Size reduction technique with Yocto Project by Khem Raj

While default images generated by Yocto Project build system are small inherently due to conscious design choices and fact we are building from bottom up, it is not fully optimized for size. The build system is generic and therefore can be leveraged by power users to apply specific customization to effect reduction in image size, usually we think size reduction is using -Os compiler option, but in reality this is only a small portion of the whole image size reduction, there are other ways to effect this change. In addition Yocto Project provide these tools which can be used to optimize the images for size.