On Thu, Jan 29, 2026, at 9:32 AM, Emilio Pozuelo Monfort wrote: > Package: rustc > Version: 1.91.1+dfsg1-1 > Severity: normal > > Hi, > > rustc includes a script, debian/make_orig-stage0_tarball.sh, to create a > stage0.orig.tar.xz that can be used to bootstrap rustc. I don't think that's > used much, since new updates in Debian sid will use X-1 from sid to build. > However, when uploading a (much newer) version to (old)stable, we don't have > X-1, so we need to create and use a -stage0 tarball.
It is mainly used for rebootstrapping when ports/archs get out of sync. But I guess that might also have fallen out of favor with cross builds mostly working nowadays. > The issue I find is that upstream doesn't support some of our release > architectures, so when doing these backports, we lack a way to bootstrap the > new version on those architectures. See for example [1]. Yes. > One possibility would be to create the -stage0 tarballs using Debian > sid packages > for X-1. I haven't looked in detail, but perhaps we would need > statically linked > binaries, which could be done in an extra build and placed in a > rust-static .deb. > Then make_orig-stage0_tarball could look for those .debs from > snapshot.debian.org. > > Thoughts? I think for builds using those stage0 tarballs targeting stable we have three options: - build a static variant on every unstable upload - provide a script that cross-builds the missing stage0 targets (either using upstream build, or using an arch that has an upstream stage0 as starting point by doing a cross package build?) - use backports packages as stage0 input I think I'd favor the latter, since I already do the work for those ;) In recent history I think libgit2 was the only library pulled in that I had to backport as well (that was for Bookworm and for unofficial backports). It maybe would have been possible to avoid that by patching more aggressively. Of course, that would *only* help for Trixie, not Bookworm or older. If you need to support those, only the static or cross build variants would work at at the moment. Fabian
