value .depend, so that the conditional is really used.
okay guenther@
# $FreeBSD: src/gnu/usr.bin/cc/cc_tools/Makefile,v 1.88.8.1 2009/04/15 03:14:26 kensmith Exp $
-# $OpenBSD: Makefile,v 1.14 2016/09/01 11:03:09 patrick Exp $
+# $OpenBSD: Makefile,v 1.15 2017/06/21 00:10:23 espie Exp $
.include <bsd.own.mk>
#-----------------------------------------------------------------------
# Manual dependencies.
-.if !exists(${DEPENDFILE})
+.if !exists(.depend)
.include "Makefile.dep"
.endif