/[gentoo-x86]/eclass/flag-o-matic.eclass
Gentoo

Diff of /eclass/flag-o-matic.eclass

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 1.118 Revision 1.201
1# Copyright 1999-2007 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 1.118 2007/03/24 07:07:18 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.201 2014/07/11 08:21:58 ulm Exp $
4# 4
5# @ECLASS: flag-o-matic.eclass
6# @MAINTAINER:
5# Maintainer: toolchain@gentoo.org 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.
6 12
7# need access to emktemp() 13if [[ -z ${_FLAG_O_MATIC_ECLASS} ]]; then
14_FLAG_O_MATIC_ECLASS=1
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
95# Note: shell globs and character lists are allowed 24# Note: shell globs and character lists are allowed
96setup-allowed-flags() { 25setup-allowed-flags() {
97 if [[ -z ${ALLOWED_FLAGS} ]] ; then
98 export ALLOWED_FLAGS="-pipe" 26 ALLOWED_FLAGS="-pipe"
99 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 27 ALLOWED_FLAGS+=" -O -O1 -O2 -Os -Og -mcpu -march -mtune"
100 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 28 ALLOWED_FLAGS+=" -fstack-protector*"
101 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 29 ALLOWED_FLAGS+=" -fbounds-checking -fno-strict-overflow"
102 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time" 30 ALLOWED_FLAGS+=" -fno-PIE -fno-pie -fno-unit-at-a-time"
103 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+" 31 ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gdwarf-* gstabs -gstabs+"
104 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident" 32 ALLOWED_FLAGS+=" -fno-ident -fpermissive -frecord-gcc-switches"
105 fi 33 ALLOWED_FLAGS+=" -fdiagnostics*"
34 ALLOWED_FLAGS+=" -W* -w"
35
106 # allow a bunch of flags that negate features / control ABI 36 # allow a bunch of flags that negate features / control ABI
107 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 37 ALLOWED_FLAGS+=" -fno-stack-protector* -fabi-version=* \
38 -fno-strict-aliasing -fno-bounds-checking -fstrict-overflow \
39 -fno-omit-frame-pointer -fno-builtin*"
108 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 40 ALLOWED_FLAGS+=" -mregparm -mno-app-regs -mapp-regs -mno-mmx -mno-sse \
109 -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 \
110 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 43 -mno-abm -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 -mplt \
111 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 44 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
112 -mieee -mieee-with-inexact -mschedule \ 45 -mieee -mieee-with-inexact -mschedule -mfloat-gprs -mspe -mno-spe \
113 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \ 46 -mtls-direct-seg-refs -mno-tls-direct-seg-refs -mflat -mno-flat \
114 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 47 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi \
115 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 48 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel \
116 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \ 49 -mstack-bias -mno-stack-bias -msecure-plt -m*-toc -mfloat-abi \
117 -msecure-plt -D*" 50 -D* -U*"
118 51
119 # C[XX]FLAGS that we are think is ok, but needs testing 52 # 4.5
120 # NOTE: currently -Os have issues with gcc3 and K6* arch's 53 ALLOWED_FLAGS+=" -mno-fma4 -mno-movbe -mno-xop -mno-lwp"
121 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks" 54 # 4.6
55 ALLOWED_FLAGS+=" -mno-fsgsbase -mno-rdrnd -mno-f16c -mno-bmi -mno-tbm"
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"
62
63 # CPPFLAGS and LDFLAGS
64 ALLOWED_FLAGS+=" -I* -L* -R* -Wl,*"
65
66 export ALLOWED_FLAGS
122 return 0 67 return 0
123} 68}
124 69
125# inverted filters for hardened compiler. This is trying to unpick 70# inverted filters for hardened compiler. This is trying to unpick
126# the hardened compiler defaults. 71# the hardened compiler defaults.
