/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.134 - (show annotations) (download)
Mon Mar 16 19:26:39 2015 UTC (4 years, 4 months ago) by vapier
Branch: MAIN
Changes since 1.133: +6 -2 lines
tc-getOBJDUMP: new helper a few ebuilds want

1 # Copyright 1999-2015 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 1.133 2015/03/10 17:56:30 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 [[ -z ${_TOOLCHAIN_FUNCS_ECLASS} ]]; then
17 _TOOLCHAIN_FUNCS_ECLASS=1
18
19 inherit multilib
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 "$@"; }
87 # @FUNCTION: tc-getOBJDUMP
88 # @USAGE: [toolchain prefix]
89 # @RETURN: name of the object dumper
90 tc-getOBJDUMP() { tc-getPROG OBJDUMP objdump "$@"; }
91 # @FUNCTION: tc-getF77
92 # @USAGE: [toolchain prefix]
93 # @RETURN: name of the Fortran 77 compiler
94 tc-getF77() { tc-getPROG F77 gfortran "$@"; }
95 # @FUNCTION: tc-getFC
96 # @USAGE: [toolchain prefix]
97 # @RETURN: name of the Fortran 90 compiler
98 tc-getFC() { tc-getPROG FC gfortran "$@"; }
99 # @FUNCTION: tc-getGCJ
100 # @USAGE: [toolchain prefix]
101 # @RETURN: name of the java compiler
102 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
103 # @FUNCTION: tc-getPKG_CONFIG
104 # @USAGE: [toolchain prefix]
105 # @RETURN: name of the pkg-config tool
106 tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
107 # @FUNCTION: tc-getRC
108 # @USAGE: [toolchain prefix]
109 # @RETURN: name of the Windows resource compiler
110 tc-getRC() { tc-getPROG RC windres "$@"; }
111 # @FUNCTION: tc-getDLLWRAP
112 # @USAGE: [toolchain prefix]
113 # @RETURN: name of the Windows dllwrap utility
114 tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
115
116 # @FUNCTION: tc-getBUILD_AR
117 # @USAGE: [toolchain prefix]
118 # @RETURN: name of the archiver for building binaries to run on the build machine
119 tc-getBUILD_AR() { tc-getBUILD_PROG AR ar "$@"; }
120 # @FUNCTION: tc-getBUILD_AS
121 # @USAGE: [toolchain prefix]
122 # @RETURN: name of the assembler for building binaries to run on the build machine
123 tc-getBUILD_AS() { tc-getBUILD_PROG AS as "$@"; }
124 # @FUNCTION: tc-getBUILD_CC
125 # @USAGE: [toolchain prefix]
126 # @RETURN: name of the C compiler for building binaries to run on the build machine
127 tc-getBUILD_CC() { tc-getBUILD_PROG CC gcc "$@"; }
128 # @FUNCTION: tc-getBUILD_CPP
129 # @USAGE: [toolchain prefix]
130 # @RETURN: name of the C preprocessor for building binaries to run on the build machine
131 tc-getBUILD_CPP() { tc-getBUILD_PROG CPP cpp "$@"; }
132 # @FUNCTION: tc-getBUILD_CXX
133 # @USAGE: [toolchain prefix]
134 # @RETURN: name of the C++ compiler for building binaries to run on the build machine
135 tc-getBUILD_CXX() { tc-getBUILD_PROG CXX g++ "$@"; }
136 # @FUNCTION: tc-getBUILD_LD
137 # @USAGE: [toolchain prefix]
138 # @RETURN: name of the linker for building binaries to run on the build machine
139 tc-getBUILD_LD() { tc-getBUILD_PROG LD ld "$@"; }
140 # @FUNCTION: tc-getBUILD_STRIP
141 # @USAGE: [toolchain prefix]
142 # @RETURN: name of the strip program for building binaries to run on the build machine
143 tc-getBUILD_STRIP() { tc-getBUILD_PROG STRIP strip "$@"; }
144 # @FUNCTION: tc-getBUILD_NM
145 # @USAGE: [toolchain prefix]
146 # @RETURN: name of the symbol/object thingy for building binaries to run on the build machine
147 tc-getBUILD_NM() { tc-getBUILD_PROG NM nm "$@"; }
148 # @FUNCTION: tc-getBUILD_RANLIB
149 # @USAGE: [toolchain prefix]
150 # @RETURN: name of the archiver indexer for building binaries to run on the build machine
151 tc-getBUILD_RANLIB() { tc-getBUILD_PROG RANLIB ranlib "$@"; }
152 # @FUNCTION: tc-getBUILD_OBJCOPY
153 # @USAGE: [toolchain prefix]
154 # @RETURN: name of the object copier for building binaries to run on the build machine
155 tc-getBUILD_OBJCOPY() { tc-getBUILD_PROG OBJCOPY objcopy "$@"; }
156 # @FUNCTION: tc-getBUILD_PKG_CONFIG
157 # @USAGE: [toolchain prefix]
158 # @RETURN: name of the pkg-config tool for building binaries to run on the build machine
159 tc-getBUILD_PKG_CONFIG() { tc-getBUILD_PROG PKG_CONFIG pkg-config "$@"; }
160
161 # @FUNCTION: tc-export
162 # @USAGE: <list of toolchain variables>
163 # @DESCRIPTION:
164 # Quick way to export a bunch of compiler vars at once.
