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Revision 1.136 - (show annotations) (download)
Tue Mar 31 04:27:29 2015 UTC (3 years, 3 months ago) by vapier
Branch: MAIN
Changes since 1.135: +6 -3 lines
tc-export_build_env: export BUILD_CPPFLAGS/BUILD_LDFLAGS to non-empty values so they do not get defaulted by build systems #526734 by Matthias Maier

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 1.135 2015/03/16 21:12:27 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 local bfd_ld="$(tc-getLD "$@").bfd"
356 local path_ld=$(which "${bfd_ld}" 2>/dev/null)
357 [[ -e ${path_ld} ]] && export LD=${bfd_ld}
358
359 # Set up LDFLAGS to select gold based on the gcc version.
360 local major=$(gcc-major-version "$@")
361 local minor=$(gcc-minor-version "$@")
362 if [[ ${major} -lt 4 ]] || [[ ${major} -eq 4 && ${minor} -lt 8 ]] ; then
363 # <=gcc-4.7 requires some coercion. Only works if bfd exists.
364 if [[ -e ${path_ld} ]] ; then
365 local d="${T}/bfd-linker"
366 mkdir -p "${d}"
367 ln -sf "${path_ld}" "${d}"/ld
368 export LDFLAGS="${LDFLAGS} -B${d}"
369 else
370 die "unable to locate a BFD linker to bypass gold"
371 fi
372 else
373 # gcc-4.8+ supports -fuse-ld directly.
374 export LDFLAGS="${LDFLAGS} -fuse-ld=bfd"
375 fi
376 }
377
378 # @FUNCTION: tc-has-openmp
379 # @USAGE: [toolchain prefix]
380 # @DESCRIPTION:
381 # See if the toolchain supports OpenMP.
382 tc-has-openmp() {
383 local base="${T}/test-tc-openmp"
384 cat <<-EOF > "${base}.c"
385 #include <omp.h>
386 int main() {
387 int nthreads, tid, ret = 0;
388 #pragma omp parallel private(nthreads, tid)
389 {
390 tid = omp_get_thread_num();
391 nthreads = omp_get_num_threads(); ret += tid + nthreads;
392 }
393 return ret;
394 }
395 EOF
396 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
397 local ret=$?
398 rm -f "${base}"*
399 return ${ret}
400 }
401
402 # @FUNCTION: tc-has-tls
403 # @USAGE: [-s|-c|-l] [toolchain prefix]
404 # @DESCRIPTION:
405 # See if the toolchain supports thread local storage (TLS). Use -s to test the
406 # compiler, -c to also test the assembler, and -l to also test the C library
407 # (the default).
408 tc-has-tls() {
409 local base="${T}/test-tc-tls"
410 cat <<-EOF > "${base}.c"
411 int foo(int *i) {
412 static __thread int j = 0;
413 return *i ? j : *i;
414 }
415 EOF
416 local flags
417 case $1 in
418 -s) flags="-S";;
419 -c) flags="-c";;
420 -l) ;;
421 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
422 esac
423 : ${flags:=-fPIC -shared -Wl,-z,defs}
424 [[ $1 == -* ]] && shift
425 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
426 local ret=$?
427 rm -f "${base}"*
428 return ${ret}
429 }
430
431
432 # Parse information from CBUILD/CHOST/CTARGET rather than
433 # use external variables from the profile.
434 tc-ninja_magic_to_arch() {
435 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
436
437 local type=$1
438 local host=$2
439 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
440
441 local KV=${KV:-${KV_FULL}}
442 [[ ${type} == "kern" ]] && [[ -z ${KV} ]] && \
443 ewarn "QA: Kernel version could not be determined, please inherit kernel-2 or linux-info"
444
445 case ${host} in
446 aarch64*) echo arm64;;
447 alpha*) echo alpha;;
448 arm*) echo arm;;
449 avr*) ninj avr32 avr;;
450 bfin*) ninj blackfin bfin;;
451 c6x*) echo c6x;;
452 cris*) echo cris;;
453 frv*) echo frv;;
454 hexagon*) echo hexagon;;
455 hppa*) ninj parisc hppa;;
456 i?86*)
457 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
458 # trees have been unified into 'x86'.
