ubuntu16.04自帶的ｇ++,gcc為5.4，因此另外安裝4.9
sudo apt install gcc-4.9 g++-4.9 export CC="gcc-4.9"
export CXX="g++-4.9"
激活anaconda
cd /home/aistudio/miniconda3/bin
source ./activate torch_build
設置cmake選項
export CMAKE_PREFIX_PATH=/home/aistudio/miniconda3/envs/torch_build
禁用nccl
export USE_NCCL=0
編譯
cd /home/aistudio/torch_build/pytorch-1.2.0
python setup.py clean
python setup.py install
python setup.py bdist_wheel