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Revision 1.137 - (show annotations) (download)
Mon Apr 13 05:38:17 2015 UTC (6 days, 17 hours ago) by vapier
Branch: MAIN
CVS Tags: HEAD
Changes since 1.136: +5 -2 lines
tc-ld-disable-gold: handle LD having flags appended to it #545218

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 1.136 2015/03/31 04:27:29 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 # Some build envs will initialize vars like:
227 # : ${BUILD_LDFLAGS:-${LDFLAGS}}
228 # So make sure all variables are non-empty. #526734
229 : ${BUILD_CFLAGS:=-O1 -pipe}
230 : ${BUILD_CXXFLAGS:=-O1 -pipe}
231 : ${BUILD_CPPFLAGS:= }
232 : ${BUILD_LDFLAGS:= }
233 export BUILD_{C,CXX,CPP,LD}FLAGS
234
235 # Some packages use XXX_FOR_BUILD.
236 local v
237 for v in BUILD_{C,CXX,CPP,LD}FLAGS ; do
238 export ${v#BUILD_}_FOR_BUILD="${!v}"
239 done
240 }
241
242 # @FUNCTION: tc-env_build
243 # @USAGE: <command> [command args]
244 # @INTERNAL
245 # @DESCRIPTION:
246 # Setup the compile environment to the build tools and then execute the
247 # specified command. We use tc-getBUILD_XX here so that we work with
248 # all of the semi-[non-]standard env vars like $BUILD_CC which often
249 # the target build system does not check.
250 tc-env_build() {
251 tc-export_build_env
252 CFLAGS=${BUILD_CFLAGS} \
253 CXXFLAGS=${BUILD_CXXFLAGS} \
254 CPPFLAGS=${BUILD_CPPFLAGS} \
255 LDFLAGS=${BUILD_LDFLAGS} \
256 AR=$(tc-getBUILD_AR) \
257 AS=$(tc-getBUILD_AS) \
258 CC=$(tc-getBUILD_CC) \
259 CPP=$(tc-getBUILD_CPP) \
260 CXX=$(tc-getBUILD_CXX) \
261 LD=$(tc-getBUILD_LD) \
262 NM=$(tc-getBUILD_NM) \
263 PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
264 RANLIB=$(tc-getBUILD_RANLIB) \
265 "$@"
266 }
267
268 # @FUNCTION: econf_build
269 # @USAGE: [econf flags]
270 # @DESCRIPTION:
271 # Sometimes we need to locally build up some tools to run on CBUILD because
272 # the package has helper utils which are compiled+executed when compiling.
273 # This won't work when cross-compiling as the CHOST is set to a target which
274 # we cannot natively execute.
275 #
276 # For example, the python package will build up a local python binary using
277 # a portable build system (configure+make), but then use that binary to run
278 # local python scripts to build up other components of the overall python.
279 # We cannot rely on the python binary in $PATH as that often times will be
280 # a different version, or not even installed in the first place. Instead,
281 # we compile the code in a different directory to run on CBUILD, and then
282 # use that binary when compiling the main package to run on CHOST.
283 #
284 # For example, with newer EAPIs, you'd do something like:
285 # @CODE
286 # src_configure() {
287 # ECONF_SOURCE=${S}
288 # if tc-is-cross-compiler ; then
289 # mkdir "${WORKDIR}"/${CBUILD}
290 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
291 # econf_build --disable-some-unused-stuff
292 # popd >/dev/null
293 # fi
294 # ... normal build paths ...
295 # }
296 # src_compile() {
297 # if tc-is-cross-compiler ; then
298 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
299 # emake one-or-two-build-tools
300 # ln/mv build-tools to normal build paths in ${S}/
301 # popd >/dev/null
302 # fi
303 # ... normal build paths ...
304 # }
305 # @CODE
306 econf_build() {
307 local CBUILD=${CBUILD:-${CHOST}}
308 tc-env_build econf --build=${CBUILD} --host=${CBUILD} "$@"
309 }
310
311 # @FUNCTION: tc-ld-is-gold
312 # @USAGE: [toolchain prefix]
313 # @DESCRIPTION:
314 # Return true if the current linker is set to gold.
315 tc-ld-is-gold() {
316 local out
317
318 # First check the linker directly.
319 out=$($(tc-getLD "$@") --version 2>&1)
320 if [[ ${out} == *"GNU gold"* ]] ; then
321 return 0
322 fi
323
324 # Then see if they're selecting gold via compiler flags.
