/[gentoo-x86]/eclass/toolchain-funcs.eclass
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1# Copyright 1999-2007 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 1.69 2007/03/27 01:46:50 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.92 2009/08/15 15:11:17 grobian Exp $
4# 4
5# @ECLASS: toolchain-funcs.eclass
6# @MAINTAINER:
5# Maintainer: Toolchain Ninjas <toolchain@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
10___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes" 16___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
11[[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib 17[[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
12 18
13DESCRIPTION="Based on the ${ECLASS} eclass" 19DESCRIPTION="Based on the ${ECLASS} eclass"
28 34
29 export ${var}=${prog} 35 export ${var}=${prog}
30 echo "${!var}" 36 echo "${!var}"
31} 37}
32 38
33# Returns the name of the archiver 39# @FUNCTION: tc-getAR
40# @USAGE: [toolchain prefix]
41# @RETURN: name of the archiver
34tc-getAR() { tc-getPROG AR ar "$@"; } 42tc-getAR() { tc-getPROG AR ar "$@"; }
35# Returns the name of the assembler 43# @FUNCTION: tc-getAS
44# @USAGE: [toolchain prefix]
45# @RETURN: name of the assembler
36tc-getAS() { tc-getPROG AS as "$@"; } 46tc-getAS() { tc-getPROG AS as "$@"; }
47# @FUNCTION: tc-getCC
48# @USAGE: [toolchain prefix]
37# Returns the name of the C compiler 49# @RETURN: name of the C compiler
38tc-getCC() { tc-getPROG CC gcc "$@"; } 50tc-getCC() { tc-getPROG CC gcc "$@"; }
51# @FUNCTION: tc-getCPP
52# @USAGE: [toolchain prefix]
39# Returns the name of the C preprocessor 53# @RETURN: name of the C preprocessor
40tc-getCPP() { tc-getPROG CPP cpp "$@"; } 54tc-getCPP() { tc-getPROG CPP cpp "$@"; }
55# @FUNCTION: tc-getCXX
56# @USAGE: [toolchain prefix]
41# Returns the name of the C++ compiler 57# @RETURN: name of the C++ compiler
42tc-getCXX() { tc-getPROG CXX g++ "$@"; } 58tc-getCXX() { tc-getPROG CXX g++ "$@"; }
43# Returns the name of the linker 59# @FUNCTION: tc-getLD
60# @USAGE: [toolchain prefix]
61# @RETURN: name of the linker
44tc-getLD() { tc-getPROG LD ld "$@"; } 62tc-getLD() { tc-getPROG LD ld "$@"; }
45# Returns the name of the strip prog 63# @FUNCTION: tc-getSTRIP
64# @USAGE: [toolchain prefix]
65# @RETURN: name of the strip program
46tc-getSTRIP() { tc-getPROG STRIP strip "$@"; } 66tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
67# @FUNCTION: tc-getNM
68# @USAGE: [toolchain prefix]
47# Returns the name of the symbol/object thingy 69# @RETURN: name of the symbol/object thingy
48tc-getNM() { tc-getPROG NM nm "$@"; } 70tc-getNM() { tc-getPROG NM nm "$@"; }
71# @FUNCTION: tc-getRANLIB
72# @USAGE: [toolchain prefix]
49# Returns the name of the archiver indexer 73# @RETURN: name of the archiver indexer
50tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; } 74tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
75# @FUNCTION: tc-getOBJCOPY
76# @USAGE: [toolchain prefix]
77# @RETURN: name of the object copier
78tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
79# @FUNCTION: tc-getF77
80# @USAGE: [toolchain prefix]
51# Returns the name of the fortran 77 compiler 81# @RETURN: name of the Fortran 77 compiler
52tc-getF77() { tc-getPROG F77 f77 "$@"; } 82tc-getF77() { tc-getPROG F77 f77 "$@"; }
83# @FUNCTION: tc-getFC
84# @USAGE: [toolchain prefix]
53# Returns the name of the fortran 90 compiler 85# @RETURN: name of the Fortran 90 compiler
54tc-getF90() { tc-getPROG F90 gfortran "$@"; } 86tc-getFC() { tc-getPROG FC gfortran "$@"; }
55# Returns the name of the fortran compiler 87# @FUNCTION: tc-getGCJ
56tc-getFORTRAN() { tc-getPROG FORTRAN gfortran "$@"; } 88# @USAGE: [toolchain prefix]
57# Returns the name of the java compiler 89# @RETURN: name of the java compiler
58tc-getGCJ() { tc-getPROG GCJ gcj "$@"; } 90tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
59 91
60# 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
61tc-getBUILD_CC() { 95tc-getBUILD_CC() {
62 local v 96 local v
63 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do 97 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
64 if [[ -n ${!v} ]] ; then 98 if [[ -n ${!v} ]] ; then
65 export BUILD_CC=${!v} 99 export BUILD_CC=${!v}
77 111
78 export BUILD_CC=${search} 112 export BUILD_CC=${search}
79 echo "${search}" 113 echo "${search}"
80} 114}
81 115
116# @FUNCTION: tc-export
117# @USAGE: <list of toolchain variables>
118# @DESCRIPTION:
82# Quick way to export a bunch of vars at once 119# Quick way to export a bunch of compiler vars at once.
83tc-export() { 120tc-export() {
84 local var 121 local var
85 for var in "$@" ; do 122 for var in "$@" ; do
123 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
86 eval tc-get${var} > /dev/null 124 eval tc-get${var} > /dev/null
87 done 125 done
88} 126}
89 127
90# 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
91tc-is-cross-compiler() { 130tc-is-cross-compiler() {
92 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]]) 131 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
93} 132}
94 133
134# @FUNCTION: tc-is-softfloat
135# @DESCRIPTION:
95# See if this toolchain is a softfloat based one. 136# See if this toolchain is a softfloat based one.
137# @CODE
96# The possible return values: 138# The possible return values:
97# - only: the target is always softfloat (never had fpu) 139# - only: the target is always softfloat (never had fpu)
98# - yes: the target should support softfloat 140# - yes: the target should support softfloat
99# - no: the target should support hardfloat 141# - no: the target should support hardfloat
142# @CODE
100# This allows us to react differently where packages accept 143# This allows us to react differently where packages accept
101# softfloat flags in the case where support is optional, but 144# softfloat flags in the case where support is optional, but
102# rejects softfloat flags where the target always lacks an fpu. 145# rejects softfloat flags where the target always lacks an fpu.
103tc-is-softfloat() { 146tc-is-softfloat() {
104 case ${CTARGET} in 147 case ${CTARGET} in
110 || echo "no" 153 || echo "no"
111 ;; 154 ;;
112 esac 155 esac
113} 156}
114 157
158# @FUNCTION: tc-is-static-only
159# @DESCRIPTION:
160# Return shell true if the target does not support shared libs, shell false
161# otherwise.
162tc-is-static-only() {
163 local host=${CTARGET:-${CHOST}}
164
165 # *MiNT doesn't have shared libraries, only platform so far
166 return $([[ ${host} == *-mint* ]])
167}
168
169
115# Parse information from CBUILD/CHOST/CTARGET rather than 170# Parse information from CBUILD/CHOST/CTARGET rather than
116# use external variables from the profile. 171# use external variables from the profile.
117tc-ninja_magic_to_arch() { 172tc-ninja_magic_to_arch() {
118ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; } 173ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
119 174
122 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}} 177 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
123 178
124 case ${host} in 179 case ${host} in
125 alpha*) echo alpha;; 180 alpha*) echo alpha;;
126 arm*) echo arm;; 181 arm*) echo arm;;
182 avr*) ninj avr32 avr;;
127 bfin*) ninj blackfin bfin;; 183 bfin*) ninj blackfin bfin;;
128 cris*) echo cris;; 184 cris*) echo cris;;
129 hppa*) ninj parisc hppa;; 185 hppa*) ninj parisc hppa;;
130 i?86*) ninj i386 x86;; 186 i?86*)
187 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
188 # trees have been unified into 'x86'.
189 # FreeBSD still uses i386
190 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
191 echo i386
192 else
193 echo x86
194 fi
195 ;;
131 ia64*) echo ia64;; 196 ia64*) echo ia64;;
132 m68*) echo m68k;; 197 m68*) echo m68k;;
133 mips*) echo mips;; 198 mips*) echo mips;;
134 nios2*) echo nios2;; 199 nios2*) echo nios2;;
135 nios*) echo nios;; 200 nios*) echo nios;;
160 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \ 225 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
161 && ninj sparc64 sparc \ 226 && ninj sparc64 sparc \
162 || echo sparc 227 || echo sparc
163 ;; 228 ;;
164 vax*) echo vax;; 229 vax*) echo vax;;
165 x86_64*) ninj x86_64 amd64;; 230 x86_64*)
166 *) echo ${ARCH};; 231 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
232 # trees have been unified into 'x86'.
