/[gentoo-x86]/eclass/toolchain-funcs.eclass
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1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2012 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 1.17 2004/12/30 21:27:27 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.118 2012/09/27 19:34:28 axs Exp $
4# 4
5# @ECLASS: toolchain-funcs.eclass
6# @MAINTAINER:
5# Author: Toolchain Ninjas <ninjas@gentoo.org> 7# Toolchain Ninjas <toolchain@gentoo.org>
6# 8# @BLURB: functions to query common info about the toolchain
7# This eclass contains (or should) functions to get common info 9# @DESCRIPTION:
8# about the toolchain (libc/compiler/binutils/etc...) 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.
9 15
16if [[ ${___ECLASS_ONCE_TOOLCHAIN_FUNCS} != "recur -_+^+_- spank" ]] ; then
17___ECLASS_ONCE_TOOLCHAIN_FUNCS="recur -_+^+_- spank"
18
10inherit eutils 19inherit multilib
11 20
12ECLASS=toolchain-funcs 21# tc-getPROG <VAR [search vars]> <default> [tuple]
13INHERITED="$INHERITED $ECLASS"
14
15DESCRIPTION="Based on the ${ECLASS} eclass"
16
17tc-getPROG() { 22_tc-getPROG() {
18 local var=$1 23 local tuple=$1
24 local v var vars=$2
19 local prog=$2 25 local prog=$3
20 26
27 var=${vars%% *}
28 for v in ${vars} ; do
21 if [[ -n ${!var} ]] ; then 29 if [[ -n ${!v} ]] ; then
30 export ${var}="${!v}"
22 echo "${!var}" 31 echo "${!v}"
23 return 0 32 return 0
24 fi 33 fi
34 done
25 35
26 if [[ -n ${CHOST} ]] ; then 36 local search=
27 local search=$(type -p "${CHOST}-${prog}") 37 [[ -n $4 ]] && search=$(type -p "$4-${prog}")
28 prog=${search##*/} 38 [[ -z ${search} && -n ${!tuple} ]] && search=$(type -p "${!tuple}-${prog}")
29 fi 39 [[ -n ${search} ]] && prog=${search##*/}
30 40
31 export ${var}=${prog} 41 export ${var}=${prog}
32 echo "${!var}" 42 echo "${!var}"
33} 43}
44tc-getBUILD_PROG() { _tc-getPROG CBUILD "BUILD_$1 $1_FOR_BUILD HOST$1" "${@:2}"; }
45tc-getPROG() { _tc-getPROG CHOST "$@"; }
34 46
35# Returns the name of the archiver 47# @FUNCTION: tc-getAR
48# @USAGE: [toolchain prefix]
49# @RETURN: name of the archiver
36tc-getAR() { tc-getPROG AR ar; } 50tc-getAR() { tc-getPROG AR ar "$@"; }
37# Returns the name of the assembler 51# @FUNCTION: tc-getAS
52# @USAGE: [toolchain prefix]
53# @RETURN: name of the assembler
38tc-getAS() { tc-getPROG AS as; } 54tc-getAS() { tc-getPROG AS as "$@"; }
55# @FUNCTION: tc-getCC
56# @USAGE: [toolchain prefix]
39# Returns the name of the C compiler 57# @RETURN: name of the C compiler
40tc-getCC() { tc-getPROG CC gcc; } 58tc-getCC() { tc-getPROG CC gcc "$@"; }
59# @FUNCTION: tc-getCPP
60# @USAGE: [toolchain prefix]
61# @RETURN: name of the C preprocessor
62tc-getCPP() { tc-getPROG CPP cpp "$@"; }
63# @FUNCTION: tc-getCXX
64# @USAGE: [toolchain prefix]
41# Returns the name of the C++ compiler 65# @RETURN: name of the C++ compiler
42tc-getCXX() { tc-getPROG CXX g++; } 66tc-getCXX() { tc-getPROG CXX g++ "$@"; }
43# Returns the name of the linker 67# @FUNCTION: tc-getLD
68# @USAGE: [toolchain prefix]
69# @RETURN: name of the linker
44tc-getLD() { tc-getPROG LD ld; } 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]
45# Returns the name of the symbol/object thingy 77# @RETURN: name of the symbol/object thingy
46tc-getNM() { tc-getPROG NM nm; } 78tc-getNM() { tc-getPROG NM nm "$@"; }
79# @FUNCTION: tc-getRANLIB
80# @USAGE: [toolchain prefix]
47# Returns the name of the archiver indexer 81# @RETURN: name of the archiver indexer
