Upon upgrading to pyopenclc-2014.1 I am no longer able to import pyopencl: freddie@fluorine ~ $ python Python 2.7.6 (default, Apr 26 2014, 11:45:33) [GCC 4.7.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import pyopencl Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib64/python2.7/site-packages/pyopencl/__init__.py", line 28, in <module> import pyopencl._cl as _cl ImportError: /usr/lib64/python2.7/site-packages/pyopencl/_cl.so: undefined symbol: clCreateSubDevices I am using the NVIDIA binary blob driver: fluorine Programming # eselect opencl list Available OpenCL implementations: [1] mesa [2] nvidia * Reproducible: Always
Please post your `emerge --info' output in a comment.
fluorine ~ # emerge --info Portage 2.2.10 (default/linux/amd64/13.0/desktop/kde, gcc-4.7.3, glibc-2.19, 3.14.4-gentoo x86_64) ================================================================= System uname: Linux-3.14.4-gentoo-x86_64-Intel-R-_Core-TM-_i7-2600K_CPU_@_3.40GHz-with-gentoo-2.2 KiB Mem: 16424424 total, 7053432 free KiB Swap: 0 total, 0 free Timestamp of tree: Sat, 07 Jun 2014 09:30:01 +0000 ld GNU ld (Gentoo 2.24 p1.4) 2.24 app-shells/bash: 4.2_p47 dev-java/java-config: 2.2.0 dev-lang/python: 2.7.6-r1, 3.3.5, 3.4.0 dev-util/cmake: 2.8.12.2-r1 dev-util/pkgconfig: 0.28-r1 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.12.4 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.11.6, 1.14.1 sys-devel/binutils: 2.24-r3 sys-devel/gcc: 4.7.3-r1, 4.8.2 sys-devel/gcc-config: 1.8 sys-devel/libtool: 2.4.2-r1 sys-devel/make: 4.0-r1 sys-kernel/linux-headers: 3.14 (virtual/os-headers) sys-libs/glibc: 2.19 Repositories: gentoo science ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=native" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/themes/oxygen-gtk/gtk-2.0" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /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 -pipe -march=native" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://distfiles.gentoo.org" LANG="en_GB.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j8" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/var/lib/layman/science" USE="X a52 aac acl alsa amd64 bash-completion berkdb bluetooth branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cryptsetup cuda cups cxx dbus declarative dri dts dvd dvdr emboss enchant encode exif fam firefox flac fortran gdbm gif git gpm graphite gtk iconv icu ipv6 jpeg kde kipi lapack latex lcms libnotify llvm-shared-libs luatex mad metis mmx mng modules mp3 mp4 mpeg mpi multilib ncurses networkmanager nls nptl ogg opencl opengl openmp opus pam pango pcre pdf phonon plasma png policykit ppds pulseaudio python qt qt3support qt4 readline resolvconf sdl semantic-desktop session spell sqlite sse sse2 ssl startup-notification svg tcpd threads tiff truetype udev udisks unicode upower usb vdpau vorbis wxwidgets x264 xcb xcomposite xetex xinerama xml xscreensaver xv xvid zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd 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 author" 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 ublox ubx" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en_GB" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_3" RUBY_TARGETS="ruby19 ruby20" USERLAND="GNU" VIDEO_CARDS="nvidia" 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" USE_PYTHON="2.7 3.3" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, SYNC
$ ebuild pyopencl-2014.1.ebuild clean install >>> Completed installing pyopencl-2014.1 into /mnt/gen2/TmpDir/portage/dev-python/pyopencl-2014.1/image/ /mnt/gen2/TmpDir/portage/dev-python/pyopencl-2014.1/image/usr/lib64/python3.3/site-packages $ PYTHONPATH=. python3.3 -c "import pyopencl" yielded success. All things are not equal. $ eselect opencl listAvailable OpenCL implementations: [1] intel * Can you get it to install under an alternate listing, at all
I will look into getting an alternate listing installed. My understanding is that an OpenCL stack consists of three parts: a set of header files, an installable client driver loader, and the client drivers themselves. NVIDIA only supports OpenCL 1.1 and as such their ICD loader does not expose any OpenCL 1.2 functions. clCreateSubDevices appears to be one of these OpenCL 1.2 functions. However, the header files provided by: app-admin/eselect-opencl-1.1.0-r2 do contain definitions for OpenCL 1.2 functions. It therefore looks to me as if pyopencl is assuming the availability of OpenCL 1.2 functions (on account of the header files prototyping them) when the ICD loader does not know of their existence. Possible reassign to the eselect-opencl maintainers?
I switched to the mesa OpenCL driver loader and re-emerged pyopencl. The result was the same. Next I tried removing the header files in /usr/include/CL and replacing them with the OpenCL 1.1 headers. I then switched back to the nvidia OpenCL driver loader and re-meerged pyopencl. Everything now works as expected. At the moment my understanding can therefore be summarised as "if you wish to use pyopencl on a system with NVIDIA hardware it is necessary to compile pyopencl against the OpenCL 1.1 header files."
+ 14 Jul 2014; Patrick Lauer <patrick@gentoo.org> + +eselect-opencl-1.1.0-r3.ebuild: + Revert switch to opencl-1.2 headers, needs proper switching logic. Fixes + #512680
