[gentoo-user] KDE3 removal

[James]

Hello,

I've been updating a kde3 workstation to kde4
off and on for a few days now. KDE4 is installed
and seem to work, no extensive testing yet.

However, when I run revdep-rebuild, it complains
about numerous kde3 based packages. Most, if not all
had the kde4 equivalent packages installed. So I just
manually deleted the list of kde3.5.x based packages.
<snip>

So a few more manual passes of removing the offending kde-3.5.x
packages and I'm down to this list of packages that
revdep-rebuild wants to rebuild:

I get the list from revdep-rebuild, research if I want the 
packages and then clean out the (crufted) revdep-rebuild 
list and continue until I'm down to these packages:


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

Calculating dependencies... done!
[ebuild  N    ] sys-fs/device-mapper-1.02.24-r1  USE="(-selinux)"
[ebuild     U ] media-libs/lcms-1.18-r1 [1.17]
[ebuild   R   ] sys-fs/cryptsetup-1.0.6-r2
[ebuild   R   ] net-libs/xulrunner-1.8.1.19
[ebuild     U ] net-libs/xulrunner-1.9.1.4 [1.9.0.7] USE="alsa%* python%*
-debug% -sqlite% -startup-notification*"
[ebuild   R   ] sys-apps/hal-0.5.12_rc1-r8


So far so good. I did not actually allow revdep-rebuild to
complete, as I want all vestiges of kde3 and other cruft gone.

Now I have a list I can focus on, except, I'm confused about
device-mapper, ,cryptsetup, and xulrunner as my research suggest 
device-mapper is not needed, but it is being call by:
[ Searching for packages depending on device-mapper... ]
sys-fs/cryptsetup-1.0.6-r2 (>=sys-fs/device-mapper-1.00.07-r1)


Research suggests that I can install lvm2 and be done with that? But it 
first wants to call back device-mapper?


Now, guidance here is appreciated.


James