doxygen comment for acyclic.c

diff --git a/cmd/tools/acyclic.c b/cmd/tools/acyclic.c
index 14a4a75152da60fe8078d36880455ca14755f83c..9cedc411b6cef59956c288e9bbeb4c14a860d2d1 100644 (file)
--- a/cmd/tools/acyclic.c
+++ b/cmd/tools/acyclic.c
@@ -1,3 +1,8 @@
+/**
+ * @file
+ * @brief make directed graph acyclic
+ */
+
 /*************************************************************************
  * Copyright (c) 2011 AT&T Intellectual Property 
  * All rights reserved. This program and the accompanying materials