/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.108 - (show annotations) (download)
Mon Oct 17 19:11:49 2011 UTC (2 years, 9 months ago) by vapier
Branch: MAIN
Changes since 1.107: +69 -2 lines
add econf_build helper for cross-compiling some packages

1 # Copyright 1999-2011 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 1.107 2011/09/12 21:42:08 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 <VAR [search vars]> <default> [tuple]
22 _tc-getPROG() {
23 local tuple=$1
24 local v var vars=$2
25 local prog=$3
26
27 var=${vars%% *}
28 for v in ${vars} ; do
29 if [[ -n ${!v} ]] ; then
30 export ${var}="${!v}"
31 echo "${!v}"
32 return 0
33 fi
34 done
35
36 local search=
37 [[ -n $4 ]] && search=$(type -p "$4-${prog}")
38 [[ -z ${search} && -n ${!tuple} ]] && search=$(type -p "${!tuple}-${prog}")
39 [[ -n ${search} ]] && prog=${search##*/}
40
41 export ${var}=${prog}
42 echo "${!var}"
43 }
44 tc-getBUILD_PROG() { _tc-getPROG CBUILD "BUILD_$1 $1_FOR_BUILD HOST$1" "${@:2}"; }
45 tc-getPROG() { _tc-getPROG CHOST "$@"; }
46
47 # @FUNCTION: tc-getAR
48 # @USAGE: [toolchain prefix]
49 # @RETURN: name of the archiver
50 tc-getAR() { tc-getPROG AR ar "$@"; }
51 # @FUNCTION: tc-getAS
52 # @USAGE: [toolchain prefix]
53 # @RETURN: name of the assembler
54 tc-getAS() { tc-getPROG AS as "$@"; }
55 # @FUNCTION: tc-getCC
56 # @USAGE: [toolchain prefix]
57 # @RETURN: name of the C compiler
58 tc-getCC() { tc-getPROG CC gcc "$@"; }
59 # @FUNCTION: tc-getCPP
60 # @USAGE: [toolchain prefix]
61 # @RETURN: name of the C preprocessor
62 tc-getCPP() { tc-getPROG CPP cpp "$@"; }
63 # @FUNCTION: tc-getCXX
64 # @USAGE: [toolchain prefix]
65 # @RETURN: name of the C++ compiler
66 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
67 # @FUNCTION: tc-getLD
68 # @USAGE: [toolchain prefix]
69 # @RETURN: name of the linker
70 tc-getLD() { tc-getPROG LD ld "$@"; }
71 # @FUNCTION: tc-getSTRIP
72 # @USAGE: [toolchain prefix]
73 # @RETURN: name of the strip program
74 tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
75 # @FUNCTION: tc-getNM
76 # @USAGE: [toolchain prefix]
77 # @RETURN: name of the symbol/object thingy
78 tc-getNM() { tc-getPROG NM nm "$@"; }
79 # @FUNCTION: tc-getRANLIB
80 # @USAGE: [toolchain prefix]
81 # @RETURN: name of the archiver indexer
82 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
83 # @FUNCTION: tc-getOBJCOPY
84 # @USAGE: [toolchain prefix]
85 # @RETURN: name of the object copier
86 tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
87 # @FUNCTION: tc-getF77
88 # @USAGE: [toolchain prefix]
89 # @RETURN: name of the Fortran 77 compiler
90 tc-getF77() { tc-getPROG F77 gfortran "$@"; }
91 # @FUNCTION: tc-getFC
92 # @USAGE: [toolchain prefix]
93 # @RETURN: name of the Fortran 90 compiler
94 tc-getFC() { tc-getPROG FC gfortran "$@"; }
95 # @FUNCTION: tc-getGCJ
96 # @USAGE: [toolchain prefix]
97 # @RETURN: name of the java compiler
98 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
99 # @FUNCTION: tc-getPKG_CONFIG
