Undef __P first.

diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index 1941851c490c424405c7b8420b6987a9edaee509..533882eb0e8ff9dc997ed1a5f1787f4d89781548 100644 (file)
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -21,6 +21,9 @@ Cambridge, MA 02139, USA.  */
 #define        _SYS_CDEFS_H    1
 #include <features.h>
 
+/* Some user header file might have defined this before.  */
+#undef __P
+
 #ifdef __GNUC__
 
 #define        __P(args)       args    /* GCC can always grok prototypes.  */