/[gentoo-x86]/eclass/toolchain-funcs.eclass
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1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2007 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/toolchain-funcs.eclass,v 1.42 2005/08/02 13:26:59 azarah Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.90 2009/04/05 07:50:08 grobian Exp $
4# 4
5# @ECLASS: toolchain-funcs.eclass
6# @MAINTAINER:
5# Author: Toolchain Ninjas <ninjas@gentoo.org> 7# Toolchain Ninjas <toolchain@gentoo.org>
6# 8# @BLURB: functions to query common info about the toolchain
7# This eclass contains (or should) functions to get common info 9# @DESCRIPTION:
8# about the toolchain (libc/compiler/binutils/etc...) 10# The toolchain-funcs aims to provide a complete suite of functions
11# for gleaning useful information about the toolchain and to simplify
12# ugly things like cross-compiling and multilib. All of this is done
13# in such a way that you can rely on the function always returning
14# something sane.
9 15
10inherit multilib 16___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
11 17[[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
12 18
13DESCRIPTION="Based on the ${ECLASS} eclass" 19DESCRIPTION="Based on the ${ECLASS} eclass"
14 20
15tc-getPROG() { 21tc-getPROG() {
16 local var=$1 22 local var=$1
21 return 0 27 return 0
22 fi 28 fi
23 29
24 local search= 30 local search=
25 [[ -n $3 ]] && search=$(type -p "$3-${prog}") 31 [[ -n $3 ]] && search=$(type -p "$3-${prog}")
26 [[ -z ${search} && -n $(get_abi_CHOST) ]] && search=$(type -p "$(get_abi_CHOST)-${prog}")
27 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}") 32 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
28 [[ -n ${search} ]] && prog=${search##*/} 33 [[ -n ${search} ]] && prog=${search##*/}
29 34
30 export ${var}=${prog} 35 export ${var}=${prog}
31 echo "${!var}" 36 echo "${!var}"
32} 37}
33 38
34# Returns the name of the archiver 39# @FUNCTION: tc-getAR
40# @USAGE: [toolchain prefix]
41# @RETURN: name of the archiver
35tc-getAR() { tc-getPROG AR ar "$@"; } 42tc-getAR() { tc-getPROG AR ar "$@"; }
36# Returns the name of the assembler 43# @FUNCTION: tc-getAS
44# @USAGE: [toolchain prefix]
45# @RETURN: name of the assembler
37tc-getAS() { tc-getPROG AS as "$@"; } 46tc-getAS() { tc-getPROG AS as "$@"; }
47# @FUNCTION: tc-getCC
48# @USAGE: [toolchain prefix]
38# Returns the name of the C compiler 49# @RETURN: name of the C compiler
39tc-getCC() { tc-getPROG CC gcc "$@"; } 50tc-getCC() { tc-getPROG CC gcc "$@"; }
51# @FUNCTION: tc-getCPP
52# @USAGE: [toolchain prefix]
53# @RETURN: name of the C preprocessor
54tc-getCPP() { tc-getPROG CPP cpp "$@"; }
55# @FUNCTION: tc-getCXX
56# @USAGE: [toolchain prefix]
40# Returns the name of the C++ compiler 57# @RETURN: name of the C++ compiler
41tc-getCXX() { tc-getPROG CXX g++ "$@"; } 58tc-getCXX() { tc-getPROG CXX g++ "$@"; }
42# Returns the name of the linker 59# @FUNCTION: tc-getLD
60# @USAGE: [toolchain prefix]
61# @RETURN: name of the linker
43tc-getLD() { tc-getPROG LD ld "$@"; } 62tc-getLD() { tc-getPROG LD ld "$@"; }
63# @FUNCTION: tc-getSTRIP
64# @USAGE: [toolchain prefix]
65# @RETURN: name of the strip program
66tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
67# @FUNCTION: tc-getNM
68# @USAGE: [toolchain prefix]
44# Returns the name of the symbol/object thingy 69# @RETURN: name of the symbol/object thingy
45tc-getNM() { tc-getPROG NM nm "$@"; } 70tc-getNM() { tc-getPROG NM nm "$@"; }
71# @FUNCTION: tc-getRANLIB
72# @USAGE: [toolchain prefix]
46# Returns the name of the archiver indexer 73# @RETURN: name of the archiver indexer
47tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; } 74tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
48# Returns the name of the fortran compiler 75# @FUNCTION: tc-getOBJCOPY
76# @USAGE: [toolchain prefix]
77# @RETURN: name of the object copier
78tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
79# @FUNCTION: tc-getF77
80# @USAGE: [toolchain prefix]
