Re: [Discuss-gnuradio] .so: undefined symbol: _ZN2gr6blocks12count_bits16E

[Bastian Bloessl]

On 02/11/2014 11:17 AM, raf raf wrote:
> Hi Marcus,
>
> I tried to have a lib/CMakeLists.txt  and CMakeLists.txt with a same
> content like in ieee802-15-4 of Bastian, but it didn't work and now I
> had  this error after a modifications :

You do not set required components as we suggested in the previous post. 
Therefore you end up with default libs and these defaults do not include 
libgnuradio-blocks (which you require).

You tried to set components but forgot PMT, then you got the error:
ImportError: /usr/local/lib/libgnuradio-ieee_868_915.so: undefined 
symbol: 
_ZN2gr12msg_accepter4postEN5boost13intrusive_ptrIN3pmt8pmt_baseEEES5_

Currently, you link only against gnuradio-runtime...

> ImportError:
> /usr/local/lib/python2.7/dist-packages/ieee_868_915/_ieee_868_915_swig.so:
> undefined symbol: _ZN2gr12ieee_868_91511packet_sink4makeEv

It would be helpful to check in an example. Your GRC bindings are btw 
not working

  <param>
    <name>...</name>
    <key>...</key>
    <type>...</type>
  </param>

  <!-- Make one 'sink' node per input. Sub-nodes:
       * name (an identifier for the GUI)
       * type
       * vlen
       * optional (set to 1 for optional inputs) -->
  <sink>
    <name>in</name>
    <type><!-- e.g. int, float, complex, byte, short, xxx_vector, 
...--></type>
  </sink>

you have to fill in some stuff here.