/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.96 - (show annotations) (download)
Fri Nov 27 21:31:29 2009 UTC (4 years, 9 months ago) by vapier
Branch: MAIN
Changes since 1.95: +5 -1 lines
start a tc-get helper for pkg-config

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 1.95 2009/09/02 20:08:31 grobian 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
96 # @FUNCTION: tc-getBUILD_CC
97 # @USAGE: [toolchain prefix]
98 # @RETURN: name of the C compiler for building binaries to run on the build machine
99 tc-getBUILD_CC() {
100 local v
101 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
102 if [[ -n ${!v} ]] ; then
103 export BUILD_CC=${!v}
104 echo "${!v}"
105 return 0
106 fi
107 done
108
109 local search=
110 if [[ -n ${CBUILD} ]] ; then
111 search=$(type -p ${CBUILD}-gcc)
112 search=${search##*/}
113 fi
114 search=${search:-gcc}
115
116 export BUILD_CC=${search}
117 echo "${search}"
118 }
119
120 # @FUNCTION: tc-export
121 # @USAGE: <list of toolchain variables>
122 # @DESCRIPTION:
123 # Quick way to export a bunch of compiler vars at once.
124 tc-export() {
125 local var
126 for var in "$@" ; do
127 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
128 eval tc-get${var} > /dev/null
129 done
130 }
131
132 # @FUNCTION: tc-is-cross-compiler
133 # @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
134 tc-is-cross-compiler() {
135 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
136 }
137
138 # @FUNCTION: tc-is-softfloat
139 # @DESCRIPTION:
140 # See if this toolchain is a softfloat based one.
141 # @CODE
142 # The possible return values:
143 # - only: the target is always softfloat (never had fpu)
144 # - yes: the target should support softfloat
145 # - no: the target should support hardfloat
146 # @CODE
147 # This allows us to react differently where packages accept
148 # softfloat flags in the case where support is optional, but
149 # rejects softfloat flags where the target always lacks an fpu.
150 tc-is-softfloat() {
151 case ${CTARGET} in
152 bfin*|h8300*)
153 echo "only" ;;
154 *)
155 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
156 && echo "yes" \
157 || echo "no"
158 ;;
159 esac
160 }
161
162 # @FUNCTION: tc-is-static-only
163 # @DESCRIPTION:
164 # Return shell true if the target does not support shared libs, shell false
165 # otherwise.
166 tc-is-static-only() {
167 local host=${CTARGET:-${CHOST}}
168
169 # *MiNT doesn't have shared libraries, only platform so far
170 return $([[ ${host} == *-mint* ]])
171 }
172
173
174 # Parse information from CBUILD/CHOST/CTARGET rather than
175 # use external variables from the profile.
176 tc-ninja_magic_to_arch() {
177 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
178
179 local type=$1
180 local host=$2
181 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
182
183 case ${host} in
184 alpha*) echo alpha;;
185 arm*) echo arm;;
186 avr*) ninj avr32 avr;;
187 bfin*) ninj blackfin bfin;;
188 cris*) echo cris;;
189 hppa*) ninj parisc hppa;;
190 i?86*)
191 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
192 # trees have been unified into 'x86'.
193 # FreeBSD still uses i386
194 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
195 echo i386
196 else
197 echo x86
198 fi
199 ;;
200 ia64*) echo ia64;;
201 m68*) echo m68k;;
202 mips*) echo mips;;
203 nios2*) echo nios2;;
204 nios*) echo nios;;
205 powerpc*)
206 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
207 # have been unified into simply 'powerpc', but until 2.6.16,
208 # ppc32 is still using ARCH="ppc" as default
209 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
210 echo powerpc
211 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
212 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
213 echo powerpc
214 else
215 echo ppc
216 fi
217 elif [[ ${host} == powerpc64* ]] ; then
218 echo ppc64
219 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
220 ninj ppc64 ppc
221 else
222 echo ppc
223 fi
224 ;;
225 s390*) echo s390;;
226 sh64*) ninj sh64 sh;;
227 sh*) echo sh;;
228 sparc64*) ninj sparc64 sparc;;
229 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
230 && ninj sparc64 sparc \
231 || echo sparc
232 ;;
233 vax*) echo vax;;
234 x86_64*)
235 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
236 # trees have been unified into 'x86'.
