Re: [Discuss-gnuradio] New dsp block: no constructor defined

[LianFeier]

----------------------------------------
> From: address@hidden
> Date: Fri, 12 Apr 2013 19:44:26 -0400
> Subject: Re: [Discuss-gnuradio] New dsp block: no constructor defined
> To: address@hidden
> CC: address@hidden
>
> On Wed, Apr 10, 2013 at 11:10 PM, LianFeier <address@hidden> wrote:
> > Hi!
> >
> > I'm writing a signal processing block with gr-modtool. I've successfully 
> > make. When I try ctest -V, I get the "No constructor defined" error. The 
> > swig interface file which gr_modtool generates is like:
> >
> > /* -*- c++ -*- */
> >
> > #define myblock_API
> >
> > %include "gnuradio.i" // the common stuff
> >
> > //load generated python docstrings
> > %include "myblock_swig_doc.i"
> >
> > %{
> > #include "myblock/myclass.h"
> > %}
> >
> >
> > %include "myblock/myclass.h"
> > GR_SWIG_BLOCK_MAGIC2(myblock, myclass);
> >
> > I've seen some threads that said swapping the last two lines would help, 
> > but in my case it didn't. I'm using the latest version of gr-modtool(it 
> > generates xx_impl.cc,xx_impl.h and xx.h), and my gnuradio version is 3.6.0.
>
> No, you should be fine with the above setup. We fixed that issue a while ago.
>
> > Could anybody kindly help?
>
> I'm not sure. This usually happens when swig isn't run correctly or
> installed correctly (are you testing this just with QA code or after
> installing it?).
>
> Can you write down what steps you took when building your code?
>
> Tom
>

Hi Tom,

Thanks for your reply!

I haven't installed it yet, i am testing it with the QA code.

What I did after editing the files generated by gr-modtool is:

In the directory of my block:

mkdir build
cd build
cmake ../
make
make test

I only edited the xx_impl.cc, xx_impl.h, xx.h ,qa_xx.py and the .i files among 
the whole bunch of files generated by gr_modtool. Is that all I should do?

I can now actually piggyback my codes into gnuradio-core and rebuild gnuradio 
to use gr.myclass in python, but that seems to be very tedious. Not sure 
whether this information helps.

Thanks,
Fei