48tc-getRANLIB() { tc-getPROG RANLIB ranlib; } 82tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
49# Returns the name of the fortran compiler 83# @FUNCTION: tc-getOBJCOPY
84# @USAGE: [toolchain prefix]
85# @RETURN: name of the object copier
86tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
87# @FUNCTION: tc-getF77
88# @USAGE: [toolchain prefix]
89# @RETURN: name of the Fortran 77 compiler
50tc-getF77() { tc-getPROG F77 f77; } 90tc-getF77() { tc-getPROG F77 gfortran "$@"; }
91# @FUNCTION: tc-getFC
92# @USAGE: [toolchain prefix]
93# @RETURN: name of the Fortran 90 compiler
94tc-getFC() { tc-getPROG FC gfortran "$@"; }
95# @FUNCTION: tc-getGCJ
96# @USAGE: [toolchain prefix]
51# Returns the name of the java compiler 97# @RETURN: name of the java compiler
52tc-getGCJ() { tc-getPROG GCJ gcj; } 98tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
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 "$@"; }
53 111
54# Returns the name of the C compiler for build 112# @FUNCTION: tc-getBUILD_AR
55tc-getBUILD_CC() { 113# @USAGE: [toolchain prefix]
56 if [[ -n ${CC_FOR_BUILD} ]] ; then 114# @RETURN: name of the archiver for building binaries to run on the build machine
57 export BUILD_CC=${CC_FOR_BUILD} 115tc-getBUILD_AR() { tc-getBUILD_PROG AR ar "$@"; }
58 echo "${CC_FOR_BUILD}" 116# @FUNCTION: tc-getBUILD_AS
59 return 0 117# @USAGE: [toolchain prefix]
60 fi 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 "$@"; }
152# @FUNCTION: tc-getBUILD_PKG_CONFIG
153# @USAGE: [toolchain prefix]
154# @RETURN: name of the pkg-config tool for building binaries to run on the build machine
155tc-getBUILD_PKG_CONFIG() { tc-getBUILD_PROG PKG_CONFIG pkg-config "$@"; }
61 156
62 local search= 157# @FUNCTION: tc-export
63 if [[ -n ${CBUILD} ]] ; then 158# @USAGE: <list of toolchain variables>
64 search=$(type -p "${CBUILD}-gcc") 159# @DESCRIPTION:
65 search=${search##*/}
66 else
67 search=gcc
68 fi
69
70 export BUILD_CC=${search}
71 echo "${search}"
72}
73
74# Quick way to export a bunch of vars at once 160# Quick way to export a bunch of compiler vars at once.
75tc-export() { 161tc-export() {
76 local var 162 local var
77 for var in "$@" ; do 163 for var in "$@" ; do
164 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
78 eval tc-get${var} 165 eval tc-get${var} > /dev/null
79 done 166 done
80} 167}
81 168
82# A simple way to see if we're using a cross-compiler ... 169# @FUNCTION: tc-is-cross-compiler
170# @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
83tc-is-cross-compiler() { 171tc-is-cross-compiler() {
84 if [[ -n ${CBUILD} ]] ; then
85 return $([[ ${CBUILD} != ${CHOST} ]]) 172 return $([[ ${CBUILD:-${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 return $([[ ${host} == *-mint* ]])
214}
215
216# @FUNCTION: tc-export_build_env
217# @USAGE: [compiler variables]
218# @DESCRIPTION:
219# Export common build related compiler settings.
220tc-export_build_env() {
221 tc-export "$@"
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
229# @FUNCTION: tc-env_build
230# @USAGE: <command> [command args]
231# @INTERNAL
232# @DESCRIPTION:
233# Setup the compile environment to the build tools and then execute the
234# specified command. We use tc-getBUILD_XX here so that we work with
235# all of the semi-[non-]standard env vars like $BUILD_CC which often
236# the target build system does not check.