134 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie) 79 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
135 gcc-specs-pie || continue 80 gcc-specs-pie || continue
136 is-flagq -nopie || append-flags -nopie;; 81 is-flagq -nopie || append-flags -nopie;;
137 -fstack-protector) 82 -fstack-protector)
138 gcc-specs-ssp || continue 83 gcc-specs-ssp || continue
139 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;; 84 is-flagq -fno-stack-protector || append-flags $(test-flags -fno-stack-protector);;
140 -fstack-protector-all) 85 -fstack-protector-all)
141 gcc-specs-ssp-to-all || continue 86 gcc-specs-ssp-to-all || continue
142 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;; 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);;
143 esac 91 esac
144 done 92 done
145} 93}
146 94
147# Remove occurrences of strings from variable given in $1 95# Remove occurrences of strings from variable given in $1
148# Strings removed are matched as globs, so for example 96# Strings removed are matched as globs, so for example
149# '-O*' would remove -O1, -O2 etc. 97# '-O*' would remove -O1, -O2 etc.
150_filter-var() { 98_filter-var() {
151 local f x VAR VAL 99 local f x var=$1 new=()
152 declare -a new
153
154 VAR=$1
155 shift 100 shift
156 eval VAL=\${${VAR}} 101
157 for f in ${VAL}; do 102 for f in ${!var} ; do
158 for x in "$@"; do 103 for x in "$@" ; do
159 # Note this should work with globs like -O* 104 # Note this should work with globs like -O*
160 [[ ${f} == ${x} ]] && continue 2 105 [[ ${f} == ${x} ]] && continue 2
161 done 106 done
162 eval new\[\${\#new\[@]}]=\${f} 107 new+=( "${f}" )
163 done 108 done
164 eval export ${VAR}=\${new\[*]} 109 eval export ${var}=\""${new[*]}"\"
165} 110}
166 111
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.
167filter-flags() { 116filter-flags() {
168 _filter-hardened "$@" 117 _filter-hardened "$@"
118 local v
119 for v in $(all-flag-vars) ; do
169 _filter-var CFLAGS "$@" 120 _filter-var ${v} "$@"
170 _filter-var CPPFLAGS "$@" 121 done
171 _filter-var CXXFLAGS "$@"
172 return 0 122 return 0
173} 123}
174 124
125# @FUNCTION: filter-lfs-flags
126# @DESCRIPTION:
127# Remove flags that enable Large File Support.
175filter-lfs-flags() { 128filter-lfs-flags() {
176 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments" 129 [[ $# -ne 0 ]] && die "filter-lfs-flags takes no arguments"
130 # http://www.gnu.org/s/libc/manual/html_node/Feature-Test-Macros.html
131 # _LARGEFILE_SOURCE: enable support for new LFS funcs (ftello/etc...)
132 # _LARGEFILE64_SOURCE: enable support for 64bit variants (off64_t/fseeko64/etc...)
133 # _FILE_OFFSET_BITS: default to 64bit variants (off_t is defined as off64_t)
177 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
178} 135}
179 136
137# @FUNCTION: filter-ldflags
138# @USAGE: <flags>
139# @DESCRIPTION:
140# Remove particular <flags> from LDFLAGS. Accepts shell globs.
141filter-ldflags() {
142 _filter-var LDFLAGS "$@"
143 return 0
144}
145
146# @FUNCTION: append-cppflags
147# @USAGE: <flags>
148# @DESCRIPTION:
149# Add extra <flags> to the current CPPFLAGS.
180append-cppflags() { 150append-cppflags() {
181 [[ -z $* ]] && return 0 151 [[ $# -eq 0 ]] && return 0
182 export CPPFLAGS="${CPPFLAGS} $*" 152 export CPPFLAGS+=" $*"
183 return 0 153 return 0
184} 154}
185 155
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.
186append-lfs-flags() { 205append-lfs-flags() {
187 [[ -n $@ ]] && die "append-lfs-flags takes no arguments" 206 [[ $# -ne 0 ]] && die "append-lfs-flags takes no arguments"
207 # see comments in filter-lfs-flags func for meaning of these
188 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 208 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
189} 209}
190 210
211# @FUNCTION: append-ldflags
212# @USAGE: <flags>
213# @DESCRIPTION:
214# Add extra <flags> to the current LDFLAGS.
215append-ldflags() {
216 [[ $# -eq 0 ]] && return 0
217 local flag
218 for flag in "$@"; 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.
