/[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 1.45 2005/10/06 01:52:51 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.109 2011/12/10 19:45:00 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 fi
68 search=${search:-gcc}
69 42
70 export BUILD_CC=${search} 43 export ${var}=${prog}
71 echo "${search}" 44 echo "${!var}"
72} 45}
46tc-getBUILD_PROG() { _tc-getPROG CBUILD "BUILD_$1 $1_FOR_BUILD HOST$1" "${@:2}"; }
47tc-getPROG() { _tc-getPROG CHOST "$@"; }
73 48
49# @FUNCTION: tc-getAR
50# @USAGE: [toolchain prefix]
51# @RETURN: name of the archiver
52tc-getAR() { tc-getPROG AR ar "$@"; }
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:
74# Quick way to export a bunch of vars at once 162# Quick way to export a bunch of compiler vars at once.
75tc-export() { 163tc-export() {
76 local var 164 local var
77 for var in "$@" ; do 165 for var in "$@" ; do
166 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
78 eval tc-get${var} > /dev/null 167 eval tc-get${var} > /dev/null
79 done 168 done
80} 169}
81 170
82# 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
83tc-is-cross-compiler() { 173tc-is-cross-compiler() {
84 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 case ${CTARGET} in
191 bfin*|h8300*)
192 echo "only" ;;
193 *)
194 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
195 && echo "yes" \
196 || echo "no"
197 ;;
198 esac
199}
200
201# @FUNCTION: tc-is-hardfloat
202# @DESCRIPTION:
203# See if this toolchain is a hardfloat based one.
204# @CODE
205# The possible return values:
206# - yes: the target should support hardfloat
207# - no: the target doesn't support hardfloat
208tc-is-hardfloat() {
209 [[ ${CTARGET//_/-} == *-hardfloat-* ]] \
210 && echo "yes" \
211 || echo "no"
212}
213
214# @FUNCTION: tc-is-static-only
215# @DESCRIPTION:
216# Return shell true if the target does not support shared libs, shell false
217# otherwise.
218tc-is-static-only() {
219 local host=${CTARGET:-${CHOST}}
220
221 # *MiNT doesn't have shared libraries, only platform so far
222 return $([[ ${host} == *-mint* ]])
223}
224
225# @FUNCTION: tc-env_build
226# @USAGE: <command> [command args]
227# @INTERNAL
228# @DESCRIPTION:
229# Setup the compile environment to the build tools and then execute the
230# specified command. We use tc-getBUILD_XX here so that we work with
231# all of the semi-[non-]standard env vars like $BUILD_CC which often
232# the target build system does not check.
233tc-env_build() {
234 CFLAGS=${BUILD_CFLAGS:--O1 -pipe} \
235 CXXFLAGS=${BUILD_CXXFLAGS:--O1 -pipe} \
236 CPPFLAGS=${BUILD_CPPFLAGS} \
237 LDFLAGS=${BUILD_LDFLAGS} \
238 AR=$(tc-getBUILD_AR) \
239 AS=$(tc-getBUILD_AS) \
240 CC=$(tc-getBUILD_CC) \
241 CPP=$(tc-getBUILD_CPP) \
242 CXX=$(tc-getBUILD_CXX) \
243 LD=$(tc-getBUILD_LD) \
244 NM=$(tc-getBUILD_NM) \
245 PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
246 RANLIB=$(tc-getBUILD_RANLIB) \
247 "$@"
248}
249
250# @FUNCTION: econf_build
251# @USAGE: [econf flags]
252# @DESCRIPTION:
253# Sometimes we need to locally build up some tools to run on CBUILD because
254# the package has helper utils which are compiled+executed when compiling.
255# This won't work when cross-compiling as the CHOST is set to a target which
256# we cannot natively execute.
257#
258# For example, the python package will build up a local python binary using
259# a portable build system (configure+make), but then use that binary to run
260# local python scripts to build up other components of the overall python.
261# We cannot rely on the python binary in $PATH as that often times will be
262# a different version, or not even installed in the first place. Instead,
263# we compile the code in a different directory to run on CBUILD, and then
264# use that binary when compiling the main package to run on CHOST.
