Move -fms-extensions predefined macros into InitPreprocessor

If someone on Linux asks for -fms-extensions, there's no reason not to
define the feature test macros that MSVC defines.

llvm-svn: 206413

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index a86fe514261..95d9e510f89 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -507,7 +507,19 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
     Builder.defineMacro("__private_extern__", "extern");
   }
 
+  if (LangOpts.MSCVersion != 0)
+    Builder.defineMacro("_MSC_VER", Twine(LangOpts.MSCVersion));
+
   if (LangOpts.MicrosoftExt) {
+    // Define feature support macros that MSVC provides.
+    Builder.defineMacro("_MSC_EXTENSIONS");
+
+    if (LangOpts.CPlusPlus11) {
+      Builder.defineMacro("_RVALUE_REFERENCES_V2_SUPPORTED");
+      Builder.defineMacro("_RVALUE_REFERENCES_SUPPORTED");
+      Builder.defineMacro("_NATIVE_NULLPTR_SUPPORTED");
+    }
+
     if (LangOpts.WChar) {
       // wchar_t supported as a keyword.
       Builder.defineMacro("_WCHAR_T_DEFINED");