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Revision 1.135 - (show annotations) (download)
Mon Mar 16 21:12:27 2015 UTC (10 days, 1 hour ago) by vapier
Branch: MAIN
CVS Tags: HEAD
Changes since 1.134: +67 -0 lines
tc-ld-is-gold/tc-ld-disable-gold: add helpers for detecting & disabling gold

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

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