/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.113 - (show annotations) (download)
Sat Jul 21 16:11:01 2012 UTC (2 years, 5 months ago) by vapier
Branch: MAIN
Changes since 1.112: +9 -61 lines
stop creating linker scripts for non darwin/linux systems #417451

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 1.112 2012/06/14 03:38:51 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}} != ${CHOST} ]])
175 }
176
177 # @FUNCTION: tc-is-softfloat
178 # @DESCRIPTION:
179 # See if this toolchain is a softfloat based one.
180 # @CODE
181 # The possible return values:
182 # - only: the target is always softfloat (never had fpu)
183 # - yes: the target should support softfloat
184 # - softfp: (arm specific) the target should use hardfloat insns, but softfloat calling convention
185 # - no: the target doesn't support softfloat
186 # @CODE
187 # This allows us to react differently where packages accept
188 # softfloat flags in the case where support is optional, but
189 # rejects softfloat flags where the target always lacks an fpu.
190 tc-is-softfloat() {
191 local CTARGET=${CTARGET:-${CHOST}}
192 case ${CTARGET} in
193 bfin*|h8300*)
194 echo "only" ;;
195 *)
196 if [[ ${CTARGET//_/-} == *-softfloat-* ]] ; then
197 echo "yes"
198 elif [[ ${CTARGET//_/-} == *-softfp-* ]] ; then
199 echo "softfp"
200 else
201 echo "no"
202 fi
203 ;;
204 esac
205 }
206
207 # @FUNCTION: tc-is-static-only
208 # @DESCRIPTION:
209 # Return shell true if the target does not support shared libs, shell false
210 # otherwise.
211 tc-is-static-only() {
212 local host=${CTARGET:-${CHOST}}
213
214 # *MiNT doesn't have shared libraries, only platform so far
215 return $([[ ${host} == *-mint* ]])
216 }
217
218 # @FUNCTION: tc-export_build_env
219 # @USAGE: [compiler variables]
220 # @DESCRIPTION:
221 # Export common build related compiler settings.
222 tc-export_build_env() {
223 tc-export "$@"
224 : ${BUILD_CFLAGS:=-O1 -pipe}
225 : ${BUILD_CXXFLAGS:=-O1 -pipe}
226 : ${BUILD_CPPFLAGS:=}
227 : ${BUILD_LDFLAGS:=}
228 export BUILD_{C,CXX,CPP,LD}FLAGS
229 }
230
231 # @FUNCTION: tc-env_build
232 # @USAGE: <command> [command args]
233 # @INTERNAL
234 # @DESCRIPTION:
235 # Setup the compile environment to the build tools and then execute the
236 # specified command. We use tc-getBUILD_XX here so that we work with
237 # all of the semi-[non-]standard env vars like $BUILD_CC which often
238 # the target build system does not check.
239 tc-env_build() {
240 tc-export_build_env
241 CFLAGS=${BUILD_CFLAGS} \
242 CXXFLAGS=${BUILD_CXXFLAGS} \
243 CPPFLAGS=${BUILD_CPPFLAGS} \
244 LDFLAGS=${BUILD_LDFLAGS} \
245 AR=$(tc-getBUILD_AR) \
246 AS=$(tc-getBUILD_AS) \
247 CC=$(tc-getBUILD_CC) \
248 CPP=$(tc-getBUILD_CPP) \
249 CXX=$(tc-getBUILD_CXX) \
250 LD=$(tc-getBUILD_LD) \
251 NM=$(tc-getBUILD_NM) \
252 PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
253 RANLIB=$(tc-getBUILD_RANLIB) \
254 "$@"
255 }
256
257 # @FUNCTION: econf_build
258 # @USAGE: [econf flags]
259 # @DESCRIPTION:
260 # Sometimes we need to locally build up some tools to run on CBUILD because
261 # the package has helper utils which are compiled+executed when compiling.
262 # This won't work when cross-compiling as the CHOST is set to a target which
263 # we cannot natively execute.
264 #
265 # For example, the python package will build up a local python binary using
266 # a portable build system (configure+make), but then use that binary to run
267 # local python scripts to build up other components of the overall python.
268 # We cannot rely on the python binary in $PATH as that often times will be
269 # a different version, or not even installed in the first place. Instead,
270 # we compile the code in a different directory to run on CBUILD, and then
271 # use that binary when compiling the main package to run on CHOST.
272 #
273 # For example, with newer EAPIs, you'd do something like:
274 # @CODE
275 # src_configure() {
276 # ECONF_SOURCE=${S}
277 # if tc-is-cross-compiler ; then
278 # mkdir "${WORKDIR}"/${CBUILD}
279 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
280 # econf_build --disable-some-unused-stuff
281 # popd >/dev/null
282 # fi
283 # ... normal build paths ...
