title: How to change the gcc version on the Mac
body: <p>Recently, I want to use a database which need gcc/g++ +4.3 in the Mac. the default gcc version is 4.2.1, like this:</p>
  
  <p><a href="https://i.stack.imgur.com/vPkp7.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vPkp7.jpg" alt="enter image description here"></a></p>
  
  <p>So I use the brew to install the latest gcc 5.3:</p>
  
  <p><a href="https://i.stack.imgur.com/U8mK6.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/U8mK6.jpg" alt="enter image description here"></a></p>
  
  <p>But how to change the gcc version to the 5.3?</p>