(I am using gnuradio installed from the maint-3.8 branch of the github for reference)
Hello, as the title states I am having trouble making custom zmq pub/sub message blocks for gnuradio. The problem I am having is when I include any code in the block that uses the zmq library (ie zmq::context_t) my flowgraph gives a "AttributeError: module 'pduzmq' has no attribute 'newzmq'". But if I remove use of the zmq library from the block, it builds and runs fine in my flowgraph.
I have a c++ program outside of gnuradio that can use zmq fine. When I compile that program program I do it like so:
$ g++ zmq.cpp -o zmq -lzmq
This allows the c++ program to run. But when I compile it without the "-lzmq" flag there are a bunch of errors like "undefined references to 'zmq_errno'". Not entirely sure, but is this because my c++ program can't find the zmq library.
So I'm thinking that the oot module building does not include the "-lzmq" flag and so it struggles to find the zmq library just like my c++ program. I have tried using '$ cmake -DCMAKE_CXX_FLAGS="-lzmq" ..' with the building process but it didn't help.
I'm wondering if anyone has a better idea of what the problem might be, or how to use compiler flags with the gnuradio build process, thanks.