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re PR libgomp/38086 (libgomp fails to build if assembler doesn't support .symver)

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PR libgomp/38086
	* acinclude.m4 (HAVE_AS_SYMVER_DIRECTIVE): New check.
	* libgomp.h (LIBGOMP_GNU_SYMBOL_VERSIONING): Undefine if
	HAVE_AS_SYMVER_DIRECTIVE is not defined.
	* configure: Regenerated.
	* config.h.in: Likewise.

From-SVN: r143168
This commit is contained in:
Jakub Jelinek 2009-01-07 23:48:03 +01:00 committed by Jakub Jelinek
parent c0f645750c
commit 876080ffb7
5 changed files with 86 additions and 1 deletions
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9
libgomp/ChangeLog
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@ -1,3 +1,12 @@
2009-01-07 Jakub Jelinek <jakub@redhat.com>
PR libgomp/38086
* acinclude.m4 (HAVE_AS_SYMVER_DIRECTIVE): New check.
* libgomp.h (LIBGOMP_GNU_SYMBOL_VERSIONING): Undefine if
HAVE_AS_SYMVER_DIRECTIVE is not defined.
* configure: Regenerated.
* config.h.in: Likewise.
2008-12-28 Jakub Jelinek <jakub@redhat.com>
PR c++/38650

10
libgomp/acinclude.m4
View File

@ -298,6 +298,16 @@ if test $enable_symvers = yes; then
fi
fi
AC_CACHE_CHECK([whether the target supports .symver directive],
libgomp_cv_have_as_symver_directive, [
AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
[], libgomp_cv_have_as_symver_directive=yes,
libgomp_cv_have_as_symver_directive=no)])
if test $libgomp_cv_have_as_symver_directive = yes; then
AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
[Define to 1 if the target assembler supports .symver directive.])
fi
AM_CONDITIONAL(LIBGOMP_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
])

3
libgomp/config.h.in
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@ -1,5 +1,8 @@
/* config.h.in. Generated from configure.ac by autoheader. */
/* Define to 1 if the target assembler supports .symver directive. */
#undef HAVE_AS_SYMVER_DIRECTIVE
/* Define to 1 if the target supports __attribute__((alias(...))). */
#undef HAVE_ATTRIBUTE_ALIAS

62
libgomp/configure vendored
View File

@ -18761,6 +18761,68 @@ echo "$as_me: WARNING: === Symbol versioning will be disabled." >&2;}
fi
fi
echo "$as_me:$LINENO: checking whether the target supports .symver directive" >&5
echo $ECHO_N "checking whether the target supports .symver directive... $ECHO_C" >&6
if test "${libgomp_cv_have_as_symver_directive+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
void foo (void); __asm (".symver foo, bar@SYMVER");
int
main ()
{
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext
if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
(eval $ac_compile) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest.$ac_objext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
libgomp_cv_have_as_symver_directive=yes
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
libgomp_cv_have_as_symver_directive=no
fi
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
fi
echo "$as_me:$LINENO: result: $libgomp_cv_have_as_symver_directive" >&5
echo "${ECHO_T}$libgomp_cv_have_as_symver_directive" >&6
if test $libgomp_cv_have_as_symver_directive = yes; then
cat >>confdefs.h <<\_ACEOF
#define HAVE_AS_SYMVER_DIRECTIVE 1
_ACEOF
fi
if test $enable_symvers != no; then

3
libgomp/libgomp.h
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@ -1,4 +1,4 @@
/* Copyright (C) 2005, 2007, 2008 Free Software Foundation, Inc.
/* Copyright (C) 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@redhat.com>.
This file is part of the GNU OpenMP Library (libgomp).
@ -516,6 +516,7 @@ gomp_work_share_init_done (void)
#if !defined (HAVE_ATTRIBUTE_VISIBILITY) \
|| !defined (HAVE_ATTRIBUTE_ALIAS) \
|| !defined (HAVE_AS_SYMVER_DIRECTIVE) \
|| !defined (PIC)
# undef LIBGOMP_GNU_SYMBOL_VERSIONING
#endif