/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.110 - (show annotations) (download)
Thu May 10 03:31:22 2012 UTC (2 years, 4 months ago) by vapier
Branch: MAIN
Changes since 1.109: +2 -1 lines
have tc-is-cross-compiler default to CHOST if CTARGET isnt set #414527 by Raúl Porcel

1 # Copyright 1999-2011 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.109 2011/12/10 19:45:00 vapier Exp $
4
5 # @ECLASS: toolchain-funcs.eclass
6 # @MAINTAINER:
7 # Toolchain Ninjas <toolchain@gentoo.org>
8 # @BLURB: functions to query common info about the toolchain
9 # @DESCRIPTION:
10 # The toolchain-funcs aims to provide a complete suite of functions
11 # for gleaning useful information about the toolchain and to simplify
12 # ugly things like cross-compiling and multilib. All of this is done
13 # in such a way that you can rely on the function always returning
14 # something sane.
15
16 if [[ ${___ECLASS_ONCE_TOOLCHAIN_FUNCS} != "recur -_+^+_- spank" ]] ; then
17 ___ECLASS_ONCE_TOOLCHAIN_FUNCS="recur -_+^+_- spank"
18
19 inherit multilib
20
21 DESCRIPTION="Based on the ${ECLASS} eclass"
22
23 # tc-getPROG <VAR [search vars]> <default> [tuple]
24 _tc-getPROG() {
25 local tuple=$1
26 local v var vars=$2
27 local prog=$3
28
29 var=${vars%% *}
30 for v in ${vars} ; do
31 if [[ -n ${!v} ]] ; then
32 export ${var}="${!v}"
33 echo "${!v}"
34 return 0
35 fi
36 done
37
38 local search=
39 [[ -n $4 ]] && search=$(type -p "$4-${prog}")
40 [[ -z ${search} && -n ${!tuple} ]] && search=$(type -p "${!tuple}-${prog}")
41 [[ -n ${search} ]] && prog=${search##*/}
42
43 export ${var}=${prog}
44 echo "${!var}"
45 }
46 tc-getBUILD_PROG() { _tc-getPROG CBUILD "BUILD_$1 $1_FOR_BUILD HOST$1" "${@:2}"; }
47 tc-getPROG() { _tc-getPROG CHOST "$@"; }
48
49 # @FUNCTION: tc-getAR
50 # @USAGE: [toolchain prefix]
51 # @RETURN: name of the archiver
52 tc-getAR() { tc-getPROG AR ar "$@"; }
53 # @FUNCTION: tc-getAS
54 # @USAGE: [toolchain prefix]
55 # @RETURN: name of the assembler
56 tc-getAS() { tc-getPROG AS as "$@"; }
57 # @FUNCTION: tc-getCC
58 # @USAGE: [toolchain prefix]
59 # @RETURN: name of the C compiler
60 tc-getCC() { tc-getPROG CC gcc "$@"; }
61 # @FUNCTION: tc-getCPP
62 # @USAGE: [toolchain prefix]
63 # @RETURN: name of the C preprocessor
64 tc-getCPP() { tc-getPROG CPP cpp "$@"; }
65 # @FUNCTION: tc-getCXX
66 # @USAGE: [toolchain prefix]
67 # @RETURN: name of the C++ compiler
68 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
69 # @FUNCTION: tc-getLD
70 # @USAGE: [toolchain prefix]
71 # @RETURN: name of the linker
72 tc-getLD() { tc-getPROG LD ld "$@"; }
73 # @FUNCTION: tc-getSTRIP
74 # @USAGE: [toolchain prefix]
75 # @RETURN: name of the strip program
76 tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
77 # @FUNCTION: tc-getNM
78 # @USAGE: [toolchain prefix]
79 # @RETURN: name of the symbol/object thingy
80 tc-getNM() { tc-getPROG NM nm "$@"; }
81 # @FUNCTION: tc-getRANLIB
82 # @USAGE: [toolchain prefix]
83 # @RETURN: name of the archiver indexer
84 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
85 # @FUNCTION: tc-getOBJCOPY
86 # @USAGE: [toolchain prefix]
87 # @RETURN: name of the object copier
88 tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
89 # @FUNCTION: tc-getF77
90 # @USAGE: [toolchain prefix]
91 # @RETURN: name of the Fortran 77 compiler
92 tc-getF77() { tc-getPROG F77 gfortran "$@"; }
