What version of LLVM and Clang is available in XCode 4.2?

What version of LLVM and Clang is available in XCode 4.2? I have searched a lot to try to find this information and the only thing i 开发者_Go百科have seen is that it could be LLVM 3.0

The version of llvm-gcc and clang in Xcode is not related to llvm.org releases. They are branched from a random development version sometime in the lifetime of the development of that Xcode release. If you're looking to know what features are available in Clang, please make use of the __has_feature capability: http://clang.llvm.org/docs/LanguageExtensions.html#feature_check