* include/cygwin/stat.h (S_TYPEISMQ): Define.

(S_TYPEISSEM): Dttio.
	(S_TYPEISSHM): Ditto.

winsup/cygwin/include/cygwin/stat.h

@@ -88,6 +88,13 @@ struct stat
 #define st_birthtime st_birthtim.tv_sec
 #endif
 
+/* POSIX IPC objects are not implemented as distinct file types, so the
+   below macros have to return 0.  The expression is supposed to catch
+   illegal usage with non-stat parameters. */
+#define S_TYPEISMQ(buf)  ((buf)->st_mode,0)
+#define S_TYPEISSEM(buf) ((buf)->st_mode,0)
+#define S_TYPEISSHM(buf) ((buf)->st_mode,0)
+
 #ifdef __cplusplus
 }
 #endif