[zeromq-dev] Using DRAFT methods of zeromq's build libraries

Luca Boccassi luca.boccassi at gmail.com
Mon Nov 2 21:05:45 CET 2020


On Mon, 2 Nov 2020 at 19:23, Arnaud Loonstra <arnaud at sphaero.org> wrote:
>
> Just a quick question. Would one need to define CZMQ_BUILD_DRAFT_API in
> their own project in order to use the DRAFT methods?
>
> For example using CMake I build the libs like this (paste from appveyor):
>    - cmd: |
>        cd "%LIBZMQ_BUILDDIR%"
>        cmake .. -DBUILD_STATIC=OFF -DBUILD_SHARED=ON
> -DZMQ_BUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX="%INSTALL_PREFIX%"
>        cmake --build . --config %Configuration% --target install
>    - cmd: |
>        cd "%CZMQ_BUILDDIR%"
>        cmake .. -DCZMQ_BUILD_STATIC=OFF -DCZMQ_BUILD_SHARED=ON
> -DCMAKE_PREFIX_PATH="C:\tmp\ci_build" -DCMAKE_INSTALL_PRE
> FIX="%INSTALL_PREFIX%"
>        cmake --build . --config %Configuration% --target install
>
> Draft methods are enabled by default. But when using a draft method I
> get unresolved external symbols (Windows)
>
> This goes away when doing #define CZMQ_BUILD_DRAFT_API before including
> czmq.h.
>
> However I'm questioning this as using make on Linux does not show this
> and I never have needed to define this.
>
> So feature or bug?
>
> Rg,
>
> Arnaud

Yes - this happens automatically on *nix via pkg-config


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