title: how to define -std=c++11 as default in g++
body: <p>I'm using some features in my C++ programs that I need <code>-std=c++11</code> option set in g++</p>
  
  <p>Is it possible set this option as a default and don't be necessary use this all time I compile it?</p>
  
  <p>Or how to set this in Makefile.</p>