/[gentoo-x86]/eclass/toolchain-funcs.eclass
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1# Copyright 1999-2005 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 1.43 2005/09/15 00:13:10 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.110 2012/05/10 03:31:22 vapier 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.
15
16if [[ ${___ECLASS_ONCE_TOOLCHAIN_FUNCS} != "recur -_+^+_- spank" ]] ; then
17___ECLASS_ONCE_TOOLCHAIN_FUNCS="recur -_+^+_- spank"
9 18
10inherit multilib 19inherit multilib
11 20
12DESCRIPTION="Based on the ${ECLASS} eclass" 21DESCRIPTION="Based on the ${ECLASS} eclass"
13 22
23# tc-getPROG <VAR [search vars]> <default> [tuple]
14tc-getPROG() { 24_tc-getPROG() {
15 local var=$1 25 local tuple=$1
26 local v var vars=$2
16 local prog=$2 27 local prog=$3
17 28
18 if [[ -n ${!var} ]] ; then 29 var=${vars%% *}
19 echo "${!var}" 30 for v in ${vars} ; do
20 return 0
21 fi
22
23 local search=
24 [[ -n $3 ]] && search=$(type -p "$3-${prog}")
25 [[ -z ${search} && -n $(get_abi_CHOST) ]] && search=$(type -p "$(get_abi_CHOST)-${prog}")
26 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
27 [[ -n ${search} ]] && prog=${search##*/}
28
29 export ${var}=${prog}
30 echo "${!var}"
31}
32
33# Returns the name of the archiver
34tc-getAR() { tc-getPROG AR ar "$@"; }
35# Returns the name of the assembler
36tc-getAS() { tc-getPROG AS as "$@"; }
37# Returns the name of the C compiler
38tc-getCC() { tc-getPROG CC gcc "$@"; }
39# Returns the name of the C++ compiler
40tc-getCXX() { tc-getPROG CXX g++ "$@"; }
41# Returns the name of the linker
42tc-getLD() { tc-getPROG LD ld "$@"; }
43# Returns the name of the symbol/object thingy
44tc-getNM() { tc-getPROG NM nm "$@"; }
45# Returns the name of the archiver indexer
46tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
47# Returns the name of the fortran compiler
48tc-getF77() { tc-getPROG F77 f77 "$@"; }
49# Returns the name of the java compiler
50tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
51
52# Returns the name of the C compiler for build
53tc-getBUILD_CC() {
54 local v
55 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
56 if [[ -n ${!v} ]] ; then 31 if [[ -n ${!v} ]] ; then
57 export BUILD_CC=${!v} 32 export ${var}="${!v}"
58 echo "${!v}" 33 echo "${!v}"
59 return 0 34 return 0
60 fi 35 fi
61 done 36 done
62 37
63 local search= 38 local search=
64 if [[ -n ${CBUILD} ]] ; then 39 [[ -n $4 ]] && search=$(type -p "$4-${prog}")
65 search=$(type -p ${CBUILD}-gcc) 40 [[ -z ${search} && -n ${!tuple} ]] && search=$(type -p "${!tuple}-${prog}")
66 search=${search##*/} 41 [[ -n ${search} ]] && prog=${search##*/}
67 else
68 search=gcc
69 fi
70 42
71 export BUILD_CC=${search} 43 export ${var}=${prog}
72 echo "${search}" 44 echo "${!var}"
73} 45}
46tc-getBUILD_PROG() { _tc-getPROG CBUILD "BUILD_$1 $1_FOR_BUILD HOST$1" "${@:2}"; }
47tc-getPROG() { _tc-getPROG CHOST "$@"; }
74 48
49# @FUNCTION: tc-getAR
50# @USAGE: [toolchain prefix]
51# @RETURN: name of the archiver
52tc-getAR() { tc-getPROG AR ar "$@"; }
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:
75# Quick way to export a bunch of vars at once 162# Quick way to export a bunch of compiler vars at once.