325 # Note: We're assuming they're using LDFLAGS to hold the
326 # options and not CFLAGS/CXXFLAGS.
327 local base="${T}/test-tc-gold"
328 cat <<-EOF > "${base}.c"
329 int main() { return 0; }
330 EOF
331 out=$($(tc-getCC "$@") ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} -Wl,--version "${base}.c" -o "${base}" 2>&1)
332 rm -f "${base}"*
333 if [[ ${out} == *"GNU gold"* ]] ; then
334 return 0
335 fi
336
337 # No gold here!
338 return 1
339 }
340
341 # @FUNCTION: tc-ld-disable-gold
342 # @USAGE: [toolchain prefix]
343 # @DESCRIPTION:
344 # If the gold linker is currently selected, configure the compilation
345 # settings so that we use the older bfd linker instead.
346 tc-ld-disable-gold() {
347 if ! tc-ld-is-gold "$@" ; then
348 # They aren't using gold, so nothing to do!
349 return
350 fi
351
352 ewarn "Forcing usage of the BFD linker instead of GOLD"
353
354 # Set up LD to point directly to bfd if it's available.
355 # We need to extract the first word in case there are flags appended
356 # to its value (like multilib). #545218
357 local ld=$(tc-getLD "$@")
358 local bfd_ld="${ld%% *}.bfd"
359 local path_ld=$(which "${bfd_ld}" 2>/dev/null)
360 [[ -e ${path_ld} ]] && export LD=${bfd_ld}
361
362 # Set up LDFLAGS to select gold based on the gcc version.
363 local major=$(gcc-major-version "$@")
364 local minor=$(gcc-minor-version "$@")
365 if [[ ${major} -lt 4 ]] || [[ ${major} -eq 4 && ${minor} -lt 8 ]] ; then
366 # <=gcc-4.7 requires some coercion. Only works if bfd exists.
367 if [[ -e ${path_ld} ]] ; then
368 local d="${T}/bfd-linker"
369 mkdir -p "${d}"
370 ln -sf "${path_ld}" "${d}"/ld
371 export LDFLAGS="${LDFLAGS} -B${d}"
372 else
373 die "unable to locate a BFD linker to bypass gold"
374 fi
375 else
376 # gcc-4.8+ supports -fuse-ld directly.
377 export LDFLAGS="${LDFLAGS} -fuse-ld=bfd"
378 fi
379 }
380
381 # @FUNCTION: tc-has-openmp
382 # @USAGE: [toolchain prefix]
383 # @DESCRIPTION:
384 # See if the toolchain supports OpenMP.
385 tc-has-openmp() {
386 local base="${T}/test-tc-openmp"
387 cat <<-EOF > "${base}.c"
388 #include <omp.h>
389 int main() {
390 int nthreads, tid, ret = 0;
391 #pragma omp parallel private(nthreads, tid)
392 {
393 tid = omp_get_thread_num();
394 nthreads = omp_get_num_threads(); ret += tid + nthreads;
395 }
396 return ret;
397 }
398 EOF
399 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
400 local ret=$?
401 rm -f "${base}"*
402 return ${ret}
403 }
404
405 # @FUNCTION: tc-has-tls
406 # @USAGE: [-s|-c|-l] [toolchain prefix]
407 # @DESCRIPTION:
408 # See if the toolchain supports thread local storage (TLS). Use -s to test the
409 # compiler, -c to also test the assembler, and -l to also test the C library
410 # (the default).
411 tc-has-tls() {
412 local base="${T}/test-tc-tls"
413 cat <<-EOF > "${base}.c"
414 int foo(int *i) {
415 static __thread int j = 0;
416 return *i ? j : *i;
417 }
418 EOF
419 local flags
420 case $1 in
421 -s) flags="-S";;
422 -c) flags="-c";;
423 -l) ;;
424 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
425 esac
426 : ${flags:=-fPIC -shared -Wl,-z,defs}
427 [[ $1 == -* ]] && shift
428 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
429 local ret=$?
430 rm -f "${base}"*
431 return ${ret}
432 }
433
434
435 # Parse information from CBUILD/CHOST/CTARGET rather than
436 # use external variables from the profile.
