Re: Proper value for os.arch on Apple Silicon

[Jeremy Sequoia via macports-dev]

It is arm64.

> On Jun 22, 2020, at 9:50 PM, Ryan Schmidt <ryandes...@macports.org> wrote:
> 
> Now that Apple has announced that Macs will have ARM processors [1], what is 
> the proper value for ${os.arch} on such systems?
> 
> MacPorts base currently knows two values of ${os.arch}: "powerpc" is used on 
> all 32-bit and 64-bit PowerPC systems while "i386" is used on all 32-bit and 
> 64-bit Intel systems.
> 
> I'm not necessarily asking what value MacPorts currently prints for this 
> variable on an Apple Silicon Developer Transition Kit machine, but rather 
> what value it should print. We may need add code to MacPorts base to make 
> this happen, just as there is already code to produce the two existing values:
> 
> 
>    # set up platform info variables
>    set os_arch $tcl_platform(machine)
>    if {$os_arch eq "Power Macintosh"} {set os_arch "powerpc"}
>    if {$os_arch eq "i586" || $os_arch eq "i686" || $os_arch eq "x86_64"} {set 
> os_arch "i386"}
> 
> 
> Should it be "arm"?
> 
> Whatever we choose will impact how ports are written so we need to make a 
> choice and then stick to it.
> 
> I also need to know so that I can modify mprsyncup to start generating a 
> portindex on our server for such systems.
> 
> 
> [1] 
> https://www.apple.com/newsroom/2020/06/apple-announces-mac-transition-to-apple-silicon/
>