1    	/* Default `HUGE_VALL' constant.
2    	   Used by <stdlib.h> and <math.h> functions for overflow.
3    	   Copyright (C) 1992, 1996, 1997, 2004 Free Software Foundation, Inc.
4    	   This file is part of the GNU C Library.
5    	
6    	   The GNU C Library is free software; you can redistribute it and/or
7    	   modify it under the terms of the GNU Lesser General Public
8    	   License as published by the Free Software Foundation; either
9    	   version 2.1 of the License, or (at your option) any later version.
10   	
11   	   The GNU C Library is distributed in the hope that it will be useful,
12   	   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14   	   Lesser General Public License for more details.
15   	
16   	   You should have received a copy of the GNU Lesser General Public
17   	   License along with the GNU C Library; if not, write to the Free
18   	   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19   	   02111-1307 USA.  */
20   	
21   	#ifndef _MATH_H
22   	# error "Never use <bits/huge_vall.h> directly; include <math.h> instead."
23   	#endif
24   	
25   	#if __GNUC_PREREQ(3,3)
26   	# define HUGE_VALL	(__builtin_huge_vall())
27   	#else
28   	# define HUGE_VALL	((long double) HUGE_VAL)
29   	#endif
30