/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.102 - (show annotations) (download)
Sat Sep 11 17:12:20 2010 UTC (4 years, 3 months ago) by vapier
Branch: MAIN
Changes since 1.101: +15 -6 lines
convert gcc version funcs to query the preprocessor for its gcc version to work with different compilers #335943 by Ambroz Bizjak

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 1.101 2010/08/20 15:04:11 dberkholz 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 "$@"; }
79 # @FUNCTION: tc-getF77
80 # @USAGE: [toolchain prefix]
81 # @RETURN: name of the Fortran 77 compiler
82 tc-getF77() { tc-getPROG F77 gfortran "$@"; }
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 doesn't support softfloat
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-hardfloat
171 # @DESCRIPTION:
172 # See if this toolchain is a hardfloat based one.
173 # @CODE
174 # The possible return values:
175 # - yes: the target should support hardfloat
176 # - no: the target doesn't support hardfloat
177 tc-is-hardfloat() {
178 [[ ${CTARGET//_/-} == *-hardfloat-* ]] \
179 && echo "yes" \
180 || echo "no"
181 }
182
183 # @FUNCTION: tc-is-static-only
184 # @DESCRIPTION:
185 # Return shell true if the target does not support shared libs, shell false
186 # otherwise.
187 tc-is-static-only() {
188 local host=${CTARGET:-${CHOST}}
189
190 # *MiNT doesn't have shared libraries, only platform so far
191 return $([[ ${host} == *-mint* ]])
192 }
193
194 # @FUNCTION: tc-has-openmp
195 # @USAGE: [toolchain prefix]
196 # @DESCRIPTION:
197 # See if the toolchain supports OpenMP.
198 tc-has-openmp() {
199 local base="${T}/test-tc-openmp"
200 cat <<-EOF > "${base}.c"
201 #include <omp.h>
202 int main() {
203 int nthreads, tid, ret = 0;
204 #pragma omp parallel private(nthreads, tid)
205 {
206 tid = omp_get_thread_num();
207 nthreads = omp_get_num_threads(); ret += tid + nthreads;
208 }
209 return ret;
210 }
211 EOF
212 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
213 local ret=$?
214 rm -f "${base}"*
215 return ${ret}
216 }
217
218 # @FUNCTION: tc-has-tls
219 # @USAGE: [-s|-c|-l] [toolchain prefix]
220 # @DESCRIPTION:
221 # See if the toolchain supports thread local storage (TLS). Use -s to test the
222 # compiler, -c to also test the assembler, and -l to also test the C library
223 # (the default).
224 tc-has-tls() {
225 local base="${T}/test-tc-tls"
226 cat <<-EOF > "${base}.c"
227 int foo(int *i) {
228 static __thread int j = 0;
229 return *i ? j : *i;
230 }
231 EOF
232 local flags
233 case $1 in
234 -s) flags="-S";;
235 -c) flags="-c";;
236 -l) ;;
237 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
238 esac
239 : ${flags:=-fPIC -shared -Wl,-z,defs}
240 [[ $1 == -* ]] && shift
241 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
242 local ret=$?
243 rm -f "${base}"*
244 return ${ret}
245 }
246
247
248 # Parse information from CBUILD/CHOST/CTARGET rather than
249 # use external variables from the profile.
250 tc-ninja_magic_to_arch() {
251 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
252
253 local type=$1
254 local host=$2
255 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
256
257 case ${host} in
258 alpha*) echo alpha;;
259 arm*) echo arm;;
260 avr*) ninj avr32 avr;;
261 bfin*) ninj blackfin bfin;;
262 cris*) echo cris;;
263 hppa*) ninj parisc hppa;;
264 i?86*)
265 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
266 # trees have been unified into 'x86'.
