http://bugzilla.opensuse.org/show_bug.cgi?id=1175983 http://bugzilla.opensuse.org/show_bug.cgi?id=1175983#c3 Aaron Puchert <aaronpuchert@alice-dsl.net> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |WONTFIX --- Comment #3 from Aaron Puchert <aaronpuchert@alice-dsl.net> --- (In reply to Ulrich Windl from comment #2)
Screenshot when trying to upgrade clang-devel from 7.01 to 9.01 in YaST Thanks, that's the info I needed.
(In reply to Aaron Puchert from comment #1)
If you need to keep one of those llvm7 subpackages, you can't have llvm-devel 9.
Two issues with that: Aren't the package names "clang7" vs. "clang9" chosen to _allow_ co-existance of both versions? Yes, and you can have both clang7 and clang9 installed. Similarly for llvmX, and obviously libclangX and libLLVMX. But devel packages of different versions can generally not coexist: they contain header files (what should "#include <clang-c/Index.h>" do when multiple versions are installed?) and an unversioned symlink like libclang.so -> libclang.so.9, for example. That's needed to make "-lclang" on the linker command line work. So we can have only one.
The other thing is llvmX-gold and llvmX-polly. These are actually plugins, and are currently unversioned, so they can't coexist. Allowing them to coexist is not trivial unfortunately. For polly we'd need some logic in Clang probably to make sure we pull in the right version, and for the gold plugin I'm actually not sure whether that's passed as an argument by Clang or whether ld.gold chooses that by itself. Given that the package contains a symlink in /usr/lib/bfd-plugins/ I'm suspecting the latter.
And if not, wouldn't "Obsoletes:" package metadata help zypper to resolve the conflict? I'm not sure about that, because LLVM is not backwards-compatible across major versions in some ways. So we are in fact not obsoleting the old packages. If you happen to be interested in Haskell and want to compile ghc with LLVM support, you'll need a specific version, for example. You can't use the newest version.
So if you don't mind I'll close this, because it's mostly expected and with regards to gold and polly hard to change. Of course I'll take patches (ideally if they have landed upstream), but I don't have the time to work on it myself. -- You are receiving this mail because: You are on the CC list for the bug.