459 # FreeBSD still uses i386
460 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
461 echo i386
462 else
463 echo x86
464 fi
465 ;;
466 ia64*) echo ia64;;
467 m68*) echo m68k;;
468 metag*) echo metag;;
469 microblaze*) echo microblaze;;
470 mips*) echo mips;;
471 nios2*) echo nios2;;
472 nios*) echo nios;;
473 or32*) echo openrisc;;
474 powerpc*)
475 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
476 # have been unified into simply 'powerpc', but until 2.6.16,
477 # ppc32 is still using ARCH="ppc" as default
478 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
479 echo powerpc
480 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
481 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
482 echo powerpc
483 else
484 echo ppc
485 fi
486 elif [[ ${host} == powerpc64* ]] ; then
487 echo ppc64
488 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
489 ninj ppc64 ppc
490 else
491 echo ppc
492 fi
493 ;;
494 riscv*) echo riscv;;
495 s390*) echo s390;;
496 score*) echo score;;
497 sh64*) ninj sh64 sh;;
498 sh*) echo sh;;
499 sparc64*) ninj sparc64 sparc;;
500 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
501 && ninj sparc64 sparc \
502 || echo sparc
503 ;;
504 tile*) echo tile;;
505 vax*) echo vax;;
506 x86_64*freebsd*) echo amd64;;
507 x86_64*)
508 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
509 # trees have been unified into 'x86'.
510 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
511 echo x86
512 else
513 ninj x86_64 amd64
514 fi
515 ;;
516 xtensa*) echo xtensa;;
517
518 # since our usage of tc-arch is largely concerned with
519 # normalizing inputs for testing ${CTARGET}, let's filter
520 # other cross targets (mingw and such) into the unknown.
521 *) echo unknown;;
522 esac
523 }
524 # @FUNCTION: tc-arch-kernel
525 # @USAGE: [toolchain prefix]
526 # @RETURN: name of the kernel arch according to the compiler target
527 tc-arch-kernel() {
528 tc-ninja_magic_to_arch kern "$@"
529 }
530 # @FUNCTION: tc-arch
531 # @USAGE: [toolchain prefix]
532 # @RETURN: name of the portage arch according to the compiler target
533 tc-arch() {
534 tc-ninja_magic_to_arch portage "$@"
535 }
536
537 tc-endian() {
538 local host=$1
539 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
540 host=${host%%-*}
541
542 case ${host} in
543 aarch64*be) echo big;;
544 aarch64) echo little;;
545 alpha*) echo big;;
546 arm*b*) echo big;;
547 arm*) echo little;;
548 cris*) echo little;;
549 hppa*) echo big;;
550 i?86*) echo little;;
551 ia64*) echo little;;
552 m68*) echo big;;
553 mips*l*) echo little;;
554 mips*) echo big;;
555 powerpc*le) echo little;;
556 powerpc*) echo big;;
557 s390*) echo big;;
558 sh*b*) echo big;;
559 sh*) echo little;;
560 sparc*) echo big;;
561 x86_64*) echo little;;
562 *) echo wtf;;
563 esac
564 }
565
566 # Internal func. The first argument is the version info to expand.
567 # Query the preprocessor to improve compatibility across different
568 # compilers rather than maintaining a --version flag matrix. #335943
569 _gcc_fullversion() {
570 local ver="$1"; shift
571 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
572 eval echo "$ver"
573 }
574
575 # @FUNCTION: gcc-fullversion
576 # @RETURN: compiler version (major.minor.micro: [3.4.6])
577 gcc-fullversion() {
578 _gcc_fullversion '$1.$2.$3' "$@"
579 }
580 # @FUNCTION: gcc-version
581 # @RETURN: compiler version (major.minor: [3.4].6)
582 gcc-version() {
583 _gcc_fullversion '$1.$2' "$@"
584 }
585 # @FUNCTION: gcc-major-version
586 # @RETURN: major compiler version (major: [3].4.6)
587 gcc-major-version() {
588 _gcc_fullversion '$1' "$@"
589 }
590 # @FUNCTION: gcc-minor-version
591 # @RETURN: minor compiler version (minor: 3.[4].6)
592 gcc-minor-version() {
593 _gcc_fullversion '$2' "$@"
594 }
595 # @FUNCTION: gcc-micro-version
596 # @RETURN: micro compiler version (micro: 3.4.[6])
597 gcc-micro-version() {
598 _gcc_fullversion '$3' "$@"
599 }
600
601 # Returns the installation directory - internal toolchain
602 # function for use by _gcc-specs-exists (for flag-o-matic).
603 _gcc-install-dir() {
604 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
605 awk '$1=="install:" {print $2}')"
606 }
607 # Returns true if the indicated specs file exists - internal toolchain
608 # function for use by flag-o-matic.
609 _gcc-specs-exists() {
610 [[ -f $(_gcc-install-dir)/$1 ]]
611 }
612
613 # Returns requested gcc specs directive unprocessed - for used by
614 # gcc-specs-directive()
615 # Note; later specs normally overwrite earlier ones; however if a later
616 # spec starts with '+' then it appends.
617 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
618 # as "Reading <file>", in order. Strictly speaking, if there's a
619 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
620 # the same token anything from 'gcc -dumpspecs' is overridden by
621 # the contents of $(gcc_install_dir)/specs so the result is the
622 # same either way.
623 _gcc-specs-directive_raw() {
624 local cc=$(tc-getCC)
625 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
626 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
627 'BEGIN { pspec=""; spec=""; outside=1 }
628 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
629 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
630 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
631 { spec=spec $0 }
632 END { print spec }'
633 return 0
634 }
635
636 # Return the requested gcc specs directive, with all included
637 # specs expanded.
638 # Note, it does not check for inclusion loops, which cause it
639 # to never finish - but such loops are invalid for gcc and we're
640 # assuming gcc is operational.
641 gcc-specs-directive() {
642 local directive subdname subdirective
643 directive="$(_gcc-specs-directive_raw $1)"
644 while [[ ${directive} == *%\(*\)* ]]; do
645 subdname=${directive/*%\(}
646 subdname=${subdname/\)*}
647 subdirective="$(_gcc-specs-directive_raw ${subdname})"
648 directive="${directive//\%(${subdname})/${subdirective}}"
649 done
650 echo "${directive}"
651 return 0
652 }
653
654 # Returns true if gcc sets relro
655 gcc-specs-relro() {
656 local directive
657 directive=$(gcc-specs-directive link_command)
658 [[ "${directive/\{!norelro:}" != "${directive}" ]]
659 }
660 # Returns true if gcc sets now
661 gcc-specs-now() {
662 local directive
663 directive=$(gcc-specs-directive link_command)
664 [[ "${directive/\{!nonow:}" != "${directive}" ]]
665 }
666 # Returns true if gcc builds PIEs
667 gcc-specs-pie() {
668 local directive
669 directive=$(gcc-specs-directive cc1)
670 [[ "${directive/\{!nopie:}" != "${directive}" ]]
671 }
672 # Returns true if gcc builds with the stack protector
673 gcc-specs-ssp() {
674 local directive
675 directive=$(gcc-specs-directive cc1)
676 [[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]]
677 }
678 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
679 gcc-specs-ssp-to-all() {
680 local directive
681 directive=$(gcc-specs-directive cc1)
682 [[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]]
683 }
684 # Returns true if gcc builds with fno-strict-overflow
685 gcc-specs-nostrict() {
686 local directive
687 directive=$(gcc-specs-directive cc1)
688 [[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]]
689 }
690 # Returns true if gcc builds with fstack-check
691 gcc-specs-stack-check() {
692 local directive
693 directive=$(gcc-specs-directive cc1)
694 [[ "${directive/\{!fno-stack-check:}" != "${directive}" ]]
695 }
696
697
698 # @FUNCTION: gen_usr_ldscript
699 # @USAGE: [-a] <list of libs to create linker scripts for>
700 # @DESCRIPTION:
701 # This function generate linker scripts in /usr/lib for dynamic
702 # libs in /lib. This is to fix linking problems when you have
703 # the .so in /lib, and the .a in /usr/lib. What happens is that
704 # in some cases when linking dynamic, the .a in /usr/lib is used
705 # instead of the .so in /lib due to gcc/libtool tweaking ld's
706 # library search path. This causes many builds to fail.
707 # See bug #4411 for more info.
708 #
709 # Note that you should in general use the unversioned name of
710 # the library (libfoo.so), as ldconfig should usually update it
711 # correctly to point to the latest version of the library present.
712 gen_usr_ldscript() {
713 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
714 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
715
716 tc-is-static-only && return
717
718 # Eventually we'd like to get rid of this func completely #417451
719 case ${CTARGET:-${CHOST}} in
720 *-darwin*) ;;
721 *linux*|*-freebsd*|*-openbsd*|*-netbsd*)
722 use prefix && return 0 ;;
723 *) return 0 ;;
724 esac
725
726 # Just make sure it exists
727 dodir /usr/${libdir}
728
729 if [[ $1 == "-a" ]] ; then
730 auto=true
731 shift
732 dodir /${libdir}
733 fi
734
735 # OUTPUT_FORMAT gives hints to the linker as to what binary format
736 # is referenced ... makes multilib saner
737 local flags=( ${CFLAGS} ${LDFLAGS} -Wl,--verbose )
738 if $(tc-getLD) --version | grep -q 'GNU gold' ; then
739 # If they're using gold, manually invoke the old bfd. #487696
740 local d="${T}/bfd-linker"
741 mkdir -p "${d}"
742 ln -sf $(which ${CHOST}-ld.bfd) "${d}"/ld
743 flags+=( -B"${d}" )
744 fi
745 output_format=$($(tc-getCC) "${flags[@]}" 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
746 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
747
748 for lib in "$@" ; do
749 local tlib
750 if ${auto} ; then
751 lib="lib${lib}${suffix}"
752 else
753 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
754 # This especially is for AIX where $(get_libname) can return ".a",
755 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
756 [[ -r ${ED}/${libdir}/${lib} ]] || continue
757 #TODO: better die here?
758 fi
759
760 case ${CTARGET:-${CHOST}} in
761 *-darwin*)
762 if ${auto} ; then
763 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
764 else
765 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
766 fi
767 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
768 tlib=${tlib##*/}
769
770 if ${auto} ; then
771 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
772 # some install_names are funky: they encode a version
773 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
774 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
775 fi
776 rm -f "${ED}"/${libdir}/${lib}
777 fi
778
779 # Mach-O files have an id, which is like a soname, it tells how
780 # another object linking against this lib should reference it.
781 # Since we moved the lib from usr/lib into lib this reference is
782 # wrong. Hence, we update it here. We don't configure with
783 # libdir=/lib because that messes up libtool files.
784 # Make sure we don't lose the specific version, so just modify the
785 # existing install_name
786 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
787 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
788 local nowrite=yes
789 fi
790 install_name_tool \
791 -id "${EPREFIX}"/${libdir}/${tlib} \
792 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
793 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
794 # Now as we don't use GNU binutils and our linker doesn't
795 # understand linker scripts, just create a symlink.
796 pushd "${ED}/usr/${libdir}" > /dev/null
797 ln -snf "../../${libdir}/${tlib}" "${lib}"
798 popd > /dev/null
799 ;;
800 *)
801 if ${auto} ; then
802 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
803 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
804 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
805 # some SONAMEs are funky: they encode a version before the .so
806 if [[ ${tlib} != ${lib}* ]] ; then
807 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
808 fi
809 rm -f "${ED}"/${libdir}/${lib}
810 else
811 tlib=${lib}
812 fi
813 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
814 /* GNU ld script
815 Since Gentoo has critical dynamic libraries in /lib, and the static versions
816 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
817 run into linking problems. This "fake" dynamic lib is a linker script that
818 redirects the linker to the real lib. And yes, this works in the cross-
819 compiling scenario as the sysroot-ed linker will prepend the real path.
820
821 See bug http://bugs.gentoo.org/4411 for more info.
822 */
823 ${output_format}
824 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
825 END_LDSCRIPT
826 ;;
827 esac
828 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
829 done
830 }
831
832 fi

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