[OE-core] [PATCH] arch-arm64.inc: Do not append aarch64 in MACHINEOVERRIDES

[Jeremy Puhlman]

On 3/3/2020 5:39 AM, Adrian Bunk wrote:
> On Tue, Mar 03, 2020 at 11:59:58AM +0000, Peter Kjellerstedt wrote:
>> ...
>> Which corresponds to how it is done for armv7*.
>>
>> At least we currently rely on being able to do, e.g.:
>>
>> COMPATIBLE_MACHINE = "aarch64|armv7a|armv7ve"
>>
>> and if you remove "aarch64" from MACHINEOVERRIDES, we need a suitable
>> substitute.
> What does "aarch64" actually mean here?
> Does it also cover 32bit-only aarch64 CPUs?
>
> Similar to x86 there are 3 ABIs, and aarch64ilp32 is different from aarch32.
>
> Different from x86, there is no ABI that is available in all aarch64 CPUs.
> They can be 32bit-only or 64bit-only, and aarch32 support is optional.

In our past work with ilp32, aarch64 usually covered both because in 
general the abi's have more in common then
they are different. If something specific for ilp32 was required we 
would use the aarch64ipl32 override to resolve
the issue. Not so sure about aarch32 as  I haven't done much with it.

-- 

Jeremy A. Puhlman
jpuhlman at mvista.com