$NetBSD: patch-configure,v 1.1 2015/06/22 21:28:38 markd Exp $

--- configure.orig	2015-03-12 14:42:02.000000000 +0000
+++ configure
@@ -15788,6 +15788,9 @@ LDFLAGS="$X_LIBS $LDFLAGS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <X11/extensions/XInput2.h>
+#ifndef XIScrollClass
+ bollocks
+#endif
 int
 main ()
 {