/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.89 - (hide annotations) (download)
Sat Apr 4 17:17:56 2009 UTC (5 years, 8 months ago) by grobian
Branch: MAIN
Changes since 1.88: +179 -7 lines
Add support for all Prefix arches, in particular for gen_usr_ld_script, and add AIX specific function, backport from Prefix

1 vapier 1.67 # Copyright 1999-2007 Gentoo Foundation
2 vapier 1.1 # Distributed under the terms of the GNU General Public License v2
3 grobian 1.89 # $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.88 2009/03/28 11:09:27 vapier Exp $
4 vapier 1.74
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 vapier 1.1
16 vapier 1.69 ___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
17     [[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
18 eradicator 1.34
19 vapier 1.1 DESCRIPTION="Based on the ${ECLASS} eclass"
20    
21     tc-getPROG() {
22 vapier 1.33 local var=$1
23     local prog=$2
24 vapier 1.1
25 vapier 1.17 if [[ -n ${!var} ]] ; then
26 vapier 1.1 echo "${!var}"
27     return 0
28     fi
29    
30 eradicator 1.35 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 vapier 1.1
35 vapier 1.17 export ${var}=${prog}
36 vapier 1.1 echo "${!var}"
37     }
38    
39 vapier 1.74 # @FUNCTION: tc-getAR
40     # @USAGE: [toolchain prefix]
41     # @RETURN: name of the archiver
42 vapier 1.33 tc-getAR() { tc-getPROG AR ar "$@"; }
43 vapier 1.74 # @FUNCTION: tc-getAS
44     # @USAGE: [toolchain prefix]
45     # @RETURN: name of the assembler
46 vapier 1.33 tc-getAS() { tc-getPROG AS as "$@"; }
47 vapier 1.74 # @FUNCTION: tc-getCC
48     # @USAGE: [toolchain prefix]
49     # @RETURN: name of the C compiler
50 vapier 1.33 tc-getCC() { tc-getPROG CC gcc "$@"; }
51 vapier 1.74 # @FUNCTION: tc-getCPP
52     # @USAGE: [toolchain prefix]
53     # @RETURN: name of the C preprocessor
54 robbat2 1.58 tc-getCPP() { tc-getPROG CPP cpp "$@"; }
55 vapier 1.74 # @FUNCTION: tc-getCXX
56     # @USAGE: [toolchain prefix]
57     # @RETURN: name of the C++ compiler
58 vapier 1.33 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
59 vapier 1.74 # @FUNCTION: tc-getLD
60     # @USAGE: [toolchain prefix]
61     # @RETURN: name of the linker
62 vapier 1.33 tc-getLD() { tc-getPROG LD ld "$@"; }
63 vapier 1.74 # @FUNCTION: tc-getSTRIP
64     # @USAGE: [toolchain prefix]
65     # @RETURN: name of the strip program
66 kanaka 1.59 tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
67 vapier 1.74 # @FUNCTION: tc-getNM
68     # @USAGE: [toolchain prefix]
69     # @RETURN: name of the symbol/object thingy
70 vapier 1.33 tc-getNM() { tc-getPROG NM nm "$@"; }
71 vapier 1.74 # @FUNCTION: tc-getRANLIB
72     # @USAGE: [toolchain prefix]
73     # @RETURN: name of the archiver indexer
74 vapier 1.33 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
75 kumba 1.86 # @FUNCTION: tc-getOBJCOPY
76     # @USAGE: [toolchain prefix]
77     # @RETURN: name of the object copier
78     tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
79 vapier 1.74 # @FUNCTION: tc-getF77
80     # @USAGE: [toolchain prefix]
81     # @RETURN: name of the Fortran 77 compiler
82 kanaka 1.59 tc-getF77() { tc-getPROG F77 f77 "$@"; }
83 dberkholz 1.78 # @FUNCTION: tc-getFC
84 vapier 1.74 # @USAGE: [toolchain prefix]
85     # @RETURN: name of the Fortran 90 compiler
86 dberkholz 1.78 tc-getFC() { tc-getPROG FC gfortran "$@"; }
87 vapier 1.74 # @FUNCTION: tc-getGCJ
88     # @USAGE: [toolchain prefix]
89     # @RETURN: name of the java compiler
90 vapier 1.33 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
91 vapier 1.1
92 vapier 1.74 # @FUNCTION: tc-getBUILD_CC
93     # @USAGE: [toolchain prefix]
94     # @RETURN: name of the C compiler for building binaries to run on the build machine
95 vapier 1.4 tc-getBUILD_CC() {
96 vapier 1.43 local v
97     for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
98     if [[ -n ${!v} ]] ; then
99     export BUILD_CC=${!v}
100     echo "${!v}"
101     return 0
102     fi
103     done
104 vapier 1.4
105 vapier 1.9 local search=
106 vapier 1.17 if [[ -n ${CBUILD} ]] ; then
107 vapier 1.21 search=$(type -p ${CBUILD}-gcc)
108 vapier 1.17 search=${search##*/}
109 vapier 1.9 fi
110 vapier 1.45 search=${search:-gcc}
111 vapier 1.11
112 vapier 1.17 export BUILD_CC=${search}
113 vapier 1.11 echo "${search}"
114 vapier 1.4 }
115 vapier 1.1
116 vapier 1.74 # @FUNCTION: tc-export
117     # @USAGE: <list of toolchain variables>
118     # @DESCRIPTION:
119     # Quick way to export a bunch of compiler vars at once.