93 # @FUNCTION: tc-getFC
94 # @USAGE: [toolchain prefix]
95 # @RETURN: name of the Fortran 90 compiler
96 tc-getFC() { tc-getPROG FC gfortran "$@"; }
97 # @FUNCTION: tc-getGCJ
98 # @USAGE: [toolchain prefix]
99 # @RETURN: name of the java compiler
100 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
101 # @FUNCTION: tc-getPKG_CONFIG
102 # @USAGE: [toolchain prefix]
103 # @RETURN: name of the pkg-config tool
104 tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
105 # @FUNCTION: tc-getRC
106 # @USAGE: [toolchain prefix]
107 # @RETURN: name of the Windows resource compiler
108 tc-getRC() { tc-getPROG RC windres "$@"; }
109 # @FUNCTION: tc-getDLLWRAP
110 # @USAGE: [toolchain prefix]
111 # @RETURN: name of the Windows dllwrap utility
112 tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
113
114 # @FUNCTION: tc-getBUILD_AR
115 # @USAGE: [toolchain prefix]
116 # @RETURN: name of the archiver for building binaries to run on the build machine
117 tc-getBUILD_AR() { tc-getBUILD_PROG AR ar "$@"; }
118 # @FUNCTION: tc-getBUILD_AS
119 # @USAGE: [toolchain prefix]
120 # @RETURN: name of the assembler for building binaries to run on the build machine
121 tc-getBUILD_AS() { tc-getBUILD_PROG AS as "$@"; }
122 # @FUNCTION: tc-getBUILD_CC
123 # @USAGE: [toolchain prefix]
124 # @RETURN: name of the C compiler for building binaries to run on the build machine
125 tc-getBUILD_CC() { tc-getBUILD_PROG CC gcc "$@"; }
126 # @FUNCTION: tc-getBUILD_CPP
127 # @USAGE: [toolchain prefix]
128 # @RETURN: name of the C preprocessor for building binaries to run on the build machine
129 tc-getBUILD_CPP() { tc-getBUILD_PROG CPP cpp "$@"; }
130 # @FUNCTION: tc-getBUILD_CXX
131 # @USAGE: [toolchain prefix]
132 # @RETURN: name of the C++ compiler for building binaries to run on the build machine
133 tc-getBUILD_CXX() { tc-getBUILD_PROG CXX g++ "$@"; }
134 # @FUNCTION: tc-getBUILD_LD
135 # @USAGE: [toolchain prefix]
136 # @RETURN: name of the linker for building binaries to run on the build machine
137 tc-getBUILD_LD() { tc-getBUILD_PROG LD ld "$@"; }
138 # @FUNCTION: tc-getBUILD_STRIP
139 # @USAGE: [toolchain prefix]
140 # @RETURN: name of the strip program for building binaries to run on the build machine
141 tc-getBUILD_STRIP() { tc-getBUILD_PROG STRIP strip "$@"; }
142 # @FUNCTION: tc-getBUILD_NM
143 # @USAGE: [toolchain prefix]
144 # @RETURN: name of the symbol/object thingy for building binaries to run on the build machine
145 tc-getBUILD_NM() { tc-getBUILD_PROG NM nm "$@"; }
146 # @FUNCTION: tc-getBUILD_RANLIB
147 # @USAGE: [toolchain prefix]
148 # @RETURN: name of the archiver indexer for building binaries to run on the build machine
149 tc-getBUILD_RANLIB() { tc-getBUILD_PROG RANLIB ranlib "$@"; }
150 # @FUNCTION: tc-getBUILD_OBJCOPY
151 # @USAGE: [toolchain prefix]
152 # @RETURN: name of the object copier for building binaries to run on the build machine
153 tc-getBUILD_OBJCOPY() { tc-getBUILD_PROG OBJCOPY objcopy "$@"; }
154 # @FUNCTION: tc-getBUILD_PKG_CONFIG
155 # @USAGE: [toolchain prefix]
156 # @RETURN: name of the pkg-config tool for building binaries to run on the build machine
157 tc-getBUILD_PKG_CONFIG() { tc-getBUILD_PROG PKG_CONFIG pkg-config "$@"; }
158
159 # @FUNCTION: tc-export
160 # @USAGE: <list of toolchain variables>
161 # @DESCRIPTION:
162 # Quick way to export a bunch of compiler vars at once.