100 # @USAGE: [toolchain prefix]
101 # @RETURN: name of the pkg-config tool
102 tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
103 # @FUNCTION: tc-getRC
104 # @USAGE: [toolchain prefix]
105 # @RETURN: name of the Windows resource compiler
106 tc-getRC() { tc-getPROG RC windres "$@"; }
107 # @FUNCTION: tc-getDLLWRAP
108 # @USAGE: [toolchain prefix]
109 # @RETURN: name of the Windows dllwrap utility
110 tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
111
112 # @FUNCTION: tc-getBUILD_AR
113 # @USAGE: [toolchain prefix]
114 # @RETURN: name of the archiver for building binaries to run on the build machine
115 tc-getBUILD_AR() { tc-getBUILD_PROG AR ar "$@"; }
116 # @FUNCTION: tc-getBUILD_AS
117 # @USAGE: [toolchain prefix]
118 # @RETURN: name of the assembler for building binaries to run on the build machine
119 tc-getBUILD_AS() { tc-getBUILD_PROG AS as "$@"; }
120 # @FUNCTION: tc-getBUILD_CC
121 # @USAGE: [toolchain prefix]
122 # @RETURN: name of the C compiler for building binaries to run on the build machine
123 tc-getBUILD_CC() { tc-getBUILD_PROG CC gcc "$@"; }
124 # @FUNCTION: tc-getBUILD_CPP
125 # @USAGE: [toolchain prefix]
126 # @RETURN: name of the C preprocessor for building binaries to run on the build machine
127 tc-getBUILD_CPP() { tc-getBUILD_PROG CPP cpp "$@"; }
128 # @FUNCTION: tc-getBUILD_CXX
129 # @USAGE: [toolchain prefix]
130 # @RETURN: name of the C++ compiler for building binaries to run on the build machine
131 tc-getBUILD_CXX() { tc-getBUILD_PROG CXX g++ "$@"; }
132 # @FUNCTION: tc-getBUILD_LD
133 # @USAGE: [toolchain prefix]
134 # @RETURN: name of the linker for building binaries to run on the build machine
135 tc-getBUILD_LD() { tc-getBUILD_PROG LD ld "$@"; }
136 # @FUNCTION: tc-getBUILD_STRIP
137 # @USAGE: [toolchain prefix]
138 # @RETURN: name of the strip program for building binaries to run on the build machine
139 tc-getBUILD_STRIP() { tc-getBUILD_PROG STRIP strip "$@"; }
140 # @FUNCTION: tc-getBUILD_NM
141 # @USAGE: [toolchain prefix]
142 # @RETURN: name of the symbol/object thingy for building binaries to run on the build machine
143 tc-getBUILD_NM() { tc-getBUILD_PROG NM nm "$@"; }
144 # @FUNCTION: tc-getBUILD_RANLIB
145 # @USAGE: [toolchain prefix]
146 # @RETURN: name of the archiver indexer for building binaries to run on the build machine
147 tc-getBUILD_RANLIB() { tc-getBUILD_PROG RANLIB ranlib "$@"; }
148 # @FUNCTION: tc-getBUILD_OBJCOPY
149 # @USAGE: [toolchain prefix]
150 # @RETURN: name of the object copier for building binaries to run on the build machine
151 tc-getBUILD_OBJCOPY() { tc-getBUILD_PROG OBJCOPY objcopy "$@"; }
152 # @FUNCTION: tc-getBUILD_PKG_CONFIG
153 # @USAGE: [toolchain prefix]
154 # @RETURN: name of the pkg-config tool for building binaries to run on the build machine
155 tc-getBUILD_PKG_CONFIG() { tc-getBUILD_PROG PKG_CONFIG pkg-config "$@"; }
156
157 # @FUNCTION: tc-export
158 # @USAGE: <list of toolchain variables>
159 # @DESCRIPTION:
160 # Quick way to export a bunch of compiler vars at once.
