How to use c++ in linux 2

 I try to run a hello.cpp that is an example program that come with
rtlinux. I can compile hello.cpp. after that I

[root@ss-sw1 cpp]# insmod rtl_cpp.o
[root@ss-sw1 cpp]# insmod app.o
app.o: unresolved symbol __cxa_pure_virtual
app.o: unresolved symbol __cxa_atexit
app.o:
Hint: You are trying to load a module without a GPL compatible license
      and it has unresolved symbols.  Contact the module supplier for
      assistance, only they can help you.

[root@ss-sw1 cpp]# insmod hello.o
hello.o: unresolved symbol __cxa_pure_virtual
hello.o: unresolved symbol __do_global_ctors_aux
hello.o: unresolved symbol __cxa_atexit
hello.o: unresolved symbol __dso_handle
hello.o: unresolved symbol __do_global_dtors_aux
hello.o:
Hint: You are trying to load a module without a GPL compatible license
      and it has unresolved symbols.  Contact the module supplier for
      assistance, only they can help you.

 Do you know what is the problem.
 Thank you verymuch.


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