NetBSD/sys/arch/sh3/include/math.h

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/* $NetBSD: math.h,v 1.2 2000/02/05 14:04:40 kleink Exp $ */
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/*
* ISO C99
*/
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#if !defined(_ANSI_SOURCE) && \
(!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) || \
defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L)
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extern __const char __nanf[];
#define NAN (*(__const float *)(__const void *)__nanf)
#endif