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/* Definition of `errno' variable. Canonical version.
Copyright (C) 2002, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <tls.h>
#include <dl-sysdep.h>
#undef errno
#if RTLD_PRIVATE_ERRNO
/* Code compiled for rtld refers only to this name. */
int rtld_errno attribute_hidden;
#elif USE___THREAD
__thread int errno;
extern __thread int __libc_errno __attribute__ ((alias ("errno")))
attribute_hidden;
#else
/* This differs from plain `int errno;' in that it doesn't create
a common definition, but a plain symbol that resides in .bss,
which can have an alias. */
int errno __attribute__ ((nocommon));
strong_alias (errno, _errno)
/* We declare these with compat_symbol so that they are not visible at
link time. Programs must use the accessor functions. RTLD is special,
since it's not exported from there at any time. */
# if defined HAVE_ELF && defined SHARED && defined DO_VERSIONING
# include <shlib-compat.h>
compat_symbol (libc, errno, errno, GLIBC_2_0);
compat_symbol (libc, _errno, _errno, GLIBC_2_0);
# endif
#endif
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