[U-Boot] [PATCHv2] scripts: Add script to extract default environment

[Lukasz Majewski <l.majewski@majess.pl>]

Hi Simon,

> Hi,
> 
> On 27 September 2016 at 07:37, Lukasz Majewski <l.majewski@majess.pl>
> wrote:
> > Hi Simon,
> >
> >> Hi Lukasz,
> >>
> >> On 16 September 2016 at 22:57, Lukasz Majewski
> >> <l.majewski@majess.pl> wrote:
> >> > This script looks for env_common.o object file and extracts from
> >> > it default u-boot environment, which is afterwards printed on
> >> > standard output.
> >> >
> >> > Usage example:
> >> > get_default_envs.sh > u-boot-env-default.txt
> >> >
> >> > The generated text file can be used as input for mkenvimage.
> >> >
> >> > Signed-off-by: Lukasz Majewski <l.majewski@majess.pl>
> >> >
> >> > ---
> >> > Changes for v2:
> >> > - Sort uniquely entries
> >> > - Exclude env_common.o generated for SPL
> >> > ---
> >> >  scripts/get_default_envs.sh | 34
> >> > ++++++++++++++++++++++++++++++++++ 1 file changed, 34
> >> > insertions(+) create mode 100755 scripts/get_default_envs.sh
> >>
> >> Reviewed-by: Simon Glass <sjg@chromium.org>
> >>
> >> But why is this needed?
> >
> > Some boards for production u-boot have all the envs hardcoded in
> > their ./include/configs/<board>.h file.
> >
> > Also, they support envs stored on persistent memory - like eMMC.
> >
> > During flashing both u-boot and envs are stored on the target
> > memory. Such script allows having the same data in both places.
> >
> > I do know that I could also use external file, which I could
> > include to u-boot during compilation and compile the boot.scr file
> > with mkimage.
> >
> > Or maybe there is any other way?
> 
> Seems OK to me, I was just curious.

I was afraid that similar functionality was already provided for e.g.
sandbox :-).

Thanks for review.

Best regards,
?ukasz Majewski

> 
> >
> > Best regards,
> > ?ukasz Majewski
> 
> [...]

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