161 tc-export() {
162 local var
163 for var in "$@" ; do
164 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
165 eval tc-get${var} > /dev/null
166 done
167 }
168
169 # @FUNCTION: tc-is-cross-compiler
170 # @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
171 tc-is-cross-compiler() {
172 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
173 }
174
175 # @FUNCTION: tc-is-softfloat
176 # @DESCRIPTION:
177 # See if this toolchain is a softfloat based one.
178 # @CODE
179 # The possible return values:
180 # - only: the target is always softfloat (never had fpu)
181 # - yes: the target should support softfloat
182 # - no: the target doesn't support softfloat
183 # @CODE
184 # This allows us to react differently where packages accept
185 # softfloat flags in the case where support is optional, but
186 # rejects softfloat flags where the target always lacks an fpu.
187 tc-is-softfloat() {
188 case ${CTARGET} in
189 bfin*|h8300*)
190 echo "only" ;;
191 *)
192 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
193 && echo "yes" \
194 || echo "no"
195 ;;
196 esac
197 }
198
199 # @FUNCTION: tc-is-hardfloat
200 # @DESCRIPTION:
201 # See if this toolchain is a hardfloat based one.
202 # @CODE
203 # The possible return values:
204 # - yes: the target should support hardfloat
205 # - no: the target doesn't support hardfloat
206 tc-is-hardfloat() {
207 [[ ${CTARGET//_/-} == *-hardfloat-* ]] \
208 && echo "yes" \
209 || echo "no"
210 }
211
212 # @FUNCTION: tc-is-static-only
213 # @DESCRIPTION:
214 # Return shell true if the target does not support shared libs, shell false
215 # otherwise.
216 tc-is-static-only() {
217 local host=${CTARGET:-${CHOST}}
218
219 # *MiNT doesn't have shared libraries, only platform so far
220 return $([[ ${host} == *-mint* ]])
221 }
222
223 # @FUNCTION: tc-env_build
224 # @USAGE: <command> [command args]
225 # @INTERNAL
226 # @DESCRIPTION:
227 # Setup the compile environment to the build tools and then execute the
228 # specified command. We use tc-getBUILD_XX here so that we work with
229 # all of the semi-[non-]standard env vars like $BUILD_CC which often
230 # the target build system does not check.
231 tc-env_build() {
232 CFLAGS=${BUILD_CFLAGS:--O1 -pipe} \
233 CXXFLAGS=${BUILD_CXXFLAGS:--O1 -pipe} \
234 CPPFLAGS=${BUILD_CPPFLAGS} \
235 LDFLAGS=${BUILD_LDFLAGS} \
236 AR=$(tc-getBUILD_AR) \
237 AS=$(tc-getBUILD_AS) \
238 CC=$(tc-getBUILD_CC) \
239 CPP=$(tc-getBUILD_CPP) \
240 CXX=$(tc-getBUILD_CXX) \
241 LD=$(tc-getBUILD_LD) \
242 NM=$(tc-getBUILD_NM) \
243 PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
244 RANLIB=$(tc-getBUILD_RANLIB) \
245 "$@"
246 }
247
248 # @FUNCTION: econf_build
249 # @USAGE: [econf flags]
250 # @DESCRIPTION:
251 # Sometimes we need to locally build up some tools to run on CBUILD because
252 # the package has helper utils which are compiled+executed when compiling.
253 # This won't work when cross-compiling as the CHOST is set to a target which
254 # we cannot natively execute.
255 #
256 # For example, the python package will build up a local python binary using
257 # a portable build system (configure+make), but then use that binary to run
258 # local python scripts to build up other components of the overall python.
259 # We cannot rely on the python binary in $PATH as that often times will be
260 # a different version, or not even installed in the first place. Instead,
261 # we compile the code in a different directory to run on CBUILD, and then
262 # use that binary when compiling the main package to run on CHOST.
263 #
264 # For example, with newer EAPIs, you'd do something like:
265 # @CODE
266 # src_configure() {
267 # ECONF_SOURCE=${S}
268 # if tc-is-cross-compiler ; then
269 # mkdir "${WORKDIR}"/${CBUILD}
270 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
271 # econf_build --disable-some-unused-stuff
272 # popd >/dev/null
273 # fi
274 # ... normal build paths ...
