emerge --info gives:
Portage 2.1.2.2 (default-linux/ppc/2005.1/ppc, gcc-4.1.1, glibc-2.4-r4, 2.6.18-gentoo-r3-reiser4 ppc)
=================================================================
System uname: 2.6.18-gentoo-r3-reiser4 ppc 7410, altivec supported
Gentoo Base System release 1.12.9
Timestamp of tree: Mon, 23 Apr 2007 20:50:01 +0000
distcc 2.18.3 powerpc-unknown-linux-gnu (protocols 1 and 2) (default port 3632) [disabled]
ccache version 2.4 [enabled]
dev-java/java-config: 1.3.7, 2.0.30
dev-lang/python:     2.4.3-r4
dev-python/pycrypto: 2.0.1-r5
dev-util/ccache:     2.4-r7
sys-apps/sandbox:    1.2.17
sys-devel/autoconf:  2.13, 2.61
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10
sys-devel/binutils:  2.17
sys-devel/gcc-config: 1.3.15-r1
sys-devel/libtool:   1.5.22
virtual/os-headers:  2.6.17-r2
ACCEPT_KEYWORDS="ppc"
AUTOCLEAN="yes"
CBUILD="powerpc-unknown-linux-gnu"
CFLAGS="-O2 -pipe -mcpu=7400 -maltivec -mabi=altivec"
CHOST="powerpc-unknown-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config"
CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf /etc/java-config/vms/ /etc/revdep-rebuild /etc/terminfo"
CXXFLAGS="-O2 -pipe -mcpu=7400 -maltivec -mabi=altivec"
DISTDIR="/usr/portage/distfiles"
FEATURES="ccache distlocks metadata-transfer sandbox sfperms strict"
GENTOO_MIRRORS="http://gentoo.inode.at/"
LINGUAS="de"
MAKEOPTS="-j3"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --filter=H_**/files/digest-*"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="X a52 aac aalib alsa altivec apache2 bitmap-fonts bzip2 cairo cdparanoia cdr cli cracklib crypt cups dri dts dv dvd dvdr dvdread eds emboss encode exif ffmpeg flac fortran gif gimp glitz gphoto2 gpm gstreamer gtk gtk2 hal iconv ieee1394 imlib ipv6 isdnlog jack jack-tmpfs java jpeg kde kdexdeltas ladspa lcms libcaca libwww midi mng motif mp3 mp4 mpeg mysql ncurses nls nptl nptlonly ogg oggvorbis opengl pam pcmcia pcre pdf perl php png ppc pppd python qt qt3 qt4 quicktime readline reflection rtc samba scanner session spell spl ssl svg tcl tcpd theora tiff tk truetype truetype-fonts type1-fonts unicode usb v4l v4l2 vcd vorbis wifi wmf x264 xinerama xml xml2 xorg xv xvid zlib" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw multi null plug rate route share shm softvol" ELIBC="glibc" INPUT_DEVICES="keyboard mouse synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="de" USERLAND="GNU" VIDEO_CARDS="fbdev r128 v4l vga"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY