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Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC

Commits:

759fd15a

by Andreas Klebinger at 2026-01-21T16:05:28-05:00

Don't build GHC with -Wcompat

Without bumping the boot compiler the warnings it produces are often not
actionable leading to pointless noise.

Fixes #26800

2 changed files:

compiler/ghc.cabal.in
hadrian/src/Settings/Builders/Ghc.hs

Changes:

compiler/ghc.cabal.in

@@ -149,6 +149,7 @@ Library
      else
          Build-Depends: unix   >= 2.7 && < 2.9
 +    -- Hadrian further set some warnings in its Settings.Warnings module.
      GHC-Options: -Wall
                   -Wno-name-shadowing
                   -Wnoncanonical-monad-instances

hadrian/src/Settings/Builders/Ghc.hs

@@ -38,7 +38,6 @@ compileAndLinkHs = (builder (Ghc CompileHs) ||^ builder (Ghc LinkHs)) ? do
      stage <- getStage
      hie_path <- getHieBuildPath
      mconcat [ arg "-Wall"
 -            , arg "-Wcompat"
              , not useColor ? builder (Ghc CompileHs) ?
                -- N.B. Target.trackArgument ignores this argument from the
                -- input hash to avoid superfluous recompilation, avoiding