Please check the presence of the following header files on your system

#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/time.h>
#include <fcntl.h>
#include <sys/utsname.h>