可以对 Xcode 中的 arm 架构设置进行一些说明
据我所知，iPhone 5 将使用一种新架构，armv7s.我的项目具有作为 armv7 的有效架构，并且将 Build Active Architecture Only 设置为 true.由于现在商店中的每个应用程序都是为 armv6 和/或 armv7 构建的，我无法想象它不会在新 iPhone 上运行.那么会发生什么呢?它只是没有尽可能好地运行吗?
From what I've read, the iPhone 5 will use a new architecture, armv7s. My project had valid architectures as armv7, and had Build Active Architecture Only set to true. Since every app in the store right now is built for armv6 and/or armv7, I can't imagine that it will not run on the new iPhone. So what occurs? Does it just not run as well as it could?
我可以更好地解释正在发生的事情，以及一旦我重新构建并使用 armv7s 作为有效架构提交后会有什么不同.
I could just use a better explanation of what is occurring, and what would be different once I rebuild and submit with armv7s as a valid architecture.
首先，它是 armv7，而不是 arm7(是的，有区别).我似乎找不到任何关于细节的文档，但我想 armv7s 增加了对一些可选的 ARMv7 功能的支持，例如VFPv4/FMA 或 UDIV/SDIV 整数除法指令.除非您的应用涉及大量数学或图形，否则我无法想象这种差异会很明显.
First, it's armv7, not arm7 (yes, there is a difference). I can't seem to find any docs on the specifics, but I imagine armv7s adds support for some optional ARMv7 features, e.g. VFPv4/FMA, or UDIV/SDIV integer division instructions. I can't imagine the difference will be noticeable unless your app deals with a lot of math or graphics.
编辑:请参阅此链接对 LLVM 进行了更改以支持 armv7s.据我所知，它确实只是 VFPv4 和整数除法，加上对指令调度程序的一些更改.显然，CPU 代号是Swift".
Edit: see this link for the changes made to LLVM for armv7s support. From what I see, it's indeed just VFPv4 and integer divide, plus some changes to the instruction scheduler. Apparently the CPU codename is "Swift".