As already mentioned, one Linux-based system is a set of several projects, each one under a different license. The Yocto Project helps developers understand that most copyleft project obligations have the following conditions:

• The source code of the project must be provided along with the binary
• The license of the project must be provided along with the binary
• Any modification to the project or any script that is needed to configure and build it must be provided along with the binary

That means that if one project under copyleft is modified, then the license text, the base source code, and any modification must be included in the final deliverable.

The assumptions cover most rights guaranteed by copyleft licenses. These are the parts where the Yocto Project can help us. However, before releasing anything, it is recommended that we audit all the materials to be released to make sure they're complete.