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1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2008 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 1.88 2005/07/06 20:20:03 agriffis Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/flag-o-matic.eclass,v 1.124 2008/07/03 05:30:54 dberkholz Exp $
4 4
5INHERITED="$INHERITED $ECLASS" 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.
6 12
7# need access to emktemp()
8inherit eutils toolchain-funcs multilib 13inherit eutils toolchain-funcs multilib
9 14
15################ DEPRECATED functions ################
16# The following are still present to avoid breaking existing
17# code more than necessary; however they are deprecated. Please
18# use gcc-specs-* from toolchain-funcs.eclass instead, if you
19# need to know which hardened techs are active in the compiler.
20# See bug #100974
10# 21#
11#### filter-flags <flags> #### 22# has_hardened
12# Remove particular flags from C[XX]FLAGS 23# has_pie
13# Matches only complete flags 24# has_pic
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 <flag> ####
26# Returns "true" if flag is set in C[XX]FLAGS
27# Matches only complete a flag
28#
29#### strip-flags ####
30# Strip C[XX]FLAGS of everything except known
31# good options.
32#
33#### strip-unsupported-flags ####
34# Strip C[XX]FLAGS of any flags not supported by
35# installed version of gcc
36#
37#### get-flag <flag> ####
38# Find and echo the value for a particular flag
39#
40#### replace-sparc64-flags ####
41# Sets mcpu to v8 and uses the original value
42# as mtune if none specified.
43#
44#### filter-mfpmath <math types> ####
45# Remove specified math types from the fpmath specification
46# If the user has -mfpmath=sse,386, running `filter-mfpmath sse`
47# will leave the user with -mfpmath=386
48#
49#### append-ldflags ####
50# Add extra flags to your current LDFLAGS
51#
52#### filter-ldflags <flags> ####
53# Remove particular flags from LDFLAGS
54# Matches only complete flags
55#
56#### fstack-flags ####
57# hooked function for hardened gcc that appends
58# -fno-stack-protector to {C,CXX,LD}FLAGS
59# when a package is filtering -fstack-protector, -fstack-protector-all
60# notice: modern automatic specs files will also suppress -fstack-protector-all
61# when only -fno-stack-protector is given
62#
63#### has_pic ####
64# Returns true if the compiler by default or with current CFLAGS
65# builds position-independent code.
66#
67#### has_ssp_all #### 25# has_ssp_all
68# Returns true if the compiler by default or with current CFLAGS 26# has_ssp
69# generates stack smash protections for all functions
70#
71#### has_ssp ####
72# Returns true if the compiler by default or with current CFLAGS
73# generates stack smash protections for most vulnerable functions
74#
75 27
28
76# C[XX]FLAGS that we allow in strip-flags 29# {C,CXX,F,FC}FLAGS that we allow in strip-flags
30# Note: shell globs and character lists are allowed
77setup-allowed-flags() { 31setup-allowed-flags() {
78 if [[ -z ${ALLOWED_FLAGS} ]] ; then 32 if [[ -z ${ALLOWED_FLAGS} ]] ; then
79 export ALLOWED_FLAGS="-pipe" 33 export ALLOWED_FLAGS="-pipe"
80 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune" 34 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -O -O0 -O1 -O2 -mcpu -march -mtune"
81 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all" 35 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fstack-protector -fstack-protector-all"
82 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking -fno-bounds-checking" 36 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fbounds-checking"
83 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-pie -fno-unit-at-a-time" 37 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-PIE -fno-pie -fno-unit-at-a-time"
84 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g0 -g1 -g2 -g3 -ggdb -ggdb0 -ggdb1 -ggdb2 -ggdb3" 38 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -g -g[0-9] -ggdb -ggdb[0-9] -gstabs -gstabs+"
39 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-ident"
40 export ALLOWED_FLAGS="${ALLOWED_FLAGS} -W* -w"
85 fi 41 fi
86 # allow a bunch of flags that negate features / control ABI 42 # allow a bunch of flags that negate features / control ABI
87 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all" 43 ALLOWED_FLAGS="${ALLOWED_FLAGS} -fno-stack-protector -fno-stack-protector-all \
44 -fno-strict-aliasing -fno-bounds-checking"
88 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \ 45 ALLOWED_FLAGS="${ALLOWED_FLAGS} -mregparm -mno-app-regs -mapp-regs \
89 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \ 46 -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow \
90 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \ 47 -mips1 -mips2 -mips3 -mips4 -mips32 -mips64 -mips16 \
91 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \ 48 -msoft-float -mno-soft-float -mhard-float -mno-hard-float -mfpu \
49 -mieee -mieee-with-inexact -mschedule \
50 -mtls-direct-seg-refs -mno-tls-direct-seg-refs \
92 -mflat -mno-flat -mno-faster-structs -mfaster-structs \ 51 -mflat -mno-flat -mno-faster-structs -mfaster-structs \
93 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \ 52 -m32 -m64 -mabi -mlittle-endian -mbig-endian -EL -EB -fPIC \
94 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias" 53 -mlive-g0 -mcmodel -mstack-bias -mno-stack-bias \
54 -msecure-plt -D*"
95 55
96 # C[XX]FLAGS that we are think is ok, but needs testing 56 # {C,CXX,F,FC}FLAGS that we are think is ok, but needs testing
97 # NOTE: currently -Os have issues with gcc3 and K6* arch's 57 # NOTE: currently -Os have issues with gcc3 and K6* arch's
98 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks -fprefetch-loop-arrays" 58 export UNSTABLE_FLAGS="-Os -O3 -freorder-blocks"
99 return 0 59 return 0
100} 60}
101 61
62# inverted filters for hardened compiler. This is trying to unpick
63# the hardened compiler defaults.
