RE: Patch for iOS/tvOS/watchOS simulator support in config.sub

[epirat07]

> Please find attached a patch adding support for:
>
> * Normalising the watchOS CPU architecture descriptor used by Apple 
> (arm64_32) * Accepting the -simulator suffix for descriptors for iOS, tvOS 
> and watchOS.
> The following is the list of compiler triples generated by Apple’s clang 
> toolchains for iOS 12.0, tvOS 9.0, and watchOS 4.0:
>
> arm64-apple-ios12.0
> x86_64-apple-ios12.0-simulator
> arm64-apple-ios12.0-simulator
> arm64-apple-tvos9.0
> x86_64-apple-tvos9.0-simulator
> arm64-apple-tvos9.0-simulator
> arm64_32-apple-watchos4.0
> arm64-apple-watchos4.0-simulator
>
> The -simulator suffix is significant because iOS devices and iOS simulators 
> have a different ABI. It is therefore essential that these can be 
> differentiated in a compiler triple.
>
> A patch including these changes was submitted on Aug 31 2023; this patch 
> appears to have been partially applied in commit b8c9b833, but these two 
> changes were omitted. I received no correspondence explaining why the patch 
> was only partially applied; I am therefore submitting them again in the hope 
> they will be merged.       

Ping on that for me as well, as it would make building properly for iOS much 
easier
when able to specify the actual triplet that is used by LLVM as well.

>
> Yours
> Russell Keith-Magee %-)