191append-flags() { 231append-flags() {
192 [[ -z $* ]] && return 0 232 [[ $# -eq 0 ]] && return 0
193 export CFLAGS="${CFLAGS} $*" 233 case " $* " in
194 export CXXFLAGS="${CXXFLAGS} $*" 234 *' '-[DIU]*) eqawarn 'please use append-cppflags for preprocessor flags' ;;
235 *' '-L*|\
236 *' '-Wl,*) eqawarn 'please use append-ldflags for linker flags' ;;
237 esac
238 append-cflags "$@"
239 append-cxxflags "$@"
240 append-fflags "$@"
195 return 0 241 return 0
196} 242}
197 243
244# @FUNCTION: replace-flags
245# @USAGE: <old> <new>
246# @DESCRIPTION:
247# Replace the <old> flag with <new>. Accepts shell globs for <old>.
198replace-flags() { 248replace-flags() {
199 [[ $# != 2 ]] \
200 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \ 249 [[ $# != 2 ]] && die "Usage: replace-flags <old flag> <new flag>"
201 && die "replace-flags takes 2 arguments, not $#"
202 250
203 local f fset 251 local f var new
204 declare -a new_CFLAGS new_CXXFLAGS 252 for var in $(all-flag-vars) ; do
205
206 for fset in CFLAGS CXXFLAGS; do
207 # Looping over the flags instead of using a global 253 # Looping over the flags instead of using a global
208 # substitution ensures that we're working with flag atoms. 254 # substitution ensures that we're working with flag atoms.
209 # Otherwise globs like -O* have the potential to wipe out the 255 # Otherwise globs like -O* have the potential to wipe out the
210 # list of flags. 256 # list of flags.
257 new=()
211 for f in ${!fset}; do 258 for f in ${!var} ; do
212 # Note this should work with globs like -O* 259 # Note this should work with globs like -O*
213 [[ ${f} == ${1} ]] && f=${2} 260 [[ ${f} == ${1} ]] && f=${2}
214 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f} 261 new+=( "${f}" )
215 done
216 eval export ${fset}=\${new_${fset}\[*]}
217 done 262 done
263 eval export ${var}=\""${new[*]}"\"
264 done
218 265
219 return 0 266 return 0
220} 267}
221 268
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>.
222replace-cpu-flags() { 274replace-cpu-flags() {
223 local newcpu="$#" ; newcpu="${!newcpu}" 275 local newcpu="$#" ; newcpu="${!newcpu}"
224 while [ $# -gt 1 ] ; do 276 while [ $# -gt 1 ] ; do
225 # quote to make sure that no globbing is done (particularly on 277 # quote to make sure that no globbing is done (particularly on
226 # ${oldcpu}) prior to calling replace-flags 278 # ${oldcpu}) prior to calling replace-flags
231 done 283 done
232 return 0 284 return 0
233} 285}
234 286
235_is_flagq() { 287_is_flagq() {
236 local x 288 local x var
289 eval var=\""\${$1[*]}"\"
237 for x in ${!1} ; do 290 for x in ${var} ; do
238 [[ ${x} == $2 ]] && return 0 291 [[ ${x} == $2 ]] && return 0
239 done 292 done
240 return 1 293 return 1
241} 294}
242 295
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.
243is-flagq() { 300is-flagq() {
244 [[ -n $2 ]] && die "Usage: is-flag <flag>" 301 [[ -n $2 ]] && die "Usage: is-flag <flag>"
245 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1
246}
247 302
303 local var
304 for var in $(all-flag-vars) ; do
305 _is_flagq ${var} "$1" && return 0
306 done
307 return 1
308}
309
310# @FUNCTION: is-flag
311# @USAGE: <flag>
312# @DESCRIPTION:
313# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
248is-flag() { 314is-flag() {
249 is-flagq "$@" && echo true 315 is-flagq "$@" && echo true
250} 316}
251 317
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.
252is-ldflagq() { 322is-ldflagq() {
253 [[ -n $2 ]] && die "Usage: is-ldflag <flag>" 323 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
254 _is_flagq LDFLAGS $1 324 _is_flagq LDFLAGS $1
255} 325}
256 326
327# @FUNCTION: is-ldflag
328# @USAGE: <flag>
329# @DESCRIPTION:
330# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
257is-ldflag() { 331is-ldflag() {
258 is-ldflagq "$@" && echo true 332 is-ldflagq "$@" && echo true
259} 333}
260 334
335# @FUNCTION: filter-mfpmath
336# @USAGE: <math types>
337# @DESCRIPTION:
338# Remove specified math types from the fpmath flag. For example, if the user
339# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
340# -mfpmath=386.
