--- file_not_specified_in_diff	
+++ file_not_specified_in_diff	
@@ -, +, @@ 
--- src/filelist-order.cxx
+++ src/filelist-order.cxx
@@ -19,6 +19,7 @@ 
 #include <iostream>
 #include <fstream>
 #include <vector>
+#include <cstdlib>
 
 #include <assert.h>
 #include <string.h>