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Revision 1.1.1.1 Revision 1.197
1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2014 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 1.197 2014/02/02 22:26:13 tommy 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 -frecord-gcc-switches"
33 ALLOWED_FLAGS+=" -fdiagnostics*"
34 ALLOWED_FLAGS+=" -W* -w"
35
104 # allow a bunch of flags that negate features / control ABI 36 # allow a bunch of flags that negate features / control ABI
105 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 37 ALLOWED_FLAGS+=" -fno-stack-protector -fno-stack-protector-all \
38 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
39 -fno-omit-frame-pointer -fno-builtin*"
106 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 40 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
107 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 41 -mno-sse2 -mno-sse3 -mno-ssse3 -mno-sse4 -mno-sse4.1 -mno-sse4.2 \
42 -mno-avx -mno-aes -mno-pclmul -mno-sse4a -mno-3dnow -mno-popcnt \
108 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 43 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
109 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 44 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
110 -mieee -mieee-with-inexact \ 45 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
111 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 46 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
112 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 47 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
113 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 48 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
114 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 49 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi \
50 -D* -U*"
115 51
116 # C[XX]FLAGS that we are think is ok, but needs testing 52 # 4.5
117 # NOTE: currently -Os have issues with gcc3 and K6* arch's 53 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
118 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 54 # 4.6
119 return 0 55 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
120} 56 # 4.7
57 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
58 # 4.8
59 ALLOWED_FLAGS+=" -mno-fxsr -mno-rtm -mno-xsave -mno-xsaveopt"
60 # 4.9
61 ALLOWED_FLAGS+=" -mno-avx512cd -mno-avx512er -mno-avx512f -mno-avx512pf -mno-sha"
121 62
63 # CPPFLAGS and LDFLAGS
64 ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
65
66 export ALLOWED_FLAGS
67 return 0
68}
69
70# inverted filters for hardened compiler. This is trying to unpick
71# the hardened compiler defaults.
72_filter-hardened() {
73 local f
74 for f in "$@" ; do
75 case "${f}" in
76 # Ideally we should only concern ourselves with PIE flags,
77 # not -fPIC or -fpic, but too many places filter -fPIC without
78 # thinking about -fPIE.
79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
80 gcc-specs-pie || continue
81 is-flagq -nopie || append-flags -nopie;;
82 -fstack-protector)
83 gcc-specs-ssp || continue
84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
85 -fstack-protector-all)
86 gcc-specs-ssp-to-all || continue
87 is-flagq -fno-stack-protector-all || append-flags $(test-flags -fno-stack-protector-all);;
88 -fno-strict-overflow)
89 gcc-specs-nostrict || continue
90 is-flagq -fstrict-overflow || append-flags $(test-flags -fstrict-overflow);;
91 esac
92 done
93}
94
95# Remove occurrences of strings from variable given in $1
96# Strings removed are matched as globs, so for example
97# '-O*' would remove -O1, -O2 etc.
98_filter-var() {
99 local f x var=$1 new=()
100 shift
101
102 for f in ${!var} ; do
103 for x in "$@" ; do
104 # Note this should work with globs like -O*
105 [[ ${f} == ${x} ]] && continue 2
106 done
107 new+=( "${f}" )
108 done
109 eval export ${var}=\""${new[*]}"\"
110}
111
112# @FUNCTION: filter-flags
113# @USAGE: <flags>
114# @DESCRIPTION:
115# Remove particular <flags> from {C,CPP,CXX,CCAS,F,FC,LD}FLAGS. Accepts shell globs.
122filter-flags() { 116filter-flags() {
123 local x f fset 117 _filter-hardened "$@"
124 declare -a new_CFLAGS new_CXXFLAGS 118 local v
119 for v in $(all-flag-vars) ; do
120 _filter-var ${v} "$@"
121 done
122 return 0
123}
125 124
125# @FUNCTION: filter-lfs-flags
126# @DESCRIPTION:
127# Remove flags that enable Large File Support.
128filter-lfs-flags() {
129 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
130 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
131 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
132 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
133 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135}
136
137# @FUNCTION: filter-ldflags
138# @USAGE: <flags>
139# @DESCRIPTION:
140# Remove particular <flags> from LDFLAGS. Accepts shell globs.
