[gtk/popup-shadow-width: 2/3] Add version macros for 4.2

[Matthias Clasen <matthiasc src gnome org>]

commit 316b414aebc472c86671d371568109ef2db84c59
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jan 11 18:17:59 2021 -0500

    Add version macros for 4.2
    
    These will be needed for adding new API.

 gdk/gdkversionmacros.h.in | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
---
diff --git a/gdk/gdkversionmacros.h.in b/gdk/gdkversionmacros.h.in
index 3c6d6fbf05..b6d0960a7f 100644
--- a/gdk/gdkversionmacros.h.in
+++ b/gdk/gdkversionmacros.h.in
@@ -78,6 +78,14 @@
  */
 #define GDK_VERSION_4_0        (G_ENCODE_VERSION (4, 0))
 
+/**
+ * GDK_VERSION_4_2:
+ *
+ * A macro that evaluates to the 4.2 version of GDK, in a format
+ * that can be used by the C pre-processor.
+ */
+#define GDK_VERSION_4_2        (G_ENCODE_VERSION (4, 2))
+
 
 /* evaluates to the current stable version; for development cycles,
  * this means the next stable target, with a hard backstop to the
@@ -175,4 +183,19 @@
 # define GDK_DEPRECATED_IN_4_0_FOR(f)           _GDK_EXTERN
 #endif
 
+
+#if GDK_VERSION_MAX_ALLOWED < GDK_VERSION_4_2
+# define GDK_AVAILABLE_IN_4_2                   GDK_UNAVAILABLE(4, 2)
+#else
+# define GDK_AVAILABLE_IN_4_2                   _GDK_EXTERN
+#endif
+
+#if GDK_VERSION_MIN_REQUIRED >= GDK_VERSION_4_2
+# define GDK_DEPRECATED_IN_4_2                  GDK_DEPRECATED
+# define GDK_DEPRECATED_IN_4_2_FOR(f)           GDK_DEPRECATED_FOR(f)
+#else
+# define GDK_DEPRECATED_IN_4_2                  _GDK_EXTERN
+# define GDK_DEPRECATED_IN_4_2_FOR(f)           _GDK_EXTERN
+#endif
+
 #endif  /* __GDK_VERSION_MACROS_H__ */