165 tc-export() {
166 local var
167 for var in "$@" ; do
168 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
169 eval tc-get${var} > /dev/null
170 done
171 }
172
173 # @FUNCTION: tc-is-cross-compiler
174 # @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
175 tc-is-cross-compiler() {
176 [[ ${CBUILD:-${CHOST}} != ${CHOST} ]]
177 }
178
179 # @FUNCTION: tc-is-softfloat
180 # @DESCRIPTION:
181 # See if this toolchain is a softfloat based one.
182 # @CODE
183 # The possible return values:
184 # - only: the target is always softfloat (never had fpu)
185 # - yes: the target should support softfloat
186 # - softfp: (arm specific) the target should use hardfloat insns, but softfloat calling convention
187 # - no: the target doesn't support softfloat
188 # @CODE
189 # This allows us to react differently where packages accept
190 # softfloat flags in the case where support is optional, but
191 # rejects softfloat flags where the target always lacks an fpu.
192 tc-is-softfloat() {
193 local CTARGET=${CTARGET:-${CHOST}}
194 case ${CTARGET} in
195 bfin*|h8300*)
196 echo "only" ;;
197 *)
198 if [[ ${CTARGET//_/-} == *-softfloat-* ]] ; then
199 echo "yes"
200 elif [[ ${CTARGET//_/-} == *-softfp-* ]] ; then
201 echo "softfp"
202 else
203 echo "no"
204 fi
205 ;;
206 esac
207 }
208
209 # @FUNCTION: tc-is-static-only
210 # @DESCRIPTION:
211 # Return shell true if the target does not support shared libs, shell false
212 # otherwise.
213 tc-is-static-only() {
214 local host=${CTARGET:-${CHOST}}
215
216 # *MiNT doesn't have shared libraries, only platform so far
217 [[ ${host} == *-mint* ]]
218 }
219
220 # @FUNCTION: tc-export_build_env
221 # @USAGE: [compiler variables]
222 # @DESCRIPTION:
223 # Export common build related compiler settings.
224 tc-export_build_env() {
225 tc-export "$@"
226 : ${BUILD_CFLAGS:=-O1 -pipe}
227 : ${BUILD_CXXFLAGS:=-O1 -pipe}
228 : ${BUILD_CPPFLAGS:=}
229 : ${BUILD_LDFLAGS:=}
230 export BUILD_{C,CXX,CPP,LD}FLAGS
231
232 # Some packages use XXX_FOR_BUILD.
233 local v
234 for v in BUILD_{C,CXX,CPP,LD}FLAGS ; do
235 export ${v#BUILD_}_FOR_BUILD="${!v}"
236 done
237 }
238
239 # @FUNCTION: tc-env_build
240 # @USAGE: <command> [command args]
241 # @INTERNAL
242 # @DESCRIPTION:
243 # Setup the compile environment to the build tools and then execute the
244 # specified command. We use tc-getBUILD_XX here so that we work with
245 # all of the semi-[non-]standard env vars like $BUILD_CC which often
246 # the target build system does not check.