237tc-env_build() {
238 tc-export_build_env
239 CFLAGS=${BUILD_CFLAGS} \
240 CXXFLAGS=${BUILD_CXXFLAGS} \
241 CPPFLAGS=${BUILD_CPPFLAGS} \
242 LDFLAGS=${BUILD_LDFLAGS} \
243 AR=$(tc-getBUILD_AR) \
244 AS=$(tc-getBUILD_AS) \
245 CC=$(tc-getBUILD_CC) \
246 CPP=$(tc-getBUILD_CPP) \
247 CXX=$(tc-getBUILD_CXX) \
248 LD=$(tc-getBUILD_LD) \
249 NM=$(tc-getBUILD_NM) \
250 PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
251 RANLIB=$(tc-getBUILD_RANLIB) \
252 "$@"
253}
254
255# @FUNCTION: econf_build
256# @USAGE: [econf flags]
257# @DESCRIPTION:
258# Sometimes we need to locally build up some tools to run on CBUILD because
259# the package has helper utils which are compiled+executed when compiling.
260# This won't work when cross-compiling as the CHOST is set to a target which
261# we cannot natively execute.
262#
263# For example, the python package will build up a local python binary using
264# a portable build system (configure+make), but then use that binary to run
265# local python scripts to build up other components of the overall python.
266# We cannot rely on the python binary in $PATH as that often times will be
267# a different version, or not even installed in the first place. Instead,
268# we compile the code in a different directory to run on CBUILD, and then
269# use that binary when compiling the main package to run on CHOST.
270#
271# For example, with newer EAPIs, you'd do something like:
272# @CODE
273# src_configure() {
274# ECONF_SOURCE=${S}
275# if tc-is-cross-compiler ; then
276# mkdir "${WORKDIR}"/${CBUILD}
277# pushd "${WORKDIR}"/${CBUILD} >/dev/null
278# econf_build --disable-some-unused-stuff
279# popd >/dev/null
280# fi
281# ... normal build paths ...
282# }
283# src_compile() {
284# if tc-is-cross-compiler ; then
285# pushd "${WORKDIR}"/${CBUILD} >/dev/null
286# emake one-or-two-build-tools
287# ln/mv build-tools to normal build paths in ${S}/
288# popd >/dev/null
289# fi
290# ... normal build paths ...
291# }
292# @CODE
293econf_build() {
294 tc-env_build econf --build=${CBUILD:-${CHOST}} "$@"
295}
296
297# @FUNCTION: tc-has-openmp
298# @USAGE: [toolchain prefix]
299# @DESCRIPTION:
300# See if the toolchain supports OpenMP.
301tc-has-openmp() {
302 local base="${T}/test-tc-openmp"
303 cat <<-EOF > "${base}.c"
304 #include <omp.h>
305 int main() {
306 int nthreads, tid, ret = 0;
307 #pragma omp parallel private(nthreads, tid)
308 {
309 tid = omp_get_thread_num();
310 nthreads = omp_get_num_threads(); ret += tid + nthreads;
311 }
312 return ret;
313 }
314 EOF
315 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
316 local ret=$?
317 rm -f "${base}"*
318 return ${ret}
319}
320
321# @FUNCTION: tc-has-tls
322# @USAGE: [-s|-c|-l] [toolchain prefix]
323# @DESCRIPTION:
324# See if the toolchain supports thread local storage (TLS). Use -s to test the
325# compiler, -c to also test the assembler, and -l to also test the C library
326# (the default).
327tc-has-tls() {
328 local base="${T}/test-tc-tls"
329 cat <<-EOF > "${base}.c"
330 int foo(int *i) {
331 static __thread int j = 0;
332 return *i ? j : *i;
333 }
334 EOF
335 local flags
336 case $1 in
337 -s) flags="-S";;
338 -c) flags="-c";;
339 -l) ;;
340 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
341 esac
342 : ${flags:=-fPIC -shared -Wl,-z,defs}
343 [[ $1 == -* ]] && shift
344 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
345 local ret=$?
