title: yocto fails to build mono-xsp
body: <p>everyone !</p>
  
  <p>I've build a system using <strong>Yocto Project</strong> successfully, including meta-mono etc. But now that I need to add <strong>mono-xsp</strong> to that system, and the build for this package fails.
  I've tried the same build on Ubuntu18 and Centos7 hosts with the same results.
  It appears to me that the actual target platform (iMX6UL / Zedboard / x86) does not matter as I'm getting the same result on all of these.</p>
  
  <p><a href="https://drive.google.com/open?id=1FX78R7c9G-iQV0tDbScE7YhYfO6PH6t-" rel="nofollow noreferrer">build_log</a></p>
  
  <p><a href="https://drive.google.com/open?id=1qCnHBkqjmFnNQEq9iTbUryTXjfxU5cNB" rel="nofollow noreferrer" >error_log</a></p>
  
  <p>Could anyone provide assistance in solving this problem?</p>