64_filter-hardened() {
65 local f
66 for f in "$@" ; do
67 case "${f}" in
68 # Ideally we should only concern ourselves with PIE flags,
69 # not -fPIC or -fpic, but too many places filter -fPIC without
70 # thinking about -fPIE.
71 -fPIC|-fpic|-fPIE|-fpie|-Wl,pie|-pie)
72 gcc-specs-pie || continue
73 is-flagq -nopie || append-flags -nopie;;
74 -fstack-protector)
75 gcc-specs-ssp || continue
76 is-flagq -fno-stack-protector || append-flags -fno-stack-protector;;
77 -fstack-protector-all)
78 gcc-specs-ssp-to-all || continue
79 is-flagq -fno-stack-protector-all || append-flags -fno-stack-protector-all;;
80 esac
81 done
82}
83
84# Remove occurrences of strings from variable given in $1
85# Strings removed are matched as globs, so for example
86# '-O*' would remove -O1, -O2 etc.
87_filter-var() {
88 local f x VAR VAL
89 declare -a new
90
91 VAR=$1
92 shift
93 eval VAL=\${${VAR}}
94 for f in ${VAL}; do
95 for x in "$@"; do
96 # Note this should work with globs like -O*
97 [[ ${f} == ${x} ]] && continue 2
98 done
99 eval new\[\${\#new\[@]}]=\${f}
100 done
101 eval export ${VAR}=\${new\[*]}
102}
103
104# @FUNCTION: filter-flags
105# @USAGE: <flags>
106# @DESCRIPTION:
107# Remove particular <flags> from {C,CPP,CXX,F,FC}FLAGS. Accepts shell globs.
102filter-flags() { 108filter-flags() {
103 local x f fset 109 _filter-hardened "$@"
104 declare -a new_CFLAGS new_CXXFLAGS 110 _filter-var CFLAGS "$@"
105 111 _filter-var CPPFLAGS "$@"
106 for x in "$@" ; do 112 _filter-var CXXFLAGS "$@"
107 case "${x}" in 113 _filter-var FFLAGS "$@"
108 -fPIC|-fpic|-fPIE|-fpie|-pie) 114 _filter-var FCFLAGS "$@"
109 append-flags `test_flag -fno-pie`;;
110 -fstack-protector|-fstack-protector-all)
111 fstack-flags;;
112 esac
113 done
114
115 for fset in CFLAGS CXXFLAGS; do
116 # Looping over the flags instead of using a global
117 # substitution ensures that we're working with flag atoms.
118 # Otherwise globs like -O* have the potential to wipe out the
119 # list of flags.
120 for f in ${!fset}; do
121 for x in "$@"; do
122 # Note this should work with globs like -O*
123 [[ ${f} == ${x} ]] && continue 2
124 done
125 eval new_${fset}\[\${\#new_${fset}\[@]}]=\${f}
126 done
127 eval export ${fset}=\${new_${fset}\[*]}
128 done
129
130 return 0 115 return 0
131} 116}
132 117
118# @FUNCTION: filter-lfs-flags
119# @DESCRIPTION:
120# Remove flags that enable Large File Support.
133filter-lfs-flags() { 121filter-lfs-flags() {
122 [[ -n $@ ]] && die "filter-lfs-flags takes no arguments"
134 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 123 filter-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
135} 124}
136 125
126# @FUNCTION: append-cppflags
127# @USAGE: <flags>
128# @DESCRIPTION:
129# Add extra <flags> to the current CPPFLAGS.
130append-cppflags() {
131 [[ -z $* ]] && return 0
132 export CPPFLAGS="${CPPFLAGS} $*"
133 return 0
134}
135
136# @FUNCTION: append-fflags
137# @USAGE: <flags>
138# @DESCRIPTION:
139# Add extra <flags> to the current {F,FC}FLAGS.
140append-fflags() {
141 [[ -z $* ]] && return 0
142 export FFLAGS="${FFLAGS} $*"
143 export FCFLAGS="${FCFLAGS} $*"
144 return 0
145}
146
147# @FUNCTION: append-lfs-flags
148# @DESCRIPTION:
149# Add flags that enable Large File Support.
137append-lfs-flags() { 150append-lfs-flags() {
151 [[ -n $@ ]] && die "append-lfs-flags takes no arguments"
138 append-flags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE 152 append-cppflags -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
139} 153}
140 154
155# @FUNCTION: append-flags
156# @USAGE: <flags>
157# @DESCRIPTION:
158# Add extra <flags> to your current {C,CXX,F,FC}FLAGS.
