Hi list,

When I do a world upgrade, I have encountered the following 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
(dev-python/wxpython-2.8.12.1-r1::gentoo, installed)
    >=media-libs/libpng-1.4:0/0= required by
(net-libs/webkit-gtk-1.8.3-r201::gentoo, installed)
    media-libs/libpng:0/0= required by (app-text/poppler-0.22.5::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-4.11.4::gentoo,
installed)

  (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)


My question is, seems upgrade to libpng-1.6.8 will solve the conflict, why
emerge cannot proceed this automatically? or there are some switches to
controller this?

Thanks a lot.