Hello,
I am trying to implement my own header class derived from
'header_format_default' named 'header_format_counter_dif'. As you can
imagine, the class is quite similar to 'header_format_counter' with some
minor adjustments. My situation is almost identical to the one presented in
this mailing list before
https://lists.gnu.org/archive/html/discuss-gnuradio/2017-04/msg00063.html
However, the difference is that I am using GNU Radio 3.9, so in my case the
steps I have taken are
*Steps taken so far:*
1. Created my new module *TFMv3 *with gr_modtool
2. Added *header_format_counter_dif* (c++) using gr_modtool as type
'noblock'
3. Fleshed out the .cc and .h files based on the class
'header_format_counter' (but with some changes).
4. Made sure to *#include <gnuradio/digital/header_format_default.h>* in
the header file
5. Used *digital::header_format_default* as the parent class in the class
declaration since it's now in separate namespace to 'digital'
6. Add the line set(GR_REQUIRED_COMPONENTS RUNTIME DIGITAL) at
gr-TFMv3/CMakeLists.txt
6. Add the line py::module::import("gnuradio.digital") at python_bindings.cc
After that, I run *gr_modtool bind header_format_counter_dif *and I am able
to compile successfully. However, when importing TFMv3 I get the error
*undefined
symbol: _ZTIN2gr7digital21header_format_defaultE* which stand for *typeinfo
for gr::digital::header_format_default* (I found out using a C++ name
demangler).
So it seems I am missing something when including the mother class
correctly. Any ideas about what it might be?
Than you very much,
Álvaro
