NCCL fails to build on mac about nccl HOT 6 CLOSED

That usually means that your CUDA_HOME is not set properly. CUDA_HOME defaults to /usr/local/cuda ; you should set it to your CUDA installation path. Agreed, we could return a more explicit message.

Let me know if that fixes the problem.

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Thanks @sjeaugey!

I tried adding

export CUDA_HOME=/usr/local/cuda; make

and it seems to not work either.

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Setting CUDA_HOME to /usr/local/cuda should not change anything (it is already the default value). Given the output, it looks like "ls /usr/local/cuda/lib64/libcudart.so.*" fails. If you are sure the path is correct, then it may be a mac-specific issue.

Be aware that you may be the first person trying to compile NCCL on mac, so you are in unknown territory here.

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I think the problem is that on mac the directory should be lib not lib64.

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Thanks guys for the pointers - I think I have a solution by fixing the Makefile, will send a PR.

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#62 filed.

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