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project_6/cccl_upstream/cub/cub/util_cpp_dialect.cuh
EngineX CI 56fd68e7dd [INFRA] Import NVIDIA/CCCL upstream as optimization reference library
CCCL (CUDA C++ Core Libraries) provides:
- CUB: device/block/warp-level GPU primitives (reduce, scan, sort, topk)
- Thrust: high-level parallel algorithms (transform_reduce, sort, scan)
- libcudacxx: CUDA C++ standard library (atomics, barriers, memory)
- cudax: experimental features (memory resources, allocators)
- Tuning policies: per-SM hardware-specific algorithm parameters

Competition optimization vectors mapped to CCCL:
- Output TPS (83% weight): warp_reduce, block_reduce, device_topk
- Input TPS (14% weight): device_scan, block_load, prefetch
- Cache TPS (3% weight): prefix caching strategy patterns
- Memory (0.9 util): pooled/cached/buddy allocators

Source: https://github.com/NVIDIA/cccl (shallow clone, HEAD only)
License: Apache-2.0
2026-07-30 09:35:51 +00:00

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// SPDX-FileCopyrightText: Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
// SPDX-License-Identifier: BSD-3
//! @file
//! Detect the version of the C++ standard used by the compiler.
#pragma once
#include <cuda/__cccl_config>
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
#ifndef _CCCL_DOXYGEN_INVOKED // Do not document
// Deprecation warnings may be silenced by defining the following macros. These
// may be combined.
// - CCCL_IGNORE_DEPRECATED_COMPILER
// Ignore deprecation warnings when using deprecated compilers. Compiling
// with deprecated C++ dialects will still issue warnings.
//! Deprecated [Since 3.0]
# define CUB_CPP_DIALECT _CCCL_STD_VER
// Define CUB_COMPILER_DEPRECATION macro:
# if _CCCL_COMPILER(MSVC) || _CCCL_COMPILER(NVRTC)
# define CUB_COMP_DEPR_IMPL(msg) _CCCL_PRAGMA(message(__FILE__ ":" _CCCL_TO_STRING(__LINE__) ": warning: " #msg))
# else // clang / gcc:
# define CUB_COMP_DEPR_IMPL(msg) _CCCL_PRAGMA(GCC warning #msg)
# endif
// Compiler checks:
// clang-format off
# define CUB_COMPILER_DEPRECATION(REQ) \
CUB_COMP_DEPR_IMPL(CUB requires at least REQ. Define CCCL_IGNORE_DEPRECATED_COMPILER to suppress this message.)
# define CUB_COMPILER_DEPRECATION_SOFT(REQ, CUR) \
CUB_COMP_DEPR_IMPL( \
CUB requires at least REQ. CUR is deprecated but still supported. CUR support will be removed in a \
future release. Define CCCL_IGNORE_DEPRECATED_COMPILER to suppress this message.)
// clang-format on
# ifndef CCCL_IGNORE_DEPRECATED_COMPILER
# if _CCCL_COMPILER(GCC, <, 7)
CUB_COMPILER_DEPRECATION(GCC 7.0);
# elif _CCCL_COMPILER(CLANG, <, 7)
CUB_COMPILER_DEPRECATION(Clang 7.0);
# elif _CCCL_COMPILER(MSVC, <, 19, 10)
// <2017. Hard upgrade message:
CUB_COMPILER_DEPRECATION(MSVC 2019(19.20 / 16.0 / 14.20));
# endif
# endif // CCCL_IGNORE_DEPRECATED_COMPILER
# undef CUB_COMPILER_DEPRECATION_SOFT
# undef CUB_COMPILER_DEPRECATION
// C++17 dialect check:
# ifndef CCCL_IGNORE_DEPRECATED_CPP_DIALECT
# if _CCCL_STD_VER < 2017
# error CUB requires at least C++17. Define CCCL_IGNORE_DEPRECATED_CPP_DIALECT to suppress this message.
# endif // _CCCL_STD_VER < 2017
# endif
# undef CUB_COMP_DEPR_IMPL
#endif // !_CCCL_DOXYGEN_INVOKED