moved XML classes to the core

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@22172 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/defs.h

@@ -376,6 +376,7 @@ typedef int wxWindowID;
 
     #define WXMAKINGDLL_CORE
     #define WXMAKINGDLL_HTML
+    #define WXMAKINGDLL_XML
 #endif // WXMAKINGDLL
 
 // WXDLLEXPORT maps to export declaration when building the DLL, to import
@@ -421,6 +422,14 @@ typedef int wxWindowID;
     #define WXDLLIMPEXP_GL
 #endif
 
+#ifdef WXMAKINGDLL_XML
+    #define WXDLLIMPEXP_XML WXEXPORT
+#elif defined(WXUSINGDLL)
+    #define WXDLLIMPEXP_XML WXIMPORT
+#else // not making nor using DLL
+    #define WXDLLIMPEXP_XML
+#endif
+
 // for backwards compatibility, define suffix-less versions too
 #define WXDLLEXPORT WXDLLIMPEXP_CORE
 #define WXDLLEXPORT_DATA WXDLLIMPEXP_DATA_CORE