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1# Copyright 1999-2006 Gentoo Foundation 1# Copyright 1999-2013 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.114 2006/12/27 00:52:12 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.191 2013/10/27 07:21:05 mgorny Exp $
4#
5# Maintainer: base-system@gentoo.org
6 4
7# need access to emktemp() 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.
12
13if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
14___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
15
8inherit eutils toolchain-funcs multilib 16inherit eutils toolchain-funcs multilib
9 17
10# 18# Return all the flag variables that our high level funcs operate on.
11#### filter-flags <flags> #### 19all-flag-vars() {
12# Remove particular flags from C[XX]FLAGS 20 echo {C,CPP,CXX,CCAS,F,FC,LD}FLAGS
13# Matches only complete flags 21}
14#
15#### append-flags <flags> ####
16# Add extra flags to your current C[XX]FLAGS
17#
18#### replace-flags <orig.flag> <new.flag> ###
19# Replace a flag by another one
20#
21#### replace-cpu-flags <old.cpus> <new.cpu> ###
22# Replace march/mcpu flags that specify <old.cpus>
23# with flags that specify <new.cpu>
24#
25#### is-flag[q] <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28# q version sets return code but doesn't echo
29#
30#### is-ldflag[q] <flag> ####
31# Returns "true" if flag is set in LDFLAGS
32# Matches only complete a flag
33# q version sets return code but doesn't echo
34#
35#### strip-flags ####
36# Strip C[XX]FLAGS of everything except known
37# good options.
38#
39#### strip-unsupported-flags ####
40# Strip C[XX]FLAGS of any flags not supported by
41# installed version of gcc
42#
43#### get-flag <flag> ####
44# Find and echo the value for a particular flag
45#
46#### replace-sparc64-flags ####
47# Sets mcpu to v8 and uses the original value
48# as mtune if none specified.
49#
50#### filter-mfpmath <math types> ####
51# Remove specified math types from the fpmath specification
52# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
53# will leave the user with -mfpmath=386
54#
55#### append-ldflags ####
56# Add extra flags to your current LDFLAGS
57#
58#### filter-ldflags <flags> ####
59# Remove particular flags from LDFLAGS
60# Matches only complete flags
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="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
102 export ALLOWED_FLAGS="${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 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive -frecord-gcc-switches"
104 fi 33 ALLOWED_FLAGS+=" -W* -w"
34
105 # allow a bunch of flags that negate features / control ABI 35 # allow a bunch of flags that negate features / control ABI
106 ALLOWED_FLAGS="${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"
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 39 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
108 -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 \
109 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 42 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
110 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 43 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
111 -mieee -mieee-with-inexact -mschedule \ 44 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
112 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 45 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
113 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 46 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
114 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 47 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
115 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 48 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi \
116 -msecure-plt" 49 -D* -U*"
117 50
118 # C[XX]FLAGS that we are think is ok, but needs testing 51 # 4.5
119 # NOTE: currently -Os have issues with gcc3 and K6* arch's 52 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
120 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 53 # 4.6
54 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
55 # 4.7
56 ALLOWED_FLAGS+=" -mno-avx2 -mno-bmi2 -mno-fma -mno-lzcnt"
57
58 # CPPFLAGS and LDFLAGS
59 ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
60
61 export ALLOWED_FLAGS
121 return 0 62 return 0
122} 63}
123 64
124# inverted filters for hardened compiler. This is trying to unpick 65# inverted filters for hardened compiler. This is trying to unpick
125# the hardened compiler defaults. 66# the hardened compiler defaults.
133 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 74 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
134 gcc-specs-pie || continue 75 gcc-specs-pie || continue
135 is-flagq -nopie || append-flags -nopie;; 76 is-flagq -nopie || append-flags -nopie;;
136 -fstack-protector) 77 -fstack-protector)
137 gcc-specs-ssp || continue 78 gcc-specs-ssp || continue
138 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 79 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
139 -fstack-protector-all) 80 -fstack-protector-all)
140 gcc-specs-ssp-to-all || continue 81 gcc-specs-ssp-to-all || continue
141 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 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);;
142 esac 86 esac
143 done 87 done
144} 88}
145 89
146# Remove occurrences of strings from variable given in $1 90# Remove occurrences of strings from variable given in $1
147# Strings removed are matched as globs, so for example 91# Strings removed are matched as globs, so for example
148# '-O*' would remove -O1, -O2 etc. 92# '-O*' would remove -O1, -O2 etc.