163 tc-export() {
164 local var
165 for var in "$@" ; do
166 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
167 eval tc-get${var} > /dev/null
168 done
169 }
170
171 # @FUNCTION: tc-is-cross-compiler
172 # @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
173 tc-is-cross-compiler() {
174 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
175 }
176
177 # @FUNCTION: tc-is-softfloat
178 # @DESCRIPTION:
179 # See if this toolchain is a softfloat based one.
180 # @CODE
181 # The possible return values:
182 # - only: the target is always softfloat (never had fpu)
183 # - yes: the target should support softfloat
184 # - no: the target doesn't support softfloat
185 # @CODE
186 # This allows us to react differently where packages accept
187 # softfloat flags in the case where support is optional, but
188 # rejects softfloat flags where the target always lacks an fpu.
189 tc-is-softfloat() {
190 local CTARGET=${CTARGET:-${CHOST}}
191 case ${CTARGET} in
192 bfin*|h8300*)
193 echo "only" ;;
194 *)
195 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
196 && echo "yes" \
197 || echo "no"
198 ;;
199 esac
200 }
201
202 # @FUNCTION: tc-is-hardfloat
203 # @DESCRIPTION:
204 # See if this toolchain is a hardfloat based one.
205 # @CODE
206 # The possible return values:
207 # - yes: the target should support hardfloat
208 # - no: the target doesn't support hardfloat
209 tc-is-hardfloat() {
210 [[ ${CTARGET//_/-} == *-hardfloat-* ]] \
211 && echo "yes" \
212 || echo "no"
213 }
214
215 # @FUNCTION: tc-is-static-only
216 # @DESCRIPTION:
217 # Return shell true if the target does not support shared libs, shell false
218 # otherwise.
219 tc-is-static-only() {
220 local host=${CTARGET:-${CHOST}}
221
222 # *MiNT doesn't have shared libraries, only platform so far
223 return $([[ ${host} == *-mint* ]])
224 }
225
226 # @FUNCTION: tc-env_build
227 # @USAGE: <command> [command args]
228 # @INTERNAL
229 # @DESCRIPTION:
230 # Setup the compile environment to the build tools and then execute the
231 # specified command. We use tc-getBUILD_XX here so that we work with
232 # all of the semi-[non-]standard env vars like $BUILD_CC which often
233 # the target build system does not check.
234 tc-env_build() {
235 CFLAGS=${BUILD_CFLAGS:--O1 -pipe} \
236 CXXFLAGS=${BUILD_CXXFLAGS:--O1 -pipe} \
237 CPPFLAGS=${BUILD_CPPFLAGS} \
238 LDFLAGS=${BUILD_LDFLAGS} \
239 AR=$(tc-getBUILD_AR) \
240 AS=$(tc-getBUILD_AS) \
241 CC=$(tc-getBUILD_CC) \
242 CPP=$(tc-getBUILD_CPP) \
243 CXX=$(tc-getBUILD_CXX) \
244 LD=$(tc-getBUILD_LD) \
245 NM=$(tc-getBUILD_NM) \
246 PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
247 RANLIB=$(tc-getBUILD_RANLIB) \
248 "$@"
249 }
250
251 # @FUNCTION: econf_build
252 # @USAGE: [econf flags]
253 # @DESCRIPTION:
254 # Sometimes we need to locally build up some tools to run on CBUILD because
255 # the package has helper utils which are compiled+executed when compiling.
256 # This won't work when cross-compiling as the CHOST is set to a target which
257 # we cannot natively execute.
258 #
259 # For example, the python package will build up a local python binary using
260 # a portable build system (configure+make), but then use that binary to run
261 # local python scripts to build up other components of the overall python.