247 tc-env_build() {
248 tc-export_build_env
249 CFLAGS=${BUILD_CFLAGS} \
250 CXXFLAGS=${BUILD_CXXFLAGS} \
251 CPPFLAGS=${BUILD_CPPFLAGS} \
252 LDFLAGS=${BUILD_LDFLAGS} \
253 AR=$(tc-getBUILD_AR) \
254 AS=$(tc-getBUILD_AS) \
255 CC=$(tc-getBUILD_CC) \
256 CPP=$(tc-getBUILD_CPP) \
257 CXX=$(tc-getBUILD_CXX) \
258 LD=$(tc-getBUILD_LD) \
259 NM=$(tc-getBUILD_NM) \
260 PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
261 RANLIB=$(tc-getBUILD_RANLIB) \
262 "$@"
263 }
264
265 # @FUNCTION: econf_build
266 # @USAGE: [econf flags]
267 # @DESCRIPTION:
268 # Sometimes we need to locally build up some tools to run on CBUILD because
269 # the package has helper utils which are compiled+executed when compiling.
270 # This won't work when cross-compiling as the CHOST is set to a target which
271 # we cannot natively execute.
272 #
273 # For example, the python package will build up a local python binary using
274 # a portable build system (configure+make), but then use that binary to run
275 # local python scripts to build up other components of the overall python.
276 # We cannot rely on the python binary in $PATH as that often times will be
277 # a different version, or not even installed in the first place. Instead,
278 # we compile the code in a different directory to run on CBUILD, and then
279 # use that binary when compiling the main package to run on CHOST.
280 #
281 # For example, with newer EAPIs, you'd do something like:
282 # @CODE
283 # src_configure() {
284 # ECONF_SOURCE=${S}
285 # if tc-is-cross-compiler ; then
286 # mkdir "${WORKDIR}"/${CBUILD}
287 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
288 # econf_build --disable-some-unused-stuff
289 # popd >/dev/null
290 # fi
291 # ... normal build paths ...
292 # }
293 # src_compile() {
294 # if tc-is-cross-compiler ; then
295 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
296 # emake one-or-two-build-tools
297 # ln/mv build-tools to normal build paths in ${S}/
298 # popd >/dev/null
299 # fi
300 # ... normal build paths ...
301 # }
302 # @CODE
303 econf_build() {
304 local CBUILD=${CBUILD:-${CHOST}}
305 tc-env_build econf --build=${CBUILD} --host=${CBUILD} "$@"
306 }
307
308 # @FUNCTION: tc-has-openmp
309 # @USAGE: [toolchain prefix]
310 # @DESCRIPTION:
311 # See if the toolchain supports OpenMP.
312 tc-has-openmp() {
313 local base="${T}/test-tc-openmp"
314 cat <<-EOF > "${base}.c"
315 #include <omp.h>
316 int main() {
317 int nthreads, tid, ret = 0;
318 #pragma omp parallel private(nthreads, tid)
319 {
320 tid = omp_get_thread_num();
321 nthreads = omp_get_num_threads(); ret += tid + nthreads;
322 }
323 return ret;
324 }
325 EOF
326 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
327 local ret=$?
328 rm -f "${base}"*
329 return ${ret}
330 }
331
332 # @FUNCTION: tc-has-tls
333 # @USAGE: [-s|-c|-l] [toolchain prefix]
334 # @DESCRIPTION:
335 # See if the toolchain supports thread local storage (TLS). Use -s to test the
336 # compiler, -c to also test the assembler, and -l to also test the C library
337 # (the default).
338 tc-has-tls() {
339 local base="${T}/test-tc-tls"
340 cat <<-EOF > "${base}.c"
341 int foo(int *i) {
342 static __thread int j = 0;
343 return *i ? j : *i;
344 }
345 EOF
346 local flags
347 case $1 in
348 -s) flags="-S";;
349 -c) flags="-c";;
350 -l) ;;
351 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
352 esac
353 : ${flags:=-fPIC -shared -Wl,-z,defs}
354 [[ $1 == -* ]] && shift
355 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
356 local ret=$?
357 rm -f "${base}"*
358 return ${ret}
359 }
360
361
362 # Parse information from CBUILD/CHOST/CTARGET rather than
363 # use external variables from the profile.
