Error: command '/usr/local/cuda/bin/nvcc' failed with exit status 1

[basit26374]

When I compile deformable convolutional layers

cd external/DCNv2 python setup.py build develop

I got this error

error: command '/usr/local/cuda/bin/nvcc' failed with exit status 1

Environment info:
Ubuntu 18.04
CUDA 9.0
python 3.6
torch== 1.1.0
torchvision=== 0.2.0

[dbolya]

Did the error message print anything else out? That just means compilation failed. I can't really help without knowing where it failed.

[basit26374]

@dbolya thanks for your reply. I solved this problem. Actually problems with gcc and g++ version.
I have installed gcc and g++ 6.5.0 version but this is not compatible with CUDA 9.0.
see this
facebookresearch/maskrcnn-benchmark#25 (comment)

Environment info:
Ubuntu 18.04
CUDA 9.0
python 3.6
torch== 1.1.0
torchvision=== 0.2.0
gcc and g++ version 6.5.0

Step to solve this problem:

1. sudo apt-get install gcc-5 g++-5

2. link from gcc 6 g++ 6 to gcc 5 g++ 5
   sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 50 --slave /usr/bin/g++ g++ /usr/bin/g++-5 --slave /usr/bin/gcov gcov /usr/bin/gcov-5

sudo update-alternatives --config gcc

and select gcc 5 version

see this blog post
https://linuxize.com/post/how-to-install-gcc-compiler-on-ubuntu-18-04/

3. compile deformable convolutional layers
   cd external/DCNv2
python setup.py build develop

and Done !!!