275 # }
276 # src_compile() {
277 # if tc-is-cross-compiler ; then
278 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
279 # emake one-or-two-build-tools
280 # ln/mv build-tools to normal build paths in ${S}/
281 # popd >/dev/null
282 # fi
283 # ... normal build paths ...
284 # }
285 # @CODE
286 econf_build() {
287 tc-env_build econf --build=${CBUILD:-${CHOST}} "$@"
288 }
289
290 # @FUNCTION: tc-has-openmp
291 # @USAGE: [toolchain prefix]
292 # @DESCRIPTION:
293 # See if the toolchain supports OpenMP.
294 tc-has-openmp() {
295 local base="${T}/test-tc-openmp"
296 cat <<-EOF > "${base}.c"
297 #include <omp.h>
298 int main() {
299 int nthreads, tid, ret = 0;
300 #pragma omp parallel private(nthreads, tid)
301 {
302 tid = omp_get_thread_num();
303 nthreads = omp_get_num_threads(); ret += tid + nthreads;
304 }
305 return ret;
306 }
307 EOF
308 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
309 local ret=$?
310 rm -f "${base}"*
311 return ${ret}
312 }
313
314 # @FUNCTION: tc-has-tls
315 # @USAGE: [-s|-c|-l] [toolchain prefix]
316 # @DESCRIPTION:
317 # See if the toolchain supports thread local storage (TLS). Use -s to test the
318 # compiler, -c to also test the assembler, and -l to also test the C library
319 # (the default).
320 tc-has-tls() {
321 local base="${T}/test-tc-tls"
322 cat <<-EOF > "${base}.c"
323 int foo(int *i) {
324 static __thread int j = 0;
325 return *i ? j : *i;
326 }
327 EOF
328 local flags
329 case $1 in
330 -s) flags="-S";;
331 -c) flags="-c";;
332 -l) ;;
333 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
334 esac
335 : ${flags:=-fPIC -shared -Wl,-z,defs}
336 [[ $1 == -* ]] && shift
337 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
338 local ret=$?
339 rm -f "${base}"*
340 return ${ret}
341 }
342
343
344 # Parse information from CBUILD/CHOST/CTARGET rather than
345 # use external variables from the profile.
346 tc-ninja_magic_to_arch() {
347 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
348
349 local type=$1
350 local host=$2
351 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
352
353 case ${host} in
354 alpha*) echo alpha;;
355 arm*) echo arm;;
356 avr*) ninj avr32 avr;;
357 bfin*) ninj blackfin bfin;;
358 cris*) echo cris;;
359 hppa*) ninj parisc hppa;;
360 i?86*)
361 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
362 # trees have been unified into 'x86'.
363 # FreeBSD still uses i386
364 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
365 echo i386
366 else
367 echo x86
368 fi
369 ;;
370 ia64*) echo ia64;;
371 m68*) echo m68k;;
372 mips*) echo mips;;
373 nios2*) echo nios2;;
374 nios*) echo nios;;
375 powerpc*)
376 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
377 # have been unified into simply 'powerpc', but until 2.6.16,
378 # ppc32 is still using ARCH="ppc" as default
379 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
380 echo powerpc
381 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
382 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
383 echo powerpc
384 else
385 echo ppc
386 fi
387 elif [[ ${host} == powerpc64* ]] ; then
388 echo ppc64
389 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
390 ninj ppc64 ppc
391 else
392 echo ppc
393 fi
394 ;;
395 s390*) echo s390;;
396 sh64*) ninj sh64 sh;;
397 sh*) echo sh;;
398 sparc64*) ninj sparc64 sparc;;
399 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
400 && ninj sparc64 sparc \
401 || echo sparc
402 ;;
403 vax*) echo vax;;
404 x86_64*freebsd*) echo amd64;;
405 x86_64*)
406 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
407 # trees have been unified into 'x86'.