149_filter-var() { 93_filter-var() {
150 local f x VAR VAL 94 local f x var=$1 new=()
151 declare -a new
152
153 VAR=$1
154 shift 95 shift
155 eval VAL=\${${VAR}} 96
156 for f in ${VAL}; do 97 for f in ${!var} ; do
157 for x in "$@"; do 98 for x in "$@" ; do
158 # Note this should work with globs like -O* 99 # Note this should work with globs like -O*
159 [[ ${f} == ${x} ]] && continue 2 100 [[ ${f} == ${x} ]] && continue 2
160 done 101 done
161 eval new\[\${\#new\[@]}]=\${f} 102 new+=( "${f}" )
162 done 103 done
163 eval export ${VAR}=\${new\[*]} 104 eval export ${var}=\""${new[*]}"\"
164} 105}
165 106
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.
166filter-flags() { 111filter-flags() {
167 _filter-hardened "$@" 112 _filter-hardened "$@"
113 local v
114 for v in $(all-flag-vars) ; do
168 _filter-var CFLAGS "$@" 115 _filter-var ${v} "$@"
169 _filter-var CXXFLAGS "$@" 116 done
170 return 0 117 return 0
171} 118}
172 119
120# @FUNCTION: filter-lfs-flags
121# @DESCRIPTION:
122# Remove flags that enable Large File Support.
173filter-lfs-flags() { 123filter-lfs-flags() {
174 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 124 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
125 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
126 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
127 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
128 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
175 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 129 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
176} 130}
177 131
132# @FUNCTION: filter-ldflags
133# @USAGE: <flags>
134# @DESCRIPTION:
135# Remove particular <flags> from LDFLAGS. Accepts shell globs.
136filter-ldflags() {
137 _filter-var LDFLAGS "$@"
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+=" $*"
148 return 0
149}
150
151# @FUNCTION: append-cflags
152# @USAGE: <flags>
153# @DESCRIPTION:
154# Add extra <flags> to the current CFLAGS. If a flag might not be supported
155# with different compilers (or versions), then use test-flags-CC like so:
156# @CODE
157# append-cflags $(test-flags-CC -funky-flag)
158# @CODE
159append-cflags() {
160 [[ $# -eq 0 ]] && return 0
161 # Do not do automatic flag testing ourselves. #417047
162 export CFLAGS+=" $*"
163 return 0
164}
165
166# @FUNCTION: append-cxxflags
167# @USAGE: <flags>
168# @DESCRIPTION:
169# Add extra <flags> to the current CXXFLAGS. If a flag might not be supported
170# with different compilers (or versions), then use test-flags-CXX like so:
171# @CODE
172# append-cxxflags $(test-flags-CXX -funky-flag)
173# @CODE
174append-cxxflags() {
175 [[ $# -eq 0 ]] && return 0
176 # Do not do automatic flag testing ourselves. #417047
177 export CXXFLAGS+=" $*"
178 return 0
179}
180
181# @FUNCTION: append-fflags
182# @USAGE: <flags>
183# @DESCRIPTION:
184# Add extra <flags> to the current {F,FC}FLAGS. If a flag might not be supported
185# with different compilers (or versions), then use test-flags-F77 like so:
186# @CODE
187# append-fflags $(test-flags-F77 -funky-flag)
188# @CODE
189append-fflags() {
190 [[ $# -eq 0 ]] && return 0
191 # Do not do automatic flag testing ourselves. #417047
192 export FFLAGS+=" $*"
193 export FCFLAGS+=" $*"
194 return 0
195}
196
197# @FUNCTION: append-lfs-flags
198# @DESCRIPTION:
199# Add flags that enable Large File Support.
178append-lfs-flags() { 200append-lfs-flags() {
179 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 201 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
202 # see comments in filter-lfs-flags func for meaning of these
180 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 203 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
181} 204}
182 205
206# @FUNCTION: append-ldflags
207# @USAGE: <flags>
208# @DESCRIPTION:
209# Add extra <flags> to the current LDFLAGS.
