/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.23 Revision 1.107
1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2007 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 1.23 2005/01/15 01:19:28 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.107 2011/09/12 21:42:08 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.
9 15
10ECLASS=toolchain-funcs 16___ECLASS_RECUR_TOOLCHAIN_FUNCS="yes"
11INHERITED="$INHERITED $ECLASS" 17[[ -z ${___ECLASS_RECUR_MULTILIB} ]] && inherit multilib
12 18
13DESCRIPTION="Based on the ${ECLASS} eclass" 19DESCRIPTION="Based on the ${ECLASS} eclass"
14 20
21# tc-getPROG <VAR [search vars]> <default> [tuple]
15tc-getPROG() { 22_tc-getPROG() {
16 local var=$1 23 local tuple=$1
24 local v var vars=$2
17 local prog=$2 25 local prog=$3
18 26
27 var=${vars%% *}
28 for v in ${vars} ; do
19 if [[ -n ${!var} ]] ; then 29 if [[ -n ${!v} ]] ; then
30 export ${var}="${!v}"
20 echo "${!var}" 31 echo "${!v}"
21 return 0 32 return 0
22 fi 33 fi
34 done
23 35
24 if [[ -n ${CHOST} ]] ; then 36 local search=
25 local search=$(type -p "${CHOST}-${prog}") 37 [[ -n $4 ]] && search=$(type -p "$4-${prog}")
38 [[ -z ${search} && -n ${!tuple} ]] && search=$(type -p "${!tuple}-${prog}")
26 [[ -n ${search} ]] && prog=${search##*/} 39 [[ -n ${search} ]] && prog=${search##*/}
27 fi
28 40
29 export ${var}=${prog} 41 export ${var}=${prog}
30 echo "${!var}" 42 echo "${!var}"
31} 43}
44tc-getBUILD_PROG() { _tc-getPROG CBUILD "BUILD_$1 $1_FOR_BUILD HOST$1" "${@:2}"; }
45tc-getPROG() { _tc-getPROG CHOST "$@"; }
32 46
33# Returns the name of the archiver 47# @FUNCTION: tc-getAR
48# @USAGE: [toolchain prefix]
49# @RETURN: name of the archiver
34tc-getAR() { tc-getPROG AR ar; } 50tc-getAR() { tc-getPROG AR ar "$@"; }
35# Returns the name of the assembler 51# @FUNCTION: tc-getAS
52# @USAGE: [toolchain prefix]
53# @RETURN: name of the assembler
36tc-getAS() { tc-getPROG AS as; } 54tc-getAS() { tc-getPROG AS as "$@"; }
55# @FUNCTION: tc-getCC
56# @USAGE: [toolchain prefix]
37# Returns the name of the C compiler 57# @RETURN: name of the C compiler
38tc-getCC() { tc-getPROG CC gcc; } 58tc-getCC() { tc-getPROG CC gcc "$@"; }
59# @FUNCTION: tc-getCPP
60# @USAGE: [toolchain prefix]
61# @RETURN: name of the C preprocessor
62tc-getCPP() { tc-getPROG CPP cpp "$@"; }
63# @FUNCTION: tc-getCXX
64# @USAGE: [toolchain prefix]
39# Returns the name of the C++ compiler 65# @RETURN: name of the C++ compiler
40tc-getCXX() { tc-getPROG CXX g++; } 66tc-getCXX() { tc-getPROG CXX g++ "$@"; }
41# Returns the name of the linker 67# @FUNCTION: tc-getLD
68# @USAGE: [toolchain prefix]
69# @RETURN: name of the linker
42tc-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]
43# Returns the name of the symbol/object thingy 77# @RETURN: name of the symbol/object thingy
44tc-getNM() { tc-getPROG NM nm; } 78tc-getNM() { tc-getPROG NM nm "$@"; }
79# @FUNCTION: tc-getRANLIB
80# @USAGE: [toolchain prefix]
45# Returns the name of the archiver indexer 81# @RETURN: name of the archiver indexer
46tc-getRANLIB() { tc-getPROG RANLIB ranlib; } 82tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
47# 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 "$@"; }
87# @FUNCTION: tc-getF77
88# @USAGE: [toolchain prefix]
89# @RETURN: name of the Fortran 77 compiler
48tc-getF77() { tc-getPROG F77 f77; } 90tc-getF77() { tc-getPROG F77 gfortran "$@"; }
91# @FUNCTION: tc-getFC