408 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
409 echo x86
410 else
411 ninj x86_64 amd64
412 fi
413 ;;
414
415 # since our usage of tc-arch is largely concerned with
416 # normalizing inputs for testing ${CTARGET}, let's filter
417 # other cross targets (mingw and such) into the unknown.
418 *) echo unknown;;
419 esac
420 }
421 # @FUNCTION: tc-arch-kernel
422 # @USAGE: [toolchain prefix]
423 # @RETURN: name of the kernel arch according to the compiler target
424 tc-arch-kernel() {
425 tc-ninja_magic_to_arch kern "$@"
426 }
427 # @FUNCTION: tc-arch
428 # @USAGE: [toolchain prefix]
429 # @RETURN: name of the portage arch according to the compiler target
430 tc-arch() {
431 tc-ninja_magic_to_arch portage "$@"
432 }
433
434 tc-endian() {
435 local host=$1
436 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
437 host=${host%%-*}
438
439 case ${host} in
440 alpha*) echo big;;
441 arm*b*) echo big;;
442 arm*) echo little;;
443 cris*) echo little;;
444 hppa*) echo big;;
445 i?86*) echo little;;
446 ia64*) echo little;;
447 m68*) echo big;;
448 mips*l*) echo little;;
449 mips*) echo big;;
450 powerpc*) echo big;;
451 s390*) echo big;;
452 sh*b*) echo big;;
453 sh*) echo little;;
454 sparc*) echo big;;
455 x86_64*) echo little;;
456 *) echo wtf;;
457 esac
458 }
459
460 # Internal func. The first argument is the version info to expand.
461 # Query the preprocessor to improve compatibility across different
462 # compilers rather than maintaining a --version flag matrix. #335943
463 _gcc_fullversion() {
464 local ver="$1"; shift
465 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
466 eval echo "$ver"
467 }
468
469 # @FUNCTION: gcc-fullversion
470 # @RETURN: compiler version (major.minor.micro: [3.4.6])
471 gcc-fullversion() {
472 _gcc_fullversion '$1.$2.$3' "$@"
473 }
474 # @FUNCTION: gcc-version
475 # @RETURN: compiler version (major.minor: [3.4].6)
476 gcc-version() {
477 _gcc_fullversion '$1.$2' "$@"
478 }
479 # @FUNCTION: gcc-major-version
480 # @RETURN: major compiler version (major: [3].4.6)
481 gcc-major-version() {
482 _gcc_fullversion '$1' "$@"
483 }
484 # @FUNCTION: gcc-minor-version
485 # @RETURN: minor compiler version (minor: 3.[4].6)
486 gcc-minor-version() {
487 _gcc_fullversion '$2' "$@"
488 }
489 # @FUNCTION: gcc-micro-version
490 # @RETURN: micro compiler version (micro: 3.4.[6])
491 gcc-micro-version() {
492 _gcc_fullversion '$3' "$@"
493 }
494
495 # Returns the installation directory - internal toolchain
496 # function for use by _gcc-specs-exists (for flag-o-matic).
497 _gcc-install-dir() {
498 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
499 awk '$1=="install:" {print $2}')"
500 }
501 # Returns true if the indicated specs file exists - internal toolchain
502 # function for use by flag-o-matic.
503 _gcc-specs-exists() {
504 [[ -f $(_gcc-install-dir)/$1 ]]
505 }
506
507 # Returns requested gcc specs directive unprocessed - for used by
508 # gcc-specs-directive()
509 # Note; later specs normally overwrite earlier ones; however if a later
510 # spec starts with '+' then it appends.
511 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
512 # as "Reading <file>", in order. Strictly speaking, if there's a
513 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
514 # the same token anything from 'gcc -dumpspecs' is overridden by
515 # the contents of $(gcc_install_dir)/specs so the result is the
516 # same either way.
