[BUG]: namespace "std" has no member "is_same_v"

[capybara-club]

Is this a duplicate?

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Type of Bug

Compile-time Error

Component

cuda.core

Describe the bug

I can't seem to get code like

std::is_same_v<T, f32>

to compile. I tried adding #include <cuda/std/type_traits> and that didn't fix it. I have c++17 set.

Any ideas?

How to Reproduce

def get_include_dir_cuda() -> Path:
 """Best-effort guess of the Toolkit’s <cuda>/include directory."""
 import os, shutil
 if os.getenv("CUDA_HOME"):
 return Path(os.environ["CUDA_HOME"]) / "include"
 # fall back to the directory that owns nvcc (works for most local installs)
 nvcc = shutil.which("nvcc")
 if nvcc:
 return Path(nvcc).parent.parent / "include"
 raise RuntimeError("Cannot find CUDA include directory")

code = r"""
 #include <cuda/std/type_traits>
 extern "C"
 __global__ 
 void 
 hello() {
 static_assert(std::is_same_v<float, float>);
 printf("hello from device\n");
 }
 """

dev = Device()
dev.set_current()
s = dev.create_stream()

arch = "".join(f"{i}" for i in dev.compute_capability)
print(f'arch:{arch}')

print(get_include_dir_cuda())
# Compile cuda to ptx
module_ptx = \
 Program(
 code, 
 code_type="c++", 
 options= \
 ProgramOptions(
 std="c++17", 
 arch=f"sm_{arch}",
 include_path=[get_include_dir_cuda()]
 )
 ).compile("ptx", logs=sys.stdout)

print(module_ptx.code.decode())

Expected behavior

Should compile.

Operating System

Ubuntu 24.04

nvidia-smi output

+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 575.55.01 Driver Version: 576.40 CUDA Version: 12.9 |
|-----------------------------------------+------------------------+----------------------+
| GPU Name Persistence-M | Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|=========================================+========================+======================|
| 0 NVIDIA GeForce RTX 4090 On | 00000000:01:00.0 On | Off |
| 0% 45C P3 63W / 450W | 2111MiB / 24564MiB | 0% Default |
| | | N/A |
+-----------------------------------------+------------------------+----------------------+

+-----------------------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=========================================================================================|
| No running processes found |
+-----------------------------------------------------------------------------------------+