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Revision 1.7 Revision 1.129
1# Copyright 1999-2004 Gentoo Foundation 1n Copyright 1999-2014 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.7 2004/10/28 15:30:09 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.129 2014/10/15 22:30:56 blueness 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
16if [[ -z ${_TOOLCHAIN_FUNCS_ECLASS} ]]; then
17_TOOLCHAIN_FUNCS_ECLASS=1
18
19inherit 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}
44tc-getBUILD_PROG() { _tc-getPROG CBUILD "BUILD_$1 $1_FOR_BUILD HOST$1" "${@:2}"; }
45tc-getPROG() { _tc-getPROG CHOST "$@"; }
46
47# @FUNCTION: tc-getAR
48# @USAGE: [toolchain prefix]
49# @RETURN: name of the archiver
50tc-getAR() { tc-getPROG AR ar "$@"; }
51# @FUNCTION: tc-getAS
52# @USAGE: [toolchain prefix]
53# @RETURN: name of the assembler
54tc-getAS() { tc-getPROG AS as "$@"; }
55# @FUNCTION: tc-getCC
56# @USAGE: [toolchain prefix]
57# @RETURN: name of the C compiler
58tc-getCC() { tc-getPROG CC gcc "$@"; }
59# @FUNCTION: tc-getCPP
60# @USAGE: [toolchain prefix]
61# @RETURN: name of the C preprocessor
62tc-getCPP() { tc-getPROG CPP cpp "$@"; }
63# @FUNCTION: tc-getCXX
64# @USAGE: [toolchain prefix]
65# @RETURN: name of the C++ compiler
66tc-getCXX() { tc-getPROG CXX g++ "$@"; }
67# @FUNCTION: tc-getLD
68# @USAGE: [toolchain prefix]
69# @RETURN: name of the linker
70tc-getLD() { tc-getPROG LD ld "$@"; }
71# @FUNCTION: tc-getSTRIP
72# @USAGE: [toolchain prefix]
73# @RETURN: name of the strip program
74tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
75# @FUNCTION: tc-getNM
76# @USAGE: [toolchain prefix]
77# @RETURN: name of the symbol/object thingy
78tc-getNM() { tc-getPROG NM nm "$@"; }
79# @FUNCTION: tc-getRANLIB
80# @USAGE: [toolchain prefix]
81# @RETURN: name of the archiver indexer
82tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
83# @FUNCTION: tc-getOBJCOPY
84# @USAGE: [toolchain prefix]
85# @RETURN: name of the object copier
86tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
87# @FUNCTION: tc-getF77
88# @USAGE: [toolchain prefix]
89# @RETURN: name of the Fortran 77 compiler
90tc-getF77() { tc-getPROG F77 gfortran "$@"; }
91# @FUNCTION: tc-getFC
92# @USAGE: [toolchain prefix]
93# @RETURN: name of the Fortran 90 compiler
94tc-getFC() { tc-getPROG FC gfortran "$@"; }
95# @FUNCTION: tc-getGCJ
96# @USAGE: [toolchain prefix]
97# @RETURN: name of the java compiler
98tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
99# @FUNCTION: tc-getPKG_CONFIG
100# @USAGE: [toolchain prefix]
101# @RETURN: name of the pkg-config tool
102tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
103# @FUNCTION: tc-getRC
104# @USAGE: [toolchain prefix]
105# @RETURN: name of the Windows resource compiler
106tc-getRC() { tc-getPROG RC windres "$@"; }
107# @FUNCTION: tc-getDLLWRAP
108# @USAGE: [toolchain prefix]
109# @RETURN: name of the Windows dllwrap utility
110tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
111
112# @FUNCTION: tc-getBUILD_AR
113# @USAGE: [toolchain prefix]
114# @RETURN: name of the archiver for building binaries to run on the build machine
115tc-getBUILD_AR() { tc-getBUILD_PROG AR ar "$@"; }
116# @FUNCTION: tc-getBUILD_AS
117# @USAGE: [toolchain prefix]
118# @RETURN: name of the assembler for building binaries to run on the build machine
119tc-getBUILD_AS() { tc-getBUILD_PROG AS as "$@"; }
120# @FUNCTION: tc-getBUILD_CC
121# @USAGE: [toolchain prefix]