267 # FreeBSD still uses i386
268 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
269 echo i386
270 else
271 echo x86
272 fi
273 ;;
274 ia64*) echo ia64;;
275 m68*) echo m68k;;
276 mips*) echo mips;;
277 nios2*) echo nios2;;
278 nios*) echo nios;;
279 powerpc*)
280 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
281 # have been unified into simply 'powerpc', but until 2.6.16,
282 # ppc32 is still using ARCH="ppc" as default
283 if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
284 echo powerpc
285 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
286 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
287 echo powerpc
288 else
289 echo ppc
290 fi
291 elif [[ ${host} == powerpc64* ]] ; then
292 echo ppc64
293 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
294 ninj ppc64 ppc
295 else
296 echo ppc
297 fi
298 ;;
299 s390*) echo s390;;
300 sh64*) ninj sh64 sh;;
301 sh*) echo sh;;
302 sparc64*) ninj sparc64 sparc;;
303 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
304 && ninj sparc64 sparc \
305 || echo sparc
306 ;;
307 vax*) echo vax;;
308 x86_64*)
309 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
310 # trees have been unified into 'x86'.
311 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
312 echo x86
313 else
314 ninj x86_64 amd64
315 fi
316 ;;
317
318 # since our usage of tc-arch is largely concerned with
319 # normalizing inputs for testing ${CTARGET}, let's filter
320 # other cross targets (mingw and such) into the unknown.
321 *) echo unknown;;
322 esac
323 }
324 # @FUNCTION: tc-arch-kernel
325 # @USAGE: [toolchain prefix]
326 # @RETURN: name of the kernel arch according to the compiler target
327 tc-arch-kernel() {
328 tc-ninja_magic_to_arch kern "$@"
329 }
330 # @FUNCTION: tc-arch
331 # @USAGE: [toolchain prefix]
332 # @RETURN: name of the portage arch according to the compiler target
333 tc-arch() {
334 tc-ninja_magic_to_arch portage "$@"
335 }
336
337 tc-endian() {
338 local host=$1
339 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
340 host=${host%%-*}
341
342 case ${host} in
343 alpha*) echo big;;
344 arm*b*) echo big;;
345 arm*) echo little;;
346 cris*) echo little;;
347 hppa*) echo big;;
348 i?86*) echo little;;
349 ia64*) echo little;;
350 m68*) echo big;;
351 mips*l*) echo little;;
352 mips*) echo big;;
353 powerpc*) echo big;;
354 s390*) echo big;;
355 sh*b*) echo big;;
356 sh*) echo little;;
357 sparc*) echo big;;
358 x86_64*) echo little;;
359 *) echo wtf;;
360 esac
361 }
362
363 # Internal func. The first argument is the version info to expand.
364 # Query the preprocessor to improve compatibility across different
365 # compilers rather than maintaining a --version flag matrix. #335943
366 _gcc_fullversion() {
367 local ver="$1"; shift
368 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
369 eval echo "$ver"
370 }
371
372 # @FUNCTION: gcc-fullversion
373 # @RETURN: compiler version (major.minor.micro: [3.4.6])
374 gcc-fullversion() {
375 _gcc_fullversion '$1.$2.$3' "$@"
376 }
377 # @FUNCTION: gcc-version
378 # @RETURN: compiler version (major.minor: [3.4].6)
379 gcc-version() {
380 _gcc_fullversion '$1.$2' "$@"
381 }
382 # @FUNCTION: gcc-major-version
383 # @RETURN: major compiler version (major: [3].4.6)
384 gcc-major-version() {
385 _gcc_fullversion '$1' "$@"
386 }
387 # @FUNCTION: gcc-minor-version
388 # @RETURN: minor compiler version (minor: 3.[4].6)
389 gcc-minor-version() {
390 _gcc_fullversion '$2' "$@"
391 }
392 # @FUNCTION: gcc-micro-version
393 # @RETURN: micro compiler version (micro: 3.4.[6])
394 gcc-micro-version() {
395 _gcc_fullversion '$3' "$@"
396 }
397
398 # Returns the installation directory - internal toolchain
399 # function for use by _gcc-specs-exists (for flag-o-matic).
400 _gcc-install-dir() {
401 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
402 awk '$1=="install:" {print $2}')"
403 }
404 # Returns true if the indicated specs file exists - internal toolchain
405 # function for use by flag-o-matic.
406 _gcc-specs-exists() {
407 [[ -f $(_gcc-install-dir)/$1 ]]
408 }
409
410 # Returns requested gcc specs directive unprocessed - for used by
411 # gcc-specs-directive()
412 # Note; later specs normally overwrite earlier ones; however if a later
413 # spec starts with '+' then it appends.
