With commit 1d0c129c8a, media-tv/xbmc-9999 can now be built with optional samba support.
should be all set now in the tree; thanks for the report! Commit message: Make samba support optional now that upstream allows it to be disabled http://sources.gentoo.org/media-tv/xbmc/xbmc-9999.ebuild?r1=1.88&r2=1.89
Please change ebuild. In section COMMON_DEPEND="${PYTHON_DEPS} change samba? ( >=net-fs/samba-3.4.6[smbclient] ) to samba? ( || ( >=net-fs/samba-3.4.6:0[smbclient] >=net-fs/samba-4.0.0:0[client] ) ) for samba4 support.
new issue -> new bug