141filter-ldflags() {
142 _filter-var LDFLAGS "$@"
143 return 0
144}
145
146# @FUNCTION: append-cppflags
147# @USAGE: <flags>
148# @DESCRIPTION:
149# Add extra <flags> to the current CPPFLAGS.
150append-cppflags() {
151 [[ $# -eq 0 ]] && return 0
152 export CPPFLAGS+=" $*"
153 return 0
154}
155
156# @FUNCTION: append-cflags
157# @USAGE: <flags>
158# @DESCRIPTION:
159# Add extra <flags> to the current CFLAGS. If a flag might not be supported
160# with different compilers (or versions), then use test-flags-CC like so:
161# @CODE
162# append-cflags $(test-flags-CC -funky-flag)
163# @CODE
164append-cflags() {
165 [[ $# -eq 0 ]] && return 0
166 # Do not do automatic flag testing ourselves. #417047
167 export CFLAGS+=" $*"
168 return 0
169}
170
171# @FUNCTION: append-cxxflags
172# @USAGE: <flags>
173# @DESCRIPTION:
174# Add extra <flags> to the current CXXFLAGS. If a flag might not be supported
175# with different compilers (or versions), then use test-flags-CXX like so:
176# @CODE
177# append-cxxflags $(test-flags-CXX -funky-flag)
178# @CODE
179append-cxxflags() {
180 [[ $# -eq 0 ]] && return 0
181 # Do not do automatic flag testing ourselves. #417047
182 export CXXFLAGS+=" $*"
183 return 0
184}
185
186# @FUNCTION: append-fflags
187# @USAGE: <flags>
188# @DESCRIPTION:
189# Add extra <flags> to the current {F,FC}FLAGS. If a flag might not be supported
190# with different compilers (or versions), then use test-flags-F77 like so:
191# @CODE
192# append-fflags $(test-flags-F77 -funky-flag)
193# @CODE
194append-fflags() {
195 [[ $# -eq 0 ]] && return 0
196 # Do not do automatic flag testing ourselves. #417047
197 export FFLAGS+=" $*"
198 export FCFLAGS+=" $*"
199 return 0
200}
201
202# @FUNCTION: append-lfs-flags
203# @DESCRIPTION:
204# Add flags that enable Large File Support.
205append-lfs-flags() {
206 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
207 # see comments in filter-lfs-flags func for meaning of these
208 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
209}
210
211# @FUNCTION: append-ldflags
212# @USAGE: <flags>
213# @DESCRIPTION:
214# Add extra <flags> to the current LDFLAGS.
215append-ldflags() {
216 [[ $# -eq 0 ]] && return 0
217 local flag
126 for x in "$@" ; do 218 for flag in "$@"; do
219 [[ ${flag} == -l* ]] && \
220 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
221 done
222
223 export LDFLAGS="${LDFLAGS} $*"
224 return 0
225}
226
227# @FUNCTION: append-flags
228# @USAGE: <flags>
229# @DESCRIPTION:
230# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
231append-flags() {
232 [[ $# -eq 0 ]] && return 0
127 case "${x}" in 233 case " $* " in
128 -fPIC|-fpic|-fPIE|-fpie|-pie) 234 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
129 append-flags `test_flag -fno-pie`;; 235 *' '-L*|\
130 -fstack-protector|-fstack-protector-all) 236 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
131 fstack-flags;;
132 esac 237 esac
133 done 238 append-cflags "$@"
239 append-cxxflags "$@"
240 append-fflags "$@"
241 return 0
242}
134 243
135 for fset in CFLAGS CXXFLAGS; do 244# @FUNCTION: replace-flags
245# @USAGE: <old> <new>
246# @DESCRIPTION:
247# Replace the <old> flag with <new>. Accepts shell globs for <old>.
248replace-flags() {
249 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
250
251 local f var new
252 for var in $(all-flag-vars) ; do
136 # Looping over the flags instead of using a global 253 # Looping over the flags instead of using a global
137 # substitution ensures that we're working with flag atoms. 254 # substitution ensures that we're working with flag atoms.
138 # Otherwise globs like -O* have the potential to wipe out the 255 # Otherwise globs like -O* have the potential to wipe out the
139 # list of flags. 256 # list of flags.
