title: I'm trying to make a makefile that supports c++11
body: <p>It's a simple thing but I'm having trouble making a makefile.</p>
  <p>It needs to support c++11 and I should be able to call it with ./radixsort in the linux terminal.</p>
  <p>It just has two files, main.cpp and header.h</p>
  <p>How would I write this up? So far every attempt doesn't work.</p>
  <p>my last attempt:</p>
  <pre class="lang-none prettyprint-override"><code>radixsort: main.cpp header.h
       g++ -std=c++11 radixsort main.cpp header.h
  </code></pre>