[Caffe] - No.1 nvcc fatal : Unsupported gpu architecture 'compute_20'

编译Caffe出现以下错误：

nvcc fatal : Unsupported gpu architecture 'compute_20'

解决方法：

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

不支持compute_20 即把compute_20 所在行注释掉，然后make clean，重新make