284 # }
285 # src_compile() {
286 # if tc-is-cross-compiler ; then
287 # pushd "${WORKDIR}"/${CBUILD} >/dev/null
288 # emake one-or-two-build-tools
289 # ln/mv build-tools to normal build paths in ${S}/
290 # popd >/dev/null
291 # fi
292 # ... normal build paths ...
293 # }
294 # @CODE
295 econf_build() {
296 tc-env_build econf --build=${CBUILD:-${CHOST}} "$@"
297 }
298
299 # @FUNCTION: tc-has-openmp
300 # @USAGE: [toolchain prefix]
301 # @DESCRIPTION:
302 # See if the toolchain supports OpenMP.
303 tc-has-openmp() {
304 local base="${T}/test-tc-openmp"
305 cat <<-EOF > "${base}.c"
306 #include <omp.h>
307 int main() {
308 int nthreads, tid, ret = 0;
309 #pragma omp parallel private(nthreads, tid)
310 {
311 tid = omp_get_thread_num();
312 nthreads = omp_get_num_threads(); ret += tid + nthreads;
313 }
314 return ret;
315 }
316 EOF
317 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
318 local ret=$?
319 rm -f "${base}"*
320 return ${ret}
321 }
322
323 # @FUNCTION: tc-has-tls
324 # @USAGE: [-s|-c|-l] [toolchain prefix]
325 # @DESCRIPTION:
326 # See if the toolchain supports thread local storage (TLS). Use -s to test the
327 # compiler, -c to also test the assembler, and -l to also test the C library
328 # (the default).
329 tc-has-tls() {
330 local base="${T}/test-tc-tls"
331 cat <<-EOF > "${base}.c"
332 int foo(int *i) {
333 static __thread int j = 0;
334 return *i ? j : *i;
335 }
336 EOF
337 local flags
338 case $1 in
339 -s) flags="-S";;
340 -c) flags="-c";;
341 -l) ;;
342 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
343 esac
344 : ${flags:=-fPIC -shared -Wl,-z,defs}
345 [[ $1 == -* ]] && shift
346 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
347 local ret=$?
348 rm -f "${base}"*
349 return ${ret}
350 }
351
352
353 # Parse information from CBUILD/CHOST/CTARGET rather than
354 # use external variables from the profile.
355 tc-ninja_magic_to_arch() {
356 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
357
358 local type=$1
359 local host=$2
360 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
361
362 case ${host} in
363 alpha*) echo alpha;;
364 arm*) echo arm;;
365 avr*) ninj avr32 avr;;
366 bfin*) ninj blackfin bfin;;
367 cris*) echo cris;;
368 hppa*) ninj parisc hppa;;
369 i?86*)
370 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
371 # trees have been unified into 'x86'.
372 # FreeBSD still uses i386
373 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
374 echo i386
375 else
376 echo x86
377 fi
378 ;;
379 ia64*) echo ia64;;
380 m68*) echo m68k;;
381 mips*) echo mips;;
382 nios2*) echo nios2;;
383 nios*) echo nios;;
384 powerpc*)
385 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
386 # have been unified into simply 'powerpc', but until 2.6.16,
387 # ppc32 is still using ARCH="ppc" as default
388 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
389 echo powerpc
390 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
391 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
392 echo powerpc
393 else
394 echo ppc
395 fi
396 elif [[ ${host} == powerpc64* ]] ; then
397 echo ppc64
398 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
399 ninj ppc64 ppc
400 else
401 echo ppc
402 fi
403 ;;
404 s390*) echo s390;;
405 sh64*) ninj sh64 sh;;
406 sh*) echo sh;;
407 sparc64*) ninj sparc64 sparc;;
408 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
409 && ninj sparc64 sparc \
410 || echo sparc
411 ;;
412 vax*) echo vax;;
413 x86_64*freebsd*) echo amd64;;
414 x86_64*)
415 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
416 # trees have been unified into 'x86'.
417 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
418 echo x86
419 else
420 ninj x86_64 amd64
421 fi
422 ;;
423
424 # since our usage of tc-arch is largely concerned with
425 # normalizing inputs for testing ${CTARGET}, let's filter
426 # other cross targets (mingw and such) into the unknown.
