When I try to build torch from source. I get error:

CMake Error at /home/yiyuezhuo/Downloads/pytorch-master/cmake/FindCUDA/FindCUDA/select_compute_arch.cmake:142 (message):  
Unknown CUDA Architecture Name 2.1(2.0) in CUDA_SELECT_NVCC_ARCH_FLAGS

I look the file select_compute_arch.cmake, I don't know cmake script very well. But I think of the value of arch_name variable is "2.1(2.0)", but it can't be matched by the origin logic. From origin code, it seem likes having same meaning as "Fermi". So I insert these line into select_compute_arch.make:

    elseif(arch_name STREQUAL "2.1(2.0)")
      set(arch_bin 2.0 "2.1(2.0)")

then it works.