#if defined(linux) || defined(IRIX) || defined(SOLARIS) || defined(OSF1) || defined(__FreeBSD__) || defined(__APPLE__) || defined(__NetBSD__) || defined(__sun) || defined(sun) || defined(__OpenBSD__) || defined(__DragonFly__)#	include "unix.h"#	ifdef __APPLE__#		define panic dt_panic#	endif#elif defined(WINDOWS)#	include "9windows.h"#	define main mymain#else#	error "Define an OS"#endif #ifdef IRIXtypedef int socklen_t;#endif