346 rm -f "${base}"*
347 return ${ret}
348}
349
350
351# Parse information from CBUILD/CHOST/CTARGET rather than
352# use external variables from the profile.
353tc-ninja_magic_to_arch() {
354ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
355
356 local type=$1
357 local host=$2
358 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
359
360 local KV=${KV:-${KV_FULL}}
361 [[ -z ${KV} ]] && die "toolchain-funcs.eclass: Kernel version could not be determined, please inherit kernel-2 or linux-info"
362
363 case ${host} in
364 aarch64*) ninj aarch64 arm;;
365 alpha*) echo alpha;;
366 arm*) echo arm;;
367 avr*) ninj avr32 avr;;
368 bfin*) ninj blackfin bfin;;
369 cris*) echo cris;;
370 hppa*) ninj parisc hppa;;
371 i?86*)
372 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
373 # trees have been unified into 'x86'.
374 # FreeBSD still uses i386
375 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
376 echo i386
377 else
378 echo x86
379 fi
380 ;;
381 ia64*) echo ia64;;
382 m68*) echo m68k;;
383 mips*) echo mips;;
384 nios2*) echo nios2;;
385 nios*) echo nios;;
386 powerpc*)
387 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
388 # have been unified into simply 'powerpc', but until 2.6.16,
389 # ppc32 is still using ARCH="ppc" as default
390 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
391 echo powerpc
392 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
393 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
394 echo powerpc
395 else
396 echo ppc
397 fi
398 elif [[ ${host} == powerpc64* ]] ; then
399 echo ppc64
400 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
401 ninj ppc64 ppc
402 else
403 echo ppc
404 fi
405 ;;
406 s390*) echo s390;;
407 sh64*) ninj sh64 sh;;
408 sh*) echo sh;;
409 sparc64*) ninj sparc64 sparc;;
410 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
411 && ninj sparc64 sparc \
412 || echo sparc
413 ;;
414 vax*) echo vax;;
415 x86_64*freebsd*) echo amd64;;
416 x86_64*)
417 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
418 # trees have been unified into 'x86'.
419 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
420 echo x86
421 else
422 ninj x86_64 amd64
423 fi
424 ;;
425
426 # since our usage of tc-arch is largely concerned with
427 # normalizing inputs for testing ${CTARGET}, let's filter
428 # other cross targets (mingw and such) into the unknown.
429 *) echo unknown;;
430 esac
431}
432# @FUNCTION: tc-arch-kernel
433# @USAGE: [toolchain prefix]
434# @RETURN: name of the kernel arch according to the compiler target
435tc-arch-kernel() {
436 tc-ninja_magic_to_arch kern "$@"
437}
438# @FUNCTION: tc-arch
439# @USAGE: [toolchain prefix]
440# @RETURN: name of the portage arch according to the compiler target
441tc-arch() {
442 tc-ninja_magic_to_arch portage "$@"
443}
444
445tc-endian() {
446 local host=$1
447 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
448 host=${host%%-*}
449
450 case ${host} in
451 aarch64*be) echo big;;
452 aarch64) echo little;;
453 alpha*) echo big;;
454 arm*b*) echo big;;
455 arm*) echo little;;
456 cris*) echo little;;
457 hppa*) echo big;;
458 i?86*) echo little;;
459 ia64*) echo little;;
460 m68*) echo big;;
461 mips*l*) echo little;;
462 mips*) echo big;;
463 powerpc*) echo big;;
464 s390*) echo big;;
465 sh*b*) echo big;;
466 sh*) echo little;;
467 sparc*) echo big;;
468 x86_64*) echo little;;
469 *) echo wtf;;
470 esac
471}
472
473# Internal func. The first argument is the version info to expand.