262 # We cannot rely on the python binary in $PATH as that often times will be
263 # a different version, or not even installed in the first place. Instead,
264 # we compile the code in a different directory to run on CBUILD, and then
265 # use that binary when compiling the main package to run on CHOST.
266 #
267 # For example, with newer EAPIs, you'd do something like:
268 # @CODE
269 # src_configure() {
270 # ECONF_SOURCE=${S}
271 # if tc-is-cross-compiler ; then
272 # mkdir "${WORKDIR}"/${CBUILD}
273 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
274 # econf_build --disable-some-unused-stuff
275 # popd >/dev/null
276 # fi
277 # ... normal build paths ...
278 # }
279 # src_compile() {
280 # if tc-is-cross-compiler ; then
281 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
282 # emake one-or-two-build-tools
283 # ln/mv build-tools to normal build paths in ${S}/
284 # popd >/dev/null
285 # fi
286 # ... normal build paths ...
287 # }
288 # @CODE
289 econf_build() {
290 tc-env_build econf --build=${CBUILD:-${CHOST}} "$@"
291 }
292
293 # @FUNCTION: tc-has-openmp
294 # @USAGE: [toolchain prefix]
295 # @DESCRIPTION:
296 # See if the toolchain supports OpenMP.
297 tc-has-openmp() {
298 local base="${T}/test-tc-openmp"
299 cat <<-EOF > "${base}.c"
300 #include <omp.h>
301 int main() {
302 int nthreads, tid, ret = 0;
303 #pragma omp parallel private(nthreads, tid)
304 {
305 tid = omp_get_thread_num();
306 nthreads = omp_get_num_threads(); ret += tid + nthreads;
307 }
308 return ret;
309 }
310 EOF
311 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
312 local ret=$?
313 rm -f "${base}"*
314 return ${ret}
315 }
316
317 # @FUNCTION: tc-has-tls
318 # @USAGE: [-s|-c|-l] [toolchain prefix]
319 # @DESCRIPTION:
320 # See if the toolchain supports thread local storage (TLS). Use -s to test the
321 # compiler, -c to also test the assembler, and -l to also test the C library
322 # (the default).
323 tc-has-tls() {
324 local base="${T}/test-tc-tls"
325 cat <<-EOF > "${base}.c"
326 int foo(int *i) {
327 static __thread int j = 0;
328 return *i ? j : *i;
329 }
330 EOF
331 local flags
332 case $1 in
333 -s) flags="-S";;
334 -c) flags="-c";;
335 -l) ;;
336 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
337 esac
338 : ${flags:=-fPIC -shared -Wl,-z,defs}
339 [[ $1 == -* ]] && shift
340 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
341 local ret=$?
342 rm -f "${base}"*
343 return ${ret}
344 }
345
346
347 # Parse information from CBUILD/CHOST/CTARGET rather than
348 # use external variables from the profile.
349 tc-ninja_magic_to_arch() {
350 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
351
352 local type=$1
353 local host=$2
354 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
355
356 case ${host} in
357 alpha*) echo alpha;;
358 arm*) echo arm;;
359 avr*) ninj avr32 avr;;
360 bfin*) ninj blackfin bfin;;
361 cris*) echo cris;;
362 hppa*) ninj parisc hppa;;
363 i?86*)
364 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
365 # trees have been unified into 'x86'.
366 # FreeBSD still uses i386
367 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
368 echo i386
369 else
370 echo x86
371 fi
372 ;;
373 ia64*) echo ia64;;
374 m68*) echo m68k;;
375 mips*) echo mips;;
376 nios2*) echo nios2;;
377 nios*) echo nios;;
378 powerpc*)
379 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
380 # have been unified into simply 'powerpc', but until 2.6.16,
381 # ppc32 is still using ARCH="ppc" as default
382 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
383 echo powerpc
384 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
385 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
386 echo powerpc
387 else
388 echo ppc
389 fi
390 elif [[ ${host} == powerpc64* ]] ; then
391 echo ppc64
392 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
393 ninj ppc64 ppc
394 else
395 echo ppc
396 fi
397 ;;
398 s390*) echo s390;;
399 sh64*) ninj sh64 sh;;
400 sh*) echo sh;;
401 sparc64*) ninj sparc64 sparc;;
402 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
403 && ninj sparc64 sparc \
404 || echo sparc
405 ;;
406 vax*) echo vax;;
407 x86_64*freebsd*) echo amd64;;
408 x86_64*)
409 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
410 # trees have been unified into 'x86'.
