ZeroMQ itself needs to be compiled with ENABLE_DRAFTS in CMake. You've added it to the compiler flags when building your own application. Did you compile ZeroMQ yourself or are you using a distro-provided version?
For the static library, one way is to give the full path to the .a file instead of using -lzmq. gcc default behavior prefers the shared object when both are present. -Jake On Wed, Sep 26, 2018 at 10:51 AM Stephan again <op...@vs.uni-kassel.de> wrote: > Hi Bill, > > adding -DENABLE_DRAFTS=On does not help: > > g++ Discovery.cpp -lzmq -DZMQ_BUILD_DRAFT_API=1 -DENABLE_DRAFTS=On -o test > > I also checked my installed libraries with "nm -gC <library | grep > zmq_msgs_group": > > /usr/lib/x86_64-linux-gnu/libzmq.a -> match > /usr/lib/x86_64-linux-gnu/libzmq.so -> no match > /usr/lib/x86_64-linux-gnu/libzmq.so.5 -> no match > /usr/lib/x86_64-linux-gnu/libzmq.so.5.1.5 -> no match > > I am not so into this dynamic and static library stuff, but my build chain > is linking agains "/usr/lib/x86_64-linux-gnu/libzmq.so". Is that the > problem? How do I force it on command line to link against the static > version. > > Kind Regards > > Stephan > > On 26.09.2018 16:08, Bill Torpey wrote: > > Hi Stephan: > > The RADIO/DISH sockets are considered DRAFT, which is probably why you’re > getting these errors. > > There are a couple of possibilities: > > - You may be linking against a version of libzmq that doesn’t include the > draft APIs. In order to build with draft support, the build needs to > specify "-DENABLE_DRAFTS=On” on the cmake command line. Make sure your > libzmq was built with support for the draft APIs. > > > - You also need to enable draft APIs in your code, similar to following: > > #define ZMQ_BUILD_DRAFT_API > #include <zmq.h> > > The #define makes the draft APIs visible to your code. > > (Never mind — you’re already doing this on the compile command). > > Hope this helps. > > Bill > > On Sep 26, 2018, at 9:13 AM, Stephan again <op...@vs.uni-kassel.de> wrote: > > Hi, > > I asked this question/issue one and a half year ago ( > https://lists.zeromq.org/mailman/private/zeromq-dev/2017-January/031309.html). > 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: > https://gist.github.com/StephanOpfer/5b9f3f76e6610536078cb9c16072aac9 > > 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 > > Stephan > > > _______________________________________________ > zeromq-dev mailing list > zeromq-dev@lists.zeromq.org > https://lists.zeromq.org/mailman/listinfo/zeromq-dev > > > > > _______________________________________________ > zeromq-dev mailing > listzeromq-dev@lists.zeromq.orghttps://lists.zeromq.org/mailman/listinfo/zeromq-dev > > > _______________________________________________ > zeromq-dev mailing list > zeromq-dev@lists.zeromq.org > https://lists.zeromq.org/mailman/listinfo/zeromq-dev >
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