title: warning LNK4197: export 'PyInit_python_module_name' specified multiple times; using first specification
body: <p>I created some <code>Cython</code> files, and import them in a <code>Python</code> file using,</p>
  
  <pre><code>import pyximport
  pyximport.install()
  
  import Cython_Mod1
  import Cython_Mod2
  </code></pre>
  
  <p>When I run the <code>py</code> file, the <code>C</code> compiler (<code>VC++14</code>) generated the following errors</p>
  
  <pre><code>Cython_Mod1.obj : warning LNK4197: export 'PyInit_Cython_Mod1' specified multiple times; using first specification
  </code></pre>
  
  <p>for each <code>Cython</code>module.</p>
  
  <p>How to fix this and does it affect the performance or can be erroneous in the execution. </p>