Unison 2.10.2 works on amd64 now. Previous versions segfaulted but this is fine, syncing with the same version on X86. Reproducible: Always Steps to Reproduce: 1. Add ~amd64 to KEYWORDS in ebuild 2. emerge unison 3. run unison Actual Results: It worked exactly as it should. [root@hactar ~]# emerge info Portage 2.0.51_rc7 (default-linux/amd64/gcc34-2004.2, gcc-3.4.1, glibc-2.3.4.20040808-r0, 2.6.8-gentoo-r4 x86_64) ================================================================= System uname: 2.6.8-gentoo-r4 x86_64 AMD Athlon(tm) 64 Processor 3200+ Gentoo Base System version 1.5.3 distcc 2.17 x86_64-pc-linux-gnu (protocols 1 and 2) (default port 3632) [disabled] Autoconf: sys-devel/autoconf-2.59-r4 Automake: sys-devel/automake-1.8.5-r1 Binutils: sys-devel/binutils-2.15.90.0.1.1-r3 Headers: sys-kernel/linux26-headers-2.6.8.1 Libtools: sys-devel/libtool-1.5.2-r5 ACCEPT_KEYWORDS="amd64 ~amd64" AUTOCLEAN="yes" CFLAGS="-march=athlon64 -O2 -pipe -fomit-frame-pointer -funit-at-a-time" CHOST="x86_64-pc-linux-gnu" COMPILER="" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.3/share/config:/usr/kde/3.3/env:/usr/kde/3.3/shutdown /usr/kde/3/share/config /usr/lib/mozilla/defaults/pref /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-march=athlon64 -O2 -pipe -fomit-frame-pointer -funit-at-a-time" DISTDIR="/mnt/portage/distfiles" FEATURES="autoaddcvs buildpkg ccache" GENTOO_MIRRORS="ftp://ftp.tu-clausthal.de/pub/linux/gentoo/ ftp://ftp.heanet.ie/pub/gentoo/ ftp://ftp.belnet.be/mirror/rsync.gentoo.org/gentoo/ ftp://ftp.uni-erlangen.de/pub/mirrors/gentoo/ ftp://ftp.easynet.nl/mirror/gentoo/" MAKEOPTS="-j2" PKGDIR="/mnt/portage/packages/hactar" PORTAGE_TMPDIR="/mnt/scratch" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/mnt/portage/local /mnt/portage/bmg-main" SYNC="rsync://desatio/gentoo" USE="X aalib alsa amd64 apache2 apm arts artswrappersuid avi berkdb bitmap-fonts bonobo cdr crypt cups directfb dv dvd dvdr encode esd foomaticdb gdbm gif gimpprint gphoto2 gpm gtk gtk2 gtkhtml guile imlib jabber java jbig jpeg kde ldap lesstif libg++ libwww mad mailwrapper mikmod mozilla mpeg multilib mysql ncurses nls nptl oggvorbis opengl oss pam pdflib perl png ppds python qt quicktime readline samba scanner sdl slang slp spell ssl tcltk tcpd tiff truetype usb xml2 xmms xprint xv xvid zlib video_cards_nvidia linguas_en_GB"
Fixed in CVS, thanks.