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I am experimenting with Xcode 6 Beta, and noticed armv7s disappeared from Standard Architectures. I did scan through Xcode 6 release notes, but didn't see changes on that. Can anyone confirm this change?
Xcode 5.1.1:
Xcode 6 Beta: 
Update
There is a thread on iOS 8 Beta forum discussing this topic as well. https://devforums.apple.com/thread/244407?tstart=0
Also note @ThomasW had an answer on adding armv7s to Architectures.
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Basically, you have to exclude arm64 for the simulator architecture, both from your project and the Pod project. To do that, navigate to Build Settings of your project and add Any iOS Simulator SDK with value arm64 inside Excluded Architecture.
The "build active architecture only" setting causes everything except the current Mac's architecture to be ignored (and the current one is of course valid), hiding the problem. Instead, you should look up a row or two in the settings, and change the "Architectures" setting to "Standard".
VALID_ARCHS (Valid Architectures) Space-separated list of identifiers. Specifies the architectures for which the binary may be built. During the build, this list is intersected with the value of ARCHS build setting; the resulting list specifies the architectures the binary can run on.
ONLY_ACTIVE_ARCH (Build Active Architecture Only) Description: Boolean value. Specifies whether the product includes only object code for the native architecture.
I also filed a bug on this and got a reply stating that this is intentional. If you want to build for armv7s you have to add the architecture manually. I have now idea why this change was made. I'll update this if I get additional information.
Update from the dev forums:
The reason for including armv7s would be marginal backward compatibility. But the general differences between armv7 and armv7s instruction sets are minor. So if you choose not to include armv7s, the targeted armv7 machine code still runs fine on 32 bit A6 devices, and hardly one will notice performance gap.
-- Zhou Yang
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