Fix sgl-kernel compile for sm80 (#3046)

sgl-kernel/setup.py

@@ -24,6 +24,22 @@ def update_wheel_platform_tag():
         old_wheel.rename(new_wheel)
 
 
+def get_cuda_version():
+    if torch.version.cuda:
+        return tuple(map(int, torch.version.cuda.split(".")))
+    return (0, 0)
+
+
+def get_device_sm():
+    if torch.cuda.is_available():
+        major, minor = torch.cuda.get_device_capability()
+        return major * 10 + minor
+    return 0
+
+
+cuda_version = get_cuda_version()
+sm_version = get_device_sm()
+
 cutlass = root / "3rdparty" / "cutlass"
 flashinfer = root / "3rdparty" / "flashinfer"
 include_dirs = [
@@ -42,12 +58,15 @@ nvcc_flags = [
     "-gencode=arch=compute_80,code=sm_80",
     "-gencode=arch=compute_89,code=sm_89",
     "-gencode=arch=compute_90,code=sm_90",
-    "-gencode=arch=compute_90a,code=sm_90a",
     "-std=c++17",
     "-use_fast_math",
     "-DFLASHINFER_ENABLE_F16",
     "-DFLASHINFER_ENABLE_BF16",
 ]
+
+if cuda_version >= (12, 0) and sm_version >= 90:
+    nvcc_flags.append("-gencode=arch=compute_90a,code=sm_90a")
+
 for flag in [
     "-D__CUDA_NO_HALF_OPERATORS__",
     "-D__CUDA_NO_HALF_CONVERSIONS__",