I've had access to the GCC Compile Farm for testing on various architectures for a while. Around the 2.19.0 release I submitted some patches / bug reports found there.
I've now improved this to run it via GitLab CI & made the output accessible. Outline of how this works at https://gitlab.com/git-vcs/git-gitlab-ci/commit/497805b18f https://gitlab.com/git-vcs/git-ci/branches is a repo that houses a merge of {master,next,pu} from git.git and that git-gitlab-ci.git repo. There's still plenty of rough edges to it, but https://gitlab.com/git-vcs/git-ci/-/jobs already has some useful results. Right now this is all pushed out manually. But I'm planning to get it to a point where soon after Junio pushes changes out a run will kick off on all these platforms. The machines it's running on & their build / test configuration is also something I set up as a one-off. The full list of available machines is at https://cfarm.tetaneutral.net/machines/list/ and I picked some subset that looked interesting (outlier platforms) at https://gitlab.com/git-vcs/git-gitlab-ci/blob/master/.gitlab-ci.yml