81# @RETURN: name of the Fortran 77 compiler
49tc-getF77() { tc-getPROG F77 f77 "$@"; } 82tc-getF77() { tc-getPROG F77 f77 "$@"; }
83# @FUNCTION: tc-getFC
84# @USAGE: [toolchain prefix]
85# @RETURN: name of the Fortran 90 compiler
86tc-getFC() { tc-getPROG FC gfortran "$@"; }
87# @FUNCTION: tc-getGCJ
88# @USAGE: [toolchain prefix]
50# Returns the name of the java compiler 89# @RETURN: name of the java compiler
51tc-getGCJ() { tc-getPROG GCJ gcj "$@"; } 90tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
52 91
53# Returns the name of the C compiler for build 92# @FUNCTION: tc-getBUILD_CC
93# @USAGE: [toolchain prefix]
94# @RETURN: name of the C compiler for building binaries to run on the build machine
54tc-getBUILD_CC() { 95tc-getBUILD_CC() {
96 local v
97 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
55 if [[ -n ${CC_FOR_BUILD} ]] ; then 98 if [[ -n ${!v} ]] ; then
56 export BUILD_CC=${CC_FOR_BUILD} 99 export BUILD_CC=${!v}
57 echo "${CC_FOR_BUILD}" 100 echo "${!v}"
58 return 0 101 return 0
59 fi 102 fi
103 done
60 104
61 local search= 105 local search=
62 if [[ -n ${CBUILD} ]] ; then 106 if [[ -n ${CBUILD} ]] ; then
63 search=$(type -p ${CBUILD}-gcc) 107 search=$(type -p ${CBUILD}-gcc)
64 search=${search##*/} 108 search=${search##*/}
65 else
66 search=gcc
67 fi 109 fi
110 search=${search:-gcc}
68 111
69 export BUILD_CC=${search} 112 export BUILD_CC=${search}
70 echo "${search}" 113 echo "${search}"
71} 114}
72 115
116# @FUNCTION: tc-export
117# @USAGE: <list of toolchain variables>
118# @DESCRIPTION:
73# Quick way to export a bunch of vars at once 119# Quick way to export a bunch of compiler vars at once.
74tc-export() { 120tc-export() {
75 local var 121 local var
76 for var in "$@" ; do 122 for var in "$@" ; do
123 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
77 eval tc-get${var} > /dev/null 124 eval tc-get${var} > /dev/null
78 done 125 done
79} 126}
80 127
81# A simple way to see if we're using a cross-compiler ... 128# @FUNCTION: tc-is-cross-compiler
129# @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
82tc-is-cross-compiler() { 130tc-is-cross-compiler() {
83 if [[ -n ${CBUILD} ]] ; then
84 return $([[ ${CBUILD} != ${CHOST} ]]) 131 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
85 fi
86 return 1
87} 132}
88 133
134# @FUNCTION: tc-is-softfloat
135# @DESCRIPTION:
136# See if this toolchain is a softfloat based one.
137# @CODE
138# The possible return values:
139# - only: the target is always softfloat (never had fpu)
140# - yes: the target should support softfloat
141# - no: the target should support hardfloat
142# @CODE
143# This allows us to react differently where packages accept
144# softfloat flags in the case where support is optional, but
145# rejects softfloat flags where the target always lacks an fpu.
146tc-is-softfloat() {
147 case ${CTARGET} in
148 bfin*|h8300*)
149 echo "only" ;;
150 *)
151 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
152 && echo "yes" \
153 || echo "no"
154 ;;
155 esac
156}
89 157
90# Parse information from CBUILD/CHOST/CTARGET rather than 158# Parse information from CBUILD/CHOST/CTARGET rather than
91# use external variables from the profile. 159# use external variables from the profile.
92tc-ninja_magic_to_arch() { 160tc-ninja_magic_to_arch() {
93ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; } 161ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
96 local host=$2 164 local host=$2
97 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}} 165 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
98 166
99 case ${host} in 167 case ${host} in
100 alpha*) echo alpha;; 168 alpha*) echo alpha;;
101 x86_64*) ninj x86_64 amd64;;
102 arm*) echo arm;; 169 arm*) echo arm;;
170 avr*) ninj avr32 avr;;
171 bfin*) ninj blackfin bfin;;
172 cris*) echo cris;;
103 hppa*) ninj parisc hppa;; 173 hppa*) ninj parisc hppa;;
174 i?86*)
175 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
176 # trees have been unified into 'x86'.
