/[gentoo-x86]/eclass/toolchain-funcs.eclass
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Revision 1.28 Revision 1.104
1# Copyright 1999-2005 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 1.28 2005/01/24 04:32:55 vapier Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/toolchain-funcs.eclass,v 1.104 2011/07/12 14:29:41 aballier 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
15tc-getPROG() { 21tc-getPROG() {
16 local var=$1 22 local var=$1
… …
19 if [[ -n ${!var} ]] ; then 25 if [[ -n ${!var} ]] ; then
20 echo "${!var}" 26 echo "${!var}"
21 return 0 27 return 0
22 fi 28 fi
23 29
24 if [[ -n ${CHOST} ]] ; then 30 local search=
25 local search=$(type -p "${CHOST}-${prog}") 31 [[ -n $3 ]] && search=$(type -p "$3-${prog}")
32 [[ -z ${search} && -n ${CHOST} ]] && search=$(type -p "${CHOST}-${prog}")
26 [[ -n ${search} ]] && prog=${search##*/} 33 [[ -n ${search} ]] && prog=${search##*/}
27 fi
28 34
29 export ${var}=${prog} 35 export ${var}=${prog}
30 echo "${!var}" 36 echo "${!var}"
31} 37}
32 38
33# Returns the name of the archiver 39# @FUNCTION: tc-getAR
40# @USAGE: [toolchain prefix]
41# @RETURN: name of the archiver
34tc-getAR() { tc-getPROG AR ar; } 42tc-getAR() { tc-getPROG AR ar "$@"; }
35# Returns the name of the assembler 43# @FUNCTION: tc-getAS
44# @USAGE: [toolchain prefix]
45# @RETURN: name of the assembler
36tc-getAS() { tc-getPROG AS as; } 46tc-getAS() { tc-getPROG AS as "$@"; }
47# @FUNCTION: tc-getCC
48# @USAGE: [toolchain prefix]
37# Returns the name of the C compiler 49# @RETURN: name of the C compiler
38tc-getCC() { tc-getPROG CC gcc; } 50tc-getCC() { tc-getPROG CC gcc "$@"; }
51# @FUNCTION: tc-getCPP
52# @USAGE: [toolchain prefix]
53# @RETURN: name of the C preprocessor
54tc-getCPP() { tc-getPROG CPP cpp "$@"; }
55# @FUNCTION: tc-getCXX
56# @USAGE: [toolchain prefix]
39# Returns the name of the C++ compiler 57# @RETURN: name of the C++ compiler
40tc-getCXX() { tc-getPROG CXX g++; } 58tc-getCXX() { tc-getPROG CXX g++ "$@"; }
41# Returns the name of the linker 59# @FUNCTION: tc-getLD
60# @USAGE: [toolchain prefix]
61# @RETURN: name of the linker
42tc-getLD() { tc-getPROG LD ld; } 62tc-getLD() { tc-getPROG LD ld "$@"; }
63# @FUNCTION: tc-getSTRIP
64# @USAGE: [toolchain prefix]
65# @RETURN: name of the strip program
66tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
67# @FUNCTION: tc-getNM
68# @USAGE: [toolchain prefix]
43# Returns the name of the symbol/object thingy 69# @RETURN: name of the symbol/object thingy
44tc-getNM() { tc-getPROG NM nm; } 70tc-getNM() { tc-getPROG NM nm "$@"; }
71# @FUNCTION: tc-getRANLIB
72# @USAGE: [toolchain prefix]
45# Returns the name of the archiver indexer 73# @RETURN: name of the archiver indexer
46tc-getRANLIB() { tc-getPROG RANLIB ranlib; } 74tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
47# Returns the name of the fortran compiler 75# @FUNCTION: tc-getOBJCOPY
76# @USAGE: [toolchain prefix]
77# @RETURN: name of the object copier
78tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
79# @FUNCTION: tc-getF77
80# @USAGE: [toolchain prefix]
81# @RETURN: name of the Fortran 77 compiler
48tc-getF77() { tc-getPROG F77 f77; } 82tc-getF77() { tc-getPROG F77 gfortran "$@"; }