92# @USAGE: [toolchain prefix]
93# @RETURN: name of the Fortran 90 compiler
94tc-getFC() { tc-getPROG FC gfortran "$@"; }
95# @FUNCTION: tc-getGCJ
96# @USAGE: [toolchain prefix]
49# Returns the name of the java compiler 97# @RETURN: name of the java compiler
50tc-getGCJ() { tc-getPROG GCJ gcj; } 98tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
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 "$@"; }
51 111
52# Returns the name of the C compiler for build 112# @FUNCTION: tc-getBUILD_AR
53tc-getBUILD_CC() { 113# @USAGE: [toolchain prefix]
54 if [[ -n ${CC_FOR_BUILD} ]] ; then 114# @RETURN: name of the archiver for building binaries to run on the build machine
55 export BUILD_CC=${CC_FOR_BUILD} 115tc-getBUILD_AR() { tc-getBUILD_PROG AR ar "$@"; }
56 echo "${CC_FOR_BUILD}" 116# @FUNCTION: tc-getBUILD_AS
57 return 0 117# @USAGE: [toolchain prefix]
58 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 "$@"; }
152# @FUNCTION: tc-getBUILD_PKG_CONFIG
153# @USAGE: [toolchain prefix]
154# @RETURN: name of the pkg-config tool for building binaries to run on the build machine
155tc-getBUILD_PKG_CONFIG() { tc-getBUILD_PROG PKG_CONFIG pkg-config "$@"; }
59 156
60 local search= 157# @FUNCTION: tc-export
61 if [[ -n ${CBUILD} ]] ; then 158# @USAGE: <list of toolchain variables>
62 search=$(type -p ${CBUILD}-gcc) 159# @DESCRIPTION:
63 search=${search##*/}
64 else
65 search=gcc
66 fi
67
68 export BUILD_CC=${search}
69 echo "${search}"
70}
71
72# Quick way to export a bunch of vars at once 160# Quick way to export a bunch of compiler vars at once.
73tc-export() { 161tc-export() {
74 local var 162 local var
75 for var in "$@" ; do 163 for var in "$@" ; do
164 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
76 eval tc-get${var} 165 eval tc-get${var} > /dev/null
77 done 166 done
78} 167}
79 168
80# 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
81tc-is-cross-compiler() { 171tc-is-cross-compiler() {
82 if [[ -n ${CBUILD} ]] ; then
83 return $([[ ${CBUILD} != ${CHOST} ]]) 172 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
84 fi
85 return 1
86} 173}
87 174
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# - no: the target doesn't support softfloat
183# @CODE
184# This allows us to react differently where packages accept
185# softfloat flags in the case where support is optional, but
186# rejects softfloat flags where the target always lacks an fpu.
187tc-is-softfloat() {
188 case ${CTARGET} in
189 bfin*|h8300*)
190 echo "only" ;;
191 *)
192 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
193 && echo "yes" \
194 || echo "no"
195 ;;
196 esac
197}
88 198
199# @FUNCTION: tc-is-hardfloat
200# @DESCRIPTION:
201# See if this toolchain is a hardfloat based one.
202# @CODE
203# The possible return values:
204# - yes: the target should support hardfloat
205# - no: the target doesn't support hardfloat
206tc-is-hardfloat() {
207 [[ ${CTARGET//_/-} == *-hardfloat-* ]] \
208 && echo "yes" \
209 || echo "no"
210}
211
212# @FUNCTION: tc-is-static-only
213# @DESCRIPTION:
214# Return shell true if the target does not support shared libs, shell false
215# otherwise.
216tc-is-static-only() {
217 local host=${CTARGET:-${CHOST}}
218
219 # *MiNT doesn't have shared libraries, only platform so far
220 return $([[ ${host} == *-mint* ]])
221}
222
223# @FUNCTION: tc-has-openmp
224# @USAGE: [toolchain prefix]
225# @DESCRIPTION:
226# See if the toolchain supports OpenMP.
