FreeBSD/arm64 MACHINE/MACHINE_ARCH identification

[Michael Mitchell]

sent it too early...

the changes are good to match the industry standard. i find it a PIA when
people invent new terms 'cuz they can' and 'just to be different' :)

now, as an side note, ARM does use the term aarch32 as a roughly the
synonym for armv7 instruction set, its just not as widely established...
any takers? :)



On Wed, Feb 11, 2015 at 11:27 AM, Michael Mitchell <mmitchel at gmail.com>
wrote:

> 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?
>>> _______________________________________________
>>> freebsd-arm at freebsd.org mailing list
>>> http://lists.freebsd.org/mailman/listinfo/freebsd-arm
>>> To unsubscribe, send any mail to "freebsd-arm-unsubscribe at freebsd.org"
>>>
>>>
>> _______________________________________________
>> freebsd-arm at freebsd.org mailing list
>> http://lists.freebsd.org/mailman/listinfo/freebsd-arm
>> To unsubscribe, send any mail to "freebsd-arm-unsubscribe at freebsd.org"
>>
>
>