NVIDIA / NVIDIA/apex

Strange FileNotFoundError

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Python
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Description

When use pip install -v --no-cache-dir --global-option="--cpp_ext" --global-option="--cuda_ext" ./ for installation, raise an error FileNotFoundError: [Errno 2] No such file or directory: ':/usr/local/cuda-9.0/bin/nvcc'

What is :/usr/local/cuda-9.0/bin/nvcc? I mean : is strange and can ubuntu not find :/usr/local/cuda-9.0/bin/nvcc, not /usr/local/cuda-9.0/bin/nvcc?

Meanwhile, I have installed nvcc9.0

nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2017 NVIDIA Corporation
Built on Fri_Sep__1_21:08:03_CDT_2017
Cuda compilation tools, release 9.0, V9.0.176

We can see: -rwxr-xr-x 1 dx dx 189888 Sep 20 19:58 /usr/local/cuda-9.0/bin/nvcc*

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Research direction

Start by reproducing the pip install command with --cpp_ext and --cuda_ext, then trace how the nvcc executable path is assembled during installation. Confirm whether the leading colon is introduced by the build configuration; done means the command resolves /usr/local/cuda-9.0/bin/nvcc and installation proceeds successfully.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
build-system
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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