Xcode - Error creating LLDB target

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Warning: Error creating LLDB target at path '/Users/xxx/Library/Developer/Xcode/DerivedData/xxxx'- using an empty LLDB target which can cause slow memory reads from remote devices.

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Did you use Architectures=$(ARCHS_STANDARD_32_BIT) and run your app on a 64 bit device? (iPhone 5S or iPhone 5S simulator)

Apple seems to be stricter with apps which don't support 64bit. So if there is no specific reason, I think it's better to include arm64 in your build architecture

NOTE ABOUT 64-BIT ARCHITECTURE
An app extension target must include the arm64 architecture in its Architectures build settings or it will be rejected by the App Store. Xcode includes this architecture with its “Standard architectures” setting when you create a new app extension target.
If your containing app target links to an embedded framework, the app must also include the arm64 architecture or it will be rejected by the App Store.
For more information about 64-bit development, see 64-Bit Transition Guide for Cocoa Touch or 64-Bit Transition Guide for Cocoa, depending on your target platform.

Source:https://developer.apple.com/library/prerelease/ios/documentation/General/Conceptual/ExtensibilityPG/ExtensionCreation.html#//apple_ref/doc/uid/TP40014214-CH5-SW1

http://stackoverflow.com/questions/25088252/xcode-error-creating-lldb-target

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