120 vapier 1.10 tc-export() {
121     local var
122     for var in "$@" ; do
123 vapier 1.79 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
124 vapier 1.36 eval tc-get${var} > /dev/null
125 vapier 1.10 done
126     }
127    
128 vapier 1.74 # @FUNCTION: tc-is-cross-compiler
129     # @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
130 vapier 1.12 tc-is-cross-compiler() {
131 vapier 1.43 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
132 vapier 1.12 }
133    
134 vapier 1.74 # @FUNCTION: tc-is-softfloat
135     # @DESCRIPTION:
136 vapier 1.65 # See if this toolchain is a softfloat based one.
137 vapier 1.74 # @CODE
138 vapier 1.65 # The possible return values:
139     # - only: the target is always softfloat (never had fpu)
140     # - yes: the target should support softfloat
141     # - no: the target should support hardfloat
142 vapier 1.74 # @CODE
143 vapier 1.65 # This allows us to react differently where packages accept
144     # softfloat flags in the case where support is optional, but
145     # rejects softfloat flags where the target always lacks an fpu.
146     tc-is-softfloat() {
147     case ${CTARGET} in
148 vapier 1.66 bfin*|h8300*)
149 vapier 1.65 echo "only" ;;
150     *)
151     [[ ${CTARGET//_/-} == *-softfloat-* ]] \
152     && echo "yes" \
153     || echo "no"
154     ;;
155     esac
156     }
157 vapier 1.1
158 swegener 1.40 # Parse information from CBUILD/CHOST/CTARGET rather than
159 vapier 1.20 # use external variables from the profile.
160     tc-ninja_magic_to_arch() {
161 vapier 1.21 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
162 vapier 1.19
163     local type=$1
164     local host=$2
165 eradicator 1.25 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
166 vapier 1.19
167     case ${host} in
168 grobian 1.89 powerpc-apple-darwin*)
169     echo ppc-macos;;
170     powerpc64-apple-darwin*)
171     echo ppc64-macos;;
172     i?86-apple-darwin*)
173     echo x86-macos;;
174     x86_64-apple-darwin*)
175     echo x64-macos;;
176     sparc-sun-solaris*)
177     echo sparc-solaris;;
178     sparcv9-sun-solaris*)
179     echo sparc64-solaris;;
180     i?86-pc-solaris*)
181     echo x86-solaris;;
182     x86_64-pc-solaris*)
183     echo x64-solaris;;
184     powerpc-ibm-aix*)
185     echo ppc-aix;;
186     mips-sgi-irix*)
187     echo mips-irix;;
188     ia64-hp-hpux*)
189     echo ia64-hpux;;
190     i?86-pc-freebsd*)
191     echo x86-freebsd;;
192     x86_64-pc-freebsd*)
193     echo x64-freebsd;;
194     i?86-pc-netbsd*)
195     echo x86-netbsd;;
196     i?86-pc-interix*)
197     echo x86-interix;;
198     i?86-pc-winnt*)
199     echo x86-winnt;;
200     i*-pc-freebsd*)
201     echo x86-freebsd;;
202     x86_64-pc-freebsd*)
203     echo x64-freebsd;;
204    
205 vapier 1.19 alpha*) echo alpha;;
206     arm*) echo arm;;
207 vapier 1.72 avr*) ninj avr32 avr;;
208 vapier 1.53 bfin*) ninj blackfin bfin;;
209 vapier 1.47 cris*) echo cris;;
210 vapier 1.19 hppa*) ninj parisc hppa;;
211 vapier 1.75 i?86*)
212     # Starting with linux-2.6.24, the 'x86_64' and 'i386'
213     # trees have been unified into 'x86'.
