/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.98 - (show annotations) (download)
Mon Mar 15 23:51:14 2010 UTC (4 years, 9 months ago) by vapier
Branch: MAIN
Changes since 1.97: +9 -1 lines
tc-get{RC,DLLWRAP}: new helper functions for dealing with Windows toolchains

1 # Copyright 1999-2007 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.97 2009/12/01 04:44:17 vapier Exp $
4
5 # @ECLASS: toolchain-funcs.eclass
6 # @MAINTAINER:
7 # Toolchain Ninjas <toolchain@gentoo.org>
8 # @BLURB: functions to query common info about the toolchain
9 # @DESCRIPTION:
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.
15
16 ___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
17 [[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
18
19 DESCRIPTION="Based on the ${ECLASS} eclass"
20
21 tc-getPROG() {
22 local var=$1
23 local prog=$2
24
25 if [[ -n ${!var} ]] ; then
26 echo "${!var}"
27 return 0
28 fi
29
30 local search=
31 [[ -n $3 ]] && search=$(type -p "$3-${prog}")
32 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
33 [[ -n ${search} ]] && prog=${search##*/}
34
35 export ${var}=${prog}
36 echo "${!var}"
37 }
38
39 # @FUNCTION: tc-getAR
40 # @USAGE: [toolchain prefix]
41 # @RETURN: name of the archiver
42 tc-getAR() { tc-getPROG AR ar "$@"; }
43 # @FUNCTION: tc-getAS
44 # @USAGE: [toolchain prefix]
45 # @RETURN: name of the assembler
46 tc-getAS() { tc-getPROG AS as "$@"; }
47 # @FUNCTION: tc-getCC
48 # @USAGE: [toolchain prefix]
49 # @RETURN: name of the C compiler
50 tc-getCC() { tc-getPROG CC gcc "$@"; }
51 # @FUNCTION: tc-getCPP
52 # @USAGE: [toolchain prefix]
53 # @RETURN: name of the C preprocessor
54 tc-getCPP() { tc-getPROG CPP cpp "$@"; }
55 # @FUNCTION: tc-getCXX
56 # @USAGE: [toolchain prefix]
57 # @RETURN: name of the C++ compiler
58 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
59 # @FUNCTION: tc-getLD
60 # @USAGE: [toolchain prefix]
61 # @RETURN: name of the linker
62 tc-getLD() { tc-getPROG LD ld "$@"; }
63 # @FUNCTION: tc-getSTRIP
64 # @USAGE: [toolchain prefix]
65 # @RETURN: name of the strip program
66 tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
67 # @FUNCTION: tc-getNM
68 # @USAGE: [toolchain prefix]
69 # @RETURN: name of the symbol/object thingy
70 tc-getNM() { tc-getPROG NM nm "$@"; }
71 # @FUNCTION: tc-getRANLIB
72 # @USAGE: [toolchain prefix]
73 # @RETURN: name of the archiver indexer
74 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
75 # @FUNCTION: tc-getOBJCOPY
76 # @USAGE: [toolchain prefix]
77 # @RETURN: name of the object copier
78 tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
79 # @FUNCTION: tc-getF77
80 # @USAGE: [toolchain prefix]
81 # @RETURN: name of the Fortran 77 compiler
82 tc-getF77() { tc-getPROG F77 f77 "$@"; }
83 # @FUNCTION: tc-getFC
84 # @USAGE: [toolchain prefix]
85 # @RETURN: name of the Fortran 90 compiler
86 tc-getFC() { tc-getPROG FC gfortran "$@"; }
87 # @FUNCTION: tc-getGCJ
88 # @USAGE: [toolchain prefix]
89 # @RETURN: name of the java compiler
90 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
91 # @FUNCTION: tc-getPKG_CONFIG
92 # @USAGE: [toolchain prefix]
93 # @RETURN: name of the pkg-config tool
94 tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
95 # @FUNCTION: tc-getRC
96 # @USAGE: [toolchain prefix]
97 # @RETURN: name of the Windows resource compiler
98 tc-getRC() { tc-getPROG RC windres "$@"; }
99 # @FUNCTION: tc-getDLLWRAP
100 # @USAGE: [toolchain prefix]
101 # @RETURN: name of the Windows dllwrap utility
102 tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
103
104 # @FUNCTION: tc-getBUILD_CC
105 # @USAGE: [toolchain prefix]
106 # @RETURN: name of the C compiler for building binaries to run on the build machine
107 tc-getBUILD_CC() {
108 local v
109 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
110 if [[ -n ${!v} ]] ; then
111 export BUILD_CC=${!v}
112 echo "${!v}"
113 return 0
114 fi
115 done
116
117 local search=
118 if [[ -n ${CBUILD} ]] ; then
119 search=$(type -p ${CBUILD}-gcc)
120 search=${search##*/}
121 fi
122 search=${search:-gcc}
123
124 export BUILD_CC=${search}
125 echo "${search}"
126 }
127
128 # @FUNCTION: tc-export
129 # @USAGE: <list of toolchain variables>
130 # @DESCRIPTION:
131 # Quick way to export a bunch of compiler vars at once.
132 tc-export() {
133 local var
134 for var in "$@" ; do
135 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
136 eval tc-get${var} > /dev/null
137 done
138 }
139
140 # @FUNCTION: tc-is-cross-compiler
141 # @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
142 tc-is-cross-compiler() {
143 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
144 }
145
146 # @FUNCTION: tc-is-softfloat
147 # @DESCRIPTION:
148 # See if this toolchain is a softfloat based one.
149 # @CODE
150 # The possible return values:
151 # - only: the target is always softfloat (never had fpu)
152 # - yes: the target should support softfloat
153 # - no: the target should support hardfloat
154 # @CODE
155 # This allows us to react differently where packages accept
156 # softfloat flags in the case where support is optional, but
157 # rejects softfloat flags where the target always lacks an fpu.
158 tc-is-softfloat() {
159 case ${CTARGET} in
160 bfin*|h8300*)
161 echo "only" ;;
162 *)
163 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
164 && echo "yes" \
165 || echo "no"
166 ;;
167 esac
168 }
169
170 # @FUNCTION: tc-is-static-only
171 # @DESCRIPTION:
172 # Return shell true if the target does not support shared libs, shell false
173 # otherwise.
174 tc-is-static-only() {
175 local host=${CTARGET:-${CHOST}}
176
177 # *MiNT doesn't have shared libraries, only platform so far
178 return $([[ ${host} == *-mint* ]])
179 }
180
181 # @FUNCTION: tc-has-tls
182 # @USAGE: [-s|-c|-l] [toolchain prefix]
183 # @DESCRIPTION:
184 # See if the toolchain supports thread local storage (TLS). Use -s to test the
185 # compiler, -c to also test the assembler, and -l to also test the C library
186 # (the default).
187 tc-has-tls() {
188 local base="${T}/test-tc-tls"
189 cat <<-EOF > "${base}.c"
190 int foo(int *i) {
191 static __thread int j = 0;
192 return *i ? j : *i;
193 }
194 EOF
195 local flags
196 case $1 in
197 -s) flags="-S";;
198 -c) flags="-c";;
199 -l) ;;
200 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
201 esac
202 : ${flags:=-fPIC -shared -Wl,-z,defs}
203 [[ $1 == -* ]] && shift
204 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
205 local ret=$?
206 rm -f "${base}"*
207 return ${ret}
208 }
209
210
211 # Parse information from CBUILD/CHOST/CTARGET rather than
212 # use external variables from the profile.
213 tc-ninja_magic_to_arch() {
214 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
215
216 local type=$1
217 local host=$2
218 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
219
220 case ${host} in
221 alpha*) echo alpha;;
222 arm*) echo arm;;
223 avr*) ninj avr32 avr;;
224 bfin*) ninj blackfin bfin;;
225 cris*) echo cris;;
226 hppa*) ninj parisc hppa;;
227 i?86*)
228 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
229 # trees have been unified into 'x86'.
230 # FreeBSD still uses i386
231 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
232 echo i386
233 else
234 echo x86
235 fi
236 ;;
237 ia64*) echo ia64;;
238 m68*) echo m68k;;
239 mips*) echo mips;;
240 nios2*) echo nios2;;
241 nios*) echo nios;;
242 powerpc*)
243 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
244 # have been unified into simply 'powerpc', but until 2.6.16,
245 # ppc32 is still using ARCH="ppc" as default
246 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
247 echo powerpc
248 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
249 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
250 echo powerpc
251 else
252 echo ppc
253 fi
254 elif [[ ${host} == powerpc64* ]] ; then
255 echo ppc64
256 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
257 ninj ppc64 ppc
258 else
259 echo ppc
260 fi
261 ;;
262 s390*) echo s390;;
263 sh64*) ninj sh64 sh;;
264 sh*) echo sh;;
265 sparc64*) ninj sparc64 sparc;;
266 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
267 && ninj sparc64 sparc \
268 || echo sparc
269 ;;
270 vax*) echo vax;;
271 x86_64*)
272 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
273 # trees have been unified into 'x86'.
274 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
275 echo x86
276 else
277 ninj x86_64 amd64
278 fi
279 ;;
280
281 # since our usage of tc-arch is largely concerned with
282 # normalizing inputs for testing ${CTARGET}, let's filter
283 # other cross targets (mingw and such) into the unknown.
284 *) echo unknown;;
285 esac
286 }
287 # @FUNCTION: tc-arch-kernel
288 # @USAGE: [toolchain prefix]
289 # @RETURN: name of the kernel arch according to the compiler target
290 tc-arch-kernel() {
291 tc-ninja_magic_to_arch kern "$@"
292 }
293 # @FUNCTION: tc-arch
294 # @USAGE: [toolchain prefix]
295 # @RETURN: name of the portage arch according to the compiler target
296 tc-arch() {
297 tc-ninja_magic_to_arch portage "$@"
298 }
299
300 tc-endian() {
301 local host=$1
302 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
303 host=${host%%-*}
304
305 case ${host} in
306 alpha*) echo big;;
307 arm*b*) echo big;;
308 arm*) echo little;;
309 cris*) echo little;;
310 hppa*) echo big;;
311 i?86*) echo little;;
312 ia64*) echo little;;
313 m68*) echo big;;
314 mips*l*) echo little;;
315 mips*) echo big;;
316 powerpc*) echo big;;
317 s390*) echo big;;
318 sh*b*) echo big;;
319 sh*) echo little;;
320 sparc*) echo big;;
321 x86_64*) echo little;;
322 *) echo wtf;;
323 esac
324 }
325
326 # @FUNCTION: gcc-fullversion
327 # @RETURN: compiler version (major.minor.micro: [3.4.6])
328 gcc-fullversion() {
329 $(tc-getCC "$@") -dumpversion
330 }
331 # @FUNCTION: gcc-version
332 # @RETURN: compiler version (major.minor: [3.4].6)
333 gcc-version() {
334 gcc-fullversion "$@" | cut -f1,2 -d.
335 }
336 # @FUNCTION: gcc-major-version
337 # @RETURN: major compiler version (major: [3].4.6)
338 gcc-major-version() {
339 gcc-version "$@" | cut -f1 -d.
340 }
341 # @FUNCTION: gcc-minor-version
342 # @RETURN: minor compiler version (minor: 3.[4].6)
343 gcc-minor-version() {
344 gcc-version "$@" | cut -f2 -d.
345 }
346 # @FUNCTION: gcc-micro-version
347 # @RETURN: micro compiler version (micro: 3.4.[6])
348 gcc-micro-version() {
349 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
350 }
351
352 # Returns the installation directory - internal toolchain
353 # function for use by _gcc-specs-exists (for flag-o-matic).
354 _gcc-install-dir() {
355 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
356 awk '$1=="install:" {print $2}')"
357 }
358 # Returns true if the indicated specs file exists - internal toolchain
359 # function for use by flag-o-matic.
360 _gcc-specs-exists() {
361 [[ -f $(_gcc-install-dir)/$1 ]]
362 }
363
364 # Returns requested gcc specs directive unprocessed - for used by
365 # gcc-specs-directive()
366 # Note; later specs normally overwrite earlier ones; however if a later
367 # spec starts with '+' then it appends.