210append-ldflags() {
211 [[ $# -eq 0 ]] && return 0
212 local flag
213 for flag in "$@"; do
214 [[ ${flag} == -l* ]] && \
215 eqawarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
216 done
217
218 export LDFLAGS="${LDFLAGS} $*"
219 return 0
220}
221
222# @FUNCTION: append-flags
223# @USAGE: <flags>
224# @DESCRIPTION:
225# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
183append-flags() { 226append-flags() {
184 [[ -z $* ]] && return 0 227 [[ $# -eq 0 ]] && return 0
185 export CFLAGS="${CFLAGS} $*" 228 case " $* " in
186 export CXXFLAGS="${CXXFLAGS} $*" 229 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
230 *' '-L*|\
231 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
232 esac
233 append-cflags "$@"
234 append-cxxflags "$@"
235 append-fflags "$@"
187 return 0 236 return 0
188} 237}
189 238
239# @FUNCTION: replace-flags
240# @USAGE: <old> <new>
241# @DESCRIPTION:
242# Replace the <old> flag with <new>. Accepts shell globs for <old>.
190replace-flags() { 243replace-flags() {
191 [[ $# != 2 ]] \
192 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 244 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
193 && die "replace-flags takes 2 arguments, not $#"
194 245
195 local f fset 246 local f var new
196 declare -a new_CFLAGS new_CXXFLAGS 247 for var in $(all-flag-vars) ; do
197
198 for fset in CFLAGS CXXFLAGS; do
199 # Looping over the flags instead of using a global 248 # Looping over the flags instead of using a global
200 # substitution ensures that we're working with flag atoms. 249 # substitution ensures that we're working with flag atoms.
201 # Otherwise globs like -O* have the potential to wipe out the 250 # Otherwise globs like -O* have the potential to wipe out the
202 # list of flags. 251 # list of flags.
252 new=()
203 for f in ${!fset}; do 253 for f in ${!var} ; do
204 # Note this should work with globs like -O* 254 # Note this should work with globs like -O*
205 [[ ${f} == ${1} ]] && f=${2} 255 [[ ${f} == ${1} ]] && f=${2}
206 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 256 new+=( "${f}" )
207 done
208 eval export ${fset}=\${new_${fset}\[*]}
209 done 257 done
258 eval export ${var}=\""${new[*]}"\"
259 done
210 260
211 return 0 261 return 0
212} 262}
213 263
264# @FUNCTION: replace-cpu-flags
265# @USAGE: <old> <new>
266# @DESCRIPTION:
267# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
268# with flags that select the <new> cpu. Accepts shell globs for <old>.
214replace-cpu-flags() { 269replace-cpu-flags() {
215 local newcpu="$#" ; newcpu="${!newcpu}" 270 local newcpu="$#" ; newcpu="${!newcpu}"
216 while [ $# -gt 1 ] ; do 271 while [ $# -gt 1 ] ; do
217 # quote to make sure that no globbing is done (particularly on 272 # quote to make sure that no globbing is done (particularly on
218 # ${oldcpu}) prior to calling replace-flags 273 # ${oldcpu}) prior to calling replace-flags
223 done 278 done
224 return 0 279 return 0
225} 280}
226 281
227_is_flagq() { 282_is_flagq() {
228 local x 283 local x var
284 eval var=\""\${$1[*]}"\"
229 for x in ${!1} ; do 285 for x in ${var} ; do
230 [[ ${x} == $2 ]] && return 0 286 [[ ${x} == $2 ]] && return 0
231 done 287 done
232 return 1 288 return 1
233} 289}
234 290
291# @FUNCTION: is-flagq
292# @USAGE: <flag>
293# @DESCRIPTION:
294# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
235is-flagq() { 295is-flagq() {
236 [[ -n $2 ]] && die "Usage: is-flag <flag>" 296 [[ -n $2 ]] && die "Usage: is-flag <flag>"
237 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
238}
239 297
298 local var
299 for var in $(all-flag-vars) ; do
300 _is_flagq ${var} "$1" && return 0
301 done
302 return 1
303}
304
305# @FUNCTION: is-flag
306# @USAGE: <flag>
307# @DESCRIPTION:
308# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
240is-flag() { 309is-flag() {
241 is-flagq "$@" && echo true 310 is-flagq "$@" && echo true
242} 311}
243 312
313# @FUNCTION: is-ldflagq
314# @USAGE: <flag>
315# @DESCRIPTION:
316# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
244is-ldflagq() { 317is-ldflagq() {
245 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 318 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
246 _is_flagq LDFLAGS $1 319 _is_flagq LDFLAGS $1
247} 320}
248 321
322# @FUNCTION: is-ldflag
323# @USAGE: <flag>
324# @DESCRIPTION:
325# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
249is-ldflag() { 326is-ldflag() {
250 is-ldflagq "$@" && echo true 327 is-ldflagq "$@" && echo true
251} 328}
252 329
330# @FUNCTION: filter-mfpmath
331# @USAGE: <math types>
332# @DESCRIPTION:
333# Remove specified math types from the fpmath flag. For example, if the user
334# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
335# -mfpmath=386.