474# Query the preprocessor to improve compatibility across different
475# compilers rather than maintaining a --version flag matrix. #335943
476_gcc_fullversion() {
477 local ver="$1"; shift
478 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
479 eval echo "$ver"
480}
481
482# @FUNCTION: gcc-fullversion
483# @RETURN: compiler version (major.minor.micro: [3.4.6])
484gcc-fullversion() {
485 _gcc_fullversion '$1.$2.$3' "$@"
486}
487# @FUNCTION: gcc-version
488# @RETURN: compiler version (major.minor: [3.4].6)
489gcc-version() {
490 _gcc_fullversion '$1.$2' "$@"
491}
492# @FUNCTION: gcc-major-version
493# @RETURN: major compiler version (major: [3].4.6)
494gcc-major-version() {
495 _gcc_fullversion '$1' "$@"
496}
497# @FUNCTION: gcc-minor-version
498# @RETURN: minor compiler version (minor: 3.[4].6)
499gcc-minor-version() {
500 _gcc_fullversion '$2' "$@"
501}
502# @FUNCTION: gcc-micro-version
503# @RETURN: micro compiler version (micro: 3.4.[6])
504gcc-micro-version() {
505 _gcc_fullversion '$3' "$@"
506}
507
508# Returns the installation directory - internal toolchain
509# function for use by _gcc-specs-exists (for flag-o-matic).
510_gcc-install-dir() {
511 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
512 awk '$1=="install:" {print $2}')"
513}
514# Returns true if the indicated specs file exists - internal toolchain
515# function for use by flag-o-matic.
516_gcc-specs-exists() {
517 [[ -f $(_gcc-install-dir)/$1 ]]
518}
519
520# Returns requested gcc specs directive unprocessed - for used by
521# gcc-specs-directive()
522# Note; later specs normally overwrite earlier ones; however if a later
523# spec starts with '+' then it appends.
524# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
525# as "Reading <file>", in order. Strictly speaking, if there's a
526# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
527# the same token anything from 'gcc -dumpspecs' is overridden by
528# the contents of $(gcc_install_dir)/specs so the result is the
529# same either way.
530_gcc-specs-directive_raw() {
531 local cc=$(tc-getCC)
532 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
533 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
534'BEGIN { pspec=""; spec=""; outside=1 }
535$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
536 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
537 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
538 { spec=spec $0 }
539END { print spec }'
540 return 0
541}
542
543# Return the requested gcc specs directive, with all included
544# specs expanded.
545# Note, it does not check for inclusion loops, which cause it
546# to never finish - but such loops are invalid for gcc and we're
547# assuming gcc is operational.
548gcc-specs-directive() {
549 local directive subdname subdirective
550 directive="$(_gcc-specs-directive_raw $1)"
551 while [[ ${directive} == *%\(*\)* ]]; do
552 subdname=${directive/*%\(}
553 subdname=${subdname/\)*}
554 subdirective="$(_gcc-specs-directive_raw ${subdname})"
555 directive="${directive//\%(${subdname})/${subdirective}}"
556 done
557 echo "${directive}"
558 return 0
559}
560
561# Returns true if gcc sets relro
562gcc-specs-relro() {
563 local directive
564 directive=$(gcc-specs-directive link_command)
565 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
566}
567# Returns true if gcc sets now
568gcc-specs-now() {
569 local directive
570 directive=$(gcc-specs-directive link_command)
571 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
572}
573# Returns true if gcc builds PIEs
574gcc-specs-pie() {
575 local directive
576 directive=$(gcc-specs-directive cc1)
577 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
578}
579# Returns true if gcc builds with the stack protector
580gcc-specs-ssp() {
581 local directive
582 directive=$(gcc-specs-directive cc1)
583 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
584}
585# Returns true if gcc upgrades fstack-protector to fstack-protector-all
586gcc-specs-ssp-to-all() {
587 local directive
588 directive=$(gcc-specs-directive cc1)
589 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
590}
591# Returns true if gcc builds with fno-strict-overflow
592gcc-specs-nostrict() {
593 local directive
594 directive=$(gcc-specs-directive cc1)
595 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
596}
597
598
599# @FUNCTION: gen_usr_ldscript
600# @USAGE: [-a] <list of libs to create linker scripts for>
601# @DESCRIPTION:
602# This function generate linker scripts in /usr/lib for dynamic
603# libs in /lib. This is to fix linking problems when you have
604# the .so in /lib, and the .a in /usr/lib. What happens is that
605# in some cases when linking dynamic, the .a in /usr/lib is used
606# instead of the .so in /lib due to gcc/libtool tweaking ld's
607# library search path. This causes many builds to fail.
