1/* Definition of `errno' variable. Canonical version.
2 Copyright (C) 2002-2023 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
36