On OS X, simple C++ program gives incorrect results (which are a result of command-line options 'c++03' vs 'c++11')

Question

This simple program (when compiled on Linux) will CORRECTLY give two different answers based on whether it\'s compiled with -std=c++0x or not.

Problem:

Answer 1

It appears to be an issue with clang using libstdc++ by default rather than libc++. Compiling like this: clang++ -std=c++0x -stdlib=libc++ test.cpp results in the expected output.