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diff --git a/Source/cmOutputRequiredFilesCommand.h b/Source/cmOutputRequiredFilesCommand.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 cmOutputRequiredFilesCommand_h
+#define cmOutputRequiredFilesCommand_h
+
+#include "cmCommand.h"
+#include "cmMakeDepend.h"
+
+/** \class cmOutputRequiredFilesCommand
+ * \brief Output a list of required files for a source file
+ *
+ */
+class cmOutputRequiredFilesCommand : public cmCommand
+{
+public:
+  /**
+   * This is a virtual constructor for the command.
+   */
+  virtual cmCommand* Clone() 
+    {
+    return new cmOutputRequiredFilesCommand;
+    }
+
+  /**
+   * 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 "output_required_files";}
+
+  /**
+   * Succinct documentation.
+   */
+  virtual const char* GetTerseDocumentation() const
+    {
+    return "Deprecated.  Approximate C preprocessor dependency scanning.";
+    }
+  
+  /**
+   * More documentation.
+   */
+  virtual const char* GetFullDocumentation() const
+    {
+    return
+      "This command exists only because ancient CMake versions provided it.  "
+      "CMake handles preprocessor dependency scanning automatically using a "
+      "more advanced scanner.\n"
+      "  output_required_files(srcfile outputfile)\n"
+      "Outputs a list of all the source files that are required by the "
+      "specified srcfile. This list is written into outputfile. This is "
+      "similar to writing out the dependencies for srcfile except that it "
+      "jumps from .h files into .cxx, .c and .cpp files if possible.";
+    }
+
+  /** This command is kept for compatibility with older CMake versions. */
+  virtual bool IsDiscouraged() const
+    {
+    return true;
+    }
+
+  
+  cmTypeMacro(cmOutputRequiredFilesCommand, cmCommand);
+  void ListDependencies(cmDependInformation const *info,
+                        FILE *fout,
+                        std::set<cmDependInformation const*> *visited);
+
+private:
+  std::string File;
+  std::string OutputFile;
+};
+
+
+
+#endif