[Buildroot] [PATCH] linux: allow the selection of the architecture's default configuration

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Hello,

On Tue, 14 Jun 2016 12:19:58 +0200, Thomas Petazzoni wrote:
> To configure the Linux kernel, we currently provide two options:
> 
>  1. Passing a defconfig name (for example "multi_v7"), to which we append
>     "_defconfig" to run "make multi_v7_defconfig".
> 
>  2. Passing a path to a custom configuration file.
> 
> Unfortunately, those two possibilities do not allow to configure the
> kernel when you want to use the default configuration built into the
> kernel for a given architecture. For example, on ARM64, there is a
> single defconfig simply called "defconfig", which you can load by
> running "make defconfig".
> 
> Using the mechanism (1) above doesn't work because we append
> "_defconfig" automatically.
> 
> One solution would be to change (1) and require the user to enter the
> full defconfig named (i.e "multi_v7_defconfig" instead of "multi_v7"),
> but we would break all existing Buildroot configurations.
> 
> So instead, we add a third option, which simply tells Buildroot to use
> the default configuration for the selected architecture. In this case,
> Buildroot will configure the kernel by running "make defconfig".
> 
> Cc: Naresh Kamboju <naresh.kamboju@linaro.org>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> ---
> This proposal aims at replacing:

Applied to master. Thanks Yann for the review!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com