/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.9 Revision 1.111
1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2011 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 1.9 2004/11/17 22:13:07 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.111 2012/06/09 06:56:14 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
16if [[ ${___ECLASS_ONCE_TOOLCHAIN_FUNCS} != "recur -_+^+_- spank" ]] ; then
17___ECLASS_ONCE_TOOLCHAIN_FUNCS="recur -_+^+_- spank"
18
19inherit multilib
20
21DESCRIPTION="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}
46tc-getBUILD_PROG() { _tc-getPROG CBUILD "BUILD_$1 $1_FOR_BUILD HOST$1" "${@:2}"; }
47tc-getPROG() { _tc-getPROG CHOST "$@"; }
48
49# @FUNCTION: tc-getAR
50# @USAGE: [toolchain prefix]
51# @RETURN: name of the archiver
52tc-getAR() { tc-getPROG AR ar "$@"; }
53# @FUNCTION: tc-getAS
54# @USAGE: [toolchain prefix]
55# @RETURN: name of the assembler
56tc-getAS() { tc-getPROG AS as "$@"; }
57# @FUNCTION: tc-getCC
58# @USAGE: [toolchain prefix]
59# @RETURN: name of the C compiler
60tc-getCC() { tc-getPROG CC gcc "$@"; }
61# @FUNCTION: tc-getCPP
62# @USAGE: [toolchain prefix]
63# @RETURN: name of the C preprocessor
64tc-getCPP() { tc-getPROG CPP cpp "$@"; }
65# @FUNCTION: tc-getCXX
66# @USAGE: [toolchain prefix]
67# @RETURN: name of the C++ compiler
68tc-getCXX() { tc-getPROG CXX g++ "$@"; }
69# @FUNCTION: tc-getLD
70# @USAGE: [toolchain prefix]
71# @RETURN: name of the linker
72tc-getLD() { tc-getPROG LD ld "$@"; }
73# @FUNCTION: tc-getSTRIP
74# @USAGE: [toolchain prefix]
75# @RETURN: name of the strip program
76tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
77# @FUNCTION: tc-getNM
78# @USAGE: [toolchain prefix]
79# @RETURN: name of the symbol/object thingy
80tc-getNM() { tc-getPROG NM nm "$@"; }
81# @FUNCTION: tc-getRANLIB
82# @USAGE: [toolchain prefix]
83# @RETURN: name of the archiver indexer
84tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
85# @FUNCTION: tc-getOBJCOPY
86# @USAGE: [toolchain prefix]
87# @RETURN: name of the object copier
88tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
89# @FUNCTION: tc-getF77
90# @USAGE: [toolchain prefix]
91# @RETURN: name of the Fortran 77 compiler
92tc-getF77() { tc-getPROG F77 gfortran "$@"; }
93# @FUNCTION: tc-getFC
94# @USAGE: [toolchain prefix]
95# @RETURN: name of the Fortran 90 compiler
96tc-getFC() { tc-getPROG FC gfortran "$@"; }
97# @FUNCTION: tc-getGCJ
98# @USAGE: [toolchain prefix]
99# @RETURN: name of the java compiler
100tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
101# @FUNCTION: tc-getPKG_CONFIG
102# @USAGE: [toolchain prefix]
103# @RETURN: name of the pkg-config tool
104tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
105# @FUNCTION: tc-getRC
106# @USAGE: [toolchain prefix]
107# @RETURN: name of the Windows resource compiler
108tc-getRC() { tc-getPROG RC windres "$@"; }
109# @FUNCTION: tc-getDLLWRAP
110# @USAGE: [toolchain prefix]
111# @RETURN: name of the Windows dllwrap utility
112tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
113
114# @FUNCTION: tc-getBUILD_AR
115# @USAGE: [toolchain prefix]
116# @RETURN: name of the archiver for building binaries to run on the build machine
117tc-getBUILD_AR() { tc-getBUILD_PROG AR ar "$@"; }
118# @FUNCTION: tc-getBUILD_AS
119# @USAGE: [toolchain prefix]
120# @RETURN: name of the assembler for building binaries to run on the build machine
121tc-getBUILD_AS() { tc-getBUILD_PROG AS as "$@"; }