141append-flags() { 159append-flags() {
142 [[ -z $* ]] && return 0 160 [[ -z $* ]] && return 0
143 export CFLAGS="${CFLAGS} $*" 161 export CFLAGS="${CFLAGS} $*"
144 export CXXFLAGS="${CXXFLAGS} $*" 162 export CXXFLAGS="${CXXFLAGS} $*"
145 [ -n "`is-flag -fno-stack-protector`" -o \ 163 export FFLAGS="${FFLAGS} $*"
146 -n "`is-flag -fno-stack-protector-all`" ] && fstack-flags 164 export FCFLAGS="${FCFLAGS} $*"
147 return 0 165 return 0
148} 166}
149 167
168# @FUNCTION: replace-flags
169# @USAGE: <old> <new>
170# @DESCRIPTION:
171# Replace the <old> flag with <new>. Accepts shell globs for <old>.
150replace-flags() { 172replace-flags() {
173 [[ $# != 2 ]] \
174 && echo && eerror "Usage: replace-flags <old flag> <new flag>" \
175 && die "replace-flags takes 2 arguments, not $#"
176
151 local f fset 177 local f fset
152 declare -a new_CFLAGS new_CXXFLAGS 178 declare -a new_CFLAGS new_CXXFLAGS
153 179
154 for fset in CFLAGS CXXFLAGS; do 180 for fset in CFLAGS CXXFLAGS FFLAGS FCFLAGS; do
155 # Looping over the flags instead of using a global 181 # Looping over the flags instead of using a global
156 # substitution ensures that we're working with flag atoms. 182 # substitution ensures that we're working with flag atoms.
157 # Otherwise globs like -O* have the potential to wipe out the 183 # Otherwise globs like -O* have the potential to wipe out the
158 # list of flags. 184 # list of flags.
159 for f in ${!fset}; do 185 for f in ${!fset}; do
165 done 191 done
166 192
167 return 0 193 return 0
168} 194}
169 195
196# @FUNCTION: replace-cpu-flags
197# @USAGE: <old> <new>
198# @DESCRIPTION:
199# Replace cpu flags (like -march/-mcpu/-mtune) that select the <old> cpu
200# with flags that select the <new> cpu. Accepts shell globs for <old>.
170replace-cpu-flags() { 201replace-cpu-flags() {
171 local newcpu="$#" ; newcpu="${!newcpu}" 202 local newcpu="$#" ; newcpu="${!newcpu}"
172 while [ $# -gt 1 ] ; do 203 while [ $# -gt 1 ] ; do
173 # quote to make sure that no globbing is done (particularly on 204 # quote to make sure that no globbing is done (particularly on
174 # ${oldcpu} prior to calling replace-flags 205 # ${oldcpu}) prior to calling replace-flags
175 replace-flags "-march=${1}" "-march=${newcpu}" 206 replace-flags "-march=${1}" "-march=${newcpu}"
176 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}" 207 replace-flags "-mcpu=${1}" "-mcpu=${newcpu}"
177 replace-flags "-mtune=${1}" "-mtune=${newcpu}" 208 replace-flags "-mtune=${1}" "-mtune=${newcpu}"
178 shift 209 shift
179 done 210 done
180 return 0 211 return 0
181} 212}
182 213
214_is_flagq() {
215 local x
216 for x in ${!1} ; do
217 [[ ${x} == $2 ]] && return 0
218 done
219 return 1
220}
221
222# @FUNCTION: is-flagq
223# @USAGE: <flag>
224# @DESCRIPTION:
225# Returns shell true if <flag> is in {C,CXX,F,FC}FLAGS, else returns shell false. Accepts shell globs.
226is-flagq() {
227 [[ -n $2 ]] && die "Usage: is-flag <flag>"
228 _is_flagq CFLAGS $1 || _is_flagq CXXFLAGS $1 || _is_flagq FFLAGS $1 || _is_flagq FCFLAGS $1
229}
230
231# @FUNCTION: is-flag
232# @USAGE: <flag>
233# @DESCRIPTION:
234# Echo's "true" if flag is set in {C,CXX,F,FC}FLAGS. Accepts shell globs.
183is-flag() { 235is-flag() {
184 local x 236 is-flagq "$@" && echo true
185
186 for x in ${CFLAGS} ${CXXFLAGS} ; do
187 # Note this should work with globs like -mcpu=ultrasparc*
188 if [[ ${x} == ${1} ]]; then
189 echo true
190 return 0
191 fi
192 done
193 return 1
194} 237}
195 238
239# @FUNCTION: is-ldflagq
240# @USAGE: <flag>
241# @DESCRIPTION:
242# Returns shell true if <flag> is in LDFLAGS, else returns shell false. Accepts shell globs.
243is-ldflagq() {
244 [[ -n $2 ]] && die "Usage: is-ldflag <flag>"
245 _is_flagq LDFLAGS $1
246}
247
248# @FUNCTION: is-ldflag
249# @USAGE: <flag>
250# @DESCRIPTION:
251# Echo's "true" if flag is set in LDFLAGS. Accepts shell globs.
252is-ldflag() {
253 is-ldflagq "$@" && echo true
254}
255
256# @FUNCTION: filter-mfpmath
257# @USAGE: <math types>
258# @DESCRIPTION:
259# Remove specified math types from the fpmath flag. For example, if the user
260# has -mfpmath=sse,386, running `filter-mfpmath sse` will leave the user with
261# -mfpmath=386.