76tc-export() { 163tc-export() {
77 local var 164 local var
78 for var in "$@" ; do 165 for var in "$@" ; do
166 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
79 eval tc-get${var} > /dev/null 167 eval tc-get${var} > /dev/null
80 done 168 done
81} 169}
82 170
83# A simple way to see if we're using a cross-compiler ... 171# @FUNCTION: tc-is-cross-compiler
172# @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
84tc-is-cross-compiler() { 173tc-is-cross-compiler() {
85 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]]) 174 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
175}
176
177# @FUNCTION: tc-is-softfloat
178# @DESCRIPTION:
179# See if this toolchain is a softfloat based one.
180# @CODE
181# The possible return values:
182# - only: the target is always softfloat (never had fpu)
183# - yes: the target should support softfloat
184# - no: the target doesn't support softfloat
185# @CODE
186# This allows us to react differently where packages accept
187# softfloat flags in the case where support is optional, but
188# rejects softfloat flags where the target always lacks an fpu.
189tc-is-softfloat() {
190 local CTARGET=${CTARGET:-${CHOST}}
191 case ${CTARGET} in
192 bfin*|h8300*)
193 echo "only" ;;
194 *)
195 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
196 && echo "yes" \
197 || echo "no"
198 ;;
199 esac
200}
201
202# @FUNCTION: tc-is-hardfloat
203# @DESCRIPTION:
204# See if this toolchain is a hardfloat based one.
205# @CODE
206# The possible return values:
207# - yes: the target should support hardfloat
208# - no: the target doesn't support hardfloat
209tc-is-hardfloat() {
210 [[ ${CTARGET//_/-} == *-hardfloat-* ]] \
211 && echo "yes" \
212 || echo "no"
213}
214
215# @FUNCTION: tc-is-static-only
216# @DESCRIPTION:
217# Return shell true if the target does not support shared libs, shell false
218# otherwise.
219tc-is-static-only() {
220 local host=${CTARGET:-${CHOST}}
221
222 # *MiNT doesn't have shared libraries, only platform so far
223 return $([[ ${host} == *-mint* ]])
224}
225
226# @FUNCTION: tc-env_build
227# @USAGE: <command> [command args]
228# @INTERNAL
229# @DESCRIPTION:
230# Setup the compile environment to the build tools and then execute the
231# specified command. We use tc-getBUILD_XX here so that we work with
232# all of the semi-[non-]standard env vars like $BUILD_CC which often
233# the target build system does not check.
234tc-env_build() {
235 CFLAGS=${BUILD_CFLAGS:--O1 -pipe} \
236 CXXFLAGS=${BUILD_CXXFLAGS:--O1 -pipe} \
237 CPPFLAGS=${BUILD_CPPFLAGS} \
238 LDFLAGS=${BUILD_LDFLAGS} \
239 AR=$(tc-getBUILD_AR) \
240 AS=$(tc-getBUILD_AS) \
241 CC=$(tc-getBUILD_CC) \
242 CPP=$(tc-getBUILD_CPP) \
243 CXX=$(tc-getBUILD_CXX) \
244 LD=$(tc-getBUILD_LD) \
245 NM=$(tc-getBUILD_NM) \
246 PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
247 RANLIB=$(tc-getBUILD_RANLIB) \
248 "$@"
249}
250
251# @FUNCTION: econf_build
252# @USAGE: [econf flags]
253# @DESCRIPTION:
254# Sometimes we need to locally build up some tools to run on CBUILD because
255# the package has helper utils which are compiled+executed when compiling.
256# This won't work when cross-compiling as the CHOST is set to a target which
257# we cannot natively execute.
258#
259# For example, the python package will build up a local python binary using
260# a portable build system (configure+make), but then use that binary to run
261# local python scripts to build up other components of the overall python.
262# We cannot rely on the python binary in $PATH as that often times will be
263# a different version, or not even installed in the first place. Instead,
264# we compile the code in a different directory to run on CBUILD, and then
265# use that binary when compiling the main package to run on CHOST.
