Move wxAdv library contents into wxCore

This basically removes the "adv" library, even though it's still
preserved for compatibility with user make/project files referring to
it.

It is done because the distinction between "adv" and "core" was never
really clear (e.g. why wxTreeCtrl was in core but wxTreeListCtrl in
adv?) and it prevented some core classes from using adv ones.

include/wx/dlimpexp.h

@@ -145,16 +145,10 @@
 #    define WXDLLIMPEXP_INLINE_CORE
 #endif
 
-#ifdef WXMAKINGDLL_ADV
-#    define WXDLLIMPEXP_ADV WXEXPORT
-#    define WXDLLIMPEXP_DATA_ADV(type) WXEXPORT type
-#elif defined(WXUSINGDLL)
-#    define WXDLLIMPEXP_ADV WXIMPORT
-#    define WXDLLIMPEXP_DATA_ADV(type) WXIMPORT type
-#else /* not making nor using DLL */
-#    define WXDLLIMPEXP_ADV
-#    define WXDLLIMPEXP_DATA_ADV(type) type
-#endif
+/* Advanced library doesn't exist any longer, but its macros are preserved for
+   compatibility. Do not use them in the new code. */
+#define WXDLLIMPEXP_ADV WXDLLIMPEXP_CORE
+#define WXDLLIMPEXP_DATA_ADV(type) WXDLLIMPEXP_DATA_CORE(type)
 
 #ifdef WXMAKINGDLL_QA
 #    define WXDLLIMPEXP_QA WXEXPORT
@@ -277,7 +271,6 @@
     #define WXDLLIMPEXP_FWD_BASE
     #define WXDLLIMPEXP_FWD_NET
     #define WXDLLIMPEXP_FWD_CORE
-    #define WXDLLIMPEXP_FWD_ADV
     #define WXDLLIMPEXP_FWD_QA
     #define WXDLLIMPEXP_FWD_HTML
     #define WXDLLIMPEXP_FWD_GL
@@ -294,7 +287,6 @@
     #define WXDLLIMPEXP_FWD_BASE      WXDLLIMPEXP_BASE
     #define WXDLLIMPEXP_FWD_NET       WXDLLIMPEXP_NET
     #define WXDLLIMPEXP_FWD_CORE      WXDLLIMPEXP_CORE
-    #define WXDLLIMPEXP_FWD_ADV       WXDLLIMPEXP_ADV
     #define WXDLLIMPEXP_FWD_QA        WXDLLIMPEXP_QA
     #define WXDLLIMPEXP_FWD_HTML      WXDLLIMPEXP_HTML
     #define WXDLLIMPEXP_FWD_GL        WXDLLIMPEXP_GL
@@ -309,6 +301,9 @@
     #define WXDLLIMPEXP_FWD_WEBVIEW   WXDLLIMPEXP_WEBVIEW
 #endif
 
+/* This macro continues to exist for backwards compatibility only. */
+#define WXDLLIMPEXP_FWD_ADV       WXDLLIMPEXP_FWD_CORE
+
 /* for backwards compatibility, define suffix-less versions too */
 #define WXDLLEXPORT WXDLLIMPEXP_CORE
 #define WXDLLEXPORT_DATA WXDLLIMPEXP_DATA_CORE