title: Undefined symbols for architecture arm64 with .a Library Xcode in Swift Project
body: <p>I have an Static C Library ohNetCoreFatEntotem.a and I have imported it into an existing projects originally written in ObjctiveC. Now the project is almost Swift.</p>
  
  <p>When I try to build the project I get the following error:</p>
  
  <p><a href="https://i.stack.imgur.com/2kWZP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2kWZP.png" alt="enter image description here"></a></p>
  
  <p>The Library is a fat Library compiled for arm64, armv7 and x86</p>
  
  <p>What does this error mean?</p>
  
  <p>Thank you</p>
  
  <p><strong>EDITED</strong>
  I might not have enough deep knowledge about compilers and libraries... Sorry for that.</p>
  
  <p>I have build a library from <a href="https://github.com/openhome/ohNet" rel="nofollow noreferrer">https://github.com/openhome/ohNet</a> and I generated the compressed file like the one you can find <a href="https://linn-artifacts-public.s3-eu-west-1.amazonaws.com/artifacts/ohNet/ohNet-1.10.2344-iOs-arm64-Debug.tar.gz" rel="nofollow noreferrer">Here</a>.</p>
  
  <p>The structure is:</p>
  
  <p><a href="https://i.stack.imgur.com/5BEyF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5BEyF.png" alt="enter image description here"></a></p>
  
  <p>I created a Fat library with all the fileLib.a from different structures that also can be found <a href="https://s3-eu-west-1.amazonaws.com/linn-artifacts-public/index.html#artifacts/ohNet/" rel="nofollow noreferrer">Here</a>.</p>
  
  <p>I have a created a folder with the fat libraries and the headers.
  <a href="https://i.stack.imgur.com/BiCKZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BiCKZ.png" alt="enter image description here"></a></p>
  
  <p>How do I Declare them in xcode?</p>