HI,
I'm trying to build the costas loop block..but it showing the error
like this while I execute the make command:
/home/lekha/gr-digital/lib/cost_impl.cc: In constructor
‘gr::digital::cost_impl::cost_impl(float, int)’:
/home/lekha/gr-digital/lib/cost_impl.cc:47:15: error: type
‘gr::blocks::control_loop’ is
not a direct or virtual base of ‘gr::digital::cost_impl’
/home/lekha/gr-digital/lib/cost_impl.cc: In member function ‘virtual int
gr::digital::cost_impl::work(int, gr_vector_const_void_star&,
gr_vector_void_star&)’:
what is problem? thanks for your help.
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