[PATCH 1/1] kconfig: add CPU endian selection beconfig and leconfig
Florian Fainelli
f.fainelli at gmail.com
Mon Nov 30 11:26:36 PST 2015
On 27/11/15 15:49, Scott Branden wrote:
> Hi Florian,
>
> On 15-11-27 10:39 AM, Florian Fainelli wrote:
>> Le 26/11/2015 11:59, Scott Branden a écrit :
>>> Add support for switching defconfig between big and little endian CPU.
>>> Various CPU types have ability to select big and little endian
>>> CPU in the kernel configuration.
>>>
>>> "make beconfig" will set CONFIG_CPU_BIG_ENDIAN
>>> "make leconfig" will unset CONFIG_CPU_BIG_ENDIAN
>>
>> I believe I understand what you are trying to achieve here, which is to
>> have an identical defconfig file that you can share between a big-endian
>> and little-endian kernel?
> You understand correct - ARM64 maintainers have only allowed 1 defconfig
> upstream and it supports little endian. And it doesn't make sense to
> have another defconfig with a single line difference upstreamed. Yet
> the defconfig does not allow the system to boot in big endian mode.
>>
>> Is not this something better left to a build system which understands
>> what config fragments are in general?
> Every build system would need to invent their own procedure. By adding
> this into the upstream kernel there is no need to.
> make defconfig
> make beconfig (or make leconfig)
> make
In my experience build systems like OpenWrt, Yocto/OE know about config
fragments, but have a harder time dealing with running multiple make
targets within the Linux source tree...
>>
>> Since we seem to have support for fragments now with kvm and friends,
>> having this does not seem to be a big stretch though.
> Yes, that is why I proposed place it in a common location.
Fair enough.
--
Florian
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