83# @FUNCTION: tc-getFC
84# @USAGE: [toolchain prefix]
85# @RETURN: name of the Fortran 90 compiler
86tc-getFC() { tc-getPROG FC gfortran "$@"; }
87# @FUNCTION: tc-getGCJ
88# @USAGE: [toolchain prefix]
49# Returns the name of the java compiler 89# @RETURN: name of the java compiler
50tc-getGCJ() { tc-getPROG GCJ gcj; } 90tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
91# @FUNCTION: tc-getPKG_CONFIG
92# @USAGE: [toolchain prefix]
93# @RETURN: name of the pkg-config tool
94tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
95# @FUNCTION: tc-getRC
96# @USAGE: [toolchain prefix]
97# @RETURN: name of the Windows resource compiler
98tc-getRC() { tc-getPROG RC windres "$@"; }
99# @FUNCTION: tc-getDLLWRAP
100# @USAGE: [toolchain prefix]
101# @RETURN: name of the Windows dllwrap utility
102tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
51 103
52# Returns the name of the C compiler for build 104# @FUNCTION: tc-getBUILD_CC
105# @USAGE: [toolchain prefix]
106# @RETURN: name of the C compiler for building binaries to run on the build machine
53tc-getBUILD_CC() { 107tc-getBUILD_CC() {
108 local v
109 for v in CC_FOR_BUILD BUILD_CC HOSTCC ; do
54 if [[ -n ${CC_FOR_BUILD} ]] ; then 110 if [[ -n ${!v} ]] ; then
55 export BUILD_CC=${CC_FOR_BUILD} 111 export BUILD_CC=${!v}
56 echo "${CC_FOR_BUILD}" 112 echo "${!v}"
57 return 0 113 return 0
58 fi 114 fi
115 done
59 116
60 local search= 117 local search=
61 if [[ -n ${CBUILD} ]] ; then 118 if [[ -n ${CBUILD} ]] ; then
62 search=$(type -p ${CBUILD}-gcc) 119 search=$(type -p ${CBUILD}-gcc)
63 search=${search##*/} 120 search=${search##*/}
64 else
65 search=gcc
66 fi 121 fi
122 search=${search:-gcc}
67 123
68 export BUILD_CC=${search} 124 export BUILD_CC=${search}
69 echo "${search}" 125 echo "${search}"
70} 126}
71 127
128# @FUNCTION: tc-export
129# @USAGE: <list of toolchain variables>
130# @DESCRIPTION:
72# Quick way to export a bunch of vars at once 131# Quick way to export a bunch of compiler vars at once.
73tc-export() { 132tc-export() {
74 local var 133 local var
75 for var in "$@" ; do 134 for var in "$@" ; do
135 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
76 eval tc-get${var} 136 eval tc-get${var} > /dev/null
77 done 137 done
78} 138}
79 139
80# A simple way to see if we're using a cross-compiler ... 140# @FUNCTION: tc-is-cross-compiler
141# @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
81tc-is-cross-compiler() { 142tc-is-cross-compiler() {
82 if [[ -n ${CBUILD} ]] ; then
83 return $([[ ${CBUILD} != ${CHOST} ]]) 143 return $([[ ${CBUILD:-${CHOST}} != ${CHOST} ]])
84 fi
85 return 1
86} 144}
87 145
146# @FUNCTION: tc-is-softfloat
147# @DESCRIPTION:
148# See if this toolchain is a softfloat based one.
149# @CODE
150# The possible return values:
151# - only: the target is always softfloat (never had fpu)
152# - yes: the target should support softfloat
153# - no: the target doesn't support softfloat
154# @CODE
155# This allows us to react differently where packages accept
156# softfloat flags in the case where support is optional, but
157# rejects softfloat flags where the target always lacks an fpu.
