nvcc fatal : Unsupported gpu architecture 'compute_20' while cuda 9.1+caffe+openCV 3.4.0 is installed

Question

I have installed CUDA 9.1+cudnn-9.1+opencv 3.4.0+caffe.

When I tried to run make all -j8 in caffe directory, this error occurred:

Answer 1

This fixed it for me

cd caffe && mkdir build && cd build && \
   cmake -DUSE_CUDNN=1 -DUSE_NCCL=1 -DCUDA_ARCH_NAME=Manual -DCUDA_ARCH_BIN="50 52 60 61" .. && \
   sudo make -j"$(nproc)"

Just dropped 20 and 30 arch support