227tc-has-openmp() {
228 local base="${T}/test-tc-openmp"
229 cat <<-EOF > "${base}.c"
230 #include <omp.h>
231 int main() {
232 int nthreads, tid, ret = 0;
233 #pragma omp parallel private(nthreads, tid)
234 {
235 tid = omp_get_thread_num();
236 nthreads = omp_get_num_threads(); ret += tid + nthreads;
237 }
238 return ret;
239 }
240 EOF
241 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
242 local ret=$?
243 rm -f "${base}"*
244 return ${ret}
245}
246
247# @FUNCTION: tc-has-tls
248# @USAGE: [-s|-c|-l] [toolchain prefix]
249# @DESCRIPTION:
250# See if the toolchain supports thread local storage (TLS). Use -s to test the
251# compiler, -c to also test the assembler, and -l to also test the C library
252# (the default).
253tc-has-tls() {
254 local base="${T}/test-tc-tls"
255 cat <<-EOF > "${base}.c"
256 int foo(int *i) {
257 static __thread int j = 0;
258 return *i ? j : *i;
259 }
260 EOF
261 local flags
262 case $1 in
263 -s) flags="-S";;
264 -c) flags="-c";;
265 -l) ;;
266 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
267 esac
268 : ${flags:=-fPIC -shared -Wl,-z,defs}
269 [[ $1 == -* ]] && shift
270 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
271 local ret=$?
272 rm -f "${base}"*
273 return ${ret}
274}
275
276
89# Parse information from CBUILD/CHOST/CTARGET rather than 277# Parse information from CBUILD/CHOST/CTARGET rather than
90# use external variables from the profile. 278# use external variables from the profile.
91tc-ninja_magic_to_arch() { 279tc-ninja_magic_to_arch() {
92ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; } 280ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
93 281
94 local type=$1 282 local type=$1
95 local host=$2 283 local host=$2
96 [[ -z ${host} ]] && arg=${CHOST} 284 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
97 285
98 case ${host} in 286 case ${host} in
99 alpha*) echo alpha;; 287 alpha*) echo alpha;;
100 x86_64*) ninj x86_64 amd64;;
101 arm*) echo arm;; 288 arm*) echo arm;;
289 avr*) ninj avr32 avr;;
290 bfin*) ninj blackfin bfin;;
291 cris*) echo cris;;
102 hppa*) ninj parisc hppa;; 292 hppa*) ninj parisc hppa;;
293 i?86*)
294 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
295 # trees have been unified into 'x86'.
296 # FreeBSD still uses i386
297 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
298 echo i386
299 else
300 echo x86
301 fi
302 ;;
103 ia64*) echo ia64;; 303 ia64*) echo ia64;;
104 m68*) echo m68k;; 304 m68*) echo m68k;;
105 mips*) echo mips;; 305 mips*) echo mips;;
106 powerpc64*) echo ppc64;; 306 nios2*) echo nios2;;
107 powerpc*) echo ppc;; 307 nios*) echo nios;;
108 sparc64*) ninj sparc64 sparc;; 308 powerpc*)
109 sparc*) echo sparc;; 309 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
310 # have been unified into simply 'powerpc', but until 2.6.16,
311 # ppc32 is still using ARCH="ppc" as default
312 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
313 echo powerpc
314 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
315 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
316 echo powerpc
317 else
318 echo ppc
319 fi
320 elif [[ ${host} == powerpc64* ]] ; then
321 echo ppc64
322 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
323 ninj ppc64 ppc
324 else
325 echo ppc
326 fi
327 ;;
110 s390*) echo s390;; 328 s390*) echo s390;;
111 sh64*) ninj sh64 sh;; 329 sh64*) ninj sh64 sh;;
112 sh*) echo sh;; 330 sh*) echo sh;;
113 i?86*) ninj i386 x86;; 331 sparc64*) ninj sparc64 sparc;;
332 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
333 && ninj sparc64 sparc \
334 || echo sparc
335 ;;
336 vax*) echo vax;;
337 x86_64*freebsd*) echo amd64;;
338 x86_64*)
339 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
340 # trees have been unified into 'x86'.
341 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
342 echo x86
343 else
344 ninj x86_64 amd64
345 fi
346 ;;
347
348 # since our usage of tc-arch is largely concerned with
349 # normalizing inputs for testing ${CTARGET}, let's filter
350 # other cross targets (mingw and such) into the unknown.
