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 <[email protected]
<mailto:[email protected]>> 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
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