265#
266# For example, with newer EAPIs, you'd do something like:
267# @CODE
268# src_configure() {
269# ECONF_SOURCE=${S}
270# if tc-is-cross-compiler ; then
271# mkdir "${WORKDIR}"/${CBUILD}
272# pushd "${WORKDIR}"/${CBUILD} >/dev/null
273# econf_build --disable-some-unused-stuff
274# popd >/dev/null
275# fi
276# ... normal build paths ...
277# }
278# src_compile() {
279# if tc-is-cross-compiler ; then
280# pushd "${WORKDIR}"/${CBUILD} >/dev/null
281# emake one-or-two-build-tools
282# ln/mv build-tools to normal build paths in ${S}/
283# popd >/dev/null
284# fi
285# ... normal build paths ...
286# }
287# @CODE
288econf_build() {
289 tc-env_build econf --build=${CBUILD:-${CHOST}} "$@"
290}
291
292# @FUNCTION: tc-has-openmp
293# @USAGE: [toolchain prefix]
294# @DESCRIPTION:
295# See if the toolchain supports OpenMP.
296tc-has-openmp() {
297 local base="${T}/test-tc-openmp"
298 cat <<-EOF > "${base}.c"
299 #include <omp.h>
300 int main() {
301 int nthreads, tid, ret = 0;
302 #pragma omp parallel private(nthreads, tid)
303 {
304 tid = omp_get_thread_num();
305 nthreads = omp_get_num_threads(); ret += tid + nthreads;
306 }
307 return ret;
308 }
309 EOF
310 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
311 local ret=$?
312 rm -f "${base}"*
313 return ${ret}
314}
315
316# @FUNCTION: tc-has-tls
317# @USAGE: [-s|-c|-l] [toolchain prefix]
318# @DESCRIPTION:
319# See if the toolchain supports thread local storage (TLS). Use -s to test the
320# compiler, -c to also test the assembler, and -l to also test the C library
321# (the default).
322tc-has-tls() {
323 local base="${T}/test-tc-tls"
324 cat <<-EOF > "${base}.c"
325 int foo(int *i) {
326 static __thread int j = 0;
327 return *i ? j : *i;
328 }
329 EOF
330 local flags
331 case $1 in
332 -s) flags="-S";;
333 -c) flags="-c";;
334 -l) ;;
335 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
336 esac
337 : ${flags:=-fPIC -shared -Wl,-z,defs}
338 [[ $1 == -* ]] && shift
339 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
340 local ret=$?
341 rm -f "${base}"*
342 return ${ret}
85} 343}
86 344
87 345
88# Parse information from CBUILD/CHOST/CTARGET rather than 346# Parse information from CBUILD/CHOST/CTARGET rather than
89# use external variables from the profile. 347# use external variables from the profile.
94 local host=$2 352 local host=$2
95 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}} 353 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
96 354
97 case ${host} in 355 case ${host} in
98 alpha*) echo alpha;; 356 alpha*) echo alpha;;
99 x86_64*) ninj x86_64 amd64;;
100 arm*) echo arm;; 357 arm*) echo arm;;
101 thumb*) echo arm;; 358 avr*) ninj avr32 avr;;
359 bfin*) ninj blackfin bfin;;
360 cris*) echo cris;;
102 hppa*) ninj parisc hppa;; 361 hppa*) ninj parisc hppa;;
362 i?86*)
363 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
364 # trees have been unified into 'x86'.
