$NetBSD: patch-Makefile.am,v 1.1 2015/09/12 22:54:01 joerg Exp $

--- Makefile.am.orig	2015-09-12 21:32:07.226531526 +0000
+++ Makefile.am
@@ -66,6 +66,7 @@ rdiff_DEPENDENCIES = librsync.la
 # this script is used to build prototab.[ch]
 noinst_SCRIPTS = mkprototab.pl
 
+prototab.c emit.c patch.c: prototab.h
 # Autogenerated by a script.
-prototab.c prototab.h: $(srcdir)/mkprototab.pl
+prototab.h: $(srcdir)/mkprototab.pl
 	perl $(srcdir)/mkprototab.pl prototab.c prototab.h