122# @FUNCTION: tc-getBUILD_CC
123# @USAGE: [toolchain prefix]
124# @RETURN: name of the C compiler for building binaries to run on the build machine
125tc-getBUILD_CC() { tc-getBUILD_PROG CC gcc "$@"; }
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
129tc-getBUILD_CPP() { tc-getBUILD_PROG CPP cpp "$@"; }
130# @FUNCTION: tc-getBUILD_CXX
131# @USAGE: [toolchain prefix]
132# @RETURN: name of the C++ compiler for building binaries to run on the build machine
133tc-getBUILD_CXX() { tc-getBUILD_PROG CXX g++ "$@"; }
134# @FUNCTION: tc-getBUILD_LD
135# @USAGE: [toolchain prefix]
136# @RETURN: name of the linker for building binaries to run on the build machine
137tc-getBUILD_LD() { tc-getBUILD_PROG LD ld "$@"; }
138# @FUNCTION: tc-getBUILD_STRIP
139# @USAGE: [toolchain prefix]
140# @RETURN: name of the strip program for building binaries to run on the build machine
141tc-getBUILD_STRIP() { tc-getBUILD_PROG STRIP strip "$@"; }
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
145tc-getBUILD_NM() { tc-getBUILD_PROG NM nm "$@"; }
146# @FUNCTION: tc-getBUILD_RANLIB
147# @USAGE: [toolchain prefix]
148# @RETURN: name of the archiver indexer for building binaries to run on the build machine
149tc-getBUILD_RANLIB() { tc-getBUILD_PROG RANLIB ranlib "$@"; }
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
153tc-getBUILD_OBJCOPY() { tc-getBUILD_PROG OBJCOPY objcopy "$@"; }
154# @FUNCTION: tc-getBUILD_PKG_CONFIG
155# @USAGE: [toolchain prefix]
156# @RETURN: name of the pkg-config tool for building binaries to run on the build machine
157tc-getBUILD_PKG_CONFIG() { tc-getBUILD_PROG PKG_CONFIG pkg-config "$@"; }
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.
163tc-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
173tc-is-cross-compiler() {
174 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
175}
176
177# @FUNCTION: tc-is-softfloat
178# @DESCRIPTION:
179# See if this toolchain is a softfloat based one.
180# @CODE
181# The possible return values:
182# - only: the target is always softfloat (never had fpu)
183# - yes: the target should support softfloat
184# - softfp: (arm specific) the target should use hardfloat insns, but softfloat calling convention
185# - no: the target doesn't support softfloat
186# @CODE
187# This allows us to react differently where packages accept
188# softfloat flags in the case where support is optional, but
189# rejects softfloat flags where the target always lacks an fpu.
190tc-is-softfloat() {
191 local CTARGET=${CTARGET:-${CHOST}}
192 case ${CTARGET} in
193 bfin*|h8300*)
194 echo "only" ;;
195 *)
196 if [[ ${CTARGET//_/-} == *-softfloat-* ]] ; then
197 echo "yes"
198 elif [[ ${CTARGET//_/-} == *-softfp-* ]] ; then
199 echo "softfp"
200 else
201 echo "no"
202 fi
203 ;;
204 esac
205}
206
207# @FUNCTION: tc-is-static-only
208# @DESCRIPTION:
209# Return shell true if the target does not support shared libs, shell false
210# otherwise.
211tc-is-static-only() {
212 local host=${CTARGET:-${CHOST}}
213
214 # *MiNT doesn't have shared libraries, only platform so far
215 return $([[ ${host} == *-mint* ]])
216}
217
218# @FUNCTION: tc-env_build
219# @USAGE: <command> [command args]
220# @INTERNAL
221# @DESCRIPTION:
222# Setup the compile environment to the build tools and then execute the
223# specified command. We use tc-getBUILD_XX here so that we work with
224# all of the semi-[non-]standard env vars like $BUILD_CC which often
225# the target build system does not check.