122# @RETURN: name of the C compiler for building binaries to run on the build machine
123tc-getBUILD_CC() { tc-getBUILD_PROG CC gcc "$@"; }
124# @FUNCTION: tc-getBUILD_CPP
125# @USAGE: [toolchain prefix]
126# @RETURN: name of the C preprocessor for building binaries to run on the build machine
127tc-getBUILD_CPP() { tc-getBUILD_PROG CPP cpp "$@"; }
128# @FUNCTION: tc-getBUILD_CXX
129# @USAGE: [toolchain prefix]
130# @RETURN: name of the C++ compiler for building binaries to run on the build machine
131tc-getBUILD_CXX() { tc-getBUILD_PROG CXX g++ "$@"; }
132# @FUNCTION: tc-getBUILD_LD
133# @USAGE: [toolchain prefix]
134# @RETURN: name of the linker for building binaries to run on the build machine
135tc-getBUILD_LD() { tc-getBUILD_PROG LD ld "$@"; }
136# @FUNCTION: tc-getBUILD_STRIP
137# @USAGE: [toolchain prefix]
138# @RETURN: name of the strip program for building binaries to run on the build machine
139tc-getBUILD_STRIP() { tc-getBUILD_PROG STRIP strip "$@"; }
140# @FUNCTION: tc-getBUILD_NM
141# @USAGE: [toolchain prefix]
142# @RETURN: name of the symbol/object thingy for building binaries to run on the build machine
143tc-getBUILD_NM() { tc-getBUILD_PROG NM nm "$@"; }
144# @FUNCTION: tc-getBUILD_RANLIB
145# @USAGE: [toolchain prefix]
146# @RETURN: name of the archiver indexer for building binaries to run on the build machine
147tc-getBUILD_RANLIB() { tc-getBUILD_PROG RANLIB ranlib "$@"; }
148# @FUNCTION: tc-getBUILD_OBJCOPY
149# @USAGE: [toolchain prefix]
150# @RETURN: name of the object copier for building binaries to run on the build machine
151tc-getBUILD_OBJCOPY() { tc-getBUILD_PROG OBJCOPY objcopy "$@"; }
152# @FUNCTION: tc-getBUILD_PKG_CONFIG
153# @USAGE: [toolchain prefix]
154# @RETURN: name of the pkg-config tool for building binaries to run on the build machine
155tc-getBUILD_PKG_CONFIG() { tc-getBUILD_PROG PKG_CONFIG pkg-config "$@"; }
156
157# @FUNCTION: tc-export
158# @USAGE: <list of toolchain variables>
159# @DESCRIPTION:
160# Quick way to export a bunch of compiler vars at once.
161tc-export() {
162 local var
163 for var in "$@" ; do
164 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
165 eval tc-get${var} > /dev/null
166 done
167}
168
169# @FUNCTION: tc-is-cross-compiler
170# @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
171tc-is-cross-compiler() {
172 [[ ${CBUILD:-${CHOST}} != ${CHOST} ]]
173}
174
175# @FUNCTION: tc-is-softfloat
176# @DESCRIPTION:
177# See if this toolchain is a softfloat based one.
178# @CODE
179# The possible return values:
180# - only: the target is always softfloat (never had fpu)
181# - yes: the target should support softfloat
182# - softfp: (arm specific) the target should use hardfloat insns, but softfloat calling convention
183# - no: the target doesn't support softfloat
184# @CODE
185# This allows us to react differently where packages accept
186# softfloat flags in the case where support is optional, but
187# rejects softfloat flags where the target always lacks an fpu.
188tc-is-softfloat() {
189 local CTARGET=${CTARGET:-${CHOST}}
190 case ${CTARGET} in
191 bfin*|h8300*)
192 echo "only" ;;
193 *)
194 if [[ ${CTARGET//_/-} == *-softfloat-* ]] ; then
195 echo "yes"
196 elif [[ ${CTARGET//_/-} == *-softfp-* ]] ; then
197 echo "softfp"
198 else
199 echo "no"
200 fi
201 ;;
202 esac
203}
204
205# @FUNCTION: tc-is-static-only
206# @DESCRIPTION:
207# Return shell true if the target does not support shared libs, shell false
208# otherwise.
