upstream has an option, would probably make sense to pass this to the user https://github.com/clbr/radeontop/blob/master/Makefile#L6
It only adds '-g' to CFLAGS, in such cases adding debug USE flag is wrong: user should adjust his CFLAGS instead. https://github.com/clbr/radeontop/blob/master/Makefile#L34
you are right, I thought it adds debug paths :)