/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.109 - (show annotations) (download)
Sat Dec 10 19:45:00 2011 UTC (2 years, 7 months ago) by vapier
Branch: MAIN
Changes since 1.108: +7 -3 lines
avoid multiple inclusions when possible to speed caching up

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 1.108 2011/10/17 19:11:49 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 if [[ ${___ECLASS_ONCE_TOOLCHAIN_FUNCS} != "recur -_+^+_- spank" ]] ; then
17 ___ECLASS_ONCE_TOOLCHAIN_FUNCS="recur -_+^+_- spank"
18
19 inherit multilib
20
21 DESCRIPTION="Based on the ${ECLASS} eclass"
22
23 # tc-getPROG <VAR [search vars]> <default> [tuple]
24 _tc-getPROG() {
25 local tuple=$1
26 local v var vars=$2
27 local prog=$3
28
29 var=${vars%% *}
30 for v in ${vars} ; do
31 if [[ -n ${!v} ]] ; then
32 export ${var}="${!v}"
33 echo "${!v}"
34 return 0
35 fi
36 done
37
38 local search=
39 [[ -n $4 ]] && search=$(type -p "$4-${prog}")
40 [[ -z ${search} && -n ${!tuple} ]] && search=$(type -p "${!tuple}-${prog}")
41 [[ -n ${search} ]] && prog=${search##*/}
42
43 export ${var}=${prog}
44 echo "${!var}"
45 }
46 tc-getBUILD_PROG() { _tc-getPROG CBUILD "BUILD_$1 $1_FOR_BUILD HOST$1" "${@:2}"; }
47 tc-getPROG() { _tc-getPROG CHOST "$@"; }
48
49 # @FUNCTION: tc-getAR
50 # @USAGE: [toolchain prefix]
51 # @RETURN: name of the archiver
52 tc-getAR() { tc-getPROG AR ar "$@"; }
53 # @FUNCTION: tc-getAS
54 # @USAGE: [toolchain prefix]
55 # @RETURN: name of the assembler
56 tc-getAS() { tc-getPROG AS as "$@"; }
57 # @FUNCTION: tc-getCC
58 # @USAGE: [toolchain prefix]
59 # @RETURN: name of the C compiler
60 tc-getCC() { tc-getPROG CC gcc "$@"; }
61 # @FUNCTION: tc-getCPP
62 # @USAGE: [toolchain prefix]
63 # @RETURN: name of the C preprocessor
64 tc-getCPP() { tc-getPROG CPP cpp "$@"; }
65 # @FUNCTION: tc-getCXX
66 # @USAGE: [toolchain prefix]
67 # @RETURN: name of the C++ compiler
68 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
69 # @FUNCTION: tc-getLD
70 # @USAGE: [toolchain prefix]
71 # @RETURN: name of the linker
72 tc-getLD() { tc-getPROG LD ld "$@"; }
73 # @FUNCTION: tc-getSTRIP
74 # @USAGE: [toolchain prefix]
75 # @RETURN: name of the strip program
76 tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
77 # @FUNCTION: tc-getNM
78 # @USAGE: [toolchain prefix]
79 # @RETURN: name of the symbol/object thingy
80 tc-getNM() { tc-getPROG NM nm "$@"; }
81 # @FUNCTION: tc-getRANLIB
82 # @USAGE: [toolchain prefix]
83 # @RETURN: name of the archiver indexer
84 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
85 # @FUNCTION: tc-getOBJCOPY
86 # @USAGE: [toolchain prefix]
87 # @RETURN: name of the object copier
88 tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
89 # @FUNCTION: tc-getF77
90 # @USAGE: [toolchain prefix]
91 # @RETURN: name of the Fortran 77 compiler
92 tc-getF77() { tc-getPROG F77 gfortran "$@"; }
93 # @FUNCTION: tc-getFC
94 # @USAGE: [toolchain prefix]
95 # @RETURN: name of the Fortran 90 compiler
96 tc-getFC() { tc-getPROG FC gfortran "$@"; }
97 # @FUNCTION: tc-getGCJ
98 # @USAGE: [toolchain prefix]
99 # @RETURN: name of the java compiler