209tc-is-static-only() {
210 local host=${CTARGET:-${CHOST}}
211
212 # *MiNT doesn't have shared libraries, only platform so far
213 [[ ${host} == *-mint* ]]
214}
215
216# @FUNCTION: tc-export_build_env
217# @USAGE: [compiler variables]
218# @DESCRIPTION:
219# Export common build related compiler settings.
220tc-export_build_env() {
221 tc-export "$@"
222 : ${BUILD_CFLAGS:=-O1 -pipe}
223 : ${BUILD_CXXFLAGS:=-O1 -pipe}
224 : ${BUILD_CPPFLAGS:=}
225 : ${BUILD_LDFLAGS:=}
226 export BUILD_{C,CXX,CPP,LD}FLAGS
227
228 # Some packages use XXX_FOR_BUILD.
229 local v
230 for v in BUILD_{C,CXX,CPP,LD}FLAGS ; do
231 export ${v#BUILD_}_FOR_BUILD="${!v}"
232 done
233}
234
235# @FUNCTION: tc-env_build
236# @USAGE: <command> [command args]
237# @INTERNAL
238# @DESCRIPTION:
239# Setup the compile environment to the build tools and then execute the
240# specified command. We use tc-getBUILD_XX here so that we work with
241# all of the semi-[non-]standard env vars like $BUILD_CC which often
242# the target build system does not check.
243tc-env_build() {
244 tc-export_build_env
245 CFLAGS=${BUILD_CFLAGS} \
246 CXXFLAGS=${BUILD_CXXFLAGS} \
247 CPPFLAGS=${BUILD_CPPFLAGS} \
248 LDFLAGS=${BUILD_LDFLAGS} \
249 AR=$(tc-getBUILD_AR) \
250 AS=$(tc-getBUILD_AS) \
251 CC=$(tc-getBUILD_CC) \
252 CPP=$(tc-getBUILD_CPP) \
253 CXX=$(tc-getBUILD_CXX) \
254 LD=$(tc-getBUILD_LD) \
255 NM=$(tc-getBUILD_NM) \
256 PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
257 RANLIB=$(tc-getBUILD_RANLIB) \
258 "$@"
259}
260
261# @FUNCTION: econf_build
262# @USAGE: [econf flags]
263# @DESCRIPTION:
264# Sometimes we need to locally build up some tools to run on CBUILD because
265# the package has helper utils which are compiled+executed when compiling.
266# This won't work when cross-compiling as the CHOST is set to a target which
267# we cannot natively execute.
4# 268#
5# Author: Toolchain Ninjas <ninjas@gentoo.org> 269# For example, the python package will build up a local python binary using
270# a portable build system (configure+make), but then use that binary to run
271# local python scripts to build up other components of the overall python.
272# We cannot rely on the python binary in $PATH as that often times will be
273# a different version, or not even installed in the first place. Instead,
274# we compile the code in a different directory to run on CBUILD, and then
275# use that binary when compiling the main package to run on CHOST.
6# 276#
7# This eclass contains (or should) functions to get common info 277# For example, with newer EAPIs, you'd do something like:
8# about the toolchain (libc/compiler/binutils/etc...) 278# @CODE
279# src_configure() {
280# ECONF_SOURCE=${S}
281# if tc-is-cross-compiler ; then
282# mkdir "${WORKDIR}"/${CBUILD}
283# pushd "${WORKDIR}"/${CBUILD} >/dev/null
284# econf_build --disable-some-unused-stuff
285# popd >/dev/null
286# fi
287# ... normal build paths ...
288# }
289# src_compile() {
290# if tc-is-cross-compiler ; then
291# pushd "${WORKDIR}"/${CBUILD} >/dev/null
292# emake one-or-two-build-tools
293# ln/mv build-tools to normal build paths in ${S}/
294# popd >/dev/null
295# fi
296# ... normal build paths ...
297# }
298# @CODE
299econf_build() {
300 tc-env_build econf --build=${CBUILD:-${CHOST}} "$@"
301}
9 302
10inherit eutils 303# @FUNCTION: tc-has-openmp
304# @USAGE: [toolchain prefix]
305# @DESCRIPTION:
306# See if the toolchain supports OpenMP.
