er.apple.com/swift/blog/?id=25">nullability</a> keywords when building with older versions of clang that donâ€™t support it. (kirb)</li>
  <li>Building for iOS Simulator now disables linking Substrate by default, allows linking against OS X binaries, and builds for only x86_64 by default (rather than both i386 and x86_64) when building for iOS 8.0 or newer. (kirb)</li>
</ul>

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