158tc-is-softfloat() {
159 case ${CTARGET} in
160 bfin*|h8300*)
161 echo "only" ;;
162 *)
163 [[ ${CTARGET//_/-} == *-softfloat-* ]] \
164 && echo "yes" \
165 || echo "no"
166 ;;
167 esac
168}
88 169
170# @FUNCTION: tc-is-hardfloat
171# @DESCRIPTION:
172# See if this toolchain is a hardfloat based one.
173# @CODE
174# The possible return values:
175# - yes: the target should support hardfloat
176# - no: the target doesn't support hardfloat
177tc-is-hardfloat() {
178 [[ ${CTARGET//_/-} == *-hardfloat-* ]] \
179 && echo "yes" \
180 || echo "no"
181}
182
183# @FUNCTION: tc-is-static-only
184# @DESCRIPTION:
185# Return shell true if the target does not support shared libs, shell false
186# otherwise.
187tc-is-static-only() {
188 local host=${CTARGET:-${CHOST}}
189
190 # *MiNT doesn't have shared libraries, only platform so far
191 return $([[ ${host} == *-mint* ]])
192}
193
194# @FUNCTION: tc-has-openmp
195# @USAGE: [toolchain prefix]
196# @DESCRIPTION:
197# See if the toolchain supports OpenMP.
198tc-has-openmp() {
199 local base="${T}/test-tc-openmp"
200 cat <<-EOF > "${base}.c"
201 #include <omp.h>
202 int main() {
203 int nthreads, tid, ret = 0;
204 #pragma omp parallel private(nthreads, tid)
205 {
206 tid = omp_get_thread_num();
207 nthreads = omp_get_num_threads(); ret += tid + nthreads;
208 }
209 return ret;
210 }
211 EOF
212 $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
213 local ret=$?
214 rm -f "${base}"*
215 return ${ret}
216}
217
218# @FUNCTION: tc-has-tls
219# @USAGE: [-s|-c|-l] [toolchain prefix]
220# @DESCRIPTION:
221# See if the toolchain supports thread local storage (TLS). Use -s to test the
222# compiler, -c to also test the assembler, and -l to also test the C library
223# (the default).
224tc-has-tls() {
225 local base="${T}/test-tc-tls"
226 cat <<-EOF > "${base}.c"
227 int foo(int *i) {
228 static __thread int j = 0;
229 return *i ? j : *i;
230 }
231 EOF
232 local flags
233 case $1 in
234 -s) flags="-S";;
235 -c) flags="-c";;
236 -l) ;;
237 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
238 esac
239 : ${flags:=-fPIC -shared -Wl,-z,defs}
240 [[ $1 == -* ]] && shift
241 $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
242 local ret=$?
243 rm -f "${base}"*
244 return ${ret}
245}
246
247
89# Parse information from CBUILD/CHOST/CTARGET rather than 248# Parse information from CBUILD/CHOST/CTARGET rather than
90# use external variables from the profile. 249# use external variables from the profile.
91tc-ninja_magic_to_arch() { 250tc-ninja_magic_to_arch() {
92ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; } 251ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
93 252
94 local type=$1 253 local type=$1
95 local host=$2 254 local host=$2
96 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}} 255 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
97 256
98 case ${host} in 257 case ${host} in
99 alpha*) echo alpha;; 258 alpha*) echo alpha;;
100 x86_64*) ninj x86_64 amd64;;
101 arm*) echo arm;; 259 arm*) echo arm;;
260 avr*) ninj avr32 avr;;
261 bfin*) ninj blackfin bfin;;
262 cris*) echo cris;;
102 hppa*) ninj parisc hppa;; 263 hppa*) ninj parisc hppa;;
264 i?86*)
265 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
266 # trees have been unified into 'x86'.
