Bugzilla Bug 94997

Stepmania now compiles and runs fine on amd64, please add amd64 to the
keywords.

[ebuild   R   ] games-arcade/stepmania-3.9_rc3  -debug +gtk +jpeg +mad +mpeg
+oggvorbis 0 kB

I'm quite excited to confirm this!

here's my emerge info:

Portage 2.0.51.19 (default-linux/amd64/2005.0, gcc-3.4.3,
glibc-2.3.4.20041102-r1, 2.6.11-gentoo-r7 x86_64)
=================================================================
System uname: 2.6.11-gentoo-r7 x86_64 AMD Athlon(tm) 64 Processor 3200+
Gentoo Base System version 1.4.16
Python:              dev-lang/python-2.3.5 [2.3.5 (#1, May 21 2005, 05:10:34)]
distcc 2.18.3 x86_64-pc-linux-gnu (protocols 1 and 2) (default port 3632) [disabled]
dev-lang/python:     2.3.5
sys-apps/sandbox:    [Not Present]
sys-devel/autoconf:  2.59-r6, 2.13
sys-devel/automake:  1.7.9-r1, 1.8.5-r3, 1.5, 1.4_p6, 1.6.3, 1.9.5
sys-devel/binutils:  2.15.92.0.2-r10
sys-devel/libtool:   1.5.16
virtual/os-headers:  2.6.8.1-r4
ACCEPT_KEYWORDS="amd64"
AUTOCLEAN="yes"
CFLAGS="-O2 -march=athlon64 -pipe -fomit-frame-pointer"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.3/env
/usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3.4/env
/usr/kde/3.4/share/config /usr/kde/3.4/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="-O2 -march=athlon64 -pipe -fomit-frame-pointer"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoaddcvs autoconfig ccache distlocks sandbox sfperms strict"
GENTOO_MIRRORS="http://gentoo.ccccom.com
ftp://ftp.ucsb.edu/pub/mirrors/linux/gentoo/ http://gentoo.osuosl.org/"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="amd64 X aac aalib acpi alsa avi bash-completion berkdb bitmap-fonts cd
cdparanoia cdr crypt cups curl directfb dts dvd dvdr dvdread encode esd fam
fbcon flac font-server foomaticdb fortran gdbm gif glut gpm gtk gtk2 imagemagick
imlib ipv6 jack java jikes jp2 jpeg kdeenablefinal libcaca lzw lzw-tiff mad
matroska mikmod motif mozilla mp3 mpeg ncurses network nls nptl nptlonly nvidia
ogg oggvorbis opengl oss pam perl pic png ppds python qt quicktime readline real
rtc samba sdl spell ssl tcpd threads tiff truetype truetype-fonts type1-fonts
unicode usb userlocales vorbis xine xinerama xml2 xmms xpm xprint xrandr xv xvid
xvmc zlib video_cards_nvidia userland_GNU kernel_linux elibc_glibc"
Unset:  ASFLAGS, CBUILD, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS

Fixed in cvs - thanks.