Add a macro to declare that a particular symbol is available in all
versions of GLib.
All newly-added symbols should have proper version macros (like
GLIB_AVAILABLE_IN_2_36) and this macro is less likely to get used 'by
accident' for those than one with a name like GLIB_EXTERN or
GLIB_PUBLIC.
https://bugzilla.gnome.org/show_bug.cgi?id=688681
* do *not* use them in other projects. Instead, use G_DEPRECATED
* or define your own wrappers around it.
*/
+#define GLIB_AVAILABLE_IN_ALL
/* XXX: Every new stable minor release should add a set of macros here */