[Discuss-gnuradio] unable to make check my own cc file

[rajenish kumar jain]

Hi,
  I have written anew c++ file within howto module. I have writeen a .cc file a .h file and added the interface to .i swig file as mentioned in chapter 10 and 11 of the tutorial.
I have replaced the code within the exisintg howto_square_ff.cc  and howto_square_ff2.cc. Till this point it works fine. Then i wrote new howto_awgn_ff.cc file and howto_awgn_ff.h file in the same directory. But this doesnt work. the make check gives me the followong problem.
Please let me know what the problem could be
best regards
Rajenish
---------------------------------------------------------------------
Traceback (most recent call last):
  File "./qa_howto.py", line 24, in ?
    import howto
  File "/home/rkjain/gr-howto-write-a-block-0.4/src/lib/howto.py", line 4, in ?
    import _howto
ImportError: /home/rkjain/gr-howto-write-a-block-0.4/src/lib/.libs/_howto.so: un
defined symbol: _Z18howto_make_awgn_ffv
FAIL: run_tests
===================
1 of 1 tests failed
===================
make[3]: *** [check-TESTS] Error 1
make[3]: Leaving directory `/home/rkjain/gr-howto-write-a-block-0.4/src/python'
make[2]: *** [check-am] Error 2
make[2]: Leaving directory `/home/rkjain/gr-howto-write-a-block-0.4/src/python'
make[1]: *** [check-recursive] Error 1
make[1]: Leaving directory `/home/rkjain/gr-howto-write-a-block-0.4/src'
make: *** [check-recursive] Error 1
address@hidden gr-howto-write-a-block-0.4]#