411 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
412 echo x86
413 else
414 ninj x86_64 amd64
415 fi
416 ;;
417
418 # since our usage of tc-arch is largely concerned with
419 # normalizing inputs for testing ${CTARGET}, let's filter
420 # other cross targets (mingw and such) into the unknown.
421 *) echo unknown;;
422 esac
423 }
424 # @FUNCTION: tc-arch-kernel
425 # @USAGE: [toolchain prefix]
426 # @RETURN: name of the kernel arch according to the compiler target
427 tc-arch-kernel() {
428 tc-ninja_magic_to_arch kern "$@"
429 }
430 # @FUNCTION: tc-arch
431 # @USAGE: [toolchain prefix]
432 # @RETURN: name of the portage arch according to the compiler target
433 tc-arch() {
434 tc-ninja_magic_to_arch portage "$@"
435 }
436
437 tc-endian() {
438 local host=$1
439 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
440 host=${host%%-*}
441
442 case ${host} in
443 alpha*) echo big;;
444 arm*b*) echo big;;
445 arm*) echo little;;
446 cris*) echo little;;
447 hppa*) echo big;;
448 i?86*) echo little;;
449 ia64*) echo little;;
450 m68*) echo big;;
451 mips*l*) echo little;;
452 mips*) echo big;;
453 powerpc*) echo big;;
454 s390*) echo big;;
455 sh*b*) echo big;;
456 sh*) echo little;;
457 sparc*) echo big;;
458 x86_64*) echo little;;
459 *) echo wtf;;
460 esac
461 }
462
463 # Internal func. The first argument is the version info to expand.
464 # Query the preprocessor to improve compatibility across different
465 # compilers rather than maintaining a --version flag matrix. #335943
466 _gcc_fullversion() {
467 local ver="$1"; shift
468 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
469 eval echo "$ver"
470 }
471
472 # @FUNCTION: gcc-fullversion
473 # @RETURN: compiler version (major.minor.micro: [3.4.6])
474 gcc-fullversion() {
475 _gcc_fullversion '$1.$2.$3' "$@"
476 }
477 # @FUNCTION: gcc-version
478 # @RETURN: compiler version (major.minor: [3.4].6)
479 gcc-version() {
480 _gcc_fullversion '$1.$2' "$@"
481 }
482 # @FUNCTION: gcc-major-version
483 # @RETURN: major compiler version (major: [3].4.6)
484 gcc-major-version() {
485 _gcc_fullversion '$1' "$@"
486 }
487 # @FUNCTION: gcc-minor-version
488 # @RETURN: minor compiler version (minor: 3.[4].6)
489 gcc-minor-version() {
490 _gcc_fullversion '$2' "$@"
491 }
492 # @FUNCTION: gcc-micro-version
493 # @RETURN: micro compiler version (micro: 3.4.[6])
494 gcc-micro-version() {
495 _gcc_fullversion '$3' "$@"
496 }
497
498 # Returns the installation directory - internal toolchain
499 # function for use by _gcc-specs-exists (for flag-o-matic).
500 _gcc-install-dir() {
501 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
502 awk '$1=="install:" {print $2}')"
503 }
504 # Returns true if the indicated specs file exists - internal toolchain
505 # function for use by flag-o-matic.
506 _gcc-specs-exists() {
507 [[ -f $(_gcc-install-dir)/$1 ]]
508 }
509
510 # Returns requested gcc specs directive unprocessed - for used by
511 # gcc-specs-directive()
512 # Note; later specs normally overwrite earlier ones; however if a later
513 # spec starts with '+' then it appends.