437 tc-ninja_magic_to_arch() {
438 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
439
440 local type=$1
441 local host=$2
442 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
443
444 local KV=${KV:-${KV_FULL}}
445 [[ ${type} == "kern" ]] && [[ -z ${KV} ]] && \
446 ewarn "QA: Kernel version could not be determined, please inherit kernel-2 or linux-info"
447
448 case ${host} in
449 aarch64*) echo arm64;;
450 alpha*) echo alpha;;
451 arm*) echo arm;;
452 avr*) ninj avr32 avr;;
453 bfin*) ninj blackfin bfin;;
454 c6x*) echo c6x;;
455 cris*) echo cris;;
456 frv*) echo frv;;
457 hexagon*) echo hexagon;;
458 hppa*) ninj parisc hppa;;
459 i?86*)
460 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
461 # trees have been unified into 'x86'.
462 # FreeBSD still uses i386
463 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
464 echo i386
465 else
466 echo x86
467 fi
468 ;;
469 ia64*) echo ia64;;
470 m68*) echo m68k;;
471 metag*) echo metag;;
472 microblaze*) echo microblaze;;
473 mips*) echo mips;;
474 nios2*) echo nios2;;
475 nios*) echo nios;;
476 or32*) echo openrisc;;
477 powerpc*)
478 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
479 # have been unified into simply 'powerpc', but until 2.6.16,
480 # ppc32 is still using ARCH="ppc" as default
481 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
482 echo powerpc
483 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
484 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
485 echo powerpc
486 else
487 echo ppc
488 fi
489 elif [[ ${host} == powerpc64* ]] ; then
490 echo ppc64
491 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
492 ninj ppc64 ppc
493 else
494 echo ppc
495 fi
496 ;;
497 riscv*) echo riscv;;
498 s390*) echo s390;;
499 score*) echo score;;
500 sh64*) ninj sh64 sh;;
501 sh*) echo sh;;
502 sparc64*) ninj sparc64 sparc;;
503 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
504 && ninj sparc64 sparc \
505 || echo sparc
506 ;;
507 tile*) echo tile;;
508 vax*) echo vax;;
509 x86_64*freebsd*) echo amd64;;
510 x86_64*)
511 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
512 # trees have been unified into 'x86'.
513 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
514 echo x86
515 else
516 ninj x86_64 amd64
517 fi
518 ;;
519 xtensa*) echo xtensa;;
520
521 # since our usage of tc-arch is largely concerned with
522 # normalizing inputs for testing ${CTARGET}, let's filter
523 # other cross targets (mingw and such) into the unknown.
524 *) echo unknown;;
525 esac
526 }
527 # @FUNCTION: tc-arch-kernel
528 # @USAGE: [toolchain prefix]
529 # @RETURN: name of the kernel arch according to the compiler target
530 tc-arch-kernel() {
531 tc-ninja_magic_to_arch kern "$@"
532 }
533 # @FUNCTION: tc-arch
534 # @USAGE: [toolchain prefix]
535 # @RETURN: name of the portage arch according to the compiler target
536 tc-arch() {
537 tc-ninja_magic_to_arch portage "$@"
538 }
539
540 tc-endian() {
541 local host=$1
542 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
543 host=${host%%-*}
544
545 case ${host} in
546 aarch64*be) echo big;;
547 aarch64) echo little;;
548 alpha*) echo big;;
549 arm*b*) echo big;;
550 arm*) echo little;;
551 cris*) echo little;;
552 hppa*) echo big;;
553 i?86*) echo little;;
554 ia64*) echo little;;
555 m68*) echo big;;
556 mips*l*) echo little;;
557 mips*) echo big;;
558 powerpc*le) echo little;;
559 powerpc*) echo big;;
560 s390*) echo big;;
561 sh*b*) echo big;;
562 sh*) echo little;;
563 sparc*) echo big;;
564 x86_64*) echo little;;
565 *) echo wtf;;
566 esac
567 }
568
569 # Internal func. The first argument is the version info to expand.
