Simple socket server example build error

Hardware consistes of CPU, SDRAM, LAN91C111, TIMER, UART_JTAG, PIO(8 bit for LED), PIO(16 bit for seven_seg)

Software is the example from kits.

When built without modifing, errores were occurred, it read make[clean]:error 127 (ignored), and make:***[alt_error_handler.o] error 2

So I had to check which files encoutered problems ,found that unresolved inclusion showing.# include <alt_iniche_dev.h># include "ipport.h"# include "tcpport.h"# include "libport.h"# include "osport.h"

So how to deal with them? Thanks for any suggestions.