[Buildroot] [PATCH] pkg-infra: allow dumping reverse dependencies of a package

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

Thomas, All,

On 2016-10-23 15:23 +0200, Thomas Petazzoni spake thusly:
> On Sun, 25 Sep 2016 14:56:11 +0200, Yann E. MORIN wrote:
> > Finding the packages that select another one in a specific configuration
> > is not very trivial:
> > 
> >   - when optional, the dependency is not expressed in Kconfig
> > 
> >   - looking at the .mk files is not very nice.
> > 
> > Introduce a way to dump reverse dependencies of packages, i.e. the list
> > of packages that directly depend on that package. Like for direct
> > dependencies, we limit the list to the first-order reverse dependencies.
> > 
> > Document it in the main help; use the opportunity to also docuemnt
> > foo-show-depends.
> > 
> > Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
> 
> I was about to apply this patch, but after testing it, I'm a little bit
> skeptical.
[--SNIP--]
> So in the end, I find the semantic of this "show-rdepends" a bit weird.
> It shows reverse dependencies, some according to the current
> configuration, some not.

Right, good catch.

I've fixed it here now to take this into account. It should now match
the behaviour of -show-depends.

I'll spin it soon.

Thanks! :-)

Regards,
Yann E. MORIN.

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