title: C++03 library with C++11 source code
body: <p>If I have library that was written in C++03 and I compile it to a static library, can I then use it in C++11? Also is the reverse possible ( C++11 static library with C++03 ).</p>
  
  <p><em>Update:</em>
  The compiler I am using is clang or LLVM</p>