+#undef ctf_enum
+#define ctf_enum(_name, _type, _item, _src)
+
+#undef ctf_custom_field
+#define ctf_custom_field(_type, _item, _code)
+
+#undef ctf_custom_type
+#define ctf_custom_type(...)
+
+#undef ctf_custom_code
+#define ctf_custom_code(...)
+
+#undef ctf_align
+#define ctf_align(_type)
+