On Wed, Nov 30, 2022 at 1:25 PM Jeff Davis <pg...@j-davis.com> wrote: > On Wed, 2022-11-30 at 10:52 +1300, Thomas Munro wrote: > > On Wed, Nov 30, 2022 at 8:38 AM Jeff Davis <pg...@j-davis.com> wrote: > > > On Tue, 2022-11-29 at 10:46 -0800, Jeff Davis wrote: > > > https://unicode-org.atlassian.net/browse/ICU-22216 > > > > I'm no expert on loader/linker arcana but I have a feeling this is a > > dead end. It's an ancient Unix or at least elf-era Unix convention > > that SONAMEs have major versions only, because major versions are the > > basis of ABI stability. > > It's possible that it's more a problem of how they are doing it: the > specific version is coming from a dependency rather than the library > itself. The results are surprising, so I figured it's worth a report. > Let's see what they say. > > Regardless, even if they did make a change, it's not going to help us > anytime soon. We can't rely on any scheme that involves multiple minor > versions for a single major version being installed at once. That means > that, if you create a collation depending on ICU X.Y, and then it gets > upgraded to X.(Y+1), and you create another collation depending on that > library version, you are stuck.
Mainstream package maintainers aren't going to let that happen anyway as discussed, so this would always be a fairly specialised concern. Maybe someone in our community would be motivated to publish a repo full of mutant packages that don't conflict with each other and that have specially modified DT_NEEDED, or are rolled into one single library so the DT_NEEDED problem goes away.