237 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
238 echo x86
239 else
240 ninj x86_64 amd64
241 fi
242 ;;
243
244 # since our usage of tc-arch is largely concerned with
245 # normalizing inputs for testing ${CTARGET}, let's filter
246 # other cross targets (mingw and such) into the unknown.
247 *) echo unknown;;
248 esac
249 }
250 # @FUNCTION: tc-arch-kernel
251 # @USAGE: [toolchain prefix]
252 # @RETURN: name of the kernel arch according to the compiler target
253 tc-arch-kernel() {
254 tc-ninja_magic_to_arch kern "$@"
255 }
256 # @FUNCTION: tc-arch
257 # @USAGE: [toolchain prefix]
258 # @RETURN: name of the portage arch according to the compiler target
259 tc-arch() {
260 tc-ninja_magic_to_arch portage "$@"
261 }
262
263 tc-endian() {
264 local host=$1
265 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
266 host=${host%%-*}
267
268 case ${host} in
269 alpha*) echo big;;
270 arm*b*) echo big;;
271 arm*) echo little;;
272 cris*) echo little;;
273 hppa*) echo big;;
274 i?86*) echo little;;
275 ia64*) echo little;;
276 m68*) echo big;;
277 mips*l*) echo little;;
278 mips*) echo big;;
279 powerpc*) echo big;;
280 s390*) echo big;;
281 sh*b*) echo big;;
282 sh*) echo little;;
283 sparc*) echo big;;
284 x86_64*) echo little;;
285 *) echo wtf;;
286 esac
287 }
288
289 # @FUNCTION: gcc-fullversion
290 # @RETURN: compiler version (major.minor.micro: [3.4.6])
291 gcc-fullversion() {
292 $(tc-getCC "$@") -dumpversion
293 }
294 # @FUNCTION: gcc-version
295 # @RETURN: compiler version (major.minor: [3.4].6)
296 gcc-version() {
297 gcc-fullversion "$@" | cut -f1,2 -d.
298 }
299 # @FUNCTION: gcc-major-version
300 # @RETURN: major compiler version (major: [3].4.6)
301 gcc-major-version() {
302 gcc-version "$@" | cut -f1 -d.
303 }
304 # @FUNCTION: gcc-minor-version
305 # @RETURN: minor compiler version (minor: 3.[4].6)
306 gcc-minor-version() {
307 gcc-version "$@" | cut -f2 -d.
308 }
309 # @FUNCTION: gcc-micro-version
310 # @RETURN: micro compiler version (micro: 3.4.[6])
311 gcc-micro-version() {
312 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
313 }
314
315 # Returns the installation directory - internal toolchain
316 # function for use by _gcc-specs-exists (for flag-o-matic).
317 _gcc-install-dir() {
318 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
319 awk '$1=="install:" {print $2}')"
320 }
321 # Returns true if the indicated specs file exists - internal toolchain
322 # function for use by flag-o-matic.
323 _gcc-specs-exists() {
324 [[ -f $(_gcc-install-dir)/$1 ]]
325 }
326
327 # Returns requested gcc specs directive unprocessed - for used by
328 # gcc-specs-directive()
329 # Note; later specs normally overwrite earlier ones; however if a later
330 # spec starts with '+' then it appends.
331 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
332 # as "Reading <file>", in order. Strictly speaking, if there's a
333 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
334 # the same token anything from 'gcc -dumpspecs' is overridden by
335 # the contents of $(gcc_install_dir)/specs so the result is the
336 # same either way.
