this is very strange. It looks like there’s an extra module (that you
shouldn’t be rebuilding, anyway) which tries to find an old version of
Radio. Can you tell us which module that is?
You should realize what your doing here: you download the build-gnuradio
script anew, and then call it two times… that’s one download and one
execution too many.
The pupose of the build-gnuradio script is to fetch the source code and
install all requirement, and in the end build GNU Radio and install it.
Since you’re modifying the source code, this might not be what you
What you should be doing is going into your existing gnuradio/build
directory, and do a “make -j3”, “sudo make install”. This should be
faster. Please check that your modifications are still around before,
build-gnuradio might have overwritten them.
Again, please have a look at
In the other thread you asked what you can do to understand the C++
my suggestion here is going through
the “core concepts” and the “developing out-of-tree modules” tutorial,
well as “how to debug”. I think the problem lies usually less in the C++
code but in the complexity brought on by a complex framework such as GNU
Radio and by a complex task such as doing OFDM synchronization in
– it’s very important you get a feeling of what the system is doing
what you are doing with the system) before trying to understand the C++
code in isolation.
Hope that helped a little,
 or something, the -j parameters tells make how many things to do in
parallel. As a rule of thumb: Number of CPU cores + 1