[Buildroot] [PATCH 3/3] New <pkg>-update-last-config-fragment target in pkg-kconfig.mk

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas, All,

On 2018-08-15 19:35 +0200, Thomas Petazzoni spake thusly:
> On Wed, 15 Aug 2018 18:16:57 +0200, Yann E. MORIN wrote:
> > Indeed, it is not to be considered to be a diff of any of the fragment,
> > but of the configuration *as a whole*.
> > 
> > That's why I initially did not write a full diff, but only the delta
> > snippet, not the context, because it is a diff, not a patch.
> > 
> > But I think we should instead use the scripts/diffconfig script that is
> > in the linux kernel tree, and which outputs looks like:
> > 
> >     $ cat config.000
> >     CONFIG_FOO=y
> >     $ cat config.001
> >     CONFIG_FOO is not set
> >     $ ./scripts/diffconfig config.000 config.001
> >      FOO y -> n
> > 
> > which IMNSHO is exactly the message we want to convey.
> 
> Indeed, this looks very good, and diffconfig is an existing tool.

Note that this was the diffconfig tool frm the kernel. The one we have
behave differently (and badly I think), given the same config files as
input:

    $ ./utils/diffconfig linux-config.000 linux-config.001
    +IG_FOO n

Which is not nice... :-/

Regards,
Yann E. MORIN.

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