253filter-mfpmath() { 336filter-mfpmath() {
254 local orig_mfpmath new_math prune_math 337 local orig_mfpmath new_math prune_math
255 338
256 # save the original -mfpmath flag 339 # save the original -mfpmath flag
257 orig_mfpmath=$(get-flag -mfpmath) 340 orig_mfpmath=$(get-flag -mfpmath)
258 # get the value of the current -mfpmath flag 341 # get the value of the current -mfpmath flag
259 new_math=$(get-flag mfpmath) 342 new_math=$(get-flag mfpmath)
343 # convert "both" to something we can filter
344 new_math=${new_math/both/387,sse}
260 new_math=" ${new_math//,/ } " 345 new_math=" ${new_math//[,+]/ } "
261 # figure out which math values are to be removed 346 # figure out which math values are to be removed
262 prune_math="" 347 prune_math=""
263 for prune_math in "$@" ; do 348 for prune_math in "$@" ; do
264 new_math=${new_math/ ${prune_math} / } 349 new_math=${new_math/ ${prune_math} / }
265 done 350 done
276 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 361 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
277 fi 362 fi
278 return 0 363 return 0
279} 364}
280 365
366# @FUNCTION: strip-flags
367# @DESCRIPTION:
368# Strip *FLAGS of everything except known good/safe flags. This runs over all
369# flags returned by all_flag_vars().
281strip-flags() { 370strip-flags() {
282 local x y flag NEW_CFLAGS NEW_CXXFLAGS 371 local x y var
283 372
284 setup-allowed-flags 373 setup-allowed-flags
285 374
286 local NEW_CFLAGS=""
287 local NEW_CXXFLAGS=""
288
289 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
290 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
291 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
292 fi
293
294 set -f # disable pathname expansion 375 set -f # disable pathname expansion
295 376
296 for x in ${CFLAGS}; do 377 for var in $(all-flag-vars) ; do
378 local new=()
379
380 for x in ${!var} ; do
381 local flag=${x%%=*}
297 for y in ${ALLOWED_FLAGS}; do 382 for y in ${ALLOWED_FLAGS} ; do
298 flag=${x%%=*}
299 if [ "${flag%%${y}}" = "" ] ; then 383 if [[ -z ${flag%%${y}} ]] ; then
300 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 384 new+=( "${x}" )
301 break 385 break
302 fi 386 fi
303 done 387 done
304 done 388 done
305 389
306 for x in ${CXXFLAGS}; do
307 for y in ${ALLOWED_FLAGS}; do
308 flag=${x%%=*}
309 if [ "${flag%%${y}}" = "" ] ; then
310 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
311 break
312 fi
313 done
314 done
315
316 # In case we filtered out all optimization flags fallback to -O2 390 # In case we filtered out all optimization flags fallback to -O2
317 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 391 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
318 NEW_CFLAGS="${NEW_CFLAGS} -O2" 392 new+=( -O2 )
319 fi 393 fi
320 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 394
321 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 395 if [[ ${!var} != "${new[*]}" ]] ; then
396 einfo "strip-flags: ${var}: changed '${!var}' to '${new[*]}'"
322 fi 397 fi
398 eval export ${var}=\""${new[*]}"\"
399 done
323 400
324 set +f # re-enable pathname expansion 401 set +f # re-enable pathname expansion
325 402
326 export CFLAGS="${NEW_CFLAGS}"
327 export CXXFLAGS="${NEW_CXXFLAGS}"
328 return 0 403 return 0
329} 404}
330 405
331test-flag-PROG() { 406test-flag-PROG() {
332 local comp=$1 407 local comp=$1
333 local flags="$2" 408 local lang=$2
409 local flag=$3
334 410
335 [[ -z ${comp} || -z ${flags} ]] && \ 411 [[ -z ${comp} || -z ${flag} ]] && return 1
336 return 1
337 412
413 # use -c so we can test the assembler as well
338 local PROG=$(tc-get${comp}) 414 local PROG=$(tc-get${comp})
