title: MinGW g++ 4.8.1-4 doesn't recognize -std=c++14
body: <p>I installed MinGW by following their <a href="http://www.mingw.org/wiki/MinGW" rel="noreferrer">home page</a> to their <a href="http://sourceforge.net/projects/mingw/files/?source=navbar" rel="noreferrer">sourceforge</a> and using mingw-get-setup.exe. This installed g++ 4.8.1-4. GCC 4.8 is <a href="https://gcc.gnu.org/projects/cxx1y.html" rel="noreferrer">supposed to</a> support C++14 with a command-line switch, but I just get an "unrecognized option" error. </p>
  
  <p>Is this a bug with MinGW? With GCC? What can I do about it? <del>Since I know someone will ask, I want C++14 for its for-each loops. I'm using iterators for now, but for-each would improve both readability and writability.</del> </p>
  
  <p>EDIT: Found out my g++ build supports c++11, so I can use for-each. But still no luck on c++14 support.</p>