/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.97 - (show annotations) (download)
Tue Dec 1 04:44:17 2009 UTC (5 years ago) by vapier
Branch: MAIN
Changes since 1.96: +30 -1 lines
tc-has-tls: new thread local storage test function

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 1.96 2009/11/27 21:31:29 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
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 $([[ ${host} == *-mint* ]])
171 }
172
173 # @FUNCTION: tc-has-tls
174 # @USAGE: [-s|-c|-l] [toolchain prefix]
175 # @DESCRIPTION:
176 # See if the toolchain supports thread local storage (TLS). Use -s to test the
177 # compiler, -c to also test the assembler, and -l to also test the C library
178 # (the default).
179 tc-has-tls() {
180 local base="${T}/test-tc-tls"
181 cat <<-EOF > "${base}.c"
182 int foo(int *i) {
183 static __thread int j = 0;
184 return *i ? j : *i;
185 }
186 EOF
187 local flags
188 case $1 in
189 -s) flags="-S";;
190 -c) flags="-c";;
191 -l) ;;
192 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
193 esac
194 : ${flags:=-fPIC -shared -Wl,-z,defs}
195 [[ $1 == -* ]] && shift
196 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
197 local ret=$?
198 rm -f "${base}"*
199 return ${ret}
200 }
201
202
203 # Parse information from CBUILD/CHOST/CTARGET rather than
204 # use external variables from the profile.
205 tc-ninja_magic_to_arch() {
206 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
207
208 local type=$1
209 local host=$2
210 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
211
212 case ${host} in
213 alpha*) echo alpha;;
214 arm*) echo arm;;
215 avr*) ninj avr32 avr;;
216 bfin*) ninj blackfin bfin;;
217 cris*) echo cris;;
218 hppa*) ninj parisc hppa;;
219 i?86*)
220 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
221 # trees have been unified into 'x86'.
222 # FreeBSD still uses i386
223 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
224 echo i386
225 else
226 echo x86
227 fi
228 ;;
229 ia64*) echo ia64;;
230 m68*) echo m68k;;
231 mips*) echo mips;;
232 nios2*) echo nios2;;
233 nios*) echo nios;;
234 powerpc*)
235 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
236 # have been unified into simply 'powerpc', but until 2.6.16,
237 # ppc32 is still using ARCH="ppc" as default
238 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
239 echo powerpc
240 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
241 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
242 echo powerpc
243 else
244 echo ppc
245 fi
246 elif [[ ${host} == powerpc64* ]] ; then
247 echo ppc64
248 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
249 ninj ppc64 ppc
250 else
251 echo ppc
252 fi
253 ;;
254 s390*) echo s390;;
255 sh64*) ninj sh64 sh;;
256 sh*) echo sh;;
257 sparc64*) ninj sparc64 sparc;;
258 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
259 && ninj sparc64 sparc \
260 || echo sparc
261 ;;
262 vax*) echo vax;;
263 x86_64*)
264 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
265 # trees have been unified into 'x86'.
266 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
267 echo x86
268 else
269 ninj x86_64 amd64
270 fi
271 ;;
272
273 # since our usage of tc-arch is largely concerned with
274 # normalizing inputs for testing ${CTARGET}, let's filter
275 # other cross targets (mingw and such) into the unknown.
276 *) echo unknown;;
277 esac
278 }
279 # @FUNCTION: tc-arch-kernel
280 # @USAGE: [toolchain prefix]
281 # @RETURN: name of the kernel arch according to the compiler target
282 tc-arch-kernel() {
283 tc-ninja_magic_to_arch kern "$@"
284 }
285 # @FUNCTION: tc-arch
286 # @USAGE: [toolchain prefix]
287 # @RETURN: name of the portage arch according to the compiler target
288 tc-arch() {
289 tc-ninja_magic_to_arch portage "$@"
290 }
291
292 tc-endian() {
293 local host=$1
294 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
295 host=${host%%-*}
296
297 case ${host} in
298 alpha*) echo big;;
299 arm*b*) echo big;;
300 arm*) echo little;;
301 cris*) echo little;;
302 hppa*) echo big;;
303 i?86*) echo little;;
304 ia64*) echo little;;
305 m68*) echo big;;
306 mips*l*) echo little;;
307 mips*) echo big;;
308 powerpc*) echo big;;
309 s390*) echo big;;
310 sh*b*) echo big;;
311 sh*) echo little;;
312 sparc*) echo big;;
313 x86_64*) echo little;;
314 *) echo wtf;;
315 esac
316 }
317
318 # @FUNCTION: gcc-fullversion
319 # @RETURN: compiler version (major.minor.micro: [3.4.6])
320 gcc-fullversion() {
321 $(tc-getCC "$@") -dumpversion
322 }
323 # @FUNCTION: gcc-version
324 # @RETURN: compiler version (major.minor: [3.4].6)
325 gcc-version() {
326 gcc-fullversion "$@" | cut -f1,2 -d.
