The sci-biology/treeviewx ebuild only has the x86 keyword. On amd64 I first installed wxGTK with USE="X" (to be sure) and then installed the treeviewx-0.5.1 without any problem (by feeding the ebuild to emerge directly). (I did it this way because I couldn't figure out how to use package.keywords or any other package.* file in this case. Not even after reading man pages etc.) My initial tests show that the program works well on amd64. No problems at this point. I suggest that it is given testing status at least. /Torsten emerge --info: Portage 2.0.54 (default-linux/amd64/2005.1, gcc-3.4.4, glibc-2.3.5-r2, 2.6.15-gentoo-r5 x86_64) ================================================================= System uname: 2.6.15-gentoo-r5 x86_64 AMD Athlon(tm) 64 Processor 3200+ Gentoo Base System version 1.6.14 dev-lang/python: 2.3.5-r2, 2.4.2 sys-apps/sandbox: 1.2.11 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 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="amd64" AUTOCLEAN="yes" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=k8 -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/env.d" CXXFLAGS="-march=k8 -O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks sandbox sfperms strict" GENTOO_MIRRORS="ftp://ftp.linux.ee/pub/gentoo/distfiles/ ftp://trumpetti.atm.tut.fi/gentoo/ ftp://ftp.du.se/pub/os/gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="amd64 X alsa audiofile avi bash-completion berkdb bitmap-fonts bzip2 cdr crypt cups dri eds emboss encode esd exif expat fam foomaticdb fortran gif glut gnome gpm gstreamer gtk gtk2 gtkhtml idn imlib ipv6 jpeg lcms lzw lzw-tiff mng motif mozilla mp3 mpeg ncurses nls opengl pam pdflib perl png python qt quicktime readline sdl spell ssl tcpd tiff truetype truetype-fonts type1-fonts udev usb xml2 xpm xv zlib userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS, PORTDIR_OVERLAY
~amd64 added. Thanks for testing.