100 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
101 # @FUNCTION: tc-getPKG_CONFIG
102 # @USAGE: [toolchain prefix]
103 # @RETURN: name of the pkg-config tool
104 tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
105 # @FUNCTION: tc-getRC
106 # @USAGE: [toolchain prefix]
107 # @RETURN: name of the Windows resource compiler
108 tc-getRC() { tc-getPROG RC windres "$@"; }
109 # @FUNCTION: tc-getDLLWRAP
110 # @USAGE: [toolchain prefix]
111 # @RETURN: name of the Windows dllwrap utility
112 tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
113
114 # @FUNCTION: tc-getBUILD_AR
115 # @USAGE: [toolchain prefix]
116 # @RETURN: name of the archiver for building binaries to run on the build machine
117 tc-getBUILD_AR() { tc-getBUILD_PROG AR ar "$@"; }
118 # @FUNCTION: tc-getBUILD_AS
119 # @USAGE: [toolchain prefix]
120 # @RETURN: name of the assembler for building binaries to run on the build machine
121 tc-getBUILD_AS() { tc-getBUILD_PROG AS as "$@"; }
122 # @FUNCTION: tc-getBUILD_CC
123 # @USAGE: [toolchain prefix]
124 # @RETURN: name of the C compiler for building binaries to run on the build machine
125 tc-getBUILD_CC() { tc-getBUILD_PROG CC gcc "$@"; }
126 # @FUNCTION: tc-getBUILD_CPP
127 # @USAGE: [toolchain prefix]
128 # @RETURN: name of the C preprocessor for building binaries to run on the build machine
129 tc-getBUILD_CPP() { tc-getBUILD_PROG CPP cpp "$@"; }
130 # @FUNCTION: tc-getBUILD_CXX
131 # @USAGE: [toolchain prefix]
132 # @RETURN: name of the C++ compiler for building binaries to run on the build machine
133 tc-getBUILD_CXX() { tc-getBUILD_PROG CXX g++ "$@"; }
134 # @FUNCTION: tc-getBUILD_LD
135 # @USAGE: [toolchain prefix]
136 # @RETURN: name of the linker for building binaries to run on the build machine
137 tc-getBUILD_LD() { tc-getBUILD_PROG LD ld "$@"; }
138 # @FUNCTION: tc-getBUILD_STRIP
139 # @USAGE: [toolchain prefix]
140 # @RETURN: name of the strip program for building binaries to run on the build machine
141 tc-getBUILD_STRIP() { tc-getBUILD_PROG STRIP strip "$@"; }
142 # @FUNCTION: tc-getBUILD_NM
143 # @USAGE: [toolchain prefix]
144 # @RETURN: name of the symbol/object thingy for building binaries to run on the build machine
145 tc-getBUILD_NM() { tc-getBUILD_PROG NM nm "$@"; }
146 # @FUNCTION: tc-getBUILD_RANLIB
147 # @USAGE: [toolchain prefix]
148 # @RETURN: name of the archiver indexer for building binaries to run on the build machine
149 tc-getBUILD_RANLIB() { tc-getBUILD_PROG RANLIB ranlib "$@"; }
150 # @FUNCTION: tc-getBUILD_OBJCOPY
151 # @USAGE: [toolchain prefix]
152 # @RETURN: name of the object copier for building binaries to run on the build machine
153 tc-getBUILD_OBJCOPY() { tc-getBUILD_PROG OBJCOPY objcopy "$@"; }
154 # @FUNCTION: tc-getBUILD_PKG_CONFIG
155 # @USAGE: [toolchain prefix]
156 # @RETURN: name of the pkg-config tool for building binaries to run on the build machine
157 tc-getBUILD_PKG_CONFIG() { tc-getBUILD_PROG PKG_CONFIG pkg-config "$@"; }
158
159 # @FUNCTION: tc-export
160 # @USAGE: <list of toolchain variables>
161 # @DESCRIPTION:
162 # Quick way to export a bunch of compiler vars at once.
