[Paraview] VTK_IO_EXPORT vs VTK_EXPORT (VTK_ABI_IMPORT vs VTK_ABI_EXPORT)

[Xunlei Wu]

Hi All,

Could anyone please explain the difference between VTK_IO_EXPORT and VTK_EXPORT (beyond the below definition)? I am writing a file reader plugin and defined my class as VTK_EXPORT. However, many VTK/IO/ reader examples, e.g. vtkAVSucdReader, vtkImageReader are defined as VTK_IO_EXPORT. From the source code,

#define VTK_EXPORT VTK_ABI_EXPORT

#if defined(vtkIO_EXPORTS)
  #define VTK_IO_EXPORT VTK_ABI_EXPORT
#else
  #define VTK_IO_EXPORT VTK_ABI_IMPORT
#endif

Thanks for your help.

Best,
xunlei
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