226tc-env_build() {
227 CFLAGS=${BUILD_CFLAGS:--O1 -pipe} \
228 CXXFLAGS=${BUILD_CXXFLAGS:--O1 -pipe} \
229 CPPFLAGS=${BUILD_CPPFLAGS} \
230 LDFLAGS=${BUILD_LDFLAGS} \
231 AR=$(tc-getBUILD_AR) \
232 AS=$(tc-getBUILD_AS) \
233 CC=$(tc-getBUILD_CC) \
234 CPP=$(tc-getBUILD_CPP) \
235 CXX=$(tc-getBUILD_CXX) \
236 LD=$(tc-getBUILD_LD) \
237 NM=$(tc-getBUILD_NM) \
238 PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
239 RANLIB=$(tc-getBUILD_RANLIB) \
240 "$@"
241}
242
243# @FUNCTION: econf_build
244# @USAGE: [econf flags]
245# @DESCRIPTION:
246# Sometimes we need to locally build up some tools to run on CBUILD because
247# the package has helper utils which are compiled+executed when compiling.
248# This won't work when cross-compiling as the CHOST is set to a target which
249# we cannot natively execute.
4# 250#
5# Author: Toolchain Ninjas <ninjas@gentoo.org> 251# For example, the python package will build up a local python binary using
252# a portable build system (configure+make), but then use that binary to run
253# local python scripts to build up other components of the overall python.
254# We cannot rely on the python binary in $PATH as that often times will be
255# a different version, or not even installed in the first place. Instead,
256# we compile the code in a different directory to run on CBUILD, and then
257# use that binary when compiling the main package to run on CHOST.
6# 258#
7# This eclass contains (or should) functions to get common info 259# For example, with newer EAPIs, you'd do something like:
8# about the toolchain (libc/compiler/binutils/etc...) 260# @CODE
261# src_configure() {
262# ECONF_SOURCE=${S}
263# if tc-is-cross-compiler ; then
264# mkdir "${WORKDIR}"/${CBUILD}
265# pushd "${WORKDIR}"/${CBUILD} >/dev/null
266# econf_build --disable-some-unused-stuff
267# popd >/dev/null
268# fi
269# ... normal build paths ...
270# }
271# src_compile() {
272# if tc-is-cross-compiler ; then
273# pushd "${WORKDIR}"/${CBUILD} >/dev/null
274# emake one-or-two-build-tools
275# ln/mv build-tools to normal build paths in ${S}/
276# popd >/dev/null
277# fi
278# ... normal build paths ...
279# }
280# @CODE
281econf_build() {
282 tc-env_build econf --build=${CBUILD:-${CHOST}} "$@"
283}
9 284
10inherit eutils 285# @FUNCTION: tc-has-openmp
286# @USAGE: [toolchain prefix]
287# @DESCRIPTION:
288# See if the toolchain supports OpenMP.
289tc-has-openmp() {
290 local base="${T}/test-tc-openmp"
291 cat <<-EOF > "${base}.c"
292 #include <omp.h>
293 int main() {
294 int nthreads, tid, ret = 0;
295 #pragma omp parallel private(nthreads, tid)
296 {
297 tid = omp_get_thread_num();
298 nthreads = omp_get_num_threads(); ret += tid + nthreads;
299 }
300 return ret;
301 }
302 EOF
303 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
304 local ret=$?
305 rm -f "${base}"*
306 return ${ret}
307}
11 308
12ECLASS=toolchain-funcs 309# @FUNCTION: tc-has-tls
13INHERITED="$INHERITED $ECLASS" 310# @USAGE: [-s|-c|-l] [toolchain prefix]
311# @DESCRIPTION:
312# See if the toolchain supports thread local storage (TLS). Use -s to test the
313# compiler, -c to also test the assembler, and -l to also test the C library
314# (the default).
315tc-has-tls() {
316 local base="${T}/test-tc-tls"
317 cat <<-EOF > "${base}.c"
318 int foo(int *i) {
319 static __thread int j = 0;
320 return *i ? j : *i;
321 }
322 EOF
323 local flags
324 case $1 in
325 -s) flags="-S";;
326 -c) flags="-c";;
327 -l) ;;
328 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
329 esac
330 : ${flags:=-fPIC -shared -Wl,-z,defs}
331 [[ $1 == -* ]] && shift
332 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
333 local ret=$?