427 *) echo unknown;;
428 esac
429 }
430 # @FUNCTION: tc-arch-kernel
431 # @USAGE: [toolchain prefix]
432 # @RETURN: name of the kernel arch according to the compiler target
433 tc-arch-kernel() {
434 tc-ninja_magic_to_arch kern "$@"
435 }
436 # @FUNCTION: tc-arch
437 # @USAGE: [toolchain prefix]
438 # @RETURN: name of the portage arch according to the compiler target
439 tc-arch() {
440 tc-ninja_magic_to_arch portage "$@"
441 }
442
443 tc-endian() {
444 local host=$1
445 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
446 host=${host%%-*}
447
448 case ${host} in
449 alpha*) echo big;;
450 arm*b*) echo big;;
451 arm*) echo little;;
452 cris*) echo little;;
453 hppa*) echo big;;
454 i?86*) echo little;;
455 ia64*) echo little;;
456 m68*) echo big;;
457 mips*l*) echo little;;
458 mips*) echo big;;
459 powerpc*) echo big;;
460 s390*) echo big;;
461 sh*b*) echo big;;
462 sh*) echo little;;
463 sparc*) echo big;;
464 x86_64*) echo little;;
465 *) echo wtf;;
466 esac
467 }
468
469 # Internal func. The first argument is the version info to expand.
470 # Query the preprocessor to improve compatibility across different
471 # compilers rather than maintaining a --version flag matrix. #335943
472 _gcc_fullversion() {
473 local ver="$1"; shift
474 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
475 eval echo "$ver"
476 }
477
478 # @FUNCTION: gcc-fullversion
479 # @RETURN: compiler version (major.minor.micro: [3.4.6])
480 gcc-fullversion() {
481 _gcc_fullversion '$1.$2.$3' "$@"
482 }
483 # @FUNCTION: gcc-version
484 # @RETURN: compiler version (major.minor: [3.4].6)
485 gcc-version() {
486 _gcc_fullversion '$1.$2' "$@"
487 }
488 # @FUNCTION: gcc-major-version
489 # @RETURN: major compiler version (major: [3].4.6)
490 gcc-major-version() {
491 _gcc_fullversion '$1' "$@"
492 }
493 # @FUNCTION: gcc-minor-version
494 # @RETURN: minor compiler version (minor: 3.[4].6)
495 gcc-minor-version() {
496 _gcc_fullversion '$2' "$@"
497 }
498 # @FUNCTION: gcc-micro-version
499 # @RETURN: micro compiler version (micro: 3.4.[6])
500 gcc-micro-version() {
501 _gcc_fullversion '$3' "$@"
502 }
503
504 # Returns the installation directory - internal toolchain
505 # function for use by _gcc-specs-exists (for flag-o-matic).
506 _gcc-install-dir() {
507 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
508 awk '$1=="install:" {print $2}')"
509 }
510 # Returns true if the indicated specs file exists - internal toolchain
511 # function for use by flag-o-matic.
512 _gcc-specs-exists() {
513 [[ -f $(_gcc-install-dir)/$1 ]]
514 }
515
516 # Returns requested gcc specs directive unprocessed - for used by
517 # gcc-specs-directive()
518 # Note; later specs normally overwrite earlier ones; however if a later
519 # spec starts with '+' then it appends.
520 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
521 # as "Reading <file>", in order. Strictly speaking, if there's a
522 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
523 # the same token anything from 'gcc -dumpspecs' is overridden by
524 # the contents of $(gcc_install_dir)/specs so the result is the
525 # same either way.
526 _gcc-specs-directive_raw() {
527 local cc=$(tc-getCC)
528 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
529 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
530 'BEGIN { pspec=""; spec=""; outside=1 }
531 $1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
532 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
533 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
534 { spec=spec $0 }
535 END { print spec }'
536 return 0
537 }
538
539 # Return the requested gcc specs directive, with all included
540 # specs expanded.
541 # Note, it does not check for inclusion loops, which cause it
542 # to never finish - but such loops are invalid for gcc and we're
543 # assuming gcc is operational.
