title: React Native 0.64 won't build iOS app after updating Xcode to 12.5 and iOS to 14.5
body: <p>After upgrading Xcode to 12.5 and iOS to 14.5, I can't run the iOS app on a real device nor in the simulator.</p>
  <p>After running <code>npm run ios</code>, I get this message:</p>
  <pre><code>The following build commands failed:
          CompileC .../Build/Intermediates.noindex/Pods.build/Debug-iphonesimulator/Flipper-Folly.build/Objects-normal/x86_64/DistributedMutex.o /Users/guilherme/Documents/Dood/ios/Pods/Flipper-Folly/folly/synchronization/DistributedMutex.cpp normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler
  </code></pre>
  <p>If I try to run the app on a real device using Xcode, this is the error I get (related to Flipper-Folly):</p>
  <pre><code>.../ios/Pods/Headers/Private/Flipper-Folly/folly/synchronization/DistributedMutex-inl.h:1051:5: 'atomic_notify_one&lt;unsigned long&gt;' is unavailable
  </code></pre>
  <p>Ideas? Thanks!</p>
  <p><strong>UPDATE:</strong></p>
  <p>React native has been updated to 0.64.1. You can now just change your react-native dependency to this version within your package.json file, then run <code>npm install</code></p>