FreeBSD/arm64 MACHINE/MACHINE_ARCH identification

[Michael Mitchell]

why swim upstream on a naming convention that is established?

when you say arm64 how many people are going to read that as amd64?

other than cosmetic, is there a technical rationale for picking a different
naming convention other than what the industry uses?

On Wed, Feb 11, 2015 at 10:21 AM, Nathan Whitehorn <nwhitehorn at freebsd.org>
wrote:

>
> On 02/11/15 09:41, Ed Maste wrote:
>
>> The FreeBSD/arm64 work in progress currently reports "arm64" for the
>> machine and processor type - i.e., uname -m and uname -p.
>>
>
> It would probably also be good if we had MACHINE = arm here.
> -Nathan
>
>
>  It seems that the official, awkward name aarch64 is broadly used
>> elsewhere - for example, in toolchain triples and autoconf tests.  To
>> save us grief in the future I think it is worth following suit:
>>
>> diff --git a/sys/arm64/include/param.h b/sys/arm64/include/param.h
>> index 5cd0445..525a0e7 100644
>> --- a/sys/arm64/include/param.h
>> +++ b/sys/arm64/include/param.h
>> @@ -43,10 +43,10 @@
>>   #define STACKALIGN(p)  ((uint64_t)(p) & ~STACKALIGNBYTES)
>>
>>   #ifndef MACHINE
>> -#define        MACHINE         "arm64"
>> +#define        MACHINE         "aarch64"
>>   #endif
>>   #ifndef MACHINE_ARCH
>> -#define        MACHINE_ARCH    "arm64"
>> +#define        MACHINE_ARCH    "aarch64"
>>   #endif
>>
>> I'm not proposing that we rename any of the source files.  I believe
>> this approach is consistent with the Debian project - they call it the
>> "arm64" port, but report aarch64 from uname.
>>
>> I believe it will be much easier for us to carry around any
>> special-case s/aarch64/arm64/ in the base system (if necessary) than
>> trying to teach third-party software that the FreeBSD 64-bit ARM
>> architecture is called arm64 instead of aarch64.
>>
>> Any objections or concerns?
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