177 # FreeBSD still uses i386
178 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
179 echo i386
180 else
181 echo x86
182 fi
183 ;;
104 ia64*) echo ia64;; 184 ia64*) echo ia64;;
105 m68*) echo m68k;; 185 m68*) echo m68k;;
106 mips*) echo mips;; 186 mips*) echo mips;;
107 powerpc64*) echo ppc64;; 187 nios2*) echo nios2;;
188 nios*) echo nios;;
189 powerpc*)
190 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
191 # have been unified into simply 'powerpc', but until 2.6.16,
192 # ppc32 is still using ARCH="ppc" as default
193 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
194 echo powerpc
195 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
196 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
197 echo powerpc
198 else
199 echo ppc
200 fi
201 elif [[ ${host} == powerpc64* ]] ; then
202 echo ppc64
108 powerpc*) [[ ${PROFILE_ARCH} == "ppc64" ]] \ 203 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
109 && ninj ppc64 ppc \ 204 ninj ppc64 ppc
205 else
110 || echo ppc 206 echo ppc
207 fi
111 ;; 208 ;;
209 s390*) echo s390;;
210 sh64*) ninj sh64 sh;;
211 sh*) echo sh;;
112 sparc64*) ninj sparc64 sparc;; 212 sparc64*) ninj sparc64 sparc;;
113 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \ 213 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
114 && ninj sparc64 sparc \ 214 && ninj sparc64 sparc \
115 || echo sparc 215 || echo sparc
116 ;; 216 ;;
117 s390*) echo s390;; 217 vax*) echo vax;;
118 sh64*) ninj sh64 sh;; 218 x86_64*)
119 sh*) echo sh;; 219 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
120 i?86*) ninj i386 x86;; 220 # trees have been unified into 'x86'.
121 *) echo ${ARCH};; 221 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
222 echo x86
223 else
224 ninj x86_64 amd64
225 fi
226 ;;
227
228 # since our usage of tc-arch is largely concerned with
229 # normalizing inputs for testing ${CTARGET}, let's filter
230 # other cross targets (mingw and such) into the unknown.
231 *) echo unknown;;
122 esac 232 esac
123} 233}
234# @FUNCTION: tc-arch-kernel
235# @USAGE: [toolchain prefix]
236# @RETURN: name of the kernel arch according to the compiler target
124tc-arch-kernel() { 237tc-arch-kernel() {
125 tc-ninja_magic_to_arch kern $@ 238 tc-ninja_magic_to_arch kern "$@"
126} 239}
240# @FUNCTION: tc-arch
241# @USAGE: [toolchain prefix]
242# @RETURN: name of the portage arch according to the compiler target
127tc-arch() { 243tc-arch() {
128 tc-ninja_magic_to_arch portage $@ 244 tc-ninja_magic_to_arch portage "$@"
129} 245}
246
130tc-endian() { 247tc-endian() {
131 local host=$1 248 local host=$1
132 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}} 249 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
133 host=${host%%-*} 250 host=${host%%-*}
134 251
135 case ${host} in 252 case ${host} in
136 alpha*) echo big;; 253 alpha*) echo big;;
137 x86_64*) echo little;;
138 arm*b*) echo big;; 254 arm*b*) echo big;;
139 arm*) echo little;; 255 arm*) echo little;;
256 cris*) echo little;;
140 hppa*) echo big;; 257 hppa*) echo big;;
258 i?86*) echo little;;
141 ia64*) echo little;; 259 ia64*) echo little;;
142 m68*) echo big;; 260 m68*) echo big;;
143 mips*l*) echo little;; 261 mips*l*) echo little;;
144 mips*) echo big;; 262 mips*) echo big;;
145 powerpc*) echo big;; 263 powerpc*) echo big;;
146 sparc*) echo big;;
147 s390*) echo big;; 264 s390*) echo big;;
148 sh*b*) echo big;; 265 sh*b*) echo big;;
149 sh*) echo little;; 266 sh*) echo little;;
267 sparc*) echo big;;
150 i?86*) echo little;; 268 x86_64*) echo little;;
151 *) echo wtf;; 269 *) echo wtf;;
152 esac 270 esac
153} 271}
154 272
155# Returns the version as by `$CC -dumpversion` 273# @FUNCTION: gcc-fullversion
274# @RETURN: compiler version (major.minor.micro: [3.4.6])
156gcc-fullversion() { 275gcc-fullversion() {
157 echo "$($(tc-getCC) -dumpversion)" 276 $(tc-getCC "$@") -dumpversion
158} 277}
159# Returns the version, but only the <major>.<minor> 278# @FUNCTION: gcc-version
279# @RETURN: compiler version (major.minor: [3.4].6)
160gcc-version() { 280gcc-version() {
161 echo "$(gcc-fullversion | cut -f1,2 -d.)" 281 gcc-fullversion "$@" | cut -f1,2 -d.
