16 #if defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__) || \ 17 defined( __BCPLUSPLUS__) || defined( __MWERKS__) 19 # if defined(GEOS_DLL_EXPORT) 20 # define GEOS_DLL __declspec(dllexport) 21 # elif defined(GEOS_DLL_IMPORT) 22 # define GEOS_DLL extern __declspec(dllimport) 32 # pragma warning(disable: 4251) // identifier : class type needs to have dll-interface to be used by clients of class type2