when building VTK with the superbuild VS 2010 might complain about an ambiguous overloaded operator << in VTK build (std::ofstream related for 64 bit types).

solution:

add in Ln 84 in CMake/VTK.cmake
-DVTK_DO_NOT_DEFINE_OSTREAM_SLL:BOOL=ON
-DVTK_DO_NOT_DEFINE_OSTREAM_ULL:BOOL=ON