Re: [Discuss-gnuradio] playing nice with swig

[Eric Blossom]

On Tue, Aug 17, 2004 at 02:44:14PM -0500, David Carr wrote:
> I'm working on an AM demodulator using my gr_complex_mag block.  
> Unfourtunately I don't think I have everything working with SWIG.
> This is the error I get.
> 
> $ python am_demod_file.py 1
> audio: using audio_oss
> >>> gr_fir_scc: using SSE
> >>> gr_fir_fff: using SSE
> Traceback (most recent call last):
>  File "am_demod_file.py", line 168, in ?
>    main (sys.argv[1:])
>  File "am_demod_file.py", line 145, in main
>    fg = build_graph (IF_freq, None)
>  File "am_demod_file.py", line 50, in build_graph
>    complex_mag = gr.complex_mag()
> AttributeError: 'module' object has no attribute 'complex_mag'
> 
> This line in am_demod_file.py causes the error:
> complex_mag = gr.complex_mag()
> 
> My C++ code compiles.
> Here is my gr_complex_mag.i:
> 
> GR_SWIG_BLOCK_MAGIC (gr, complex_mag)
> 
> gr_complex_mag_sptr gr_make_complex_mag ();
> 
> class gr_complex_mag : public gr_sync_block
> {
>  gr_complex_mag ();
> };
> 
> I also added %include "gr_complex_mag.i" to general.i as well. 
> I added "gr_complex_mag.cc" to libgeneral_la_SOURCES and 
> "gr_complex_mag.h" to grinclude_HEADERS in Makefile.am
> 
> I did a make distclean, bootstrap.sh, configure, make and make install 
> but no love.
> 
> -David Carr
> 


Hmmm.  Looks OK to me.

I'm assuming you've also got a #include <gr_complex_mag.h> in 
general.i in addition to the %include "gr_complex_mag.i".
If not, it wouldn't have built.

Try this:

  $ cd gnuradio-core/src/lib/swig
  $ make clean
  $ make 
  $ make install

Then try your experiment again.

There's a known problem where the .i file dependencies aren't properly
tracked. 

http://comsec.com/bugzilla/show_bug.cgi?id=6

Eric