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[!14772] compiler: allow building with boot compiler that doesn't have ghc-int… #56

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[!14772] compiler: allow building with boot compiler that doesn't have ghc-int… #56

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6 changes: 5 additions & 1 deletion compiler/Setup.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -98,8 +98,12 @@ ghcAutogen verbosity lbi@LocalBuildInfo{pkgDescrFile,withPrograms,componentNameM
_ -> error "Couldn't find unique cabal library when building ghc"

let cGhcInternalUnitId = case lookupPackageName installedPkgs (mkPackageName "ghc-internal") of
-- We assume there is exactly one copy of `ghc-internal` in our dependency closure
-- We assume there is exactly one copy of `ghc-internal` in our dependency closure for
-- ghc >= 9.10 that have the ghc-internal library.
[(_,[packageInfo])] -> unUnitId $ installedUnitId packageInfo
-- for ghc < 9.10 we expect to find none.
[] -> "<unavailable>"
-- for anything else this is an issue.
_ -> error "Couldn't find unique ghc-internal library when building ghc"

-- Write GHC.Settings.Config
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