-- OpenCV 2 not found.
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
OpenCV2_IMAGE_CODECS_LIBRARY (ADVANCED)
    linked by target "dieToy" in directory /home/mcmaster/doc/ext/die-toy
OpenCV2_OPTFLOW_LIBRARY (ADVANCED)
    linked by target "dieToy" in directory /home/mcmaster/doc/ext/die-toy

-- Configuring incomplete, errors occurred!
See also "/home/mcmaster/doc/ext/die-toy/CMakeFiles/CMakeOutput.log".