307tc-has-openmp() {
308 local base="${T}/test-tc-openmp"
309 cat <<-EOF > "${base}.c"
310 #include <omp.h>
311 int main() {
312 int nthreads, tid, ret = 0;
313 #pragma omp parallel private(nthreads, tid)
314 {
315 tid = omp_get_thread_num();
316 nthreads = omp_get_num_threads(); ret += tid + nthreads;
317 }
318 return ret;
319 }
320 EOF
321 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
322 local ret=$?
323 rm -f "${base}"*
324 return ${ret}
325}
11 326
12ECLASS=toolchain-funcs 327# @FUNCTION: tc-has-tls
13INHERITED="$INHERITED $ECLASS" 328# @USAGE: [-s|-c|-l] [toolchain prefix]
329# @DESCRIPTION:
330# See if the toolchain supports thread local storage (TLS). Use -s to test the
331# compiler, -c to also test the assembler, and -l to also test the C library
332# (the default).
333tc-has-tls() {
334 local base="${T}/test-tc-tls"
335 cat <<-EOF > "${base}.c"
336 int foo(int *i) {
337 static __thread int j = 0;
338 return *i ? j : *i;
339 }
340 EOF
341 local flags
342 case $1 in
343 -s) flags="-S";;
344 -c) flags="-c";;
345 -l) ;;
346 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
347 esac
348 : ${flags:=-fPIC -shared -Wl,-z,defs}
349 [[ $1 == -* ]] && shift
350 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
351 local ret=$?
352 rm -f "${base}"*
353 return ${ret}
354}
14 355
15DESCRIPTION="Based on the ${ECLASS} eclass"
16 356
17tc-getPROG() { 357# Parse information from CBUILD/CHOST/CTARGET rather than
358# use external variables from the profile.
359tc-ninja_magic_to_arch() {
360ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
361
362 local type=$1
363 local host=$2
364 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
365
366 local KV=${KV:-${KV_FULL}}
367 [[ ${type} == "kern" ]] && [[ -z ${KV} ]] && \
368 ewarn "QA: Kernel version could not be determined, please inherit kernel-2 or linux-info"
369
370 case ${host} in
371 aarch64*) echo arm64;;
372 alpha*) echo alpha;;
373 arm*) echo arm;;
374 avr*) ninj avr32 avr;;
375 bfin*) ninj blackfin bfin;;
376 c6x) echo c6x;;
377 cris*) echo cris;;
378 frv) echo frv;;
379 hexagon) echo hexagon;;
380 hppa*) ninj parisc hppa;;
381 i?86*)
382 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
383 # trees have been unified into 'x86'.
384 # FreeBSD still uses i386
385 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
386 echo i386
387 else
388 echo x86
389 fi
390 ;;
391 ia64*) echo ia64;;
392 m68*) echo m68k;;
393 metag) echo metag;;
394 mips*) echo mips;;
395 nios2*) echo nios2;;
396 nios*) echo nios;;
397 or32) echo openrisc;;
398 powerpc*)
399 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
400 # have been unified into simply 'powerpc', but until 2.6.16,
401 # ppc32 is still using ARCH="ppc" as default
402 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
403 echo powerpc
404 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
405 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
406 echo powerpc
407 else
408 echo ppc
409 fi
410 elif [[ ${host} == powerpc64* ]] ; then
411 echo ppc64
412 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
413 ninj ppc64 ppc
414 else
415 echo ppc
416 fi
417 ;;
418 s390*) echo s390;;
419 score) echo score;;
420 sh64*) ninj sh64 sh;;
421 sh*) echo sh;;
422 sparc64*) ninj sparc64 sparc;;
423 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
424 && ninj sparc64 sparc \
425 || echo sparc
426 ;;
427 tile*) echo tile;;
428 vax*) echo vax;;
429 x86_64*freebsd*) echo amd64;;
430 x86_64*)
431 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
432 # trees have been unified into 'x86'.
433 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
434 echo x86
435 else
436 ninj x86_64 amd64
437 fi
438 ;;
439 xtensa*) echo xtensa;;
440
441 # since our usage of tc-arch is largely concerned with
442 # normalizing inputs for testing ${CTARGET}, let's filter
443 # other cross targets (mingw and such) into the unknown.
