You have to add FFT to the top level CMakeLists.txt file. Like so:
set(GR_REQUIRED_COMPONENTS RUNTIME FFT)
Ron
On 05/19/2015 07:56 PM, Nguye^~n Va(n Lý wrote:
Hi all,
I created an out-of-tree module for my personal project.
In one block, I need to perform FFT and IFFF, so I put "*#include
<gnuradio/fft/fft.h>*" in the header file, and then declare
*fft::fft_complex *d_ifft;*
In the .cc file, I wrote *d_ifft = new fft::fft_complex(64, false, 1);*
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
Could any one please help me with this?
Does any one know how to use the perform FFT in an out-of-tree module?
Thank you in advance,
Van-Ly
Van-Ly Nguyen,
Research Assistant,
Signals and Systems Laboratory - SSL
Faculty of Electronics and Telecommunications - FET
University of Engineering and Technology - UET
Vietnam National University, Hanoi - VNU
Phone: (+84) 97 881 9406
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