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diff --git a/clang/include/clang/Basic/Version.h b/clang/include/clang/Basic/Version.h
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+++ b/clang/include/clang/Basic/Version.h
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+//===- Version.h - Clang Version Number -------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This header defines version macros and version-related utility functions
+// for Clang.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_BASIC_VERSION_H
+#define LLVM_CLANG_BASIC_VERSION_H
+
+#include "llvm/ADT/StringRef.h"
+
+#include "clang/Basic/Version.inc"
+
+/// \brief Helper macro for CLANG_VERSION_STRING.
+#define CLANG_MAKE_VERSION_STRING2(X) #X
+
+#ifdef CLANG_VERSION_PATCHLEVEL
+/// \brief Helper macro for CLANG_VERSION_STRING.
+#define CLANG_MAKE_VERSION_STRING(X,Y,Z) CLANG_MAKE_VERSION_STRING2(X.Y.Z)
+
+/// \brief A string that describes the Clang version number, e.g.,
+/// "1.0".
+#define CLANG_VERSION_STRING \
+  CLANG_MAKE_VERSION_STRING(CLANG_VERSION_MAJOR,CLANG_VERSION_MINOR, \
+                            CLANG_VERSION_PATCHLEVEL)
+#else
+/// \brief Helper macro for CLANG_VERSION_STRING.
+#define CLANG_MAKE_VERSION_STRING(X,Y) CLANG_MAKE_VERSION_STRING2(X.Y)
+
+/// \brief A string that describes the Clang version number, e.g.,
+/// "1.0".
+#define CLANG_VERSION_STRING \
+  CLANG_MAKE_VERSION_STRING(CLANG_VERSION_MAJOR,CLANG_VERSION_MINOR)
+#endif
+
+namespace clang {
+  /// \brief Retrieves the repository path (e.g., Subversion path) that
+  /// identifies the particular Clang branch, tag, or trunk from which this
+  /// Clang was built.
+  std::string getClangRepositoryPath();
+
+  /// \brief Retrieves the repository path from which LLVM was built. Supports
+  /// LLVM residing in a separate repository from clang.
+  std::string getLLVMRepositoryPath();
+
+  /// \brief Retrieves the repository revision number (or identifer) from which
+  ///  this Clang was built.
+  std::string getClangRevision();
+
+  /// \brief Retrieves the repository revision number (or identifer) from which
+  /// LLVM was built. If Clang and LLVM are in the same repository, this returns
+  /// the same string as getClangRevision.
+  std::string getLLVMRevision();
+
+  /// \brief Retrieves the full repository version that is an amalgamation of
+  ///  the information in getClangRepositoryPath() and getClangRevision().
+  std::string getClangFullRepositoryVersion();
+
+  /// \brief Retrieves a string representing the complete clang version,
+  ///   which includes the clang version number, the repository version,
+  ///   and the vendor tag.
+  std::string getClangFullVersion();
+
+  /// \brief Retrieves a string representing the complete clang version suitable
+  ///   for use in the CPP __VERSION__ macro, which includes the clang version
+  ///   number, the repository version, and the vendor tag.
+  std::string getClangFullCPPVersion();
+}
+
+#endif // LLVM_CLANG_BASIC_VERSION_H