[U-Boot] Default environment file

[Tom Rini]

On Wed, Jun 12, 2019 at 10:43:26AM +0200, Stefano Babic wrote:
> Hi Pascal,
> 
> On 12/06/19 10:20, Linder Pascal wrote:
> > Hi everyone,
> > 
> > 
> > I am currently moving the configurations of the KM boards from header files to Kconfig. But for the customly defined environment variables I did not found a decent solution until I have come across the default environment file, which seems very interesting to me.
> > 
> > 
> > To this day, nevertheless, it appears that noone made use of the CONFIG_USE_DEFAULT_ENV_FILE configuration defined in env/Kconfig. Does anyone still have an example for this kind of environment definition or knows how to create it?
> > 
> > 
> > In my opinion, this could be highly relevant for the transition away from the header files in include/configs.
> > 
> 
> Fully agree. Rather, I do not think there is a relevant example. But the
> environment is something like data and should not be part of the header
> file as it is for histoical reason. I added some times ago a way to
> extract the environment from the header and make the transition easy
> (see make u-boot-initial-env). And if the environment is split from the
> header as CONFIG_USE_DEFAULT_ENV_FILE allows, it is also easier to set
> an own environment via OE BSP layer without pushing for each small
> change to U-Boot. Not only, environments often conflict, and what is
> good for a project becomes evil for another one.

With the high-level goal of being able to eliminate the include/configs
file, we need to figure out a better solution to dealing with the
default environment.  Shuffling things into include/environment/ has
been the first step I've tried but I'm absolutely not tied down to this
and if people are motivated to push in a new solution to this overall
problem I'm happy to see it happen.  This sounds like a good overall
idea.

-- 
Tom
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