267 # FreeBSD still uses i386
268 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
269 echo i386
270 else
271 echo x86
272 fi
273 ;;
103 ia64*) echo ia64;; 274 ia64*) echo ia64;;
104 m68*) echo m68k;; 275 m68*) echo m68k;;
105 mips*) echo mips;; 276 mips*) echo mips;;
106 powerpc64*) echo ppc64;; 277 nios2*) echo nios2;;
107 powerpc*) echo ppc;; 278 nios*) echo nios;;
279 powerpc*)
280 # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
281 # have been unified into simply 'powerpc', but until 2.6.16,
282 # ppc32 is still using ARCH="ppc" as default
283 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
284 echo powerpc
285 elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
286 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
287 echo powerpc
288 else
289 echo ppc
290 fi
291 elif [[ ${host} == powerpc64* ]] ; then
292 echo ppc64
293 elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
294 ninj ppc64 ppc
295 else
296 echo ppc
297 fi
298 ;;
299 s390*) echo s390;;
300 sh64*) ninj sh64 sh;;
301 sh*) echo sh;;
108 sparc64*) ninj sparc64 sparc;; 302 sparc64*) ninj sparc64 sparc;;
109 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \ 303 sparc*) [[ ${PROFILE_ARCH} == "sparc64" ]] \
110 && ninj sparc64 sparc \ 304 && ninj sparc64 sparc \
111 || echo sparc 305 || echo sparc
112 ;; 306 ;;
113 s390*) echo s390;; 307 vax*) echo vax;;
114 sh64*) ninj sh64 sh;; 308 x86_64*freebsd*) echo amd64;;
115 sh*) echo sh;; 309 x86_64*)
116 i?86*) ninj i386 x86;; 310 # Starting with linux-2.6.24, the 'x86_64' and 'i386'
117 *) echo ${ARCH};; 311 # trees have been unified into 'x86'.
312 if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
313 echo x86
314 else
315 ninj x86_64 amd64
316 fi
317 ;;
318
319 # since our usage of tc-arch is largely concerned with
320 # normalizing inputs for testing ${CTARGET}, let's filter
321 # other cross targets (mingw and such) into the unknown.
322 *) echo unknown;;
118 esac 323 esac
119} 324}
325# @FUNCTION: tc-arch-kernel
326# @USAGE: [toolchain prefix]
327# @RETURN: name of the kernel arch according to the compiler target
120tc-arch-kernel() { 328tc-arch-kernel() {
121 tc-ninja_magic_to_arch kern $@ 329 tc-ninja_magic_to_arch kern "$@"
122} 330}
331# @FUNCTION: tc-arch
332# @USAGE: [toolchain prefix]
333# @RETURN: name of the portage arch according to the compiler target
123tc-arch() { 334tc-arch() {
124 tc-ninja_magic_to_arch portage $@ 335 tc-ninja_magic_to_arch portage "$@"
125} 336}
337
126tc-endian() { 338tc-endian() {
127 local host=$1 339 local host=$1
128 [[ -z ${host} ]] && host=${CHOST} 340 [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
341 host=${host%%-*}
129 342
130 case ${host} in 343 case ${host} in
131 alpha*) echo big;; 344 alpha*) echo big;;
132 x86_64*) echo little;;
133 arm*eb-*) echo big;; 345 arm*b*) echo big;;
134 arm*) echo little;; 346 arm*) echo little;;
347 cris*) echo little;;
135 hppa*) echo big;; 348 hppa*) echo big;;
349 i?86*) echo little;;
136 ia64*) echo little;; 350 ia64*) echo little;;
137 m68*) echo big;; 351 m68*) echo big;;
138 mips*el-*) echo little;; 352 mips*l*) echo little;;
139 mips*) echo big;; 353 mips*) echo big;;
140 powerpc*) echo big;; 354 powerpc*) echo big;;
355 s390*) echo big;;
356 sh*b*) echo big;;
357 sh*) echo little;;
141 sparc*) echo big;; 358 sparc*) echo big;;
142 s390*) echo big;;
143 sh*el-) echo little;;
144 sh*) echo big;;
145 i?86*) echo little;; 359 x86_64*) echo little;;
146 *) echo wtf;; 360 *) echo wtf;;
147 esac 361 esac
148} 362}
149 363
150# Returns the version as by `$CC -dumpversion` 364# Internal func. The first argument is the version info to expand.
