title: Python3.5 installation fails: cannot open libpython3.5m.so.1.0
body: <p>I'm trying to install Python 3.5.2 on CentOS 7.  The build appears to succeed, but executing <strong>python3</strong> elicits</p>
  
  <pre><code>python3: error while loading shared libraries: libpython3.5m.so.1.0: cannot open shared object file: No such file or directory
  </code></pre>
  
  <p>I checked <a href="https://stackoverflow.com/questions/37757314/problems-installing-python-3-with-enable-shared">this question</a> as the only link that appeared to help.  <strong>ldd</strong> does show the file as missing, and it does not seem to exist anywhere, although <strong>/usr/lib/libpython3.5m.so</strong> exists.</p>
  
  <p>By any chance, is <strong>/usr/lib/libpython3.5m.so</strong> the correct file?  I have no problem making a link, but I don't want to shoot myself in the foot if it's wrong.  I also wonder whether there are related layers of yak fur waiting for me.  Perhaps I need to <strong>make clean</strong> and rebuild with other options?</p>