Something

CFLAGS="-O2 -march=k8 -mno-3dnow -msse -msse2 -msse3 -mfpmath=sse -ffast-math -funsafe-math-optimizations -fweb -frename-registers -ftracer -fomit-frame-pointer -pipe"
CHOST="x86_64-pc-linux-gnu"
CXXFLAGS="${CFLAGS}"
LDFLAGS="-Wl,-O1 -Wl,--enable-new-dtags -Wl,--sort-common -Wl,--strip-all"
MAKEOPTS="-j3"
USE="cddb dvdread dts kqemu win32codecs apache2 lm_sensors xscreensaver \
     offensive xinerama opengl ln_sensors xvid rtc -ipv6 -mozilla \
     -oss -berkdb -gnome nptl nptlonly userlocales mmx mmx2 \
     mmxext sse sse2 sse3 ithreads pthreads alsa kde qt gtk2 samba \
     bzip2 sqlite ffmpeg server nvidia opengl bitmap-fonts \
     truetype-fonts type1-fonts symlink java flac ogg vorbis xmms \
     kdeenablefinal kdehiddenvisibility win32codecs truetype firefox cups \
     cdr dvdr xcomposite mp3 encode spell gif X jpeg png tiff gtk \
     unicode fbcon sdl ssl arts -hal qt3 usb mpeg qt4 quicktime \
     dbus dvd crypt glitz svg pdf custom-flags custom-cflags"
GENTOO_MIRRORS="http://mirror.datapipe.net/gentoo"
PORTDIR_OVERLAY="/usr/local/overlay"
ACCEPT_KEYWORDS="~amd64"
PORTAGE_NICENESS="19"
FEATURES="parallel-fetch"
VIDEO_CARDS="nvidia v4l vesa vga vmware"
PORTDIR_OVERLAY="/usr/local/overlays/star /usr/local/overlays/sabayon/overlay /usr/local/overlays/xgl-coffee /usr/local/overlays/gentopia"