351 *) echo unknown;;
352 esac
353}
354# @FUNCTION: tc-arch-kernel
355# @USAGE: [toolchain prefix]
356# @RETURN: name of the kernel arch according to the compiler target
357tc-arch-kernel() {
358 tc-ninja_magic_to_arch kern "$@"
359}
360# @FUNCTION: tc-arch
361# @USAGE: [toolchain prefix]
362# @RETURN: name of the portage arch according to the compiler target
363tc-arch() {
364 tc-ninja_magic_to_arch portage "$@"
365}
366
367tc-endian() {
368 local host=$1
369 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
370 host=${host%%-*}
371
372 case ${host} in
373 alpha*) echo big;;
374 arm*b*) echo big;;
375 arm*) echo little;;
376 cris*) echo little;;
377 hppa*) echo big;;
378 i?86*) echo little;;
379 ia64*) echo little;;
380 m68*) echo big;;
381 mips*l*) echo little;;
382 mips*) echo big;;
383 powerpc*) echo big;;
384 s390*) echo big;;
385 sh*b*) echo big;;
386 sh*) echo little;;
387 sparc*) echo big;;
388 x86_64*) echo little;;
114 *) echo wtf;; 389 *) echo wtf;;
115 esac 390 esac
116} 391}
117tc-arch-kernel() {
118 tc-ninja_magic_to_arch kern $@
119}
120tc-arch() {
121 tc-ninja_magic_to_arch portage $@
122}
123tc-endian() {
124 local host=$1
125 [[ -z ${host} ]] && host=${CHOST}
126 392
127 case ${host} in 393# Internal func. The first argument is the version info to expand.
128 alpha*) echo big;; 394# Query the preprocessor to improve compatibility across different
129 x86_64*) echo little;; 395# compilers rather than maintaining a --version flag matrix. #335943
130 arm*eb-*) echo big;; 396_gcc_fullversion() {
131 arm*) echo little;; 397 local ver="$1"; shift
132 hppa*) echo big;; 398 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
133 ia64*) echo little;; 399 eval echo "$ver"
134 m68*) echo big;;
135 mips*el-*) echo little;;
136 mips*) echo big;;
137 powerpc*) echo big;;
138 sparc*) echo big;;
139 s390*) echo big;;
140 sh*el-) echo little;;
141 sh*) echo big;;
142 i?86*) echo little;;
143 *) echo wtf;;
144 esac
145} 400}
146 401
147# Returns the version as by `$CC -dumpversion` 402# @FUNCTION: gcc-fullversion
403# @RETURN: compiler version (major.minor.micro: [3.4.6])
148gcc-fullversion() { 404gcc-fullversion() {
149 echo "$($(tc-getCC) -dumpversion)" 405 _gcc_fullversion '$1.$2.$3' "$@"
150} 406}
151# Returns the version, but only the <major>.<minor> 407# @FUNCTION: gcc-version
408# @RETURN: compiler version (major.minor: [3.4].6)
152gcc-version() { 409gcc-version() {
153 echo "$(gcc-fullversion | cut -f1,2 -d.)" 410 _gcc_fullversion '$1.$2' "$@"
154} 411}
155# Returns the Major version 412# @FUNCTION: gcc-major-version
413# @RETURN: major compiler version (major: [3].4.6)
156gcc-major-version() { 414gcc-major-version() {
157 echo "$(gcc-version | cut -f1 -d.)" 415 _gcc_fullversion '$1' "$@"
158} 416}
159# Returns the Minor version 417# @FUNCTION: gcc-minor-version
418# @RETURN: minor compiler version (minor: 3.[4].6)
160gcc-minor-version() { 419gcc-minor-version() {
161 echo "$(gcc-version | cut -f2 -d.)" 420 _gcc_fullversion '$2' "$@"
162} 421}
163# Returns the Micro version 422# @FUNCTION: gcc-micro-version
423# @RETURN: micro compiler version (micro: 3.4.[6])
164gcc-micro-version() { 424gcc-micro-version() {
165 echo "$(gcc-fullversion | cut -f3 -d.)" 425 _gcc_fullversion '$3' "$@"
166} 426}
427
428# Returns the installation directory - internal toolchain
429# function for use by _gcc-specs-exists (for flag-o-matic).
430_gcc-install-dir() {
431 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
432 awk '$1=="install:" {print $2}')"
433}
434# Returns true if the indicated specs file exists - internal toolchain
435# function for use by flag-o-matic.
