copying branch over from other 2013 repo
diff --git a/aos/atom_code/ipc_lib/mutex.cpp b/aos/atom_code/ipc_lib/mutex.cpp
index d1f0ef2..4753e78 100644
--- a/aos/atom_code/ipc_lib/mutex.cpp
+++ b/aos/atom_code/ipc_lib/mutex.cpp
@@ -2,6 +2,8 @@
 
 #include <inttypes.h>
 #include <errno.h>
+#include <stdio.h>
+#include <string.h>
 
 #include "aos/aos_core.h"
 #include "aos/common/type_traits.h"