196filter-mfpmath() { 262filter-mfpmath() {
197 local orig_mfpmath new_math prune_math 263 local orig_mfpmath new_math prune_math
198 264
199 # save the original -mfpmath flag 265 # save the original -mfpmath flag
200 orig_mfpmath="`get-flag -mfpmath`" 266 orig_mfpmath=$(get-flag -mfpmath)
201 # get the value of the current -mfpmath flag 267 # get the value of the current -mfpmath flag
202 new_math=" `get-flag mfpmath | tr , ' '` " 268 new_math=$(get-flag mfpmath)
269 new_math=" ${new_math//,/ } "
203 # figure out which math values are to be removed 270 # figure out which math values are to be removed
204 prune_math="" 271 prune_math=""
205 for prune_math in "$@" ; do 272 for prune_math in "$@" ; do
206 new_math="${new_math/ ${prune_math} / }" 273 new_math=${new_math/ ${prune_math} / }
207 done 274 done
208 new_math="`echo ${new_math:1:${#new_math}-2} | tr ' ' ,`" 275 new_math=$(echo ${new_math})
276 new_math=${new_math// /,}
209 277
210 if [ -z "${new_math}" ] ; then 278 if [[ -z ${new_math} ]] ; then
211 # if we're removing all user specified math values are 279 # if we're removing all user specified math values are
212 # slated for removal, then we just filter the flag 280 # slated for removal, then we just filter the flag
213 filter-flags ${orig_mfpmath} 281 filter-flags ${orig_mfpmath}
214 else 282 else
215 # if we only want to filter some of the user specified 283 # if we only want to filter some of the user specified
217 replace-flags ${orig_mfpmath} -mfpmath=${new_math} 285 replace-flags ${orig_mfpmath} -mfpmath=${new_math}
218 fi 286 fi
219 return 0 287 return 0
220} 288}
221 289
290# @FUNCTION: strip-flags
291# @DESCRIPTION:
292# Strip C[XX]FLAGS of everything except known good/safe flags.
222strip-flags() { 293strip-flags() {
223 local x y flag NEW_CFLAGS NEW_CXXFLAGS 294 local x y flag NEW_CFLAGS NEW_CXXFLAGS NEW_FFLAGS NEW_FCFLAGS
224 295
225 setup-allowed-flags 296 setup-allowed-flags
226 297
227 local NEW_CFLAGS="" 298 local NEW_CFLAGS=""
228 local NEW_CXXFLAGS="" 299 local NEW_CXXFLAGS=""
300 local NEW_FFLAGS=""
301 local NEW_FCFLAGS=""
229 302
230 # Allow unstable C[XX]FLAGS if we are using unstable profile ... 303 # Allow unstable C[XX]FLAGS if we are using unstable profile ...
231 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then 304 if has ~$(tc-arch) ${ACCEPT_KEYWORDS} ; then
232 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}" 305 ALLOWED_FLAGS="${ALLOWED_FLAGS} ${UNSTABLE_FLAGS}"
233 fi 306 fi
252 break 325 break
253 fi 326 fi
254 done 327 done
255 done 328 done
256 329
330 for x in ${FFLAGS}; do
331 for y in ${ALLOWED_FLAGS}; do
332 flag=${x%%=*}
333 if [ "${flag%%${y}}" = "" ] ; then
334 NEW_FFLAGS="${NEW_FFLAGS} ${x}"
335 break
336 fi
337 done
338 done
339
340 for x in ${FCFLAGS}; do
341 for y in ${ALLOWED_FLAGS}; do
342 flag=${x%%=*}
343 if [ "${flag%%${y}}" = "" ] ; then
344 NEW_FCFLAGS="${NEW_FCFLAGS} ${x}"
345 break
346 fi
347 done
348 done
349
257 # In case we filtered out all optimization flags fallback to -O2 350 # In case we filtered out all optimization flags fallback to -O2
258 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then 351 if [ "${CFLAGS/-O}" != "${CFLAGS}" -a "${NEW_CFLAGS/-O}" = "${NEW_CFLAGS}" ]; then
259 NEW_CFLAGS="${NEW_CFLAGS} -O2" 352 NEW_CFLAGS="${NEW_CFLAGS} -O2"
260 fi 353 fi
261 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then 354 if [ "${CXXFLAGS/-O}" != "${CXXFLAGS}" -a "${NEW_CXXFLAGS/-O}" = "${NEW_CXXFLAGS}" ]; then
262 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2" 355 NEW_CXXFLAGS="${NEW_CXXFLAGS} -O2"
263 fi 356 fi
357 if [ "${FFLAGS/-O}" != "${FFLAGS}" -a "${NEW_FFLAGS/-O}" = "${NEW_FFLAGS}" ]; then
358 NEW_FFLAGS="${NEW_FFLAGS} -O2"
359 fi
360 if [ "${FCFLAGS/-O}" != "${FCFLAGS}" -a "${NEW_FCFLAGS/-O}" = "${NEW_FCFLAGS}" ]; then
361 NEW_FCFLAGS="${NEW_FCFLAGS} -O2"
362 fi
264 363
265 set +f # re-enable pathname expansion 364 set +f # re-enable pathname expansion
266 365
267 export CFLAGS="${NEW_CFLAGS}" 366 export CFLAGS="${NEW_CFLAGS}"
268 export CXXFLAGS="${NEW_CXXFLAGS}" 367 export CXXFLAGS="${NEW_CXXFLAGS}"
368 export FFLAGS="${NEW_FFLAGS}"
369 export FCFLAGS="${NEW_FCFLAGS}"
370 return 0
371}
372
373test-flag-PROG() {
374 local comp=$1
375 local flags="$2"
376
377 [[ -z ${comp} || -z ${flags} ]] && \
269 return 0 378 return 1
270}
271 379
380 local PROG=$(tc-get${comp})
381 ${PROG} ${flags} -S -o /dev/null -xc /dev/null \
382 > /dev/null 2>&1
383}
384
385# @FUNCTION: test-flag-CC
386# @USAGE: <flag>
387# @DESCRIPTION:
388# Returns shell true if <flag> is supported by the C compiler, else returns shell false.
