Re: [Discuss-gnuradio] GNU Radio & GSL

[Josh Blum]

On 11/14/2012 01:59 PM, Zing Yu wrote:
> Below link might be helpful to you:
> http://www.ruby-forum.com/topic/4407135#new
> 
> 

gr-wavelet is a good example for this as well.

-josh

> 
> ________________________________
>  From: Adriana Arteaga <address@hidden>
> To: "address@hidden" <address@hidden> 
> Sent: Wednesday, November 14, 2012 3:56 PM
> Subject: [Discuss-gnuradio] GNU Radio & GSL
>  
> 
>  
> Hi!
> 
> I'm trying to do a block for GRC, using some functions availables in GSL.
> First, I put a example within work function including "#include 
> <gsl/gsl_sf_bessel.h>"
> 
> ***************
> int
> ocupacion_correlator::general_work (int noutput_items,
>                    gr_vector_int &ninput_items,
>                    gr_vector_const_void_star &input_items,
>                    gr_vector_void_star &output_items)
> {
>   const float *in = (const float *) input_items[0];
>   float *out = (float *) output_items[0];
>   float x = 5.0;
>   float y = gsl_sf_bessel_J0 (x);
>   printf ("J0(%g) = %.18e\n", x, y);
>   out[0]=y;
>   out[1]=x;
> 
>   // Tell runtime system how many input items we consumed on
>   // each input stream.
>   consume_each (noutput_items);
> 
>   // Tell runtime system how many output items we produced.
>   return noutput_items;
> }
> ***************
> 
> During the exection of cmake, make and make install, I didn't have any 
> problem. But, when I execute the flow graph in GRC this error appears:
> 
> ****************
> Traceback (most recent call last):
>   File "/home/xuan/Documents/GRC 
> generados/probando_correlator_gsl/top_block.py", line 14, in <module>
>     import ocupacion
>   File "/usr/local/lib/python2.7/dist-packages/ocupacion/__init__.py", line 
> 45, in <module>
>     from ocupacion_swig import *
>   File "/usr/local/lib/python2.7/dist-packages/ocupacion/ocupacion_swig.py", 
> line 26, in <module>
>     _ocupacion_swig = swig_import_helper()
>   File "/usr/local/lib/python2.7/dist-packages/ocupacion/ocupacion_swig.py", 
> line 22, in swig_import_helper
>     _mod = imp.load_module('_ocupacion_swig', fp, pathname, description)
> ImportError: /usr/local/lib/libgnuradio-ocupacion.so: undefined symbol: 
> gsl_sf_bessel_J0
> ****************
> 
> I think I have to make some change on Makefile or a PATH, but I don't know 
> how. I installed gsl-bin and libgsl0ldbl packets.
> 
> Best Regards.
> 
> Adriana A.
> 
> 
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