364 tc-ninja_magic_to_arch() {
365 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
366
367 local type=$1
368 local host=$2
369 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
370
371 local KV=${KV:-${KV_FULL}}
372 [[ ${type} == "kern" ]] && [[ -z ${KV} ]] && \
373 ewarn "QA: Kernel version could not be determined, please inherit kernel-2 or linux-info"
374
375 case ${host} in
376 aarch64*) echo arm64;;
377 alpha*) echo alpha;;
378 arm*) echo arm;;
379 avr*) ninj avr32 avr;;
380 bfin*) ninj blackfin bfin;;
381 c6x*) echo c6x;;
382 cris*) echo cris;;
383 frv*) echo frv;;
384 hexagon*) echo hexagon;;
385 hppa*) ninj parisc hppa;;
386 i?86*)
387 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
388 # trees have been unified into 'x86'.
389 # FreeBSD still uses i386
390 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
391 echo i386
392 else
393 echo x86
394 fi
395 ;;
396 ia64*) echo ia64;;
397 m68*) echo m68k;;
398 metag*) echo metag;;
399 microblaze*) echo microblaze;;
400 mips*) echo mips;;
401 nios2*) echo nios2;;
402 nios*) echo nios;;
403 or32*) echo openrisc;;
404 powerpc*)
405 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
406 # have been unified into simply 'powerpc', but until 2.6.16,
407 # ppc32 is still using ARCH="ppc" as default
408 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
409 echo powerpc
410 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
411 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
412 echo powerpc
413 else
414 echo ppc
415 fi
416 elif [[ ${host} == powerpc64* ]] ; then
417 echo ppc64
418 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
419 ninj ppc64 ppc
420 else
421 echo ppc
422 fi
423 ;;
424 riscv*) echo riscv;;
425 s390*) echo s390;;
426 score*) echo score;;
427 sh64*) ninj sh64 sh;;
428 sh*) echo sh;;
429 sparc64*) ninj sparc64 sparc;;
430 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
431 && ninj sparc64 sparc \
432 || echo sparc
433 ;;
434 tile*) echo tile;;
435 vax*) echo vax;;
436 x86_64*freebsd*) echo amd64;;
437 x86_64*)
438 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
439 # trees have been unified into 'x86'.
440 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
441 echo x86
442 else
443 ninj x86_64 amd64
444 fi
445 ;;
446 xtensa*) echo xtensa;;
447
448 # since our usage of tc-arch is largely concerned with
449 # normalizing inputs for testing ${CTARGET}, let's filter
450 # other cross targets (mingw and such) into the unknown.
451 *) echo unknown;;
452 esac
453 }
454 # @FUNCTION: tc-arch-kernel
455 # @USAGE: [toolchain prefix]
456 # @RETURN: name of the kernel arch according to the compiler target
457 tc-arch-kernel() {
458 tc-ninja_magic_to_arch kern "$@"
459 }
460 # @FUNCTION: tc-arch
461 # @USAGE: [toolchain prefix]
462 # @RETURN: name of the portage arch according to the compiler target
463 tc-arch() {
464 tc-ninja_magic_to_arch portage "$@"
465 }
466
467 tc-endian() {
468 local host=$1
469 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
470 host=${host%%-*}
471
472 case ${host} in
473 aarch64*be) echo big;;
474 aarch64) echo little;;
475 alpha*) echo big;;
476 arm*b*) echo big;;
477 arm*) echo little;;
478 cris*) echo little;;
479 hppa*) echo big;;
480 i?86*) echo little;;
481 ia64*) echo little;;
482 m68*) echo big;;
483 mips*l*) echo little;;
484 mips*) echo big;;
485 powerpc*le) echo little;;
486 powerpc*) echo big;;
487 s390*) echo big;;
488 sh*b*) echo big;;
489 sh*) echo little;;
490 sparc*) echo big;;
491 x86_64*) echo little;;
492 *) echo wtf;;
493 esac
494 }
495
496 # Internal func. The first argument is the version info to expand.
