contiki可加载的.o文件怎么编写编译

contiki可加载的.o文件怎么编写编译，

PROCESS(test_process1 "Test process");
PROCESS_THREAD(test_process1 ev data)
{
  static struct etimer etimer;

  PROCESS_BEGIN();

  rs232_print (RS232_PORT_1 "test_process 1 starting\n");
  printf("Hello world\n");

  while(1) {
    etimer_set(&etimer CLOCK_SECOND);
    PROCESS_WAIT_UNTIL(etimer_expired(&etimer));
    rs232_print (RS232_PORT_1 "Tick\n");
    etimer_set(&etimer CLOCK_SECOND);
    PROCESS_WAIT_UNTIL(etimer_expired(&etimer));
    rs232_print (RS232_PORT_1 "Tack\n");
  }

  PROCESS_END();
}

struct process * const autostart_processes[] = {&test_process1};#include <stdio.h>