Hi Vasil, You are right, it helped thank you. One more question, do you know why the command: *g++ main.cpp -lgnuradio-filter *works correctly but in different order: *g++ -lgnuradio-filter main.cpp* crashes?
wt., 22 lut 2022 o 14:19 Vasil Velichkov <vvvelich...@gmail.com> napisał(a): > Hi Marcin, > > On 22/02/2022 14.32, Marcin Puchlik wrote: > > But I am not creating the OOT module, I want to get filter taps using > > *low_pass()* function in simple C++ program (Hello World). > > It does not really matter what you are building, if you want to use this > function then you need to link this library. > > I even ran this from cmd with the command: *g++ > > -I/usr/include/gnuradio/filter -L/usr/lib/x86_64-linux-gnu/ main.cpp * > > You need to add -lgnuradio-filter parameter > > g++ -I/usr/include/gnuradio/filter -L/usr/lib/x86_64-linux-gnu/ > -lgnuradio-filter main.cpp > > Cheers, > Vasil > > > > and the error is: > > > > > > > > */bin/ld: /tmp/ccTlKCri.o: in function `main':main.cpp:(.text+0xc7): > > undefined reference to `gr::filter::firdes::low_pass_2(double, double, > > double, double, double, gr::fft::window::win_type, double)'collect2: > error: > > ld returned 1 exit status* > > > > > > > > wt., 22 lut 2022 o 13:22 Vasil Velichkov <vvvelich...@gmail.com> > napisał(a): > > > >> Hi Marcin, > >> > >> On 22/02/2022 13.09, Marcin Puchlik via GNU Radio, the Free & > Open-Source > >> Toolkit for Software Radio wrote: > >>> I also tried to use *low_pass() *function in my C++ program but with no > >>> luck. My linker shouts that there is undefined reference to this > function > >>> but headers where recognized. > >> > >> You need to link your OOT module to gnuradio-filter library - in > >> lib/CMakeLists.txt in target_link_libraries() add gnuradio-filter. > >> > >> target_link_libraries(gnuradio-test gnuradio::gnuradio-runtime > >> gnuradio-filter) > >> > >> Regards, > >> Vasil > >> > > > >