570 # Query the preprocessor to improve compatibility across different
571 # compilers rather than maintaining a --version flag matrix. #335943
572 _gcc_fullversion() {
573 local ver="$1"; shift
574 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
575 eval echo "$ver"
576 }
577
578 # @FUNCTION: gcc-fullversion
579 # @RETURN: compiler version (major.minor.micro: [3.4.6])
580 gcc-fullversion() {
581 _gcc_fullversion '$1.$2.$3' "$@"
582 }
583 # @FUNCTION: gcc-version
584 # @RETURN: compiler version (major.minor: [3.4].6)
585 gcc-version() {
586 _gcc_fullversion '$1.$2' "$@"
587 }
588 # @FUNCTION: gcc-major-version
589 # @RETURN: major compiler version (major: [3].4.6)
590 gcc-major-version() {
591 _gcc_fullversion '$1' "$@"
592 }
593 # @FUNCTION: gcc-minor-version
594 # @RETURN: minor compiler version (minor: 3.[4].6)
595 gcc-minor-version() {
596 _gcc_fullversion '$2' "$@"
597 }
598 # @FUNCTION: gcc-micro-version
599 # @RETURN: micro compiler version (micro: 3.4.[6])
600 gcc-micro-version() {
601 _gcc_fullversion '$3' "$@"
602 }
603
604 # Returns the installation directory - internal toolchain
605 # function for use by _gcc-specs-exists (for flag-o-matic).
606 _gcc-install-dir() {
607 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
608 awk '$1=="install:" {print $2}')"
609 }
610 # Returns true if the indicated specs file exists - internal toolchain
611 # function for use by flag-o-matic.
612 _gcc-specs-exists() {
613 [[ -f $(_gcc-install-dir)/$1 ]]
614 }
615
616 # Returns requested gcc specs directive unprocessed - for used by
617 # gcc-specs-directive()
618 # Note; later specs normally overwrite earlier ones; however if a later
619 # spec starts with '+' then it appends.
620 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
621 # as "Reading <file>", in order. Strictly speaking, if there's a
622 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
623 # the same token anything from 'gcc -dumpspecs' is overridden by
624 # the contents of $(gcc_install_dir)/specs so the result is the
625 # same either way.
626 _gcc-specs-directive_raw() {
627 local cc=$(tc-getCC)
628 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
629 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
630 'BEGIN { pspec=""; spec=""; outside=1 }
631 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
632 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
633 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
634 { spec=spec $0 }
635 END { print spec }'
636 return 0
637 }
638
639 # Return the requested gcc specs directive, with all included
640 # specs expanded.
641 # Note, it does not check for inclusion loops, which cause it
642 # to never finish - but such loops are invalid for gcc and we're
643 # assuming gcc is operational.
644 gcc-specs-directive() {
645 local directive subdname subdirective
646 directive="$(_gcc-specs-directive_raw $1)"
647 while [[ ${directive} == *%\(*\)* ]]; do
648 subdname=${directive/*%\(}
649 subdname=${subdname/\)*}
650 subdirective="$(_gcc-specs-directive_raw ${subdname})"
651 directive="${directive//\%(${subdname})/${subdirective}}"
652 done
653 echo "${directive}"
654 return 0
655 }
656
657 # Returns true if gcc sets relro
658 gcc-specs-relro() {
659 local directive
660 directive=$(gcc-specs-directive link_command)
661 [[ "${directive/\{!norelro:}" != "${directive}" ]]
662 }
663 # Returns true if gcc sets now
664 gcc-specs-now() {
665 local directive
666 directive=$(gcc-specs-directive link_command)
667 [[ "${directive/\{!nonow:}" != "${directive}" ]]
668 }
669 # Returns true if gcc builds PIEs
670 gcc-specs-pie() {
671 local directive
672 directive=$(gcc-specs-directive cc1)
673 [[ "${directive/\{!nopie:}" != "${directive}" ]]
674 }
675 # Returns true if gcc builds with the stack protector
676 gcc-specs-ssp() {
677 local directive
678 directive=$(gcc-specs-directive cc1)
679 [[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]]
680 }
681 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
682 gcc-specs-ssp-to-all() {
683 local directive
684 directive=$(gcc-specs-directive cc1)
685 [[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]]
686 }
687 # Returns true if gcc builds with fno-strict-overflow
688 gcc-specs-nostrict() {
689 local directive
690 directive=$(gcc-specs-directive cc1)
691 [[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]]
692 }
693 # Returns true if gcc builds with fstack-check
694 gcc-specs-stack-check() {
695 local directive
696 directive=$(gcc-specs-directive cc1)
697 [[ "${directive/\{!fno-stack-check:}" != "${directive}" ]]
698 }
699
700
701 # @FUNCTION: gen_usr_ldscript
702 # @USAGE: [-a] <list of libs to create linker scripts for>
703 # @DESCRIPTION:
704 # This function generate linker scripts in /usr/lib for dynamic
705 # libs in /lib. This is to fix linking problems when you have
706 # the .so in /lib, and the .a in /usr/lib. What happens is that
707 # in some cases when linking dynamic, the .a in /usr/lib is used
708 # instead of the .so in /lib due to gcc/libtool tweaking ld's
709 # library search path. This causes many builds to fail.