266#
267# For example, with newer EAPIs, you'd do something like:
268# @CODE
269# src_configure() {
270# ECONF_SOURCE=${S}
271# if tc-is-cross-compiler ; then
272# mkdir "${WORKDIR}"/${CBUILD}
273# pushd "${WORKDIR}"/${CBUILD} >/dev/null
274# econf_build --disable-some-unused-stuff
275# popd >/dev/null
276# fi
277# ... normal build paths ...
278# }
279# src_compile() {
280# if tc-is-cross-compiler ; then
281# pushd "${WORKDIR}"/${CBUILD} >/dev/null
282# emake one-or-two-build-tools
283# ln/mv build-tools to normal build paths in ${S}/
284# popd >/dev/null
285# fi
286# ... normal build paths ...
287# }
288# @CODE
289econf_build() {
290 tc-env_build econf --build=${CBUILD:-${CHOST}} "$@"
291}
292
293# @FUNCTION: tc-has-openmp
294# @USAGE: [toolchain prefix]
295# @DESCRIPTION:
296# See if the toolchain supports OpenMP.
297tc-has-openmp() {
298 local base="${T}/test-tc-openmp"
299 cat <<-EOF > "${base}.c"
300 #include <omp.h>
301 int main() {
302 int nthreads, tid, ret = 0;
303 #pragma omp parallel private(nthreads, tid)
304 {
305 tid = omp_get_thread_num();
306 nthreads = omp_get_num_threads(); ret += tid + nthreads;
307 }
308 return ret;
309 }
310 EOF
311 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
312 local ret=$?
313 rm -f "${base}"*
314 return ${ret}
315}
316
317# @FUNCTION: tc-has-tls
318# @USAGE: [-s|-c|-l] [toolchain prefix]
319# @DESCRIPTION:
320# See if the toolchain supports thread local storage (TLS). Use -s to test the
321# compiler, -c to also test the assembler, and -l to also test the C library
322# (the default).
323tc-has-tls() {
324 local base="${T}/test-tc-tls"
325 cat <<-EOF > "${base}.c"
326 int foo(int *i) {
327 static __thread int j = 0;
328 return *i ? j : *i;
329 }
330 EOF
331 local flags
332 case $1 in
333 -s) flags="-S";;
334 -c) flags="-c";;
335 -l) ;;
336 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
337 esac
338 : ${flags:=-fPIC -shared -Wl,-z,defs}
339 [[ $1 == -* ]] && shift
340 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
341 local ret=$?
342 rm -f "${base}"*
343 return ${ret}
86} 344}
87 345
88 346
89# Parse information from CBUILD/CHOST/CTARGET rather than 347# Parse information from CBUILD/CHOST/CTARGET rather than
90# use external variables from the profile. 348# use external variables from the profile.
95 local host=$2 353 local host=$2
96 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}} 354 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
97 355
98 case ${host} in 356 case ${host} in
99 alpha*) echo alpha;; 357 alpha*) echo alpha;;
100 x86_64*) ninj x86_64 amd64;;
101 arm*) echo arm;; 358 arm*) echo arm;;
359 avr*) ninj avr32 avr;;
360 bfin*) ninj blackfin bfin;;
361 cris*) echo cris;;
102 hppa*) ninj parisc hppa;; 362 hppa*) ninj parisc hppa;;
363 i?86*)
364 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
365 # trees have been unified into 'x86'.
