* How to modify defconfig file - make savedefconfig?
@ 2022-01-27 16:46 Grant Edwards
2022-01-28 10:26 ` Alexander Dahl
0 siblings, 1 reply; 2+ messages in thread
From: Grant Edwards @ 2022-01-27 16:46 UTC (permalink / raw)
To: u-boot
What is the "right" way to modify a defconfig file?
Most sources I've found just say things like "edit the defconfig
file". That seems error-prone -- especially when dealing with settings
that have side effects.
I did stumble across one mention of "make savedefconfig", and this
seems to be the right way to modify a defconfig file:
make myboard_defconfig
make menuconfig
make savedefconfig
cp defconfig configs/myboard_defconfig
Do people manually edit their defconfig file when they want to make a
change, or do they use "make savedefconfig" like I show above?
One reason I'm asking is that the original defconfig file provided by
the silicon vendor (Renesas) appears to be a manually stripped-down
..config file, because when I do
make vendors_defconfig
make savedefconfig
The defconfig file generated by 'make savedefconfig' looks _nothing_
like the starting vendors_defconfig. The new defconfig generates the
same .config file as the vendors_defconfig file. But the
vendors_defconfig file is arranged completely differently with
different/extra comments, extra blank lines, etc.
--
Grant
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: How to modify defconfig file - make savedefconfig?
2022-01-27 16:46 How to modify defconfig file - make savedefconfig? Grant Edwards
@ 2022-01-28 10:26 ` Alexander Dahl
0 siblings, 0 replies; 2+ messages in thread
From: Alexander Dahl @ 2022-01-28 10:26 UTC (permalink / raw)
To: Grant Edwards; +Cc: u-boot
Hello Grant,
Am Thu, Jan 27, 2022 at 04:46:48PM -0000 schrieb Grant Edwards:
> What is the "right" way to modify a defconfig file?
>
> Most sources I've found just say things like "edit the defconfig
> file". That seems error-prone -- especially when dealing with settings
> that have side effects.
>
> I did stumble across one mention of "make savedefconfig", and this
> seems to be the right way to modify a defconfig file:
>
> make myboard_defconfig
> make menuconfig
> make savedefconfig
> cp defconfig configs/myboard_defconfig
That's what I do.
> Do people manually edit their defconfig file when they want to make a
> change, or do they use "make savedefconfig" like I show above?
You can do both. If you already have a defconfig, this:
1) edit your myboard_defconfig
2) make myboard_defconfig
3) make savedefconfig
4) cp defconfig configs/myboard_defconfig
You might want to `git add configs/myboard_defconfig` in between those
stages if you want to inspect what changed with those calls.
> One reason I'm asking is that the original defconfig file provided by
> the silicon vendor (Renesas) appears to be a manually stripped-down
> ..config file, because when I do
>
> make vendors_defconfig
> make savedefconfig
>
> The defconfig file generated by 'make savedefconfig' looks _nothing_
> like the starting vendors_defconfig. The new defconfig generates the
> same .config file as the vendors_defconfig file. But the
> vendors_defconfig file is arranged completely differently with
> different/extra comments, extra blank lines, etc.
I think U-Boot expects those files to be created by savedefconfig,
see all the changesets in Git reading
'configs: Resync with savedefconfig'.
Greets
Alex
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-01-27 16:46 How to modify defconfig file - make savedefconfig? Grant Edwards
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