Addings to stdlib.h must be added to cstdlib too

include/cxx/cstdlib

@@ -1,7 +1,7 @@
 //***************************************************************************
 // include/cxx/cstdlib
 //
-//   Copyright (C) 2009, 2012 Gregory Nutt. All rights reserved.
+//   Copyright (C) 2009, 2012, 2015 Gregory Nutt. All rights reserved.
 //   Author: Gregory Nutt <gnutt@nuttx.org>
 //
 // Redistribution and use in source and binary forms, with or without
@@ -100,15 +100,29 @@ namespace std
   using ::calloc;
   using ::mallinfo;
 
-  // Misc.
+  // Arithmetic
 
   using ::abs;
   using ::labs;
 #ifdef CONFIG_HAVE_LONG_LONG
   using ::llabs;
 #endif
+
+#ifdef CONFIG_CAN_PASS_STRUCTS
+  using ::div;
+  using ::ldiv;
+#ifdef CONFIG_HAVE_LONG_LONG
+  using ::lldiv;
+#endif
+#endif
+
+  // Temporary files
+
   using ::mktemp;
   using ::mkstemp;
+
+  // Sorting
+
   using ::qsort;
 }