The CMake option ENABLE_PYTHON3 is renamed to ENABLE_PYTHON2, to use Python 2 first then fallback on Python 3. In the same way, the configure option --enable-python3 is renamed to --enable-python2, to use Python 2 first then fallback on Python 3.
The CMake option ENABLE_PYTHON3 is renamed to ENABLE_PYTHON2, to use Python 2 first then fallback on Python 3. In the same way, the configure option --enable-python3 is renamed to --enable-python2, to use Python 2 first then fallback on Python 3.