Add Outputable GhcMode instance

diff --git a/compiler/main/DynFlags.hs b/compiler/main/DynFlags.hs
index 9e2d24b..dba0012 100644 (file)
--- a/compiler/main/DynFlags.hs
+++ b/compiler/main/DynFlags.hs
@@ -450,6 +450,11 @@ data GhcMode
   | MkDepend            -- ^ @ghc -M@, see "Finder" for why we need this
   deriving Eq
 
   | MkDepend            -- ^ @ghc -M@, see "Finder" for why we need this
   deriving Eq
 

+instance Outputable GhcMode where
+  ppr CompManager = ptext (sLit "CompManager")
+  ppr OneShot     = ptext (sLit "OneShot")
+  ppr MkDepend    = ptext (sLit "MkDepend")
+

 isOneShot :: GhcMode -> Bool
 isOneShot OneShot = True
 isOneShot _other  = False
 isOneShot :: GhcMode -> Bool
 isOneShot OneShot = True
 isOneShot _other  = False