I just had a problem with my glibc. When it was upgraded to glibc-2.3.5, the GLX module of X stopped working. After some debugging, I found out that it happened because the package 'emul-linux-x86-glibc' was still the same as glibc was before the upgrade (2.3.4-20041102). It seems both packages must be the same version. The same happens with nvidia packages (nvidia-kernel and nvidia-glx). There could be a way of masking, say, 'glibc >= emul-linux-x86-glibc'. The way it is now, I have to go, mask the newer glibcs and look for newer emul-linux-x86-glibc from time to time. Reproducible: Always Steps to Reproduce: 1. 2. 3. Portage 2.0.51.20-r4 (default-linux/amd64/2004.3, gcc-3.4.3, glibc-2.3.4.20041102-r0, 2.6.11-gentoo-r3 x86_64) ================================================================= System uname: 2.6.11-gentoo-r3 x86_64 AMD Athlon(tm) 64 Processor 3000+ Gentoo Base System version 1.6.11 dev-lang/python: 2.3.5 sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.5 sys-devel/binutils: 2.15.92.0.2-r7 sys-devel/libtool: 1.5.14 virtual/os-headers: 2.6.11 ACCEPT_KEYWORDS="amd64 ~amd64" AUTOCLEAN="yes" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=athlon64 -O2 -pipe -fomit-frame-pointer" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/lib/X11/xkb /usr/lib/mozilla/defaults/pref /usr/share/config /var/bind /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/texmf/web2c /etc/env.d" CXXFLAGS="-march=athlon64 -O2 -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks sandbox strict" GENTOO_MIRRORS="http://mirror.datapipe.net/gentoo http://gentoo.eliteitminds.com http://open-systems.ufl.edu/mirrors/gentoo ftp://ftp.ussg.iu.edu/pub/linux/gentoo ftp://linux.rz.ruhr-uni-bochum.de/gentoo-mirror/ http://ftp-stud.fht-esslingen.de/pub/Mirrors/gentoo/ http://linux.rz.ruhr-uni-bochum.de/download/gentoo-mirror/ ftp://ftp-stud.fht-esslingen.de/pub/Mirrors/gentoo/ ftp://mirror.nutsmaas.nl/gentoo/ ftp://gentoo.mirrors.tds.net/gentoo http://gentoo.mirrors.tds.net/gentoo ftp://ftp.heanet.ie/pub/gentoo/ http://ftp.heanet.ie/pub/gentoo/ http://gentoo.ccccom.com http://gentoo.inode.at/ ftp://gentoo.inode.at/source/ ftp://ftp.snt.utwente.nl/pub/os/linux/gentoo http://ftp.snt.utwente.nl/pub/os/linux/gentoo ftp://gentoo.ccccom.com http://linuv.uv.es/mirror/gentoo/ http://gentoo.mirror.icd.hu/ ftp://ftp.ndlug.nd.edu/pub/gentoo/ http://www.mirrorservice.org/sites/www.ibiblio.org/gentoo/ http://gentoo.osuosl.org/ http://ftp.linux.ee/pub/gentoo/distfiles/ ftp://mirrors1.netvisao.pt/gentoo/ ftp://ftp.linux.ee/pub/gentoo/distfiles/ http://gentoo.seren.com/gentoo ftp://www.mirrorservice.org/sites/www.ibiblio.org/gentoo/ ftp://ftp.ntua.gr/pub/linux/gentoo/ http://ftp.ntua.gr/pub/linux/gentoo/ http://gentoo.blueyonder.co.uk ftp://gentoo.blueyonder.co.uk/mirrors/gentoo http://mirror.aiya.ru/pub/gentoo/" LANG="en_US.UTF-8" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="amd64 16bit X aac aalib acpi acpi4linux aim alsa apache2 avi bash-completion berkdb bitmap-fonts bluetooth bonobo bzlib cdr crypt cups curl dga dvd esd exif fam font-server foomaticdb fortran ftp gd gdbm gif gnome gphoto2 gstreamer gtk gtk2 gtkhtml guile icq imagemagick imlib jabber java jp2 jpeg libwww lzw lzw-tiff mad maildir mikmod motif mozilla moznocompose moznoirc moznomail mp3 mpeg msn multilib ncurses nls nvidia offensive ogg oggvorbis opengl oss pam pam_console perl png postgres ppds readline sasl sdl ssl tcpd tetex tiff truetype truetype-fonts type1-fonts usb userlocales vorbis xml xml2 xmms xpm xrandr xv xvid yahoo zlib" Unset: ASFLAGS, CTARGET, LC_ALL, LDFLAGS, LINGUAS, PORTDIR_OVERLAY
This is a bug with glibc and/or emul-linux-x86-glibc. Specific versions of packages are able block specific versions of other packages already.
Upgrade your system to 2005.0, glibc builds native 32bit there which means that you always have the same version of both, 32bit and 64bit.
