[zeromq-dev] Revisited: Example for building against ZMQ with CMake + UDP Multicast Support

Stephan again opfer at vs.uni-kassel.de
Wed Sep 26 15:13:45 CEST 2018


I asked this question/issue one and a half year ago 
The difference is that I now would like to use zeromq (draft api) 
version 4.2.5 under Ubuntu 18.04.

My minimal (not) working example can be found here: 

Compiling it with this command:

     g++ Discovery.cpp -lzmq -DZMQ_BUILD_DRAFT_API=1 -o test

produces this:

     /tmp/ccUwelWs.o: In function `msg_send(zmq_msg_t*, void*, char 
const*, char const*)':
     Discovery.cpp:(.text+0x8e): undefined reference to `zmq_msg_set_group'
     /tmp/ccUwelWs.o: In function `msg_recv_cmp(zmq_msg_t*, void*, char 
const*, char const*)':
     Discovery.cpp:(.text+0x148): undefined reference to `zmq_msg_group'
     /tmp/ccUwelWs.o: In function `main':
     Discovery.cpp:(.text+0x30e): undefined reference to `zmq_leave'
     Discovery.cpp:(.text+0x37f): undefined reference to `zmq_join'
     Discovery.cpp:(.text+0x3c3): undefined reference to `zmq_join'
     Discovery.cpp:(.text+0x407): undefined reference to `zmq_join'
     Discovery.cpp:(.text+0x57c): undefined reference to `zmq_join'
     Discovery.cpp:(.text+0x668): undefined reference to `zmq_leave'
     collect2: error: ld returned 1 exit status

Any help is welcome. :)

Kind Regards


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