334 rm -f "${base}"*
335 return ${ret}
336}
14 337
15DESCRIPTION="Based on the ${ECLASS} eclass"
16 338
17tc-getPROG() { 339# Parse information from CBUILD/CHOST/CTARGET rather than
340# use external variables from the profile.
341tc-ninja_magic_to_arch() {
342ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
343
344 local type=$1
345 local host=$2
346 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
347
348 case ${host} in
349 alpha*) echo alpha;;
350 arm*) echo arm;;
351 avr*) ninj avr32 avr;;
352 bfin*) ninj blackfin bfin;;
353 cris*) echo cris;;
354 hppa*) ninj parisc hppa;;
355 i?86*)
356 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
357 # trees have been unified into 'x86'.
358 # FreeBSD still uses i386
359 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
360 echo i386
361 else
362 echo x86
363 fi
364 ;;
365 ia64*) echo ia64;;
366 m68*) echo m68k;;
367 mips*) echo mips;;
368 nios2*) echo nios2;;
369 nios*) echo nios;;
370 powerpc*)
371 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
372 # have been unified into simply 'powerpc', but until 2.6.16,
373 # ppc32 is still using ARCH="ppc" as default
374 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
375 echo powerpc
376 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
377 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
378 echo powerpc
379 else
380 echo ppc
381 fi
382 elif [[ ${host} == powerpc64* ]] ; then
383 echo ppc64
384 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
385 ninj ppc64 ppc
386 else
387 echo ppc
388 fi
389 ;;
390 s390*) echo s390;;
391 sh64*) ninj sh64 sh;;
392 sh*) echo sh;;
393 sparc64*) ninj sparc64 sparc;;
394 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
395 && ninj sparc64 sparc \
396 || echo sparc
397 ;;
398 vax*) echo vax;;
399 x86_64*freebsd*) echo amd64;;
400 x86_64*)
401 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
402 # trees have been unified into 'x86'.
403 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
404 echo x86
405 else
406 ninj x86_64 amd64
407 fi
408 ;;
409
410 # since our usage of tc-arch is largely concerned with
411 # normalizing inputs for testing ${CTARGET}, let's filter
412 # other cross targets (mingw and such) into the unknown.
413 *) echo unknown;;
414 esac
415}
416# @FUNCTION: tc-arch-kernel
417# @USAGE: [toolchain prefix]
418# @RETURN: name of the kernel arch according to the compiler target
419tc-arch-kernel() {
420 tc-ninja_magic_to_arch kern "$@"
421}
422# @FUNCTION: tc-arch
423# @USAGE: [toolchain prefix]
424# @RETURN: name of the portage arch according to the compiler target
425tc-arch() {
426 tc-ninja_magic_to_arch portage "$@"
427}
428
429tc-endian() {
430 local host=$1
431 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
432 host=${host%%-*}
433
434 case ${host} in
435 alpha*) echo big;;
436 arm*b*) echo big;;
437 arm*) echo little;;
438 cris*) echo little;;
439 hppa*) echo big;;
440 i?86*) echo little;;
441 ia64*) echo little;;
442 m68*) echo big;;
443 mips*l*) echo little;;
444 mips*) echo big;;
445 powerpc*) echo big;;
446 s390*) echo big;;
447 sh*b*) echo big;;
448 sh*) echo little;;
449 sparc*) echo big;;
450 x86_64*) echo little;;
451 *) echo wtf;;
452 esac
453}
454
455# Internal func. The first argument is the version info to expand.
