gentoo ~ # emerge -vpuD --newuse world

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

Calculating world dependencies... done!
[ebuild     U ] sys-apps/busybox-1.6.1 [1.2.2.1] USE="-debug -make-symlinks -savedconfig (-selinux) -static (-netboot%)" 0 kB
[ebuild     U ] app-arch/cpio-2.9 [2.6-r5] USE="nls" 0 kB
[ebuild     U ] sys-devel/gettext-0.16.1-r1 [0.16.1] USE="nls -doc -emacs -nocxx" 0 kB
[ebuild     U ] sys-libs/ncurses-5.6-r1 [5.5-r3] USE="gpm unicode -bootstrap -build -debug -doc -minimal -nocxx -trace" 0 kB
[ebuild     U ] sys-kernel/linux-headers-2.6.21 [2.6.17-r2] USE="(-gcc64%)" 0 kB
[ebuild  N    ] dev-libs/libpcre-6.6  USE="-doc" 0 kB
[ebuild     U ] dev-libs/mpfr-2.2.1_p5 [2.2.0_p16] 0 kB
[ebuild     U ] app-shells/bash-3.2_p17 [3.1_p17] USE="nls -afs -bashlogger -vanilla" 0 kB
[ebuild     U ] sys-devel/m4-1.4.9-r1 [1.4.7] USE="nls -examples%" 0 kB
[ebuild   R   ] sys-apps/sed-4.1.5  USE="nls -static" USERLAND="(GNU%*)" 0 kB
[ebuild     U ] sys-apps/findutils-4.3.8 [4.3.2-r1] USE="nls (-selinux) -static" 0 kB
[ebuild     U ] app-editors/nano-2.0.6 [2.0.2] USE="ncurses nls unicode -debug -justify -minimal -slang -spell" 0 kB
[ebuild     U ] sys-apps/grep-2.5.1a-r1 [2.5.1-r8] USE="nls pcre%* -static (-build%)" 0 kB
[ebuild     U ] app-arch/gzip-1.3.12 [1.3.5-r10] USE="nls -pic -static (-build%)" 0 kB
[ebuild     U ] sys-apps/net-tools-1.60-r13 [1.60-r12] USE="nls -static" 0 kB
[ebuild     U ] sys-process/procps-3.2.7 [3.2.6] USE="(-n32)" 0 kB
[ebuild     U ] sys-devel/flex-2.5.33-r2 [2.5.33-r1] USE="nls -static" 0 kB
[ebuild     U ] sys-apps/gawk-3.1.5-r3 [3.1.5-r2] USE="nls" 0 kB
[ebuild     U ] app-arch/tar-1.18-r2 [1.16-r2] USE="nls -static" 0 kB
[ebuild     U ] sys-apps/less-406 [394] USE="unicode" 0 kB
[ebuild     U ] sys-fs/e2fsprogs-1.39-r2 [1.39] USE="nls -static" 0 kB
[ebuild     U ] sys-libs/readline-5.2_p4 [5.1_p4] 0 kB
[ebuild     U ] sys-devel/binutils-config-1.9-r4 [1.9-r3] 0 kB
[ebuild     U ] net-misc/rsync-2.6.9-r3 [2.6.9-r1] USE="acl ipv6 -static -xinetd" 0 kB
[ebuild     U ] sys-devel/bison-2.3 [2.2] USE="nls -static" 0 kB
[ebuild     U ] sys-devel/binutils-2.17-r1 [2.16.1-r3] USE="nls -multislot -multitarget -test -vanilla" 0 kB
[ebuild     U ] sys-apps/man-1.6e-r3 [1.6d] USE="nls" 0 kB
[ebuild  NS   ] sys-libs/db-4.5.20_p2  USE="-bootstrap -doc -java -nocxx -tcl -test" 0 kB
[ebuild     U ] sys-apps/man-pages-2.63 [2.42] USE="nls" 0 kB
[ebuild     U ] sys-apps/diffutils-2.8.7-r2 [2.8.7-r1] USE="nls -static" 0 kB
[ebuild     U ] sys-devel/autoconf-2.61-r1 [2.61] USE="-emacs" 0 kB
[ebuild  N    ] dev-perl/Locale-gettext-1.05  0 kB
[ebuild     U ] sys-apps/util-linux-2.12r-r7 [2.12r-r5] USE="crypt nls perl -old-crypt (-selinux) -static" 0 kB
[ebuild  N    ] sys-apps/help2man-1.36.4  USE="nls" 0 kB
[ebuild     U ] sys-devel/libtool-1.5.24 [1.5.22] USE="-vanilla%" 0 kB
[ebuild     U ] sys-apps/coreutils-6.9-r1 [6.4] USE="acl nls (-selinux) -static -xattr%" 0 kB
[ebuild     U ] sys-process/psmisc-22.5-r1 [22.2] USE="ipv6 nls -X (-selinux)" 0 kB
[ebuild     U ] sys-apps/debianutils-2.22.1 [2.17.4] USE="-static" 0 kB
[ebuild     U ] dev-lang/python-2.4.4-r4 [2.4.3-r4] USE="berkdb gdbm ipv6 ncurses readline ssl -bootstrap -build -doc -examples% -nocxx -nothreads% -tk -ucs2" 0 kB
[ebuild     U ] sys-apps/file-4.21-r1 [4.20-r1] USE="python" 0 kB
[ebuild     U ] sys-apps/shadow-4.0.18.1-r1 [4.0.18.1] USE="cracklib nls pam -nousuid (-selinux) -skey" 0 kB
[ebuild     U ] dev-libs/openssl-0.9.8e-r2 [0.9.8d] USE="zlib -bindist -emacs -sse2 -test" 0 kB
[ebuild     U ] app-misc/ca-certificates-20070303-r1 [20061027.2] 0 kB
[ebuild     U ] net-misc/openssh-4.7_p1-r1 [4.5_p1-r1] USE="pam tcpd -X -X509 -chroot -hpn -kerberos -ldap -libedit (-selinux) -skey -smartcard -static" 0 kB
[ebuild     U ] sys-apps/module-init-tools-3.2.2-r3 [3.2.2-r2] USE="-old-linux% (-no-old-linux%)" 0 kB
[ebuild     U ] sys-apps/baselayout-1.12.9-r2 [1.12.9] USE="unicode -bootstrap -build -static (-ldap%)" 0 kB
[ebuild     U ] sys-fs/udev-114 [104-r12] USE="(-selinux)" 0 kB
[ebuild     U ] sys-libs/glibc-2.5-r4 [2.5] USE="nls nptl nptlonly -build -debug% -glibc-compat20 -glibc-omitfp (-hardened) (-multilib) -profile (-selinux)" 0 kB
[ebuild     U ] sys-devel/gcc-4.1.2 [4.1.1-r3] USE="fortran mudflap* nls (-altivec) -bootstrap -build -d% -doc -gcj -gtk (-hardened) -ip28 -ip32r10k (-multilib) -multislot (-n32) (-n64) -nocxx -objc -objc++ -objc-gc -test -vanilla" 0 kB

Total: 49 packages (44 upgrades, 3 new, 1 in new slot, 1 reinstall), Size of downloads: 0 kB