Re: ARM64 and -mios-version-min=7.0?
Re: ARM64 and -mios-version-min=7.0?
- Subject: Re: ARM64 and -mios-version-min=7.0?
- From: Jeffrey Walton <email@hidden>
- Date: Sat, 12 Oct 2013 21:36:24 -0400
On Sat, Oct 12, 2013 at 9:27 PM, Chris Lattner <email@hidden> wrote:
>
> On Oct 12, 2013, at 3:44 PM, Jeffrey Walton <email@hidden> wrote:
>> When I build Crypto++ from the command line, ARM64 fails without
>> -mios-version-min=7.0.
>>
>> clang++ -DNDEBUG -g -Os -pipe -fPIC -DCRYPTOPP_DISABLE_ASM -arch arm64
>
> This is a known (and short term) limitation. The iOS 7 release notes:
> https://developer.apple.com/library/ios/releasenotes/General/RN-iOSSDK-7.0/
>
> say:
>
> "64-Bit Runtime
> Notes
>
> You can submit 64-bit apps for iOS 7 today that take advantage of the power of the iPhone 5s. Xcode can build your app with both 32-bit and 64-bit binaries included so it works across all devices running iOS 7. If you wish to continue to support iOS 6 then you need to build for 32-bit only. Next month we will be making changes so that you can create a single app binary that supports 32-bit on iOS 6, as well as 32-bit and 64-bit on iOS 7."
>
Thanks Chris.
Forgive my ignorance, but what precisely is this saying?
If I build Crypto++ separately for ARMv7, ARMv7S and ARM64, I can use
lipo to combine the architectures into a fat binary. So I know (or
believe) I can build the multi-arch library.
Or will there be a ARM64-32 and ARM63-64, too? To me, its all just ARM64.
Jeff
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