title: LINK : fatal error LNK1181: cannot open input file 'opencv_world341d.lib'
body: <p>I have found two similar questions <a href="https://stackoverflow.com/questions/3132680/linking-link-fatal-error-lnk1181-cannot-open-input-file-libgsl-a">this</a> and <a href="https://stackoverflow.com/questions/18352101/link-fatal-error-lnk1181-cannot-open-input-file-libclamav-lib">this</a> .
  But they both use opencv, and opencv indeed provide the corresponding lib. I don't use opencv, and my project is very simple, just hello world.I have changed project default configuration like this</p>
  
  <p><img src="https://i.stack.imgur.com/WUsVa.png" alt="enter image description here">
  except for these configurations, others all take defaults</p>
  
  <p>I just want to test my project configuration，that works find for win32 debug and release. But not work for x64 debug and release, they all tell me <code>LINK : fatal error LNK1104: cannot open file 'opencv_world341d.lib'</code>
  I indeed know my project does not use any opencv lib, but why they tell me I need to use opencv_world341d.lib
  my code</p>
  
  <pre><code>#include&lt;iostream&gt;
  using namespace std;
  int main()
  {
      cout &lt;&lt; "hello world" &lt;&lt; endl;
  }
  </code></pre>