../common/sched_thread.o: In function `sched_start':
/media/My_Documents/tutorial/FastDFS/tracker/../common/sched_thread.c:495: undefined reference to `pthread_create'
../common/pthread_func.o: In function `init_pthread_lock':
/media/My_Documents/tutorial/FastDFS/tracker/../common/pthread_func.c:32: undefined reference to `pthread_mutexattr_init'
/media/My_Documents/tutorial/FastDFS/tracker/../common/pthread_func.c:
 
40: undefined reference to `pthread_mutexattr_settype'
/media/My_Documents/tutorial/FastDFS/tracker/../common/pthread_func.c:57: undefined reference to `pthread_mutexattr_destroy'
../common/pthread_func.o: In function `init_pthread_attr':
/media/My_Documents/tutorial/FastDFS/tracker/../common/pthread_func.c:84: undefined reference to `pthread_attr_getstacksize'
/media/My_Documents/tutorial/FastDFS/tracker/../common/pthread_func.c:
 
115: undefined reference to `pthread_attr_setstacksize'
../common/pthread_func.o: In function `create_work_threads':
/media/My_Documents/tutorial/FastDFS/tracker/../common/pthread_func.c:156: undefined reference to `pthread_create'
../common/pthread_func.o: In function `kill_work_threads':
/media/My_Documents/tutorial/FastDFS/tracker/../common/pthread_func.c:
 
182: undefined reference to `pthread_kill'
collect2: error: ld returned 1 exit status
make: *** [fdfs_monitor] Error 1