444 *) echo unknown;;
445 esac
446}
447# @FUNCTION: tc-arch-kernel
448# @USAGE: [toolchain prefix]
449# @RETURN: name of the kernel arch according to the compiler target
450tc-arch-kernel() {
451 tc-ninja_magic_to_arch kern "$@"
452}
453# @FUNCTION: tc-arch
454# @USAGE: [toolchain prefix]
455# @RETURN: name of the portage arch according to the compiler target
456tc-arch() {
457 tc-ninja_magic_to_arch portage "$@"
458}
459
460tc-endian() {
461 local host=$1
462 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
463 host=${host%%-*}
464
465 case ${host} in
466 aarch64*be) echo big;;
467 aarch64) echo little;;
468 alpha*) echo big;;
469 arm*b*) echo big;;
470 arm*) echo little;;
471 cris*) echo little;;
472 hppa*) echo big;;
473 i?86*) echo little;;
474 ia64*) echo little;;
475 m68*) echo big;;
476 mips*l*) echo little;;
477 mips*) echo big;;
478 powerpc*le) echo little;;
479 powerpc*) echo big;;
480 s390*) echo big;;
481 sh*b*) echo big;;
482 sh*) echo little;;
483 sparc*) echo big;;
484 x86_64*) echo little;;
485 *) echo wtf;;
486 esac
487}
488
489# Internal func. The first argument is the version info to expand.
490# Query the preprocessor to improve compatibility across different
491# compilers rather than maintaining a --version flag matrix. #335943
492_gcc_fullversion() {
18 local var="$1" 493 local ver="$1"; shift
19 local prog="$2" 494 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
20 local search="" 495 eval echo "$ver"
496}
21 497
22 if [ -n "${!var}" ] ; then 498# @FUNCTION: gcc-fullversion
23 echo "${!var}" 499# @RETURN: compiler version (major.minor.micro: [3.4.6])
500gcc-fullversion() {
501 _gcc_fullversion '$1.$2.$3' "$@"
502}
503# @FUNCTION: gcc-version
504# @RETURN: compiler version (major.minor: [3.4].6)
505gcc-version() {
506 _gcc_fullversion '$1.$2' "$@"
507}
508# @FUNCTION: gcc-major-version
509# @RETURN: major compiler version (major: [3].4.6)
510gcc-major-version() {
511 _gcc_fullversion '$1' "$@"
512}
513# @FUNCTION: gcc-minor-version
514# @RETURN: minor compiler version (minor: 3.[4].6)
515gcc-minor-version() {
516 _gcc_fullversion '$2' "$@"
517}
518# @FUNCTION: gcc-micro-version
519# @RETURN: micro compiler version (micro: 3.4.[6])
520gcc-micro-version() {
521 _gcc_fullversion '$3' "$@"
522}
523
524# Returns the installation directory - internal toolchain
525# function for use by _gcc-specs-exists (for flag-o-matic).
526_gcc-install-dir() {
527 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
528 awk '$1=="install:" {print $2}')"
529}
530# Returns true if the indicated specs file exists - internal toolchain
531# function for use by flag-o-matic.
532_gcc-specs-exists() {
533 [[ -f $(_gcc-install-dir)/$1 ]]
534}
535
536# Returns requested gcc specs directive unprocessed - for used by
537# gcc-specs-directive()
538# Note; later specs normally overwrite earlier ones; however if a later
539# spec starts with '+' then it appends.
540# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
541# as "Reading <file>", in order. Strictly speaking, if there's a
542# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
543# the same token anything from 'gcc -dumpspecs' is overridden by
544# the contents of $(gcc_install_dir)/specs so the result is the
545# same either way.
546_gcc-specs-directive_raw() {
547 local cc=$(tc-getCC)
548 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
549 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
550'BEGIN { pspec=""; spec=""; outside=1 }
551$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
552 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
553 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
554 { spec=spec $0 }
555END { print spec }'
24 return 0 556 return 0
557}
558
559# Return the requested gcc specs directive, with all included
560# specs expanded.
561# Note, it does not check for inclusion loops, which cause it
562# to never finish - but such loops are invalid for gcc and we're
563# assuming gcc is operational.