365# Query the preprocessor to improve compatibility across different
366# compilers rather than maintaining a --version flag matrix. #335943
367_gcc_fullversion() {
368 local ver="$1"; shift
369 set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
370 eval echo "$ver"
371}
372
373# @FUNCTION: gcc-fullversion
374# @RETURN: compiler version (major.minor.micro: [3.4.6])
151gcc-fullversion() { 375gcc-fullversion() {
152 echo "$($(tc-getCC) -dumpversion)" 376 _gcc_fullversion '$1.$2.$3' "$@"
153} 377}
154# Returns the version, but only the <major>.<minor> 378# @FUNCTION: gcc-version
379# @RETURN: compiler version (major.minor: [3.4].6)
155gcc-version() { 380gcc-version() {
156 echo "$(gcc-fullversion | cut -f1,2 -d.)" 381 _gcc_fullversion '$1.$2' "$@"
157} 382}
158# Returns the Major version 383# @FUNCTION: gcc-major-version
384# @RETURN: major compiler version (major: [3].4.6)
159gcc-major-version() { 385gcc-major-version() {
160 echo "$(gcc-version | cut -f1 -d.)" 386 _gcc_fullversion '$1' "$@"
161} 387}
162# Returns the Minor version 388# @FUNCTION: gcc-minor-version
389# @RETURN: minor compiler version (minor: 3.[4].6)
163gcc-minor-version() { 390gcc-minor-version() {
164 echo "$(gcc-version | cut -f2 -d.)" 391 _gcc_fullversion '$2' "$@"
165} 392}
166# Returns the Micro version 393# @FUNCTION: gcc-micro-version
394# @RETURN: micro compiler version (micro: 3.4.[6])
167gcc-micro-version() { 395gcc-micro-version() {
168 echo "$(gcc-fullversion | cut -f3 -d.)" 396 _gcc_fullversion '$3' "$@"
169} 397}
398
399# Returns the installation directory - internal toolchain
400# function for use by _gcc-specs-exists (for flag-o-matic).
401_gcc-install-dir() {
402 echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
403 awk '$1=="install:" {print $2}')"
404}
405# Returns true if the indicated specs file exists - internal toolchain
406# function for use by flag-o-matic.
407_gcc-specs-exists() {
408 [[ -f $(_gcc-install-dir)/$1 ]]
409}
410
411# Returns requested gcc specs directive unprocessed - for used by
412# gcc-specs-directive()
413# Note; later specs normally overwrite earlier ones; however if a later
414# spec starts with '+' then it appends.
415# gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
416# as "Reading <file>", in order. Strictly speaking, if there's a
417# $(gcc_install_dir)/specs, the built-in specs aren't read, however by
418# the same token anything from 'gcc -dumpspecs' is overridden by
419# the contents of $(gcc_install_dir)/specs so the result is the
420# same either way.
421_gcc-specs-directive_raw() {
422 local cc=$(tc-getCC)
423 local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
424 ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
425'BEGIN { pspec=""; spec=""; outside=1 }
426$1=="*"directive":" { pspec=spec; spec=""; outside=0; next }
427 outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
428 spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
429 { spec=spec $0 }
430END { print spec }'
431 return 0
432}
433
434# Return the requested gcc specs directive, with all included
435# specs expanded.
436# Note, it does not check for inclusion loops, which cause it
437# to never finish - but such loops are invalid for gcc and we're
438# assuming gcc is operational.
439gcc-specs-directive() {
440 local directive subdname subdirective
441 directive="$(_gcc-specs-directive_raw $1)"
442 while [[ ${directive} == *%\(*\)* ]]; do
443 subdname=${directive/*%\(}
444 subdname=${subdname/\)*}
445 subdirective="$(_gcc-specs-directive_raw ${subdname})"
446 directive="${directive//\%(${subdname})/${subdirective}}"
447 done
448 echo "${directive}"
449 return 0
450}
451
452# Returns true if gcc sets relro
453gcc-specs-relro() {
454 local directive
455 directive=$(gcc-specs-directive link_command)
456 return $([[ "${directive/\{!norelro:}" != "${directive}" ]])
457}
458# Returns true if gcc sets now
459gcc-specs-now() {
460 local directive
461 directive=$(gcc-specs-directive link_command)
462 return $([[ "${directive/\{!nonow:}" != "${directive}" ]])
463}
464# Returns true if gcc builds PIEs
465gcc-specs-pie() {
466 local directive
467 directive=$(gcc-specs-directive cc1)
468 return $([[ "${directive/\{!nopie:}" != "${directive}" ]])
469}
470# Returns true if gcc builds with the stack protector
471gcc-specs-ssp() {
472 local directive
473 directive=$(gcc-specs-directive cc1)
474 return $([[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]])
475}
476# Returns true if gcc upgrades fstack-protector to fstack-protector-all
477gcc-specs-ssp-to-all() {
478 local directive
479 directive=$(gcc-specs-directive cc1)
480 return $([[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]])
481}
482# Returns true if gcc builds with fno-strict-overflow
483gcc-specs-nostrict() {
484 local directive
485 directive=$(gcc-specs-directive cc1)
486 return $([[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]])
487}
488
489
490# @FUNCTION: gen_usr_ldscript
491# @USAGE: [-a] <list of libs to create linker scripts for>
492# @DESCRIPTION:
493# This function generate linker scripts in /usr/lib for dynamic
494# libs in /lib. This is to fix linking problems when you have
495# the .so in /lib, and the .a in /usr/lib. What happens is that
496# in some cases when linking dynamic, the .a in /usr/lib is used
497# instead of the .so in /lib due to gcc/libtool tweaking ld's
498# library search path. This causes many builds to fail.
499# See bug #4411 for more info.
500#
501# Note that you should in general use the unversioned name of
502# the library (libfoo.so), as ldconfig should usually update it
503# correctly to point to the latest version of the library present.
504gen_usr_ldscript() {
505 local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
506 [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
507
508 tc-is-static-only && return
509
510 # Just make sure it exists
511 dodir /usr/${libdir}
512
513 if [[ $1 == "-a" ]] ; then
514 auto=true
515 shift
516 dodir /${libdir}
517 fi
518
519 # OUTPUT_FORMAT gives hints to the linker as to what binary format
520 # is referenced ... makes multilib saner
521 output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
522 [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
523
524 for lib in "$@" ; do
525 local tlib
526 if ${auto} ; then
527 lib="lib${lib}${suffix}"
528 else
529 # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
530 # This especially is for AIX where $(get_libname) can return ".a",
531 # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
532 [[ -r ${ED}/${libdir}/${lib} ]] || continue
533 #TODO: better die here?
534 fi
535
536 case ${CTARGET:-${CHOST}} in
537 *-darwin*)
538 if ${auto} ; then
539 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
540 else
541 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
542 fi
543 [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
544 tlib=${tlib##*/}
545
546 if ${auto} ; then
547 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
548 # some install_names are funky: they encode a version
549 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
550 mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
551 fi
552 rm -f "${ED}"/${libdir}/${lib}
553 fi
554
555 # Mach-O files have an id, which is like a soname, it tells how
556 # another object linking against this lib should reference it.
557 # Since we moved the lib from usr/lib into lib this reference is
558 # wrong. Hence, we update it here. We don't configure with
559 # libdir=/lib because that messes up libtool files.
560 # Make sure we don't lose the specific version, so just modify the
561 # existing install_name
562 if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
563 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
564 local nowrite=yes
565 fi
566 install_name_tool \
567 -id "${EPREFIX}"/${libdir}/${tlib} \
568 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
569 [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
570 # Now as we don't use GNU binutils and our linker doesn't
571 # understand linker scripts, just create a symlink.