261filter-mfpmath() { 341filter-mfpmath() {
262 local orig_mfpmath new_math prune_math 342 local orig_mfpmath new_math prune_math
263 343
264 # save the original -mfpmath flag 344 # save the original -mfpmath flag
265 orig_mfpmath=$(get-flag -mfpmath) 345 orig_mfpmath=$(get-flag -mfpmath)
266 # get the value of the current -mfpmath flag 346 # get the value of the current -mfpmath flag
267 new_math=$(get-flag mfpmath) 347 new_math=$(get-flag mfpmath)
348 # convert "both" to something we can filter
349 new_math=${new_math/both/387,sse}
268 new_math=" ${new_math//,/ } " 350 new_math=" ${new_math//[,+]/ } "
269 # figure out which math values are to be removed 351 # figure out which math values are to be removed
270 prune_math="" 352 prune_math=""
271 for prune_math in "$@" ; do 353 for prune_math in "$@" ; do
272 new_math=${new_math/ ${prune_math} / } 354 new_math=${new_math/ ${prune_math} / }
273 done 355 done
284 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 366 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
285 fi 367 fi
286 return 0 368 return 0
287} 369}
288 370
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().
289strip-flags() { 375strip-flags() {
290 local x y flag NEW_CFLAGS NEW_CXXFLAGS 376 local x y var
291 377
292 setup-allowed-flags 378 setup-allowed-flags
293 379
294 local NEW_CFLAGS=""
295 local NEW_CXXFLAGS=""
296
297 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
298 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
299 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
300 fi
301
302 set -f # disable pathname expansion 380 set -f # disable pathname expansion
303 381
304 for x in ${CFLAGS}; do 382 for var in $(all-flag-vars) ; do
383 local new=()
384
385 for x in ${!var} ; do
386 local flag=${x%%=*}
305 for y in ${ALLOWED_FLAGS}; do 387 for y in ${ALLOWED_FLAGS} ; do
306 flag=${x%%=*}
307 if [ "${flag%%${y}}" = "" ] ; then 388 if [[ -z ${flag%%${y}} ]] ; then
308 NEW_CFLAGS="${NEW_CFLAGS} ${x}" 389 new+=( "${x}" )
309 break 390 break
310 fi 391 fi
311 done 392 done
312 done 393 done
313 394
314 for x in ${CXXFLAGS}; do
315 for y in ${ALLOWED_FLAGS}; do
316 flag=${x%%=*}
317 if [ "${flag%%${y}}" = "" ] ; then
318 NEW_CXXFLAGS="${NEW_CXXFLAGS} ${x}"
319 break
320 fi
321 done
322 done
323
324 # In case we filtered out all optimization flags fallback to -O2 395 # In case we filtered out all optimization flags fallback to -O2
325 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 396 if _is_flagq ${var} "-O*" && ! _is_flagq new "-O*" ; then
326 NEW_CFLAGS="${NEW_CFLAGS} -O2" 397 new+=( -O2 )
327 fi 398 fi
328 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 399
329 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 400 if [[ ${!var} != "${new[*]}" ]] ; then
401 einfo "strip-flags: ${var}: changed '${!var}' to '${new[*]}'"
330 fi 402 fi
403 eval export ${var}=\""${new[*]}"\"
404 done
331 405
332 set +f # re-enable pathname expansion 406 set +f # re-enable pathname expansion
333 407
334 export CFLAGS="${NEW_CFLAGS}"
335 export CXXFLAGS="${NEW_CXXFLAGS}"
336 return 0 408 return 0
337} 409}
338 410
339test-flag-PROG() { 411test-flag-PROG() {
340 local comp=$1 412 local comp=$1
341 local flags="$2" 413 local lang=$2
414 local flag=$3
342 415
343 [[ -z ${comp} || -z ${flags} ]] && \ 416 [[ -z ${comp} || -z ${flag} ]] && return 1
344 return 1
345 417
418 # use -c so we can test the assembler as well
346 local PROG=$(tc-get${comp}) 419 local PROG=$(tc-get${comp})
420 if ${PROG} -c -o /dev/null -x${lang} - < /dev/null > /dev/null 2>&1 ; then
347 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \ 421 ${PROG} "${flag}" -c -o /dev/null -x${lang} - < /dev/null \
348 > /dev/null 2>&1 422 > /dev/null 2>&1
423 else
424 ${PROG} "${flag}" -c -o /dev/null /dev/null > /dev/null 2>&1
425 fi
349} 426}
350 427
351# Returns true if C compiler support given flag 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.
