[vtkusers] vtkStandardNewMacro problems with MSVC9

[Karthik Krishnan]

You must explicitly export the classes and the global functions
to be made publicly accessible.

You need to define your own mylibrary_EXPORT directive with a
line similar to what is done in VTK

Create a file myLibraryConfigure.h.in and configure it..
The file will have a line such as
  #cmakedefine MyLibrary_BUILD_SHARED_LIBS

include this file from another file you will create myLibarys.h

#if defined(_WIN32) && defined(MyLibrary_BUILD_SHARED_LIBS)
# if defined(MyLibrary_EXPORTS)
#  define MyLibrary_EXPORT __declspec( dllexport )
# else
#  define MyLibrary_EXPORT __declspec( dllimport )
# endif
#else
# define MyLibrary_EXPORT
#endif

include this file from all the headers in your library and prefix them
with MyLibrary_EXPORT.

And set MyLibrary_BUILD_SHARED_LIBS to whatever BUILD_SHARED_LIBS
is in your CMakeLists.txt.

Assuming you have a ADD_LIBRARY when adding the files to your
lib, mylibrary_EXPORTS will be defined by cmake so that you can know whether
they are being included from inside their library our outside to
properly setup dllexport/dllimport decorations.


On Fri, Oct 17, 2008 at 6:30 PM, Dominik Szczerba <dominik at itis.ethz.ch> wrote:
> I am building it externally, without recompiling VTK (5.2.0).
>
> DSZ
>
> On Saturday 18 October 2008 12:24:11 am Francois Bertel wrote:
>> Where are you putting this class? in VTK/Graphics or in some external
>> project?
>>
>> On Fri, Oct 17, 2008 at 6:16 PM, Dominik Szczerba <dominik at itis.ethz.ch>
> wrote:
>> > Yea I had a detailed look at vtkWin32Header.h and it should do as you say
>> > - and as I do.
>> > Looks to me like this is somehow broken with MSVS 9 2008 on derived
>> > classes - was it tested with the new version?
>> >
>> > with regards,
>> > Dominik
>> >
>> > On Saturday 18 October 2008 12:09:47 am Dominik Szczerba wrote:
>> >> I am using:
>> >>
>> >> class VTK_GRAPHICS_EXPORT vtkThreshold2 : public
>> >> vtkUnstructuredGridAlgorithm ...
>> >>
>> >> and I thought VTK_GRAPHICS_EXPORT does what you say, or do I miss
>> >> anything?
>> >>
>> >> Dominik
>> >>
>> >> On Friday 17 October 2008 11:49:03 pm Karthik Krishnan wrote:
>> >> > My guess is that you might be trying to use the classes on
>> >> > windows without exporting them... the __declspec(dllimport) /
>> >> > export thingie.
>> >> >
>> >> > You must explicitly export the classes and the global functions
>> >> > to be made publicly accessible.
>> >> >
>> >> > See how VTK_FILTERING_EXPORT is used for instance... On unix,
>> >> > this expands to nothing.
>> >> >
>> >> > On Fri, Oct 17, 2008 at 5:41 PM, Dominik Szczerba
>> >> > <dominik at itis.ethz.ch>
>> >>
>> >> wrote:
>> >> > > Compiling and linking to standard VTK classes work fine.
>> >> > >
>> >> > > As soon as I start using my own algorithms (e.g. derived from
>> >> > > vtkUnstructuredGridAlgorithm) I get linking problems about
>> >> > > unresolved New(), which I trace down to vtkStandardNewMacro. I see
>> >> > > this macro goes very deep and suggests that so created objects must
>> >> > > be somehow registered, but on linux the same code works just fine.
>> >> > > What am I doing wrong?
>> >> > >
>> >> > > with regards,
>> >> > > Dominik
>> >> > > --
>> >> > > Dominik Szczerba, Ph.D.
>> >> > > Computational Physics Group
>> >> > > Foundation for Research on Information Technologies in Society
>> >> > > http://www.itis.ethz.ch
>> >> > > _______________________________________________
>> >> > > This is the private VTK discussion list.
>> >> > > Please keep messages on-topic. Check the FAQ at:
>> >> > > http://www.vtk.org/Wiki/VTK_FAQ Follow this link to
>> >> > > subscribe/unsubscribe:
>> >> > > http://www.vtk.org/mailman/listinfo/vtkusers
>> >
>> > --
>> > Dominik Szczerba, Ph.D.
>> > Computational Physics Group
>> > Foundation for Research on Information Technologies in Society
>> > http://www.itis.ethz.ch
>> > _______________________________________________
>> > This is the private VTK discussion list.
>> > Please keep messages on-topic. Check the FAQ at:
>> > http://www.vtk.org/Wiki/VTK_FAQ Follow this link to
>> > subscribe/unsubscribe:
>> > http://www.vtk.org/mailman/listinfo/vtkusers
>
>
>
> --
> Dominik Szczerba, Ph.D.
> Computational Physics Group
> Foundation for Research on Information Technologies in Society
> http://www.itis.ethz.ch
> _______________________________________________
> This is the private VTK discussion list.
> Please keep messages on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>



-- 
Karthik Krishnan
R&D Engineer,
Kitware Inc.
Ph: 518 371 3971 x119
Fax: 518 371 3971