366 # FreeBSD still uses i386
367 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
368 echo i386
369 else
370 echo x86
371 fi
372 ;;
103 ia64*) echo ia64;; 373 ia64*) echo ia64;;
104 m68*) echo m68k;; 374 m68*) echo m68k;;
105 mips*) echo mips;; 375 mips*) echo mips;;
106 powerpc64*) echo ppc64;; 376 nios2*) echo nios2;;
107 powerpc*) [[ ${PROFILE_ARCH} == "ppc64" ]] \ 377 nios*) echo nios;;
108 && ninj ppc64 ppc \ 378 powerpc*)
379 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
380 # have been unified into simply 'powerpc', but until 2.6.16,
381 # ppc32 is still using ARCH="ppc" as default
382 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
383 echo powerpc
384 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
385 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
386 echo powerpc
387 else
109 || echo ppc 388 echo ppc
389 fi
390 elif [[ ${host} == powerpc64* ]] ; then
391 echo ppc64
392 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
393 ninj ppc64 ppc
394 else
395 echo ppc
396 fi
110 ;; 397 ;;
398 s390*) echo s390;;
399 sh64*) ninj sh64 sh;;
400 sh*) echo sh;;
111 sparc64*) ninj sparc64 sparc;; 401 sparc64*) ninj sparc64 sparc;;
112 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \ 402 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
113 && ninj sparc64 sparc \ 403 && ninj sparc64 sparc \
114 || echo sparc 404 || echo sparc
115 ;; 405 ;;
116 s390*) echo s390;; 406 vax*) echo vax;;
117 sh64*) ninj sh64 sh;; 407 x86_64*freebsd*) echo amd64;;
118 sh*) echo sh;; 408 x86_64*)
119 i?86*) ninj i386 x86;; 409 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
120 *) echo ${ARCH};; 410 # trees have been unified into 'x86'.
411 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
412 echo x86
413 else
414 ninj x86_64 amd64
415 fi
416 ;;
417
418 # since our usage of tc-arch is largely concerned with
419 # normalizing inputs for testing ${CTARGET}, let's filter
420 # other cross targets (mingw and such) into the unknown.
421 *) echo unknown;;
121 esac 422 esac
122} 423}
424# @FUNCTION: tc-arch-kernel
425# @USAGE: [toolchain prefix]
426# @RETURN: name of the kernel arch according to the compiler target
123tc-arch-kernel() { 427tc-arch-kernel() {
124 tc-ninja_magic_to_arch kern $@ 428 tc-ninja_magic_to_arch kern "$@"
125} 429}
430# @FUNCTION: tc-arch
431# @USAGE: [toolchain prefix]
432# @RETURN: name of the portage arch according to the compiler target
126tc-arch() { 433tc-arch() {
127 tc-ninja_magic_to_arch portage $@ 434 tc-ninja_magic_to_arch portage "$@"
128} 435}
436
129tc-endian() { 437tc-endian() {
130 local host=$1 438 local host=$1
131 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}} 439 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
132 host=${host%%-*} 440 host=${host%%-*}
133 441
134 case ${host} in 442 case ${host} in
135 alpha*) echo big;; 443 alpha*) echo big;;
136 x86_64*) echo little;;
137 arm*b*) echo big;; 444 arm*b*) echo big;;
138 arm*) echo little;; 445 arm*) echo little;;
446 cris*) echo little;;
139 hppa*) echo big;; 447 hppa*) echo big;;
448 i?86*) echo little;;
140 ia64*) echo little;; 449 ia64*) echo little;;
141 m68*) echo big;; 450 m68*) echo big;;
142 mips*l*) echo little;; 451 mips*l*) echo little;;
143 mips*) echo big;; 452 mips*) echo big;;
144 powerpc*) echo big;; 453 powerpc*) echo big;;
145 sparc*) echo big;;
146 s390*) echo big;; 454 s390*) echo big;;
147 sh*b*) echo big;; 455 sh*b*) echo big;;
148 sh*) echo little;; 456 sh*) echo little;;
457 sparc*) echo big;;
149 i?86*) echo little;; 458 x86_64*) echo little;;
150 *) echo wtf;; 459 *) echo wtf;;
151 esac 460 esac
152} 461}
153 462
154# Returns the version as by `$CC -dumpversion` 463# Internal func. The first argument is the version info to expand.
464# Query the preprocessor to improve compatibility across different
465# compilers rather than maintaining a --version flag matrix. #335943
466_gcc_fullversion() {
467 local ver="$1"; shift
468 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
469 eval echo "$ver"
470}
471
472# @FUNCTION: gcc-fullversion
473# @RETURN: compiler version (major.minor.micro: [3.4.6])
155gcc-fullversion() { 474gcc-fullversion() {
156 echo "$($(tc-getCC) -dumpversion)" 475 _gcc_fullversion '$1.$2.$3' "$@"
157} 476}
158# Returns the version, but only the <major>.<minor> 477# @FUNCTION: gcc-version
478# @RETURN: compiler version (major.minor: [3.4].6)
159gcc-version() { 479gcc-version() {
160 echo "$(gcc-fullversion | cut -f1,2 -d.)" 480 _gcc_fullversion '$1.$2' "$@"
161} 481}
162# Returns the Major version 482# @FUNCTION: gcc-major-version
483# @RETURN: major compiler version (major: [3].4.6)
163gcc-major-version() { 484gcc-major-version() {
164 echo "$(gcc-version | cut -f1 -d.)" 485 _gcc_fullversion '$1' "$@"
165} 486}
166# Returns the Minor version 487# @FUNCTION: gcc-minor-version
488# @RETURN: minor compiler version (minor: 3.[4].6)
167gcc-minor-version() { 489gcc-minor-version() {
168 echo "$(gcc-version | cut -f2 -d.)" 490 _gcc_fullversion '$2' "$@"
169} 491}
170# Returns the Micro version 492# @FUNCTION: gcc-micro-version
493# @RETURN: micro compiler version (micro: 3.4.[6])
171gcc-micro-version() { 494gcc-micro-version() {
172 echo "$(gcc-fullversion | cut -f3 -d. | cut -f1 -d-)" 495 _gcc_fullversion '$3' "$@"
173} 496}
174 497
498# Returns the installation directory - internal toolchain
499# function for use by _gcc-specs-exists (for flag-o-matic).
500_gcc-install-dir() {
501 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
502 awk '$1=="install:" {print $2}')"
503}
504# Returns true if the indicated specs file exists - internal toolchain
505# function for use by flag-o-matic.
506_gcc-specs-exists() {
507 [[ -f $(_gcc-install-dir)/$1 ]]
508}
509
510# Returns requested gcc specs directive unprocessed - for used by
511# gcc-specs-directive()
512# Note; later specs normally overwrite earlier ones; however if a later
513# spec starts with '+' then it appends.
514# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
515# as "Reading <file>", in order. Strictly speaking, if there's a
516# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
517# the same token anything from 'gcc -dumpspecs' is overridden by
518# the contents of $(gcc_install_dir)/specs so the result is the
519# same either way.
520_gcc-specs-directive_raw() {
521 local cc=$(tc-getCC)
522 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
523 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
524'BEGIN { pspec=""; spec=""; outside=1 }
525$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
526 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
527 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
528 { spec=spec $0 }
529END { print spec }'
530 return 0
531}
532
175# Returns requested gcc specs directive 533# Return the requested gcc specs directive, with all included
176# Note; if a spec exists more than once (e.g. in more than one specs file) 534# specs expanded.
177# the last one read is the active definition - i.e. they do not accumulate, 535# Note, it does not check for inclusion loops, which cause it
178# each new definition replaces any previous definition. 536# to never finish - but such loops are invalid for gcc and we're
537# assuming gcc is operational.
