Re: [PATCH v1 1/5] meson: Introduce target-specific Kconfig

[Philippe Mathieu-Daudé]

On 7/6/21 3:10 PM, Thomas Huth wrote:
> On 06/07/2021 14.47, Philippe Mathieu-Daudé wrote:
>> On 7/6/21 12:52 PM, Thomas Huth wrote:
>>> On 21/06/2021 17.21, Alex Bennée wrote:
>>>> From: Philippe Mathieu-Daudé <f4bug@amsat.org>
>>>>
>>>> Add a target-specific Kconfig. We need the definitions in Kconfig so
>>>> the minikconf tool can verify they exit. However CONFIG_FOO is only
>>>
>>> s/exit/exist/ ?
>>>
>>>> enabled for target foo via the meson.build rules.
>>>>
>>>> Two architecture have a particularity, ARM and MIPS:
>>>> their 64-bit version include the 32-bit subset.
>>>
>>> Why do you mention these here, but not x86, Sparc, PPC and RISC-V which
>>> also have 32-bit and 64-bit variants?
>>
>> Because we consider them as different targets, they don't include
>> (kselect) the subset.
> 
> And why is that done this way? There is certainly a big difference
> between Sparc and Sparc64, but for x86 and PPC, the 64-bit variant is a
> superset of the 32-bit variant, so why is it done different here
> compared to ARM and MIPS?

I don't know these targets well. Maybe the 64-bit variants do include
their 32-bit subset. If you know, I can easily send a new patch.