pytorch

447f5b5e - [bazel] enable sccache+nvcc in CI (#95528)

[bazel] enable sccache+nvcc in CI (#95528) Fixes #79348 This change is mostly focused on enabling nvcc+sccache in the PyTorch CI. Along the way we had to do couple tweaks: 1. Split the rules_cc from the rules_cuda that embeeded them before. This is needed in order to apply a different patch to the rules_cc compare to the one that rules_cuda does by default. This is in turn needed because we need to workaround an nvcc behavior where it doesn't send `-iquote xxx` to the host compiler, but it does send `-isystem xxx`. So we workaround this problem with (ab)using `-isystem` instead. Without it we are getting errors like `xxx` is not found. 2. Workaround bug in bazel https://github.com/bazelbuild/bazel/issues/10167 that prevents us from using a straightforward and honest `nvcc` sccache wrapper. Instead we generate ad-hock bazel specific nvcc wrapper that has internal knowledge of the relative bazel paths to local_cuda. This allows us to workaround the issue with CUDA symlinks. Without it we are getting `undeclared inclusion(s) in rule` all over the place for CUDA headers. ## Test plan Green CI build https://github.com/pytorch/pytorch/actions/runs/4267147180/jobs/7428431740 Note that now it says "CUDA" in the sccache output ``` + sccache --show-stats Compile requests 9784 Compile requests executed 6726 Cache hits 6200 Cache hits (C/C++) 6131 Cache hits (CUDA) 69 Cache misses 519 Cache misses (C/C++) 201 Cache misses (CUDA) 318 Cache timeouts 0 Cache read errors 0 Forced recaches 0 Cache write errors 0 Compilation failures 0 Cache errors 7 Cache errors (C/C++) 7 Non-cacheable compilations 0 Non-cacheable calls 2893 Non-compilation calls 165 Unsupported compiler calls 0 Average cache write 0.116 s Average cache read miss 23.722 s Average cache read hit 0.057 s Failed distributed compilations 0 ``` Pull Request resolved: https://github.com/pytorch/pytorch/pull/95528 Approved by: https://github.com/huydhn