pycuda -- 'CUDA_ROOT not set, and nvcc not in path.'

pycuda
George picture George · Dec 3, 2011 · Viewed 22.9k times · Source

Although i had installed pycuda and using it ok,it started (without doing sth) not to work.So,i i tried to do the install again ,but when i am doing

python configure.py --cuda-root=/usr/local/cuda/bin

it gives me the error in the title.

The nvcc file is in the above directory.

Answer

jkysam picture jkysam · Dec 3, 2011

pycuda is not finding nvcc. Did you try adding /usr/local/cuda/bin to your env PATH variable? That's the way I have this setup.

Edit:

As far as I can tell the configure.py doesn't call nvcc compiler it just creates the the makefile. I take that this problem happens when you run sudo -c "make install" which calls setup.py.

A couple of things to try. Make sure that you have CUDA_ROOT set:

echo $CUDA_ROOT

If it's empty, set it with:

export CUDA_ROOT=/usr/local/cuda/bin

Try running the make command again. Now with the -E to preserve your env:

sudo -E sh -c "make install"

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