163 tc-export() {
164 local var
165 for var in "$@" ; do
166 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
167 eval tc-get${var} > /dev/null
168 done
169 }
170
171 # @FUNCTION: tc-is-cross-compiler
172 # @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
173 tc-is-cross-compiler() {
174 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
175 }
176
177 # @FUNCTION: tc-is-softfloat
178 # @DESCRIPTION:
179 # See if this toolchain is a softfloat based one.
180 # @CODE
181 # The possible return values:
182 # - only: the target is always softfloat (never had fpu)
183 # - yes: the target should support softfloat
184 # - no: the target doesn't support softfloat
185 # @CODE
186 # This allows us to react differently where packages accept
187 # softfloat flags in the case where support is optional, but
188 # rejects softfloat flags where the target always lacks an fpu.
189 tc-is-softfloat() {
190 case ${CTARGET} in
191 bfin*|h8300*)
192 echo "only" ;;
193 *)
194 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
195 && echo "yes" \
196 || echo "no"
197 ;;
198 esac
199 }
200
201 # @FUNCTION: tc-is-hardfloat
202 # @DESCRIPTION:
203 # See if this toolchain is a hardfloat based one.
204 # @CODE
205 # The possible return values:
206 # - yes: the target should support hardfloat
207 # - no: the target doesn't support hardfloat
208 tc-is-hardfloat() {
209 [[ ${CTARGET//_/-} == *-hardfloat-* ]] \
210 && echo "yes" \
211 || echo "no"
212 }
213
214 # @FUNCTION: tc-is-static-only
215 # @DESCRIPTION:
216 # Return shell true if the target does not support shared libs, shell false
217 # otherwise.
218 tc-is-static-only() {
219 local host=${CTARGET:-${CHOST}}
220
221 # *MiNT doesn't have shared libraries, only platform so far
222 return $([[ ${host} == *-mint* ]])
223 }
224
225 # @FUNCTION: tc-env_build
226 # @USAGE: <command> [command args]
227 # @INTERNAL
228 # @DESCRIPTION:
229 # Setup the compile environment to the build tools and then execute the
230 # specified command. We use tc-getBUILD_XX here so that we work with
231 # all of the semi-[non-]standard env vars like $BUILD_CC which often
232 # the target build system does not check.
233 tc-env_build() {
234 CFLAGS=${BUILD_CFLAGS:--O1 -pipe} \
235 CXXFLAGS=${BUILD_CXXFLAGS:--O1 -pipe} \
236 CPPFLAGS=${BUILD_CPPFLAGS} \
237 LDFLAGS=${BUILD_LDFLAGS} \
238 AR=$(tc-getBUILD_AR) \
239 AS=$(tc-getBUILD_AS) \
240 CC=$(tc-getBUILD_CC) \
241 CPP=$(tc-getBUILD_CPP) \
242 CXX=$(tc-getBUILD_CXX) \
243 LD=$(tc-getBUILD_LD) \
244 NM=$(tc-getBUILD_NM) \
245 PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
246 RANLIB=$(tc-getBUILD_RANLIB) \
247 "$@"
248 }
249
250 # @FUNCTION: econf_build
251 # @USAGE: [econf flags]
252 # @DESCRIPTION:
253 # Sometimes we need to locally build up some tools to run on CBUILD because
254 # the package has helper utils which are compiled+executed when compiling.
255 # This won't work when cross-compiling as the CHOST is set to a target which
256 # we cannot natively execute.
257 #
258 # For example, the python package will build up a local python binary using
259 # a portable build system (configure+make), but then use that binary to run
260 # local python scripts to build up other components of the overall python.
261 # We cannot rely on the python binary in $PATH as that often times will be
262 # a different version, or not even installed in the first place. Instead,
263 # we compile the code in a different directory to run on CBUILD, and then
264 # use that binary when compiling the main package to run on CHOST.