365 # FreeBSD still uses i386
366 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
367 echo i386
368 else
369 echo x86
370 fi
371 ;;
103 ia64*) echo ia64;; 372 ia64*) echo ia64;;
104 m68*) echo m68k;; 373 m68*) echo m68k;;
105 mips*) echo mips;; 374 mips*) echo mips;;
106 powerpc64*) echo ppc64;; 375 nios2*) echo nios2;;
107 powerpc*) [[ ${PROFILE_ARCH} == "ppc64" ]] \ 376 nios*) echo nios;;
108 && ninj ppc64 ppc \ 377 powerpc*)
378 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
379 # have been unified into simply 'powerpc', but until 2.6.16,
380 # ppc32 is still using ARCH="ppc" as default
381 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
382 echo powerpc
383 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
384 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
385 echo powerpc
386 else
109 || echo ppc 387 echo ppc
388 fi
389 elif [[ ${host} == powerpc64* ]] ; then
390 echo ppc64
391 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
392 ninj ppc64 ppc
393 else
394 echo ppc
395 fi
110 ;; 396 ;;
397 s390*) echo s390;;
398 sh64*) ninj sh64 sh;;
399 sh*) echo sh;;
111 sparc64*) ninj sparc64 sparc;; 400 sparc64*) ninj sparc64 sparc;;
112 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \ 401 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
113 && ninj sparc64 sparc \ 402 && ninj sparc64 sparc \
114 || echo sparc 403 || echo sparc
115 ;; 404 ;;
116 s390*) echo s390;; 405 vax*) echo vax;;
117 sh64*) ninj sh64 sh;; 406 x86_64*freebsd*) echo amd64;;
118 sh*) echo sh;; 407 x86_64*)
119 i?86*) ninj i386 x86;; 408 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
120 *) echo ${ARCH};; 409 # trees have been unified into 'x86'.
410 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
411 echo x86
412 else
413 ninj x86_64 amd64
414 fi
415 ;;
416
417 # since our usage of tc-arch is largely concerned with
418 # normalizing inputs for testing ${CTARGET}, let's filter
419 # other cross targets (mingw and such) into the unknown.
420 *) echo unknown;;
121 esac 421 esac
122} 422}
423# @FUNCTION: tc-arch-kernel
424# @USAGE: [toolchain prefix]
425# @RETURN: name of the kernel arch according to the compiler target
123tc-arch-kernel() { 426tc-arch-kernel() {
124 tc-ninja_magic_to_arch kern $@ 427 tc-ninja_magic_to_arch kern "$@"
125} 428}
429# @FUNCTION: tc-arch
430# @USAGE: [toolchain prefix]
431# @RETURN: name of the portage arch according to the compiler target
126tc-arch() { 432tc-arch() {
127 tc-ninja_magic_to_arch portage $@ 433 tc-ninja_magic_to_arch portage "$@"
128} 434}
435
129tc-endian() { 436tc-endian() {
130 local host=$1 437 local host=$1
131 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}} 438 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
132 host=${host%%-*} 439 host=${host%%-*}
133 440
134 case ${host} in 441 case ${host} in
135 alpha*) echo big;; 442 alpha*) echo big;;
136 x86_64*) echo little;;
137 arm*b*) echo big;; 443 arm*b*) echo big;;
138 arm*) echo little;; 444 arm*) echo little;;
139 thumb*) echo little;; 445 cris*) echo little;;
140 hppa*) echo big;; 446 hppa*) echo big;;
447 i?86*) echo little;;
141 ia64*) echo little;; 448 ia64*) echo little;;
142 m68*) echo big;; 449 m68*) echo big;;
143 mips*l*) echo little;; 450 mips*l*) echo little;;
144 mips*) echo big;; 451 mips*) echo big;;
145 powerpc*) echo big;; 452 powerpc*) echo big;;
146 sparc*) echo big;;
147 s390*) echo big;; 453 s390*) echo big;;
148 sh*b*) echo big;; 454 sh*b*) echo big;;
149 sh*) echo little;; 455 sh*) echo little;;
456 sparc*) echo big;;
150 i?86*) echo little;; 457 x86_64*) echo little;;
151 *) echo wtf;; 458 *) echo wtf;;
152 esac 459 esac
153} 460}
154 461
155# Returns the version as by `$CC -dumpversion` 462# Internal func. The first argument is the version info to expand.
463# Query the preprocessor to improve compatibility across different
464# compilers rather than maintaining a --version flag matrix. #335943
465_gcc_fullversion() {
466 local ver="$1"; shift
467 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
468 eval echo "$ver"
469}
470
471# @FUNCTION: gcc-fullversion
472# @RETURN: compiler version (major.minor.micro: [3.4.6])
156gcc-fullversion() { 473gcc-fullversion() {
157 echo "$($(tc-getCC) -dumpversion)" 474 _gcc_fullversion '$1.$2.$3' "$@"
158} 475}
159# Returns the version, but only the <major>.<minor> 476# @FUNCTION: gcc-version
477# @RETURN: compiler version (major.minor: [3.4].6)
160gcc-version() { 478gcc-version() {
161 echo "$(gcc-fullversion | cut -f1,2 -d.)" 479 _gcc_fullversion '$1.$2' "$@"
162} 480}
163# Returns the Major version 481# @FUNCTION: gcc-major-version
482# @RETURN: major compiler version (major: [3].4.6)
164gcc-major-version() { 483gcc-major-version() {
165 echo "$(gcc-version | cut -f1 -d.)" 484 _gcc_fullversion '$1' "$@"
166} 485}
167# Returns the Minor version 486# @FUNCTION: gcc-minor-version
487# @RETURN: minor compiler version (minor: 3.[4].6)
168gcc-minor-version() { 488gcc-minor-version() {
169 echo "$(gcc-version | cut -f2 -d.)" 489 _gcc_fullversion '$2' "$@"
170} 490}
171# Returns the Micro version 491# @FUNCTION: gcc-micro-version
492# @RETURN: micro compiler version (micro: 3.4.[6])
172gcc-micro-version() { 493gcc-micro-version() {
173 echo "$(gcc-fullversion | cut -f3 -d. | cut -f1 -d-)" 494 _gcc_fullversion '$3' "$@"
174} 495}
175 496
497# Returns the installation directory - internal toolchain
498# function for use by _gcc-specs-exists (for flag-o-matic).
499_gcc-install-dir() {
500 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
501 awk '$1=="install:" {print $2}')"
502}
503# Returns true if the indicated specs file exists - internal toolchain
504# function for use by flag-o-matic.
505_gcc-specs-exists() {
506 [[ -f $(_gcc-install-dir)/$1 ]]
507}
508
509# Returns requested gcc specs directive unprocessed - for used by
510# gcc-specs-directive()
511# Note; later specs normally overwrite earlier ones; however if a later
512# spec starts with '+' then it appends.
513# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
514# as "Reading <file>", in order. Strictly speaking, if there's a
515# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
516# the same token anything from 'gcc -dumpspecs' is overridden by
517# the contents of $(gcc_install_dir)/specs so the result is the
518# same either way.
519_gcc-specs-directive_raw() {
520 local cc=$(tc-getCC)
521 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
522 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
523'BEGIN { pspec=""; spec=""; outside=1 }
524$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
525 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
526 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
527 { spec=spec $0 }
528END { print spec }'
529 return 0
530}
531
176# Returns requested gcc specs directive 532# Return the requested gcc specs directive, with all included
177# Note; if a spec exists more than once (e.g. in more than one specs file) 533# specs expanded.
178# the last one read is the active definition - i.e. they do not accumulate, 534# Note, it does not check for inclusion loops, which cause it
179# each new definition replaces any previous definition. 535# to never finish - but such loops are invalid for gcc and we're
536# assuming gcc is operational.
180gcc-specs-directive() { 537gcc-specs-directive() {
181 local specfiles=$($(tc-getCC) -v 2>&1 | grep "^Reading" | awk '{print $NF}') 538 local directive subdname subdirective
182 [[ -z ${specfiles} ]] && return 0 539 directive="$(_gcc-specs-directive_raw $1)"
183 awk -v spec=$1 \ 540 while [[ ${directive} == *%\(*\)* ]]; do
184'BEGIN { sstr=""; outside=1 } 541 subdname=${directive/*%\(}
185 $1=="*"spec":" { sstr=""; outside=0; next } 542 subdname=${subdname/\)*}
186 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next } 543 subdirective="$(_gcc-specs-directive_raw ${subdname})"
187 { sstr=sstr $0 } 544 directive="${directive//\%(${subdname})/${subdirective}}"
188END { print sstr }' ${specfiles} 545 done
546 echo "${directive}"
547 return 0
189} 548}
190 549
191# Returns true if gcc sets relro 550# Returns true if gcc sets relro
192gcc-specs-relro() { 551gcc-specs-relro() {
193 local directive 552 local directive
194 directive=$(gcc-specs-directive link_command) 553 directive=$(gcc-specs-directive link_command)
195 return $([[ ${directive/\{!norelro:} != ${directive} ]]) 554 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
196} 555}
197# Returns true if gcc sets now 556# Returns true if gcc sets now
198gcc-specs-now() { 557gcc-specs-now() {
199 local directive 558 local directive
200 directive=$(gcc-specs-directive link_command) 559 directive=$(gcc-specs-directive link_command)
201 return $([[ ${directive/\{!nonow:} != ${directive} ]]) 560 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
202} 561}
203# Returns true if gcc builds PIEs 562# Returns true if gcc builds PIEs
204gcc-specs-pie() { 563gcc-specs-pie() {
205 local directive 564 local directive
206 directive=$(gcc-specs-directive cc1) 565 directive=$(gcc-specs-directive cc1)
207 return $([[ ${directive/\{!nopie:} != ${directive} ]]) 566 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
208} 567}
209# Returns true if gcc builds with the stack protector 568# Returns true if gcc builds with the stack protector
210gcc-specs-ssp() { 569gcc-specs-ssp() {
211 local directive 570 local directive
212 directive=$(gcc-specs-directive cc1) 571 directive=$(gcc-specs-directive cc1)
213 return $([[ ${directive/\{!fno-stack-protector:} != ${directive} ]]) 572 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
214} 573}
574# Returns true if gcc upgrades fstack-protector to fstack-protector-all
575gcc-specs-ssp-to-all() {
576 local directive
577 directive=$(gcc-specs-directive cc1)
578 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
579}
580# Returns true if gcc builds with fno-strict-overflow
581gcc-specs-nostrict() {
582 local directive
583 directive=$(gcc-specs-directive cc1)
584 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
585}
586
587
588# @FUNCTION: gen_usr_ldscript
589# @USAGE: [-a] <list of libs to create linker scripts for>
590# @DESCRIPTION:
591# This function generate linker scripts in /usr/lib for dynamic
592# libs in /lib. This is to fix linking problems when you have
593# the .so in /lib, and the .a in /usr/lib. What happens is that
594# in some cases when linking dynamic, the .a in /usr/lib is used
595# instead of the .so in /lib due to gcc/libtool tweaking ld's
596# library search path. This causes many builds to fail.
597# See bug #4411 for more info.
598#
599# Note that you should in general use the unversioned name of
600# the library (libfoo.so), as ldconfig should usually update it
601# correctly to point to the latest version of the library present.
602gen_usr_ldscript() {
603 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
604 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
605
606 tc-is-static-only && return
607
608 # Just make sure it exists
609 dodir /usr/${libdir}
610
611 if [[ $1 == "-a" ]] ; then
612 auto=true
613 shift
614 dodir /${libdir}
615 fi
616
617 # OUTPUT_FORMAT gives hints to the linker as to what binary format
618 # is referenced ... makes multilib saner
619 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
620 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
621
622 for lib in "$@" ; do
623 local tlib
624 if ${auto} ; then
625 lib="lib${lib}${suffix}"
626 else
627 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
628 # This especially is for AIX where $(get_libname) can return ".a",
629 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
630 [[ -r ${ED}/${libdir}/${lib} ]] || continue
631 #TODO: better die here?
632 fi
633
634 case ${CTARGET:-${CHOST}} in
635 *-darwin*)
636 if ${auto} ; then
637 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
638 else
639 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
640 fi
641 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
642 tlib=${tlib##*/}
643
644 if ${auto} ; then
645 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
646 # some install_names are funky: they encode a version
647 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
648 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
649 fi
650 rm -f "${ED}"/${libdir}/${lib}
651 fi
652
653 # Mach-O files have an id, which is like a soname, it tells how
654 # another object linking against this lib should reference it.