257 new=()
140 for f in ${!fset}; do 258 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* 259 # Note this should work with globs like -O*
187 [[ ${f} == ${1} ]] && f=${2} 260 [[ ${f} == ${1} ]] && f=${2}
188 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 261 new+=( "${f}" )
189 done
190 eval export ${fset}=\${new_${fset}\[*]}
191 done 262 done
263 eval export ${var}=\""${new[*]}"\"
264 done
192 265
193 return 0 266 return 0
194} 267}
195 268
269# @FUNCTION: replace-cpu-flags
270# @USAGE: <old> <new>
271# @DESCRIPTION:
272# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
273# with flags that select the <new> cpu. Accepts shell globs for <old>.
196replace-cpu-flags() { 274replace-cpu-flags() {
197 local newcpu="$#" ; newcpu="${!newcpu}" 275 local newcpu="$#" ; newcpu="${!newcpu}"
198 while [ $# -gt 1 ] ; do 276 while [ $# -gt 1 ] ; do
199 # quote to make sure that no globbing is done (particularly on 277 # quote to make sure that no globbing is done (particularly on
200 # ${oldcpu} prior to calling replace-flags 278 # ${oldcpu}) prior to calling replace-flags
201 replace-flags "-march=${1}" "-march=${newcpu}" 279 replace-flags "-march=${1}" "-march=${newcpu}"
202 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 280 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
203 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 281 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
204 shift 282 shift
205 done 283 done
206 return 0 284 return 0
207} 285}
208 286
287_is_flagq() {
288 local x var
289 eval var=\""\${$1[*]}"\"
290 for x in ${var} ; do
291 [[ ${x} == $2 ]] && return 0
292 done
293 return 1
294}
295
296# @FUNCTION: is-flagq
297# @USAGE: <flag>
298# @DESCRIPTION:
299# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
300is-flagq() {
301 [[ -n $2 ]] && die "Usage: is-flag <flag>"
302
303 local var
304 for var in $(all-flag-vars) ; do
305 _is_flagq ${var} "$1" && return 0
306 done
307 return 1
308}
309
310# @FUNCTION: is-flag
311# @USAGE: <flag>
312# @DESCRIPTION:
313# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
209is-flag() { 314is-flag() {
210 local x 315 is-flagq "$@" && 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} 316}
221 317
318# @FUNCTION: is-ldflagq
319# @USAGE: <flag>
320# @DESCRIPTION:
321# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
322is-ldflagq() {
323 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
324 _is_flagq LDFLAGS $1
325}
326
327# @FUNCTION: is-ldflag
328# @USAGE: <flag>
329# @DESCRIPTION:
330# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
331is-ldflag() {
332 is-ldflagq "$@" && echo true
333}
334
335# @FUNCTION: filter-mfpmath
336# @USAGE: <math types>
337# @DESCRIPTION:
338# Remove specified math types from the fpmath flag. For example, if the user
339# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
340# -mfpmath=386.
222filter-mfpmath() { 341filter-mfpmath() {
223 local orig_mfpmath new_math prune_math 342 local orig_mfpmath new_math prune_math
224 343
225 # save the original -mfpmath flag 344 # save the original -mfpmath flag
226 orig_mfpmath="`get-flag -mfpmath`" 345 orig_mfpmath=$(get-flag -mfpmath)
227 # get the value of the current -mfpmath flag 346 # get the value of the current -mfpmath flag
228 new_math=" `get-flag mfpmath | tr , ' '` " 347 new_math=$(get-flag mfpmath)
348 # convert "both" to something we can filter
349 new_math=${new_math/both/387,sse}
350 new_math=" ${new_math//[,+]/ } "
229 # figure out which math values are to be removed 351 # figure out which math values are to be removed
230 prune_math="" 352 prune_math=""
231 for prune_math in "$@" ; do 353 for prune_math in "$@" ; do
232 new_math="${new_math/ ${prune_math} / }" 354 new_math=${new_math/ ${prune_math} / }
233 done 355 done
234 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 356 new_math=$(echo ${new_math})
357 new_math=${new_math// /,}
235 358
236 if [ -z "${new_math}" ] ; then 359 if [[ -z ${new_math} ]] ; then
237 # if we're removing all user specified math values are 360 # if we're removing all user specified math values are
238 # slated for removal, then we just filter the flag 361 # slated for removal, then we just filter the flag
239 filter-flags ${orig_mfpmath} 362 filter-flags ${orig_mfpmath}
240 else 363 else
241 # if we only want to filter some of the user specified 364 # if we only want to filter some of the user specified
243 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 366 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
244 fi 367 fi
245 return 0 368 return 0
246} 369}
247 370
371# @FUNCTION: strip-flags
372# @DESCRIPTION:
373# Strip *FLAGS of everything except known good/safe flags. This runs over all
374# flags returned by all_flag_vars().
