ref: 74f8a126328fa9487295a3170a743695b3d86093
dir: /external/SDL2/src/hidapi/LICENSE.txt/
HIDAPI can be used under one of three licenses. 1. The GNU General Public License, version 3.0, in LICENSE-gpl3.txt 2. A BSD-Style License, in LICENSE-bsd.txt. 3. The more liberal original HIDAPI license. LICENSE-orig.txt The license chosen is at the discretion of the user of HIDAPI. For example: 1. An author of GPL software would likely use HIDAPI under the terms of the GPL. 2. An author of commercial closed-source software would likely use HIDAPI under the terms of the BSD-style license or the original HIDAPI license.