錯誤：
VCC src/caffe/layers/softmax_loss_layer.cu
nvcc fatal : Unsupported gpu architecture 'compute_20'
Makefile:605: recipe for target '.build_release/cuda/src/caffe/layers/softmax_loss_layer.o' failed
make: *** [.build_release/cuda/src/caffe/layers/softmax_loss_layer.o] Error 1
解決方案：
在Makefile.config文件中根據自己CUDA的版本註釋不同的行。
# 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