248strip-flags() { 375strip-flags() {
249 local x y flag NEW_CFLAGS NEW_CXXFLAGS 376 local x y var
250 377
251 setup-allowed-flags 378 setup-allowed-flags
252 379
253 local NEW_CFLAGS="" 380 set -f # disable pathname expansion
254 local NEW_CXXFLAGS=""
255 381
256 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 382 for var in $(all-flag-vars) ; do
257 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 383 local new=()
258 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 384
385 for x in ${!var} ; do
386 local flag=${x%%=*}
387 for y in ${ALLOWED_FLAGS} ; do
388 if [[ -z ${flag%%${y}} ]] ; then
389 new+=( "${x}" )
390 break
391 fi
392 done
393 done
394
395 # In case we filtered out all optimization flags fallback to -O2
396 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
397 new+=( -O2 )
398 fi
399
400 if [[ ${!var} != "${new[*]}" ]] ; then
401 einfo "strip-flags: ${var}: changed '${!var}' to '${new[*]}'"
402 fi
403 eval export ${var}=\""${new[*]}"\"
404 done
405
406 set +f # re-enable pathname expansion
407
408 return 0
409}
410
411test-flag-PROG() {
412 local comp=$1
413 local lang=$2
414 local flag=$3
415
416 [[ -z ${comp} || -z ${flag} ]] && return 1
417
418 # use -c so we can test the assembler as well
419 local PROG=$(tc-get${comp})
420 if ${PROG} -c -o /dev/null -x${lang} - < /dev/null > /dev/null 2>&1 ; then
421 ${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \
422 > /dev/null 2>&1
423 else
424 ${PROG} "${flag}" -c -o /dev/null /dev/null > /dev/null 2>&1
259 fi 425 fi
426}
260 427
261 set -f # disable pathname expansion 428# @FUNCTION: test-flag-CC
429# @USAGE: <flag>
430# @DESCRIPTION:
431# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
432test-flag-CC() { test-flag-PROG "CC" c "$1"; }
262 433
263 for x in ${CFLAGS}; do 434# @FUNCTION: test-flag-CXX
264 for y in ${ALLOWED_FLAGS}; do 435# @USAGE: <flag>
265 flag=${x%%=*} 436# @DESCRIPTION:
266 if [ "${flag%%${y}}" = "" ] ; then 437# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
267 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 438test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
268 break 439
269 fi 440# @FUNCTION: test-flag-F77
441# @USAGE: <flag>
442# @DESCRIPTION:
443# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
444test-flag-F77() { test-flag-PROG "F77" f77 "$1"; }
445
446# @FUNCTION: test-flag-FC
447# @USAGE: <flag>
448# @DESCRIPTION:
449# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
450test-flag-FC() { test-flag-PROG "FC" f95 "$1"; }
451
452test-flags-PROG() {
453 local comp=$1
454 local flags=()
455 local x
456
457 shift
458
459 [[ -z ${comp} ]] && return 1
460
461 for x ; do
462 test-flag-${comp} "${x}" && flags+=( "${x}" )
270 done 463 done
271 done
272 464
273 for x in ${CXXFLAGS}; do 465 echo "${flags[*]}"
274 for y in ${ALLOWED_FLAGS}; do
275 flag=${x%%=*}
276 if [ "${flag%%${y}}" = "" ] ; then
277 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
278 break
279 fi
280 done
281 done
282 466
283 # In case we filtered out all optimization flags fallback to -O2 467 # Just bail if we dont have any flags
284 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 468 [[ ${#flags[@]} -gt 0 ]]
285 NEW_CFLAGS="${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} 469}
297 470
298test_flag() { 471# @FUNCTION: test-flags-CC
299 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 472# @USAGE: <flags>
300 printf "%s\n" "$*" 473# @DESCRIPTION:
301 return 0 474# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
302 fi 475test-flags-CC() { test-flags-PROG "CC" "$@"; }
303 return 1
304}
305 476
477# @FUNCTION: test-flags-CXX
478# @USAGE: <flags>
479# @DESCRIPTION:
480# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
481test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
482
483# @FUNCTION: test-flags-F77
484# @USAGE: <flags>
485# @DESCRIPTION:
486# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
487test-flags-F77() { test-flags-PROG "F77" "$@"; }
488
489# @FUNCTION: test-flags-FC
490# @USAGE: <flags>
491# @DESCRIPTION:
492# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
493test-flags-FC() { test-flags-PROG "FC" "$@"; }
494
495# @FUNCTION: test-flags
496# @USAGE: <flags>
497# @DESCRIPTION:
498# Short-hand that should hopefully work for both C and C++ compiler, but
499# its really only present due to the append-flags() abomination.
500test-flags() { test-flags-CC "$@"; }
501
502# @FUNCTION: test_version_info
503# @USAGE: <version>
504# @DESCRIPTION:
505# Returns shell true if the current C compiler version matches <version>, else returns shell false.
506# Accepts shell globs.
306test_version_info() { 507test_version_info() {
307 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 508 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
308 return 0 509 return 0
309 else 510 else
310 return 1 511 return 1
311 fi 512 fi
312} 513}
313 514
515# @FUNCTION: strip-unsupported-flags
516# @DESCRIPTION:
517# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
314strip-unsupported-flags() { 518strip-unsupported-flags() {
315 local x NEW_CFLAGS NEW_CXXFLAGS 519 export CFLAGS=$(test-flags-CC ${CFLAGS})
316 520 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
317 for x in ${CFLAGS} ; do 521 export FFLAGS=$(test-flags-F77 ${FFLAGS})
318 NEW_CFLAGS="${NEW_CFLAGS} $(test_flag ${x})" 522 export FCFLAGS=$(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} 523}
327 524
525# @FUNCTION: get-flag
526# @USAGE: <flag>
527# @DESCRIPTION:
528# Find and echo the value for a particular flag. Accepts shell globs.
328get-flag() { 529get-flag() {
329 local f findflag="$1" 530 local f var findflag="$1"
330 531
331 # this code looks a little flaky but seems to work for 532 # this code looks a little flaky but seems to work for
332 # everything we want ... 533 # everything we want ...
333 # for example, if CFLAGS="-march=i686": 534 # for example, if CFLAGS="-march=i686":
334 # `get-flag -march` == "-march=i686" 535 # `get-flag -march` == "-march=i686"
335 # `get-flag march` == "i686" 536 # `get-flag march` == "i686"
336 for f in ${CFLAGS} ${CXXFLAGS} ; do 537 for var in $(all-flag-vars) ; do
538 for f in ${!var} ; do
337 if [ "${f/${findflag}}" != "${f}" ] ; then 539 if [ "${f/${findflag}}" != "${f}" ] ; then
338 printf "%s\n" "${f/-${findflag}=}" 540 printf "%s\n" "${f/-${findflag}=}"
339 return 0 541 return 0
340 fi 542 fi
543 done
341 done 544 done
342 return 1 545 return 1
343} 546}
344 547
345# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 548# @FUNCTION: has_m64
346has_hardened() { 549# @DESCRIPTION:
347 test_version_info Hardened && return 0 550# This doesn't test if the flag is accepted, it tests if the flag actually
348 # the specs file wont exist unless gcc has GCC_SPECS support 551# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
349 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 552# 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) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0
390 gcc-specs-ssp && return 0
391 return 1
392}
393
394has_m64() { 553has_m64() {
554 eqawarn "${FUNCNAME}: don't use this anymore"
555
395 # this doesnt test if the flag is accepted, it tests if the flag 556 # 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! 557 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
397 # please dont replace this function with test_flag in some future 558 # please dont replace this function with test_flag in some future
398 # clean-up! 559 # clean-up!
560
399 local temp="$(emktemp)" 561 local temp="$(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); }" > "${temp}".c 562 echo "int main() { return(0); }" > "${temp}".c
419 MY_CC=$(tc-getCC) 563 MY_CC=$(tc-getCC)
420 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1 564 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
421 local ret=$? 565 local ret=$?
