[zeromq-dev] Revisited: Example for building against ZMQ with CMake + UDP Multicast Support
Luca Boccassi
luca.boccassi at gmail.com
Wed Sep 26 17:36:27 CEST 2018
In case the base system is missing a dependency, everything that is
needed is shipped in the same repository where the library can be
found, and kept up to date.
Please do not recommend to avoid repositories - it's the preferred form
of distribution for Linux users.
On Wed, 2018-09-26 at 11:22 -0400, Bill Torpey wrote:
> So I guess you could use the static lib, but that may not be ideal.
>
> Personally I’ve had problems with the packaged builds — e.g., the RH
> builds require specific versions of dependent libs that are not
> native to the OS. For that reason, among others, I build libzmq from
> source. That’s not easy either, but at least you know what you’re
> getting.
>
> FWIW, here’s a snip from the build script that I use — you will
> obviously need to make changes for your environment, but it’s a
> start.
>
> # delete old build
> rm -rf build
> mkdir build
> cd build
>
> # do the build
> cmake -DCMAKE_INSTALL_PREFIX=${INSTALL_PREFIX}
> -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} \
> -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
> -DENABLE_DRAFTS=On \
> -DBUILD_STATIC=Off \
> -DWITH_OPENPGM=Off \
> ..
> rc=$?
> [[ $rc != 0 ]] && exit $rc
>
> make ${VERBOSE} && make ${VERBOSE} install
> rc=$?
> [[ $rc != 0 ]] && exit $rc
>
>
> # copy source to facilitate debugging
> mkdir -p ${INSTALL_PREFIX}/src
> cp -rp ../src ${INSTALL_PREFIX}/
>
>
> > On Sep 26, 2018, at 11:10 AM, Stephan again <opfer at vs.uni-kassel.de
> > > wrote:
> >
> > And the static library installed from this repository seems to have
> > the draft api included. Here is the test for that:
> > nm -gC /usr/lib/x86_64-linux-gnu/libzmq.a | grep zmq_msg_group
> >
> > nm: src_libzmq_la-devpoll.o: no symbols
> > nm: src_libzmq_la-gssapi_mechanism_base.o: no symbols
> > nm: src_libzmq_la-gssapi_client.o: no symbols
> > nm: src_libzmq_la-gssapi_server.o: no symbols
> > nm: src_libzmq_la-kqueue.o: no symbols
> > nm: src_libzmq_la-poll.o: no symbols
> > nm: src_libzmq_la-pollset.o: no symbols
> > nm: src_libzmq_la-precompiled.o: no symbols
> > nm: src_libzmq_la-select.o: no symbols
> > nm: src_libzmq_la-vmci.o: no symbols
> > nm: src_libzmq_la-vmci_address.o: no symbols
> > nm: src_libzmq_la-vmci_connecter.o: no symbols
> > nm: src_libzmq_la-vmci_listener.o: no symbols
> > 0000000000000fb0 T zmq_msg_group(zmq_msg_t*) <- matched
> >
> > Kind Regards
> >
> > Stephan
> >
> > On 26.09.2018 17:05, Stephan again wrote:
> > > I Installed it from:
> > >
> > > http://download.opensuse.org/repositories/network:/messaging:/zer
> > > omq:/release-draft/xUbuntu_18.04/
> > > <http://download.opensuse.org/repositories/network:/messaging:/ze
> > > romq:/release-draft/xUbuntu_18.04/>
> > > Hoping that it was compiled accordingly...
> > >
> > > This:
> > > g++ Discovery.cpp /usr/lib/x86_64-linux-gnu/libzmq.a -lpthread
> > > -DZMQ_BUILD_DRAFT_API=1 -DENABLE_DRAFTS=On -o test
> > >
> > > makes it even worth:
> > >
> > > /usr/lib/x86_64-linux-gnu/libzmq.a(src_libzmq_la-socket_base.o):
> > > In function `zmq::socket_base_t::connect(char const*)':
> > > (.text+0x4b26): undefined reference to `pgm_freeaddrinfo'
> > > /tmp/cc62suQj.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/cc62suQj.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/cc62suQj.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'
> > > /usr/lib/x86_64-linux-gnu/libzmq.a(src_libzmq_la-zmq_utils.o): In
> > > function `zmq_curve_keypair':
> > > (.text+0x3e6): undefined reference to `crypto_box_keypair'
> > > /usr/lib/x86_64-linux-gnu/libzmq.a(src_libzmq_la-zmq_utils.o): In
> > > function `zmq_curve_public':
> > > (.text+0x482): undefined reference to `crypto_scalarmult_base'
> > > /usr/lib/x86_64-linux-gnu/libzmq.a(src_libzmq_la-ip.o): In
> > > function `zmq::initialize_network()':
> > > (.text+0x480): undefined reference to `pgm_init'
> > > (.text+0x511): undefined reference to `pgm_error_free'
> > > /usr/lib/x86_64-linux-gnu/libzmq.a(src_libzmq_la-ip.o): In
> > > function `zmq::shutdown_network()':
> > > (.text+0x585): undefined reference to `pgm_shutdown'
> > > /usr/lib/x86_64-linux-gnu/libzmq.a(src_libzmq_la-random.o): In
> > > function `zmq::random_open()':
> > > (.text+0x95): undefined reference to `sodium_init'
> > > /usr/lib/x86_64-linux-gnu/libzmq.a(src_libzmq_la-random.o): In
> > > function `zmq::random_close()':
> > > (.text+0xc1): undefined reference to `randombytes_close'
> > > /usr/lib/x86_64-linux-gnu/libzmq.a(src_libzmq_la-pgm_socket.o):
> > > In function `zmq::pgm_socket_t::init_address(char const*,
> > > pgm_addrinfo_t**, unsigned short*)':
> > > (.text+0x17e): undefined reference to `pgm_getaddrinfo'
> > > (.text+0x26f): undefined reference to `pgm_error_free'
> > >
> > > ....
> > >
> > > Kind Regards
> > >
> > > Stephan
> > >
> > >
> > > On 26.09.2018 16:55, Jake wrote:
> > > > 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 <opfer at vs.uni-ka
> > > > ssel.de <mailto:opfer at 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 <opfer at vs.uni-ka
> > > > > > ssel.de <mailto:opfer at 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
> > > > > > <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/5b9f3f76e6610536078cb9c16072a
> > > > > > ac9
> > > > > > <https://gist.github.com/StephanOpfer/5b9f3f76e6610536078cb
> > > > > > 9c16072aac9>
> > > > > >
> > > > > > 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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> > > > >
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--
Kind regards,
Luca Boccassi
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