572 pushd "${ED}/usr/${libdir}" > /dev/null
573 ln -snf "../../${libdir}/${tlib}" "${lib}"
574 popd > /dev/null
575 ;;
576 *-aix*|*-irix*|*64*-hpux*|*-interix*|*-winnt*)
577 if ${auto} ; then
578 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
579 # no way to retrieve soname on these platforms (?)
580 tlib=$(readlink "${ED}"/${libdir}/${lib})
581 tlib=${tlib##*/}
582 if [[ -z ${tlib} ]] ; then
583 # ok, apparently was not a symlink, don't remove it and
584 # just link to it
585 tlib=${lib}
586 else
587 rm -f "${ED}"/${libdir}/${lib}
588 fi
589 else
590 tlib=${lib}
591 fi
592
593 # we don't have GNU binutils on these platforms, so we symlink
594 # instead, which seems to work fine. Keep it relative, otherwise
595 # we break some QA checks in Portage
596 # on interix, the linker scripts would work fine in _most_
597 # situations. if a library links to such a linker script the
598 # absolute path to the correct library is inserted into the binary,
599 # which is wrong, since anybody linking _without_ libtool will miss
600 # some dependencies, since the stupid linker cannot find libraries
601 # hardcoded with absolute paths (as opposed to the loader, which
602 # seems to be able to do this).
603 # this has been seen while building shared-mime-info which needs
604 # libxml2, but links without libtool (and does not add libz to the
605 # command line by itself).
606 pushd "${ED}/usr/${libdir}" > /dev/null
607 ln -snf "../../${libdir}/${tlib}" "${lib}"
608 popd > /dev/null
609 ;;
610 hppa*-hpux*) # PA-RISC 32bit (SOM) only, others (ELF) match *64*-hpux* above.
611 if ${auto} ; then
612 tlib=$(chatr "${ED}"/usr/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
613 [[ -z ${tlib} ]] && tlib=${lib}
614 tlib=${tlib##*/} # 'internal name' can have a path component
615 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
616 # some SONAMEs are funky: they encode a version before the .so
617 if [[ ${tlib} != ${lib}* ]] ; then
618 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
619 fi
620 [[ ${tlib} != ${lib} ]] &&
621 rm -f "${ED}"/${libdir}/${lib}
622 else
623 tlib=$(chatr "${ED}"/${libdir}/${lib} | sed -n '/internal name:/{n;s/^ *//;p;q}')
624 [[ -z ${tlib} ]] && tlib=${lib}
625 tlib=${tlib##*/} # 'internal name' can have a path component
626 fi
627 pushd "${ED}"/usr/${libdir} >/dev/null
628 ln -snf "../../${libdir}/${tlib}" "${lib}"
629 # need the internal name in usr/lib too, to be available at runtime
630 # when linked with /path/to/lib.sl (hardcode_direct_absolute=yes)
631 [[ ${tlib} != ${lib} ]] &&
632 ln -snf "../../${libdir}/${tlib}" "${tlib}"
633 popd >/dev/null
634 ;;
635 *)
636 if ${auto} ; then
637 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
638 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
639 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
640 # some SONAMEs are funky: they encode a version before the .so
641 if [[ ${tlib} != ${lib}* ]] ; then
642 mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
643 fi
644 rm -f "${ED}"/${libdir}/${lib}
645 else
646 tlib=${lib}
647 fi
648 cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
649 /* GNU ld script
650 Since Gentoo has critical dynamic libraries in /lib, and the static versions
651 in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
652 run into linking problems. This "fake" dynamic lib is a linker script that
653 redirects the linker to the real lib. And yes, this works in the cross-
654 compiling scenario as the sysroot-ed linker will prepend the real path.
655
656 See bug http://bugs.gentoo.org/4411 for more info.
657 */
658 ${output_format}
659 GROUP ( ${EPREFIX}/${libdir}/${tlib} )
660 END_LDSCRIPT
661 ;;
662 esac
663 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
664 done
665}
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