Debug：libvtkRenderingPythonTkWidgets.so does not exist

问题描述 ubnuntu18用apt装完VTK后，其它工程中带了VTK库的，编译时会报上面这个警告Warning: libvtkRenderingPythonTkWidgets.so does not exist，或者是像下面这个长警告：

The imported target "vtkRenderingPythonTkWidgets" references the file
   "/usr/lib/x86_64-linux-gnu/libvtkRenderingPythonTkWidgets.so"
but this file does not exist.  Possible reasons include:
* The file was deleted, renamed, or moved to another location.
* An install or uninstall procedure did not complete successfully.
* The installation package was faulty and contained
   "/usr/lib/cmake/vtk-6.3/VTKTargets.cmake"
but not all the files it references.

-- The imported target "vtk" references the file
   "/usr/bin/vtk"
but this file does not exist.  Possible reasons include:
* The file was deleted, renamed, or moved to another location.
* An install or uninstall procedure did not complete successfully.
* The installation package was faulty and contained
   "/usr/lib/cmake/vtk-6.3/VTKTargets.cmake"
but not all the files it references.

问题解决 安装python-vtk6后，建立一个软连接：

sudo ln -s /usr/lib/python2.7/dist-packages/vtk/libvtkRenderingPythonTkWidgets.x86_64-linux-gnu.so /usr/lib/x86_64-linux-gnu/libvtkRenderingPythonTkWidgets.so

再次编译相关工程，就不会再报上面这个警告了。