title: Downgrade gcc/g++ in Ubuntu?
body: <p>I am trying to downgrade gcc/g++ to 4.8.1.  I tried two options, both with problems. </p>
  
  <ol>
  <li><p>use <code>sudo apt install gcc-4.8 g++-4.8</code>.  This option will install 4.8.5 etc. I wonder if there is any way to specify 4.8.1. <code>sudo apt install gcc-4.8.1 g++-4.8.1</code> does not work as it will complain that <em><code>"unable to locate package gcc-4.8.1"</code></em>. </p></li>
  <li><p>Download "gcc-4.8.1" and follow the official steps ("configure, make, make install") but it fails at the make step with errors "CXXABI_1.3.8" not found. </p></li>
  </ol>
  
  <p>I found another solution but I am not sure whether it is desirable (" <a href="https://stackoverflow.com/questions/38417663/install-gcc-4-8-1-from-source-code-on-ubuntu-16-04">install gcc-4.8.1 from source code on Ubuntu-16.04</a>"). </p>
  
  <p>How do I downgrade gcc/g++ to 4.8.1 in Ubuntu?</p>
  
  <p>Many thanks. </p>