Bugzilla Bug 130803

as title, d4x runs perfect on my system, I have a new amd64 system.

here is the emerge --info 
Portage 2.1_pre7-r5 (default-linux/amd64/2006.0, gcc-4.1.0, glibc-2.4-r1,
2.6.15-gentoo-r8 x86_64)
=================================================================
System uname: 2.6.15-gentoo-r8 x86_64               Intel(R) Pentium(R) D CPU
3.00GHz
Gentoo Base System version 1.6.14
dev-lang/python:     2.4.2
sys-apps/sandbox:    1.2.12
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:  2.16.91.0.6
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="-O2 -march=nocona -fomit-frame-pointer -pipe -fno-ident -ftracer -fweb
-frename-registers"
CHOST="x86_64-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/share/X11/xkb /usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/eselect/compiler /etc/gconf /etc/terminfo
/etc/texmf/web2c /etc/env.d"
CXXFLAGS="-O2 -march=nocona -fomit-frame-pointer -pipe -fno-ident -ftracer
-fweb -frename-registers -fno-enforce-eh-specs"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig ccache distlocks metadata-transfer sandbox sfperms strict"
GENTOO_MIRRORS="http://ftp.twaren.net/Linux/Gentoo/
http://open-systems.ufl.edu/mirrors/gentoo http://cudlug.cudenver.edu/gentoo/"
LC_ALL="en_US.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--sort-common -Wl,--enable-new-dtags -Wl,-Bdirect
-Wl,-hashvals -Wl,-zdynsort"
MAKEOPTS="-j8"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://raptor.gentoo.org/gentoo-portage"
USE="amd64 X a52 aac aalib accessibility acl acpi alsa apache2 arts audiofile
authdaemond avi bash-completion bcmath berkdb bitmap-fonts bluetooth bonobo
bzip2 bzlib cairo cdr cjk cli crypt cscope ctype cups curl dbus directfb dmi
dmx dri dts dvd dvdr dynamic eds emacs-w3 emboss encode esd exif expat fam
fbcon ffmpeg firefox flac foomaticdb fortran freetype gd ggi gif gimpprint
glitz glut gmp gnome gnutls gphoto2 gpm gstreamer gtk gtk2 gtkhtml guile hal
iconv idn imagemagick imlib immqt-bc ipv6 isdnlog ithreads jack java javascript
jikes joystick jpeg jpeg2k junit kdeenablefinal kerberos lcms ldap libcaca lirc
lm_sensors logrotate lzw lzw-tiff maildir mailwrapper matroska memlimit mime
mmap mng motif mp3 mpeg mpi mysql mysqli nas ncurses nis nls nntp nocardbus
nptl nptlonly nsplugin odbc offensive ogg openal openexr opengl pam pcmcia
pcntl pcre pda pdflib perl php plotutils png pnp portaudio posix postgres ppds
pppd profile python qt quicktime readline reflection ruby samba sasl sdl
session sftplogging skey slang slp sndfile snmp soap socks5 speex spell spl
sqlite ssl svg symlink tcltk tcpd tetex theora threads tiff truetype
truetype-fonts trusted type1-fonts unicode usb vcd vhosts vorbis wmf xine
xinerama xml xml2 xorg xpm xprint xv xvid zlib elibc_glibc input_devices_mouse
input_devices_keyboard input_devices_joystick input_devices_evdev kernel_linux
userland_GNU video_cards_nv video_cards_none"
Unset:  ASFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LINGUAS

stable on amd64.