cpukit: Add libdl with the Runtime Loader (RTL) code.

This is a merge of the RTL project.

cpukit/libdl/rtl-string.h

@@ -0,0 +1,37 @@
+/*
+ *  COPYRIGHT (c) 2012 Chris Johns <chrisj@rtems.org>
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+/**
+ * @file
+ *
+ * @ingroup rtems_rtl
+ *
+ * @brief RTEMS Run-Time Linker String managment.
+ */
+
+#if !defined (_RTEMS_RTL_STRING_H_)
+#define _RTEMS_RTL_STRING_H_
+
+#include "rtl-indirect-ptr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * A string duplicate that uses the RTL allocator.
+ *
+ * @param s1 The string to duplicate.
+ * @return char* The copy of the string. NULL if there is no memory.
+ */
+char* rtems_rtl_strdup (const char *s1);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif