[odb-users] Error creating multi-database query support code with objects containing composite values in Visual Studio 2010/2013 (MSVC)

[Harald Frostel]

Hi Boris,
 
thank you very much for the quick fix!
I would be interested in the pre-release binary. My platform is Windows x64.
 
Thanks!
Harald
 
 
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Dipl.-Ing. Harald Frostel
Department of Computational Perception
Johannes Kepler University Linz
Altenberger Strasse 69
A-4040 Linz, Austria	    
 
Tel:  +43 732 2468 1521
Fax:  +43 732 2468 1520
Mail: harald.frostel at jku.at
http://www.cp.jku.at/people/frostel
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>>> Boris Kolpackov <boris at codesynthesis.com> 17.01.2014 11:57 >>>
Hi Harald,

Ok, I've managed to fix this. I can build you a pre-release binary of
the ODB compiler if you would like to test the fix. Just let me know
which platform/architecture you are using.

For those interested in the gory details, here is some background on
the problem/fix from the git log:

    A composite value is represented in query_columns as a nested struct.
    Even though the query_columns template instantiation is exported, VC++
    for some reason doesn't appear to also export the nested structs. To
    work around this, nested structs have to have the export macro in the
    declaration. But that's not it: we also have to declare the nested
    structs extern, just like the outer template instantiation itself.

Boris