Filed https://gitlab.haskell.org/ghc/ghc/-/issues/25915
On Tue, Apr 1, 2025 at 2:11 PM Andreas Klebinger via ghc-devs < ghc-devs@haskell.org> wrote: > Looking at https://gitlab.haskell.org/ghc/ghc/-/issues/25011 it seems the > desire was to fail with a proper error when LLVM was not found at all. > > To me failing when the llvm version is too new seems like a unintended > side effect of fixing the former. > > I agree that simply warning and trying anway is the better default. A > ticket would be appreciated! > Am 01/04/2025 um 19:05 schrieb George Colpitts: > > I was trying to find out if it works but I ran into the problem I > described. Yes, there were a few years where the latest version didn't work > but in many years it did. ghc used to give a warning, this is an > unsupported version but we'll try it anyways. I would like to return to > that. > > In any case I believe ghc dev should test to see if it works and if so use > it in HEAD. If it doesn't work than we should file a bug and fix it. In the > past we got a few versions behind llvm. I think we want to be on the latest > version available for each new release if possible. The earlier we look > into this the more chance we have to succeed at that. > > On Tue, Apr 1, 2025 at 1:27 PM Brandon Allbery <allber...@gmail.com> > wrote: > >> Have you demonstrated that it works? IIRC the current behavior is because >> some LLVM version (16, IIRC) didn't work with GHC (threw errors from opt, I >> think). >> >> On Tue, Apr 1, 2025 at 10:49 AM George Colpitts < >> george.colpi...@gmail.com> wrote: >> >>> llvm 20 is out but unlike in earlier versions of ghc moving to it means >>> you can no longer use llvm: >>> >>> compiling: >>> >>> ghc -fllvm hello.hs >>> Loaded package environment from >>> /Users/avie/.ghc/aarch64-darwin-9.12.2/environments/default >>> [1 of 2] Compiling Main ( hello.hs, hello.o ) >>> <no location info>: error: [GHC-66599] >>> GHC was not configured with a supported LLVM toolchain >>> Make sure you have installed LLVM between [13 and 20) and reinstall >>> GHC to make -fllvm work >>> >>> >>> from configure: >>> >>> configure: We only support llvm 13 upto 20 (non-inclusive) (found >>> 20.1.1). >>> >>> >>> Can we move to llvm 20 on HEAD and can we revert to the old behavior on >>> ghc 9.12.3? >>> >>> Should I file an ER? >>> >>> Thanks >>> >>> _______________________________________________ >>> ghc-devs mailing list >>> ghc-devs@haskell.org >>> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs >>> >> >> >> -- >> brandon s allbery kf8nh >> allber...@gmail.com >> > > _______________________________________________ > ghc-devs mailing > listghc-devs@haskell.orghttp://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs > > _______________________________________________ > ghc-devs mailing list > ghc-devs@haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs >
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