1/* Definition of `errno' variable.  Canonical version.
 2   Copyright (C) 2002-2025 Free Software Foundation, Inc.
 3   This file is part of the GNU C Library.
 4
 5   The GNU C Library is free software; you can redistribute it and/or
 6   modify it under the terms of the GNU Lesser General Public
 7   License as published by the Free Software Foundation; either
 8   version 2.1 of the License, or (at your option) any later version.
 9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, see
17   <https://www.gnu.org/licenses/>.  */
18
19#include <errno.h>
20#include <tls.h>
21#include <dl-sysdep.h>
22#undef errno
23
24#if RTLD_PRIVATE_ERRNO
25
26/* Code compiled for rtld refers only to this name.  */
27int rtld_errno attribute_hidden;
28
29#else
30
31__thread int errno;
32extern __thread int __libc_errno __attribute__ ((alias ("errno")))
33  attribute_hidden;
34
35#endif