564gcc-specs-directive() {
565 local directive subdname subdirective
566 directive="$(_gcc-specs-directive_raw $1)"
567 while [[ ${directive} == *%\(*\)* ]]; do
568 subdname=${directive/*%\(}
569 subdname=${subdname/\)*}
570 subdirective="$(_gcc-specs-directive_raw ${subdname})"
571 directive="${directive//\%(${subdname})/${subdirective}}"
572 done
573 echo "${directive}"
574 return 0
575}
576
577# Returns true if gcc sets relro
578gcc-specs-relro() {
579 local directive
580 directive=$(gcc-specs-directive link_command)
581 [[ "${directive/\{!norelro:}" != "${directive}" ]]
582}
583# Returns true if gcc sets now
584gcc-specs-now() {
585 local directive
586 directive=$(gcc-specs-directive link_command)
587 [[ "${directive/\{!nonow:}" != "${directive}" ]]
588}
589# Returns true if gcc builds PIEs
590gcc-specs-pie() {
591 local directive
592 directive=$(gcc-specs-directive cc1)
593 [[ "${directive/\{!nopie:}" != "${directive}" ]]
594}
595# Returns true if gcc builds with the stack protector
596gcc-specs-ssp() {
597 local directive
598 directive=$(gcc-specs-directive cc1)
599 [[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]]
600}
601# Returns true if gcc upgrades fstack-protector to fstack-protector-all
602gcc-specs-ssp-to-all() {
603 local directive
604 directive=$(gcc-specs-directive cc1)
605 [[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]]
606}
607# Returns true if gcc builds with fno-strict-overflow
608gcc-specs-nostrict() {
609 local directive
610 directive=$(gcc-specs-directive cc1)
611 [[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]]
612}
613# Returns true if gcc builds with fstack-check
614gcc-specs-stack-check() {
615 local directive
616 directive=$(gcc-specs-directive cc1)
617 [[ "${directive/\{!fno-stack-check:}" != "${directive}" ]]
618}
619
620
621# @FUNCTION: gen_usr_ldscript
622# @USAGE: [-a] <list of libs to create linker scripts for>
623# @DESCRIPTION:
624# This function generate linker scripts in /usr/lib for dynamic
625# libs in /lib. This is to fix linking problems when you have
626# the .so in /lib, and the .a in /usr/lib. What happens is that
627# in some cases when linking dynamic, the .a in /usr/lib is used
628# instead of the .so in /lib due to gcc/libtool tweaking ld's
629# library search path. This causes many builds to fail.
630# See bug #4411 for more info.
631#
632# Note that you should in general use the unversioned name of
633# the library (libfoo.so), as ldconfig should usually update it
634# correctly to point to the latest version of the library present.
635gen_usr_ldscript() {
636 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
637 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
638
639 tc-is-static-only && return
640
641 # Eventually we'd like to get rid of this func completely #417451
642 case ${CTARGET:-${CHOST}} in
643 *-darwin*) ;;
644 *linux*|*-freebsd*|*-openbsd*|*-netbsd*)
645 use prefix && return 0 ;;
646 *) return 0 ;;
647 esac
648
649 # Just make sure it exists
650 dodir /usr/${libdir}
651
652 if [[ $1 == "-a" ]] ; then
653 auto=true
654 shift
655 dodir /${libdir}
25 fi 656 fi
26 657
27 # how should we handle the host/target/build ? 658 # OUTPUT_FORMAT gives hints to the linker as to what binary format
28 if [ -n "${CTARGET}" ] ; then 659 # is referenced ... makes multilib saner
29 search="$(type -p "${CTARGET}-${prog}")" 660 local flags=( ${CFLAGS} ${LDFLAGS} -Wl,--verbose )
661 if $(tc-getLD) --version | grep -q 'GNU gold' ; then
662 # If they're using gold, manually invoke the old bfd. #487696
663 local d="${T}/bfd-linker"
664 mkdir -p "${d}"
665 ln -sf $(which ${CHOST}-ld.bfd) "${d}"/ld
666 flags+=( -B"${d}" )
667 fi
668 output_format=$($(tc-getCC) "${flags[@]}" 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
669 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
670
671 for lib in "$@" ; do
672 local tlib
673 if ${auto} ; then
674 lib="lib${lib}${suffix}"
30 else 675 else
31 if [ -n "${CHOST}" ] ; then 676 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
32 search="$(type -p "${CHOST}-${prog}")" 677 # This especially is for AIX where $(get_libname) can return ".a",
678 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
679 [[ -r ${ED}/${libdir}/${lib} ]] || continue
680 #TODO: better die here?
