[ping] allow target (OS) SUBTARGET_OVERRIDE_OPTIONS on aarch64

Olivier Hainque hainque@adacore.com
Wed Dec 12 17:13:00 GMT 2018

> On 12 Dec 2018, at 17:57, James Greenhalgh <james.greenhalgh@arm.com> wrote:

>> This one proposes the possibility for target (OS) configurations
>> to provide a SUBTARGET_OVERRIDE_OPTIONS macro as other CPU ports
>> do, needed by our aarch64-vxworks7 port to come.
> OK.

Great :-) Thanks for your review James !

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