title: Binding Native C library in Xamarin project
body: <p>I am currently have an issue of binding c library. I am following the introduction from this link to bind C library in Xamarin project: <a href="https://www.youtube.com/watch?v=ZUoPLcmnf1o" rel="nofollow noreferrer">https://www.youtube.com/watch?v=ZUoPLcmnf1o</a> (It is a Xamarin Unversity Turtorial regarding binding c/c++ library, I literally did the same thing except those caused by environment differences ). However, I am stuck at the last step: using functions from the c library in the Xamarin project, it always shows "Native linking failed, undefined symbol *". I have tried to solve it for around 2 days, but did not go any further, may I ask for your help? Thank you very much in advance.</p>
  
  <p>Environment: iOS: macOS High Sierra, xcode: 10.1, SDK: 12.1, IDE: Visual Studio for Mac</p>
  
  <p>Does anyone has followed the same tutorial before and know how to do it? I am totally stuck on this. Any suggestion welcome.</p>