33 fi 681 fi
34 fi
35 682
36 if [ -n "${search}" ] ; then 683 case ${CTARGET:-${CHOST}} in
37 prog="${search##*/}" 684 *-darwin*)
38 fi 685 if ${auto} ; then
39 export ${var}="${prog}" 686 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
40 echo "${!var}" 687 else
41} 688 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
42
43# Returns the name of the archiver
44tc-getAR() { tc-getPROG AR ar; }
45# Returns the name of the assembler
46tc-getAS() { tc-getPROG AS as; }
47# Returns the name of the C compiler
48tc-getCC() { tc-getPROG CC gcc; }
49# Returns the name of the C++ compiler
50tc-getCXX() { tc-getPROG CXX g++; }
51# Returns the name of the linker
52tc-getLD() { tc-getPROG LD ld; }
53# Returns the name of the symbol/object thingy
54tc-getNM() { tc-getPROG NM nm; }
55# Returns the name of the archiver indexer
56tc-getRANLIB() { tc-getPROG RANLIB ranlib; }
57# Returns the name of the fortran compiler
58tc-getF77() { tc-getPROG F77 f77; }
59
60# Returns the name of the C compiler for build
61tc-getBUILD_CC() {
62 if [ -n "${CC_FOR_BUILD}" ] ; then
63 echo "${CC_FOR_BUILD}"
64 return 0
65 fi
66
67 if [ -n "${CBUILD}" ] ; then
68 local cc="$(type -p "${CBUILD}-gcc")"
69 if [ -n "${cc}" ] ; then
70 echo "${cc}"
71 fi 689 fi
690 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
691 tlib=${tlib##*/}
692
693 if ${auto} ; then
694 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
695 # some install_names are funky: they encode a version
696 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
697 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
698 fi
699 rm -f "${ED}"/${libdir}/${lib}
700 fi
701
702 # Mach-O files have an id, which is like a soname, it tells how
703 # another object linking against this lib should reference it.
704 # Since we moved the lib from usr/lib into lib this reference is
705 # wrong. Hence, we update it here. We don't configure with
706 # libdir=/lib because that messes up libtool files.
707 # Make sure we don't lose the specific version, so just modify the
708 # existing install_name
709 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
710 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
711 local nowrite=yes
712 fi
713 install_name_tool \
714 -id "${EPREFIX}"/${libdir}/${tlib} \
715 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
716 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
717 # Now as we don't use GNU binutils and our linker doesn't
718 # understand linker scripts, just create a symlink.
719 pushd "${ED}/usr/${libdir}" > /dev/null
720 ln -snf "../../${libdir}/${tlib}" "${lib}"
721 popd > /dev/null
722 ;;
723 *)
724 if ${auto} ; then
725 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
726 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
727 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
728 # some SONAMEs are funky: they encode a version before the .so
729 if [[ ${tlib} != ${lib}* ]] ; then
730 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
731 fi
732 rm -f "${ED}"/${libdir}/${lib}
733 else
734 tlib=${lib}
735 fi
736 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
737 /* GNU ld script
738 Since Gentoo has critical dynamic libraries in /lib, and the static versions
739 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
740 run into linking problems. This "fake" dynamic lib is a linker script that
741 redirects the linker to the real lib. And yes, this works in the cross-
742 compiling scenario as the sysroot-ed linker will prepend the real path.
743
744 See bug http://bugs.gentoo.org/4411 for more info.
745 */
746 ${output_format}
747 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
748 END_LDSCRIPT
749 ;;
750 esac
751 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
752 done
753}
754
72 fi 755fi
73
74 echo "gcc"
75}
76
77
78# Returns the version as by `$CC -dumpversion`
79gcc-fullversion() {
80 echo "$($(tc-getCC) -dumpversion)"
81}
82# Returns the version, but only the <major>.<minor>
83gcc-version() {
84 echo "$(gcc-fullversion | cut -f1,2 -d.)"
85}
86# Returns the Major version
87gcc-major-version() {
88 echo "$(gcc-version | cut -f1 -d.)"
89}
90# Returns the Minor version
91gcc-minor-version() {
92 echo "$(gcc-version | cut -f2 -d.)"
93}
94# Returns the Micro version
95gcc-micro-version() {
96 echo "$(gcc-fullversion | cut -f3 -d.)"
97}

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