OpenKinect/libfreenect — comment on commit 8755990eda72a32408a07e803e08932a9e523e16
File: wrappers/opencv/CMakeLists.txt line 4
By zarvox:

This is fine - if you disable BUILD_CV in the root CMakeLists.txt, this whole subdirectory gets ignored.

And presumably, OpenCV *is* required to build the OpenCV wrapper.