162} 282}
163# Returns the Major version 283# @FUNCTION: gcc-major-version
284# @RETURN: major compiler version (major: [3].4.6)
164gcc-major-version() { 285gcc-major-version() {
165 echo "$(gcc-version | cut -f1 -d.)" 286 gcc-version "$@" | cut -f1 -d.
166} 287}
167# Returns the Minor version 288# @FUNCTION: gcc-minor-version
289# @RETURN: minor compiler version (minor: 3.[4].6)
168gcc-minor-version() { 290gcc-minor-version() {
169 echo "$(gcc-version | cut -f2 -d.)" 291 gcc-version "$@" | cut -f2 -d.
170} 292}
171# Returns the Micro version 293# @FUNCTION: gcc-micro-version
294# @RETURN: micro compiler version (micro: 3.4.[6])
172gcc-micro-version() { 295gcc-micro-version() {
173 echo "$(gcc-fullversion | cut -f3 -d. | cut -f1 -d-)" 296 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
174} 297}
175 298
299# Returns the installation directory - internal toolchain
300# function for use by _gcc-specs-exists (for flag-o-matic).
301_gcc-install-dir() {
302 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
303 awk '$1=="install:" {print $2}')"
304}
305# Returns true if the indicated specs file exists - internal toolchain
306# function for use by flag-o-matic.
307_gcc-specs-exists() {
308 [[ -f $(_gcc-install-dir)/$1 ]]
309}
310
311# Returns requested gcc specs directive unprocessed - for used by
312# gcc-specs-directive()
313# Note; later specs normally overwrite earlier ones; however if a later
314# spec starts with '+' then it appends.
315# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
316# as "Reading <file>", in order. Strictly speaking, if there's a
317# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
318# the same token anything from 'gcc -dumpspecs' is overridden by
319# the contents of $(gcc_install_dir)/specs so the result is the
320# same either way.
321_gcc-specs-directive_raw() {
322 local cc=$(tc-getCC)
323 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
324 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
325'BEGIN { pspec=""; spec=""; outside=1 }
326$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
327 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
328 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
329 { spec=spec $0 }
330END { print spec }'
331 return 0
332}
333
176# Returns requested gcc specs directive 334# Return the requested gcc specs directive, with all included
177# Note; if a spec exists more than once (e.g. in more than one specs file) 335# specs expanded.
178# the last one read is the active definition - i.e. they do not accumulate, 336# Note, it does not check for inclusion loops, which cause it
179# each new definition replaces any previous definition. 337# to never finish - but such loops are invalid for gcc and we're
338# assuming gcc is operational.