214 aballier 1.77 # FreeBSD still uses i386
215     if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
216 vapier 1.75 echo i386
217     else
218     echo x86
219     fi
220     ;;
221 vapier 1.19 ia64*) echo ia64;;
222 vapier 1.23 m68*) echo m68k;;
223 vapier 1.19 mips*) echo mips;;
224 vapier 1.52 nios2*) echo nios2;;
225     nios*) echo nios;;
226 vapier 1.49 powerpc*)
227     # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
228 josejx 1.54 # have been unified into simply 'powerpc', but until 2.6.16,
229     # ppc32 is still using ARCH="ppc" as default
230     if [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] && [[ ${type} == "kern" ]] ; then
231 vapier 1.49 echo powerpc
232 josejx 1.54 elif [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] && [[ ${type} == "kern" ]] ; then
233 dostrow 1.55 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
234 josejx 1.54 echo powerpc
235     else
236     echo ppc
237 swegener 1.56 fi
238 vapier 1.49 elif [[ ${host} == powerpc64* ]] ; then
239     echo ppc64
240 dostrow 1.51 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
241     ninj ppc64 ppc
242 vapier 1.49 else
243     echo ppc
244     fi
245 dostrow 1.37 ;;
246 vapier 1.47 s390*) echo s390;;
247     sh64*) ninj sh64 sh;;
248     sh*) echo sh;;
249 vapier 1.19 sparc64*) ninj sparc64 sparc;;
250 vapier 1.28 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
251     && ninj sparc64 sparc \
252     || echo sparc
253     ;;
254 vapier 1.47 vax*) echo vax;;
255 vapier 1.75 x86_64*)
256     # Starting with linux-2.6.24, the 'x86_64' and 'i386'
257     # trees have been unified into 'x86'.
258     if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
259     echo x86
260     else
261     ninj x86_64 amd64
262     fi
263     ;;
264 vapier 1.73
265     # since our usage of tc-arch is largely concerned with
266     # normalizing inputs for testing ${CTARGET}, let's filter
267     # other cross targets (mingw and such) into the unknown.
268     *) echo unknown;;
269 vapier 1.19 esac
270     }
271 vapier 1.74 # @FUNCTION: tc-arch-kernel
272     # @USAGE: [toolchain prefix]
273     # @RETURN: name of the kernel arch according to the compiler target
274 vapier 1.20 tc-arch-kernel() {
275 vapier 1.74 tc-ninja_magic_to_arch kern "$@"
276 vapier 1.19 }
277 vapier 1.74 # @FUNCTION: tc-arch
278     # @USAGE: [toolchain prefix]
279     # @RETURN: name of the portage arch according to the compiler target
280 vapier 1.20 tc-arch() {
281 vapier 1.74 tc-ninja_magic_to_arch portage "$@"
282 vapier 1.19 }
283 vapier 1.74
284 robbat2 1.71 tc-endian() {
285     local host=$1
286     [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
287     host=${host%%-*}
288    
289     case ${host} in
290     alpha*) echo big;;
291     arm*b*) echo big;;
292     arm*) echo little;;
293     cris*) echo little;;
294     hppa*) echo big;;
295     i?86*) echo little;;
296     ia64*) echo little;;
297     m68*) echo big;;
298     mips*l*) echo little;;
299     mips*) echo big;;
300     powerpc*) echo big;;
301     s390*) echo big;;
302     sh*b*) echo big;;
303     sh*) echo little;;
304     sparc*) echo big;;
305     x86_64*) echo little;;
306     *) echo wtf;;
307     esac
308     }
309 vapier 1.19
310 vapier 1.74 # @FUNCTION: gcc-fullversion
311     # @RETURN: compiler version (major.minor.micro: [3.4.6])
312 vapier 1.1 gcc-fullversion() {
313 vapier 1.63 $(tc-getCC "$@") -dumpversion
314 vapier 1.1 }
315 vapier 1.74 # @FUNCTION: gcc-version
316     # @RETURN: compiler version (major.minor: [3.4].6)
317 vapier 1.1 gcc-version() {
318 vapier 1.63 gcc-fullversion "$@" | cut -f1,2 -d.
319 vapier 1.1 }
320 vapier 1.74 # @FUNCTION: gcc-major-version
321     # @RETURN: major compiler version (major: [3].4.6)
322 vapier 1.1 gcc-major-version() {
323 vapier 1.63 gcc-version "$@" | cut -f1 -d.
