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Add Windows ARM64 build support #2312

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Add Windows ARM64 build support #2312

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c4a131b
Add native Windows ARM64 CUDA bindings support
isVoid Jul 7, 2026
2b89547
Build cuda-core AOTI shim for Windows ARM64
isVoid Jul 7, 2026
fe20915
Merge remote-tracking branch 'upstream/main' into wangm/windows-arm64…
isVoid Jul 7, 2026
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5 changes: 4 additions & 1 deletion cuda_bindings/build_hooks.py
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Original file line number Diff line number Diff line change
Expand Up @@ -400,7 +400,10 @@ def _build_cuda_bindings(debug=False):
os.path.dirname(sysconfig.get_path("include")),
] + include_path_list
library_dirs = [sysconfig.get_path("platlib"), os.path.join(os.sys.prefix, "lib")]
cudalib_subdirs = [r"lib\x64"] if sys.platform == "win32" else ["lib64", "lib"]
if sys.platform == "win32":
cudalib_subdirs = [r"lib\arm64"] if sysconfig.get_platform() == "win-arm64" else [r"lib\x64"]
else:
cudalib_subdirs = ["lib64", "lib"]
library_dirs.extend(os.path.join(cuda_path, subdir) for subdir in cudalib_subdirs)

extra_compile_args = []
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10 changes: 7 additions & 3 deletions cuda_core/setup.py
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Original file line number Diff line number Diff line change
Expand Up @@ -27,20 +27,24 @@ def _ensure_compiler_initialized(compiler, plat_name):
initialize(plat_name)


def _build_aoti_shim_lib(compiler):
def _build_aoti_shim_lib(compiler, plat_name):
# Reuse setuptools' initialized MSVC compiler instead of rediscovering
# lib.exe separately in the build backend.
lib_exe = getattr(compiler, "lib", None)
if not lib_exe:
raise RuntimeError("MSVC compiler did not expose lib.exe after initialization.")

_AOTI_SHIM_LIB_FILE.parent.mkdir(exist_ok=True)
machine = {
"win-amd64": "X64",
"win-arm64": "ARM64",
}.get(plat_name, "X64")
compiler.spawn(
[
lib_exe,
f"/DEF:{_AOTI_SHIM_DEF_FILE}",
f"/OUT:{_AOTI_SHIM_LIB_FILE}",
"/MACHINE:X64",
f"/MACHINE:{machine}",
]
)
return str(_AOTI_SHIM_LIB_FILE)
Expand All @@ -58,7 +62,7 @@ def _configure_windows_tensor_bridge(self):
continue

_ensure_compiler_initialized(self.compiler, self.plat_name)
shim_lib = _build_aoti_shim_lib(self.compiler)
shim_lib = _build_aoti_shim_lib(self.compiler, self.plat_name)
link_args = list(ext.extra_link_args or [])
if shim_lib not in link_args:
ext.extra_link_args = [*link_args, shim_lib]
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