[Buildroot] Linux and busybox-configfiles

Shawn J. Goff shawn.goff at accelecon.com
Tue Jan 29 00:16:17 UTC 2013

On 01/27/2013 05:36 PM, Arnout Vandecappelle wrote:
> On 27/01/13 17:08, Stephan Hoffmann wrote:
>> Hello all,
>> buildroot provides direct calls to the configuration menus for busybox
>> and linux:
>> make linux-menuconfig
>> make busybox-menuconfig
>> Additionally, there is a linux-savedefconfig make target.
>> All these save their output in the build directory, so that all changes
>> get lost when "make clean" is called. Thus I don't think that I am the
>> only one who has been surprised to notice that "make busybox-menuconfig
>> && make clean && make" does not have any effect on busybox's
>> configuration.
>   This is a bit a philosophical discussion: should the configuration
> files of linux, busybox, etc. be considered part of the buildroot
> configuration or not? In the former case, they should survive a 'make
> clean', in the latter case they should be removed by 'make clean'.
>   I tend to agree that the package configs should be considered part of
> the buildroot config. However, if your buildroot config specifies some
> BR2_PACKAGE_BUSYBOX_CONFIG, then I would expect that after 'make clean',
> that is the config that will be used. More generically, I expect I can do:
>   make foo_defconfig
>   Do all kinds of weird stuff that completely messes things up
>   make clean
>   make
> and to be back in the same state as 'make foo_defconfig; make'.

I'd like the busybox-*config and linux-*config targets should save the 
resulting config in BR2_PACKAGE_BUSYBOX_CONFIG and 
BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE. I keep these two locations under 
source control in board/my_company/board_name/, so when I completely 
mess up the config, it's just a git checkout path/to/config, and if I 
want to keep the changes, I just add and commit the file. It also lets 
me clearly see something has changed when I run git status.

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