497 # Query the preprocessor to improve compatibility across different
498 # compilers rather than maintaining a --version flag matrix. #335943
499 _gcc_fullversion() {
500 local ver="$1"; shift
501 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
502 eval echo "$ver"
503 }
504
505 # @FUNCTION: gcc-fullversion
506 # @RETURN: compiler version (major.minor.micro: [3.4.6])
507 gcc-fullversion() {
508 _gcc_fullversion '$1.$2.$3' "$@"
509 }
510 # @FUNCTION: gcc-version
511 # @RETURN: compiler version (major.minor: [3.4].6)
512 gcc-version() {
513 _gcc_fullversion '$1.$2' "$@"
514 }
515 # @FUNCTION: gcc-major-version
516 # @RETURN: major compiler version (major: [3].4.6)
517 gcc-major-version() {
518 _gcc_fullversion '$1' "$@"
519 }
520 # @FUNCTION: gcc-minor-version
521 # @RETURN: minor compiler version (minor: 3.[4].6)
522 gcc-minor-version() {
523 _gcc_fullversion '$2' "$@"
524 }
525 # @FUNCTION: gcc-micro-version
526 # @RETURN: micro compiler version (micro: 3.4.[6])
527 gcc-micro-version() {
528 _gcc_fullversion '$3' "$@"
529 }
530
531 # Returns the installation directory - internal toolchain
532 # function for use by _gcc-specs-exists (for flag-o-matic).
533 _gcc-install-dir() {
534 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
535 awk '$1=="install:" {print $2}')"
536 }
537 # Returns true if the indicated specs file exists - internal toolchain
538 # function for use by flag-o-matic.
539 _gcc-specs-exists() {
540 [[ -f $(_gcc-install-dir)/$1 ]]
541 }
542
543 # Returns requested gcc specs directive unprocessed - for used by
544 # gcc-specs-directive()
545 # Note; later specs normally overwrite earlier ones; however if a later
546 # spec starts with '+' then it appends.
547 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
548 # as "Reading <file>", in order. Strictly speaking, if there's a
549 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
550 # the same token anything from 'gcc -dumpspecs' is overridden by
551 # the contents of $(gcc_install_dir)/specs so the result is the
552 # same either way.
553 _gcc-specs-directive_raw() {
554 local cc=$(tc-getCC)
555 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
556 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
557 'BEGIN { pspec=""; spec=""; outside=1 }
558 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
559 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
560 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
561 { spec=spec $0 }
562 END { print spec }'
563 return 0
564 }
565
566 # Return the requested gcc specs directive, with all included
567 # specs expanded.
568 # Note, it does not check for inclusion loops, which cause it
569 # to never finish - but such loops are invalid for gcc and we're
570 # assuming gcc is operational.
571 gcc-specs-directive() {
572 local directive subdname subdirective
573 directive="$(_gcc-specs-directive_raw $1)"
574 while [[ ${directive} == *%\(*\)* ]]; do
575 subdname=${directive/*%\(}
576 subdname=${subdname/\)*}
577 subdirective="$(_gcc-specs-directive_raw ${subdname})"
578 directive="${directive//\%(${subdname})/${subdirective}}"
579 done
580 echo "${directive}"
581 return 0
582 }
583
584 # Returns true if gcc sets relro
585 gcc-specs-relro() {
586 local directive
587 directive=$(gcc-specs-directive link_command)
588 [[ "${directive/\{!norelro:}" != "${directive}" ]]
589 }
590 # Returns true if gcc sets now
591 gcc-specs-now() {
592 local directive
593 directive=$(gcc-specs-directive link_command)
594 [[ "${directive/\{!nonow:}" != "${directive}" ]]
595 }
596 # Returns true if gcc builds PIEs
597 gcc-specs-pie() {
598 local directive
599 directive=$(gcc-specs-directive cc1)
600 [[ "${directive/\{!nopie:}" != "${directive}" ]]
601 }
602 # Returns true if gcc builds with the stack protector
603 gcc-specs-ssp() {
604 local directive
605 directive=$(gcc-specs-directive cc1)
606 [[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]]
607 }
608 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
609 gcc-specs-ssp-to-all() {
610 local directive
611 directive=$(gcc-specs-directive cc1)
612 [[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]]
613 }
614 # Returns true if gcc builds with fno-strict-overflow
615 gcc-specs-nostrict() {
616 local directive
617 directive=$(gcc-specs-directive cc1)
618 [[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]]
619 }
620 # Returns true if gcc builds with fstack-check
621 gcc-specs-stack-check() {
622 local directive
623 directive=$(gcc-specs-directive cc1)
624 [[ "${directive/\{!fno-stack-check:}" != "${directive}" ]]
625 }
626
627
628 # @FUNCTION: gen_usr_ldscript
629 # @USAGE: [-a] <list of libs to create linker scripts for>
630 # @DESCRIPTION:
631 # This function generate linker scripts in /usr/lib for dynamic
632 # libs in /lib. This is to fix linking problems when you have
633 # the .so in /lib, and the .a in /usr/lib. What happens is that
634 # in some cases when linking dynamic, the .a in /usr/lib is used
635 # instead of the .so in /lib due to gcc/libtool tweaking ld's
636 # library search path. This causes many builds to fail.