368 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
369 # as "Reading <file>", in order. Strictly speaking, if there's a
370 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
371 # the same token anything from 'gcc -dumpspecs' is overridden by
372 # the contents of $(gcc_install_dir)/specs so the result is the
373 # same either way.
374 _gcc-specs-directive_raw() {
375 local cc=$(tc-getCC)
376 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
377 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
378 'BEGIN { pspec=""; spec=""; outside=1 }
379 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
380 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
381 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
382 { spec=spec $0 }
383 END { print spec }'
384 return 0
385 }
386
387 # Return the requested gcc specs directive, with all included
388 # specs expanded.
389 # Note, it does not check for inclusion loops, which cause it
390 # to never finish - but such loops are invalid for gcc and we're
391 # assuming gcc is operational.
392 gcc-specs-directive() {
393 local directive subdname subdirective
394 directive="$(_gcc-specs-directive_raw $1)"
395 while [[ ${directive} == *%\(*\)* ]]; do
396 subdname=${directive/*%\(}
397 subdname=${subdname/\)*}
398 subdirective="$(_gcc-specs-directive_raw ${subdname})"
399 directive="${directive//\%(${subdname})/${subdirective}}"
400 done
401 echo "${directive}"
402 return 0
403 }
404
405 # Returns true if gcc sets relro
406 gcc-specs-relro() {
407 local directive
408 directive=$(gcc-specs-directive link_command)
409 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
410 }
411 # Returns true if gcc sets now
412 gcc-specs-now() {
413 local directive
414 directive=$(gcc-specs-directive link_command)
415 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
416 }
417 # Returns true if gcc builds PIEs
418 gcc-specs-pie() {
419 local directive
420 directive=$(gcc-specs-directive cc1)
421 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
422 }
423 # Returns true if gcc builds with the stack protector
424 gcc-specs-ssp() {
425 local directive
426 directive=$(gcc-specs-directive cc1)
427 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
428 }
429 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
430 gcc-specs-ssp-to-all() {
431 local directive
432 directive=$(gcc-specs-directive cc1)
433 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
434 }
435 # Returns true if gcc builds with fno-strict-overflow
436 gcc-specs-nostrict() {
437 local directive
438 directive=$(gcc-specs-directive cc1)
439 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
440 }
441
442
443 # @FUNCTION: gen_usr_ldscript
444 # @USAGE: [-a] <list of libs to create linker scripts for>
445 # @DESCRIPTION:
446 # This function generate linker scripts in /usr/lib for dynamic
447 # libs in /lib. This is to fix linking problems when you have
448 # the .so in /lib, and the .a in /usr/lib. What happens is that
449 # in some cases when linking dynamic, the .a in /usr/lib is used
450 # instead of the .so in /lib due to gcc/libtool tweaking ld's
451 # library search path. This causes many builds to fail.
452 # See bug #4411 for more info.
453 #
454 # Note that you should in general use the unversioned name of
455 # the library (libfoo.so), as ldconfig should usually update it
456 # correctly to point to the latest version of the library present.
457 gen_usr_ldscript() {
458 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
459 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
460
461 tc-is-static-only && return
462
463 # Just make sure it exists
464 dodir /usr/${libdir}
465
466 if [[ $1 == "-a" ]] ; then
467 auto=true
468 shift
469 dodir /${libdir}
470 fi
471
472 # OUTPUT_FORMAT gives hints to the linker as to what binary format
473 # is referenced ... makes multilib saner
474 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
475 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
476
477 for lib in "$@" ; do
478 local tlib
479 if ${auto} ; then
480 lib="lib${lib}${suffix}"
481 else
482 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
483 # This especially is for AIX where $(get_libname) can return ".a",
484 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
485 [[ -r ${ED}/${libdir}/${lib} ]] || continue
486 #TODO: better die here?
487 fi
488
489 case ${CTARGET:-${CHOST}} in
490 *-darwin*)
491 if ${auto} ; then
492 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
493 else
494 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
495 fi
496 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
497 tlib=${tlib##*/}
498
499 if ${auto} ; then
500 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
501 # some install_names are funky: they encode a version
502 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
503 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
504 fi
505 rm -f "${ED}"/${libdir}/${lib}
506 fi
507
508 # Mach-O files have an id, which is like a soname, it tells how
509 # another object linking against this lib should reference it.