352test-flag-CC() { test-flag-PROG "CC" "$1"; } 432test-flag-CC() { test-flag-PROG "CC" c "$1"; }
353 433
354# Returns true if C++ compiler support given flag 434# @FUNCTION: test-flag-CXX
435# @USAGE: <flag>
436# @DESCRIPTION:
437# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
355test-flag-CXX() { test-flag-PROG "CXX" "$1"; } 438test-flag-CXX() { test-flag-PROG "CXX" c++ "$1"; }
439
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"; }
356 451
357test-flags-PROG() { 452test-flags-PROG() {
358 local comp=$1 453 local comp=$1
359 local flags 454 local flags=()
360 local x 455 local x
361 456
362 shift 457 shift
363 458
364 [[ -z ${comp} ]] && return 1 459 [[ -z ${comp} ]] && return 1
365 460
366 x="" 461 for x ; do
367 for x in "$@" ; do
368 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}" 462 test-flag-${comp} "${x}" && flags+=( "${x}" )
369 done 463 done
370 464
371 echo "${flags}" 465 echo "${flags[*]}"
372 466
373 # Just bail if we dont have any flags 467 # Just bail if we dont have any flags
374 [[ -n ${flags} ]] 468 [[ ${#flags[@]} -gt 0 ]]
375} 469}
376 470
377# Returns (echo's) the given flags supported by the C compiler 471# @FUNCTION: test-flags-CC
472# @USAGE: <flags>
473# @DESCRIPTION:
474# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
378test-flags-CC() { test-flags-PROG "CC" "$@"; } 475test-flags-CC() { test-flags-PROG "CC" "$@"; }
379 476
380# Returns (echo's) the given flags supported by the C++ compiler 477# @FUNCTION: test-flags-CXX
478# @USAGE: <flags>
479# @DESCRIPTION:
480# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
381test-flags-CXX() { test-flags-PROG "CXX" "$@"; } 481test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
382 482
483# @FUNCTION: test-flags-F77
484# @USAGE: <flags>
485# @DESCRIPTION:
486# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
487test-flags-F77() { test-flags-PROG "F77" "$@"; }
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" "$@"; }
494
495# @FUNCTION: test-flags
496# @USAGE: <flags>
497# @DESCRIPTION:
383# Short-hand that should hopefully work for both C and C++ compiler, but 498# Short-hand that should hopefully work for both C and C++ compiler, but
384# its really only present due to the append-flags() abomination. 499# its really only present due to the append-flags() abomination.
385test-flags() { test-flags-CC "$@"; } 500test-flags() { test-flags-CC "$@"; }
386 501
387# Depriciated, use test-flags() 502# @FUNCTION: test_version_info
388test_flag() { 503# @USAGE: <version>
389 ewarn "test_flag: deprecated, please use test-flags()!" >&2 504# @DESCRIPTION:
390 505# Returns shell true if the current C compiler version matches <version>, else returns shell false.
391 test-flags-CC "$@" 506# Accepts shell globs.
392}
393
394test_version_info() { 507test_version_info() {
395 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 508 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
396 return 0 509 return 0
397 else 510 else
398 return 1 511 return 1
399 fi 512 fi
400} 513}
401 514
515# @FUNCTION: strip-unsupported-flags
516# @DESCRIPTION:
517# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
402strip-unsupported-flags() { 518strip-unsupported-flags() {
403 export CFLAGS=$(test-flags-CC ${CFLAGS}) 519 export CFLAGS=$(test-flags-CC ${CFLAGS})
404 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS}) 520 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
521 export FFLAGS=$(test-flags-F77 ${FFLAGS})
522 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
405} 523}
406 524
525# @FUNCTION: get-flag
526# @USAGE: <flag>
527# @DESCRIPTION:
528# Find and echo the value for a particular flag. Accepts shell globs.
