gcc-mirror/gcc ? reverse-engineered prompt

I want to build GCC from source on my machine and get a working compiler installed.

Please help me set it up from this repo, run whatever configure and build steps are needed, and make sure the install works cleanly. If there are any missing system dependencies or common gotchas for building GCC, check the current docs online if you need to and handle them for me. I’d also like a simple way to verify the build worked, like compiling a tiny C or C plus plus program after installation.

If the repo has multiple targets or options, choose the sensible default for a normal local development setup and keep the process as straightforward as possible.