From 420d7ccbac0f499a6ff9595bdbfa99cd3376df22 Mon Sep 17 00:00:00 2001
From: Alp Toker <alp@nuanti.com>
Date: Fri, 6 Jun 2014 06:58:25 +0000
Subject: [PATCH] Devise a package-private means to determine the LLVM version
 string

This will unbreak clang vendor builds as a follow-up to r210238, now that we
can't poke into LLVM's private config.h (nor should the string be exposed by
llvm-config.h).

This hopefully removes for good the last include of LLVM's config.h.

llvm-svn: 210313
---
 clang/CMakeLists.txt                      | 3 +++
 clang/include/clang/Config/config.h.cmake | 3 +++
 clang/include/clang/Config/config.h.in    | 5 +++++
 clang/lib/Basic/Version.cpp               | 4 ++--
 clang/lib/Frontend/CompilerInstance.cpp   | 5 ++---
 5 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
index ece6bf8bce40..28f4e3fb81f6 100644
--- a/clang/CMakeLists.txt
+++ b/clang/CMakeLists.txt
@@ -156,6 +156,9 @@ if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )
   endif()
 
   set( CLANG_BUILT_STANDALONE 1 )
+  set(BACKEND_PACKAGE_STRING "LLVM ${LLVM_PACKAGE_VERSION}")
+else()
+  set(BACKEND_PACKAGE_STRING "${PACKAGE_STRING}")
 endif()
 
 find_package(LibXml2)
diff --git a/clang/include/clang/Config/config.h.cmake b/clang/include/clang/Config/config.h.cmake
index 8fa7a52a3e42..40a6cb3a2e3e 100644
--- a/clang/include/clang/Config/config.h.cmake
+++ b/clang/include/clang/Config/config.h.cmake
@@ -19,4 +19,7 @@
 /* Define if we have libxml2 */
 #cmakedefine CLANG_HAVE_LIBXML ${CLANG_HAVE_LIBXML}
 
+/* The LLVM product name and version */
+#define BACKEND_PACKAGE_STRING "${BACKEND_PACKAGE_STRING}"
+
 #endif
diff --git a/clang/include/clang/Config/config.h.in b/clang/include/clang/Config/config.h.in
index d66b4cf68dbc..450ea9b613e8 100644
--- a/clang/include/clang/Config/config.h.in
+++ b/clang/include/clang/Config/config.h.in
@@ -22,4 +22,9 @@
 /* Define if we have libxml2 */
 #undef CLANG_HAVE_LIBXML
 
+#undef PACKAGE_STRING
+
+/* The LLVM product name and version */
+#define BACKEND_PACKAGE_STRING PACKAGE_STRING
+
 #endif
diff --git a/clang/lib/Basic/Version.cpp b/clang/lib/Basic/Version.cpp
index ae32c011396d..c2b7753d4128 100644
--- a/clang/lib/Basic/Version.cpp
+++ b/clang/lib/Basic/Version.cpp
@@ -13,7 +13,7 @@
 
 #include "clang/Basic/Version.h"
 #include "clang/Basic/LLVM.h"
-#include "llvm/Config/config.h"
+#include "clang/Config/config.h"
 #include "llvm/Support/raw_ostream.h"
 #include <cstdlib>
 #include <cstring>
@@ -130,7 +130,7 @@ std::string getClangToolFullVersion(StringRef ToolName) {
 
   // If vendor supplied, include the base LLVM version as well.
 #ifdef CLANG_VENDOR
-  OS << " (based on LLVM " << PACKAGE_VERSION << ")";
+  OS << " (based on " << BACKEND_PACKAGE_STRING << ")";
 #endif
 
   return OS.str();
diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index a967c0ab5467..f5e2749a718d 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -16,6 +16,7 @@
 #include "clang/Basic/SourceManager.h"
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Basic/Version.h"
+#include "clang/Config/config.h"
 #include "clang/Frontend/ChainedDiagnosticConsumer.h"
 #include "clang/Frontend/FrontendAction.h"
 #include "clang/Frontend/FrontendActions.h"
@@ -709,9 +710,7 @@ bool CompilerInstance::ExecuteAction(FrontendAction &Act) {
   // Validate/process some options.
   if (getHeaderSearchOpts().Verbose)
     OS << "clang -cc1 version " CLANG_VERSION_STRING
-#ifdef PACKAGE_STRING
-       << " based upon " << PACKAGE_STRING
-#endif
+       << " based upon " << BACKEND_PACKAGE_STRING
        << " default target " << llvm::sys::getDefaultTargetTriple() << "\n";
 
   if (getFrontendOpts().ShowTimers)