title: xamarin.ios architecture conditional compilation
body: <p>I need to compile Xamarin.iOS projects for all three architectures, ARM7, ARM7s and ARM64. As ARM7s gets obsolete, some components do not link, and in the way to make gracefull degradation, I need to have different code for ARM7s and normal devices, all within one ipa package</p>
  
  <p>Is something like this possible?</p>
  
  <pre><code>#if __ARM7s__
  //gracefull degradation
  #endif
  </code></pre>