[CMake] CMake 2.8.2 going crazy on my 'Superbuild Project'

[kent williams]

Problem solved -- in what may have been an Emacs mishap, the entire
CMakeLists.txt got included twice.  The post-2.4 CMake pickiness
caught the problem, but not knowing that I'd somehow duplicated the
entire contents of the file, I was faced with utterly baffling error
messages. I even thought when I looked at it 'it looks like it's
including the CMakeLists.txt twice!'