637 # See bug #4411 for more info.
638 #
639 # Note that you should in general use the unversioned name of
640 # the library (libfoo.so), as ldconfig should usually update it
641 # correctly to point to the latest version of the library present.
642 gen_usr_ldscript() {
643 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
644 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
645
646 tc-is-static-only && return
647
648 # Eventually we'd like to get rid of this func completely #417451
649 case ${CTARGET:-${CHOST}} in
650 *-darwin*) ;;
651 *linux*|*-freebsd*|*-openbsd*|*-netbsd*)
652 use prefix && return 0 ;;
653 *) return 0 ;;
654 esac
655
656 # Just make sure it exists
657 dodir /usr/${libdir}
658
659 if [[ $1 == "-a" ]] ; then
660 auto=true
661 shift
662 dodir /${libdir}
663 fi
664
665 # OUTPUT_FORMAT gives hints to the linker as to what binary format
666 # is referenced ... makes multilib saner
667 local flags=( ${CFLAGS} ${LDFLAGS} -Wl,--verbose )
668 if $(tc-getLD) --version | grep -q 'GNU gold' ; then
669 # If they're using gold, manually invoke the old bfd. #487696
670 local d="${T}/bfd-linker"
671 mkdir -p "${d}"
672 ln -sf $(which ${CHOST}-ld.bfd) "${d}"/ld
673 flags+=( -B"${d}" )
674 fi
675 output_format=$($(tc-getCC) "${flags[@]}" 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
676 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
677
678 for lib in "$@" ; do
679 local tlib
680 if ${auto} ; then
681 lib="lib${lib}${suffix}"
682 else
683 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
684 # This especially is for AIX where $(get_libname) can return ".a",
685 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
686 [[ -r ${ED}/${libdir}/${lib} ]] || continue
687 #TODO: better die here?
688 fi
689
690 case ${CTARGET:-${CHOST}} in
691 *-darwin*)
692 if ${auto} ; then
693 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
694 else
695 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
696 fi
697 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
698 tlib=${tlib##*/}
699
700 if ${auto} ; then
701 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
702 # some install_names are funky: they encode a version
703 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
704 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
705 fi
706 rm -f "${ED}"/${libdir}/${lib}
707 fi
708
709 # Mach-O files have an id, which is like a soname, it tells how
710 # another object linking against this lib should reference it.
711 # Since we moved the lib from usr/lib into lib this reference is
712 # wrong. Hence, we update it here. We don't configure with
713 # libdir=/lib because that messes up libtool files.
714 # Make sure we don't lose the specific version, so just modify the
715 # existing install_name
716 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
717 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
718 local nowrite=yes
719 fi
720 install_name_tool \
721 -id "${EPREFIX}"/${libdir}/${tlib} \
722 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
723 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
724 # Now as we don't use GNU binutils and our linker doesn't
725 # understand linker scripts, just create a symlink.
726 pushd "${ED}/usr/${libdir}" > /dev/null
727 ln -snf "../../${libdir}/${tlib}" "${lib}"
728 popd > /dev/null
729 ;;
730 *)
731 if ${auto} ; then
732 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
733 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
734 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
735 # some SONAMEs are funky: they encode a version before the .so
736 if [[ ${tlib} != ${lib}* ]] ; then
737 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
738 fi
739 rm -f "${ED}"/${libdir}/${lib}
740 else
741 tlib=${lib}
742 fi
743 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
744 /* GNU ld script
745 Since Gentoo has critical dynamic libraries in /lib, and the static versions
746 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
747 run into linking problems. This "fake" dynamic lib is a linker script that
748 redirects the linker to the real lib. And yes, this works in the cross-
749 compiling scenario as the sysroot-ed linker will prepend the real path.
750
751 See bug http://bugs.gentoo.org/4411 for more info.
752 */
753 ${output_format}
754 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
755 END_LDSCRIPT
756 ;;
757 esac
758 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
759 done
760 }
761
762 fi

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