Removed system include directories
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
Referring to this:
http://vtk.org/gitweb?p=VTK.git;a=commit;h=514405b8d9854a28e0f4962ea6cf53af00f71b66
I'm not sure that this change is a good idea. I don't see why I should look myself for X11 include dirs when using VTK_USE_FILE and including, say, vtkXOpenGLRenderWindow.h. In my opinion, VTK_USE_FILE should be enough to bring in all include paths needed to compile all VTK headers.
This is probably a non-issue on Linux, where almost all include files are in /usr/include which is automatically brought in by the compiler, but in FreeBSD - where we usually put 3rd party packages' include files in /usr/local/include - this breaks even the simplest VTK project.
I suggest backing off this change. Feedback is welcome.