17 #if defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__) || \ 18 defined( __BCPLUSPLUS__) || defined( __MWERKS__) 20 # if defined(GEOS_DLL_EXPORT) 21 # define GEOS_DLL __declspec(dllexport) 22 # elif defined(GEOS_DLL_IMPORT) 23 # define GEOS_DLL __declspec(dllimport) 34 # pragma warning(disable: 4251) // identifier : class type needs to have dll-interface to be used by clients of class type2