host detection portion of various configure scripts prints out " Invalid configuration `x86_64-pc-linux-gnu': machine `x86_64-pc' not recognized" and eventually the build fails. Looking at the config.sub files in gtk-flat-theme-0.1 and gtk-flat-theme-2.0 directories, it looks like the "case $basic_machine in" does not have a case for x86_64-*. I hacked a case in there but then ltconfig fails with "too many arguments". Reproducible: Always Steps to Reproduce: 1. On an amd64/x86_64 system: emerge -vU =gtk-engines-flat-2.0-r1 Actual Results: emerge failed with problems not recognizing the x86_64 designator in my host/machine type and also ltconfig problems. Expected Results: It should have built the package. Or the package should have been masked for amd64 systems. Portage 2.0.50-r8 (default-amd64-2004.0, gcc-3.3.3, glibc-2.3.4.20040605-r0, 2.6.5-gentoo-r1) ================================================================= System uname: 2.6.5-gentoo-r1 x86_64 5 Gentoo Base System version 1.4.16 ccache version 2.3 [enabled] Autoconf: sys-devel/autoconf-2.59-r3 Automake: sys-devel/automake-1.8.3 ACCEPT_KEYWORDS="amd64" AUTOCLEAN="yes" CFLAGS="-O2 -pipe" CHOST="x86_64-pc-linux-gnu" COMPILER="gcc3" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.2/share/config /usr/kde/3/share/config /usr/lib/mozilla/defaults/pref /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs ccache sandbox sfperms strict userpriv usersandbox" GENTOO_MIRRORS="http://gentoo.mirrors.pair.com/ http://mirror.datapipe.net/gentoo ftp://gentoo.ccccom.com" MAKEOPTS="-j3" PKGDIR="/packages-amd64" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage-overlay/" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X alsa amd64 apm arts avi berkdb cdr crypt cups dga doc encode esd foomaticdb gdbm ggi gif gnome gpm gtk gtk2 guile imlib java jpeg kde libg++ libwww mikmod motif mozilla mpeg multilib ncurses nls nogcj oggvorbis opengl oss pam pdflib perl png python qt quicktime readline sdl slang spell ssl tcltk tcpd tetex tiff truetype xml2 xmms xv zlib"
Solved uzsing gnuconfig_update.