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diff --git a/Source/cmTryCompileCommand.h b/Source/cmTryCompileCommand.h
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+++ b/Source/cmTryCompileCommand.h
@@ -0,0 +1,119 @@
+/*============================================================================
+  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 cmTryCompileCommand_h
+#define cmTryCompileCommand_h
+
+#include "cmCoreTryCompile.h"
+
+/** \class cmTryCompileCommand
+ * \brief Specifies where to install some files
+ *
+ * cmTryCompileCommand is used to test if soucre code can be compiled
+ */
+class cmTryCompileCommand : public cmCoreTryCompile
+{
+public:
+  /**
+   * This is a virtual constructor for the command.
+   */
+  virtual cmCommand* Clone()
+    {
+    return new cmTryCompileCommand;
+    }
+
+  /**
+   * 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 "try_compile";}
+
+  /**
+   * Succinct documentation.
+   */
+  virtual const char* GetTerseDocumentation() const
+    {
+    return "Try building some code.";
+    }
+
+  /**
+   * More documentation.  */
+  virtual const char* GetFullDocumentation() const
+    {
+    return
+      "  try_compile(RESULT_VAR <bindir> <srcdir>\n"
+      "              <projectName> [targetName] [CMAKE_FLAGS flags...]\n"
+      "              [OUTPUT_VARIABLE <var>])\n"
+      "Try building a project.  In this form, srcdir should contain a "
+      "complete CMake project with a CMakeLists.txt file and all sources. "
+      "The bindir and srcdir will not be deleted after this command is run. "
+      "Specify targetName to build a specific target instead of the 'all' or "
+      "'ALL_BUILD' target."
+      "\n"
+      "  try_compile(RESULT_VAR <bindir> <srcfile>\n"
+      "              [CMAKE_FLAGS flags...]\n"
+      "              [COMPILE_DEFINITIONS flags...]\n"
+      "              [OUTPUT_VARIABLE <var>]\n"
+      "              [COPY_FILE <fileName>])\n"
+      "Try building a source file into an executable.  "
+      "In this form the user need only supply a source file that defines "
+      "a 'main'.  "
+      "CMake will create a CMakeLists.txt file to build the source "
+      "as an executable.  "
+      "Specify COPY_FILE to get a copy of the linked executable at the "
+      "given fileName."
+      "\n"
+      "In this version all files in bindir/CMakeFiles/CMakeTmp "
+      "will be cleaned automatically. For debugging, --debug-trycompile can "
+      "be passed to cmake to avoid this clean. However, multiple sequential "
+      "try_compile operations reuse this single output directory. If you "
+      "use --debug-trycompile, you can only debug one try_compile call at a "
+      "time. The recommended procedure is to configure with cmake all the "
+      "way through once, then delete the cache entry associated with "
+      "the try_compile call of interest, and then re-run cmake again with "
+      "--debug-trycompile."
+      "\n"
+      "Some extra flags that can be included are,  "
+      "INCLUDE_DIRECTORIES, LINK_DIRECTORIES, and LINK_LIBRARIES.  "
+      "COMPILE_DEFINITIONS are -Ddefinition that will be passed to the "
+      "compile line.  "
+      "try_compile creates a CMakeList.txt "
+      "file on the fly that looks like this:\n"
+      "  add_definitions( <expanded COMPILE_DEFINITIONS from calling "
+      "cmake>)\n"
+      "  include_directories(${INCLUDE_DIRECTORIES})\n"
+      "  link_directories(${LINK_DIRECTORIES})\n"
+      "  add_executable(cmTryCompileExec sources)\n"
+      "  target_link_libraries(cmTryCompileExec ${LINK_LIBRARIES})\n"
+      "In both versions of the command, "
+      "if OUTPUT_VARIABLE is specified, then the "
+      "output from the build process is stored in the given variable. "
+      "The success or failure of the try_compile, i.e. TRUE or FALSE "
+      "respectively, is returned in "
+      "RESULT_VAR. CMAKE_FLAGS can be used to pass -DVAR:TYPE=VALUE flags "
+      "to the cmake that is run during the build. "
+      "Set variable CMAKE_TRY_COMPILE_CONFIGURATION to choose a build "
+      "configuration."
+      ;
+    }
+
+  cmTypeMacro(cmTryCompileCommand, cmCoreTryCompile);
+
+};
+
+
+#endif