514 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
515 # as "Reading <file>", in order. Strictly speaking, if there's a
516 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
517 # the same token anything from 'gcc -dumpspecs' is overridden by
518 # the contents of $(gcc_install_dir)/specs so the result is the
519 # same either way.
520 _gcc-specs-directive_raw() {
521 local cc=$(tc-getCC)
522 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
523 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
524 'BEGIN { pspec=""; spec=""; outside=1 }
525 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
526 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
527 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
528 { spec=spec $0 }
529 END { print spec }'
530 return 0
531 }
532
533 # Return the requested gcc specs directive, with all included
534 # specs expanded.
535 # Note, it does not check for inclusion loops, which cause it
536 # to never finish - but such loops are invalid for gcc and we're
537 # assuming gcc is operational.
538 gcc-specs-directive() {
539 local directive subdname subdirective
540 directive="$(_gcc-specs-directive_raw $1)"
541 while [[ ${directive} == *%\(*\)* ]]; do
542 subdname=${directive/*%\(}
543 subdname=${subdname/\)*}
544 subdirective="$(_gcc-specs-directive_raw ${subdname})"
545 directive="${directive//\%(${subdname})/${subdirective}}"
546 done
547 echo "${directive}"
548 return 0
549 }
550
551 # Returns true if gcc sets relro
552 gcc-specs-relro() {
553 local directive
554 directive=$(gcc-specs-directive link_command)
555 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
556 }
557 # Returns true if gcc sets now
558 gcc-specs-now() {
559 local directive
560 directive=$(gcc-specs-directive link_command)
561 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
562 }
563 # Returns true if gcc builds PIEs
564 gcc-specs-pie() {
565 local directive
566 directive=$(gcc-specs-directive cc1)
567 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
568 }
569 # Returns true if gcc builds with the stack protector
570 gcc-specs-ssp() {
571 local directive
572 directive=$(gcc-specs-directive cc1)
573 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
574 }
575 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
576 gcc-specs-ssp-to-all() {
577 local directive
578 directive=$(gcc-specs-directive cc1)
579 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
580 }
581 # Returns true if gcc builds with fno-strict-overflow
582 gcc-specs-nostrict() {
583 local directive
584 directive=$(gcc-specs-directive cc1)
585 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
586 }
587
588
589 # @FUNCTION: gen_usr_ldscript
590 # @USAGE: [-a] <list of libs to create linker scripts for>
591 # @DESCRIPTION:
592 # This function generate linker scripts in /usr/lib for dynamic
593 # libs in /lib. This is to fix linking problems when you have
594 # the .so in /lib, and the .a in /usr/lib. What happens is that
595 # in some cases when linking dynamic, the .a in /usr/lib is used
596 # instead of the .so in /lib due to gcc/libtool tweaking ld's
597 # library search path. This causes many builds to fail.
598 # See bug #4411 for more info.
599 #
600 # Note that you should in general use the unversioned name of
601 # the library (libfoo.so), as ldconfig should usually update it
602 # correctly to point to the latest version of the library present.
603 gen_usr_ldscript() {
604 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
605 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
606
607 tc-is-static-only && return
608
609 # Just make sure it exists
610 dodir /usr/${libdir}
611
612 if [[ $1 == "-a" ]] ; then
613 auto=true
614 shift
615 dodir /${libdir}
616 fi
617
618 # OUTPUT_FORMAT gives hints to the linker as to what binary format
619 # is referenced ... makes multilib saner
620 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
621 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
622
623 for lib in "$@" ; do
624 local tlib
625 if ${auto} ; then
626 lib="lib${lib}${suffix}"
627 else
628 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
629 # This especially is for AIX where $(get_libname) can return ".a",
630 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
631 [[ -r ${ED}/${libdir}/${lib} ]] || continue
632 #TODO: better die here?
633 fi
634
635 case ${CTARGET:-${CHOST}} in
636 *-darwin*)
637 if ${auto} ; then
638 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
639 else
640 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
641 fi
642 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
643 tlib=${tlib##*/}
644
645 if ${auto} ; then
646 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
647 # some install_names are funky: they encode a version
648 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
649 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
650 fi
651 rm -f "${ED}"/${libdir}/${lib}
652 fi
653
654 # Mach-O files have an id, which is like a soname, it tells how
655 # another object linking against this lib should reference it.
