title: How to install GCC 5.1 on Linux (Ubuntu)
body: <p>I'd like to experiment with the new GCC 5.1 C++ compiler on Ubuntu.</p>
  
  <p>How can I install GCC 5.1 on Ubuntu?</p>
  
  <p>I'd prefer some form of pre-built executable that I could just download and install, instead of downloading GCC's sources and building the whole GCC 5.1 from them.</p>
  
  <p>Moreover, since I read libstdc++'s ABI changed in GCC 5, must a new version of libstdc++ be installed with GCC 5.1, too?</p>