Fixes for GHC 8.x, archive loading, -dynamic, and file generation

testsuite/dynload/io/api/API.hs

@@ -1,19 +1,20 @@
-{-# OPTIONS -fglasgow-exts #-}
-
 module API where
 
 import Data.Typeable
 
 data TestIO = TestIO { 
                 field :: IO String 
+#if __GLASGOW_HASKELL__ >= 800
+        } deriving Typeable
+#else
         }
-
 instance Typeable TestIO where
 #if __GLASGOW_HASKELL__ >= 603
     typeOf i = mkTyConApp (mkTyCon "API.TestIO") []
 #else
     typeOf i = mkAppTy (mkTyCon "API.TestIO") []
 #endif
+#endif
 
 testio :: TestIO
 testio = TestIO { field = return "default value" }