Comment by kingkilr
3 days ago
(pyca/cryptography dev here)
As Steve notes, Rust does support s390x. Even prior to shipping Rust code, we never tested or claimed to support s390x.
If there's genuine interest in more people supporting s390x in the open source world, folks will need to do the work to make it possible to build, test, and run CI on it. IBM recently contributed official PPC64le support to pyca/cryptography (by way of Github Actions runners so we could test and build in CI), and they've been responsive on weird platform issues we've hit (e.g., absl not support ppc64le on musl: https://github.com/pyca/infra/pull/710#issuecomment-31789057...). That level of commitment is what's really required to make a platform practical, treating "well, it's in C and every platform has a C compiler" as the sum total of support wasn't realistic.
If you don't mind, how did you get into cryptography development? I have heard many say that don't do this unless you're experienced but I wonder how one becomes more experienced if you don't do it by yourself.