436_gcc-specs-exists() {
437 [[ -f $(_gcc-install-dir)/$1 ]]
438}
439
440# Returns requested gcc specs directive unprocessed - for used by
441# gcc-specs-directive()
442# Note; later specs normally overwrite earlier ones; however if a later
443# spec starts with '+' then it appends.
444# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
445# as "Reading <file>", in order. Strictly speaking, if there's a
446# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
447# the same token anything from 'gcc -dumpspecs' is overridden by
448# the contents of $(gcc_install_dir)/specs so the result is the
449# same either way.
450_gcc-specs-directive_raw() {
451 local cc=$(tc-getCC)
452 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
453 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
454'BEGIN { pspec=""; spec=""; outside=1 }
455$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
456 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
457 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
458 { spec=spec $0 }
459END { print spec }'
460 return 0
461}
462
463# Return the requested gcc specs directive, with all included
464# specs expanded.
465# Note, it does not check for inclusion loops, which cause it
466# to never finish - but such loops are invalid for gcc and we're
467# assuming gcc is operational.
468gcc-specs-directive() {
469 local directive subdname subdirective
470 directive="$(_gcc-specs-directive_raw $1)"
471 while [[ ${directive} == *%\(*\)* ]]; do
472 subdname=${directive/*%\(}
473 subdname=${subdname/\)*}
474 subdirective="$(_gcc-specs-directive_raw ${subdname})"
475 directive="${directive//\%(${subdname})/${subdirective}}"
476 done
477 echo "${directive}"
478 return 0
479}
480
481# Returns true if gcc sets relro
482gcc-specs-relro() {
483 local directive
484 directive=$(gcc-specs-directive link_command)
485 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
486}
487# Returns true if gcc sets now
488gcc-specs-now() {
489 local directive
490 directive=$(gcc-specs-directive link_command)
491 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
492}
493# Returns true if gcc builds PIEs
494gcc-specs-pie() {
495 local directive
496 directive=$(gcc-specs-directive cc1)
497 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
498}
499# Returns true if gcc builds with the stack protector
500gcc-specs-ssp() {
501 local directive
502 directive=$(gcc-specs-directive cc1)
503 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
504}
505# Returns true if gcc upgrades fstack-protector to fstack-protector-all
506gcc-specs-ssp-to-all() {
507 local directive
508 directive=$(gcc-specs-directive cc1)
509 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
510}
511# Returns true if gcc builds with fno-strict-overflow
512gcc-specs-nostrict() {
513 local directive
514 directive=$(gcc-specs-directive cc1)
515 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
516}
517
518
519# @FUNCTION: gen_usr_ldscript
520# @USAGE: [-a] <list of libs to create linker scripts for>
521# @DESCRIPTION:
522# This function generate linker scripts in /usr/lib for dynamic
523# libs in /lib. This is to fix linking problems when you have
524# the .so in /lib, and the .a in /usr/lib. What happens is that
525# in some cases when linking dynamic, the .a in /usr/lib is used
526# instead of the .so in /lib due to gcc/libtool tweaking ld's
527# library search path. This causes many builds to fail.
528# See bug #4411 for more info.
529#
530# Note that you should in general use the unversioned name of
531# the library (libfoo.so), as ldconfig should usually update it
532# correctly to point to the latest version of the library present.
533gen_usr_ldscript() {
534 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
535 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
536
537 tc-is-static-only && return
538
539 # Just make sure it exists
540 dodir /usr/${libdir}
541
542 if [[ $1 == "-a" ]] ; then
543 auto=true
544 shift
545 dodir /${libdir}
546 fi
547
548 # OUTPUT_FORMAT gives hints to the linker as to what binary format
549 # is referenced ... makes multilib saner
550 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
551 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
552
553 for lib in "$@" ; do
554 local tlib
555 if ${auto} ; then
556 lib="lib${lib}${suffix}"
557 else
558 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
559 # This especially is for AIX where $(get_libname) can return ".a",
560 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
561 [[ -r ${ED}/${libdir}/${lib} ]] || continue
562 #TODO: better die here?