327 }
328 # @FUNCTION: gcc-major-version
329 # @RETURN: major compiler version (major: [3].4.6)
330 gcc-major-version() {
331 gcc-version "$@" | cut -f1 -d.
332 }
333 # @FUNCTION: gcc-minor-version
334 # @RETURN: minor compiler version (minor: 3.[4].6)
335 gcc-minor-version() {
336 gcc-version "$@" | cut -f2 -d.
337 }
338 # @FUNCTION: gcc-micro-version
339 # @RETURN: micro compiler version (micro: 3.4.[6])
340 gcc-micro-version() {
341 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
342 }
343
344 # Returns the installation directory - internal toolchain
345 # function for use by _gcc-specs-exists (for flag-o-matic).
346 _gcc-install-dir() {
347 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
348 awk '$1=="install:" {print $2}')"
349 }
350 # Returns true if the indicated specs file exists - internal toolchain
351 # function for use by flag-o-matic.
352 _gcc-specs-exists() {
353 [[ -f $(_gcc-install-dir)/$1 ]]
354 }
355
356 # Returns requested gcc specs directive unprocessed - for used by
357 # gcc-specs-directive()
358 # Note; later specs normally overwrite earlier ones; however if a later
359 # spec starts with '+' then it appends.
360 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
361 # as "Reading <file>", in order. Strictly speaking, if there's a
362 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
363 # the same token anything from 'gcc -dumpspecs' is overridden by
364 # the contents of $(gcc_install_dir)/specs so the result is the
365 # same either way.
366 _gcc-specs-directive_raw() {
367 local cc=$(tc-getCC)
368 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
369 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
370 'BEGIN { pspec=""; spec=""; outside=1 }
371 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
372 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
373 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
374 { spec=spec $0 }
375 END { print spec }'
376 return 0
377 }
378
379 # Return the requested gcc specs directive, with all included
380 # specs expanded.
381 # Note, it does not check for inclusion loops, which cause it
382 # to never finish - but such loops are invalid for gcc and we're
383 # assuming gcc is operational.
384 gcc-specs-directive() {
385 local directive subdname subdirective
386 directive="$(_gcc-specs-directive_raw $1)"
387 while [[ ${directive} == *%\(*\)* ]]; do
388 subdname=${directive/*%\(}
389 subdname=${subdname/\)*}
390 subdirective="$(_gcc-specs-directive_raw ${subdname})"
391 directive="${directive//\%(${subdname})/${subdirective}}"
392 done
393 echo "${directive}"
394 return 0
395 }
396
397 # Returns true if gcc sets relro
398 gcc-specs-relro() {
399 local directive
400 directive=$(gcc-specs-directive link_command)
401 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
402 }
403 # Returns true if gcc sets now
404 gcc-specs-now() {
405 local directive
406 directive=$(gcc-specs-directive link_command)
407 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
408 }
409 # Returns true if gcc builds PIEs
410 gcc-specs-pie() {
411 local directive
412 directive=$(gcc-specs-directive cc1)
413 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
414 }
415 # Returns true if gcc builds with the stack protector
416 gcc-specs-ssp() {
417 local directive
418 directive=$(gcc-specs-directive cc1)
419 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
420 }
421 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
422 gcc-specs-ssp-to-all() {
423 local directive
424 directive=$(gcc-specs-directive cc1)
425 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
426 }
427 # Returns true if gcc builds with fno-strict-overflow
428 gcc-specs-nostrict() {
429 local directive
430 directive=$(gcc-specs-directive cc1)
431 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
432 }
433
434
435 # @FUNCTION: gen_usr_ldscript
436 # @USAGE: [-a] <list of libs to create linker scripts for>
437 # @DESCRIPTION:
438 # This function generate linker scripts in /usr/lib for dynamic
439 # libs in /lib. This is to fix linking problems when you have
440 # the .so in /lib, and the .a in /usr/lib. What happens is that
441 # in some cases when linking dynamic, the .a in /usr/lib is used
442 # instead of the .so in /lib due to gcc/libtool tweaking ld's
443 # library search path. This causes many builds to fail.
444 # See bug #4411 for more info.
445 #
446 # Note that you should in general use the unversioned name of
447 # the library (libfoo.so), as ldconfig should usually update it
448 # correctly to point to the latest version of the library present.
449 gen_usr_ldscript() {
450 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
451 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
452
453 tc-is-static-only && return
454
455 # Just make sure it exists
456 dodir /usr/${libdir}
457
458 if [[ $1 == "-a" ]] ; then
459 auto=true
460 shift
461 dodir /${libdir}
462 fi
463
464 # OUTPUT_FORMAT gives hints to the linker as to what binary format
465 # is referenced ... makes multilib saner
466 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
467 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
468
469 for lib in "$@" ; do
470 local tlib
471 if ${auto} ; then
472 lib="lib${lib}${suffix}"
473 else
474 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
475 # This especially is for AIX where $(get_libname) can return ".a",
476 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
477 [[ -r ${ED}/${libdir}/${lib} ]] || continue
478 #TODO: better die here?
