Clang 3.1 and C++11 support status

Question

From clang's C++11 support status website, http://clang.llvm.org/cxx_status.html , it says, "Initializer List" and "Lambda Expression" are all supported starting from version 3.1.

However, using LLVM/Clang trunk (3.2), compiling against initializer list and lambda expression will yield error messages.

Does anyone know if Clang >3.1 supports those features?

Answer 1

By default, clang++ will not enable the C++11 features - you have to pass an additional flag during compilation.

clang++ -std=c++11 [input files...] 

Or

# enables some additional C++11 extensions GCC has clang++ -std=gnu++11 [input files...]  

Additionally, you can switch between using libstdc++ and Clang's own libc++, which are different implementations of the C++ standard library. libc++ in some cases might have a better implementation of the C++11 standard than your existing libstdc++ library.

# uses clang's C++ library in C++98 mode clang++ -stdlib=libc++ [input] # uses clang's C++ library  # uses clang's C++ library and enables C++11 mode clang++ -stdlib=libc++ -std=c++11 [input]  

The latter is important if you're using Clang in an environment with an outdated version of libstdc++ (like Mac OSX), but note that the two C++ libraries are not compatible with each other, so you would have to rebuild any dependencies against libc++ if you were to use that.