Merge pull request cupy#8958 from chainer-ci/bp-8952-v13-use_cxx17

[backport] Broaden usage of C++17
chainer-ci · Feb 18, 2025 · 59af44a · 59af44a
2 parents bc50cde + c986201
commit 59af44a
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diff --git a/cupy/_core/_cub_reduction.pyx b/cupy/_core/_cub_reduction.pyx
@@ -36,7 +36,8 @@ cdef function.Function _create_cub_reduction_function(
         #    license issue we can't yet bundle bf16 headers. CUB offers us a
         #    band-aid solution to avoid including the latter (NVIDIA/cub#478,
         #    nvbugs 3641496).
-        options += ('--std=c++11', '-DCUB_DISABLE_BF16_SUPPORT')
+        # 3. Recent CCCL versions need C++17.
+        options += ('--std=c++17', '-DCUB_DISABLE_BF16_SUPPORT')
 
     cdef str backend
     if runtime._is_hip_environment:

diff --git a/cupy/_functional/vectorize.py b/cupy/_functional/vectorize.py
@@ -98,7 +98,7 @@ def __call__(self, *args):
             kern = _core.ElementwiseKernel(
                 in_params, out_params, body, 'cupy_vectorize',
                 preamble=result.code,
-                options=('-DCUPY_JIT_MODE', '--std=c++14'),
+                options=('-DCUPY_JIT_MODE', '--std=c++17'),
             )
             self._kernel_cache[itypes] = kern