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math.h revision 1.3.6.2 
      1  1.3.6.2  bouyer /*	$NetBSD: math.h,v 1.3.6.2 2000/11/20 20:25:40 bouyer Exp $	*/
      2  1.3.6.2  bouyer 
      3  1.3.6.2  bouyer /*
      4  1.3.6.2  bouyer  * ISO C99
      5  1.3.6.2  bouyer  */
      6  1.3.6.2  bouyer #if !defined(_ANSI_SOURCE) && \
      7  1.3.6.2  bouyer     (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) || \
      8  1.3.6.2  bouyer      defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L)
      9  1.3.6.2  bouyer extern __const char	__nanf[];
     10  1.3.6.2  bouyer #define	NAN		(*(__const float *)(__const void *)__nanf)
     11  1.3.6.2  bouyer #endif
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