Use explicit language extensions & remove extension fields from base.cabal

[ghc-base.git] / System / Mem / Weak.hs

diff --git a/System/Mem/Weak.hs b/System/Mem/Weak.hs
index 61dce1d..21411e5 100644 (file)
--- a/System/Mem/Weak.hs
+++ b/System/Mem/Weak.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE CPP #-}
+
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  System.Mem.Weak
@@ -67,16 +69,12 @@ module System.Mem.Weak (
        -- $precise
    ) where
 
-import Data.Maybe (Maybe(..))
-
 #ifdef __HUGS__
 import Hugs.Weak
 import Prelude
 #endif
 
 #ifdef __GLASGOW_HASKELL__
-import GHC.Base (return)
-import GHC.Types (IO)
 import GHC.Weak
 #endif