456# Query the preprocessor to improve compatibility across different
457# compilers rather than maintaining a --version flag matrix. #335943
458_gcc_fullversion() {
18 local var="$1" 459 local ver="$1"; shift
19 local prog="$2" 460 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
20 local search="" 461 eval echo "$ver"
462}
21 463
22 if [ -n "${!var}" ] ; then 464# @FUNCTION: gcc-fullversion
23 echo "${!var}" 465# @RETURN: compiler version (major.minor.micro: [3.4.6])
466gcc-fullversion() {
467 _gcc_fullversion '$1.$2.$3' "$@"
468}
469# @FUNCTION: gcc-version
470# @RETURN: compiler version (major.minor: [3.4].6)
471gcc-version() {
472 _gcc_fullversion '$1.$2' "$@"
473}
474# @FUNCTION: gcc-major-version
475# @RETURN: major compiler version (major: [3].4.6)
476gcc-major-version() {
477 _gcc_fullversion '$1' "$@"
478}
479# @FUNCTION: gcc-minor-version
480# @RETURN: minor compiler version (minor: 3.[4].6)
481gcc-minor-version() {
482 _gcc_fullversion '$2' "$@"
483}
484# @FUNCTION: gcc-micro-version
485# @RETURN: micro compiler version (micro: 3.4.[6])
486gcc-micro-version() {
487 _gcc_fullversion '$3' "$@"
488}
489
490# Returns the installation directory - internal toolchain
491# function for use by _gcc-specs-exists (for flag-o-matic).
492_gcc-install-dir() {
493 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
494 awk '$1=="install:" {print $2}')"
495}
496# Returns true if the indicated specs file exists - internal toolchain
497# function for use by flag-o-matic.
498_gcc-specs-exists() {
499 [[ -f $(_gcc-install-dir)/$1 ]]
500}
501
502# Returns requested gcc specs directive unprocessed - for used by
503# gcc-specs-directive()
504# Note; later specs normally overwrite earlier ones; however if a later
505# spec starts with '+' then it appends.
506# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
507# as "Reading <file>", in order. Strictly speaking, if there's a
508# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
509# the same token anything from 'gcc -dumpspecs' is overridden by
510# the contents of $(gcc_install_dir)/specs so the result is the
511# same either way.
512_gcc-specs-directive_raw() {
513 local cc=$(tc-getCC)
514 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
515 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
516'BEGIN { pspec=""; spec=""; outside=1 }
517$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
518 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
519 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
520 { spec=spec $0 }
521END { print spec }'
24 return 0 522 return 0
523}
524
525# Return the requested gcc specs directive, with all included
526# specs expanded.
527# Note, it does not check for inclusion loops, which cause it
528# to never finish - but such loops are invalid for gcc and we're
529# assuming gcc is operational.
530gcc-specs-directive() {
531 local directive subdname subdirective
532 directive="$(_gcc-specs-directive_raw $1)"
533 while [[ ${directive} == *%\(*\)* ]]; do
534 subdname=${directive/*%\(}
535 subdname=${subdname/\)*}
536 subdirective="$(_gcc-specs-directive_raw ${subdname})"
537 directive="${directive//\%(${subdname})/${subdirective}}"
538 done
539 echo "${directive}"
540 return 0
541}
542
543# Returns true if gcc sets relro
544gcc-specs-relro() {
545 local directive
546 directive=$(gcc-specs-directive link_command)
547 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
548}
549# Returns true if gcc sets now
550gcc-specs-now() {
551 local directive
552 directive=$(gcc-specs-directive link_command)
553 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
554}
555# Returns true if gcc builds PIEs
556gcc-specs-pie() {
557 local directive
558 directive=$(gcc-specs-directive cc1)
559 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
560}
561# Returns true if gcc builds with the stack protector
562gcc-specs-ssp() {
563 local directive
564 directive=$(gcc-specs-directive cc1)
565 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
566}
567# Returns true if gcc upgrades fstack-protector to fstack-protector-all
568gcc-specs-ssp-to-all() {
569 local directive
570 directive=$(gcc-specs-directive cc1)
571 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
572}
573# Returns true if gcc builds with fno-strict-overflow
574gcc-specs-nostrict() {
575 local directive
576 directive=$(gcc-specs-directive cc1)
577 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
578}
579
580
581# @FUNCTION: gen_usr_ldscript
582# @USAGE: [-a] <list of libs to create linker scripts for>
583# @DESCRIPTION:
584# This function generate linker scripts in /usr/lib for dynamic
585# libs in /lib. This is to fix linking problems when you have
586# the .so in /lib, and the .a in /usr/lib. What happens is that
587# in some cases when linking dynamic, the .a in /usr/lib is used
588# instead of the .so in /lib due to gcc/libtool tweaking ld's
589# library search path. This causes many builds to fail.
590# See bug #4411 for more info.
591#
592# Note that you should in general use the unversioned name of
593# the library (libfoo.so), as ldconfig should usually update it
594# correctly to point to the latest version of the library present.
595gen_usr_ldscript() {
596 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
597 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
598
599 tc-is-static-only && return
600
601 # Just make sure it exists
602 dodir /usr/${libdir}
603
604 if [[ $1 == "-a" ]] ; then
605 auto=true
606 shift
607 dodir /${libdir}
25 fi 608 fi
26 609
27 if [ -n "${CTARGET}" ] ; then 610 # OUTPUT_FORMAT gives hints to the linker as to what binary format
28 search="$(type -p "${CTARGET}-${prog}")" 611 # is referenced ... makes multilib saner
29 elif [ -n "${CHOST}" ] ; then 612 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
30 search="$(type -p "${CHOST}-${prog}")" 613 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
31 fi
32 614
33 if [ -n "${search}" ] ; then 615 for lib in "$@" ; do
34 prog="${search##*/}" 616 local tlib
35 fi 617 if ${auto} ; then
36 export ${var}="${prog}" 618 lib="lib${lib}${suffix}"
37 echo "${!var}"
38}
39
40# Returns the name of the archiver
41tc-getAR() { tc-getPROG AR ar; }
42# Returns the name of the assembler
43tc-getAS() { tc-getPROG AS as; }
44# Returns the name of the C compiler
45tc-getCC() { tc-getPROG CC gcc; }
46# Returns the name of the C++ compiler
47tc-getCXX() { tc-getPROG CXX g++; }
48# Returns the name of the linker
49tc-getLD() { tc-getPROG LD ld; }
50# Returns the name of the symbol/object thingy
51tc-getNM() { tc-getPROG NM nm; }
52# Returns the name of the archiver indexer
53tc-getRANLIB() { tc-getPROG RANLIB ranlib; }
54# Returns the name of the fortran compiler
55tc-getF77() { tc-getPROG F77 f77; }
56# Returns the name of the java compiler
57tc-getGCJ() { tc-getPROG GCJ gcj; }
58
59# Returns the name of the C compiler for build
60tc-getBUILD_CC() {
61 if [ -n "${CC_FOR_BUILD}" ] ; then
62 echo "${CC_FOR_BUILD}"
63 return 0
64 fi
65
66 local search=
67 if [ -n "${CTARGET}" ] ; then
68 search="$(type -p "${CTARGET}-gcc")"
69 elif [ -n "${CHOST}" ] ; then
70 search="$(type -p "${CHOST}-gcc")"
71 fi
72
73 if [ -n "${search}" ] ; then
74 echo "${search##*/}"
75 else 619 else
76 echo "gcc" 620 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
621 # This especially is for AIX where $(get_libname) can return ".a",
622 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
623 [[ -r ${ED}/${libdir}/${lib} ]] || continue
624 #TODO: better die here?
77 fi 625 fi
78}
79 626
627 case ${CTARGET:-${CHOST}} in
628 *-darwin*)
629 if ${auto} ; then
630 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
631 else
632 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
633 fi
634 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
635 tlib=${tlib##*/}
80 636
81# Returns the version as by `$CC -dumpversion` 637 if ${auto} ; then
82gcc-fullversion() { 638 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
83 echo "$($(tc-getCC) -dumpversion)" 639 # some install_names are funky: they encode a version
640 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
641 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
642 fi
643 rm -f "${ED}"/${libdir}/${lib}
644 fi
645
646 # Mach-O files have an id, which is like a soname, it tells how
647 # another object linking against this lib should reference it.
648 # Since we moved the lib from usr/lib into lib this reference is
649 # wrong. Hence, we update it here. We don't configure with
650 # libdir=/lib because that messes up libtool files.
651 # Make sure we don't lose the specific version, so just modify the
652 # existing install_name
653 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
654 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
655 local nowrite=yes
656 fi
657 install_name_tool \
658 -id "${EPREFIX}"/${libdir}/${tlib} \
659 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
660 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
661 # Now as we don't use GNU binutils and our linker doesn't
662 # understand linker scripts, just create a symlink.
