math.h revision 1.2 
11.2Sbjh21/*	$NetBSD: math.h,v 1.2 2003/04/28 23:16:19 bjh21 Exp $	*/
21.2Sbjh21
31.2Sbjh21#include <sys/featuretest.h>
41.1Sfredette
51.1Sfredette/*
61.1Sfredette * ISO C99
71.1Sfredette */
81.1Sfredette#if !defined(_ANSI_SOURCE) && \
91.2Sbjh21    (defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L || \
101.2Sbjh21     defined(_NETBSD_SOURCE))
111.1Sfredetteextern __const char	__nanf[];
121.1Sfredette#define	NAN		(*(__const float *)(__const void *)__nanf)
131.1Sfredette#endif
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