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diff --git a/Source/cmIncludeDirectoryCommand.h b/Source/cmIncludeDirectoryCommand.h
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+++ b/Source/cmIncludeDirectoryCommand.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 cmIncludeDirectoryCommand_h
+#define cmIncludeDirectoryCommand_h
+
+#include "cmCommand.h"
+
+/** \class cmIncludeDirectoryCommand
+ * \brief Add include directories to the build.
+ *
+ * cmIncludeDirectoryCommand is used to specify directory locations
+ * to search for included files.
+ */
+class cmIncludeDirectoryCommand : public cmCommand
+{
+public:
+  /**
+   * This is a virtual constructor for the command.
+   */
+  virtual cmCommand* Clone()
+    {
+    return new cmIncludeDirectoryCommand;
+    }
+
+  /**
+   * 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 "include_directories";}
+
+  /**
+   * Succinct documentation.
+   */
+  virtual const char* GetTerseDocumentation() const
+    {
+    return "Add include directories to the build.";
+    }
+
+  /**
+   * More documentation.
+   */
+  virtual const char* GetFullDocumentation() const
+    {
+    return
+      "  include_directories([AFTER|BEFORE] [SYSTEM] dir1 dir2 ...)\n"
+      "Add the given directories to those the compiler uses to search "
+      "for include files.  Relative paths are interpreted as relative to "
+      "the current source directory. \n"
+      "The include directories are added to the directory property "
+      "INCLUDE_DIRECTORIES for the current CMakeLists file. "
+      "They are also added to the target property INCLUDE_DIRECTORIES "
+      "for each target in the current CMakeLists file. "
+      "The target property values are the ones used by the generators."
+      "\n"
+      "By default the directories are appended onto the current list of "
+      "directories. "
+      "This default behavior can be changed by setting "
+      "CMAKE_INCLUDE_DIRECTORIES_BEFORE to ON. "
+      "By using AFTER or BEFORE explicitly, you can select between "
+      "appending and prepending, independent of the default. "
+      "\n"
+      "If the SYSTEM option is given, the compiler will be told the "
+      "directories are meant as system include directories on some "
+      "platforms (signalling this setting might achieve effects such as "
+      "the compiler skipping warnings, or these fixed-install system files "
+      "not being considered in dependency calculations - see compiler docs).";
+    }
+
+  cmTypeMacro(cmIncludeDirectoryCommand, cmCommand);
+
+protected:
+  // used internally
+  void GetIncludes(const std::string &arg, std::vector<std::string> &incs);
+  void NormalizeInclude(std::string &inc);
+};
+
+
+
+#endif