Montavista Software, LLC. release of beaglebone.

git clone --recursive https://github.com/MontaVista-OpenSourceTechnology/opencgx-beaglebone-4.14-2.4
cd opencgx-beaglebone-4.14-2.4
source setup.sh

By default, the script will create a project called project, you may change this by adding the directory name you would like to use on the source line:

source setup.sh <my directory>

After running the top level setup.sh, you are ready to build. When starting another session, you can source the setup.sh script in the project directory to get started. This script will automatically source the environment for the build tools stored under buildtools, and sources the poky/oe-init-build-env script.

From that point, the project should work like any other yocto based build system. So a command like the following will build images.

cd project
or
cd <my directory>
source setup.sh
bitbake core-image-minimal 

For additional information see the yocto documentaion: https://www.yoctoproject.org/docs/

opencgx-beaglebone-4.14-2.4/
       project - bitbake project for the beaglebone project build
       buildtools - build tools to provide minimal build requirement for poky builds
       layers - layers for building beaglebone project
       setup.sh - project setup script  

The default MACHINE is beaglebone.