What version has official GHC2024 support?

[quantum9Innovation]

#9736 is closed, but I'm not sure if it's been released. I am using cabal 3.12.1.0 and I get an error in my project rejecting: project-0.1.0.0 (conflict: requires GHC2024 which is not supported) when I attempt to build with GHC2024.

[ffaf1]

Which GHC version are you compiling your project with? ≥9.10?

[ffaf1]

f@x270:/tmp/prova$ grep language prova.cabal
    default-language: GHC2024
f@x270:/tmp/prova$ cabal --version
cabal-install version 3.12.1.0
compiled using version 3.12.1.0 of the Cabal library
f@x270:/tmp/prova$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 9.10.1
f@x270:/tmp/prova$ cabal clean
f@x270:/tmp/prova$ cabal build
Resolving dependencies...
Build profile: -w ghc-9.10.1 -O1
In order, the following will be built (use -v for more details):
 - prova-0.1.0.0 (exe:prova) (first run)
Configuring executable 'prova' for prova-0.1.0.0...
Preprocessing executable 'prova' for prova-0.1.0.0...
Building executable 'prova' for prova-0.1.0.0...
[1 of 1] Compiling Main             ( app/Main.hs, /tmp/prova/dist-newstyle/build/x86_64-linux/ghc-9.10.1/prova-0.1.0.0/x/prova/build/prova/prova-tmp/Main.o )
[2 of 2] Linking /tmp/prova/dist-newstyle/build/x86_64-linux/ghc-9.10.1/prova-0.1.0.0/x/prova/build/prova/prova
f@x270:/tmp/prova$

Are you sure for some reason (cabal.project, freeze file, etc.) cabal is not selecting an older GHC? You can check the Build profile: to make sure.

[quantum9Innovation]

Thanks for this! I was actually using cabal pulled from nixpkgs, which I thought was fixed to 9.10.1, but it seems the latest ghc package available is 9.8.4, which does not support GHC2024. I had to use the haskell.compiler.ghc910 package to fix the version of ghc to one that supports GHC2024.