422 rm -f "${temp}".c 566 rm -f "${temp}".c
423 [ "$ret" != "1" ] && return 0 567 [[ ${ret} != 1 ]] && return 0
424 return 1 568 return 1
425} 569}
426 570
571has_m32() {
572 die "${FUNCNAME}: don't use this anymore"
573}
574
575# @FUNCTION: replace-sparc64-flags
576# @DESCRIPTION:
577# Sets mcpu to v8 and uses the original value as mtune if none specified.
427replace-sparc64-flags() { 578replace-sparc64-flags() {
428 local SPARC64_CPUS="ultrasparc v9" 579 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
429 580
430 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 581 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
431 for x in ${SPARC64_CPUS}; do 582 for x in ${SPARC64_CPUS}; do
432 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 583 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
433 done 584 done
434 else 585 else
435 for x in ${SPARC64_CPUS}; do 586 for x in ${SPARC64_CPUS}; do
436 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 587 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
437 done 588 done
438 fi 589 fi
439 590
440 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 591 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
441 for x in ${SPARC64_CPUS}; do 592 for x in ${SPARC64_CPUS}; do
442 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 593 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
443 done 594 done
444 else 595 else
445 for x in ${SPARC64_CPUS}; do 596 for x in ${SPARC64_CPUS}; do
446 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 597 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
447 done 598 done
448 fi 599 fi
449 600
450 export CFLAGS CXXFLAGS 601 export CFLAGS CXXFLAGS
451} 602}
452 603
604# @FUNCTION: append-libs
605# @USAGE: <libs>
606# @DESCRIPTION:
607# Add extra <libs> to the current LIBS. All arguments should be prefixed with
608# either -l or -L. For compatibility, if arguments are not prefixed as
609# options, they are given a -l prefix automatically.
453append-ldflags() { 610append-libs() {
454 export LDFLAGS="${LDFLAGS} $*" 611 [[ $# -eq 0 ]] && return 0
455 return 0 612 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 613 for flag in "$@"; do
465 LDFLAGS=${LDFLAGS// ${x} / } 614 case $flag in
615 -[lL]*)
616 export LIBS="${LIBS} ${flag}"
617 ;;
618 -*)
619 eqawarn "Appending non-library to LIBS (${flag}); Other linker flags should be passed via LDFLAGS"
620 export LIBS="${LIBS} ${flag}"
621 ;;
622 *)
623 export LIBS="${LIBS} -l${flag}"
624 esac
466 done 625 done
467 [[ -z ${LDFLAGS// } ]] \
468 && LDFLAGS="" \
469 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
470 export LDFLAGS
471 return 0
472}
473 626
474fstack-flags() {
475 if gcc-specs-ssp; then
476 [ -z "`is-flag -fno-stack-protector`" ] &&
477 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`"
478 fi
479 return 0 627 return 0
480} 628}
481 629
482# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 630# @FUNCTION: raw-ldflags
483# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 631# @USAGE: [flags]
484# fixes. 632# @DESCRIPTION:
633# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
634# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
635# to gcc where it needs the '-Wl,'.
485# 636#
486# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 637# If no flags are specified, then default to ${LDFLAGS}.
487gcc2-flags() { 638raw-ldflags() {
488 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 639 local x input="$@"
489 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 640 [[ -z ${input} ]] && input=${LDFLAGS}
490 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 641 set --
491 fi 642 for x in ${input} ; do
492 643 case ${x} in
493 replace-cpu-flags k6-{2,3} k6 644 -Wl,*)
494 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 645 x=${x#-Wl,}
495 646 set -- "$@" ${x//,/ }
496 replace-cpu-flags pentium-mmx i586 647 ;;
497 replace-cpu-flags pentium{2,3,4} i686 648 *) # Assume it's a compiler driver flag, so throw it away #441808
498 649 ;;
499 replace-cpu-flags ev6{7,8} ev6 650 esac
500 651 done
501 export CFLAGS CXXFLAGS 652 echo "$@"
502} 653}
503 654
504# Gets the flags needed for "NOW" binding 655# @FUNCTION: no-as-needed
505bindnow-flags() { 656# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
657no-as-needed() {
506 case $($(tc-getLD) -v 2>&1 </dev/null) in 658 case $($(tc-getLD) -v 2>&1 </dev/null) in
507 *GNU* | *'with BFD'*) # GNU ld 659 *GNU*) # GNU ld
508 echo "-Wl,-z,now" ;; 660 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 661 esac
519} 662}
663
664fi

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