389test-flag-CC() { test-flag-PROG "CC" "$1"; }
390
391# @FUNCTION: test-flag-CXX
392# @USAGE: <flag>
393# @DESCRIPTION:
394# Returns shell true if <flag> is supported by the C++ compiler, else returns shell false.
395test-flag-CXX() { test-flag-PROG "CXX" "$1"; }
396
397# @FUNCTION: test-flag-F77
398# @USAGE: <flag>
399# @DESCRIPTION:
400# Returns shell true if <flag> is supported by the Fortran 77 compiler, else returns shell false.
401test-flag-F77() { test-flag-PROG "F77" "$1"; }
402
403# @FUNCTION: test-flag-FC
404# @USAGE: <flag>
405# @DESCRIPTION:
406# Returns shell true if <flag> is supported by the Fortran 90 compiler, else returns shell false.
407test-flag-FC() { test-flag-PROG "FC" "$1"; }
408
409test-flags-PROG() {
410 local comp=$1
411 local flags
412 local x
413
414 shift
415
416 [[ -z ${comp} ]] && return 1
417
418 x=""
419 for x in "$@" ; do
420 test-flag-${comp} "${x}" && flags="${flags}${flags:+ }${x}"
421 done
422
423 echo "${flags}"
424
425 # Just bail if we dont have any flags
426 [[ -n ${flags} ]]
427}
428
429# @FUNCTION: test-flags-CC
430# @USAGE: <flags>
431# @DESCRIPTION:
432# Returns shell true if <flags> are supported by the C compiler, else returns shell false.
433test-flags-CC() { test-flags-PROG "CC" "$@"; }
434
435# @FUNCTION: test-flags-CXX
436# @USAGE: <flags>
437# @DESCRIPTION:
438# Returns shell true if <flags> are supported by the C++ compiler, else returns shell false.
439test-flags-CXX() { test-flags-PROG "CXX" "$@"; }
440
441# @FUNCTION: test-flags-F77
442# @USAGE: <flags>
443# @DESCRIPTION:
444# Returns shell true if <flags> are supported by the Fortran 77 compiler, else returns shell false.
445test-flags-F77() { test-flags-PROG "F77" "$@"; }
446
447# @FUNCTION: test-flags-FC
448# @USAGE: <flags>
449# @DESCRIPTION:
450# Returns shell true if <flags> are supported by the Fortran 90 compiler, else returns shell false.
451test-flags-FC() { test-flags-PROG "FC" "$@"; }
452
453# @FUNCTION: test-flags
454# @USAGE: <flags>
455# @DESCRIPTION:
456# Short-hand that should hopefully work for both C and C++ compiler, but
457# its really only present due to the append-flags() abomination.
458test-flags() { test-flags-CC "$@"; }
459
460# @FUNCTION: test_flag
461# @DESCRIPTION:
462# DEPRICIATED, use test-flags()
272test_flag() { 463test_flag() {
273 if $(tc-getCC) -S -xc "$@" -o "$(emktemp)" /dev/null &>/dev/null; then 464 ewarn "test_flag: deprecated, please use test-flags()!" >&2
274 printf "%s\n" "$*"
275 return 0
276 fi
277 return 1
278}
279 465
466 test-flags-CC "$@"
467}
468
469# @FUNCTION: test_version_info
470# @USAGE: <version>
471# @DESCRIPTION:
472# Returns shell true if the current C compiler version matches <version>, else returns shell false.
473# Accepts shell globs.
280test_version_info() { 474test_version_info() {
281 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then 475 if [[ $($(tc-getCC) --version 2>&1) == *$1* ]]; then
282 return 0 476 return 0
283 else 477 else
284 return 1 478 return 1
285 fi 479 fi
286} 480}
287 481
482# @FUNCTION: strip-unsupported-flags
483# @DESCRIPTION:
484# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
288strip-unsupported-flags() { 485strip-unsupported-flags() {
289 local NEW_CFLAGS NEW_CXXFLAGS 486 export CFLAGS=$(test-flags-CC ${CFLAGS})
290 487 export CXXFLAGS=$(test-flags-CXX ${CXXFLAGS})
291 for x in ${CFLAGS} ; do 488 export FFLAGS=$(test-flags-F77 ${FFLAGS})
292 NEW_CFLAGS="${NEW_CFLAGS} `test_flag ${x}`" 489 export FCFLAGS=$(test-flags-FC ${FCFLAGS})
293 done
294 for x in ${CXXFLAGS} ; do
295 NEW_CXXFLAGS="${NEW_CXXFLAGS} `test_flag ${x}`"
296 done
297
298 export CFLAGS="${NEW_CFLAGS}"
299 export CXXFLAGS="${NEW_CXXFLAGS}"
300} 490}
301 491
492# @FUNCTION: get-flag
493# @USAGE: <flag>
494# @DESCRIPTION:
495# Find and echo the value for a particular flag. Accepts shell globs.
