X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c079af66c8fb4a2f68f33c6d3940b8ad8ec98f27..fe8b03618ae0a511bf76e85565b3d43b68e99cd5:/include/wx/dlimpexp.h

diff --git a/include/wx/dlimpexp.h b/include/wx/dlimpexp.h
index b3e4258db8..b429d2d938 100644
--- a/include/wx/dlimpexp.h
+++ b/include/wx/dlimpexp.h
@@ -16,7 +16,10 @@
 #ifndef _WX_DLIMPEXP_H_
 #define _WX_DLIMPEXP_H_
 
-#if defined(__WXMSW__)
+#if defined(HAVE_VISIBILITY)
+#    define WXEXPORT __attribute__ ((visibility("default")))
+#    define WXIMPORT __attribute__ ((visibility("default")))
+#elif defined(__WINDOWS__)
     /*
        __declspec works in BC++ 5 and later, Watcom C++ 11.0 and later as well
        as VC++ and gcc
@@ -238,9 +241,78 @@
     #define WXDLLIMPEXP_STC
 #endif
 
+/*
+   GCC warns about using __attribute__ (and also __declspec in mingw32 case) on
+   forward declarations while MSVC complains about forward declarations without
+   __declspec for the classes later declared with it, so we need a separate set
+   of macros for forward declarations to hide this difference:
+ */
+#if defined(HAVE_VISIBILITY) || (defined(__WINDOWS__) && defined(__GNUC__))
+    #define WXDLLIMPEXP_FWD_BASE
+    #define WXDLLIMPEXP_FWD_NET
+    #define WXDLLIMPEXP_FWD_CORE
+    #define WXDLLIMPEXP_FWD_ADV
+    #define WXDLLIMPEXP_FWD_QA
+    #define WXDLLIMPEXP_FWD_ODBC
+    #define WXDLLIMPEXP_FWD_DBGRID
+    #define WXDLLIMPEXP_FWD_HTML
+    #define WXDLLIMPEXP_FWD_GL
+    #define WXDLLIMPEXP_FWD_XML
+    #define WXDLLIMPEXP_FWD_XRC
+    #define WXDLLIMPEXP_FWD_AUI
+    #define WXDLLIMPEXP_FWD_RICHTEXT
+    #define WXDLLIMPEXP_FWD_MEDIA
+    #define WXDLLIMPEXP_FWD_STC
+#else
+    #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_ODBC      WXDLLIMPEXP_ODBC
+    #define WXDLLIMPEXP_FWD_DBGRID    WXDLLIMPEXP_DBGRID
+    #define WXDLLIMPEXP_FWD_HTML      WXDLLIMPEXP_HTML
+    #define WXDLLIMPEXP_FWD_GL        WXDLLIMPEXP_GL
+    #define WXDLLIMPEXP_FWD_XML       WXDLLIMPEXP_XML
+    #define WXDLLIMPEXP_FWD_XRC       WXDLLIMPEXP_XRC
+    #define WXDLLIMPEXP_FWD_AUI       WXDLLIMPEXP_AUI
+    #define WXDLLIMPEXP_FWD_RICHTEXT  WXDLLIMPEXP_RICHTEXT
+    #define WXDLLIMPEXP_FWD_MEDIA     WXDLLIMPEXP_MEDIA
+    #define WXDLLIMPEXP_FWD_STC       WXDLLIMPEXP_STC
+#endif
+
 /* for backwards compatibility, define suffix-less versions too */
 #define WXDLLEXPORT WXDLLIMPEXP_CORE
 #define WXDLLEXPORT_DATA WXDLLIMPEXP_DATA_CORE
 
+/*
+   MSVC up to 6.0 needs to be explicitly told to export template instantiations
+   used by the DLL clients, use this macro to do it like this:
+
+       template <typename T> class Foo { ... };
+       WXDLLIMPEXP_TEMPLATE_INSTANCE_BASE( Foo<int> )
+
+   (notice that currently we only need this for the wxBase library)
+ */
+#if defined(__VISUALC__) && (__VISUALC__ <= 1200)
+    #ifdef WXMAKINGDLL_BASE
+        #define WXDLLIMPEXP_TEMPLATE_INSTANCE_BASE(decl) \
+            template class WXDLLIMPEXP_BASE decl;
+    #else
+        /*
+           We need to disable this warning when using this macro, as
+           recommended by Microsoft itself: 
+
+           http://support.microsoft.com/default.aspx?scid=kb%3ben-us%3b168958
+         */
+        #pragma warning(disable:4231)
+
+        #define WXDLLIMPEXP_TEMPLATE_INSTANCE_BASE(decl) \
+            extern template class WXDLLIMPEXP_BASE decl;
+    #endif
+#else /* not VC <= 6 */
+    #define WXDLLIMPEXP_TEMPLATE_INSTANCE_BASE(decl)
+#endif /* VC6/others */
+
 #endif /* _WX_DLIMPEXP_H_ */