Bugzilla Bug 149383

with USE="cddb", dev-libs/libcdio-0.77 and media-libs/libcddb-1.2.1 form a
circular dep.

ebuild / dev-libs/libcdio-0.77 merge depends on
   ebuild / media-libs/libcddb-1.2.1 merge (hard)
ebuild / media-libs/libcddb-1.2.1 merge depends on
   ebuild / dev-libs/libcdio-0.77 merge (hard)


Portage 2.1.2_pre1-r3 (default-linux/amd64/2006.1/desktop, gcc-4.1.1,
glibc-2.4-r3, 2.6.17-gentoo-r7 x86_64)
=================================================================
System uname: 2.6.17-gentoo-r7 x86_64 AMD Opteron(tm) Processor 152
Gentoo Base System version 1.12.5
Last Sync: Wed, 27 Sep 2006 12:50:01 +0000
app-admin/eselect-compiler: [Not Present]
dev-java/java-config: 1.3.7, 2.0.30
dev-lang/python:     2.4.3-r4
dev-python/pycrypto: 2.0.1-r5
dev-util/ccache:     [Not Present]
dev-util/confcache:  [Not Present]
sys-apps/sandbox:    1.2.17
sys-devel/autoconf:  2.13, 2.60
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2
sys-devel/binutils:  2.17-r2
sys-devel/gcc-config: 1.3.13-r3
sys-devel/libtool:   1.5.22
virtual/os-headers:  2.6.16
ACCEPT_KEYWORDS="amd64"
AUTOCLEAN="yes"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=opteron -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config
/usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config"
CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf
/etc/java-config/vms/ /etc/revdep-rebuild /etc/terminfo /etc/texmf/web2c"
CXXFLAGS="-march=opteron -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
EMERGE_DEFAULT_OPTS="-1"
FEATURES="autoconfig distlocks metadata-transfer parallel-fetch sandbox sfperms
strict userfetch userpriv usersandbox"
GENTOO_MIRRORS="http://mirror.datapipe.net/gentoo
http://gentoo.chem.wisc.edu/gentoo/"
LC_ALL="en_US.utf8"
LINGUAS="en"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --delete-after --stats --timeout=180
--exclude='/distfiles' --exclude='/local' --exclude='/packages'"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/opt/overlay/mine /usr/portage/local/layman/musicbrainz
/usr/portage/local/layman/my-lu_zero /usr/portage/local/layman/my-xfce
/usr/portage/local/layman/sunrise"
SYNC="rsync://rsync.namerica.gentoo.org/gentoo-portage"
USE="amd64 S3TC X a52 aac acpi acpi4linux adns alsa ao aoss aotuv apache2 ared
aredmem asf audiofile berkdb bitmap-fonts blender-game bzip2 cairo calendar cap
caps cddb cdparanoia cli crypt crypto css cups curl dbus dga divx djbfft
dlloader dmi dri dts dv dvb dvd dvdr dvdread edl elibc_glibc encode ethereal
exif exim exo extensions faac faad fam ffmpeg fftw firefox fla flac fontconfig
freetype gb gd gd-external gdbm gecko-sdk geoip gif gimp ginac glade glgd glitz
glut gmedia gmp gnomedb gnutls gpgme gphoto2 graphviz gtk gtk2 gtkhtml hal howl
ieee1394 imagemagick imap imlib imlib2 innodb input_devices_evdev
input_devices_keyboard input_devices_mouse javascript jikes jpeg junit kde
kdeenablefinal kdehiddenvisibility kernel_linux lcms lesstif libgda
libsamplerate linguas_en lirc lirc_devices_hauppauge live logitech-mouse lua
mad maildir mailwrapper matroska mime ming mjpeg mng mozcalendar mozdomi
mozilla moznocompose moznoirc moznomail mozsvg mp3 mp4 mpeg mpeg4 mplayer
mpm-prefork music musicbrainz mythtv ncurses nethack network new-login
no-old-linux no-seamonkey nocardbus nocd nowin nptl nptlonly nsplugin nvidia
offensive ogg oggvorbis ooo-kde openal openexr opengl oss pam panel-plugin pcap
pcre pda pdf perl physfs pic plotutils png posix povray ppds print python qa
qhull qt3 quicktime quotes readline reflection rtc samba sdk sdl session slp
smime snmp sockets speex spell spl sqlite ssl startup-notification stroke svg
tcpd tetex theora thumbnail thunar-vfs tidy tiff truetype truetype-fonts
type1-fonts udev ungif unicode usb userland_GNU v4l v4l2 vcd vhosts
video_cards_nvidia videos vim-with-x vorbis wmp x264 xinetd xml xml2 xorg xosd
xpm xrandr xscreensaver xv xvid xvmc yv12 zeroconf zlib"
Unset:  CTARGET, INSTALL_MASK, LANG, LDFLAGS, PORTAGE_RSYNC_EXTRA_OPTS

Thanks to kallamej this is solved now.