710 # See bug #4411 for more info.
711 #
712 # Note that you should in general use the unversioned name of
713 # the library (libfoo.so), as ldconfig should usually update it
714 # correctly to point to the latest version of the library present.
715 gen_usr_ldscript() {
716 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
717 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
718
719 tc-is-static-only && return
720
721 # Eventually we'd like to get rid of this func completely #417451
722 case ${CTARGET:-${CHOST}} in
723 *-darwin*) ;;
724 *linux*|*-freebsd*|*-openbsd*|*-netbsd*)
725 use prefix && return 0 ;;
726 *) return 0 ;;
727 esac
728
729 # Just make sure it exists
730 dodir /usr/${libdir}
731
732 if [[ $1 == "-a" ]] ; then
733 auto=true
734 shift
735 dodir /${libdir}
736 fi
737
738 # OUTPUT_FORMAT gives hints to the linker as to what binary format
739 # is referenced ... makes multilib saner
740 local flags=( ${CFLAGS} ${LDFLAGS} -Wl,--verbose )
741 if $(tc-getLD) --version | grep -q 'GNU gold' ; then
742 # If they're using gold, manually invoke the old bfd. #487696
743 local d="${T}/bfd-linker"
744 mkdir -p "${d}"
745 ln -sf $(which ${CHOST}-ld.bfd) "${d}"/ld
746 flags+=( -B"${d}" )
747 fi
748 output_format=$($(tc-getCC) "${flags[@]}" 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
749 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
750
751 for lib in "$@" ; do
752 local tlib
753 if ${auto} ; then
754 lib="lib${lib}${suffix}"
755 else
756 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
757 # This especially is for AIX where $(get_libname) can return ".a",
758 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
759 [[ -r ${ED}/${libdir}/${lib} ]] || continue
760 #TODO: better die here?
761 fi
762
763 case ${CTARGET:-${CHOST}} in
764 *-darwin*)
765 if ${auto} ; then
766 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
767 else
768 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
769 fi
770 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
771 tlib=${tlib##*/}
772
773 if ${auto} ; then
774 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
775 # some install_names are funky: they encode a version
776 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
777 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
778 fi
779 rm -f "${ED}"/${libdir}/${lib}
780 fi
781
782 # Mach-O files have an id, which is like a soname, it tells how
783 # another object linking against this lib should reference it.
784 # Since we moved the lib from usr/lib into lib this reference is
785 # wrong. Hence, we update it here. We don't configure with
786 # libdir=/lib because that messes up libtool files.
787 # Make sure we don't lose the specific version, so just modify the
788 # existing install_name
789 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
790 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
791 local nowrite=yes
792 fi
793 install_name_tool \
794 -id "${EPREFIX}"/${libdir}/${tlib} \
795 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
796 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
797 # Now as we don't use GNU binutils and our linker doesn't
798 # understand linker scripts, just create a symlink.
799 pushd "${ED}/usr/${libdir}" > /dev/null
800 ln -snf "../../${libdir}/${tlib}" "${lib}"
801 popd > /dev/null
802 ;;
803 *)
804 if ${auto} ; then
805 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
806 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
807 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
808 # some SONAMEs are funky: they encode a version before the .so
809 if [[ ${tlib} != ${lib}* ]] ; then
810 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
811 fi
812 rm -f "${ED}"/${libdir}/${lib}
813 else
814 tlib=${lib}
815 fi
816 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
817 /* GNU ld script
818 Since Gentoo has critical dynamic libraries in /lib, and the static versions
819 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
820 run into linking problems. This "fake" dynamic lib is a linker script that
821 redirects the linker to the real lib. And yes, this works in the cross-
822 compiling scenario as the sysroot-ed linker will prepend the real path.
823
824 See bug http://bugs.gentoo.org/4411 for more info.
825 */
826 ${output_format}
827 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
828 END_LDSCRIPT
829 ;;
830 esac
831 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
832 done
833 }
834
835 fi

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