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

[ghc-base.git] / GHC / MVar.hs

diff --git a/GHC/MVar.hs b/GHC/MVar.hs
index 98ecd45..8c653dc 100644 (file)
--- a/GHC/MVar.hs
+++ b/GHC/MVar.hs
@@ -1,5 +1,7 @@
-{-# OPTIONS_GHC -fno-implicit-prelude -funbox-strict-fields #-}
+{-# LANGUAGE NoImplicitPrelude, MagicHash, UnboxedTuples #-}
+{-# OPTIONS_GHC -funbox-strict-fields #-}
 {-# OPTIONS_HADDOCK hide #-}
+
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  GHC.MVar
@@ -29,7 +31,7 @@ module GHC.MVar (
   ) where
 
 import GHC.Base
-import GHC.IO
+import GHC.IO()   -- instance Monad IO
 import Data.Maybe
 
 data MVar a = MVar (MVar# RealWorld a)