errno.c (1154B) - Raw
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. */ 27 int rtld_errno attribute_hidden; 28 29 #else 30 31 __thread int errno; 32 extern __thread int __libc_errno __attribute__ ((alias ("errno"))) 33 attribute_hidden; 34 35 #endif