A Simple Clang Version Check Aug 6th, 2011 Supposedly it is the clang used by Xcode 4.1. 1 2 3 4 5 $ clang -v Apple clang version 2.1 (tags/Apple/clang-163.7.1) (based on LLVM 3.0svn) Target: x86_64-apple-darwin11.0.0 Thread model: posix