$OpenBSD: patch-Makefile,v 1.2 2009/01/07 09:18:39 jasper Exp $
--- Makefile.orig	Thu Mar 15 03:49:11 2001
+++ Makefile	Tue Jan  6 23:23:06 2009
@@ -20,22 +20,45 @@ VERSION = "1.40"
 # built in MD5 message digest routines) uncomment the following
 # line (try this if you're having trouble with built in code).
 #
-#EXTERNAL_MD5 = -DEXTERNAL_MD5=\"md5sum\"
+#EXTERNAL_MD5 = 1
 
 #
+# Uncomment to enable system built-in MD5 functions
+SYSTEM_MD5 = 1
+
+#
 # This version of fdupes can use a red-black tree structure to
 # store file information. This is disabled by default, as it
 # hasn't been optimized or verified correct. If you wish to
 # enable this untested option, uncomment the following line.
 #
-#EXPERIMENTAL_RBTREE = -DEXPERIMENTAL_RBTREE
+#EXPERIMENTAL_RBTREE = 1
 
 #####################################################################
 # no need to modify anything beyond this point                      #
 #####################################################################
 
-fdupes: fdupes.c md5/md5.c	
-	gcc fdupes.c md5/md5.c -Wall -o fdupes -DVERSION=\"$(VERSION)\" $(EXTERNAL_MD5) $(EXPERIMENTAL_RBTREE)
+CFLAGS += -Wall -DVERSION=\"$(VERSION)\"
+LDFLAGS =
+SRC_FILES = fdupes.c
+
+.ifdef SYSTEM_MD5
+CFLAGS += -DHAVE_MD5
+#LDFLAGS += -lssl -lcrypto
+.else
+SRC_FILES += md5/md5.c
+.endif
+
+.ifdef EXTERNAL_MD5
+CFLAGS += -DEXTERNAL_MD5=\"md5sum\"
+.endif
+
+.ifdef EXPERIMENTAL_RBTREE
+CFLAGS += -DEXPERIMENTAL_RBTREE
+.endif
+
+fdupes: $(SRC_FILES)
+	$(CC) $(CFLAGS) $(SRC_FILES) $(LDFLAGS) -o fdupes
 
 install: fdupes
 	cp fdupes $(INSTALLDIR)