302get-flag() { 496get-flag() {
303 local f findflag="$1" 497 local f findflag="$1"
304 498
305 # this code looks a little flaky but seems to work for 499 # this code looks a little flaky but seems to work for
306 # everything we want ... 500 # everything we want ...
307 # for example, if CFLAGS="-march=i686": 501 # for example, if CFLAGS="-march=i686":
308 # `get-flag -march` == "-march=i686" 502 # `get-flag -march` == "-march=i686"
309 # `get-flag march` == "i686" 503 # `get-flag march` == "i686"
310 for f in ${CFLAGS} ${CXXFLAGS} ; do 504 for f in ${CFLAGS} ${CXXFLAGS} ${FFLAGS} ${FCFLAGS} ; do
311 if [ "${f/${findflag}}" != "${f}" ] ; then 505 if [ "${f/${findflag}}" != "${f}" ] ; then
312 printf "%s\n" "${f/-${findflag}=}" 506 printf "%s\n" "${f/-${findflag}=}"
313 return 0 507 return 0
314 fi 508 fi
315 done 509 done
316 return 1 510 return 1
317} 511}
318 512
513# @FUNCTION: has_hardened
514# @DESCRIPTION:
515# DEPRECATED - use gcc-specs-relro or gcc-specs-now from toolchain-funcs
319has_hardened() { 516has_hardened() {
517 ewarn "has_hardened: deprecated, please use gcc-specs-{relro,now}()!" >&2
518
320 test_version_info Hardened && return 0 519 test_version_info Hardened && return 0
321 # the specs file wont exist unless gcc has GCC_SPECS support 520 # The specs file wont exist unless gcc has GCC_SPECS support
322 [ -f "${GCC_SPECS}" -a "${GCC_SPECS}" != "${GCC_SPECS/hardened/}" ] && \ 521 [[ -f ${GCC_SPECS} && ${GCC_SPECS} != ${GCC_SPECS/hardened/} ]]
323 return 0
324 return 1
325} 522}
326 523
524# @FUNCTION: has_pic
525# @DESCRIPTION:
526# DEPRECATED - use gcc-specs-pie from toolchain-funcs
327# indicate whether PIC is set 527# indicate whether PIC is set
328has_pic() { 528has_pic() {
329 [ "${CFLAGS/-fPIC}" != "${CFLAGS}" ] && return 0 529 ewarn "has_pic: deprecated, please use gcc-specs-pie()!" >&2
330 [ "${CFLAGS/-fpic}" != "${CFLAGS}" ] && return 0
331 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
332 return 1
333}
334 530
531 [[ ${CFLAGS/-fPIC} != ${CFLAGS} || \
532 ${CFLAGS/-fpic} != ${CFLAGS} ]] || \
533 gcc-specs-pie
534}
535
536# @FUNCTION: has_pie
537# @DESCRIPTION:
538# DEPRECATED - use gcc-specs-pie from toolchain-funcs
335# indicate whether PIE is set 539# indicate whether PIE is set
336has_pie() { 540has_pie() {
337 [ "${CFLAGS/-fPIE}" != "${CFLAGS}" ] && return 0 541 ewarn "has_pie: deprecated, please use gcc-specs-pie()!" >&2
338 [ "${CFLAGS/-fpie}" != "${CFLAGS}" ] && return 0
339 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIE__)" ] && return 0
340 # test PIC while waiting for specs to be updated to generate __PIE__
341 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __PIC__)" ] && return 0
342 return 1
343}
344 542
543 [[ ${CFLAGS/-fPIE} != ${CFLAGS} || \
544 ${CFLAGS/-fpie} != ${CFLAGS} ]] || \
545 gcc-specs-pie
546}
547
548# @FUNCTION: has_ssp_all
549# @DESCRIPTION:
550# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
345# indicate whether code for SSP is being generated for all functions 551# indicate whether code for SSP is being generated for all functions
346has_ssp_all() { 552has_ssp_all() {
553 ewarn "has_ssp_all: deprecated, please use gcc-specs-ssp()!" >&2
554
347 # note; this matches only -fstack-protector-all 555 # note; this matches only -fstack-protector-all
348 [ "${CFLAGS/-fstack-protector-all}" != "${CFLAGS}" ] && return 0 556 [[ ${CFLAGS/-fstack-protector-all} != ${CFLAGS} || \
349 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__)" ] && return 0 557 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP_ALL__) ]] || \
350 return 1 558 gcc-specs-ssp-all
351} 559}
352 560
561# @FUNCTION: has_ssp
562# @DESCRIPTION:
563# DEPRECATED - use gcc-specs-ssp from toolchain-funcs
353# indicate whether code for SSP is being generated 564# indicate whether code for SSP is being generated
354has_ssp() { 565has_ssp() {
566 ewarn "has_ssp: deprecated, please use gcc-specs-ssp()!" >&2
567
355 # note; this matches both -fstack-protector and -fstack-protector-all 568 # note; this matches both -fstack-protector and -fstack-protector-all
356 [ "${CFLAGS/-fstack-protector}" != "${CFLAGS}" ] && return 0 569 [[ ${CFLAGS/-fstack-protector} != ${CFLAGS} || \
357 [ "$(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__)" ] && return 0 570 -n $(echo | $(tc-getCC) ${CFLAGS} -E -dM - | grep __SSP__) ]] || \
358 return 1 571 gcc-specs-ssp
359} 572}
360 573
574# @FUNCTION: has_m64
575# @DESCRIPTION:
576# This doesn't test if the flag is accepted, it tests if the flag actually
577# WORKS. Non-multilib gcc will take both -m32 and -m64. If the flag works
578# return code is 0, else the return code is 1.
