From 6648db8f910fb74c100cf24436bf0df12cba7fd7 Mon Sep 17 00:00:00 2001
From: Jeremy Huddleston <jeremyhu@apple.com>
Date: Wed, 27 Apr 2011 17:25:40 -0700
Subject: Add _X_UNUSED attribute to designate unused variables and silence
 warnings

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
---
 Xfuncproto.h.in | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Xfuncproto.h.in b/Xfuncproto.h.in
index 2b8a226..88d91c0 100644
--- a/Xfuncproto.h.in
+++ b/Xfuncproto.h.in
@@ -122,6 +122,12 @@ in this Software without prior written authorization from The Open Group.
 # define _X_ATTRIBUTE_PRINTF(x,y)
 #endif
 
+#if defined(__GNUC__) &&  ((__GNUC__ * 100 + __GNUC_MINOR__) >= 205)
+#define _X_UNUSED  __attribute__((__unused__))
+#else
+#define _X_UNUSED  /* */
+#endif
+
 /* C99 keyword "inline" or equivalent extensions in pre-C99 compilers */
 #if defined(inline) /* assume autoconf set it correctly */ || \
    (defined(__STDC_VERSION__) && (__STDC_VERSION__ - 0 >= 199901L)) /* C99 */ || \
-- 
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