Error/segfault in basic test of CUDA-aware MPI

Specific Domains Julia at Scale
11

I just ran over this old topic and will quickly update it: meanwhile, CUDA-aware MPI works on the Cray system by just setting:

export MPICH_RDMA_ENABLED_CUDA=1
export JULIA_CUDA_USE_BINARYBUILDER=false

I guess the problem was simply that CUDA.jl did not use the system installation in the past as it does so only if JULIA_CUDA_USE_BINARYBUILDER=false is not only set at build time but also at runtime (at least with CUDA.jl v1).

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