656 # Since we moved the lib from usr/lib into lib this reference is
657 # wrong. Hence, we update it here. We don't configure with
658 # libdir=/lib because that messes up libtool files.
659 # Make sure we don't lose the specific version, so just modify the
660 # existing install_name
661 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
662 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
663 local nowrite=yes
664 fi
665 install_name_tool \
666 -id "${EPREFIX}"/${libdir}/${tlib} \
667 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
668 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
669 # Now as we don't use GNU binutils and our linker doesn't
670 # understand linker scripts, just create a symlink.
671 pushd "${ED}/usr/${libdir}" > /dev/null
672 ln -snf "../../${libdir}/${tlib}" "${lib}"
673 popd > /dev/null
674 ;;
675 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
676 if ${auto} ; then
677 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
678 # no way to retrieve soname on these platforms (?)
679 tlib=$(readlink "${ED}"/${libdir}/${lib})
680 tlib=${tlib##*/}
681 if [[ -z ${tlib} ]] ; then
682 # ok, apparently was not a symlink, don't remove it and
683 # just link to it
684 tlib=${lib}
685 else
686 rm -f "${ED}"/${libdir}/${lib}
687 fi
688 else
689 tlib=${lib}
690 fi
691
692 # we don't have GNU binutils on these platforms, so we symlink
693 # instead, which seems to work fine. Keep it relative, otherwise
694 # we break some QA checks in Portage
695 # on interix, the linker scripts would work fine in _most_
696 # situations. if a library links to such a linker script the
697 # absolute path to the correct library is inserted into the binary,
698 # which is wrong, since anybody linking _without_ libtool will miss
699 # some dependencies, since the stupid linker cannot find libraries
700 # hardcoded with absolute paths (as opposed to the loader, which
701 # seems to be able to do this).
702 # this has been seen while building shared-mime-info which needs
703 # libxml2, but links without libtool (and does not add libz to the
704 # command line by itself).
705 pushd "${ED}/usr/${libdir}" > /dev/null
706 ln -snf "../../${libdir}/${tlib}" "${lib}"
707 popd > /dev/null
708 ;;
709 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
710 if ${auto} ; then
711 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
712 [[ -z ${tlib} ]] && tlib=${lib}
713 tlib=${tlib##*/} # 'internal name' can have a path component
714 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
715 # some SONAMEs are funky: they encode a version before the .so
716 if [[ ${tlib} != ${lib}* ]] ; then
717 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
718 fi
719 [[ ${tlib} != ${lib} ]] &&
720 rm -f "${ED}"/${libdir}/${lib}
721 else
722 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
723 [[ -z ${tlib} ]] && tlib=${lib}
724 tlib=${tlib##*/} # 'internal name' can have a path component
725 fi
726 pushd "${ED}"/usr/${libdir} >/dev/null
727 ln -snf "../../${libdir}/${tlib}" "${lib}"
728 # need the internal name in usr/lib too, to be available at runtime
729 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
730 [[ ${tlib} != ${lib} ]] &&
731 ln -snf "../../${libdir}/${tlib}" "${tlib}"
732 popd >/dev/null
733 ;;
734 *)
735 if ${auto} ; then
736 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
737 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
738 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
739 # some SONAMEs are funky: they encode a version before the .so
740 if [[ ${tlib} != ${lib}* ]] ; then
741 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
742 fi
743 rm -f "${ED}"/${libdir}/${lib}
744 else
745 tlib=${lib}
746 fi
747 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
748 /* GNU ld script
749 Since Gentoo has critical dynamic libraries in /lib, and the static versions
750 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
751 run into linking problems. This "fake" dynamic lib is a linker script that
752 redirects the linker to the real lib. And yes, this works in the cross-
753 compiling scenario as the sysroot-ed linker will prepend the real path.
754
755 See bug http://bugs.gentoo.org/4411 for more info.
756 */
757 ${output_format}
758 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
759 END_LDSCRIPT
760 ;;
761 esac
762 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
763 done
764 }
765
766 fi

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