ref: a70379d7e4b822f532fb0a8ccdd1624a90b64a68
dir: /src/nan.h/
#pragma once #if defined(__plan9__) extern double D_PNAN, D_PINF; #else #define D_PNAN __builtin_nan("") #define D_PINF __builtin_inf() #endif extern double D_NNAN, D_NINF; void nan_init(void);