324 vapier 1.1 }
325 vapier 1.74 # @FUNCTION: gcc-minor-version
326     # @RETURN: minor compiler version (minor: 3.[4].6)
327 vapier 1.1 gcc-minor-version() {
328 vapier 1.63 gcc-version "$@" | cut -f2 -d.
329 vapier 1.1 }
330 vapier 1.74 # @FUNCTION: gcc-micro-version
331     # @RETURN: micro compiler version (micro: 3.4.[6])
332 vapier 1.1 gcc-micro-version() {
333 vapier 1.63 gcc-fullversion "$@" | cut -f3 -d. | cut -f1 -d-
334 vapier 1.1 }
335 vapier 1.74
336 kevquinn 1.68 # Returns the installation directory - internal toolchain
337     # function for use by _gcc-specs-exists (for flag-o-matic).
338     _gcc-install-dir() {
339 vapier 1.76 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
340 kevquinn 1.68 awk '$1=="install:" {print $2}')"
341     }
342     # Returns true if the indicated specs file exists - internal toolchain
343     # function for use by flag-o-matic.
344     _gcc-specs-exists() {
345     [[ -f $(_gcc-install-dir)/$1 ]]
346     }
347 kevquinn 1.41
348 kevquinn 1.68 # Returns requested gcc specs directive unprocessed - for used by
349     # gcc-specs-directive()
350 kevquinn 1.46 # Note; later specs normally overwrite earlier ones; however if a later
351     # spec starts with '+' then it appends.
352     # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
353 kevquinn 1.68 # as "Reading <file>", in order. Strictly speaking, if there's a
354     # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
355     # the same token anything from 'gcc -dumpspecs' is overridden by
356     # the contents of $(gcc_install_dir)/specs so the result is the
357     # same either way.
358     _gcc-specs-directive_raw() {
359 kevquinn 1.57 local cc=$(tc-getCC)
360     local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
361     ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
362 kevquinn 1.46 'BEGIN { pspec=""; spec=""; outside=1 }
363     $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
364 kevquinn 1.41 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
365 kevquinn 1.46 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
366     { spec=spec $0 }
367     END { print spec }'
368     return 0
369 kevquinn 1.41 }
370    
371 kevquinn 1.68 # Return the requested gcc specs directive, with all included
372     # specs expanded.
373     # Note, it does not check for inclusion loops, which cause it
374     # to never finish - but such loops are invalid for gcc and we're
375     # assuming gcc is operational.
376     gcc-specs-directive() {
377     local directive subdname subdirective
378     directive="$(_gcc-specs-directive_raw $1)"
379     while [[ ${directive} == *%\(*\)* ]]; do
380     subdname=${directive/*%\(}
381     subdname=${subdname/\)*}
382     subdirective="$(_gcc-specs-directive_raw ${subdname})"
383     directive="${directive//\%(${subdname})/${subdirective}}"
384     done
385     echo "${directive}"
386     return 0
387     }
388    
389 kevquinn 1.41 # Returns true if gcc sets relro
390     gcc-specs-relro() {
391     local directive
392     directive=$(gcc-specs-directive link_command)
393 gengor 1.84 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
394 kevquinn 1.41 }
395     # Returns true if gcc sets now
396     gcc-specs-now() {
397     local directive
398     directive=$(gcc-specs-directive link_command)
399 gengor 1.84 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
400 kevquinn 1.41 }
401     # Returns true if gcc builds PIEs
402     gcc-specs-pie() {
403     local directive
404     directive=$(gcc-specs-directive cc1)
405 gengor 1.84 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
406 kevquinn 1.41 }
407     # Returns true if gcc builds with the stack protector
408     gcc-specs-ssp() {
409     local directive
410     directive=$(gcc-specs-directive cc1)
411 gengor 1.84 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
412 kevquinn 1.41 }
413 kevquinn 1.46 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
414     gcc-specs-ssp-to-all() {
415     local directive
416     directive=$(gcc-specs-directive cc1)
417 gengor 1.84 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
418 kevquinn 1.46 }
419 gengor 1.80 # Returns true if gcc builds with fno-strict-overflow
420     gcc-specs-nostrict() {
421     local directive
422     directive=$(gcc-specs-directive cc1)
423 gengor 1.84 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
424 gengor 1.80 }
425 vapier 1.60
426    
427 vapier 1.74 # @FUNCTION: gen_usr_ldscript
428 vapier 1.85 # @USAGE: [-a] <list of libs to create linker scripts for>
429 vapier 1.74 # @DESCRIPTION:
430 vapier 1.60 # This function generate linker scripts in /usr/lib for dynamic
431     # libs in /lib. This is to fix linking problems when you have
432     # the .so in /lib, and the .a in /usr/lib. What happens is that
433     # in some cases when linking dynamic, the .a in /usr/lib is used
434     # instead of the .so in /lib due to gcc/libtool tweaking ld's
435 vapier 1.74 # library search path. This causes many builds to fail.