179gcc-specs-directive() { 538gcc-specs-directive() {
180 local specfiles=$($(tc-getCC) -v 2>&1 | grep "^Reading" | awk '{print $NF}') 539 local directive subdname subdirective
181 [[ -z ${specfiles} ]] && return 0 540 directive="$(_gcc-specs-directive_raw $1)"
182 awk -v spec=$1 \ 541 while [[ ${directive} == *%\(*\)* ]]; do
183'BEGIN { sstr=""; outside=1 } 542 subdname=${directive/*%\(}
184 $1=="*"spec":" { sstr=""; outside=0; next } 543 subdname=${subdname/\)*}
185 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next } 544 subdirective="$(_gcc-specs-directive_raw ${subdname})"
186 { sstr=sstr $0 } 545 directive="${directive//\%(${subdname})/${subdirective}}"
187END { print sstr }' ${specfiles} 546 done
547 echo "${directive}"
548 return 0
188} 549}
189 550
190# Returns true if gcc sets relro 551# Returns true if gcc sets relro
191gcc-specs-relro() { 552gcc-specs-relro() {
192 local directive 553 local directive
193 directive=$(gcc-specs-directive link_command) 554 directive=$(gcc-specs-directive link_command)
194 return $([[ ${directive/\{!norelro:} != ${directive} ]]) 555 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
195} 556}
196# Returns true if gcc sets now 557# Returns true if gcc sets now
197gcc-specs-now() { 558gcc-specs-now() {
198 local directive 559 local directive
199 directive=$(gcc-specs-directive link_command) 560 directive=$(gcc-specs-directive link_command)
200 return $([[ ${directive/\{!nonow:} != ${directive} ]]) 561 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
201} 562}
202# Returns true if gcc builds PIEs 563# Returns true if gcc builds PIEs
203gcc-specs-pie() { 564gcc-specs-pie() {
204 local directive 565 local directive
205 directive=$(gcc-specs-directive cc1) 566 directive=$(gcc-specs-directive cc1)
206 return $([[ ${directive/\{!nopie:} != ${directive} ]]) 567 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
207} 568}
208# Returns true if gcc builds with the stack protector 569# Returns true if gcc builds with the stack protector
209gcc-specs-ssp() { 570gcc-specs-ssp() {
210 local directive 571 local directive
211 directive=$(gcc-specs-directive cc1) 572 directive=$(gcc-specs-directive cc1)
212 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]]) 573 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
213} 574}
575# Returns true if gcc upgrades fstack-protector to fstack-protector-all
576gcc-specs-ssp-to-all() {
577 local directive
578 directive=$(gcc-specs-directive cc1)
579 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
580}
581# Returns true if gcc builds with fno-strict-overflow
582gcc-specs-nostrict() {
583 local directive
584 directive=$(gcc-specs-directive cc1)
585 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
586}
587
588
589# @FUNCTION: gen_usr_ldscript
590# @USAGE: [-a] <list of libs to create linker scripts for>
591# @DESCRIPTION:
592# This function generate linker scripts in /usr/lib for dynamic
593# libs in /lib. This is to fix linking problems when you have
594# the .so in /lib, and the .a in /usr/lib. What happens is that
595# in some cases when linking dynamic, the .a in /usr/lib is used
596# instead of the .so in /lib due to gcc/libtool tweaking ld's
597# library search path. This causes many builds to fail.
598# See bug #4411 for more info.
599#
600# Note that you should in general use the unversioned name of
601# the library (libfoo.so), as ldconfig should usually update it
602# correctly to point to the latest version of the library present.
603gen_usr_ldscript() {
604 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
605 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
606
607 tc-is-static-only && return
608
609 # Just make sure it exists
610 dodir /usr/${libdir}
611
612 if [[ $1 == "-a" ]] ; then
613 auto=true
614 shift
615 dodir /${libdir}
616 fi
617
618 # OUTPUT_FORMAT gives hints to the linker as to what binary format
619 # is referenced ... makes multilib saner
620 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
621 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
622
623 for lib in "$@" ; do
624 local tlib
625 if ${auto} ; then
626 lib="lib${lib}${suffix}"
627 else
628 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
629 # This especially is for AIX where $(get_libname) can return ".a",
630 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
631 [[ -r ${ED}/${libdir}/${lib} ]] || continue
632 #TODO: better die here?
633 fi
634
635 case ${CTARGET:-${CHOST}} in
636 *-darwin*)
637 if ${auto} ; then
638 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
639 else
640 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
641 fi
642 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
643 tlib=${tlib##*/}
644
645 if ${auto} ; then
646 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
647 # some install_names are funky: they encode a version
648 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
649 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
650 fi
651 rm -f "${ED}"/${libdir}/${lib}
652 fi
653
654 # Mach-O files have an id, which is like a soname, it tells how
655 # another object linking against this lib should reference it.
