-#define FD_IMPLICIT 0x0001U /* Implicitly declared function */
-#define FD_EMPTY 0x0002U /* Function with empty param list */
-#define FD_VOID_PARAM 0x0004U /* Function with a void param list */
-#define FD_VARIADIC 0x0008U /* Function with variable param list */
-#define FD_FASTCALL 0x0010U /* __fastcall__ function */
-#define FD_OLDSTYLE 0x0020U /* Old style (K&R) function */
-#define FD_UNNAMED_PARAMS 0x0040U /* Function has unnamed params */
+#define FD_NONE 0x0000U /* No flags */
+#define FD_EMPTY 0x0001U /* Function with empty param list */
+#define FD_VOID_PARAM 0x0002U /* Function with a void param list */
+#define FD_VARIADIC 0x0004U /* Function with variable param list */
+#define FD_OLDSTYLE 0x0010U /* Old style (K&R) function */
+#define FD_OLDSTYLE_INTRET 0x0020U /* K&R func has implicit int return */
+#define FD_UNNAMED_PARAMS 0x0040U /* Function has unnamed params */