Fix compilation with GHC 6.2.x

[ghc-base.git] / Setup.hs

diff --git a/Setup.hs b/Setup.hs
index 40033bd..e8f73b6 100644 (file)
--- a/Setup.hs
+++ b/Setup.hs
@@ -58,9 +58,9 @@ maybeUpdateFile :: FilePath -> FilePath -> IO ()
 maybeUpdateFile source target = do
   r <- rawSystem "cmp" ["-s" {-quiet-}, source, target]
   case r of 
-    ExitSuccess   -> return ()
-    ExitFailure _ -> copyFile source target
-  removeFile source
+    ExitSuccess   -> removeFile source
+    ExitFailure _ -> do removeFile target; renameFile source target
+  
 
 filter_modules_hook :: Hook a -> Hook a
 filter_modules_hook f pd lbi uhs x