What Is Armv7S

What is armv7s?

The iPhone 5 will ship with and only run iOS 6.0. To coincide with the launch of iOS 6.0, Apple has seeded developers with a newer version of its development tools. Xcode 4.5 makes two major changes: it drops support for the ARMv6 ISA (used by the ARM11 core in the iPhone 2G and iPhone 3G), keeps support for ARMv7 (used by modern ARM cores) and it adds support for a new architecture target designed to support the new A6 SoC: armv7s.

what is the difference between ARM7 and ARM7s

Yes you are right about armv7s is about the iPhone 5. Here some summary info I found on the web:

ARMv6 ISA (used by the ARM11 core in the iPhone 2G and iPhone 3G)
ARMv7 (used by modern ARM cores, iPhone 3GS, iPhone 4 and 4S)
ARMv7s (new A6 SoC for iPhone 5).

Ref: There and there.

What is the advantage of using armv7s support In Valid Architecture?

Surprisingly there weren't a lot of differences in the machine code produced for the two different architectures; overall, the armv7s code does not look much different from the armv7 code. However, there were two specific differences that caught my eye.

The first difference affects integer division. The armv7s architecture has two new integer division instructions that aren't present on the armv7 architecture. These integer division instructions are implemented as a function on the armv7 that is at least an order of magnitude slower than the equivalent instruction on the armv7s. Integer division is common in applications (it's called in over a hundred places in Geekbench) so these new instructions should provide a significant increase in performance to all applications.

The second difference affect floating point arithmetic. Xcode uses different floating point arithmetic instructions for the armv7s than for the armv7. The instructions Xcode uses for the armv7s combine several operations into one instruction which should make them more efficient than the several independent instructions that Xcode uses for the armv7. Surprisingly these combined floating point instructions are present in the armv7 architecture but are unused by Xcode. It's unclear why this is the case. For armv7s these combined instructions represent a small proportion of all floating point instructions, so while they will probably provide an advantage it's hard to determine how much of an impact they will have.

There are other differences between the armv7 and the armv7s code, but they're minor in comparison to the integer division and the floating point arithmetic changes outlined above. How much will applications benefit from having an armv7s build? It's hard to say just from examining the generated code, but if you're a developer I think it's worth the time and the effort to ship an armv7s build of your application, especially if your application makes any use of floating point operations.

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Difference between armv7 and armv7s

VALID_ARCHS = arm64 armv7 armv7s not generating any armv7s

XCode has dropped support for armv7s since XCode 6 I think, the ${ARCHS_STANDARD} now only include armv7, arm64 and simulator will include i386, x86_64, so your fat static library/framework will only include them.

To support armv7s, add it under ${ARCHS_STANDARD} in Architectures field and build again.

arm64 armv7 armv7s Architectures settings

Yes. You can set both architectures for your above criteria. But problem is, you should handle code for both cases(32-bit & 64-bit).

Note:

Additional Notes for you.

You can support from Minimum IOS 5.1
You can use Xcode 5.0.1 with IOS 7 base SDK

Is ARMV7s mandatory for app store publication?

You can remove armv7s. armv7 and arm64 are enough. In fact, in Xcode 6.2 these are now the Standard architectures. If that's not an endorsement, I don't know what is.

when should i build app with armv7s support?

Ran into the same issue when updating my app on the store, I clearly remember when the last version of the app was submitted it had both armv7 and armv7s architectures with deployment target OS 4.3. Today when updating the very same app the error came up.

Finally I tried to upload the binary using Application Loader and it was successfully uploaded to the store, so probably there is some recent validation in place by apple when submitting using Organizer.

To upload the binary using Application Loader Goto Organizer > Right Click on Archive > Reveal in Finder.
Right Click the Archive file > Show Archive Content

Go to Products > Application > [Your APP.app]

Compress [Your APP.app] and upload using Application Loader.

hope this helps :)

How is the iPhone 5 armv7s processor different from its predecessors?

AnandTech has an analysis of the new CPU: http://www.anandtech.com/show/6292/iphone-5-a6-not-a15-custom-core

The main difference is apparently that ARMv7s has VFPv4 support (but you should read the full article, it's very thorough).

The cpu is backwards compatible, it will be able to execute apps compiled for both ARMv6 and ARMv7.