On Wed, Nov 12, 2025 at 2:54 AM Zubin Duggal <zubin@well-typed.com> wrote:

Can you open a ticket for this please?

On 25/11/11 14:17, George Colpitts wrote:
>Thanks Zubin. I found a small problem; hopefully it is unique to me:
>
> % ghc --version
>The Glorious Glasgow Haskell Compilation System, version 9.12.2.20251110
>
>% ghc -O2 -fllvm prob214ff.hs
>Loaded package environment from
>/Users/gcolpitts/.ghc/aarch64-darwin-9.12.2.20251110/environments/default
>[1 of 2] Compiling Main ( prob214ff.hs, prob214ff.o ) [Missing
>object file]
><no location info>: warning: [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 ensure -fllvm works
>
>
><no location info>: error:
> Warning: Couldn't figure out LLVM version!
> Make sure you have installed LLVM between [13 and 20)
>
>
>Failed to detect LLVM version!
>Make sure LLVM is installed correctly.
>We will try though...
><no location info>: error: LLVM Optimiser: could not execute:
>
>Although llvm 21 is not supported my understanding is that it is supposed
>to try as it says above. I do have llvm installed:
>
> opt --version
>Homebrew LLVM version 21.1.5
> Optimized build.
> Default target: arm64-apple-darwin25.1.0
> Host CPU: apple-m4
>(base) gcolpitts@Mac haskell %
>
>Plus configure also thinks I have it installed:
>
>checking for llc... llc
>checking llc version (21.1.5) is between 13 and 20... no
>configure: We only support llvm 13 upto 20 (non-inclusive) *(found 21.1.5).*
>checking for opt-19... no
>checking for opt-19.0... no
>checking for opt19... no
>checking for opt-18... no
>checking for opt-18.0... no
>checking for opt18... no
>checking for opt-17... no
>checking for opt-17.0... no
>checking for opt17... no
>checking for opt-16... no
>checking for opt-16.0... no
>checking for opt16... no
>checking for opt-15... no
>checking for opt-15.0... no
>checking for opt15... no
>checking for opt-14... no
>checking for opt-14.0... no
>checking for opt14... no
>checking for opt-13... no
>checking for opt-13.0... no
>checking for opt13... no
>checking for opt... opt
>checking opt version (21.1.5) is between 13 and 20... no
>configure: We only support llvm 13 upto 20 (non-inclusive)
>checking for llc... llc
>checking llc version (21.1.5) is between 13 and 20... no
>configure: We only support llvm 13 upto 20 (non-inclusive) *(found 21.1.5).*
>checking for opt-19... no
>checking for opt-19.0... no
>checking for opt19... no
>checking for opt-18... no
>checking for opt-18.0... no
>checking for opt18... no
>checking for opt-17... no
>checking for opt-17.0... no
>checking for opt17... no
>checking for opt-16... no
>checking for opt-16.0... no
>checking for opt16... no
>checking for opt-15... no
>checking for opt-15.0... no
>checking for opt15... no
>checking for opt-14... no
>checking for opt-14.0... no
>checking for opt14... no
>checking for opt-13... no
>checking for opt-13.0... no
>checking for opt13... no
>checking for opt... opt
>checking opt version (21.1.5) is between 13 and 20... no
>configure: We only support llvm 13 upto 20 (non-inclusive) *(found 21.1.5).*
>
>Suggestions?
>
>Thanks
>George
>
>
>On Tue, Nov 11, 2025 at 4:02 AM Zubin Duggal <zubin@well-typed.com> wrote:
>
>> The GHC developers are very pleased to announce the availability
>> of the second release candidate for GHC 9.12.3. Binary distributions,
>> source
>> distributions, and documentation are available at [downloads.haskell.org][]
>> and
>> via [GHCup](https://www.haskell.org/ghcup/).
>>
>> GHC 9.12.3 is a bug-fix release fixing several issues of a variety of
>> severities and scopes. A full accounting of these fixes can be found in the
>> [release notes][]. As always, GHC's release status, including planned
>> future
>> releases, can be found on the GHC Wiki [status][].
>>
>> This release candidate will have a two-week testing period. If all goes
>> well
>> the final release will be available the week of 24 November 2025.
>>
>> The changes from the first release candidate are
>>
>> * Fix a regression resulting in a panic with empty cases (#26442, #25960).
>> * Fix for a potential segfault in the bytecode interpreter (#23210).
>> * Fix for a regression with tabs not being allowed in string gaps (#26415).
>> * Fix for a crash with the non-moving GC (#26204).
>> * A rework of how internal symbols used by the code-generator are handled
>> to
>> adapt to changes in the Apple toolchain, enabling this release to
>> bootstrap on
>> macOS 26 Tahoe (#26166).
>>
>> GHC development is sponsored by:
>>
>> * [Juspay](https://juspay.com/)
>> * [QBayLogic](https://qbaylogic.com/)
>> * [Channable](https://www.channable.com/)
>> * [Haskell Foundation](https://haskell.foundation/)
>> * [Serokell](https://serokell.io/)
>> * [Well-Typed](https://well-typed.com/)
>> * [Tweag](https://www.tweag.io/)
>> * [Dotcom-Monitor](https://www.dotcom-monitor.com/)
>> * [LoadView](https://www.loadview-testing.com/)
>> * [Web Hosting Buddy](https://webhostingbuddy.com/)
>> * [Find My Electric](https://www.findmyelectric.com/)
>> * [Standard Chartered](https://www.sc.com)
>> * [UpCloud](https://upcloud.com)
>>
>> We would like to that these sponsors and other anonymous contributors
>> whose on-going financial and in-kind support has facilitated GHC
>> maintenance
>> and release management over the years. Finally, this release would not have
>> been possible without the hundreds of open-source contributors whose work
>> comprise this release.
>>
>> As always, do give this release a try and open a [ticket][] if you see
>> anything amiss.
>>
>> [release notes]:
>> https://gitlab.haskell.org/ghc/ghc/-/blob/ghc-9.12/docs/users_guide/9.12.3-notes.rst?ref_type=heads&plain=1
>> [status]: https://gitlab.haskell.org/ghc/ghc/-/wikis/GHC-status
>> [downloads.haskell.org]: https://downloads.haskell.org/ghc/9.12.3-rc2
>> [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new
>> _______________________________________________
>> ghc-devs mailing list -- ghc-devs@haskell.org
>> To unsubscribe send an email to ghc-devs-leave@haskell.org
>>