233 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
234 echo x86
235 else
236 ninj x86_64 amd64
237 fi
238 ;;
239
240 # since our usage of tc-arch is largely concerned with
241 # normalizing inputs for testing ${CTARGET}, let's filter
242 # other cross targets (mingw and such) into the unknown.
243 *) echo unknown;;
167 esac 244 esac
168} 245}
246# @FUNCTION: tc-arch-kernel
247# @USAGE: [toolchain prefix]
248# @RETURN: name of the kernel arch according to the compiler target
169tc-arch-kernel() { 249tc-arch-kernel() {
170 tc-ninja_magic_to_arch kern $@ 250 tc-ninja_magic_to_arch kern "$@"
171} 251}
252# @FUNCTION: tc-arch
253# @USAGE: [toolchain prefix]
254# @RETURN: name of the portage arch according to the compiler target
172tc-arch() { 255tc-arch() {
173 tc-ninja_magic_to_arch portage $@ 256 tc-ninja_magic_to_arch portage "$@"
174} 257}
175 258
176# Returns the version as by `$CC -dumpversion` 259tc-endian() {
260 local host=$1
261 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
262 host=${host%%-*}
263
264 case ${host} in
265 alpha*) echo big;;
266 arm*b*) echo big;;
267 arm*) echo little;;
268 cris*) echo little;;
269 hppa*) echo big;;
270 i?86*) echo little;;
271 ia64*) echo little;;
272 m68*) echo big;;
273 mips*l*) echo little;;
274 mips*) echo big;;
275 powerpc*) echo big;;
276 s390*) echo big;;
277 sh*b*) echo big;;
278 sh*) echo little;;
279 sparc*) echo big;;
280 x86_64*) echo little;;
281 *) echo wtf;;
282 esac
283}
284
285# @FUNCTION: gcc-fullversion
286# @RETURN: compiler version (major.minor.micro: [3.4.6])
177gcc-fullversion() { 287gcc-fullversion() {
178 $(tc-getCC "$@") -dumpversion 288 $(tc-getCC "$@") -dumpversion
179} 289}
180# Returns the version, but only the <major>.<minor> 290# @FUNCTION: gcc-version
291# @RETURN: compiler version (major.minor: [3.4].6)
181gcc-version() { 292gcc-version() {
182 gcc-fullversion "$@" | cut -f1,2 -d. 293 gcc-fullversion "$@" | cut -f1,2 -d.
183} 294}
184# Returns the Major version 295# @FUNCTION: gcc-major-version
296# @RETURN: major compiler version (major: [3].4.6)
185gcc-major-version() { 297gcc-major-version() {
186 gcc-version "$@" | cut -f1 -d. 298 gcc-version "$@" | cut -f1 -d.
187} 299}
188# Returns the Minor version 300# @FUNCTION: gcc-minor-version
301# @RETURN: minor compiler version (minor: 3.[4].6)
189gcc-minor-version() { 302gcc-minor-version() {
190 gcc-version "$@" | cut -f2 -d. 303 gcc-version "$@" | cut -f2 -d.
191} 304}
192# Returns the Micro version 305# @FUNCTION: gcc-micro-version
306# @RETURN: micro compiler version (micro: 3.4.[6])
193gcc-micro-version() { 307gcc-micro-version() {
194 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d- 308 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
195} 309}
310
196# Returns the installation directory - internal toolchain 311# Returns the installation directory - internal toolchain
197# function for use by _gcc-specs-exists (for flag-o-matic). 312# function for use by _gcc-specs-exists (for flag-o-matic).
198_gcc-install-dir() { 313_gcc-install-dir() {
199 echo "$($(tc-getCC) -print-search-dirs 2> /dev/null |\ 314 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
200 awk '$1=="install:" {print $2}')" 315 awk '$1=="install:" {print $2}')"
201} 316}
202# Returns true if the indicated specs file exists - internal toolchain 317# Returns true if the indicated specs file exists - internal toolchain
203# function for use by flag-o-matic. 318# function for use by flag-o-matic.