544 gcc-specs-directive() {
545 local directive subdname subdirective
546 directive="$(_gcc-specs-directive_raw $1)"
547 while [[ ${directive} == *%\(*\)* ]]; do
548 subdname=${directive/*%\(}
549 subdname=${subdname/\)*}
550 subdirective="$(_gcc-specs-directive_raw ${subdname})"
551 directive="${directive//\%(${subdname})/${subdirective}}"
552 done
553 echo "${directive}"
554 return 0
555 }
556
557 # Returns true if gcc sets relro
558 gcc-specs-relro() {
559 local directive
560 directive=$(gcc-specs-directive link_command)
561 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
562 }
563 # Returns true if gcc sets now
564 gcc-specs-now() {
565 local directive
566 directive=$(gcc-specs-directive link_command)
567 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
568 }
569 # Returns true if gcc builds PIEs
570 gcc-specs-pie() {
571 local directive
572 directive=$(gcc-specs-directive cc1)
573 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
574 }
575 # Returns true if gcc builds with the stack protector
576 gcc-specs-ssp() {
577 local directive
578 directive=$(gcc-specs-directive cc1)
579 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
580 }
581 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
582 gcc-specs-ssp-to-all() {
583 local directive
584 directive=$(gcc-specs-directive cc1)
585 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
586 }
587 # Returns true if gcc builds with fno-strict-overflow
588 gcc-specs-nostrict() {
589 local directive
590 directive=$(gcc-specs-directive cc1)
591 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
592 }
593
594
595 # @FUNCTION: gen_usr_ldscript
596 # @USAGE: [-a] <list of libs to create linker scripts for>
597 # @DESCRIPTION:
598 # This function generate linker scripts in /usr/lib for dynamic
599 # libs in /lib. This is to fix linking problems when you have
600 # the .so in /lib, and the .a in /usr/lib. What happens is that
601 # in some cases when linking dynamic, the .a in /usr/lib is used
602 # instead of the .so in /lib due to gcc/libtool tweaking ld's
603 # library search path. This causes many builds to fail.
604 # See bug #4411 for more info.
605 #
606 # Note that you should in general use the unversioned name of
607 # the library (libfoo.so), as ldconfig should usually update it
608 # correctly to point to the latest version of the library present.
609 gen_usr_ldscript() {
610 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
611 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
612
613 tc-is-static-only && return
614
615 # Eventually we'd like to get rid of this func completely #417451
616 case ${CTARGET:-${CHOST}} in
617 *-darwin*) ;;
618 *linux*) use prefix && return 0 ;;
619 *) return 0 ;;
620 esac
621
622 # Just make sure it exists
623 dodir /usr/${libdir}
624
625 if [[ $1 == "-a" ]] ; then
626 auto=true
627 shift
628 dodir /${libdir}
629 fi
630
631 # OUTPUT_FORMAT gives hints to the linker as to what binary format
632 # is referenced ... makes multilib saner
633 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
634 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
635
636 for lib in "$@" ; do
637 local tlib
638 if ${auto} ; then
639 lib="lib${lib}${suffix}"
640 else
641 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
642 # This especially is for AIX where $(get_libname) can return ".a",
643 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
644 [[ -r ${ED}/${libdir}/${lib} ]] || continue
645 #TODO: better die here?
646 fi
647
648 case ${CTARGET:-${CHOST}} in
649 *-darwin*)
650 if ${auto} ; then
651 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
652 else
653 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
654 fi
655 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
656 tlib=${tlib##*/}
657
658 if ${auto} ; then
659 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
660 # some install_names are funky: they encode a version
661 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
662 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
663 fi
664 rm -f "${ED}"/${libdir}/${lib}
665 fi
666
667 # Mach-O files have an id, which is like a soname, it tells how
668 # another object linking against this lib should reference it.
669 # Since we moved the lib from usr/lib into lib this reference is
670 # wrong. Hence, we update it here. We don't configure with
671 # libdir=/lib because that messes up libtool files.
672 # Make sure we don't lose the specific version, so just modify the
673 # existing install_name
674 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
675 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
676 local nowrite=yes
677 fi
678 install_name_tool \
679 -id "${EPREFIX}"/${libdir}/${tlib} \
680 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
681 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
682 # Now as we don't use GNU binutils and our linker doesn't
683 # understand linker scripts, just create a symlink.
684 pushd "${ED}/usr/${libdir}" > /dev/null
685 ln -snf "../../${libdir}/${tlib}" "${lib}"
686 popd > /dev/null
687 ;;
688 *linux*)
689 if ${auto} ; then
690 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
691 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
692 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
693 # some SONAMEs are funky: they encode a version before the .so
694 if [[ ${tlib} != ${lib}* ]] ; then
695 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
696 fi
697 rm -f "${ED}"/${libdir}/${lib}
698 else
699 tlib=${lib}
700 fi
701 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
702 /* GNU ld script
703 Since Gentoo has critical dynamic libraries in /lib, and the static versions
704 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
705 run into linking problems. This "fake" dynamic lib is a linker script that
706 redirects the linker to the real lib. And yes, this works in the cross-
707 compiling scenario as the sysroot-ed linker will prepend the real path.
708
709 See bug http://bugs.gentoo.org/4411 for more info.
710 */
711 ${output_format}
712 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
713 END_LDSCRIPT
714 ;;
715 esac
716 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
717 done
718 }
719
720 fi

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