emerge '=dev-python/pycuda-2011.2.2' ... x86_64-pc-linux-gnu-g++ -pthread -O2 -pipe -march=core2 -mtune=generic -fPIC -DPYGPU_PYCUDA=1 -DPYGPU_PACKAGE=pycuda -DHAVE_CURAND=1 -DHAVE_GL =1 -Isrc/cpp -I/usr/include -I/opt/cuda/include -I/usr/lib64/python2.7/site-packages/numpy/core/include -I/usr/include/python2.7 -c src/wrappe r/mempool.cpp -o build-2.7/temp.linux-x86_64-2.7/src/wrapper/mempool.o x86_64-pc-linux-gnu-g++ -pthread -O2 -pipe -march=core2 -mtune=generic -fPIC -DPYGPU_PYCUDA=1 -DPYGPU_PACKAGE=pycuda -DHAVE_CURAND=1 -DHAVE_GL =1 -Isrc/cpp -I/usr/include -I/opt/cuda/include -I/usr/lib64/python2.7/site-packages/numpy/core/include -I/usr/include/python2.7 -c src/wrappe r/wrap_cudagl.cpp -o build-2.7/temp.linux-x86_64-2.7/src/wrapper/wrap_cudagl.o x86_64-pc-linux-gnu-g++ -pthread -O2 -pipe -march=core2 -mtune=generic -fPIC -DPYGPU_PYCUDA=1 -DPYGPU_PACKAGE=pycuda -DHAVE_CURAND=1 -DHAVE_GL =1 -Isrc/cpp -I/usr/include -I/opt/cuda/include -I/usr/lib64/python2.7/site-packages/numpy/core/include -I/usr/include/python2.7 -c src/wrappe r/wrap_curand.cpp -o build-2.7/temp.linux-x86_64-2.7/src/wrapper/wrap_curand.o x86_64-pc-linux-gnu-g++ -pthread -shared -Wl,-O1 -Wl,--as-needed -O2 -pipe -march=core2 -mtune=generic build-2.7/temp.linux-x86_64-2.7/src/cpp /cuda.o build-2.7/temp.linux-x86_64-2.7/src/cpp/bitlog.o build-2.7/temp.linux-x86_64-2.7/src/wrapper/wrap_cudadrv.o build-2.7/temp.linux-x86_6 4-2.7/src/wrapper/mempool.o build-2.7/temp.linux-x86_64-2.7/src/wrapper/wrap_cudagl.o build-2.7/temp.linux-x86_64-2.7/src/wrapper/wrap_curand. o -L/usr/lib64 -L/usr/lib64 -L/opt/cuda/lib -L/opt/cuda/lib64 -L/usr/lib64 -lboost_python-mt -lboost_thread-mt -lcuda -lcurand -lpython2.7 -o build-2.7/lib.linux-x86_64-2.7/pycuda/_driver.so /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lboost_python-mt collect2: ld returned 1 exit status
Nevermind, this seems to be fixed in dev-python/pycuda-2011.2.2-r1. Sorry for the noise.