563 fi
564
565 case ${CTARGET:-${CHOST}} in
566 *-darwin*)
567 if ${auto} ; then
568 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
569 else
570 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
571 fi
572 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
573 tlib=${tlib##*/}
574
575 if ${auto} ; then
576 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
577 # some install_names are funky: they encode a version
578 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
579 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
580 fi
581 rm -f "${ED}"/${libdir}/${lib}
582 fi
583
584 # Mach-O files have an id, which is like a soname, it tells how
585 # another object linking against this lib should reference it.
586 # Since we moved the lib from usr/lib into lib this reference is
587 # wrong. Hence, we update it here. We don't configure with
588 # libdir=/lib because that messes up libtool files.
589 # Make sure we don't lose the specific version, so just modify the
590 # existing install_name
591 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
592 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
593 local nowrite=yes
594 fi
595 install_name_tool \
596 -id "${EPREFIX}"/${libdir}/${tlib} \
597 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
598 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
599 # Now as we don't use GNU binutils and our linker doesn't
600 # understand linker scripts, just create a symlink.
601 pushd "${ED}/usr/${libdir}" > /dev/null
602 ln -snf "../../${libdir}/${tlib}" "${lib}"
603 popd > /dev/null
604 ;;
605 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
606 if ${auto} ; then
607 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
608 # no way to retrieve soname on these platforms (?)
609 tlib=$(readlink "${ED}"/${libdir}/${lib})
610 tlib=${tlib##*/}
611 if [[ -z ${tlib} ]] ; then
612 # ok, apparently was not a symlink, don't remove it and
613 # just link to it
614 tlib=${lib}
615 else
616 rm -f "${ED}"/${libdir}/${lib}
617 fi
618 else
619 tlib=${lib}
620 fi
621
622 # we don't have GNU binutils on these platforms, so we symlink
623 # instead, which seems to work fine. Keep it relative, otherwise
624 # we break some QA checks in Portage
625 # on interix, the linker scripts would work fine in _most_
626 # situations. if a library links to such a linker script the
627 # absolute path to the correct library is inserted into the binary,
628 # which is wrong, since anybody linking _without_ libtool will miss
629 # some dependencies, since the stupid linker cannot find libraries
630 # hardcoded with absolute paths (as opposed to the loader, which
631 # seems to be able to do this).
632 # this has been seen while building shared-mime-info which needs
633 # libxml2, but links without libtool (and does not add libz to the
634 # command line by itself).
635 pushd "${ED}/usr/${libdir}" > /dev/null
636 ln -snf "../../${libdir}/${tlib}" "${lib}"
637 popd > /dev/null
638 ;;
639 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
640 if ${auto} ; then
641 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
642 [[ -z ${tlib} ]] && tlib=${lib}
643 tlib=${tlib##*/} # 'internal name' can have a path component
644 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
645 # some SONAMEs are funky: they encode a version before the .so
646 if [[ ${tlib} != ${lib}* ]] ; then
647 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
648 fi
649 [[ ${tlib} != ${lib} ]] &&
650 rm -f "${ED}"/${libdir}/${lib}
651 else
652 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
653 [[ -z ${tlib} ]] && tlib=${lib}
654 tlib=${tlib##*/} # 'internal name' can have a path component
655 fi
656 pushd "${ED}"/usr/${libdir} >/dev/null
657 ln -snf "../../${libdir}/${tlib}" "${lib}"
658 # need the internal name in usr/lib too, to be available at runtime
659 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
660 [[ ${tlib} != ${lib} ]] &&
661 ln -snf "../../${libdir}/${tlib}" "${tlib}"
662 popd >/dev/null
663 ;;
664 *)
665 if ${auto} ; then
666 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
667 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
668 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
669 # some SONAMEs are funky: they encode a version before the .so
670 if [[ ${tlib} != ${lib}* ]] ; then
671 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
672 fi
673 rm -f "${ED}"/${libdir}/${lib}
674 else
675 tlib=${lib}
676 fi
677 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
678 /* GNU ld script
679 Since Gentoo has critical dynamic libraries in /lib, and the static versions
680 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
681 run into linking problems. This "fake" dynamic lib is a linker script that
682 redirects the linker to the real lib. And yes, this works in the cross-
683 compiling scenario as the sysroot-ed linker will prepend the real path.
684
685 See bug http://bugs.gentoo.org/4411 for more info.
686 */
687 ${output_format}
688 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
689 END_LDSCRIPT
690 ;;
691 esac
692 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
693 done
694}

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