chrishkchris commented on issue #624: [WIP] SINGA-487 Include NCCL and MPICH in conda build URL: https://github.com/apache/singa/pull/624#issuecomment-598734929 I simplified the selection logic to use only one environment variable CUDA: 1. export CUDA = 9.0, then use CUDA9.0 without nccl and moich 2. export CUDA = 10.0, then use CUDA10.0 without nccl and mpich 3. export CUDA = DIST, then use CUDA10.0 WITH nccl and mpich 4. without export CUDA, then use CPU only If we need two environment variables (CUDA and USE_DIST) to determine the selection logic, I can change it.
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