414 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
415 # as "Reading <file>", in order. Strictly speaking, if there's a
416 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
417 # the same token anything from 'gcc -dumpspecs' is overridden by
418 # the contents of $(gcc_install_dir)/specs so the result is the
419 # same either way.
420 _gcc-specs-directive_raw() {
421 local cc=$(tc-getCC)
422 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
423 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
424 'BEGIN { pspec=""; spec=""; outside=1 }
425 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
426 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
427 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
428 { spec=spec $0 }
429 END { print spec }'
430 return 0
431 }
432
433 # Return the requested gcc specs directive, with all included
434 # specs expanded.
435 # Note, it does not check for inclusion loops, which cause it
436 # to never finish - but such loops are invalid for gcc and we're
437 # assuming gcc is operational.
438 gcc-specs-directive() {
439 local directive subdname subdirective
440 directive="$(_gcc-specs-directive_raw $1)"
441 while [[ ${directive} == *%\(*\)* ]]; do
442 subdname=${directive/*%\(}
443 subdname=${subdname/\)*}
444 subdirective="$(_gcc-specs-directive_raw ${subdname})"
445 directive="${directive//\%(${subdname})/${subdirective}}"
446 done
447 echo "${directive}"
448 return 0
449 }
450
451 # Returns true if gcc sets relro
452 gcc-specs-relro() {
453 local directive
454 directive=$(gcc-specs-directive link_command)
455 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
456 }
457 # Returns true if gcc sets now
458 gcc-specs-now() {
459 local directive
460 directive=$(gcc-specs-directive link_command)
461 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
462 }
463 # Returns true if gcc builds PIEs
464 gcc-specs-pie() {
465 local directive
466 directive=$(gcc-specs-directive cc1)
467 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
468 }
469 # Returns true if gcc builds with the stack protector
470 gcc-specs-ssp() {
471 local directive
472 directive=$(gcc-specs-directive cc1)
473 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
474 }
475 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
476 gcc-specs-ssp-to-all() {
477 local directive
478 directive=$(gcc-specs-directive cc1)
479 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
480 }
481 # Returns true if gcc builds with fno-strict-overflow
482 gcc-specs-nostrict() {
483 local directive
484 directive=$(gcc-specs-directive cc1)
485 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
486 }
487
488
489 # @FUNCTION: gen_usr_ldscript
490 # @USAGE: [-a] <list of libs to create linker scripts for>
491 # @DESCRIPTION:
492 # This function generate linker scripts in /usr/lib for dynamic
493 # libs in /lib. This is to fix linking problems when you have
494 # the .so in /lib, and the .a in /usr/lib. What happens is that
495 # in some cases when linking dynamic, the .a in /usr/lib is used
496 # instead of the .so in /lib due to gcc/libtool tweaking ld's
497 # library search path. This causes many builds to fail.
498 # See bug #4411 for more info.
499 #
500 # Note that you should in general use the unversioned name of
501 # the library (libfoo.so), as ldconfig should usually update it
502 # correctly to point to the latest version of the library present.
503 gen_usr_ldscript() {
504 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
505 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
506
507 tc-is-static-only && return
508
509 # Just make sure it exists
510 dodir /usr/${libdir}
511
512 if [[ $1 == "-a" ]] ; then
513 auto=true
514 shift
515 dodir /${libdir}
516 fi
517
518 # OUTPUT_FORMAT gives hints to the linker as to what binary format
519 # is referenced ... makes multilib saner
520 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
521 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
522
523 for lib in "$@" ; do
524 local tlib
525 if ${auto} ; then
526 lib="lib${lib}${suffix}"
527 else
528 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
529 # This especially is for AIX where $(get_libname) can return ".a",
530 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
531 [[ -r ${ED}/${libdir}/${lib} ]] || continue
532 #TODO: better die here?
533 fi
534
535 case ${CTARGET:-${CHOST}} in
536 *-darwin*)
537 if ${auto} ; then
538 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
539 else
540 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
541 fi
542 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
543 tlib=${tlib##*/}
544
545 if ${auto} ; then
546 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
547 # some install_names are funky: they encode a version
548 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
549 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
550 fi
551 rm -f "${ED}"/${libdir}/${lib}
552 fi
553
554 # Mach-O files have an id, which is like a soname, it tells how
555 # another object linking against this lib should reference it.
