I think you misunderstand the alternatives system. It's used for things that are much more different then simply ABI or API changes. It selected completed different applications, Unity VS Gnome VS KDE. The show stopper for alternatives is at X vs console applications, now if llvm-3.2 was a console app and llvm-3.1 was an X app then yes alternatives would seem inappropriate. However I'd say try and see if there is a problem, you can always have an alternative for the x and console only variants.
Here are some examples of alternatives that change ABI and API as well as the user interface drastically: x-window-manager mozilla-flashplugin x-terminal-emulator www-browser x-www-browser ** Changed in: llvm-3.1 (Ubuntu) Status: Invalid => New ** Changed in: llvm-3.2 (Ubuntu) Status: Invalid => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/991493 Title: Missing llvm-config alternatives. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/llvm-3.1/+bug/991493/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs