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diff --git a/Source/cmAuxSourceDirectoryCommand.h b/Source/cmAuxSourceDirectoryCommand.h
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+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#ifndef cmAuxSourceDirectoryCommand_h
+#define cmAuxSourceDirectoryCommand_h
+
+#include "cmCommand.h"
+
+/** \class cmAuxSourceDirectoryCommand
+ * \brief Specify auxiliary source code directories.
+ *
+ * cmAuxSourceDirectoryCommand specifies source code directories
+ * that must be built as part of this build process. This directories
+ * are not recursively processed like the SUBDIR command (cmSubdirCommand).
+ * A side effect of this command is to create a subdirectory in the build
+ * directory structure.
+ */
+class cmAuxSourceDirectoryCommand : public cmCommand
+{
+public:
+  /**
+   * This is a virtual constructor for the command.
+   */
+  virtual cmCommand* Clone()
+    {
+    return new cmAuxSourceDirectoryCommand;
+    }
+
+  /**
+   * This is called when the command is first encountered in
+   * the CMakeLists.txt file.
+   */
+  virtual bool InitialPass(std::vector<std::string> const& args,
+                           cmExecutionStatus &status);
+
+  /**
+   * The name of the command as specified in CMakeList.txt.
+   */
+  virtual const char* GetName() const { return "aux_source_directory";}
+
+  /**
+   * Succinct documentation.
+   */
+  virtual const char* GetTerseDocumentation() const
+    {
+    return "Find all source files in a directory.";
+    }
+
+  /**
+   * More documentation.
+   */
+  virtual const char* GetFullDocumentation() const
+    {
+    return
+      "  aux_source_directory(<dir> <variable>)\n"
+      "Collects the names of all the source files in the specified "
+      "directory and stores the list in the <variable> provided.  This "
+      "command is intended to be used by projects that use explicit "
+      "template instantiation.  Template instantiation files can be "
+      "stored in a \"Templates\" subdirectory and collected automatically "
+      "using this command to avoid manually listing all instantiations.\n"
+      "It is tempting to use this command to avoid writing the list of "
+      "source files for a library or executable target.  While this seems "
+      "to work, there is no way for CMake to generate a build system that "
+      "knows when a new source file has been added.  Normally the "
+      "generated build system knows when it needs to rerun CMake because "
+      "the CMakeLists.txt file is modified to add a new source.  When the "
+      "source is just added to the directory without modifying this file, "
+      "one would have to manually rerun CMake to generate a build system "
+      "incorporating the new file.";
+    }
+
+  cmTypeMacro(cmAuxSourceDirectoryCommand, cmCommand);
+};
+
+
+
+#endif