608# See bug #4411 for more info.
609#
610# Note that you should in general use the unversioned name of
611# the library (libfoo.so), as ldconfig should usually update it
612# correctly to point to the latest version of the library present.
613gen_usr_ldscript() {
614 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
615 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
616
617 tc-is-static-only && return
618
619 # Eventually we'd like to get rid of this func completely #417451
620 case ${CTARGET:-${CHOST}} in
621 *-darwin*) ;;
622 *linux*|*-freebsd*|*-openbsd*|*-netbsd*)
623 use prefix && return 0 ;;
624 *) return 0 ;;
625 esac
626
627 # Just make sure it exists
628 dodir /usr/${libdir}
629
630 if [[ $1 == "-a" ]] ; then
631 auto=true
632 shift
633 dodir /${libdir}
86 fi 634 fi
87 return 1
88}
89 635
636 # OUTPUT_FORMAT gives hints to the linker as to what binary format
637 # is referenced ... makes multilib saner
638 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
639 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
90 640
91# Returns the version as by `$CC -dumpversion` 641 for lib in "$@" ; do
92gcc-fullversion() { 642 local tlib
93 echo "$($(tc-getCC) -dumpversion)" 643 if ${auto} ; then
644 lib="lib${lib}${suffix}"
645 else
646 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
647 # This especially is for AIX where $(get_libname) can return ".a",
648 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
649 [[ -r ${ED}/${libdir}/${lib} ]] || continue
650 #TODO: better die here?
651 fi
652
653 case ${CTARGET:-${CHOST}} in
654 *-darwin*)
655 if ${auto} ; then
656 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
657 else
658 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
659 fi
660 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
661 tlib=${tlib##*/}
662
663 if ${auto} ; then
664 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
665 # some install_names are funky: they encode a version
666 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
667 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
668 fi
669 rm -f "${ED}"/${libdir}/${lib}
670 fi
671
672 # Mach-O files have an id, which is like a soname, it tells how
673 # another object linking against this lib should reference it.
674 # Since we moved the lib from usr/lib into lib this reference is
675 # wrong. Hence, we update it here. We don't configure with
676 # libdir=/lib because that messes up libtool files.
677 # Make sure we don't lose the specific version, so just modify the
678 # existing install_name
679 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
680 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
681 local nowrite=yes
682 fi
683 install_name_tool \
684 -id "${EPREFIX}"/${libdir}/${tlib} \
685 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
686 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
687 # Now as we don't use GNU binutils and our linker doesn't
688 # understand linker scripts, just create a symlink.
689 pushd "${ED}/usr/${libdir}" > /dev/null
690 ln -snf "../../${libdir}/${tlib}" "${lib}"
691 popd > /dev/null
692 ;;
693 *)
694 if ${auto} ; then
695 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
696 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
697 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
698 # some SONAMEs are funky: they encode a version before the .so
699 if [[ ${tlib} != ${lib}* ]] ; then
700 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
701 fi
702 rm -f "${ED}"/${libdir}/${lib}
703 else
704 tlib=${lib}
705 fi
706 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
707 /* GNU ld script
708 Since Gentoo has critical dynamic libraries in /lib, and the static versions
709 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
710 run into linking problems. This "fake" dynamic lib is a linker script that
711 redirects the linker to the real lib. And yes, this works in the cross-
712 compiling scenario as the sysroot-ed linker will prepend the real path.
713
714 See bug http://bugs.gentoo.org/4411 for more info.
715 */
716 ${output_format}
717 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
718 END_LDSCRIPT
719 ;;
720 esac
721 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
722 done
94} 723}
95# Returns the version, but only the <major>.<minor> 724
96gcc-version() { 725fi
97 echo "$(gcc-fullversion | cut -f1,2 -d.)"
98}
99# Returns the Major version
100gcc-major-version() {
101 echo "$(gcc-version | cut -f1 -d.)"
102}
103# Returns the Minor version
104gcc-minor-version() {
105 echo "$(gcc-version | cut -f2 -d.)"
106}
107# Returns the Micro version
108gcc-micro-version() {
109 echo "$(gcc-fullversion | cut -f3 -d.)"
110}

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