PR #16882: Symlink hermetic cuda headers to permit clang cuda version detection

Imported from GitHub PR openxla/xla#16882

Fixes #16877
Copybara import of the project:

--
1ff356ac0870002b369c3ec09547aae2a62c70e2 by tchatow <[email protected]>:

Symlink hermetic cuda headers to permit clang cuda version detection

Fixes #16877

Merging this change closes #16882

PiperOrigin-RevId: 679764212

Author: tchatow

.bazelrc

@@ -242,6 +242,8 @@ build:cuda_clang --copt=-Qunused-arguments
 # major release. Example: sm_80 kernels can run on sm_89 GPUs but
 # not on sm_90 GPUs. compute_80 kernels though can also run on sm_90 GPUs.
 build:cuda_clang --repo_env=HERMETIC_CUDA_COMPUTE_CAPABILITIES="sm_60,sm_70,sm_80,sm_89,compute_90"
+# Permit newer CUDA versions than Clang is aware of
+build:cuda_clang --copt="-Wno-unknown-cuda-version"
 # Set lld as the linker.
 build:cuda_clang --host_linkopt="-fuse-ld=lld"
 build:cuda_clang --host_linkopt="-lm"

third_party/gpus/cuda/hermetic/cuda_redist_init_repositories.bzl

@@ -219,6 +219,10 @@ def _create_libcuda_symlinks(
         repository_ctx.symlink(nvidia_driver_path, "lib/libcuda.so.1")
         repository_ctx.symlink("lib/libcuda.so.1", "lib/libcuda.so")
 
+def _create_cuda_header_symlinks(repository_ctx):
+    if repository_ctx.name == "cuda_nvcc":
+        repository_ctx.symlink("../cuda_cudart/include/cuda.h", "include/cuda.h")
+
 def use_local_path(repository_ctx, local_path, dirs):
     # buildifier: disable=function-docstring-args
     """Creates repository using local redistribution paths."""
@@ -339,6 +343,7 @@ def _use_downloaded_cuda_redistribution(repository_ctx):
         repository_ctx,
         lib_name_to_version_dict,
     )
+    _create_cuda_header_symlinks(repository_ctx)
     repository_ctx.file("version.txt", major_version)
 
 def _cuda_repo_impl(repository_ctx):