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Fix CUDA Runtime CTK test fixture on Windows ARM64 #2534

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Fix CUDA Runtime CTK test fixture on Windows ARM64 #2534

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2b21582
Fix CUDA Runtime CTK test fixture on Windows ARM64
isVoid Aug 7, 2026
462c571
Make Windows CUDA Runtime fixtures explicit
isVoid Aug 7, 2026
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14 changes: 8 additions & 6 deletions cuda_pathfinder/tests/test_ctk_root_discovery.py
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Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,7 @@
DYNAMIC_LIB_SUBPROCESS_MODULE,
MODE_CANARY,
)
from cuda.pathfinder._utils.platform_aware import IS_WINDOWS
from cuda.pathfinder._utils.platform_aware import IS_WINDOWS, IS_WINDOWS_ARM64, IS_WINDOWS_X64
from cuda.pathfinder._utils.windows_arch import windows_python_arch

_MODULE = "cuda.pathfinder._dynamic_libs.load_nvidia_dynamic_lib"
Expand Down Expand Up @@ -80,14 +80,16 @@ def _create_nvvm_in_ctk(ctk_root):

def _create_cudart_in_ctk(ctk_root):
"""Create a fake cudart lib in the platform-appropriate CTK subdirectory."""
if IS_WINDOWS:
lib_dir = ctk_root / "bin"
lib_dir.mkdir(parents=True)
lib_file = lib_dir / "cudart64_12.dll"
if IS_WINDOWS_X64:
lib_dir = ctk_root / "bin" / "x64"
lib_file = lib_dir / "cudart64_13.dll"
elif IS_WINDOWS_ARM64:
lib_dir = ctk_root / "bin" / "arm64"
lib_file = lib_dir / "cudart64_13.dll"
else:
lib_dir = ctk_root / "lib64"
lib_dir.mkdir(parents=True)
lib_file = lib_dir / "libcudart.so"
lib_dir.mkdir(parents=True)
lib_file.write_bytes(b"fake")
return lib_file

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