> Have you ever tried building GCC? I've wasted days on it and in the end still failed to make it work.

I've hand-built GCC for half a dozen of different target architectures over the years and it's perhaps one of the most stable pieces of software when it comes to building it. I've only had one build failure over the years and that was unstable from git (even that usually works no problem).

To build GCC, follow the simple steps on the GCC manual. With a modern fast computer, it's all done in an hour or two (of mostly waiting).