337 _gcc-specs-directive_raw() {
338 local cc=$(tc-getCC)
339 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
340 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
341 'BEGIN { pspec=""; spec=""; outside=1 }
342 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
343 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
344 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
345 { spec=spec $0 }
346 END { print spec }'
347 return 0
348 }
349
350 # Return the requested gcc specs directive, with all included
351 # specs expanded.
352 # Note, it does not check for inclusion loops, which cause it
353 # to never finish - but such loops are invalid for gcc and we're
354 # assuming gcc is operational.
355 gcc-specs-directive() {
356 local directive subdname subdirective
357 directive="$(_gcc-specs-directive_raw $1)"
358 while [[ ${directive} == *%\(*\)* ]]; do
359 subdname=${directive/*%\(}
360 subdname=${subdname/\)*}
361 subdirective="$(_gcc-specs-directive_raw ${subdname})"
362 directive="${directive//\%(${subdname})/${subdirective}}"
363 done
364 echo "${directive}"
365 return 0
366 }
367
368 # Returns true if gcc sets relro
369 gcc-specs-relro() {
370 local directive
371 directive=$(gcc-specs-directive link_command)
372 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
373 }
374 # Returns true if gcc sets now
375 gcc-specs-now() {
376 local directive
377 directive=$(gcc-specs-directive link_command)
378 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
379 }
380 # Returns true if gcc builds PIEs
381 gcc-specs-pie() {
382 local directive
383 directive=$(gcc-specs-directive cc1)
384 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
385 }
386 # Returns true if gcc builds with the stack protector
387 gcc-specs-ssp() {
388 local directive
389 directive=$(gcc-specs-directive cc1)
390 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
391 }
392 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
393 gcc-specs-ssp-to-all() {
394 local directive
395 directive=$(gcc-specs-directive cc1)
396 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
397 }
398 # Returns true if gcc builds with fno-strict-overflow
399 gcc-specs-nostrict() {
400 local directive
401 directive=$(gcc-specs-directive cc1)
402 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
403 }
404
405
406 # @FUNCTION: gen_usr_ldscript
407 # @USAGE: [-a] <list of libs to create linker scripts for>
408 # @DESCRIPTION:
409 # This function generate linker scripts in /usr/lib for dynamic
410 # libs in /lib. This is to fix linking problems when you have
411 # the .so in /lib, and the .a in /usr/lib. What happens is that
412 # in some cases when linking dynamic, the .a in /usr/lib is used
413 # instead of the .so in /lib due to gcc/libtool tweaking ld's
414 # library search path. This causes many builds to fail.
415 # See bug #4411 for more info.
416 #
417 # Note that you should in general use the unversioned name of
418 # the library (libfoo.so), as ldconfig should usually update it
419 # correctly to point to the latest version of the library present.
420 gen_usr_ldscript() {
421 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
422 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
423
424 tc-is-static-only && return
425
426 # Just make sure it exists
427 dodir /usr/${libdir}
428
429 if [[ $1 == "-a" ]] ; then
430 auto=true
431 shift
432 dodir /${libdir}
433 fi
434
435 # OUTPUT_FORMAT gives hints to the linker as to what binary format
436 # is referenced ... makes multilib saner
437 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
438 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
439
440 for lib in "$@" ; do
441 local tlib
442 if ${auto} ; then
443 lib="lib${lib}${suffix}"
444 else
445 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
446 # This especially is for AIX where $(get_libname) can return ".a",
447 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
448 [[ -r ${ED}/${libdir}/${lib} ]] || continue
449 #TODO: better die here?
450 fi
451
452 case ${CTARGET:-${CHOST}} in
453 *-darwin*)
454 if ${auto} ; then
455 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
456 else
457 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
458 fi
459 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
460 tlib=${tlib##*/}
461
462 if ${auto} ; then
463 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
464 # some install_names are funky: they encode a version
465 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
466 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
467 fi
468 rm -f "${ED}"/${libdir}/${lib}
469 fi
470
471 # Mach-O files have an id, which is like a soname, it tells how
472 # another object linking against this lib should reference it.