655 # Since we moved the lib from usr/lib into lib this reference is
656 # wrong. Hence, we update it here. We don't configure with
657 # libdir=/lib because that messes up libtool files.
658 # Make sure we don't lose the specific version, so just modify the
659 # existing install_name
660 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
661 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
662 local nowrite=yes
663 fi
664 install_name_tool \
665 -id "${EPREFIX}"/${libdir}/${tlib} \
666 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
667 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
668 # Now as we don't use GNU binutils and our linker doesn't
669 # understand linker scripts, just create a symlink.
670 pushd "${ED}/usr/${libdir}" > /dev/null
671 ln -snf "../../${libdir}/${tlib}" "${lib}"
672 popd > /dev/null
673 ;;
674 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
675 if ${auto} ; then
676 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
677 # no way to retrieve soname on these platforms (?)
678 tlib=$(readlink "${ED}"/${libdir}/${lib})
679 tlib=${tlib##*/}
680 if [[ -z ${tlib} ]] ; then
681 # ok, apparently was not a symlink, don't remove it and
682 # just link to it
683 tlib=${lib}
684 else
685 rm -f "${ED}"/${libdir}/${lib}
686 fi
687 else
688 tlib=${lib}
689 fi
690
691 # we don't have GNU binutils on these platforms, so we symlink
692 # instead, which seems to work fine. Keep it relative, otherwise
693 # we break some QA checks in Portage
694 # on interix, the linker scripts would work fine in _most_
695 # situations. if a library links to such a linker script the
696 # absolute path to the correct library is inserted into the binary,
697 # which is wrong, since anybody linking _without_ libtool will miss
698 # some dependencies, since the stupid linker cannot find libraries
699 # hardcoded with absolute paths (as opposed to the loader, which
700 # seems to be able to do this).
701 # this has been seen while building shared-mime-info which needs
702 # libxml2, but links without libtool (and does not add libz to the
703 # command line by itself).
704 pushd "${ED}/usr/${libdir}" > /dev/null
705 ln -snf "../../${libdir}/${tlib}" "${lib}"
706 popd > /dev/null
707 ;;
708 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
709 if ${auto} ; then
710 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
711 [[ -z ${tlib} ]] && tlib=${lib}
712 tlib=${tlib##*/} # 'internal name' can have a path component
713 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
714 # some SONAMEs are funky: they encode a version before the .so
715 if [[ ${tlib} != ${lib}* ]] ; then
716 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
717 fi
718 [[ ${tlib} != ${lib} ]] &&
719 rm -f "${ED}"/${libdir}/${lib}
720 else
721 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
722 [[ -z ${tlib} ]] && tlib=${lib}
723 tlib=${tlib##*/} # 'internal name' can have a path component
724 fi
725 pushd "${ED}"/usr/${libdir} >/dev/null
726 ln -snf "../../${libdir}/${tlib}" "${lib}"
727 # need the internal name in usr/lib too, to be available at runtime
728 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
729 [[ ${tlib} != ${lib} ]] &&
730 ln -snf "../../${libdir}/${tlib}" "${tlib}"
731 popd >/dev/null
732 ;;
733 *)
734 if ${auto} ; then
735 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
736 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
737 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
738 # some SONAMEs are funky: they encode a version before the .so
739 if [[ ${tlib} != ${lib}* ]] ; then
740 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
741 fi
742 rm -f "${ED}"/${libdir}/${lib}
743 else
744 tlib=${lib}
745 fi
746 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
747 /* GNU ld script
748 Since Gentoo has critical dynamic libraries in /lib, and the static versions
749 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
750 run into linking problems. This "fake" dynamic lib is a linker script that
751 redirects the linker to the real lib. And yes, this works in the cross-
752 compiling scenario as the sysroot-ed linker will prepend the real path.
753
754 See bug http://bugs.gentoo.org/4411 for more info.
755 */
756 ${output_format}
757 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
758 END_LDSCRIPT
759 ;;
760 esac
761 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
762 done
763}
764
765fi

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