361has_m64() { 579has_m64() {
362 # this doesnt test if the flag is accepted, it tests if the flag 580 # this doesnt test if the flag is accepted, it tests if the flag
363 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 581 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
364 # please dont replace this function with test_flag in some future 582 # please dont replace this function with test_flag in some future
365 # clean-up! 583 # clean-up!
584
366 local temp="$(emktemp)" 585 local temp="$(emktemp)"
367 echo "int main() { return(0); }" > ${temp}.c 586 echo "int main() { return(0); }" > "${temp}".c
368 MY_CC=$(tc-getCC) 587 MY_CC=$(tc-getCC)
369 ${MY_CC/ .*/} -m64 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 588 ${MY_CC/ .*/} -m64 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
370 local ret=$? 589 local ret=$?
371 rm -f ${temp}.c 590 rm -f "${temp}".c
372 [ "$ret" != "1" ] && return 0 591 [[ ${ret} != 1 ]] && return 0
373 return 1 592 return 1
374} 593}
375 594
595# @FUNCTION: has_m32
596# @DESCRIPTION:
597# This doesn't test if the flag is accepted, it tests if the flag actually
598# WORKS. Non-mulilib gcc will take both -m32 and -64. If the flag works return
599# code is 0, else return code is 1.
376has_m32() { 600has_m32() {
377 # this doesnt test if the flag is accepted, it tests if the flag 601 # this doesnt test if the flag is accepted, it tests if the flag
378 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64! 602 # actually -WORKS-. non-multilib gcc will take both -m32 and -m64!
379 # please dont replace this function with test_flag in some future 603 # please dont replace this function with test_flag in some future
380 # clean-up! 604 # clean-up!
381 605
382 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0 606 [ "$(tc-arch)" = "amd64" ] && has_multilib_profile && return 0
383 607
384 local temp="$(emktemp)" 608 local temp=$(emktemp)
385 echo "int main() { return(0); }" > ${temp}.c 609 echo "int main() { return(0); }" > "${temp}".c
386 MY_CC=$(tc-getCC) 610 MY_CC=$(tc-getCC)
387 ${MY_CC/ .*/} -m32 -o "$(emktemp)" ${temp}.c > /dev/null 2>&1 611 ${MY_CC/ .*/} -m32 -o "$(emktemp)" "${temp}".c > /dev/null 2>&1
388 local ret=$? 612 local ret=$?
389 rm -f ${temp}.c 613 rm -f "${temp}".c
390 [ "$ret" != "1" ] && return 0 614 [[ ${ret} != 1 ]] && return 0
391 return 1 615 return 1
392} 616}
393 617
618# @FUNCTION: replace-sparc64-flags
619# @DESCRIPTION:
620# Sets mcpu to v8 and uses the original value as mtune if none specified.
394replace-sparc64-flags() { 621replace-sparc64-flags() {
395 local SPARC64_CPUS="ultrasparc v9" 622 local SPARC64_CPUS="ultrasparc3 ultrasparc v9"
396 623
397 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then 624 if [ "${CFLAGS/mtune}" != "${CFLAGS}" ]; then
398 for x in ${SPARC64_CPUS}; do 625 for x in ${SPARC64_CPUS}; do
399 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}" 626 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8}"
400 done 627 done
401 else 628 else
402 for x in ${SPARC64_CPUS}; do 629 for x in ${SPARC64_CPUS}; do
403 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 630 CFLAGS="${CFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
404 done 631 done
405 fi 632 fi
406 633
407 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then 634 if [ "${CXXFLAGS/mtune}" != "${CXXFLAGS}" ]; then
408 for x in ${SPARC64_CPUS}; do 635 for x in ${SPARC64_CPUS}; do
409 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}" 636 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8}"
410 done 637 done
411 else 638 else
412 for x in ${SPARC64_CPUS}; do 639 for x in ${SPARC64_CPUS}; do
413 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}" 640 CXXFLAGS="${CXXFLAGS/-mcpu=${x}/-mcpu=v8 -mtune=${x}}"
414 done 641 done
415 fi 642 fi
416 643
417 export CFLAGS CXXFLAGS 644 export CFLAGS CXXFLAGS
418} 645}
419 646
647# @FUNCTION: append-ldflags
648# @USAGE: <flags>
649# @DESCRIPTION:
650# Add extra <flags> to the current LDFLAGS.