473 # Since we moved the lib from usr/lib into lib this reference is
474 # wrong. Hence, we update it here. We don't configure with
475 # libdir=/lib because that messes up libtool files.
476 # Make sure we don't lose the specific version, so just modify the
477 # existing install_name
478 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
479 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
480 local nowrite=yes
481 fi
482 install_name_tool \
483 -id "${EPREFIX}"/${libdir}/${tlib} \
484 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
485 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
486 # Now as we don't use GNU binutils and our linker doesn't
487 # understand linker scripts, just create a symlink.
488 pushd "${ED}/usr/${libdir}" > /dev/null
489 ln -snf "../../${libdir}/${tlib}" "${lib}"
490 popd > /dev/null
491 ;;
492 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
493 if ${auto} ; then
494 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
495 # no way to retrieve soname on these platforms (?)
496 tlib=$(readlink "${ED}"/${libdir}/${lib})
497 tlib=${tlib##*/}
498 if [[ -z ${tlib} ]] ; then
499 # ok, apparently was not a symlink, don't remove it and
500 # just link to it
501 tlib=${lib}
502 else
503 rm -f "${ED}"/${libdir}/${lib}
504 fi
505 else
506 tlib=${lib}
507 fi
508
509 # we don't have GNU binutils on these platforms, so we symlink
510 # instead, which seems to work fine. Keep it relative, otherwise
511 # we break some QA checks in Portage
512 # on interix, the linker scripts would work fine in _most_
513 # situations. if a library links to such a linker script the
514 # absolute path to the correct library is inserted into the binary,
515 # which is wrong, since anybody linking _without_ libtool will miss
516 # some dependencies, since the stupid linker cannot find libraries
517 # hardcoded with absolute paths (as opposed to the loader, which
518 # seems to be able to do this).
519 # this has been seen while building shared-mime-info which needs
520 # libxml2, but links without libtool (and does not add libz to the
521 # command line by itself).
522 pushd "${ED}/usr/${libdir}" > /dev/null
523 ln -snf "../../${libdir}/${tlib}" "${lib}"
524 popd > /dev/null
525 ;;
526 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
527 if ${auto} ; then
528 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
529 [[ -z ${tlib} ]] && tlib=${lib}
530 tlib=${tlib##*/} # 'internal name' can have a path component
531 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
532 # some SONAMEs are funky: they encode a version before the .so
533 if [[ ${tlib} != ${lib}* ]] ; then
534 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
535 fi
536 [[ ${tlib} != ${lib} ]] &&
537 rm -f "${ED}"/${libdir}/${lib}
538 else
539 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
540 [[ -z ${tlib} ]] && tlib=${lib}
541 tlib=${tlib##*/} # 'internal name' can have a path component
542 fi
543 pushd "${ED}"/usr/${libdir} >/dev/null
544 ln -snf "../../${libdir}/${tlib}" "${lib}"
545 # need the internal name in usr/lib too, to be available at runtime
546 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
547 [[ ${tlib} != ${lib} ]] &&
548 ln -snf "../../${libdir}/${tlib}" "${tlib}"
549 popd >/dev/null
550 ;;
551 *)
552 if ${auto} ; then
553 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
554 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
555 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
556 # some SONAMEs are funky: they encode a version before the .so
557 if [[ ${tlib} != ${lib}* ]] ; then
558 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
559 fi
560 rm -f "${ED}"/${libdir}/${lib}
561 else
562 tlib=${lib}
563 fi
564 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
565 /* GNU ld script
566 Since Gentoo has critical dynamic libraries in /lib, and the static versions
567 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
568 run into linking problems. This "fake" dynamic lib is a linker script that
569 redirects the linker to the real lib. And yes, this works in the cross-
570 compiling scenario as the sysroot-ed linker will prepend the real path.
571
572 See bug http://bugs.gentoo.org/4411 for more info.
573 */
574 ${output_format}
575 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
576 END_LDSCRIPT
577 ;;
578 esac
579 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
580 done
581 }

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