Re: Aw: Re: AttributeError: OOT Modul

[Vasil Velichkov]

Hi Till,

Please always try to keep the mailing list in the loop and do not reply 
privately.

Here is how to demangle these undefined symbols

  $ c++filt _ZN3uhd4usrp10multi_usrp4makeERKNS_13device_addr_tE
  uhd::usrp::multi_usrp::make(uhd::device_addr_t const&)

  $ c++filt 
_ZN3uhd13device_addr_tC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE
  uhd::device_addr_t::device_addr_t(std::__cxx11::basic_string<char, 
std::char_traits<char>, std::allocator<char> > const&)

You need to link the uhd library to your OOT module. In your lib/CMakeLists.txt 
you need something like

  target_link_libraries(gnuradio-control
    UHD::UHD
    #other libraries
  )

Best Regards,
Vasil

On 17/02/2020 16.00, "Till Hülder" wrote:
> Hi Vasil,
> i do get any undefined symbols:
> iheamira@iheamira-MS-7885:~/Dokumente/BA_Huelder/GPIO_modul/gr-control/build$ 
> ldd -r lib/lib*.so
> lib/libgnuradio-control-1.0.0git.so:
> undefined symbol: _ZN3uhd4usrp10multi_usrp4makeERKNS_13device_addr_tE   
>   (lib/libgnuradio-control-1.0.0git.so)
> undefined symbol: 
> _ZN3uhd13device_addr_tC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE
>     (lib/libgnuradio-control-1.0.0git.so)
> undefined symbol: _ZN3uhd4usrp10multi_usrp4makeERKNS_13device_addr_tE   
>   (lib/libgnuradio-control.so)
> undefined symbol: 
> _ZN3uhd13device_addr_tC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE
>     (lib/libgnuradio-control.so)
> iheamira@iheamira-MS-7885:~/Dokumente/BA_Huelder/GPIO_modul/gr-control/build$ 
> ldd -r swig/*_swig.so
> undefined symbol: _ZN3uhd4usrp10multi_usrp4makeERKNS_13device_addr_tE   
>   (/usr/local/lib/libgnuradio-control-1.0.0git.so.0.0.0)
> undefined 
> symbol:_ZN3uhd13device_addr_tC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE
>    
>   (/usr/local/lib/libgnuradio-control-1.0.0git.so.0.0.0)
> How can i fix this?
> Best regards,
> Till
> *Gesendet:* Mittwoch, 12. Februar 2020 um 18:12 Uhr
> *Von:* "Vasil Velichkov" <address@hidden>
> *An:* "Till Hülder" <address@hidden>
> *Cc:* address@hidden
> *Betreff:* Re: AttributeError: OOT Modul
> Hi Till,
> 
> On 12/02/2020 16.46, "Till Hülder" wrote:
>  > Hello,
>  > i build a OOT Module and after installing i get this error when i run the 
> program .
>  > File "/home/iheamira/Dokumente/BA_Huelder/gnu-radio/top_block.py", line 
> 219,
>  > in <module>
>  > main()
>  > File "/home/iheamira/Dokumente/BA_Huelder/gnu-radio/top_block.py", line 
> 207,
>  > in main
>  > tb = top_block_cls()
>  > File "/home/iheamira/Dokumente/BA_Huelder/gnu-radio/top_block.py", line 
> 142,
>  > in __init__
>  > self.control_control_b_0 = control.control_b(5e-6, 1000, 10, 5e-6, 5e-6,
>  > 5e-6, 200e-6, 100e-6, 0.2, samp_rate)
>  > AttributeError: 'module' object has no attribute 'control_b'
> 
> One possible reason for such error is that there are undefined symbols in 
> your 
> shared library.
> 
> Go to the build directory and execute
> 
> ldd -r lib/lib*.so
> ldd -r swig/*_swig.so
> 
> and if you see "undefined symbol:" messages that means you are not linking 
> all 
> dependencies.
> 
> Also in `python/__init__.py` you probably have a try except block like this 
> one
> 
> # import swig generated symbols into the OOT namespace
> try:
> # this might fail if the module is python-only
> from .OOT_swig import *
> except ImportError:
> pass
> 
> Consider removing the try: and except and keep only the import line
> 
> from .OOT_swig import *
> 
> Read also:
> https://lists.gnu.org/archive/html/discuss-gnuradio/2020-02/msg00047.html
> https://lists.gnu.org/archive/html/discuss-gnuradio/2020-02/msg00054.html
> 
> Regards,
> Vasil
>