Fix GHC 9.10 literate haskell support for musl64 (#2259)

* Add test for literate-haskell

* Fix literate haskell for musl64 and ghc 9.10

Author: hamishmack

builder/ghc-for-component-wrapper.nix

@@ -126,6 +126,7 @@ let
 
   ''
   + lib.optionalString (stdenv.targetPlatform.isMusl && !haskellLib.isNativeMusl && builtins.compareVersions ghc.version "9.9" >0) ''
+     ln -s $wrappedGhc/bin/${targetPrefix}unlit $wrappedGhc/bin/unlit
      ln -s $wrappedGhc/bin/${ghcCommand}-iserv $wrappedGhc/bin/ghc-iserv
      ln -s $wrappedGhc/bin/${ghcCommand}-iserv-prof $wrappedGhc/bin/ghc-iserv-prof
   ''

test/default.nix

@@ -234,6 +234,7 @@ let
     supported-languages = callTest ./supported-langauges {};
     js-template-haskell = callTest ./js-template-haskell {};
     gi-gtk = callTest ./gi-gtk { inherit util; };
+    literate-haskell = callTest ./literate-haskell {};
     unit = unitTests;
   };
 

test/literate-haskell/default.nix

@@ -0,0 +1,19 @@
+{ stdenv, lib, project', haskellLib, recurseIntoAttrs, testSrc, compiler-nix-name, evalPackages }:
+
+with lib;
+
+let
+  project = project' {
+    inherit compiler-nix-name evalPackages;
+    src = testSrc "literate-haskell";
+  };
+
+  packages = project.hsPkgs;
+
+in recurseIntoAttrs {
+  ifdInputs = {
+    inherit (project) plan-nix;
+  };
+
+  build = packages.literate-haskell.components.library;
+}

test/literate-haskell/literate-haskell.cabal

@@ -0,0 +1,16 @@
+cabal-version:      3.0
+name:               literate-haskell
+version:            0.1.0.0
+category:           Repro
+build-type:         Simple
+
+common warnings
+    ghc-options: -Wall
+
+library
+    import:           warnings
+    exposed-modules:  MyLib
+    build-depends:    base
+    hs-source-dirs:   src
+    default-language: Haskell2010
+

test/literate-haskell/src/MyLib.lhs

@@ -0,0 +1,7 @@
+\begin{code}
+
+module MyLib (x) where
+
+x=1
+
+\end{code}