Hi, Gentoo. I've just tried an emerge -puND world, after a shockingly long interval. I got the error message:
!!! Multiple package instances within a single package slot have been pulled !!! into the dependency graph, resulting in a slot conflict: , etc. To simplify the problem, I tried to emerge an individual package identified in that message, and tried emerge -p libpng. I got the same message, with this: ############################################################################### !!! Multiple package instances within a single package slot have been pulled !!! into the dependency graph, resulting in a slot conflict: media-libs/libpng:0 (media-libs/libpng-1.5.17-r1::gentoo, installed) pulled in by media-libs/libpng:0/0= required by (x11-libs/cairo-1.12.14-r4::gentoo, installed) >=media-libs/libpng-1.4:0/0= required by (app-editors/emacs-24.3-r2::gentoo, installed) media-libs/libpng:0/0= required by (media-libs/libwebp-0.3.1::gentoo, installed) media-libs/libpng:0/0= required by (net-print/cups-filters-1.0.36-r1::gentoo, installed) media-libs/libpng:0/0= required by (kde-base/kdelibs-4.11.2-r1::gentoo, installed) media-libs/libpng:0/0= required by (dev-qt/qtgui-4.8.5-r1::gentoo, installed) media-libs/libpng:0/0= required by (app-text/poppler-0.24.3::gentoo, installed) (and 3 more with the same problems) (media-libs/libpng-1.6.8::gentoo, ebuild scheduled for merge) pulled in by (no parents that aren't satisfied by other packages in this slot) ############################################################################### Clearly, I'm trying to update libpng-1.5.17 to libpng-1.6.8. What does this portion of the message mean: media-libs/libpng:0/0= ^^^^^ ? Is it somehow telling me that cairo and friends require the currently installed version, whatever that is? Where is this format documented? I couldn't find anything about it in the Gentoo handbook, and not in the emerge man page either. What do I have to do to get this thing emerged? Thanks! -- Alan Mackenzie (Nuremberg, Germany).