415 if ${PROG} -c -o /dev/null -x${lang} - < /dev/null > /dev/null 2>&1 ; then
339 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 416 ${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \
340 > /dev/null 2>&1 417 > /dev/null 2>&1
418 else
419 ${PROG} "${flag}" -c -o /dev/null /dev/null > /dev/null 2>&1
420 fi
341} 421}
342 422
343# Returns true if C compiler support given flag 423# @FUNCTION: test-flag-CC
424# @USAGE: <flag>
425# @DESCRIPTION:
426# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
344test-flag-CC() { test-flag-PROG "CC" "$1"; } 427test-flag-CC() { test-flag-PROG "CC" c "$1"; }
345 428
346# Returns true if C++ compiler support given flag 429# @FUNCTION: test-flag-CXX
430# @USAGE: <flag>
431# @DESCRIPTION:
432# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
347test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 433test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
434
435# @FUNCTION: test-flag-F77
436# @USAGE: <flag>
437# @DESCRIPTION:
438# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
439test-flag-F77() { test-flag-PROG "F77" f77 "$1"; }
440
441# @FUNCTION: test-flag-FC
442# @USAGE: <flag>
443# @DESCRIPTION:
444# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
445test-flag-FC() { test-flag-PROG "FC" f95 "$1"; }
348 446
349test-flags-PROG() { 447test-flags-PROG() {
350 local comp=$1 448 local comp=$1
351 local flags 449 local flags=()
352 local x 450 local x
353 451
354 shift 452 shift
355 453
356 [[ -z ${comp} ]] && return 1 454 [[ -z ${comp} ]] && return 1
357 455
358 x="" 456 for x ; do
359 for x in "$@" ; do
360 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 457 test-flag-${comp} "${x}" && flags+=( "${x}" )
361 done 458 done
362 459
363 echo "${flags}" 460 echo "${flags[*]}"
364 461
365 # Just bail if we dont have any flags 462 # Just bail if we dont have any flags
366 [[ -n ${flags} ]] 463 [[ ${#flags[@]} -gt 0 ]]
367} 464}
368 465
369# Returns (echo's) the given flags supported by the C compiler 466# @FUNCTION: test-flags-CC
467# @USAGE: <flags>
468# @DESCRIPTION:
469# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
370test-flags-CC() { test-flags-PROG "CC" "$@"; } 470test-flags-CC() { test-flags-PROG "CC" "$@"; }
371 471
372# Returns (echo's) the given flags supported by the C++ compiler 472# @FUNCTION: test-flags-CXX
473# @USAGE: <flags>
474# @DESCRIPTION:
475# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
373test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 476test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
374 477
478# @FUNCTION: test-flags-F77
479# @USAGE: <flags>
480# @DESCRIPTION:
481# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
482test-flags-F77() { test-flags-PROG "F77" "$@"; }
483
484# @FUNCTION: test-flags-FC
485# @USAGE: <flags>
486# @DESCRIPTION:
487# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
488test-flags-FC() { test-flags-PROG "FC" "$@"; }
489
490# @FUNCTION: test-flags
491# @USAGE: <flags>
492# @DESCRIPTION:
375# Short-hand that should hopefully work for both C and C++ compiler, but 493# Short-hand that should hopefully work for both C and C++ compiler, but
376# its really only present due to the append-flags() abomination. 494# its really only present due to the append-flags() abomination.
377test-flags() { test-flags-CC "$@"; } 495test-flags() { test-flags-CC "$@"; }
378 496
379# Depriciated, use test-flags() 497# @FUNCTION: test_version_info
380test_flag() { 498# @USAGE: <version>
381 ewarn "test_flag: deprecated, please use test-flags()!" >&2 499# @DESCRIPTION:
382 500# Returns shell true if the current C compiler version matches <version>, else returns shell false.
