-#if defined(VMS) && !defined(__GNUC__)
- /* Suppress portability warnings from DECC for VMS-specific extensions */
-# ifdef __DECC
-# pragma message disable (GLOBALEXT,NOSHAREEXT,READONLYEXT)
+
+# if (defined(WIN32) && defined(__MINGW32__)) || defined(__SYMBIAN32__)
+# ifdef __cplusplus
+# define EXT __declspec(dllexport)
+# define dEXT
+# define EXTCONST __declspec(dllexport) extern const
+# define dEXTCONST const
+# else
+# define EXT __declspec(dllexport)
+# define dEXT
+# define EXTCONST __declspec(dllexport) const
+# define dEXTCONST const
+# endif
+# else
+# ifdef __cplusplus
+# define EXT
+# define dEXT
+# define EXTCONST EXTERN_C const
+# define dEXTCONST const
+# else
+# define EXT
+# define dEXT
+# define EXTCONST const
+# define dEXTCONST const
+# endif