Index: opc89.h
===================================================================
--- opc89.h	(nonexistent)
+++ opc89.h	(revision 528)
@@ -0,0 +1,16 @@
+#ifdef __OPC89__
+
+/* Being compiled with opc89: use attributes to mark types and functions */
+#	define funcops __attribute__((opc89_ops))
+#	define opfunc __attribute__((opc89_opfunc))
+
+/* make sure asserts are kept as is */
+#define assert(a)
+
+#else
+
+/* Being compiled with a c compiler: make opc marks invisible */
+#	define funcops
+#	define opfunc
+
+#endif