title: Ubuntu 14.04 install gcc-4.5 and g++4.5
body: <p>I'm trying to install gcc-4.5 and g++-4.5 on Ubuntu 14.04 <code>sudo apt-get install gcc-4.5 g++-4.5 gcc-multilib g++-multilib</code> but the following errors appeared:</p>
  
  <pre><code>Package gcc-4.5 is not available, but is referred to by another package.
  This may mean that the package is missing, has been obsoleted, or
  is only available from another source
  
  Package g++-4.5 is not available, but is referred to by another package.
  This may mean that the package is missing, has been obsoleted, or
  is only available from another source
  
  E: Package 'gcc-4.5' has no installation candidate
  E: Package 'g++-4.5' has no installation candidate
  </code></pre>
  
  <p>Can anyone tell me what I need to do?</p>