Then I can compile without any error messages, but when I run a flow graph to test the block, it turns out an error message like this:
Traceback (most recent call last):
File "/home/van-ly/sandbox/gnuradio-builds/Test/top_block.py", line 15, in <module>
import PNC4TWRN
File "/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/PNC4TWRN/__init__.py", line 45, in <module>
from PNC4TWRN_swig import *
File "/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/PNC4TWRN/PNC4TWRN_swig.py", line 28, in <module>
_PNC4TWRN_swig = swig_import_helper()
File "/opt/gnuradio-3.7.3/lib/python2.7/dist-packages/PNC4TWRN/PNC4TWRN_swig.py", line 24, in swig_import_helper
_mod = imp.load_module('_PNC4TWRN_swig', fp, pathname, description)
ImportError: /opt/gnuradio-3.7.3/lib/libgnuradio-PNC4TWRN.so: undefined symbol: _ZN2gr3fft11fft_complexC1Eibi