Use auto-generated dependency files and clean them

diff --git a/tests/Makefile b/tests/Makefile
index 9c4a428..5422f0d 100644 (file)
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -24,4 +24,6 @@ test-base64: $(BASE64_OBJS)
 
 clean:
        $(MAKE) -C ../src clean
-       rm -f $(TESTS) *~ *.o
+       rm -f $(TESTS) *~ *.o *.d
+
+-include $(OBJS:%.o=%.d)