Different components of OpenEmbedded are under different licenses (a mix of MIT and GPLv2). See LICENSE.GPL-2.0-only and LICENSE.MIT for further details of the individual licenses. All metadata is MIT licensed unless otherwise stated. Source code included in tree for individual recipes (e.g. patches) are under the LICENSE stated in the associated recipe (.bb file) unless otherwise stated. License information for any other files is either explicitly stated or defaults to GPL version 2 only. Individual files contain the following style tags instead of the full license text to identify their license: SPDX-License-Identifier: GPL-2.0-only SPDX-License-Identifier: MIT This enables machine processing of license information based on the SPDX License Identifiers that are here available: http://spdx.org/licenses/