]
420 # test PIC while waiting for specs to be updated to generate __PIE__
421}
422
423# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
424# indicate whether code for SSP is being generated for all functions
425has_ssp_all() {
426 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
427
428 # note; this matches only -fstack-protector-all
429 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
430 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
431 gcc-specs-ssp
432}
433
434# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
435# indicate whether code for SSP is being generated
436has_ssp() {
437 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
438
439 # note; this matches both -fstack-protector and -fstack-protector-all
440 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
441 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
442 gcc-specs-ssp
443}
444
445has_m64() { 518has_m64() {
519 eqawarn "${FUNCNAME}: don't use this anymore"
520
446 # this doesnt test if the flag is accepted, it tests if the flag 521 # 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! 522 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
448 # please dont replace this function with test_flag in some future 523 # please dont replace this function with test_flag in some future
449 # clean-up! 524 # clean-up!
450 525
… …
457 [[ ${ret} != 1 ]] && return 0 532 [[ ${ret} != 1 ]] && return 0
458 return 1 533 return 1
459} 534}
460 535
461has_m32() { 536has_m32() {
462 # this doesnt test if the flag is accepted, it tests if the flag 537 die "${FUNCNAME}: don't use this anymore"
463 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
464 # please dont replace this function with test_flag in some future
465 # clean-up!
466
467 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
468
469 local temp=$(emktemp)
470 echo "int main() { return(0); }" > "${temp}".c
471 MY_CC=$(tc-getCC)
472 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
473 local ret=$?
474 rm -f "${temp}".c
475 [[ ${ret} != 1 ]] && return 0
476 return 1
477} 538}
478 539
540# @FUNCTION: replace-sparc64-flags
541# @DESCRIPTION:
542# Sets mcpu to v8 and uses the original value as mtune if none specified.
479replace-sparc64-flags() { 543replace-sparc64-flags() {
480 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 544 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
481 545
482 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 546 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
483 for x in ${SPARC64_CPUS}; do 547 for x in ${SPARC64_CPUS}; do
484 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 548 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
485 done 549 done
486 else 550 else
487 for x in ${SPARC64_CPUS}; do 551 for x in ${SPARC64_CPUS}; do
488 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 552 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
489 done 553 done
490 fi 554 fi
491 555
492 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 556 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
493 for x in ${SPARC64_CPUS}; do 557 for x in ${SPARC64_CPUS}; do
494 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 558 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
495 done 559 done
496 else 560 else
497 for x in ${SPARC64_CPUS}; do 561 for x in ${SPARC64_CPUS}; do
498 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 562 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
499 done 563 done
500 fi 564 fi
501 565
502 export CFLAGS CXXFLAGS 566 export CFLAGS CXXFLAGS
503} 567}
504 568
569# @FUNCTION: append-libs
570# @USAGE: <libs>
571# @DESCRIPTION:
572# Add extra <libs> to the current LIBS.
505append-ldflags() { 573append-libs() {
506 export LDFLAGS="${LDFLAGS} $*" 574 [[ $# -eq 0 ]] && return 0
507 return 0 575 local flag
508}
509
510filter-ldflags() {
511 local x
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 576 for flag in "$@"; do
517 LDFLAGS=${LDFLAGS// ${x} / } 577 [[ ${flag} == -l* ]] && flag=${flag#-l}
578 export LIBS="${LIBS} -l${flag}"
518 done 579 done
519 [[ -z ${LDFLAGS// } ]] \
520 && LDFLAGS="" \
521 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
522 export LDFLAGS
523 return 0
524}
525 580
581 return 0
582}
583
584# @FUNCTION: raw-ldflags
585# @USAGE: [flags]
586# @DESCRIPTION:
526# Turn C style ldflags (-Wl,-foo) into straight ldflags 587# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
588# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
589# to gcc where it needs the '-Wl,'.
590#
591# If no flags are specified, then default to ${LDFLAGS}.
527raw-ldflags() { 592raw-ldflags() {
528 local x input="$@" 593 local x input="$@"
529 [[ -z ${input} ]] && input=${LDFLAGS} 594 [[ -z ${input} ]] && input=${LDFLAGS}
530 set -- 595 set --
531 for x in ${input} ; do 596 for x in ${input} ; do
… …
533 set -- "$@" ${x//,/ } 598 set -- "$@" ${x//,/ }
534 done 599 done
535 echo "$@" 600 echo "$@"
536} 601}
537 602
538fstack-flags() { 603# @FUNCTION: no-as-needed
539 if gcc-specs-ssp; then 604# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
540 [ -z "`is-flag -fno-stack-protector`" ] && 605no-as-needed() {
541 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
542 fi
543 return 0
544}
545
546# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>,
547# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more
548# fixes.
549#
550# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3
551gcc2-flags() {
552 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then
553 CFLAGS=${CFLAGS//-mtune=/-mcpu=}
554 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=}
555 fi
556
557 replace-cpu-flags k6-{2,3} k6
558 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686
559
560 replace-cpu-flags pentium-mmx i586
561 replace-cpu-flags pentium{2,3,4} i686
562
563 replace-cpu-flags ev6{7,8} ev6
564
565 export CFLAGS CXXFLAGS
566}
567
568# Gets the flags needed for "NOW" binding
569bindnow-flags() {
570 case $($(tc-getLD) -v 2>&1 </dev/null) in 606 case $($(tc-getLD) -v 2>&1 </dev/null) in
571 *GNU* | *'with BFD'*) # GNU ld 607 *GNU*) # GNU ld
572 echo "-Wl,-z,now" ;; 608 echo "-Wl,--no-as-needed" ;;
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 609 esac
583} 610}
611
612fi
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