180gcc-specs-directive() { 339gcc-specs-directive() {
181 local specfiles=$($(tc-getCC) -v 2>&1 | grep "^Reading" | awk '{print $NF}') 340 local directive subdname subdirective
182 [[ -z ${specfiles} ]] && return 0 341 directive="$(_gcc-specs-directive_raw $1)"
183 awk -v spec=$1 \ 342 while [[ ${directive} == *%\(*\)* ]]; do
184'BEGIN { sstr=""; outside=1 } 343 subdname=${directive/*%\(}
185 $1=="*"spec":" { sstr=""; outside=0; next } 344 subdname=${subdname/\)*}
186 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next } 345 subdirective="$(_gcc-specs-directive_raw ${subdname})"
187 { sstr=sstr $0 } 346 directive="${directive//\%(${subdname})/${subdirective}}"
188END { print sstr }' ${specfiles} 347 done
348 echo "${directive}"
349 return 0
189} 350}
190 351
191# Returns true if gcc sets relro 352# Returns true if gcc sets relro
192gcc-specs-relro() { 353gcc-specs-relro() {
193 local directive 354 local directive
194 directive=$(gcc-specs-directive link_command) 355 directive=$(gcc-specs-directive link_command)
195 return $([[ ${directive/\{!norelro:} != ${directive} ]]) 356 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
196} 357}
197# Returns true if gcc sets now 358# Returns true if gcc sets now
198gcc-specs-now() { 359gcc-specs-now() {
199 local directive 360 local directive
200 directive=$(gcc-specs-directive link_command) 361 directive=$(gcc-specs-directive link_command)
201 return $([[ ${directive/\{!nonow:} != ${directive} ]]) 362 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
202} 363}
203# Returns true if gcc builds PIEs 364# Returns true if gcc builds PIEs
204gcc-specs-pie() { 365gcc-specs-pie() {
205 local directive 366 local directive
206 directive=$(gcc-specs-directive cc1) 367 directive=$(gcc-specs-directive cc1)
207 return $([[ ${directive/\{!nopie:} != ${directive} ]]) 368 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
208} 369}
209# Returns true if gcc builds with the stack protector 370# Returns true if gcc builds with the stack protector
210gcc-specs-ssp() { 371gcc-specs-ssp() {
211 local directive 372 local directive
212 directive=$(gcc-specs-directive cc1) 373 directive=$(gcc-specs-directive cc1)
213 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]]) 374 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
214} 375}
376# Returns true if gcc upgrades fstack-protector to fstack-protector-all
377gcc-specs-ssp-to-all() {
378 local directive
379 directive=$(gcc-specs-directive cc1)
380 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
381}
382# Returns true if gcc builds with fno-strict-overflow
383gcc-specs-nostrict() {
384 local directive
385 directive=$(gcc-specs-directive cc1)
386 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
387}
215 388
389
390# @FUNCTION: gen_usr_ldscript
391# @USAGE: [-a] <list of libs to create linker scripts for>
392# @DESCRIPTION:
393# This function generate linker scripts in /usr/lib for dynamic
394# libs in /lib. This is to fix linking problems when you have
395# the .so in /lib, and the .a in /usr/lib. What happens is that
396# in some cases when linking dynamic, the .a in /usr/lib is used
397# instead of the .so in /lib due to gcc/libtool tweaking ld's
398# library search path. This causes many builds to fail.
399# See bug #4411 for more info.
400#
401# Note that you should in general use the unversioned name of
402# the library (libfoo.so), as ldconfig should usually update it
403# correctly to point to the latest version of the library present.
404gen_usr_ldscript() {
405 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
406 # Just make sure it exists
407 dodir /usr/${libdir}
408
409 if [[ $1 == "-a" ]] ; then
410 auto=true
411 shift
412 dodir /${libdir}
413 fi
414
415 # OUTPUT_FORMAT gives hints to the linker as to what binary format
416 # is referenced ... makes multilib saner
417 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
418 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
419
420 for lib in "$@" ; do
421 if [[ ${USERLAND} == "Darwin" ]] ; then
422 ewarn "Not creating fake dynamic library for $lib on Darwin;"
423 ewarn "making a symlink instead."
424 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
425 else
426 local tlib
427 if ${auto} ; then
428 lib="lib${lib}${suffix}"
429 tlib=$(scanelf -qF'%S#F' "${D}"/usr/${libdir}/${lib})
430 mv "${D}"/usr/${libdir}/${lib}* "${D}"/${libdir}/ || die
431 # some SONAMEs are funky: they encode a version before the .so
432 if [[ ${tlib} != ${lib}* ]] ; then
433 mv "${D}"/usr/${libdir}/${tlib}* "${D}"/${libdir}/ || die
434 fi
435 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
436 rm -f "${D}"/${libdir}/${lib}
437 else
438 tlib=${lib}
439 fi
440 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
441 /* GNU ld script
442 Since Gentoo has critical dynamic libraries in /lib, and the static versions
443 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
444 run into linking problems. This "fake" dynamic lib is a linker script that
445 redirects the linker to the real lib. And yes, this works in the cross-
446 compiling scenario as the sysroot-ed linker will prepend the real path.
447
448 See bug http://bugs.gentoo.org/4411 for more info.
449 */
450 ${output_format}
451 GROUP ( /${libdir}/${tlib} )
452 END_LDSCRIPT
453 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
454 fi
455 done
456}

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