diff -Naur dar-2.4.0.orig/src/check/all_features.cpp dar-2.4.0/src/check/all_features.cpp
--- dar-2.4.0.orig/src/check/all_features.cpp	2011-04-01 04:21:02.000000000 +0900
+++ dar-2.4.0/src/check/all_features.cpp	2011-06-07 09:03:47.772855768 +0900
@@ -25,6 +25,13 @@
 
 #include "../my_config.h"
 
+extern "C"
+{
+#if HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+}
+
 #include "libdar.hpp"
 
 using namespace libdar;