Hello. I have just tried to compile PyCUDA 90bf8d282c58fb9c3a14aa0ded537dbe4dd7a68f from 2011-01-18 and it fails with error gcc -pthread -fno-strict-aliasing -fwrapv -Wall -O3 -DNDEBUG -g -O2 -fPIC -DPYGPU_PACKAGE=pyopencl -DHAVE_GL=1 -Isrc/cpp -I/usr/include/nvidia-current -I/usr/lib/pymodules/python2.5/numpy/core/include -I/usr/include/python2.5 -c src/wrapper/wrap_cl.cpp -o build/temp.linux-x86_64-2.5/src/wrapper/wrap_cl.o In file included from src/wrapper/wrap_cl.cpp:1: src/wrapper/wrap_cl.hpp: In function ‘boost::python::handle<_object> pyopencl::get_mem_obj_host_array(boost::python::api::object, boost::python::api::object, boost::python::api::object, boost::python::api::object)’: src/wrapper/wrap_cl.hpp:3117: warning: comparison between signed and unsigned integer expressions src/wrapper/wrap_cl.cpp: In function ‘void init_module__cl()’: src/wrapper/wrap_cl.cpp:21: error: ‘pyopencl_expose_mempool’ was not declared in this scope error: command 'gcc' failed with exit status 1 Attached patch fixes this problem. -- Tomasz Rybak &lt;bogomips(a)post.pl&gt; GPG/PGP key ID: 2AD5 9860 Fingerprint A481 824E 7DD3 9C0E C40A 488E C654 FB33 2AD5 9860 http://member.acm.org/~tomaszrybak