Patches for 9.12 for reinstallable libraries to build #2441
      
        
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fixed #2432
not sure if this is how you'd like to do but since there was already a patch for Cabal-3.11 and ghc-9.10 I took this as reasonable method
the alex patch comes from a ghc MR so should not be needed in future https://gitlab.haskell.org/ghc/ghc/-/merge_requests/13782
the Cabal one is inspired by the patch already applied for 9.10 to build with Cabal-3.11
the Setup files in ghc master still don't support 3.14 so i guess 9.14 will need to apply the patch too when supported