| /* 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 |