Caffe-GPU编译问题：nvcc fatal : Unsupported gpu architecture 'compute_20'

环境：

Ubuntu 16.04 

OpenCV 3.3

Cuda 9.0

编译出现问题

NVCC src/caffe/layers/bnll_layer.cu
nvcc fatal : Unsupported gpu architecture 'compute_20'
Makefile:594: recipe for target '.build_release/cuda/src/caffe/layers/bnll_layer.o' failed
make: *** [.build_release/cuda/src/caffe/layers/bnll_layer.o] Error 1
make: *** Waiting for unfinished jobs....


仔细查看了一下 Makefile.config 中 CUDA_ARCH 设置未按规定设置：

# CUDA architecture setting: going with all of them.
# For CUDA < 6.0, comment the *_50 through *_61 lines for compatibility.
# For CUDA < 8.0, comment the *_60 and *_61 lines for compatibility.
# For CUDA >= 9.0, comment the *_20 and *_21 lines for compatibility.
CUDA_ARCH := -gencode arch=compute_20,code=sm_20 \
-gencode arch=compute_20,code=sm_21 \
-gencode arch=compute_30,code=sm_30 \
-gencode arch=compute_35,code=sm_35 \
-gencode arch=compute_50,code=sm_50 \
-gencode arch=compute_52,code=sm_52 \
-gencode arch=compute_60,code=sm_60 \
-gencode arch=compute_61,code=sm_61 \
-gencode arch=compute_61,code=compute_61

因为我装的是CUDA9.0所以把下面这两行删除就可以了

-gencode arch=compute_20,code=sm_20 \
-gencode arch=compute_20,code=sm_21 \