+/*
+ 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 */
+