510 # Since we moved the lib from usr/lib into lib this reference is
511 # wrong. Hence, we update it here. We don't configure with
512 # libdir=/lib because that messes up libtool files.
513 # Make sure we don't lose the specific version, so just modify the
514 # existing install_name
515 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
516 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
517 local nowrite=yes
518 fi
519 install_name_tool \
520 -id "${EPREFIX}"/${libdir}/${tlib} \
521 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
522 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
523 # Now as we don't use GNU binutils and our linker doesn't
524 # understand linker scripts, just create a symlink.
525 pushd "${ED}/usr/${libdir}" > /dev/null
526 ln -snf "../../${libdir}/${tlib}" "${lib}"
527 popd > /dev/null
528 ;;
529 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
530 if ${auto} ; then
531 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
532 # no way to retrieve soname on these platforms (?)
533 tlib=$(readlink "${ED}"/${libdir}/${lib})
534 tlib=${tlib##*/}
535 if [[ -z ${tlib} ]] ; then
536 # ok, apparently was not a symlink, don't remove it and
537 # just link to it
538 tlib=${lib}
539 else
540 rm -f "${ED}"/${libdir}/${lib}
541 fi
542 else
543 tlib=${lib}
544 fi
545
546 # we don't have GNU binutils on these platforms, so we symlink
547 # instead, which seems to work fine. Keep it relative, otherwise
548 # we break some QA checks in Portage
549 # on interix, the linker scripts would work fine in _most_
550 # situations. if a library links to such a linker script the
551 # absolute path to the correct library is inserted into the binary,
552 # which is wrong, since anybody linking _without_ libtool will miss
553 # some dependencies, since the stupid linker cannot find libraries
554 # hardcoded with absolute paths (as opposed to the loader, which
555 # seems to be able to do this).
556 # this has been seen while building shared-mime-info which needs
557 # libxml2, but links without libtool (and does not add libz to the
558 # command line by itself).
559 pushd "${ED}/usr/${libdir}" > /dev/null
560 ln -snf "../../${libdir}/${tlib}" "${lib}"
561 popd > /dev/null
562 ;;
563 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
564 if ${auto} ; then
565 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
566 [[ -z ${tlib} ]] && tlib=${lib}
567 tlib=${tlib##*/} # 'internal name' can have a path component
568 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
569 # some SONAMEs are funky: they encode a version before the .so
570 if [[ ${tlib} != ${lib}* ]] ; then
571 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
572 fi
573 [[ ${tlib} != ${lib} ]] &&
574 rm -f "${ED}"/${libdir}/${lib}
575 else
576 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
577 [[ -z ${tlib} ]] && tlib=${lib}
578 tlib=${tlib##*/} # 'internal name' can have a path component
579 fi
580 pushd "${ED}"/usr/${libdir} >/dev/null
581 ln -snf "../../${libdir}/${tlib}" "${lib}"
582 # need the internal name in usr/lib too, to be available at runtime
583 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
584 [[ ${tlib} != ${lib} ]] &&
585 ln -snf "../../${libdir}/${tlib}" "${tlib}"
586 popd >/dev/null
587 ;;
588 *)
589 if ${auto} ; then
590 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
591 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
592 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
593 # some SONAMEs are funky: they encode a version before the .so
594 if [[ ${tlib} != ${lib}* ]] ; then
595 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
596 fi
597 rm -f "${ED}"/${libdir}/${lib}
598 else
599 tlib=${lib}
600 fi
601 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
602 /* GNU ld script
603 Since Gentoo has critical dynamic libraries in /lib, and the static versions
604 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
605 run into linking problems. This "fake" dynamic lib is a linker script that
606 redirects the linker to the real lib. And yes, this works in the cross-
607 compiling scenario as the sysroot-ed linker will prepend the real path.
608
609 See bug http://bugs.gentoo.org/4411 for more info.
610 */
611 ${output_format}
612 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
613 END_LDSCRIPT
614 ;;
615 esac
616 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
617 done
618 }

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