I like a DEPEND way. But in this way many packages will need to be modified and 
missing dependencies likely appear. I developed an util to detect missing 
dependencies
https://bugs.gentoo.org/show_bug.cgi?id=autodep

Best,
Alexander Bersenev

On 16.09.2011, at 10:49, Zac Medico <zmed...@gentoo.org> wrote:

> On 09/15/2011 09:42 PM, Matt Turner wrote:
>> On Fri, Sep 16, 2011 at 12:32 AM, Matt Turner <matts...@gentoo.org> wrote:
>>> Often packages depending on X11 libraries will also have to specify
>>> the X11 libraries' proto packages in DEPEND. This is because the X11
>>> library itself #includes files provided by the proto package. It's not
>>> really that the X11 library depends on this at run-time, so the
>>> protocol packages aren't specified in the RDEPEND of the libraries.
>>> 
>>> This is documented in a number of bug reports (see 379545), and it
>>> seems that the decision is between
>>> - add proto package to dependency list of packages using X11 libs
>>> - add proto package to rdepend list of the relevant library itself
>>> 
>>> The first is more correct, I think, but it's also much more annoying.
>>> Mesa winds up having x11-proto/inputproto in DEPEND for some long
>>> forgotten reason, for instance.
>>> 
>>> The second option is much simpler and less error prone, but removes
>>> the ability to depclean the proto packages.
>>> 
>>> It seems that some sort of DEPEND variable that means "I only need
>>> this when other packages are building against me" would be useful.
>>> Thoughts?
>>> 
>>> Matt
>> 
>> Another similar situation:
>> 
>> https://bugs.gentoo.org/show_bug.cgi?id=342393
> 
> Maybe the virtual/mesa-build approach that I suggested can be adapted to
> other similar situations:
> 
>  https://bugs.gentoo.org/show_bug.cgi?id=342393#c23
> 
> -- 
> Thanks,
> Zac
> 

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