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BitBake is, at its simplest, a tool for executing tasks and managing metadata. As such, its similarities to GNU make and other build tools are readily apparent. It was inspired by Portage, the package management system used by the Gentoo Linux distribution. BitBake is the basis of the OpenEmbedded project, which is being used to build and maintain a number of embedded Linux distributions/projects such as Angstrom and the Yocto project.