half: implement dummy half support to get cts to build.

This gets past the CTS common code requiring half classes.

include/CL/sycl.hpp

@@ -46,6 +46,7 @@
 #include "CL/sycl/event.hpp"
 #include "CL/sycl/exception.hpp"
 #include "CL/sycl/group.hpp"
+#include "CL/sycl/half.hpp"
 #include "CL/sycl/handler.hpp"
 #include "CL/sycl/h_item.hpp"
 #include "CL/sycl/id.hpp"

include/CL/sycl/half.hpp

@@ -0,0 +1,24 @@
+#ifndef TRISYCL_SYCL_HALF_HPP
+#define TRISYCL_SYCL_HALF_HPP
+
+/** \file SYCL Half support - dummy
+    This file is distributed under the University of Illinois Open Source
+    License. See LICENSE.TXT for details.
+ */
+
+/* Dummy half implementation - this is enough to get the CTS to build. */
+namespace cl {
+namespace sycl {
+
+class half {
+public:
+  half(int) {};
+
+  bool operator>(const half &h1) { return false; };
+};
+
+}
+
+}
+
+#endif