rofiles-fuse: does not compile with musl (v2024.4)

[YukariChiba]

I noticed that 4d95848 introduced statx which is not supported by musl.

To reproduce, compile ostree v2024.4 with any musl-based distro (e.g, alpine).

[cgwalters]

Hmm, messy. I wonder if musl users care about rofiles-fuse? Hmm, looks like flatpak-builder uses it.

Well, this is a bit painful as the code is significantly cleaner with statx...

And OK wow, where is the issue tracker for musl? (OK, some digging through the mail-archives-as-bug-tracker leads to https://www.openwall.com/lists/musl/2020/01/19/7 so we're hardly the first to hit this pain)

[cgwalters]

Per https://lwn.net/Articles/964181/

On February 29, the musl project announced release 1.2.5, including support for loongarch64 and riscv32. This release also contains support for the statx(), preadv2(), and pwritev2() system calls.

So...dunno. I guess my inclination here is to recommend that musl users carry a downstream patch to revert the commits in #3175
until such time as they can update to the new musl.

And I guess we need to add a CI job here that covers alpine.

[YukariChiba]

It's been a while since musl 1.2.5 was released. It's basically a non-issue now.