265 #
266 # For example, with newer EAPIs, you'd do something like:
267 # @CODE
268 # src_configure() {
269 # ECONF_SOURCE=${S}
270 # if tc-is-cross-compiler ; then
271 # mkdir "${WORKDIR}"/${CBUILD}
272 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
273 # econf_build --disable-some-unused-stuff
274 # popd >/dev/null
275 # fi
276 # ... normal build paths ...
277 # }
278 # src_compile() {
279 # if tc-is-cross-compiler ; then
280 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
281 # emake one-or-two-build-tools
282 # ln/mv build-tools to normal build paths in ${S}/
283 # popd >/dev/null
284 # fi
285 # ... normal build paths ...
286 # }
287 # @CODE
288 econf_build() {
289 tc-env_build econf --build=${CBUILD:-${CHOST}} "$@"
290 }
291
292 # @FUNCTION: tc-has-openmp
293 # @USAGE: [toolchain prefix]
294 # @DESCRIPTION:
295 # See if the toolchain supports OpenMP.
296 tc-has-openmp() {
297 local base="${T}/test-tc-openmp"
298 cat <<-EOF > "${base}.c"
299 #include <omp.h>
300 int main() {
301 int nthreads, tid, ret = 0;
302 #pragma omp parallel private(nthreads, tid)
303 {
304 tid = omp_get_thread_num();
305 nthreads = omp_get_num_threads(); ret += tid + nthreads;
306 }
307 return ret;
308 }
309 EOF
310 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
311 local ret=$?
312 rm -f "${base}"*
313 return ${ret}
314 }
315
316 # @FUNCTION: tc-has-tls
317 # @USAGE: [-s|-c|-l] [toolchain prefix]
318 # @DESCRIPTION:
319 # See if the toolchain supports thread local storage (TLS). Use -s to test the
320 # compiler, -c to also test the assembler, and -l to also test the C library
321 # (the default).
322 tc-has-tls() {
323 local base="${T}/test-tc-tls"
324 cat <<-EOF > "${base}.c"
325 int foo(int *i) {
326 static __thread int j = 0;
327 return *i ? j : *i;
328 }
329 EOF
330 local flags
331 case $1 in
332 -s) flags="-S";;
333 -c) flags="-c";;
334 -l) ;;
335 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
336 esac
337 : ${flags:=-fPIC -shared -Wl,-z,defs}
338 [[ $1 == -* ]] && shift
339 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
340 local ret=$?
341 rm -f "${base}"*
342 return ${ret}
343 }
344
345
346 # Parse information from CBUILD/CHOST/CTARGET rather than
347 # use external variables from the profile.
348 tc-ninja_magic_to_arch() {
349 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
350
351 local type=$1
352 local host=$2
353 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
354
355 case ${host} in
356 alpha*) echo alpha;;
357 arm*) echo arm;;
358 avr*) ninj avr32 avr;;
359 bfin*) ninj blackfin bfin;;
360 cris*) echo cris;;
361 hppa*) ninj parisc hppa;;
362 i?86*)
363 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
364 # trees have been unified into 'x86'.
365 # FreeBSD still uses i386
366 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
367 echo i386
368 else
369 echo x86
370 fi
371 ;;
372 ia64*) echo ia64;;
373 m68*) echo m68k;;
374 mips*) echo mips;;
375 nios2*) echo nios2;;
376 nios*) echo nios;;
377 powerpc*)
378 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
379 # have been unified into simply 'powerpc', but until 2.6.16,
380 # ppc32 is still using ARCH="ppc" as default
381 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
382 echo powerpc
383 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
384 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
385 echo powerpc
386 else
387 echo ppc
388 fi
389 elif [[ ${host} == powerpc64* ]] ; then
390 echo ppc64
391 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
392 ninj ppc64 ppc
393 else
394 echo ppc
395 fi
396 ;;
397 s390*) echo s390;;
398 sh64*) ninj sh64 sh;;
399 sh*) echo sh;;
400 sparc64*) ninj sparc64 sparc;;
401 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
402 && ninj sparc64 sparc \
403 || echo sparc
404 ;;
405 vax*) echo vax;;
406 x86_64*freebsd*) echo amd64;;
407 x86_64*)
408 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
409 # trees have been unified into 'x86'.
