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