407get-flag() { 529get-flag() {
408 local f findflag="$1" 530 local f var findflag="$1"
409 531
410 # this code looks a little flaky but seems to work for 532 # this code looks a little flaky but seems to work for
411 # everything we want ... 533 # everything we want ...
412 # for example, if CFLAGS="-march=i686": 534 # for example, if CFLAGS="-march=i686":
413 # `get-flag -march` == "-march=i686" 535 # `get-flag -march` == "-march=i686"
414 # `get-flag march` == "i686" 536 # `get-flag march` == "i686"
415 for f in ${CFLAGS} ${CXXFLAGS} ; do 537 for var in $(all-flag-vars) ; do
538 for f in ${!var} ; do
416 if [ "${f/${findflag}}" != "${f}" ] ; then 539 if [ "${f/${findflag}}" != "${f}" ] ; then
417 printf "%s\n" "${f/-${findflag}=}" 540 printf "%s\n" "${f/-${findflag}=}"
418 return 0 541 return 0
419 fi 542 fi
543 done
420 done 544 done
421 return 1 545 return 1
422} 546}
423 547
424# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs 548# @FUNCTION: has_m64
425has_hardened() { 549# @DESCRIPTION:
426 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2 550# This doesn't test if the flag is accepted, it tests if the flag actually
427 551# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
428 test_version_info Hardened && return 0 552# return code is 0, else the return code is 1.
429 # The specs file wont exist unless gcc has GCC_SPECS support
430 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
431}
432
433# DEPRECATED - use gcc-specs-pie from toolchain-funcs
434# indicate whether PIC is set
435has_pic() {
436 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
437
438 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
439 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
440 gcc-specs-pie
441}
442
443# DEPRECATED - use gcc-specs-pie from toolchain-funcs
444# indicate whether PIE is set
445has_pie() {
446 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
447
448 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
449 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
450 gcc-specs-pie
451}
452
453# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
454# indicate whether code for SSP is being generated for all functions
455has_ssp_all() {
456 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
457
458 # note; this matches only -fstack-protector-all
459 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
460 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
461 gcc-specs-ssp-all
462}
463
464# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
465# indicate whether code for SSP is being generated
466has_ssp() {
467 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
468
469 # note; this matches both -fstack-protector and -fstack-protector-all
470 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
471 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
472 gcc-specs-ssp
473}
474
475has_m64() { 553has_m64() {
554 eqawarn "${FUNCNAME}: don't use this anymore"
555
476 # 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
477 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 557 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
478 # please dont replace this function with test_flag in some future 558 # please dont replace this function with test_flag in some future
479 # clean-up! 559 # clean-up!
480 560
487 [[ ${ret} != 1 ]] && return 0 567 [[ ${ret} != 1 ]] && return 0
488 return 1 568 return 1
489} 569}
490 570
491has_m32() { 571has_m32() {
492 # this doesnt test if the flag is accepted, it tests if the flag 572 die "${FUNCNAME}: don't use this anymore"
493 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
494 # please dont replace this function with test_flag in some future
495 # clean-up!
496
497 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
498
499 local temp=$(emktemp)
500 echo "int main() { return(0); }" > "${temp}".c
501 MY_CC=$(tc-getCC)
502 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
503 local ret=$?
504 rm -f "${temp}".c
505 [[ ${ret} != 1 ]] && return 0
506 return 1
507} 573}
508 574
575# @FUNCTION: replace-sparc64-flags
576# @DESCRIPTION:
577# Sets mcpu to v8 and uses the original value as mtune if none specified.
509replace-sparc64-flags() { 578replace-sparc64-flags() {
510 local SPARC64_CPUS="ultrasparc3 ultrasparc v9" 579 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
511 580
512 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 581 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
513 for x in ${SPARC64_CPUS}; do 582 for x in ${SPARC64_CPUS}; do
530 fi 599 fi
531 600
532 export CFLAGS CXXFLAGS 601 export CFLAGS CXXFLAGS
533} 602}
534 603
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.
