Signed-off-by: Alan Coopersmith <[email protected]>
---
 Xfuncproto.h.in |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/Xfuncproto.h.in b/Xfuncproto.h.in
index b624956..fd9f29b 100644
--- a/Xfuncproto.h.in
+++ b/Xfuncproto.h.in
@@ -128,4 +128,16 @@ in this Software without prior written authorization from 
The Open Group.
 # define _X_ATTRIBUTE_PRINTF(x,y)
 #endif
 
+/* C99 keyword "restrict" or equivalent extensions in pre-C99 compilers */
+#ifndef _X_RESTRICT_KYWD
+# if defined(restrict) /* assume autoconf set it correctly */ || \
+   (defined(__STDC__) && (__STDC_VERSION__ - 0 >= 199901L)) /* C99 */
+#  define _X_RESTRICT_KYWD  restrict
+# elif defined(__GNUC__) && !defined(__STRICT_ANSI__) /* gcc w/C89+extensions 
*/
+#  define _X_RESTRICT_KYWD __restrict__
+# else
+#  define _X_RESTRICT_KYWD
+# endif
+#endif
+
 #endif /* _XFUNCPROTO_H_ */
-- 
1.7.3.2

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