436 vapier 1.60 # See bug #4411 for more info.
437     #
438     # Note that you should in general use the unversioned name of
439 vapier 1.74 # the library (libfoo.so), as ldconfig should usually update it
440     # correctly to point to the latest version of the library present.
441 vapier 1.70 gen_usr_ldscript() {
442 vapier 1.85 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
443 vapier 1.60 # Just make sure it exists
444     dodir /usr/${libdir}
445    
446 vapier 1.85 if [[ $1 == "-a" ]] ; then
447     auto=true
448     shift
449     dodir /${libdir}
450     fi
451    
452 vapier 1.60 # OUTPUT_FORMAT gives hints to the linker as to what binary format
453     # is referenced ... makes multilib saner
454     output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
455     [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
456    
457     for lib in "$@" ; do
458 grobian 1.89
459     # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
460     # This especially is for AIX where $(get_libname) can return ".a",
461     # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
462     [[ -r "${ED}"/${libdir}/${lib} ]] || continue
463    
464     case ${CHOST} in
465     *-darwin*)
466     # Mach-O files have an id, which is like a soname, it tells how
467     # another object linking against this lib should reference it.
468     # Since we moved the lib from usr/lib into lib this reference is
469     # wrong. Hence, we update it here. We don't configure with
470     # libdir=/lib because that messes up libtool files.
471     # Make sure we don't lose the specific version, so just modify the
472     # existing install_name
473     install_name=$(otool -DX "${ED}"/${libdir}/${lib})
474     [[ -z ${install_name} ]] && die "No install name found for ${ED}/${libdir}/${lib}"
475     install_name_tool \
476     -id "${EPREFIX}"/${libdir}/${install_name##*/} \
477     "${ED}"/${libdir}/${lib}
478     # Now as we don't use GNU binutils and our linker doesn't
479     # understand linker scripts, just create a symlink.
480     pushd "${ED}/usr/${libdir}" > /dev/null
481     ln -snf "../../${libdir}/${lib}" "${lib}"
482     popd > /dev/null
483     ;;
484     *-aix*|*-irix*|*-hpux*)
485     # we don't have GNU binutils on these platforms, so we symlink
486     # instead, which seems to work fine. Keep it relative, otherwise
487     # we break some QA checks in Portage
488     pushd "${ED}/usr/${libdir}" > /dev/null
489     ln -snf "../../${libdir}/${lib}" "${lib}"
490     popd > /dev/null
491     ;;
492     *-interix*|*-winnt*)
493     # on interix, the linker scripts would work fine in _most_
494     # situations. if a library links to such a linker script the
495     # absolute path to the correct library is inserted into the binary,
496     # which is wrong, since anybody linking _without_ libtool will miss
497     # some dependencies, since the stupid linker cannot find libraries
498     # hardcoded with absolute paths (as opposed to the loader, which
499     # seems to be able to do this).
500     # this has been seen while building shared-mime-info which needs
501     # libxml2, but links without libtool (and does not add libz to the
502     # command line by itself).
503     pushd "${ED}/usr/${libdir}" > /dev/null
504     ln -snf "../../${libdir}/${lib}" "${lib}"
505     popd > /dev/null
506     ;;
507     *-mint*)
508     # do nothing
509     return
510     ;;
511     *)
512 vapier 1.85 local tlib
513     if ${auto} ; then
514     lib="lib${lib}${suffix}"
515 vapier 1.88 tlib=$(scanelf -qF'%S#F' "${D}"/usr/${libdir}/${lib})
516 vapier 1.85 mv "${D}"/usr/${libdir}/${lib}* "${D}"/${libdir}/ || die
517 vapier 1.88 # some SONAMEs are funky: they encode a version before the .so
518     if [[ ${tlib} != ${lib}* ]] ; then
519     mv "${D}"/usr/${libdir}/${tlib}* "${D}"/${libdir}/ || die
520     fi
521 vapier 1.85 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
522     rm -f "${D}"/${libdir}/${lib}
523     else
524     tlib=${lib}
525     fi
526 grobian 1.61 cat > "${D}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
527     /* GNU ld script
528 vapier 1.87 Since Gentoo has critical dynamic libraries in /lib, and the static versions
529     in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
530     run into linking problems. This "fake" dynamic lib is a linker script that
531     redirects the linker to the real lib. And yes, this works in the cross-
532     compiling scenario as the sysroot-ed linker will prepend the real path.
