Hi all:
I am running an rtlinux program under Knoppix. The program has been tested successfully on another computer. But on my computer, when I insert the module, there is an error read like the following:

hello.o: hello.o: unresolved symbol rtl_printf
hello.o: hello.o: unresolved symbol gethrtime
hello.o: hello.o: unresolved symbol rtl_sched
hello.o: hello.o: unresolved symbol pthread_delete_np
hello.o: hello.o: unresolved symbol pthread_make_periodic_np
hello.o: hello.o: unresolved symbol pthread_wait_np
hello.o: hello.o: unresolved symbol __pthread_create
hello.o:
Hint: You are trying to load a module without a GPL compatible license
and it has unresolved symbols. The module may be trying to access
GPLONLY symbols but the problem is more likely to be a coding or
user error. Contact the module supplier for assistance, only they
can help you.

Anyone can help?