title: Android ndk r15b - Posix_memalign () undeclared identifier
body: <p>I am new to Android project. For my new task I need to build a project for Android platform.  I am able to generate make file successfully​ using <code>cmakelists.txt</code> for Android using Android ndk and it's corresponding <code>android.toolchain.cmake</code> file. When I tried to run <code>makefile</code>. I am facing: </p>
  
  <blockquote>
    <p>posix_memalign() undeclared identifier issue. </p>
  </blockquote>
  
  <p>Here c and c++ compiler are clang which is default toolchain of Android ndk. I don't know how to fix this issue. Please help me to fix this issue.</p>
  
  <p>I am using Windows os. I generated msys makefile.</p>