support GHC 9.4.4

[peterbecich]

checked with

 nix-build scripts/check-compiler-materialization --argstr compiler-nix-name ghc944

[TeofilC]

I'm getting these warnings when using this MR:

trace: WARNING: No materialized dummy-ghc-data.  mkdir /nix/store/awz5pj0w14x7grvvc29caflkdlipr4ak-source/materialized/dummy-ghc/ghc-9.4.4-x86_64-linux
trace: WARNING: No materialized dummy-ghc-data.  mkdir /nix/store/awz5pj0w14x7grvvc29caflkdlipr4ak-source/materialized/dummy-ghc/ghc-9.4.4-x86_64-linux

I guess that script must not check for them

[ken-scarf]

What's the usual step for updating ghc? Is it updating modules/component-driver.nix and overlays/bootstrap.nix, then materializing it?

[peterbecich]

@ken-scarf , yes I think that's all that's needed, maybe we should add component-driver.nix here: https://input-output-hk.github.io/haskell.nix/dev/adding-new-ghc.html

[peterbecich]

Can someone look at this if convenient? It may assist with GHC 9.4.4

iserv-proxy missing for GHC 9.4.3 #1807

I think the fix may be here:

haskell.nix/overlays/ghc-packages.nix

Lines 75 to 81 in 4d64854

	} // final.lib.optionalAttrs (builtins.compareVersions ghcVersion "9.4" < 0) {
	# The version of `Win32` that comes with ghc 9.4 (2.12.0.0) is older
	# than the one in hackage. Including it causes `cabal configure` to fail.
	Win32 = "libraries/Win32";
	# As of GHC 9.4 this has been split out of the GHC repo and
	# is now in the iserv-proxy flake input
	iserv-proxy = "utils/iserv-proxy";

[peterbecich]

I'm not sure what to do about #1822 (comment)

[TeofilC]

I am optimistic that the iserv-proxy issue might be fixed by #1814 but I'm not sure -- at least it looks like it touches code to do with iserv-proxy

[TeofilC]

I've made a commit to add the materialised dummy ghc for x86_64-linux here: TeofilC@f0e3cad

I'll see if I can generate the other ones but I'm not sure if I'll be able to do it on my machine