libdl: Add symbol searching and loading from archives.

- Load archive symbol tables to support searching of archives
  for symbols.
- Search archive symbols and load the object file that contains
  the symbol.
- Search the global and archives until all remaining unresolved symbols
  are not found. Group the loaded object files in the pending queue.
- Run the object file and loaded dependents as a group before adding to the
  main object list.
- Remove orphaned object files after references are removed.

Updates #3686

1 files changed, 37 insertions, 0 deletions

diff --git a/cpukit/include/rtems/rtl/rtl-shell.h b/cpukit/include/rtems/rtl/rtl-shell.h
new file mode 100644
index 0000000000..b0a6e8d8d4
--- /dev/null
+++ b/cpukit/include/rtems/rtl/rtl-shell.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 ELF Shell Support.
+ */
+
+#if !defined (_RTEMS_RTL_SHELL_H_)
+#define _RTEMS_RTL_SHELL_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * The RTL single shell command contains sub-commands.
+ *
+ * @param argc The argument count.
+ * @param argv Array of argument strings.
+ * @retval 0 No error.
+ * @return int The exit code.
+ */
+int rtems_rtl_shell_command (int argc, char* argv[]);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif