Yocto is the most famous "build system" for embedded Linux. During this conference we'll study how to use some Yocto features to help the development of a free industrial project. We will study the eSDK (extended cross-toolchain), Ptest and Testimage (CI), Devtool and Devshell (recipe modification). We will also learn how to be in compliance with the GPLv3 / LGPLv3 licenses thanks to the "archiver" class (and more).