title: Android ndk-build failed
body: <p>I'm trying to debug .so library, using NDK for Android.</p>
  
  <p>I'm able to build .so library, using <code>ndk-build</code>. But when I want to debug my library,
  I set <code>ndk-build NDK_DEBUG = 1</code> and receive following error: make: <em>*</em> empty variable name.  Stop.</p>
  
  <p>And also I receive the error: <code>Unable to launch cygpath. Is Cygwin on the path?</code>
  Appreciate any help, thanks</p>