title: xcode 7.3.1, getting error memcpy no member in namespace
body: <p>when trying to compile some c / c++ code for iOS.  Getting</p>
  
  <pre><code>No member named 'memcpy' in namespace 'std::__1'; did you mean 'wmemcpy'?
  </code></pre>
  
  <p>Have tried the compiler settings with no luck.  </p>
  
  <p>This is in the memory file in the tool chain.</p>