1: /* Copyright (C) 1996,97,98,2002,2003 Free Software Foundation, Inc.
    2:    This file is part of the GNU C Library.
    3: 
    4:    The GNU C Library is free software; you can redistribute it and/or
    5:    modify it under the terms of the GNU Lesser General Public
    6:    License as published by the Free Software Foundation; either
    7:    version 2.1 of the License, or (at your option) any later version.
    8: 
    9:    The GNU C Library is distributed in the hope that it will be useful,
   10:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   11:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   12:    Lesser General Public License for more details.
   13: 
   14:    You should have received a copy of the GNU Lesser General Public
   15:    License along with the GNU C Library; if not, write to the Free
   16:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   17:    02111-1307 USA.  */
   18: 
   19: #include <features.h>
   20: #include <netdb.h>
   21: #undef h_errno
   22: 
   23: #include <tls.h>
   24: 
   25: /* We need to have the error status variable of the resolver
   26:    accessible in the libc.  */
   27: 
   28: #if USE___THREAD
   29: __thread int h_errno;
   30: extern __thread int __libc_h_errno __attribute__ ((alias ("h_errno")))
   31:   attribute_hidden;
   32: # define h_errno __libc_h_errno
   33: #else
   34: /* This differs from plain `int h_errno;' in that it doesn't create
   35:    a common definition, but a plain symbol that resides in .bss,
   36:    which can have an alias.  */
   37: int h_errno __attribute__((section (".bss")));
   38: weak_alias (h_errno, _h_errno)
   39: 
   40: /* We declare these with compat_symbol so that they are not
   41:    visible at link time.  Programs must use the accessor functions.  */
   42: # if defined HAVE_ELF && defined SHARED && defined DO_VERSIONING
   43: #  include <shlib-compat.h>
   44: compat_symbol (libc, h_errno, h_errno, GLIBC_2_0);
   45: compat_symbol (libc, _h_errno, _h_errno, GLIBC_2_0);
   46: # endif
   47: #endif