479 fi
480
481 case ${CTARGET:-${CHOST}} in
482 *-darwin*)
483 if ${auto} ; then
484 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
485 else
486 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
487 fi
488 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
489 tlib=${tlib##*/}
490
491 if ${auto} ; then
492 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
493 # some install_names are funky: they encode a version
494 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
495 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
496 fi
497 rm -f "${ED}"/${libdir}/${lib}
498 fi
499
500 # Mach-O files have an id, which is like a soname, it tells how
501 # another object linking against this lib should reference it.
502 # Since we moved the lib from usr/lib into lib this reference is
503 # wrong. Hence, we update it here. We don't configure with
504 # libdir=/lib because that messes up libtool files.
505 # Make sure we don't lose the specific version, so just modify the
506 # existing install_name
507 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
508 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
509 local nowrite=yes
510 fi
511 install_name_tool \
512 -id "${EPREFIX}"/${libdir}/${tlib} \
513 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
514 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
515 # Now as we don't use GNU binutils and our linker doesn't
516 # understand linker scripts, just create a symlink.
517 pushd "${ED}/usr/${libdir}" > /dev/null
518 ln -snf "../../${libdir}/${tlib}" "${lib}"
519 popd > /dev/null
520 ;;
521 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
522 if ${auto} ; then
523 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
524 # no way to retrieve soname on these platforms (?)
525 tlib=$(readlink "${ED}"/${libdir}/${lib})
526 tlib=${tlib##*/}
527 if [[ -z ${tlib} ]] ; then
528 # ok, apparently was not a symlink, don't remove it and
529 # just link to it
530 tlib=${lib}
531 else
532 rm -f "${ED}"/${libdir}/${lib}
533 fi
534 else
535 tlib=${lib}
536 fi
537
538 # we don't have GNU binutils on these platforms, so we symlink
539 # instead, which seems to work fine. Keep it relative, otherwise
540 # we break some QA checks in Portage
541 # on interix, the linker scripts would work fine in _most_
542 # situations. if a library links to such a linker script the
543 # absolute path to the correct library is inserted into the binary,
544 # which is wrong, since anybody linking _without_ libtool will miss
545 # some dependencies, since the stupid linker cannot find libraries
546 # hardcoded with absolute paths (as opposed to the loader, which
547 # seems to be able to do this).
548 # this has been seen while building shared-mime-info which needs
549 # libxml2, but links without libtool (and does not add libz to the
550 # command line by itself).
551 pushd "${ED}/usr/${libdir}" > /dev/null
552 ln -snf "../../${libdir}/${tlib}" "${lib}"
553 popd > /dev/null
554 ;;
555 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
556 if ${auto} ; then
557 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
558 [[ -z ${tlib} ]] && tlib=${lib}
559 tlib=${tlib##*/} # 'internal name' can have a path component
560 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
561 # some SONAMEs are funky: they encode a version before the .so
562 if [[ ${tlib} != ${lib}* ]] ; then
563 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
564 fi
565 [[ ${tlib} != ${lib} ]] &&
566 rm -f "${ED}"/${libdir}/${lib}
567 else
568 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
569 [[ -z ${tlib} ]] && tlib=${lib}
570 tlib=${tlib##*/} # 'internal name' can have a path component
571 fi
572 pushd "${ED}"/usr/${libdir} >/dev/null
573 ln -snf "../../${libdir}/${tlib}" "${lib}"
574 # need the internal name in usr/lib too, to be available at runtime
575 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
576 [[ ${tlib} != ${lib} ]] &&
577 ln -snf "../../${libdir}/${tlib}" "${tlib}"
578 popd >/dev/null
579 ;;
580 *)
581 if ${auto} ; then
582 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
583 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
584 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
585 # some SONAMEs are funky: they encode a version before the .so
586 if [[ ${tlib} != ${lib}* ]] ; then
587 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
588 fi
589 rm -f "${ED}"/${libdir}/${lib}
590 else
591 tlib=${lib}
592 fi
593 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
594 /* GNU ld script
595 Since Gentoo has critical dynamic libraries in /lib, and the static versions
596 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
597 run into linking problems. This "fake" dynamic lib is a linker script that
598 redirects the linker to the real lib. And yes, this works in the cross-
599 compiling scenario as the sysroot-ed linker will prepend the real path.
600
601 See bug http://bugs.gentoo.org/4411 for more info.
602 */
603 ${output_format}
604 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
605 END_LDSCRIPT
606 ;;
607 esac
608 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
609 done
610 }

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