533 grobian 1.61
534     See bug http://bugs.gentoo.org/4411 for more info.
535     */
536     ${output_format}
537 vapier 1.85 GROUP ( /${libdir}/${tlib} )
538 grobian 1.61 END_LDSCRIPT
539 grobian 1.89 ;;
540     esac
541     fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
542     done
543     }
544    
545     # This function is for AIX only.
546     #
547     # Showing a sample IMO is the best description:
548     #
549     # First, AIX has its own /usr/lib/libiconv.a containing 'shr.o' and 'shr4.o'.
550     # Both of them are shared-objects packed into an archive, thus /usr/lib/libiconv.a
551     # is a shared library (!), even it is called lib*.a.
552     # This is the default layout on aix for shared libraries.
553     # Read the ld(1) manpage for more information.
554     #
555     # But now, we want to install GNU libiconv (sys-libs/libiconv) both as
556     # shared and static library.
557     # AIX (since 4.3) can create shared libraries if '-brtl' or '-G' linker flags
558     # are used.
559     #
560     # Now assume we have GNU tar installed while GNU libiconv was not.
561     # This tar now has a runtime dependency on "libiconv.a(shr4.o)".
562     # With our ld-wrapper (from sys-devel/binutils-config) we add EPREFIX/usr/lib
563     # as linker path, thus it is recorded as loader path into the binary.
564     #
565     # When having libiconv.a (the static GNU libiconv) in prefix, the loader finds
566     # that one and claims that it does not contain an 'shr4.o' object file:
567     #
568     # Could not load program tar:
569     # Dependent module EPREFIX/usr/lib/libiconv.a(shr4.o) could not be loaded.
570     # Member shr4.o is not found in archive
571     #
572     # According to gcc's "host/target specific installation notes" for *-ibm-aix* [1],
573     # we can extract that 'shr4.o' from /usr/lib/libiconv.a, mark it as
574     # non-linkable, and include it in our new static library.
575     #
576     # [1] http://gcc.gnu.org/install/specific.html#x-ibm-aix
577     #
578     # usage:
579     # keep_aix_runtime_object <target-archive inside EPREFIX> <source-archive(objects)>
580     # keep_aix_runtime_object "/usr/lib/libiconv.a "/usr/lib/libiconv.a(shr4.o,...)"
581     keep_aix_runtime_objects() {
582     [[ ${CHOST} == *-*-aix* ]] || return 0
583    
584     local target=$1
585     shift
586     local sources="$@"
587    
588     # strip possible ${ED} prefixes
589     target=${target##/}
590     target=${target#${D##/}}
591     target=${target#${EPREFIX##/}}
592     target=${target##/}
593    
594     if ! $(tc-getAR) -t "${ED}${target}" &>/dev/null; then
595     if [[ -e ${ED}${target} ]]; then
596     ewarn "${target} is not an archive."
597 grobian 1.61 fi
598 grobian 1.89 return 0
599     fi
600    
601     local tmpdir=${TMP}/keep_aix_runtime_object-$$
602     mkdir ${tmpdir} || die
603    
604     local origdir=$(pwd)
605     local s
606     for s in ${sources}; do
607     local sourcelib sourceobjs so
608     # format of $s: "/usr/lib/libiconv.a(shr4.o,shr.o)"
609     sourcelib=${s%%(*}
610     sourceobjs=${s#*(}
611     sourceobjs=${sourceobjs%)}
612     sourceobjs=${sourceobjs//,/ }
613     cd ${tmpdir} || die
614     for so in ${sourceobjs}; do
615     ebegin "keeping aix runtime object '${sourcelib}(${so})' in '${EPREFIX}/${target}'"
616     if ! $(tc-getAR) -x "${sourcelib}" ${so}; then
617     eend 1
618     continue
619     fi
620     chmod +w ${so} &&
621     $(tc-getSTRIP) -e ${so} &&
622     $(tc-getAR) -q "${ED}${target}" ${so} &&
623     eend 0 ||
624     eend 1
625     done
626 vapier 1.60 done
627 grobian 1.89 cd "${origdir}"
628 vapier 1.60 }

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