title: Compiled mono missing default .NET libraries - System.Object is not defined or imported
body: <p>I've compiled mono on OS X Mavericks following the guide located here: <a href="http://www.mono-project.com/docs/compiling-mono/mac/" rel="noreferrer">http://www.mono-project.com/docs/compiling-mono/mac/</a></p>
  
  <p>Now when I compile my application using xbuild I'm getting the following errors:</p>
  
  <pre><code>CSC: error CS0518: The predefined type `System.Object' is not defined or imported
  CSC: error CS0518: The predefined type `System.ValueType' is not defined or imported
  CSC: error CS0518: The predefined type `System.Attribute' is not defined or imported
  CSC: error CS0518: The predefined type `System.Int32' is not defined or imported
  CSC: error CS0518: The predefined type `System.UInt32' is not defined or imported
  CSC: error CS0518: The predefined type `System.Int64' is not defined or imported
  CSC: error CS0518: The predefined type `System.UInt64' is not defined or imported
  CSC: error CS0518: The predefined type `System.Single' is not defined or imported
  CSC: error CS0518: The predefined type `System.Double' is not defined or imported
  CSC: error CS0518: The predefined type `System.Char' is not defined or imported
  CSC: error CS0518: The predefined type `System.Int16' is not defined or imported
  CSC: error CS0518: The predefined type `System.Decimal' is not defined or imported
  CSC: error CS0518: The predefined type `System.Boolean' is not defined or imported
  CSC: error CS0518: The predefined type `System.SByte' is not defined or imported
  CSC: error CS0518: The predefined type `System.Byte' is not defined or imported
  CSC: error CS0518: The predefined type `System.UInt16' is not defined or imported
  CSC: error CS0518: The predefined type `System.String' is not defined or imported
  CSC: error CS0518: The predefined type `System.Enum' is not defined or imported
  CSC: error CS0518: The predefined type `System.Delegate' is not defined or imported
  CSC: error CS0518: The predefined type `System.MulticastDelegate' is not defined or imported
  CSC: error CS0518: The predefined type `System.Void' is not defined or imported
  CSC: error CS0518: The predefined type `System.Array' is not defined or imported
  CSC: error CS0518: The predefined type `System.Type' is not defined or imported
  CSC: error CS0518: The predefined type `System.Collections.IEnumerator' is not defined or imported
  CSC: error CS0518: The predefined type `System.Collections.IEnumerable' is not defined or imported
  CSC: error CS0518: The predefined type `System.IDisposable' is not defined or imported
  CSC: error CS0518: The predefined type `System.IntPtr' is not defined or imported
  CSC: error CS0518: The predefined type `System.UIntPtr' is not defined or imported
  CSC: error CS0518: The predefined type `System.RuntimeFieldHandle' is not defined or imported
  CSC: error CS0518: The predefined type `System.RuntimeTypeHandle' is not defined or imported
  CSC: error CS0518: The predefined type `System.Exception' is not defined or imported
  </code></pre>
  
  <p>When I used the mono installer on OS X I never received any of these errors.</p>
  
  <p>(I'm building mono because I'm adding functionality to the .NET framework that wasn't completed)</p>
  
  <p>Result of running autogen.sh: <a href="https://gist.github.com/Geesu/149332f3f877c891d387" rel="noreferrer">https://gist.github.com/Geesu/149332f3f877c891d387</a>
  Result of running make: <a href="https://gist.github.com/Geesu/4296f7d4c6c368d6986d" rel="noreferrer">https://gist.github.com/Geesu/4296f7d4c6c368d6986d</a></p>