On 2024-03-07 19:47 +0100, Bernd Schubert wrote: > Hi all, > > this is certainly not kind of the mail I was hoping for as a new libfuse > maintainer. > > As you can see from the title and from discussion below (sorry this is > not typical ML discussion style), we have a bit of of problem with > libfuse ABI compatibility.
Oops. > While scanning through git history, Ashley found a commit that was adding > members in the middle of struct - doesn't break API, but binary > compatibility. That commit already landed a year ago in these releases: > > git tag --contains a5eb7f2a0117ab43119ef5724cf5f4f2f181804a > fuse-3.14.1 > fuse-3.15.0 > fuse-3.15.1 > fuse-3.16.1 > fuse-3.16.2 > > Perhaps we should bring in the distro package maintainers here for their > > guidance/input? Like I say I’ve not had experience of this type of issue > > before but I’m sure the distros will have. Looking at https://tracker.debian.org/pkg/fuse and https://tracker.debian.org/pkg/fuse3 It looks like Debian (and thus most debian-derived distros) has not yet moved past 3.14.0, so we appear to have narrowly avoided building anything using the broken ABI. So a revert to the old ABI in 3.17 along with advice not to use 3.14.1-3.16.x would work fine for us. I have no particular expertise in libfuse, so I don't know if somehow the offending commit has been included depsite the version numbers. https://sources.debian.org/src/fuse3/3.14.0-5/debian/patches/ suggests not. Hopefully the maintainer will weigh in on this. So I don't think we care whether you revert or do a soname bump - that's something you need to decide based on the fallout elsewhere in the ecosystem. I have no idea how many people/groups/distros/softwares are following fuse development more closely and thus have already got 'wrong' binaries. A soname bump is probably your best bet, but if no-one even noticed this for a year then maybe it's not that bad and just reverting will suffice? (And send everyone on a crash course about ABIs and struct padding!) Wookey -- Principal hats: Debian, Wookware, ARM http://wookware.org/
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