556 # Since we moved the lib from usr/lib into lib this reference is
557 # wrong. Hence, we update it here. We don't configure with
558 # libdir=/lib because that messes up libtool files.
559 # Make sure we don't lose the specific version, so just modify the
560 # existing install_name
561 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
562 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
563 local nowrite=yes
564 fi
565 install_name_tool \
566 -id "${EPREFIX}"/${libdir}/${tlib} \
567 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
568 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
569 # Now as we don't use GNU binutils and our linker doesn't
570 # understand linker scripts, just create a symlink.
571 pushd "${ED}/usr/${libdir}" > /dev/null
572 ln -snf "../../${libdir}/${tlib}" "${lib}"
573 popd > /dev/null
574 ;;
575 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
576 if ${auto} ; then
577 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
578 # no way to retrieve soname on these platforms (?)
579 tlib=$(readlink "${ED}"/${libdir}/${lib})
580 tlib=${tlib##*/}
581 if [[ -z ${tlib} ]] ; then
582 # ok, apparently was not a symlink, don't remove it and
583 # just link to it
584 tlib=${lib}
585 else
586 rm -f "${ED}"/${libdir}/${lib}
587 fi
588 else
589 tlib=${lib}
590 fi
591
592 # we don't have GNU binutils on these platforms, so we symlink
593 # instead, which seems to work fine. Keep it relative, otherwise
594 # we break some QA checks in Portage
595 # on interix, the linker scripts would work fine in _most_
596 # situations. if a library links to such a linker script the
597 # absolute path to the correct library is inserted into the binary,
598 # which is wrong, since anybody linking _without_ libtool will miss
599 # some dependencies, since the stupid linker cannot find libraries
600 # hardcoded with absolute paths (as opposed to the loader, which
601 # seems to be able to do this).
602 # this has been seen while building shared-mime-info which needs
603 # libxml2, but links without libtool (and does not add libz to the
604 # command line by itself).
605 pushd "${ED}/usr/${libdir}" > /dev/null
606 ln -snf "../../${libdir}/${tlib}" "${lib}"
607 popd > /dev/null
608 ;;
609 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
610 if ${auto} ; then
611 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
612 [[ -z ${tlib} ]] && tlib=${lib}
613 tlib=${tlib##*/} # 'internal name' can have a path component
614 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
615 # some SONAMEs are funky: they encode a version before the .so
616 if [[ ${tlib} != ${lib}* ]] ; then
617 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
618 fi
619 [[ ${tlib} != ${lib} ]] &&
620 rm -f "${ED}"/${libdir}/${lib}
621 else
622 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
623 [[ -z ${tlib} ]] && tlib=${lib}
624 tlib=${tlib##*/} # 'internal name' can have a path component
625 fi
626 pushd "${ED}"/usr/${libdir} >/dev/null
627 ln -snf "../../${libdir}/${tlib}" "${lib}"
628 # need the internal name in usr/lib too, to be available at runtime
629 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
630 [[ ${tlib} != ${lib} ]] &&
631 ln -snf "../../${libdir}/${tlib}" "${tlib}"
632 popd >/dev/null
633 ;;
634 *)
635 if ${auto} ; then
636 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
637 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
638 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
639 # some SONAMEs are funky: they encode a version before the .so
640 if [[ ${tlib} != ${lib}* ]] ; then
641 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
642 fi
643 rm -f "${ED}"/${libdir}/${lib}
644 else
645 tlib=${lib}
646 fi
647 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
648 /* GNU ld script
649 Since Gentoo has critical dynamic libraries in /lib, and the static versions
650 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
651 run into linking problems. This "fake" dynamic lib is a linker script that
652 redirects the linker to the real lib. And yes, this works in the cross-
653 compiling scenario as the sysroot-ed linker will prepend the real path.
654
655 See bug http://bugs.gentoo.org/4411 for more info.
656 */
657 ${output_format}
658 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
659 END_LDSCRIPT
660 ;;
661 esac
662 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
663 done
664 }

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