383 test-flags-CC "$@" 501# Accepts shell globs.
384}
385
386test_version_info() { 502test_version_info() {
387 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 503 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
388 return 0 504 return 0
389 else 505 else
390 return 1 506 return 1
391 fi 507 fi
392} 508}
393 509
510# @FUNCTION: strip-unsupported-flags
511# @DESCRIPTION:
512# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
394strip-unsupported-flags() { 513strip-unsupported-flags() {
395 export CFLAGS=$(test-flags-CC ${CFLAGS}) 514 export CFLAGS=$(test-flags-CC ${CFLAGS})
396 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 515 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
516 export FFLAGS=$(test-flags-F77 ${FFLAGS})
517 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
397} 518}
398 519
520# @FUNCTION: get-flag
521# @USAGE: <flag>
522# @DESCRIPTION:
523# Find and echo the value for a particular flag. Accepts shell globs.
399get-flag() { 524get-flag() {
400 local f findflag="$1" 525 local f var findflag="$1"
401 526
402 # this code looks a little flaky but seems to work for 527 # this code looks a little flaky but seems to work for
403 # everything we want ... 528 # everything we want ...
404 # for example, if CFLAGS="-march=i686": 529 # for example, if CFLAGS="-march=i686":
405 # `get-flag -march` == "-march=i686" 530 # `get-flag -march` == "-march=i686"
406 # `get-flag march` == "i686" 531 # `get-flag march` == "i686"
407 for f in ${CFLAGS} ${CXXFLAGS} ; do 532 for var in $(all-flag-vars) ; do
533 for f in ${!var} ; do
408 if [ "${f/${findflag}}" != "${f}" ] ; then 534 if [ "${f/${findflag}}" != "${f}" ] ; then
409 printf "%s\n" "${f/-${findflag}=}" 535 printf "%s\n" "${f/-${findflag}=}"
410 return 0 536 return 0
411 fi 537 fi
538 done
412 done 539 done
413 return 1 540 return 1
414} 541}
415 542
416# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 543# @FUNCTION: has_m64
417has_hardened() { 544# @DESCRIPTION:
418 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 545# This doesn't test if the flag is accepted, it tests if the flag actually
419 546# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
420 test_version_info Hardened && return 0 547# return code is 0, else the return code is 1.
421 # The specs file wont exist unless gcc has GCC_SPECS support
422 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
423}
424
425# DEPRECATED - use gcc-specs-pie from toolchain-funcs
426# indicate whether PIC is set
427has_pic() {
428 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
429
430 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
431 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
432 gcc-specs-pie
433}
434
435# DEPRECATED - use gcc-specs-pie from toolchain-funcs
436# indicate whether PIE is set
437has_pie() {
438 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
439
440 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
441 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
442 gcc-specs-pie
443}
444
445# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
446# indicate whether code for SSP is being generated for all functions
447has_ssp_all() {
448 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
449
450 # note; this matches only -fstack-protector-all
451 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
452 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
453 gcc-specs-ssp-all
454}
455
456# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
457# indicate whether code for SSP is being generated
458has_ssp() {
459 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
460
461 # note; this matches both -fstack-protector and -fstack-protector-all
462 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
463 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
464 gcc-specs-ssp
465}
466
467has_m64() { 548has_m64() {
549 eqawarn "${FUNCNAME}: don't use this anymore"
550
468 # this doesnt test if the flag is accepted, it tests if the flag 551 # this doesnt test if the flag is accepted, it tests if the flag
469 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 552 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
470 # please dont replace this function with test_flag in some future 553 # please dont replace this function with test_flag in some future
471 # clean-up! 554 # clean-up!
472 555
479 [[ ${ret} != 1 ]] && return 0 562 [[ ${ret} != 1 ]] && return 0
480 return 1 563 return 1
481} 564}
482 565
483has_m32() { 566has_m32() {
484 # this doesnt test if the flag is accepted, it tests if the flag 567 die "${FUNCNAME}: don't use this anymore"
485 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
486 # please dont replace this function with test_flag in some future
487 # clean-up!
488
489 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
490
491 local temp=$(emktemp)
492 echo "int main() { return(0); }" > "${temp}".c
493 MY_CC=$(tc-getCC)
494 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
495 local ret=$?
