[glib] gversionmacros: Add version macros for GLib 2.58

[Philip Withnall <pwithnall src gnome org>]

commit affe33b7e7b4eb5550488866cbd1a63d942b51d2
Author: Philip Withnall <withnall endlessm com>
Date:   Tue Mar 13 12:16:14 2018 +0000

    gversionmacros: Add version macros for GLib 2.58
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    Reviewed-by: nobody

 glib/gversionmacros.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
---
diff --git a/glib/gversionmacros.h b/glib/gversionmacros.h
index df6585c2f..9d2995828 100644
--- a/glib/gversionmacros.h
+++ b/glib/gversionmacros.h
@@ -195,6 +195,16 @@
  */
 #define GLIB_VERSION_2_56       (G_ENCODE_VERSION (2, 56))
 
+/**
+ * GLIB_VERSION_2_58:
+ *
+ * A macro that evaluates to the 2.58 version of GLib, in a format
+ * that can be used by the C pre-processor.
+ *
+ * Since: 2.58
+ */
+#define GLIB_VERSION_2_58       (G_ENCODE_VERSION (2, 58))
+
 /* evaluates to the current stable version; for development cycles,
  * this means the next stable target
  */
@@ -510,4 +520,18 @@
 # define GLIB_AVAILABLE_IN_2_56                 _GLIB_EXTERN
 #endif
 
+#if GLIB_VERSION_MIN_REQUIRED >= GLIB_VERSION_2_58
+# define GLIB_DEPRECATED_IN_2_58                GLIB_DEPRECATED
+# define GLIB_DEPRECATED_IN_2_58_FOR(f)         GLIB_DEPRECATED_FOR(f)
+#else
+# define GLIB_DEPRECATED_IN_2_58                _GLIB_EXTERN
+# define GLIB_DEPRECATED_IN_2_58_FOR(f)         _GLIB_EXTERN
+#endif
+
+#if GLIB_VERSION_MAX_ALLOWED < GLIB_VERSION_2_58
+# define GLIB_AVAILABLE_IN_2_58                 GLIB_UNAVAILABLE(2, 58)
+#else
+# define GLIB_AVAILABLE_IN_2_58                 _GLIB_EXTERN
+#endif
+
 #endif /*  __G_VERSION_MACROS_H__ */