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diff --git a/Source/cmEnableLanguageCommand.h b/Source/cmEnableLanguageCommand.h
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+++ b/Source/cmEnableLanguageCommand.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 cmEnableLanguageCommand_h
+#define cmEnableLanguageCommand_h
+
+#include "cmCommand.h"
+
+/** \class cmEnableLanguageCommand
+ * \brief Specify the name for this build project.
+ *
+ * cmEnableLanguageCommand is used to specify a name for this build project.
+ * It is defined once per set of CMakeList.txt files (including
+ * all subdirectories). Currently it just sets the name of the workspace
+ * file for Microsoft Visual C++
+ */
+class cmEnableLanguageCommand : public cmCommand
+{
+public:
+  /**
+   * This is a virtual constructor for the command.
+   */
+  virtual cmCommand* Clone()
+    {
+    return new cmEnableLanguageCommand;
+    }
+
+  /**
+   * 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 "enable_language";}
+
+  /**
+   * Succinct documentation.
+   */
+  virtual const char* GetTerseDocumentation() const
+    {
+    return "Enable a language (CXX/C/Fortran/etc)";
+    }
+
+  /**
+   * More documentation.
+   */
+  virtual const char* GetFullDocumentation() const
+    {
+    return
+      "  enable_language(languageName [OPTIONAL] )\n"
+      "This command enables support for the named language in CMake. "
+      "This is the same as the project command but does not create "
+      "any of the extra variables that are created by the project command. "
+      "Example languages are CXX, C, Fortran. "
+      "If OPTIONAL is used, use the CMAKE_<languageName>_COMPILER_WORKS "
+      "variable to check whether the language has been enabled successfully."
+      "\n"
+      "This command must be called on file scope (not inside a function) and "
+      "the language enabled can only be used in the calling project or its "
+      "subdirectories added by add_subdirectory(). Also note that at present, "
+      "the OPTIONAL argument does not work.";
+    }
+
+  cmTypeMacro(cmEnableLanguageCommand, cmCommand);
+};
+
+
+
+#endif