NetBSD/sys/arch/alpha/include/math.h

/*	$NetBSD: math.h,v 1.3 2000/02/05 14:04:36 kleink Exp $	*/

/*
 * ISO C99
 */
#if !defined(_ANSI_SOURCE) && \
    (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) || \
     defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L)
extern __const char	__nanf[];
#define	NAN		(*(__const float *)(__const void *)__nanf)
#endif
Improve namespace test macros a bit. 2000-02-05 17:04:36 +03:00			`/* $NetBSD: math.h,v 1.3 2000/02/05 14:04:36 kleink Exp $ */`
C99: Define a NAN macro in <math.h> which evaulates to a constant expression of a single-precision quiet NaN; only to be defined on platforms that do support this value. 1999-12-23 13:15:05 +03:00
			`/*`
			`* ISO C99`
			`*/`
Improve namespace test macros a bit. 2000-02-05 17:04:36 +03:00			`#if !defined(_ANSI_SOURCE) && \`
			`(!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) \|\| \`
			`defined(_ISOC99_SOURCE) \|\| (__STDC_VERSION__ - 0) >= 199901L)`
const -> __const and include <sys/cdefs.h> earlier; fixes PR lib/9052 by Takahiro Kambe. 2000-01-04 17:20:05 +03:00			`extern __const char __nanf[];`
			`#define NAN ((__const float )(__const void *)__nanf)`
C99: Define a NAN macro in <math.h> which evaulates to a constant expression of a single-precision quiet NaN; only to be defined on platforms that do support this value. 1999-12-23 13:15:05 +03:00			`#endif`