#endif
import Control.Monad ( unless )
-import SYSTEM_IO_ERROR as IO ( catch, isDoesNotExistError )
+import System.IO.Error as IO ( catch, isDoesNotExistError )
import System.Directory ( doesDirectoryExist, createDirectory,
getModificationTime )
import System.FilePath hiding ( searchPathSeparator )
# endif /* DEBUG */
\end{code}
-foldl1' was added in GHC 6.4
-
-\begin{code}
-#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ < 604
-foldl1' :: (a -> a -> a) -> [a] -> a
-foldl1' f (x:xs) = foldl' f x xs
-foldl1' _ [] = panic "foldl1'"
-#endif
-\end{code}
-
%************************************************************************
%* *
\subsubsection[Utils-Carsten-mergesort]{A mergesort from Carsten}