410 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
411 echo x86
412 else
413 ninj x86_64 amd64
414 fi
415 ;;
416
417 # since our usage of tc-arch is largely concerned with
418 # normalizing inputs for testing ${CTARGET}, let's filter
419 # other cross targets (mingw and such) into the unknown.
420 *) echo unknown;;
421 esac
422 }
423 # @FUNCTION: tc-arch-kernel
424 # @USAGE: [toolchain prefix]
425 # @RETURN: name of the kernel arch according to the compiler target
426 tc-arch-kernel() {
427 tc-ninja_magic_to_arch kern "$@"
428 }
429 # @FUNCTION: tc-arch
430 # @USAGE: [toolchain prefix]
431 # @RETURN: name of the portage arch according to the compiler target
432 tc-arch() {
433 tc-ninja_magic_to_arch portage "$@"
434 }
435
436 tc-endian() {
437 local host=$1
438 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
439 host=${host%%-*}
440
441 case ${host} in
442 alpha*) echo big;;
443 arm*b*) echo big;;
444 arm*) echo little;;
445 cris*) echo little;;
446 hppa*) echo big;;
447 i?86*) echo little;;
448 ia64*) echo little;;
449 m68*) echo big;;
450 mips*l*) echo little;;
451 mips*) echo big;;
452 powerpc*) echo big;;
453 s390*) echo big;;
454 sh*b*) echo big;;
455 sh*) echo little;;
456 sparc*) echo big;;
457 x86_64*) echo little;;
458 *) echo wtf;;
459 esac
460 }
461
462 # Internal func. The first argument is the version info to expand.
463 # Query the preprocessor to improve compatibility across different
464 # compilers rather than maintaining a --version flag matrix. #335943
465 _gcc_fullversion() {
466 local ver="$1"; shift
467 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
468 eval echo "$ver"
469 }
470
471 # @FUNCTION: gcc-fullversion
472 # @RETURN: compiler version (major.minor.micro: [3.4.6])
473 gcc-fullversion() {
474 _gcc_fullversion '$1.$2.$3' "$@"
475 }
476 # @FUNCTION: gcc-version
477 # @RETURN: compiler version (major.minor: [3.4].6)
478 gcc-version() {
479 _gcc_fullversion '$1.$2' "$@"
480 }
481 # @FUNCTION: gcc-major-version
482 # @RETURN: major compiler version (major: [3].4.6)
483 gcc-major-version() {
484 _gcc_fullversion '$1' "$@"
485 }
486 # @FUNCTION: gcc-minor-version
487 # @RETURN: minor compiler version (minor: 3.[4].6)
488 gcc-minor-version() {
489 _gcc_fullversion '$2' "$@"
490 }
491 # @FUNCTION: gcc-micro-version
492 # @RETURN: micro compiler version (micro: 3.4.[6])
493 gcc-micro-version() {
494 _gcc_fullversion '$3' "$@"
495 }
496
497 # Returns the installation directory - internal toolchain
498 # function for use by _gcc-specs-exists (for flag-o-matic).
499 _gcc-install-dir() {
500 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
501 awk '$1=="install:" {print $2}')"
502 }
503 # Returns true if the indicated specs file exists - internal toolchain
504 # function for use by flag-o-matic.
505 _gcc-specs-exists() {
506 [[ -f $(_gcc-install-dir)/$1 ]]
507 }
508
509 # Returns requested gcc specs directive unprocessed - for used by
510 # gcc-specs-directive()
511 # Note; later specs normally overwrite earlier ones; however if a later
512 # spec starts with '+' then it appends.
513 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
514 # as "Reading <file>", in order. Strictly speaking, if there's a
515 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
516 # the same token anything from 'gcc -dumpspecs' is overridden by
517 # the contents of $(gcc_install_dir)/specs so the result is the
518 # same either way.
