drawterm/libc/nan.h

*8ccd4a63SDavid du Colombierextern double __NaN(void);
*8ccd4a63SDavid du Colombierextern double __Inf(int);
*8ccd4a63SDavid du Colombierextern int __isNaN(double);
*8ccd4a63SDavid du Colombierextern int __isInf(double, int);