gentoo64 ~ # emerge --pretend kdebase kdm

These are the packages that would be merged, in order:

Calculating dependencies... done!
[blocks B     ] >=kde-base/kdelibs-3.5.4-r2 (is blocking kde-base/kde-env-3-r4)
[blocks B     ] =kde-base/kdebase-3.5* (is blocking kde-base/khotkeys-3.5.1)
[blocks B     ] =kde-base/kdebase-3.5* (is blocking kde-base/libkonq-3.5.2)
[blocks B     ] =kde-base/kdebase-3.5* (is blocking kde-base/kdebase-data-3.5.2)
[blocks B     ] =kde-base/kdebase-3.5* (is blocking kde-base/kicker-3.5.2)
[blocks B     ] =kde-base/kdebase-3.5* (is blocking kde-base/kdesu-3.5.0)
[blocks B     ] =kde-base/kdebase-3.5* (is blocking kde-base/kcontrol-3.5.2)
[blocks B     ] =kde-base/kdebase-3.5* (is blocking kde-base/khelpcenter-3.5.2)
[blocks B     ] =kde-base/kdebase-3.5* (is blocking kde-base/kcminit-3.5.0)
[blocks B     ] =kde-base/kdebase-3.5* (is blocking kde-base/kdm-3.5.2-r1)
[blocks B     ] =kde-base/kdebase-3.5* (is blocking kde-base/kdepasswd-3.5.2)
[ebuild     U ] kde-base/arts-3.5.4-r1 [3.5.2-r1]
[ebuild   R   ] kde-base/kdebase-3.5.4-r1
[ebuild  N    ] kde-base/kde-env-3-r4
[ebuild     UD] kde-base/kdelibs-3.5.2-r6 [3.5.4-r2]
[ebuild  N    ] kde-base/khotkeys-3.5.1  USE="arts kdeenablefinal xinerama -debug -kdehiddenvisibility"
[ebuild  N    ] kde-base/libkonq-3.5.2  USE="arts kdeenablefinal xinerama -debug -kdehiddenvisibility"
[ebuild  N    ] kde-base/kdebase-data-3.5.2  USE="arts kdeenablefinal xinerama -debug -kdehiddenvisibility"
[ebuild  N    ] kde-base/kicker-3.5.2  USE="arts kdeenablefinal xinerama -debug -kdehiddenvisibility -xcomposite  "
[ebuild  N    ] kde-base/kdesu-3.5.0  USE="arts kdeenablefinal xinerama -debug -kdehiddenvisibility (-kdexdeltas  )"
[ebuild  N    ] kde-base/khelpcenter-3.5.2  USE="arts kdeenablefinal xinerama -debug -kdehiddenvisibility"
[ebuild  N    ] kde-base/kcminit-3.5.0  USE="arts kdeenablefinal xinerama -debug -kdehiddenvisibility (-kdexdelt  as)"
[ebuild  N    ] kde-base/kcontrol-3.5.2  USE="arts kdeenablefinal opengl ssl xinerama -debug -ieee1394 -kdehidde  nvisibility -logitech-mouse"
[ebuild  N    ] kde-base/kdepasswd-3.5.2  USE="arts kdeenablefinal xinerama -debug -kdehiddenvisibility"
[ebuild  N    ] kde-base/kdm-3.5.2-r1  USE="arts kdeenablefinal pam xinerama -debug -kdehiddenvisibility"