Re: [Discuss-gnuradio] Building new blocks in Gnu Radio

[Ben Reynwar]

On Mon, Mar 26, 2012 at 10:42 AM, Francisco
<address@hidden> wrote:
> Ben Reynwar <ben <at> reynwar.net> writes:
>
>>
>> I think that the best way to get started is to use Martins gr-modtool.
>>  It will help you to make out-of-tree blocks (out-of-tree means
>> separate but compatible with your main gnuradio installation).
>>
>> It can be found at:
>> https://github.com/mbant/gr-modtool
>>
>> On Mon, Mar 26, 2012 at 2:58 AM, Ebtisam Ahmed <ebtisamahmed90 <at> 
>> gmail.com>
> wrote:
>> > Indeed i have read but i cant understand the building process. I built
>> > it the i understood but it failed terribly, i have made .h .cc .i and
>> > makefile.am. Put them in one folder and then done make. i also tried
>> > ./configure and ./bootstrap but it doesnt work
>> >
>> > Anyways thanx for ur time and help me on this....
>> >
>> > Regards,
>> > Ebtisam
>> >
>> > _______________________________________________
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>> > Discuss-gnuradio <at> gnu.org
>> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>
>
> Hi all,
>
> I've decided to follow your suggestion and get gr_modtool.py.
>
> First I created the module with this script which created some folders, files
> and the .cc and .h files with skeleton code.
>
> Then I put my code in the .cc and .h files. I also changed the .xml file so I
> can use GRC (I haven't used python yet to create graphs).
>
> After this, I used cmake. I wrote:
>>cmake -i
>>sudo make
>>sudo make install
>>sudo ldconfig
>
> These were my steps to build a new block to use in GRC. However, I get this
> error:
>
> ImportError: /usr/local/lib/python2.7/dist-
> packages/mycoolstuff/_mycoolstuff_swig.so: undefined symbol:
> _Z38mycoolstuff_make_decimated_average_vccifi
>
> Yes. My module and block are called mycoolstuff and decimated_average_vcc.cc
>
> It seems that there is a problem with the swig. Do I have to configure 
> anything
> in the .i files before starting to use cmake?
>
> Regards,
> Francisco
>
>
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It looks like there is currently a bug in gr-modtool where when you
generate a new block it gets the module and block name wrong way
round.