Support ppc64le for CUDA 10.2

[leofang]

Close #6.

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipe) and found some lint.

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[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[leofang]

/usr/bin/which: no cuda-gdb in (/home/conda/feedstock_root/build_artifacts/cutensor_1622660207840/_build_env/bin:/home/conda/feedstock_root/build_artifacts/cutensor_1622660207840/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_pl/bin:/opt/conda/condabin:/home/conda/feedstock_root/build_artifacts/cutensor_1622660207840/_build_env:/home/conda/feedstock_root/build_artifacts/cutensor_1622660207840/_build_env/bin:/home/conda/feedstock_root/build_artifacts/cutensor_1622660207840/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_pl:/home/conda/feedstock_root/build_artifacts/cutensor_1622660207840/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_pl/bin:/opt/conda/bin:/opt/conda/condabin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/home/conda/bin)
Cannot determine CUDA_HOME: cuda-gdb not in PATH

https://dev.azure.com/conda-forge/feedstock-builds/_build/results?buildId=332029&view=logs&j=9a864fd9-6c8f-52ca-79ce-2aa6dca1a1de&t=10fc5aa2-324e-5982-4c88-6b31fcab16b3&l=147

@jaimergp Is something wrong with nvcc's activate script on ppc64le?

[jaimergp]

The problem is more on the Docker image side. For some reason, /usr/local/cuda/bin is not on PATH, despite conda-forge/docker-images#181

See workarounds in https://github.com/conda-forge/openmm-feedstock/pull/55/files#diff-f3725a55bf339595bf865fec73bda8ac99f283b0810c205442021f29c06eea9aR23

[leofang]

Ah nice, thanks @jaimergp for pointer!

[leofang]

hmmm...The compiler flags work on x86-64 but not on ppc64le...

++ nvcc -Xcompiler -mno-float128 -I/home/conda/feedstock_root/build_artifacts/cutensor_1622774225568/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/include -L/home/conda/feedstock_root/build_artifacts/cutensor_1622774225568/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib -lcutensor contraction.cu -o contraction
+ error_log='/home/conda/feedstock_root/build_artifacts/cutensor_1622774225568/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/bin/../lib/gcc/powerpc64le-conda-linux-gnu/8.4.0/../../../../powerpc64le-conda-linux-gnu/bin/ld: contraction: hidden symbol `cudaLaunchKernel'\'' in /usr/local/cuda/bin/../targets/ppc64le-linux/lib/libcudart_static.a(libcudart_static.a.o) is referenced by DSO
/home/conda/feedstock_root/build_artifacts/cutensor_1622774225568/_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/bin/../lib/gcc/powerpc64le-conda-linux-gnu/8.4.0/../../../../powerpc64le-conda-linux-gnu/bin/ld: final link failed: bad value
collect2: error: ld returned 1 exit status'

https://dev.azure.com/conda-forge/feedstock-builds/_build/results?buildId=332796&view=logs&j=9a864fd9-6c8f-52ca-79ce-2aa6dca1a1de&t=10fc5aa2-324e-5982-4c88-6b31fcab16b3&l=320

[github-actions]

Hi! This is the friendly conda-forge automerge bot!

I considered the following status checks when analyzing this PR:

• linter: passed
• azure: passed

Thus the PR was passing and merged! Have a great day!

[leofang]

@jaimergp Thanks again! 😁