517 _gcc-specs-directive_raw() {
518 local cc=$(tc-getCC)
519 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
520 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
521 'BEGIN { pspec=""; spec=""; outside=1 }
522 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
523 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
524 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
525 { spec=spec $0 }
526 END { print spec }'
527 return 0
528 }
529
530 # Return the requested gcc specs directive, with all included
531 # specs expanded.
532 # Note, it does not check for inclusion loops, which cause it
533 # to never finish - but such loops are invalid for gcc and we're
534 # assuming gcc is operational.
535 gcc-specs-directive() {
536 local directive subdname subdirective
537 directive="$(_gcc-specs-directive_raw $1)"
538 while [[ ${directive} == *%\(*\)* ]]; do
539 subdname=${directive/*%\(}
540 subdname=${subdname/\)*}
541 subdirective="$(_gcc-specs-directive_raw ${subdname})"
542 directive="${directive//\%(${subdname})/${subdirective}}"
543 done
544 echo "${directive}"
545 return 0
546 }
547
548 # Returns true if gcc sets relro
549 gcc-specs-relro() {
550 local directive
551 directive=$(gcc-specs-directive link_command)
552 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
553 }
554 # Returns true if gcc sets now
555 gcc-specs-now() {
556 local directive
557 directive=$(gcc-specs-directive link_command)
558 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
559 }
560 # Returns true if gcc builds PIEs
561 gcc-specs-pie() {
562 local directive
563 directive=$(gcc-specs-directive cc1)
564 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
565 }
566 # Returns true if gcc builds with the stack protector
567 gcc-specs-ssp() {
568 local directive
569 directive=$(gcc-specs-directive cc1)
570 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
571 }
572 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
573 gcc-specs-ssp-to-all() {
574 local directive
575 directive=$(gcc-specs-directive cc1)
576 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
577 }
578 # Returns true if gcc builds with fno-strict-overflow
579 gcc-specs-nostrict() {
580 local directive
581 directive=$(gcc-specs-directive cc1)
582 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
583 }
584
585
586 # @FUNCTION: gen_usr_ldscript
587 # @USAGE: [-a] <list of libs to create linker scripts for>
588 # @DESCRIPTION:
589 # This function generate linker scripts in /usr/lib for dynamic
590 # libs in /lib. This is to fix linking problems when you have
591 # the .so in /lib, and the .a in /usr/lib. What happens is that
592 # in some cases when linking dynamic, the .a in /usr/lib is used
593 # instead of the .so in /lib due to gcc/libtool tweaking ld's
594 # library search path. This causes many builds to fail.
595 # See bug #4411 for more info.
596 #
597 # Note that you should in general use the unversioned name of
598 # the library (libfoo.so), as ldconfig should usually update it
599 # correctly to point to the latest version of the library present.
600 gen_usr_ldscript() {
601 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
602 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
603
604 tc-is-static-only && return
605
606 # Just make sure it exists
607 dodir /usr/${libdir}
608
609 if [[ $1 == "-a" ]] ; then
610 auto=true
611 shift
612 dodir /${libdir}
613 fi
614
615 # OUTPUT_FORMAT gives hints to the linker as to what binary format
616 # is referenced ... makes multilib saner
617 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
618 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
619
620 for lib in "$@" ; do
621 local tlib
622 if ${auto} ; then
623 lib="lib${lib}${suffix}"
624 else
625 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
626 # This especially is for AIX where $(get_libname) can return ".a",
627 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
628 [[ -r ${ED}/${libdir}/${lib} ]] || continue
629 #TODO: better die here?
630 fi
631
632 case ${CTARGET:-${CHOST}} in
633 *-darwin*)
634 if ${auto} ; then
635 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
636 else
637 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
638 fi
639 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
640 tlib=${tlib##*/}
641
642 if ${auto} ; then
643 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
644 # some install_names are funky: they encode a version
645 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
646 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
647 fi
648 rm -f "${ED}"/${libdir}/${lib}
649 fi
650
651 # Mach-O files have an id, which is like a soname, it tells how
652 # another object linking against this lib should reference it.
