SciPy 0.9.0-r1 on x86 displaying the issue. Python 2.7.2 (default, Oct 28 2011, 08:51:01) [GCC 4.4.5] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import scipy.linalg Traceback (most recent call last): File "", line 1, in File "/usr/lib/python2.7/site-packages/scipy/linalg/__init__.py", line 9, in from basic import * File "/usr/lib/python2.7/site-packages/scipy/linalg/basic.py", line 14, in from lapack import get_lapack_funcs File "/usr/lib/python2.7/site-packages/scipy/linalg/lapack.py", line 15, in from scipy.linalg import clapack ImportError: /usr/lib/python2.7/site-packages/scipy/linalg/clapack.so: undefined symbol: clapack_sgesv ------------------------------ The x86 machine's emerge --info $ emerge --info Portage 2.1.10.44 (default/linux/x86/10.0, gcc-4.5.3, glibc-2.13-r4, 3.1.10-gentoo-r1-vrydag i686) ================================================================= System uname: Linux-3.1.10-gentoo-r1-vrydag-i686-Intel-R-_Pentium-R-_M_processor_1.60GHz-with-gentoo-2.0.3 Timestamp of tree: Tue, 24 Apr 2012 13:00:01 +0000 distcc 3.1 i686-pc-linux-gnu [disabled] ccache version 3.1.6 [enabled] app-shells/bash: 4.1_p9 dev-java/java-config: 2.1.11-r3 dev-lang/python: 2.7.2-r3, 3.1.4-r3 dev-util/ccache: 3.1.6 dev-util/cmake: 2.8.6-r4 dev-util/pkgconfig: 0.26 sys-apps/baselayout: 2.0.3 sys-apps/openrc: 0.9.8.4 sys-apps/sandbox: 2.5 sys-devel/autoconf: 2.13, 2.68 sys-devel/automake: 1.11.1 sys-devel/binutils: 2.21.1-r1 sys-devel/gcc: 4.4.5, 4.5.3-r1 sys-devel/gcc-config: 1.4.1-r1 sys-devel/libtool: 2.4-r1 sys-devel/make: 3.82-r1 sys-kernel/linux-headers: 3.1 (virtual/os-headers) sys-libs/glibc: 2.13-r4 Repositories: gentoo ACCEPT_KEYWORDS="x86" ACCEPT_LICENSE="* -@EULA AdobeFlash-10.1 skype-eula dlj-1.1" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=i686 -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-O2 -march=i686 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="assume-digests binpkg-logs ccache distlocks ebuild-locks fixlafiles news parallel-fetch protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch" FFLAGS="" GENTOO_MIRRORS="http://gentoo.tiscali.nl/ http://ftp-stud.fht-esslingen.de/pub/Mirrors/gentoo/ http://ftp.snt.utwente.nl/pub/os/linux/gentoo" LANG="en_US.UTF-8" LC_ALL="en_US.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LINGUAS="en zh_CN ja nl" MAKEOPTS="" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://woensdag/gentoo-portage" USE="X aac acl alsa bash-completion berkdb bzip2 cli consolekit cracklib crypt cups cxx dbus dri encode faac faad ffmpeg fortran gdbm gif gnome gpm gtk hal iconv ipv6 jpeg lame libnotify mad mmx modules mp3 mudflap ncurses nls nptl nptlonly ogg openal opengl openmp pam pcre png policykit pppd qt3support readline samba session sse sse2 ssl startup-notification svg sysfs tcpd theora tiff truetype udev unicode vim-syntax vorbis wifi x264 x86 xorg xvid zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1 emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en zh_CN ja nl" PHP_TARGETS="php5-3" QEMU_SOFTMMU_TARGETS="i386" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="radeon" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON