title: Apple mach-o Linker (id)Error in Xcode when trying to build the app on the iPhone
body: <p>I am desperately searching for a solution. I am currently trying to make a test app with Unity AR Foundation for an apple device (iphone 8 software 13.4 and my macbook - sierra) since i don't want to upgrade anything i downloaded the Xcode 9.2 and the building process in Xcode ends up showing tones of warnings and this:</p>
  
  <p><a href="https://i.stack.imgur.com/gnMhE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gnMhE.png" alt="enter image description here"></a> </p>
  
  <p>please, help, i have searched the internet for an answer but nothing works for me. Maybe also because I am new to all this. Would appreciate any help!</p>
  
  <p>P.S.:if it helps, i've been following this tutorial -
  <a href="https://www.youtube.com/watch?v=eu_eG0eTFlA&amp;list=PL6VJLOFcTt7awvyIGIbLLPOBrW6-Y1R-J&amp;index=3&amp;t=0s" rel="nofollow noreferrer">https://www.youtube.com/watch?v=eu_eG0eTFlA&amp;list=PL6VJLOFcTt7awvyIGIbLLPOBrW6-Y1R-J&amp;index=3&amp;t=0s</a></p>