653 # Since we moved the lib from usr/lib into lib this reference is
654 # wrong. Hence, we update it here. We don't configure with
655 # libdir=/lib because that messes up libtool files.
656 # Make sure we don't lose the specific version, so just modify the
657 # existing install_name
658 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
659 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
660 local nowrite=yes
661 fi
662 install_name_tool \
663 -id "${EPREFIX}"/${libdir}/${tlib} \
664 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
665 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
666 # Now as we don't use GNU binutils and our linker doesn't
667 # understand linker scripts, just create a symlink.
668 pushd "${ED}/usr/${libdir}" > /dev/null
669 ln -snf "../../${libdir}/${tlib}" "${lib}"
670 popd > /dev/null
671 ;;
672 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
673 if ${auto} ; then
674 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
675 # no way to retrieve soname on these platforms (?)
676 tlib=$(readlink "${ED}"/${libdir}/${lib})
677 tlib=${tlib##*/}
678 if [[ -z ${tlib} ]] ; then
679 # ok, apparently was not a symlink, don't remove it and
680 # just link to it
681 tlib=${lib}
682 else
683 rm -f "${ED}"/${libdir}/${lib}
684 fi
685 else
686 tlib=${lib}
687 fi
688
689 # we don't have GNU binutils on these platforms, so we symlink
690 # instead, which seems to work fine. Keep it relative, otherwise
691 # we break some QA checks in Portage
692 # on interix, the linker scripts would work fine in _most_
693 # situations. if a library links to such a linker script the
694 # absolute path to the correct library is inserted into the binary,
695 # which is wrong, since anybody linking _without_ libtool will miss
696 # some dependencies, since the stupid linker cannot find libraries
697 # hardcoded with absolute paths (as opposed to the loader, which
698 # seems to be able to do this).
699 # this has been seen while building shared-mime-info which needs
700 # libxml2, but links without libtool (and does not add libz to the
701 # command line by itself).
702 pushd "${ED}/usr/${libdir}" > /dev/null
703 ln -snf "../../${libdir}/${tlib}" "${lib}"
704 popd > /dev/null
705 ;;
706 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
707 if ${auto} ; then
708 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
709 [[ -z ${tlib} ]] && tlib=${lib}
710 tlib=${tlib##*/} # 'internal name' can have a path component
711 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
712 # some SONAMEs are funky: they encode a version before the .so
713 if [[ ${tlib} != ${lib}* ]] ; then
714 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
715 fi
716 [[ ${tlib} != ${lib} ]] &&
717 rm -f "${ED}"/${libdir}/${lib}
718 else
719 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
720 [[ -z ${tlib} ]] && tlib=${lib}
721 tlib=${tlib##*/} # 'internal name' can have a path component
722 fi
723 pushd "${ED}"/usr/${libdir} >/dev/null
724 ln -snf "../../${libdir}/${tlib}" "${lib}"
725 # need the internal name in usr/lib too, to be available at runtime
726 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
727 [[ ${tlib} != ${lib} ]] &&
728 ln -snf "../../${libdir}/${tlib}" "${tlib}"
729 popd >/dev/null
730 ;;
731 *)
732 if ${auto} ; then
733 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
734 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
735 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
736 # some SONAMEs are funky: they encode a version before the .so
737 if [[ ${tlib} != ${lib}* ]] ; then
738 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
739 fi
740 rm -f "${ED}"/${libdir}/${lib}
741 else
742 tlib=${lib}
743 fi
744 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
745 /* GNU ld script
746 Since Gentoo has critical dynamic libraries in /lib, and the static versions
747 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
748 run into linking problems. This "fake" dynamic lib is a linker script that
749 redirects the linker to the real lib. And yes, this works in the cross-
750 compiling scenario as the sysroot-ed linker will prepend the real path.
751
752 See bug http://bugs.gentoo.org/4411 for more info.
753 */
754 ${output_format}
755 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
756 END_LDSCRIPT
757 ;;
758 esac
759 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
760 done
761 }

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