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Re: understanding relations between binary packages

Am 27.03.2013 um 17:42 schrieb Greg Troxel:
>> 2) for every library that appears in REQUIRES, a package that PROVIDEs this
>>   library is installed.
>> 3) None of it CONFLICTS is installed 
> I think that now, item 1 implies item 2.  If there were a package pair
> that required the PROVIDES/REQUIRES to resolve dependencies, I would
> think that's a bug.  But perhaps I'm confused on this point.
> An important issue is that ABI compat is about more tha library
> versions; it's about anything invoked by use (script arguments and
> output).  So while PROVIDES/REQUIRES is really useful to figure out how
> to automatically cope with in-place upgrades that bump shlib major
> versions, I'm not sure it is a general/complete solution.

I couldn't fine any code that uses the PROVIDES/REQUIRES, other than put it 
into build into, and retrieve it for pkg_info -X == pkg_summary. Where is the 
code that uses this in resolving dependencies?

In my understanding points #1 and #3 apply, and #2 simply does not.
Corrections of this understanding are welcome.

  - Hubert

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