now, i’m stuck in compiling caffe2. It complains:
  C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.CppCommon.targets(209,5): error MSB6006: "cmd.exe" exited with code 1. [C:\python\pytorch\build\caffe2\caffe2_gpu.vcxproj]