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Mick, |
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You do realize that blind bottom posting is far WORSE than blind |
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top-posting (done here intentionally to make a point), don't you? |
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|
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Please trim your posts. |
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On 2014-02-22 6:32 PM, Mick <michaelkintzios@×××××.com> wrote: |
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> On Saturday 22 Feb 2014 22:06:15 Alan McKinnon wrote: |
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>> On 22/02/2014 23:15, Alan Mackenzie wrote: |
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>>> Hi, Gentoo. |
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>>> |
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>>> I've just tried an emerge -puND world, after a shockingly long interval. |
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>>> |
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>>> I got the error message: |
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>>> !!! Multiple package instances within a single package slot have been |
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>>> pulled |
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>>> |
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>>> !!! into the dependency graph, resulting in a slot conflict: |
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>>> , etc. |
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>>> |
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>>> To simplify the problem, I tried to emerge an individual package |
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>>> identified in that message, and tried emerge -p libpng. I got the same |
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>>> message, with this: |
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>>> |
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>>> ######################################################################### |
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>>> ###### !!! Multiple package instances within a single package slot have |
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>>> been pulled !!! into the dependency graph, resulting in a slot conflict: |
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>>> |
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>>> media-libs/libpng:0 |
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>>> |
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>>> (media-libs/libpng-1.5.17-r1::gentoo, installed) pulled in by |
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>>> |
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>>> media-libs/libpng:0/0= required by |
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>>> (x11-libs/cairo-1.12.14-r4::gentoo, installed) |
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>>> |
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>>> >=media-libs/libpng-1.4:0/0= required by |
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>>> >(app-editors/emacs-24.3-r2::gentoo, installed) |
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>>> |
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>>> media-libs/libpng:0/0= required by (media-libs/libwebp-0.3.1::gentoo, |
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>>> installed) media-libs/libpng:0/0= required by |
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>>> (net-print/cups-filters-1.0.36-r1::gentoo, installed) |
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>>> media-libs/libpng:0/0= required by |
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>>> (kde-base/kdelibs-4.11.2-r1::gentoo, installed) |
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>>> media-libs/libpng:0/0= required by (dev-qt/qtgui-4.8.5-r1::gentoo, |
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>>> installed) media-libs/libpng:0/0= required by |
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>>> (app-text/poppler-0.24.3::gentoo, installed) (and 3 more with the |
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>>> same problems) |
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>>> |
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>>> (media-libs/libpng-1.6.8::gentoo, ebuild scheduled for merge) pulled in |
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>>> by |
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>>> |
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>>> (no parents that aren't satisfied by other packages in this slot) |
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>>> |
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>>> ######################################################################### |
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>>> ###### Clearly, I'm trying to update libpng-1.5.17 to libpng-1.6.8. What |
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>>> does |
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>>> |
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>>> this portion of the message mean: |
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>>> media-libs/libpng:0/0= |
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>>> |
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>>> ^^^^^ |
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>>> |
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>>> ? Is it somehow telling me that cairo and friends require the currently |
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>>> installed version, whatever that is? Where is this format documented? I |
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>>> couldn't find anything about it in the Gentoo handbook, and not in the |
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>>> emerge man page either. |
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>>> |
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>>> What do I have to do to get this thing emerged? |
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>>> |
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>>> Thanks! |
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>> |
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>> You've hit the dreaded sub-slot (a new portage feature). It causes no |
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>> end of trouble as so few people know how it really works, but it's |
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>> intended to replace @preserved-rebuild by DoingItRite and finally make |
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>> revdep-rebuild obsolete. |
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>> |
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>> It's documented in man 5 ebuild under these headings: |
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>> |
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>> Atom Slots |
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>> Sub Slots |
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>> Atom Slot Operators |
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>> SLOT |
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>> |
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>> libpng:0/0 is libpng SLOT 0 which has been around since EAPI1 and |
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>> SUBSLOT 0 which is new. |
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>> |
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>> Take cairo which is one of your deps. In the ebuild: |
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>> |
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>> RDEPEND=" |
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>> media-libs/libpng:0= |
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>> " |
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>> |
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>> eix libpng shows: |
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>> |
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>> (0) 1.5.15 1.5.17-r1 (~)1.6.6(0/16) (~)1.6.7(0/16) 1.6.8(0/16) |
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>> (~)1.6.9(0/16) |
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>> |
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>> That shows libpng-1.5.* have slot/subslot 0/0 and |
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>> libpng-1.6.* have slot/subslot 0/16 |
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>> where presumably "16" is shorthand for "1.6" in the version |
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>> |
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>> |
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>> |
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>> Now read those headings in the man page, you will find this gem: |
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>> |
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>> "= Indicates that any slot value is acceptable. In addition, for |
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>> runtime dependencies, indicates that the package will break unless a |
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>> matching package with slot and sub-slot equal to the slot and |
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>> sub-slot of the best installed version at the time the package was |
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>> installed is available. |
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>> |
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>> Examples: |
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>> dev-libs/icu:= |
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>> dev-lang/perl:= |
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>> dev-libs/glib:= |
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>> " |
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>> |
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>> in other words, even though libpng-1.5.17-r1 and libpng-1.6.8 are in the |
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>> same SLOT, nevertheless cairo will break if you upgrade libpng that way. |
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>> |
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>> Or expressed another way in language from before sub-slots, cairo will |
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>> stop working properly after the emerge world until you run |
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>> revdep-rebuild and fix and the borkage |
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>> |
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>> |
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>> The world update wants to upgrade libpng as a new stable version is |
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>> available but portage won't do it as it will break packages that use |
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>> libpng. |
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>> |
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>> |
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>> All my hosts here are up to date so I can't reproduce your problem: |
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>> |
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>> - is portage up to date runnign latest version in your tree? Update that |
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>> first (always a good idea anyway) |
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>> - are you sure that's an emerge failure and not just a convoluted info |
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>> message? Perhaps post the entire emerge output. |
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> |
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> I can't recall how I got out of this, but by instinct I would probably unmerge |
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> libpng, emerge world and then @preserved-rebuild and revdep-rebuild. |
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> |
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