204_gcc-specs-exists() { 319_gcc-specs-exists() {
248 363
249# Returns true if gcc sets relro 364# Returns true if gcc sets relro
250gcc-specs-relro() { 365gcc-specs-relro() {
251 local directive 366 local directive
252 directive=$(gcc-specs-directive link_command) 367 directive=$(gcc-specs-directive link_command)
253 return $([[ ${directive/\{!norelro:} != ${directive} ]]) 368 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
254} 369}
255# Returns true if gcc sets now 370# Returns true if gcc sets now
256gcc-specs-now() { 371gcc-specs-now() {
257 local directive 372 local directive
258 directive=$(gcc-specs-directive link_command) 373 directive=$(gcc-specs-directive link_command)
259 return $([[ ${directive/\{!nonow:} != ${directive} ]]) 374 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
260} 375}
261# Returns true if gcc builds PIEs 376# Returns true if gcc builds PIEs
262gcc-specs-pie() { 377gcc-specs-pie() {
263 local directive 378 local directive
264 directive=$(gcc-specs-directive cc1) 379 directive=$(gcc-specs-directive cc1)
265 return $([[ ${directive/\{!nopie:} != ${directive} ]]) 380 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
266} 381}
267# Returns true if gcc builds with the stack protector 382# Returns true if gcc builds with the stack protector
268gcc-specs-ssp() { 383gcc-specs-ssp() {
269 local directive 384 local directive
270 directive=$(gcc-specs-directive cc1) 385 directive=$(gcc-specs-directive cc1)
271 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]]) 386 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
272} 387}
273# Returns true if gcc upgrades fstack-protector to fstack-protector-all 388# Returns true if gcc upgrades fstack-protector to fstack-protector-all
274gcc-specs-ssp-to-all() { 389gcc-specs-ssp-to-all() {
275 local directive 390 local directive
276 directive=$(gcc-specs-directive cc1) 391 directive=$(gcc-specs-directive cc1)
277 return $([[ ${directive/\{!fno-stack-protector-all:} != ${directive} ]]) 392 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
278} 393}
394# Returns true if gcc builds with fno-strict-overflow
395gcc-specs-nostrict() {
396 local directive
397 directive=$(gcc-specs-directive cc1)
398 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
399}
279 400
280 401
402# @FUNCTION: gen_usr_ldscript
403# @USAGE: [-a] <list of libs to create linker scripts for>
404# @DESCRIPTION:
281# This function generate linker scripts in /usr/lib for dynamic 405# This function generate linker scripts in /usr/lib for dynamic
282# libs in /lib. This is to fix linking problems when you have 406# libs in /lib. This is to fix linking problems when you have
283# the .so in /lib, and the .a in /usr/lib. What happens is that 407# the .so in /lib, and the .a in /usr/lib. What happens is that
284# in some cases when linking dynamic, the .a in /usr/lib is used 408# in some cases when linking dynamic, the .a in /usr/lib is used
285# instead of the .so in /lib due to gcc/libtool tweaking ld's 409# instead of the .so in /lib due to gcc/libtool tweaking ld's
286# library search path. This cause many builds to fail. 410# library search path. This causes many builds to fail.
287# See bug #4411 for more info. 411# See bug #4411 for more info.
288# 412#
289# To use, simply call:
290#
291# gen_usr_ldscript libfoo.so
292#
293# Note that you should in general use the unversioned name of 413# Note that you should in general use the unversioned name of
294# the library, as ldconfig should usually update it correctly 414# the library (libfoo.so), as ldconfig should usually update it
295# to point to the latest version of the library present. 415# correctly to point to the latest version of the library present.
296_tc_gen_usr_ldscript() { 416gen_usr_ldscript() {
297 local lib libdir=$(get_libdir) output_format="" 417 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
418 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
419
420 tc-is-static-only && return
421
298 # Just make sure it exists 422 # Just make sure it exists
299 dodir /usr/${libdir} 423 dodir /usr/${libdir}
424
425 if [[ $1 == "-a" ]] ; then
426 auto=true
427 shift
428 dodir /${libdir}
429 fi
300 430
301 # OUTPUT_FORMAT gives hints to the linker as to what binary format 431 # OUTPUT_FORMAT gives hints to the linker as to what binary format
302 # is referenced ... makes multilib saner 432 # is referenced ... makes multilib saner
303 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p') 433 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
304 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )" 434 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
305 435
306 for lib in "$@" ; do 436 for lib in "$@" ; do
307 if [[ ${USERLAND} == "Darwin" ]] ; then 437 local tlib
308 ewarn "Not creating fake dynamic library for $lib on Darwin;" 438 if ${auto} ; then
309 ewarn "making a symlink instead." 439 lib="lib${lib}${suffix}"
310 dosym "/${libdir}/${lib}" "/usr/${libdir}/${lib}"
311 else 440 else
441 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
442 # This especially is for AIX where $(get_libname) can return ".a",
443 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
444 [[ -r ${ED}/${libdir}/${lib} ]] || continue
445 #TODO: better die here?