656 # Since we moved the lib from usr/lib into lib this reference is
657 # wrong. Hence, we update it here. We don't configure with
658 # libdir=/lib because that messes up libtool files.
659 # Make sure we don't lose the specific version, so just modify the
660 # existing install_name
661 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
662 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
663 local nowrite=yes
664 fi
665 install_name_tool \
666 -id "${EPREFIX}"/${libdir}/${tlib} \
667 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
668 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
669 # Now as we don't use GNU binutils and our linker doesn't
670 # understand linker scripts, just create a symlink.
671 pushd "${ED}/usr/${libdir}" > /dev/null
672 ln -snf "../../${libdir}/${tlib}" "${lib}"
673 popd > /dev/null
674 ;;
675 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
676 if ${auto} ; then
677 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
678 # no way to retrieve soname on these platforms (?)
679 tlib=$(readlink "${ED}"/${libdir}/${lib})
680 tlib=${tlib##*/}
681 if [[ -z ${tlib} ]] ; then
682 # ok, apparently was not a symlink, don't remove it and
683 # just link to it
684 tlib=${lib}
685 else
686 rm -f "${ED}"/${libdir}/${lib}
687 fi
688 else
689 tlib=${lib}
690 fi
691
692 # we don't have GNU binutils on these platforms, so we symlink
693 # instead, which seems to work fine. Keep it relative, otherwise
694 # we break some QA checks in Portage
695 # on interix, the linker scripts would work fine in _most_
696 # situations. if a library links to such a linker script the
697 # absolute path to the correct library is inserted into the binary,
698 # which is wrong, since anybody linking _without_ libtool will miss
699 # some dependencies, since the stupid linker cannot find libraries
700 # hardcoded with absolute paths (as opposed to the loader, which
701 # seems to be able to do this).
702 # this has been seen while building shared-mime-info which needs
703 # libxml2, but links without libtool (and does not add libz to the
704 # command line by itself).
705 pushd "${ED}/usr/${libdir}" > /dev/null
706 ln -snf "../../${libdir}/${tlib}" "${lib}"
707 popd > /dev/null
708 ;;
709 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
710 if ${auto} ; then
711 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
712 [[ -z ${tlib} ]] && tlib=${lib}
713 tlib=${tlib##*/} # 'internal name' can have a path component
714 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
715 # some SONAMEs are funky: they encode a version before the .so
716 if [[ ${tlib} != ${lib}* ]] ; then
717 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
718 fi
719 [[ ${tlib} != ${lib} ]] &&
720 rm -f "${ED}"/${libdir}/${lib}
721 else
722 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
723 [[ -z ${tlib} ]] && tlib=${lib}
724 tlib=${tlib##*/} # 'internal name' can have a path component
725 fi
726 pushd "${ED}"/usr/${libdir} >/dev/null
727 ln -snf "../../${libdir}/${tlib}" "${lib}"
728 # need the internal name in usr/lib too, to be available at runtime
729 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
730 [[ ${tlib} != ${lib} ]] &&
731 ln -snf "../../${libdir}/${tlib}" "${tlib}"
732 popd >/dev/null
733 ;;
734 *)
735 if ${auto} ; then
736 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
737 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
738 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
739 # some SONAMEs are funky: they encode a version before the .so
740 if [[ ${tlib} != ${lib}* ]] ; then
741 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
742 fi
743 rm -f "${ED}"/${libdir}/${lib}
744 else
745 tlib=${lib}
746 fi
747 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
748 /* GNU ld script
749 Since Gentoo has critical dynamic libraries in /lib, and the static versions
750 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
751 run into linking problems. This "fake" dynamic lib is a linker script that
752 redirects the linker to the real lib. And yes, this works in the cross-
753 compiling scenario as the sysroot-ed linker will prepend the real path.
754
755 See bug http://bugs.gentoo.org/4411 for more info.
756 */
757 ${output_format}
758 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
759 END_LDSCRIPT
760 ;;
761 esac
762 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
763 done
764}
765
766fi

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