663 pushd "${ED}/usr/${libdir}" > /dev/null
664 ln -snf "../../${libdir}/${tlib}" "${lib}"
665 popd > /dev/null
666 ;;
667 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
668 if ${auto} ; then
669 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
670 # no way to retrieve soname on these platforms (?)
671 tlib=$(readlink "${ED}"/${libdir}/${lib})
672 tlib=${tlib##*/}
673 if [[ -z ${tlib} ]] ; then
674 # ok, apparently was not a symlink, don't remove it and
675 # just link to it
676 tlib=${lib}
677 else
678 rm -f "${ED}"/${libdir}/${lib}
679 fi
680 else
681 tlib=${lib}
682 fi
683
684 # we don't have GNU binutils on these platforms, so we symlink
685 # instead, which seems to work fine. Keep it relative, otherwise
686 # we break some QA checks in Portage
687 # on interix, the linker scripts would work fine in _most_
688 # situations. if a library links to such a linker script the
689 # absolute path to the correct library is inserted into the binary,
690 # which is wrong, since anybody linking _without_ libtool will miss
691 # some dependencies, since the stupid linker cannot find libraries
692 # hardcoded with absolute paths (as opposed to the loader, which
693 # seems to be able to do this).
694 # this has been seen while building shared-mime-info which needs
695 # libxml2, but links without libtool (and does not add libz to the
696 # command line by itself).
697 pushd "${ED}/usr/${libdir}" > /dev/null
698 ln -snf "../../${libdir}/${tlib}" "${lib}"
699 popd > /dev/null
700 ;;
701 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
702 if ${auto} ; then
703 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
704 [[ -z ${tlib} ]] && tlib=${lib}
705 tlib=${tlib##*/} # 'internal name' can have a path component
706 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
707 # some SONAMEs are funky: they encode a version before the .so
708 if [[ ${tlib} != ${lib}* ]] ; then
709 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
710 fi
711 [[ ${tlib} != ${lib} ]] &&
712 rm -f "${ED}"/${libdir}/${lib}
713 else
714 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
715 [[ -z ${tlib} ]] && tlib=${lib}
716 tlib=${tlib##*/} # 'internal name' can have a path component
717 fi
718 pushd "${ED}"/usr/${libdir} >/dev/null
719 ln -snf "../../${libdir}/${tlib}" "${lib}"
720 # need the internal name in usr/lib too, to be available at runtime
721 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
722 [[ ${tlib} != ${lib} ]] &&
723 ln -snf "../../${libdir}/${tlib}" "${tlib}"
724 popd >/dev/null
725 ;;
726 *)
727 if ${auto} ; then
728 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
729 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
730 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
731 # some SONAMEs are funky: they encode a version before the .so
732 if [[ ${tlib} != ${lib}* ]] ; then
733 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
734 fi
735 rm -f "${ED}"/${libdir}/${lib}
736 else
737 tlib=${lib}
738 fi
739 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
740 /* GNU ld script
741 Since Gentoo has critical dynamic libraries in /lib, and the static versions
742 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
743 run into linking problems. This "fake" dynamic lib is a linker script that
744 redirects the linker to the real lib. And yes, this works in the cross-
745 compiling scenario as the sysroot-ed linker will prepend the real path.
746
747 See bug http://bugs.gentoo.org/4411 for more info.
748 */
749 ${output_format}
750 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
751 END_LDSCRIPT
752 ;;
753 esac
754 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
755 done
84} 756}
85# Returns the version, but only the <major>.<minor> 757
86gcc-version() { 758fi
87 echo "$(gcc-fullversion | cut -f1,2 -d.)"
88}
89# Returns the Major version
90gcc-major-version() {
91 echo "$(gcc-version | cut -f1 -d.)"
92}
93# Returns the Minor version
94gcc-minor-version() {
95 echo "$(gcc-version | cut -f2 -d.)"
96}
97# Returns the Micro version
98gcc-micro-version() {
99 echo "$(gcc-fullversion | cut -f3 -d.)"
100}

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