519 _gcc-specs-directive_raw() {
520 local cc=$(tc-getCC)
521 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
522 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
523 'BEGIN { pspec=""; spec=""; outside=1 }
524 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
525 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
526 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
527 { spec=spec $0 }
528 END { print spec }'
529 return 0
530 }
531
532 # Return the requested gcc specs directive, with all included
533 # specs expanded.
534 # Note, it does not check for inclusion loops, which cause it
535 # to never finish - but such loops are invalid for gcc and we're
536 # assuming gcc is operational.
537 gcc-specs-directive() {
538 local directive subdname subdirective
539 directive="$(_gcc-specs-directive_raw $1)"
540 while [[ ${directive} == *%\(*\)* ]]; do
541 subdname=${directive/*%\(}
542 subdname=${subdname/\)*}
543 subdirective="$(_gcc-specs-directive_raw ${subdname})"
544 directive="${directive//\%(${subdname})/${subdirective}}"
545 done
546 echo "${directive}"
547 return 0
548 }
549
550 # Returns true if gcc sets relro
551 gcc-specs-relro() {
552 local directive
553 directive=$(gcc-specs-directive link_command)
554 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
555 }
556 # Returns true if gcc sets now
557 gcc-specs-now() {
558 local directive
559 directive=$(gcc-specs-directive link_command)
560 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
561 }
562 # Returns true if gcc builds PIEs
563 gcc-specs-pie() {
564 local directive
565 directive=$(gcc-specs-directive cc1)
566 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
567 }
568 # Returns true if gcc builds with the stack protector
569 gcc-specs-ssp() {
570 local directive
571 directive=$(gcc-specs-directive cc1)
572 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
573 }
574 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
575 gcc-specs-ssp-to-all() {
576 local directive
577 directive=$(gcc-specs-directive cc1)
578 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
579 }
580 # Returns true if gcc builds with fno-strict-overflow
581 gcc-specs-nostrict() {
582 local directive
583 directive=$(gcc-specs-directive cc1)
584 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
585 }
586
587
588 # @FUNCTION: gen_usr_ldscript
589 # @USAGE: [-a] <list of libs to create linker scripts for>
590 # @DESCRIPTION:
591 # This function generate linker scripts in /usr/lib for dynamic
592 # libs in /lib. This is to fix linking problems when you have
593 # the .so in /lib, and the .a in /usr/lib. What happens is that
594 # in some cases when linking dynamic, the .a in /usr/lib is used
595 # instead of the .so in /lib due to gcc/libtool tweaking ld's
596 # library search path. This causes many builds to fail.
597 # See bug #4411 for more info.
598 #
599 # Note that you should in general use the unversioned name of
600 # the library (libfoo.so), as ldconfig should usually update it
601 # correctly to point to the latest version of the library present.
602 gen_usr_ldscript() {
603 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
604 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
605
606 tc-is-static-only && return
607
608 # Just make sure it exists
609 dodir /usr/${libdir}
610
611 if [[ $1 == "-a" ]] ; then
612 auto=true
613 shift
614 dodir /${libdir}
615 fi
616
617 # OUTPUT_FORMAT gives hints to the linker as to what binary format
618 # is referenced ... makes multilib saner
619 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
620 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
621
622 for lib in "$@" ; do
623 local tlib
624 if ${auto} ; then
625 lib="lib${lib}${suffix}"
626 else
627 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
628 # This especially is for AIX where $(get_libname) can return ".a",
629 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
630 [[ -r ${ED}/${libdir}/${lib} ]] || continue
631 #TODO: better die here?
632 fi
633
634 case ${CTARGET:-${CHOST}} in
635 *-darwin*)
636 if ${auto} ; then
637 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
638 else
639 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
640 fi
641 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
642 tlib=${tlib##*/}
643
644 if ${auto} ; then
645 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
646 # some install_names are funky: they encode a version
647 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
648 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
649 fi
650 rm -f "${ED}"/${libdir}/${lib}
651 fi
652
653 # Mach-O files have an id, which is like a soname, it tells how
654 # another object linking against this lib should reference it.
