Define __cplusplus to 201103L when in (non-GNU) C++0x mode.

llvm-svn: 133437

1 files changed, 10 insertions, 3 deletions

diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index e1c394ea754..aefd1ea5b88 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -359,11 +359,18 @@ static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
   } else {
     if (LangOpts.GNUMode)
       Builder.defineMacro("__cplusplus");
-    else
-      // C++ [cpp.predefined]p1:
+    else {
+      // C++0x [cpp.predefined]p1:
+      //   The name_ _cplusplus is defined to the value 201103L when compiling a
+      //   C++ translation unit.
+      if (LangOpts.CPlusPlus0x)
+        Builder.defineMacro("__cplusplus", "201103L");
+      // C++03 [cpp.predefined]p1:
       //   The name_ _cplusplus is defined to the value 199711L when compiling a
       //   C++ translation unit.
-      Builder.defineMacro("__cplusplus", "199711L");
+      else
+        Builder.defineMacro("__cplusplus", "199711L");
+    }
   }
 
   if (LangOpts.ObjC1)