what is the difference between ARM7 and ARM7s

Question

I realized that xcode 4.5 comes with ARM7 and ARM7s in valid architectures. I got a link error. After sometime digging, I removed arm7s and things start to work again.

I need to understand what is ARM7s, I am assuming this is related to iPhone5?

Thank you.

Answer 1

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.