655 # Since we moved the lib from usr/lib into lib this reference is
656 # wrong. Hence, we update it here. We don't configure with
657 # libdir=/lib because that messes up libtool files.
658 # Make sure we don't lose the specific version, so just modify the
659 # existing install_name
660 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
661 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
662 local nowrite=yes
663 fi
664 install_name_tool \
665 -id "${EPREFIX}"/${libdir}/${tlib} \
666 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
667 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
668 # Now as we don't use GNU binutils and our linker doesn't
669 # understand linker scripts, just create a symlink.
670 pushd "${ED}/usr/${libdir}" > /dev/null
671 ln -snf "../../${libdir}/${tlib}" "${lib}"
672 popd > /dev/null
673 ;;
674 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
675 if ${auto} ; then
676 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
677 # no way to retrieve soname on these platforms (?)
678 tlib=$(readlink "${ED}"/${libdir}/${lib})
679 tlib=${tlib##*/}
680 if [[ -z ${tlib} ]] ; then
681 # ok, apparently was not a symlink, don't remove it and
682 # just link to it
683 tlib=${lib}
684 else
685 rm -f "${ED}"/${libdir}/${lib}
686 fi
687 else
688 tlib=${lib}
689 fi
690
691 # we don't have GNU binutils on these platforms, so we symlink
692 # instead, which seems to work fine. Keep it relative, otherwise
693 # we break some QA checks in Portage
694 # on interix, the linker scripts would work fine in _most_
695 # situations. if a library links to such a linker script the
696 # absolute path to the correct library is inserted into the binary,
697 # which is wrong, since anybody linking _without_ libtool will miss
698 # some dependencies, since the stupid linker cannot find libraries
699 # hardcoded with absolute paths (as opposed to the loader, which
700 # seems to be able to do this).
701 # this has been seen while building shared-mime-info which needs
702 # libxml2, but links without libtool (and does not add libz to the
703 # command line by itself).
704 pushd "${ED}/usr/${libdir}" > /dev/null
705 ln -snf "../../${libdir}/${tlib}" "${lib}"
706 popd > /dev/null
707 ;;
708 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
709 if ${auto} ; then
710 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
711 [[ -z ${tlib} ]] && tlib=${lib}
712 tlib=${tlib##*/} # 'internal name' can have a path component
713 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
714 # some SONAMEs are funky: they encode a version before the .so
715 if [[ ${tlib} != ${lib}* ]] ; then
716 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
717 fi
718 [[ ${tlib} != ${lib} ]] &&
719 rm -f "${ED}"/${libdir}/${lib}
720 else
721 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
722 [[ -z ${tlib} ]] && tlib=${lib}
723 tlib=${tlib##*/} # 'internal name' can have a path component
724 fi
725 pushd "${ED}"/usr/${libdir} >/dev/null
726 ln -snf "../../${libdir}/${tlib}" "${lib}"
727 # need the internal name in usr/lib too, to be available at runtime
728 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
729 [[ ${tlib} != ${lib} ]] &&
730 ln -snf "../../${libdir}/${tlib}" "${tlib}"
731 popd >/dev/null
732 ;;
733 *)
734 if ${auto} ; then
735 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
736 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
737 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
738 # some SONAMEs are funky: they encode a version before the .so
739 if [[ ${tlib} != ${lib}* ]] ; then
740 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
741 fi
742 rm -f "${ED}"/${libdir}/${lib}
743 else
744 tlib=${lib}
745 fi
746 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
747 /* GNU ld script
748 Since Gentoo has critical dynamic libraries in /lib, and the static versions
749 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
750 run into linking problems. This "fake" dynamic lib is a linker script that
751 redirects the linker to the real lib. And yes, this works in the cross-
752 compiling scenario as the sysroot-ed linker will prepend the real path.
753
754 See bug http://bugs.gentoo.org/4411 for more info.
755 */
756 ${output_format}
757 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
758 END_LDSCRIPT
759 ;;
760 esac
761 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
762 done
763 }
764
765 fi

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