In case you're worried this is outdated, note this is for version 10 of gcc (pdf is a pre-release) as stated on the frontpage of the document. I am curious how they plan to keep this updated, I could not easily find the repository for this.
GCC 10 is marked as "prerelease BETA" in my package manager, so I know that this PDF is up-to-date. I was looking to use it as a cheap way to keep track of new developments ;)
