Make sure you have installed Xcode command line tools. Check the c++ version to make sure it is Clang 4.0+
$ c++ --version
Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)
Target: x86_64-apple-darwin13.1.0
Thread model: posix
Then create an alias for c++11 installation in your env.sh file.
alias cppcompile='c++ -std=c++11 -stdlib=libc++'
Then you can run all cpp file directly using cppcompile main.cpp and it will use c++11 so no errors in the case of using vectors, auto, sets etc.