CMake/Modules/VTKCompatibility.cmake

IF(APPLE)
  SET(CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_C_CREATE_SHARED_LIBRARY}")
  SET(CMAKE_CXX_CREATE_SHARED_MODULE "${CMAKE_C_CREATE_SHARED_MODULE}")
  STRING( REGEX REPLACE "CMAKE_C_COMPILER" CMAKE_CXX_COMPILER CMAKE_CXX_CREATE_SHARED_MODULE "${CMAKE_CXX_CREATE_SHARED_MODULE}")
  STRING( REGEX REPLACE "CMAKE_C_COMPILER" CMAKE_CXX_COMPILER CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_CXX_CREATE_SHARED_LIBRARY}")
ENDIF(APPLE)

SET(VTKFTGL_BINARY_DIR "${VTK_BINARY_DIR}/Utilities/ftgl" CACHE INTERNAL "")
SET(VTKFREETYPE_BINARY_DIR "${VTK_BINARY_DIR}/Utilities/freetype" CACHE INTERNAL "")
SET(VTKFTGL_SOURCE_DIR "${VTK_SOURCE_DIR}/Utilities/ftgl" CACHE INTERNAL "")
SET(VTKFREETYPE_SOURCE_DIR "${VTK_SOURCE_DIR}/Utilities/freetype" CACHE INTERNAL "")