emerge -D --newuse system world

хороший вопрос ... вывод emerge -eav world

emerge -eav world

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

Calculating dependencies... done!

emerge: there are no ebuilds built with USE flags to satisfy ">=x11-libs/cairo-1.4.6[svg]".
!!! One of the following packages is required to complete your request:
- x11-libs/cairo-1.8.8 (Change USE: +svg)
(dependency required by "net-analyzer/rrdtool-1.3.8" [ebuild])
(dependency required by "net-mail/mailgraph-1.14" [ebuild])
(dependency required by "world" [argument])

ставлю флаги по порядку

картина получается может проще но все равно не получается ... вывод

USE="-* svg xml" emerge -eav world

!!! Your current profile is deprecated and not supported anymore.
!!! Please upgrade to the following profile if possible:
default/linux/x86/10.0

To upgrade do the following steps:
# Check 'eselect profile list'.
# Find the number that corresponds with the default/linux/x86/10.0 profile.
# Use 'eselect profile set ' to set a new /etc/make.profile symlink.
#
# Reference: http://www.gentoo.org/doc/en/gentoo-upgrading.xml
# See: "General instructions" in Section 3. "Profile updating instructions"

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

Calculating dependencies... done!

[ebuild N ] sys-devel/gcc-4.3.4 USE="(-altivec) -bootstrap -build -doc (-fixed-point) -fortran -gcj -gtk (-hardened) (-libffi) -mudflap (-multilib) -multislot (-n32) (-n64) -nls -nocxx -nopie -nptl -objc -objc++ -objc-gc -openmp -test -vanilla"
[ebuild N ] sys-libs/glibc-2.10.1-r1 USE="-debug -gd -glibc-omitfp (-hardened) (-multilib) -nls -profile (-selinux) -vanilla"
[ebuild N ] sys-apps/portage-2.1.6.13 USE="-build -doc -epydoc (-selinux)" LINGUAS="-pl"
[ebuild N ] app-admin/eselect-1.2.8 USE="-bash-completion -doc"
[ebuild N ] sys-apps/file-5.03 USE="-python"
[ebuild N ] dev-lang/python-2.6.4 USE="(wide-unicode) xml -berkdb -build -doc -examples -gdbm -ipv6 -ncurses -readline -sqlite -ssl -threads -tk -wininst"
[ebuild N ] app-admin/eselect-python-20090824

* Error: circular dependencies:

('ebuild', '/', 'sys-apps/file-5.03', 'merge') depends on
('ebuild', '/', 'app-admin/eselect-python-20090824', 'merge') (hard)
('ebuild', '/', 'dev-lang/python-2.6.4', 'merge') depends on
('ebuild', '/', 'app-admin/eselect-python-20090824', 'merge') (hard)
('ebuild', '/', 'sys-devel/gcc-4.3.4', 'merge') depends on
('ebuild', '/', 'sys-libs/glibc-2.10.1-r1', 'merge') (hard)
('ebuild', '/', 'app-admin/eselect-python-20090824', 'merge') depends on
('ebuild', '/', 'app-admin/eselect-1.2.8', 'merge') (hard)
('ebuild', '/', 'app-admin/eselect-1.2.8', 'merge') depends on
('ebuild', '/', 'sys-apps/file-5.03', 'merge') (medium)
('ebuild', '/', 'sys-libs/glibc-2.10.1-r1', 'merge') depends on
('ebuild', '/', 'sys-devel/gcc-4.3.4', 'merge') (hard)
('ebuild', '/', 'sys-apps/portage-2.1.6.13', 'merge') (hard)
('ebuild', '/', 'sys-apps/portage-2.1.6.13', 'merge') depends on
('ebuild', '/', 'dev-lang/python-2.6.4', 'merge') (hard)
('ebuild', '/', 'app-admin/eselect-1.2.8', 'merge') (medium)
('ebuild', '/', 'app-admin/eselect-python-20090824', 'merge') (hard)

* Note that circular dependencies can often be avoided by temporarily
* disabling USE flags that trigger optional dependencies.