title: Set GCC path in makefile
body: <p>Whenever I am building my package it uses <code>/usr/bin/g++</code> (system compiler). 
  I want to build my package with C++11 constructs. I have tried <code>-std=c++11</code> option but with system compiler it says unrecognized option.
  I want to build my package from a different <code>gcc</code> compiler which will get downloaded as part of my package dependency.</p>
  
  <p>So, how can I specify the location of <code>gcc</code> compiler in Makefile?</p>