">=dev-db/sqlite-3.7.14[threadsafe]" have been masked

[loongsking]

[code] * IMPORTANT: 8 news items need reading for repository 'gentoo'.
* Use eselect news to read news items.


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

Calculating dependencies... done!

!! All ebuilds that could satisfy[code] ">=dev-db/sqlite-3.7.14[threadsafe]" have been masked[/code].
!!! One of the following masked packages is required to complete your request:
- dev-db/sqlite-3.7.14.1::gentoo (masked by: EAPI 5)

The current version of portage supports EAPI '4'. You must upgrade to a
newer version of portage before EAPI masked packages can be installed.
(dependency required by "app-misc/tracker-0.14.3" [ebuild])
(dependency required by "gnome-base/gnome-extra-apps-3.4.1[tracker]" [ebuild])
(dependency required by "gnome-base/gnome-3.4.1[extras]" [ebuild])
(dependency required by "gnome" [argument])
For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.

[Hu]

You should read your news.

What is the output of emerge --pretend --verbose sys-apps/portage ; emerge --info --verbose dev-db/sqlite gnome?