When I upgraded to MySQL 5.0.19, it installed nothing but deleted the previous version of MySQL. Portage 2.1_pre6-r3 (default-linux/x86/2005.0, gcc-3.4.5, glibc-2.4-r1, 2.6.15-gentoo i686) ================================================================= System uname: 2.6.15-gentoo i686 AMD Athlon(tm) processor Gentoo Base System version 1.12.0_pre16 dev-lang/python: 2.3.5, 2.4.2-r1 sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1 sys-devel/binutils: 2.16.1-r2 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.11-r3 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-march=athlon -O3 -pipe -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-march=athlon -O3 -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig candy distlocks metadata-transfer sandbox sfperms strict" GENTOO_MIRRORS="http://gentoo.math.bme.hu http://gentoo.inf.elte.hu/ ftp://ftp.du.se/pub/os/gentoo/" LANG="hu_HU.UTF-8" LC_ALL="hu_HU.UTF-8" LINGUAS="hu" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 3dnow 3dnowext X aac acpi alsa apache2 arts avi berkdb bitmap-fonts bzip2 cairo cdr crypt cups dga dri eds emboss encode faad foomaticdb gdbm gif gtk gtk2 hal icq imlib java jpeg kde libg++ libwww lm_sensors mad mikmod mmx mmxext motif mp3 mpeg mysql ncurses nls nsplugin ogg oggvorbis opengl pam pdflib perl png python qt quicktime readline rtc samba sdl spell ssl tcpd tiff truetype truetype-fonts type1-fonts unicode usb v4l2 vorbis wmf xine xml2 xmms xosd xv xvid zlib elibc_glibc kernel_linux linguas_hu userland_GNU" Unset: ASFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, LDFLAGS, MAKEOPTS
Don't restrict bugs...
FWIW, following the unslotting guide worked for me on two boxes, x86 & amd64.
Strange, it worked for me also, however another code cleanup has been committed the past night, try it again and have a look at unslotting guide [1], maybe there is still some trash from previous installs. slotted MySQL will be available soon as an overlay, but I suggest it only if having multiple mysql installations is usefull. [1] http://www.gentoo.org/doc/en/mysql-upgrade-slotted.xml