Hi Marcus,
Thanks for your reply.
However, I do not understand it (I guess this is because I am a beginner). Sorry.
I did not link my block to any gnuradio-blocks. And I have written nothing in my block’s QA file.
Are you suggesting that I need to include more things at the beginning of my block’s CPP script?
Best wishes,
Shumin Yao.
Sent from
Mail for Windows 10
Are you linking against gnuradio-blocks?
You'll need something like (depends on your GNU Radio's OOT template how
this looks exactly):
target_link_libraries(gnuradio-yourmodulename gnuradio::gnuradio-runtime
gnuradio::gr-blocks)
On 15.12.20 10:38, Shumin Yao wrote:
> Hi,
>
>
>
> I am writing a block that needs to call the gr::blocks::count_bits32()
> method in its corresponding CPP script. At the beginning of the script,
> I have added "#include <gnuradio/blocks/count_bits.h>".
>
>
>
> When I used the "make" command to compile the program, no errors occurred.
>
>
>
> However, when I typed the "ctest -V" command in the terminal to check
> the compilation, the following error appeared: "ImportError:
> /home/<my-path>/build/lib/libgnuradio-<my-module’s-name>.so: undefined
> symbol: _ZN2gr6blocks12count_bits32Ej"
>
>
>
> Then, I typed the "c++filt _ZN2gr6blocks12count_bits32Ej" command in the
> terminal and obtained an output: "gr::blocks::count_bits32(unsigned int)".
>
>
>
> Do you have any idea why I encounter this error?
>
>
>
> Best wishes,
>
> Shumin Yao.
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
>