420append-ldflags() { 651append-ldflags() {
652 [[ -z $* ]] && return 0
653 local flag
654 for flag in "$@"; do
655 [[ ${flag} == -l* ]] && \
656 ewarn "Appending a library link instruction (${flag}); libraries to link to should not be passed through LDFLAGS"
657 done
658
421 export LDFLAGS="${LDFLAGS} $*" 659 export LDFLAGS="${LDFLAGS} $*"
422 return 0 660 return 0
423} 661}
424 662
663# @FUNCTION: filter-ldflags
664# @USAGE: <flags>
665# @DESCRIPTION:
666# Remove particular <flags> from LDFLAGS. Accepts shell globs.
425filter-ldflags() { 667filter-ldflags() {
426 local x 668 _filter-var LDFLAGS "$@"
669 return 0
670}
427 671
428 # we do this fancy spacing stuff so as to not filter 672# @FUNCTION: raw-ldflags
429 # out part of a flag ... we want flag atoms ! :D 673# @USAGE: <flags>
430 LDFLAGS=" ${LDFLAGS} " 674# @DESCRIPTION:
675# Turn C style ldflags (-Wl,-foo) into straight ldflags - the results
676# are suitable for passing directly to 'ld'; note LDFLAGS is usually passed
677# to gcc where it needs the '-Wl,'.
678raw-ldflags() {
679 local x input="$@"
680 [[ -z ${input} ]] && input=${LDFLAGS}
681 set --
431 for x in "$@" ; do 682 for x in ${input} ; do
432 LDFLAGS=${LDFLAGS// ${x} / } 683 x=${x#-Wl,}
684 set -- "$@" ${x//,/ }
433 done 685 done
434 [[ -z ${LDFLAGS// } ]] \ 686 echo "$@"
435 && LDFLAGS="" \
436 || LDFLAGS=${LDFLAGS:1:${#LDFLAGS}-2}
437 export LDFLAGS
438 return 0
439} 687}
440 688
441fstack-flags() { 689# @FUNCTION: bindnow-flags
442 if has_ssp; then 690# @RETURN: Returns the flags to enable "now" binding in the current selected linker.
443 [ -z "`is-flag -fno-stack-protector`" ] && 691# @DESCRIPTION:
444 export CFLAGS="${CFLAGS} `test_flag -fno-stack-protector`" 692# DEPRECATED - Gets the flags needed for "NOW" binding
445 fi 693bindnow-flags() {
446 return 0 694 ewarn "QA: stop using the bindnow-flags function ... simply drop it from your ebuild" >&2
447}
448 695
449# This is thanks to great work from Paul de Vrieze <gentoo-user@devrieze.net>, 696 case $($(tc-getLD) -v 2>&1 </dev/null) in
450# bug #9016. Also thanks to Jukka Salmi <salmi@gmx.net> (bug #13907) for more 697 *GNU* | *'with BFD'*) # GNU ld
451# fixes. 698 echo "-Wl,-z,now" ;;
699 *Apple*) # Darwin ld
700 echo "-bind_at_load" ;;
701 *)
702 # Some linkers just recognize -V instead of -v
703 case $($(tc-getLD) -V 2>&1 </dev/null) in
704 *Solaris*) # Solaris accept almost the same GNU options
705 echo "-Wl,-z,now" ;;
706 esac
707 ;;
708 esac
709}
710
711
712# Some tests for when we screw with things and want to make
713# sure we didn't break anything
714#TESTS() {
715# CFLAGS="-a -b -c=1"
716# CXXFLAGS="-x -y -z=2"
717# LDFLAGS="-l -m -n=3"
452# 718#
453# Export CFLAGS and CXXFLAGS that are compadible with gcc-2.95.3 719# die() { exit 1; }
454gcc2-flags() { 720# (is-flag 1 2 3) && die
455 if [[ $(tc-arch) == "x86" || $(tc-arch) == "amd64" ]] ; then 721# (is-ldflag 1 2 3) && die
456 CFLAGS=${CFLAGS//-mtune=/-mcpu=} 722#
457 CXXFLAGS=${CXXFLAGS//-mtune=/-mcpu=} 723# is-flagq -l && die
458 fi 724# is-ldflagq -a && die
459 725# is-flagq -a || die
460 replace-cpu-flags k6-{2,3} k6 726# is-flagq -x || die
461 replace-cpu-flags athlon{,-{tbird,4,xp,mp}} i686 727# is-ldflagq -n=* || die
462 728# is-ldflagq -n && die
463 replace-cpu-flags pentium-mmx i586 729#
464 replace-cpu-flags pentium{2,3,4} i686 730# strip-unsupported-flags
465 731# [[ ${CFLAGS} == "-c=1" ]] || die
466 replace-cpu-flags ev6{7,8} ev6 732# [[ ${CXXFLAGS} == "-y -z=2" ]] || die
467 733#
468 export CFLAGS CXXFLAGS 734# echo "All tests pass"
469} 735#}
736#TESTS

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