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: /usr/include/
files >> /usr/include/errno.h
 /* Copyright (C) 1991,92,93,94,95,96,97,2002 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, see
   <http://www.gnu.org/licenses/>.  */

/*
 *	ISO C99 Standard: 7.5 Errors	<errno.h>
 */

#ifndef	_ERRNO_H

/* The includer defined __need_Emath if he wants only the definitions
   of EDOM and ERANGE, and not everything else.  */
#ifndef	__need_Emath
# define _ERRNO_H	1
# include <features.h>
#endif

__BEGIN_DECLS

/* Get the error number constants from the system-specific file.
   This file will test __need_Emath and _ERRNO_H.  */
#include <bits/errno.h>
#undef	__need_Emath

#ifdef	_ERRNO_H

/* Declare the `errno' variable, unless it's defined as a macro by
   bits/errno.h.  This is the case in GNU, where it is a per-thread
   variable.  This redeclaration using the macro still works, but it
   will be a function declaration without a prototype and may trigger
   a -Wstrict-prototypes warning.  */
#ifndef	errno
extern int errno;
#endif

#ifdef __USE_GNU

/* The full and simple forms of the name with which the program was
   invoked.  These variables are set up automatically at startup based on
   the value of ARGV[0] (this works only if you use GNU ld).  */
extern char *program_invocation_name, *program_invocation_short_name;
#endif /* __USE_GNU */
#endif /* _ERRNO_H */

__END_DECLS

#endif /* _ERRNO_H */

/* The Hurd <bits/errno.h> defines `error_t' as an enumerated type so
   that printing `error_t' values in the debugger shows the names.  We
   might need this definition sometimes even if this file was included
   before.  */
#if defined __USE_GNU || defined __need_error_t
# ifndef __error_t_defined
typedef int error_t;
#  define __error_t_defined	1
# endif
# undef __need_error_t
#endif
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