446 fi
447
448 case ${CTARGET:-${CHOST}} in
449 *-darwin*)
450 if ${auto} ; then
451 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
452 else
453 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
454 fi
455 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
456 tlib=${tlib##*/}
457
458 if ${auto} ; then
459 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
460 # some install_names are funky: they encode a version
461 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
462 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
463 fi
464 rm -f "${ED}"/${libdir}/${lib}
465 fi
466
467 # Mach-O files have an id, which is like a soname, it tells how
468 # another object linking against this lib should reference it.
469 # Since we moved the lib from usr/lib into lib this reference is
470 # wrong. Hence, we update it here. We don't configure with
471 # libdir=/lib because that messes up libtool files.
472 # Make sure we don't lose the specific version, so just modify the
473 # existing install_name
474 install_name_tool \
475 -id "${EPREFIX}"/${libdir}/${tlib} \
476 "${ED}"/${libdir}/${tlib}
477 # Now as we don't use GNU binutils and our linker doesn't
478 # understand linker scripts, just create a symlink.
479 pushd "${ED}/usr/${libdir}" > /dev/null
480 ln -snf "../../${libdir}/${tlib}" "${lib}"
481 popd > /dev/null
482 ;;
483 *-aix*|*-irix*|*-hpux*|*-interix*|*-winnt*)
484 if ${auto} ; then
485 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
486 # no way to retrieve soname on these platforms (?)
487 tlib=$(readlink "${ED}"/${libdir}/${lib})
488 tlib=${tlib##*/}
489 if [[ -z ${tlib} ]] ; then
490 # ok, apparently was not a symlink, don't remove it and
491 # just link to it
492 tlib=${lib}
493 else
494 rm -f "${ED}"/${libdir}/${lib}
495 fi
496 else
497 tlib=${lib}
498 fi
499
500 # we don't have GNU binutils on these platforms, so we symlink
501 # instead, which seems to work fine. Keep it relative, otherwise
502 # we break some QA checks in Portage
503 # on interix, the linker scripts would work fine in _most_
504 # situations. if a library links to such a linker script the
505 # absolute path to the correct library is inserted into the binary,
506 # which is wrong, since anybody linking _without_ libtool will miss
507 # some dependencies, since the stupid linker cannot find libraries
508 # hardcoded with absolute paths (as opposed to the loader, which
509 # seems to be able to do this).
510 # this has been seen while building shared-mime-info which needs
511 # libxml2, but links without libtool (and does not add libz to the
512 # command line by itself).
513 pushd "${ED}/usr/${libdir}" > /dev/null
514 ln -snf "../../${libdir}/${tlib}" "${lib}"
515 popd > /dev/null
516 ;;
517 *)
518 if ${auto} ; then
519 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
520 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
521 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
522 # some SONAMEs are funky: they encode a version before the .so
523 if [[ ${tlib} != ${lib}* ]] ; then
524 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
525 fi
526 rm -f "${ED}"/${libdir}/${lib}
527 else
528 tlib=${lib}
529 fi
312 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT 530 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
313 /* GNU ld script 531 /* GNU ld script
314 Since Gentoo has critical dynamic libraries 532 Since Gentoo has critical dynamic libraries in /lib, and the static versions
315 in /lib, and the static versions in /usr/lib, 533 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
316 we need to have a "fake" dynamic lib in /usr/lib, 534 run into linking problems. This "fake" dynamic lib is a linker script that
317 otherwise we run into linking problems. 535 redirects the linker to the real lib. And yes, this works in the cross-
536 compiling scenario as the sysroot-ed linker will prepend the real path.
318 537
319 See bug http://bugs.gentoo.org/4411 for more info. 538 See bug http://bugs.gentoo.org/4411 for more info.
320 */ 539 */
321 ${output_format} 540 ${output_format}
322 GROUP ( /${libdir}/${lib} ) 541 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
323 END_LDSCRIPT 542 END_LDSCRIPT
324 fi 543 ;;
544 esac
325 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}" 545 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
326 done 546 done
327} 547}
328gen_usr_ldscript() { _tc_gen_usr_ldscript "$@" ; }

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