496 rm -f "${temp}".c
497 [[ ${ret} != 1 ]] && return 0
498 return 1
499} 568}
500 569
570# @FUNCTION: replace-sparc64-flags
571# @DESCRIPTION:
572# Sets mcpu to v8 and uses the original value as mtune if none specified.
501replace-sparc64-flags() { 573replace-sparc64-flags() {
502 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 574 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
503 575
504 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 576 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
505 for x in ${SPARC64_CPUS}; do 577 for x in ${SPARC64_CPUS}; do
522 fi 594 fi
523 595
524 export CFLAGS CXXFLAGS 596 export CFLAGS CXXFLAGS
525} 597}
526 598
599# @FUNCTION: append-libs
600# @USAGE: <libs>
601# @DESCRIPTION:
602# Add extra <libs> to the current LIBS.
527append-ldflags() { 603append-libs() {
528 [[ -z $* ]] && return 0 604 [[ $# -eq 0 ]] && return 0
529 export LDFLAGS="${LDFLAGS} $*" 605 local flag
530 return 0 606 for flag in "$@"; do
531} 607 [[ ${flag} == -l* ]] && flag=${flag#-l}
608 export LIBS="${LIBS} -l${flag}"
609 done
532 610
533# Remove flags from LDFLAGS - it's up to the ebuild to filter
534# CFLAGS and CXXFLAGS via filter-flags if they need to.
535filter-ldflags() {
536 _filter-var LDFLAGS "$@"
537 return 0 611 return 0
538} 612}
539 613
614# @FUNCTION: raw-ldflags
615# @USAGE: [flags]
616# @DESCRIPTION:
540# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 617# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
541# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 618# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
542# to gcc where it needs the '-Wl,'. 619# to gcc where it needs the '-Wl,'.
620#
621# If no flags are specified, then default to ${LDFLAGS}.
543raw-ldflags() { 622raw-ldflags() {
544 local x input="$@" 623 local x input="$@"
545 [[ -z ${input} ]] && input=${LDFLAGS} 624 [[ -z ${input} ]] && input=${LDFLAGS}
546 set -- 625 set --
547 for x in ${input} ; do 626 for x in ${input} ; do
627 case ${x} in
628 -Wl,*)
548 x=${x#-Wl,} 629 x=${x#-Wl,}
549 set -- "$@" ${x//,/ } 630 set -- "$@" ${x//,/ }
631 ;;
632 *) # Assume it's a compiler driver flag, so throw it away #441808
633 ;;
634 esac
550 done 635 done
551 echo "$@" 636 echo "$@"
552} 637}
553 638
554# Gets the flags needed for "NOW" binding 639# @FUNCTION: no-as-needed
555bindnow-flags() { 640# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
641no-as-needed() {
556 case $($(tc-getLD) -v 2>&1 </dev/null) in 642 case $($(tc-getLD) -v 2>&1 </dev/null) in
557 *GNU* | *'with BFD'*) # GNU ld 643 *GNU*) # GNU ld
558 echo "-Wl,-z,now" ;; 644 echo "-Wl,--no-as-needed" ;;
559 *Apple*) # Darwin ld
560 echo "-bind_at_load" ;;
561 *)
562 # Some linkers just recognize -V instead of -v
563 case $($(tc-getLD) -V 2>&1 </dev/null) in
564 *Solaris*) # Solaris accept almost the same GNU options
565 echo "-Wl,-z,now" ;;
566 esac
567 ;;
568 esac 645 esac
569} 646}
570 647
571 648fi
572# Some tests for when we screw with things and want to make
573# sure we didn't break anything
574#TESTS() {
575# CFLAGS="-a -b -c=1"
576# CXXFLAGS="-x -y -z=2"
577# LDFLAGS="-l -m -n=3"
578#
579# die() { exit 1; }
580# (is-flag 1 2 3) && die
581# (is-ldflag 1 2 3) && die
582#
583# is-flagq -l && die
584# is-ldflagq -a && die
585# is-flagq -a || die
586# is-flagq -x || die
587# is-ldflagq -n=* || die
588# is-ldflagq -n && die
589#
590# strip-unsupported-flags
591# [[ ${CFLAGS} == "-c=1" ]] || die
592# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
593#
594# echo "All tests pass"
595#}
596#TESTS

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