Hi
I am trying to install a costas loop block in GNU Radio whose code was written in C++ by my professor back 2012. Now I have .cc .h .i and .xml files of his code. I am using gr-modtool to make a folder and then adding file in it. After that I edited the newly generated .cc and .h files in lib folder with C++ code provided by my professor. While compiling those files in Linux terminal using cmake ../ and then make command in terminal, I am getting an error (fatal error: gr_math.h: No such file or directory #include <gr_math.h>) whose image is attached. It looks like that camke is trying to find this gr_math.h file in the local out of tree directory but it should be finding it in the main GNU directory. So kindly help me fix this error as I am new to GNU Radio and Linux environment.
Regards
Error_costas.png