535append-ldflags() { 610append-libs() {
536 [[ -z $* ]] && return 0 611 [[ $# -eq 0 ]] && return 0
537 export LDFLAGS="${LDFLAGS} $*" 612 local flag
538 return 0 613 for flag in "$@"; do
539} 614 if [[ -z "${flag// }" ]]; then
615 eqawarn "Appending an empty argument to LIBS is invalid! Skipping."
616 continue
617 fi
618 case $flag in
619 -[lL]*)
620 export LIBS="${LIBS} ${flag}"
621 ;;
622 -*)
623 eqawarn "Appending non-library to LIBS (${flag}); Other linker flags should be passed via LDFLAGS"
624 export LIBS="${LIBS} ${flag}"
625 ;;
626 *)
627 export LIBS="${LIBS} -l${flag}"
628 esac
629 done
540 630
541# Remove flags from LDFLAGS - it's up to the ebuild to filter
542# CFLAGS and CXXFLAGS via filter-flags if they need to.
543filter-ldflags() {
544 _filter-var LDFLAGS "$@"
545 return 0 631 return 0
546} 632}
547 633
634# @FUNCTION: raw-ldflags
635# @USAGE: [flags]
636# @DESCRIPTION:
548# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results 637# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
549# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed 638# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
550# to gcc where it needs the '-Wl,'. 639# to gcc where it needs the '-Wl,'.
640#
641# If no flags are specified, then default to ${LDFLAGS}.
551raw-ldflags() { 642raw-ldflags() {
552 local x input="$@" 643 local x input="$@"
553 [[ -z ${input} ]] && input=${LDFLAGS} 644 [[ -z ${input} ]] && input=${LDFLAGS}
554 set -- 645 set --
555 for x in ${input} ; do 646 for x in ${input} ; do
647 case ${x} in
648 -Wl,*)
556 x=${x#-Wl,} 649 x=${x#-Wl,}
557 set -- "$@" ${x//,/ } 650 set -- "$@" ${x//,/ }
651 ;;
652 *) # Assume it's a compiler driver flag, so throw it away #441808
653 ;;
654 esac
558 done 655 done
559 echo "$@" 656 echo "$@"
560} 657}
561 658
562# Gets the flags needed for "NOW" binding 659# @FUNCTION: no-as-needed
563bindnow-flags() { 660# @RETURN: Flag to disable asneeded behavior for use with append-ldflags.
661no-as-needed() {
564 case $($(tc-getLD) -v 2>&1 </dev/null) in 662 case $($(tc-getLD) -v 2>&1 </dev/null) in
565 *GNU* | *'with BFD'*) # GNU ld 663 *GNU*) # GNU ld
566 echo "-Wl,-z,now" ;; 664 echo "-Wl,--no-as-needed" ;;
567 *Apple*) # Darwin ld
568 echo "-bind_at_load" ;;
569 *)
570 # Some linkers just recognize -V instead of -v
571 case $($(tc-getLD) -V 2>&1 </dev/null) in
572 *Solaris*) # Solaris accept almost the same GNU options
573 echo "-Wl,-z,now" ;;
574 esac
575 ;;
576 esac 665 esac
577} 666}
578 667
579 668fi
580# Some tests for when we screw with things and want to make
581# sure we didn't break anything
582#TESTS() {
583# CFLAGS="-a -b -c=1"
584# CXXFLAGS="-x -y -z=2"
585# LDFLAGS="-l -m -n=3"
586#
587# die() { exit 1; }
588# (is-flag 1 2 3) && die
589# (is-ldflag 1 2 3) && die
590#
591# is-flagq -l && die
592# is-ldflagq -a && die
593# is-flagq -a || die
594# is-flagq -x || die
595# is-ldflagq -n=* || die
596# is-ldflagq -n && die
597#
598# strip-unsupported-flags
599# [[ ${CFLAGS} == "-c=1" ]] || die
600# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
601#
602# echo "All tests pass"
603#}
604#TESTS

Legend:
Removed from v.1.118  
changed lines
  Added in v.1.201

  ViewVC Help
Powered by ViewVC 1.1.20