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build: 升级C++编译标准至c++20 #3478
chz34创建于 20 天前
build: 升级C++编译标准至c++20 #3478
已合并
chz34创建于 20 天前
从c_34/torchaircpp20合入到Ascend/torchairmaster
chz34
chz34
20 天前

背景

新版 PyTorch 头文件强制要求 C++20，torchair 仍以 C++17 编译时，构建 torch_npu 目标报错：

ATen/ATen.h:5: #error C++20 or later compatible compiler is required to use ATen.
torch/all.h:5: #error C++20 or later compatible compiler is required to use PyTorch.

torch_npu_stub.cpp 经 GetCANNInfo.h 引入 torch 头，因编译标准为 C++17 触发上述 #error。

[2026/07/30 20:12:06.576 GMT+08:00] [ 56%] Built target _abi_compat_ge_apis
[2026/07/30 20:12:06.576 GMT+08:00] [ 57%] Building CXX object torchair/CMakeFiles/_torchair.dir/cann_ir_ability/cann_ir_ability.cpp.o
[2026/07/30 20:12:06.576 GMT+08:00] [ 61%] Building CXX object torchair/CMakeFiles/_torchair.dir/concrete_graph/export.cpp.o
[2026/07/30 20:12:06.576 GMT+08:00] [ 61%] Building CXX object torchair/CMakeFiles/_torchair.dir/concrete_graph/executor.cpp.o
[2026/07/30 20:12:06.576 GMT+08:00] [ 63%] Building CXX object torchair/CMakeFiles/_torchair.dir/concrete_graph/concrete_graph.cpp.o
[2026/07/30 20:12:06.576 GMT+08:00] [ 64%] Building CXX object torchair/CMakeFiles/_torchair.dir/concrete_graph/hdc_channel.cpp.o
[2026/07/30 20:12:06.576 GMT+08:00] [ 64%] Building CXX object torchair/CMakeFiles/_torchair.dir/concrete_graph/logger.cpp.o
[2026/07/30 20:12:06.576 GMT+08:00] [ 66%] Building CXX object torchair/CMakeFiles/_torchair.dir/concrete_graph/npu_aoe.cpp.o
[2026/07/30 20:12:06.576 GMT+08:00] In file included from /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/torch.h:4,
[2026/07/30 20:12:06.576 GMT+08:00]                  from /workspace/CODE/third_party/torchair/torchair/torchair/include/executor.h:10,
[2026/07/30 20:12:06.576 GMT+08:00]                  from /workspace/CODE/third_party/torchair/torchair/torchair/concrete_graph/executor.cpp:1:
[2026/07/30 20:12:06.576 GMT+08:00] /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/all.h:5:2: error: #error C++20 or later compatible compiler is required to use PyTorch.
[2026/07/30 20:12:06.576 GMT+08:00]     5 | #error C++20 or later compatible compiler is required to use PyTorch.
[2026/07/30 20:12:06.576 GMT+08:00]       |  ^~~~~
[2026/07/30 20:12:06.577 GMT+08:00] In file included from /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/torch.h:4,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /workspace/CODE/third_party/torchair/torchair/torchair/include/executor.h:10,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /workspace/CODE/third_party/torchair/torchair/torchair/include/concrete_graph.h:8,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /workspace/CODE/third_party/torchair/torchair/torchair/concrete_graph/concrete_graph.cpp:3:
[2026/07/30 20:12:06.577 GMT+08:00] /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/all.h:5:2: error: #error C++20 or later compatible compiler is required to use PyTorch.
[2026/07/30 20:12:06.577 GMT+08:00]     5 | #error C++20 or later compatible compiler is required to use PyTorch.
[2026/07/30 20:12:06.577 GMT+08:00]       |  ^~~~~
[2026/07/30 20:12:06.577 GMT+08:00] In file included from /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/torch.h:4,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /workspace/CODE/third_party/torchair/torchair/torchair/include/executor.h:10,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /workspace/CODE/third_party/torchair/torchair/torchair/include/concrete_graph.h:8,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /workspace/CODE/third_party/torchair/torchair/torchair/concrete_graph/export.cpp:4:
[2026/07/30 20:12:06.577 GMT+08:00] /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/all.h:5:2: error: #error C++20 or later compatible compiler is required to use PyTorch.
[2026/07/30 20:12:06.577 GMT+08:00]     5 | #error C++20 or later compatible compiler is required to use PyTorch.
[2026/07/30 20:12:06.577 GMT+08:00]       |  ^~~~~
[2026/07/30 20:12:06.577 GMT+08:00] [ 67%] Building CXX object torchair/CMakeFiles/_torchair.dir/concrete_graph/session.cpp.o
[2026/07/30 20:12:06.577 GMT+08:00] In file included from /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/types.h:4,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/data/dataloader_options.h:5,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/data/dataloader/base.h:4,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/data/dataloader/stateful.h:5,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/data/dataloader.h:4,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/data.h:4,
[2026/07/30 20:12:06.577 GMT+08:00]                  from /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/torch/csrc/api/include/torch/all.h:10:
[2026/07/30 20:12:06.577 GMT+08:00] /opt/_internal/cpython-3.10.20/lib/python3.10/site-packages/torch/include/ATen/ATen.h:5:2: error: #error C++20 or later compatible compiler is required to use ATen.
[2026/07/30 20:12:06.577 GMT+08:00]     5 | #error C++20 or later compatible compiler is required to use ATen.

改动

  • CMake 构建：CMAKE_CXX_STANDARD 17 → 20（CMakeLists.txt、tests/CMakeLists.txt），torch_npu_local_stub 等 stub 目标随之以 C++20 编译。
  • 运行时 g++ 编译：-std=c++17 → -std=c++20（custom_op_compiler.py、inductor_npu_ext compiler/revert_ascir、示例 setup.py）。
  • 测试：torchair_customop_compiler_st.py 断言同步更新为 -std=c++20。
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Pull Request已成功合入, 合并人@ascend-robot
（感谢 chz34 的贡献）
chz34chz34
20 天前 创建了 pull request，commit 6a50ae39
atomgit-bot
atomgit-bot
20 天前 评论：

变更摘要

此 PR 将项目中所有显式指定的 C++ 编译标准从 -std=c++17 统一升级为 -std=c++20，涉及示例扩展模块的构建脚本、Inductor NPU 编译器后端、自定义算子编译器及其单元测试等 8 个文件，变更均为编译标志字符串的版本号替换。

主要改动

  • 示例模块 setup.py 编译标志升级：examples/_kernel_extension_aclgraph/pybind/setup.py 和 torch_library/setup.py 中的 AscendBuildExtension 将 g++ 编译参数 -std=c++17 替换为 -std=c++20。
  • Inductor NPU 编译器后端升级：experimental/_inductor_npu_ext 下的 revert_ascir.py（AscCompilerStub 类的三处 g++ 命令）与 _compiler.py（_build_cpp、compile_wrapper、compile_tiling_wrapper 函数）均将 -std=c++17 改为 -std=c++20。
  • 自定义算子编译器升级：python/torchair/_ge_concrete_graph/custom_op_compiler.py 中 build_gcc_command 函数将编译标志从 -std=c++17 改为 -std=c++20。
  • 单元测试同步更新：tests/st/torchair_customop_compiler_st.py 中 TestBuildGccCommand 的断言字符串同步从 -std=c++17 更新为 -std=c++20，保持测试与实现一致。
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20 天前 评论：

代码审查

✅ 未发现问题

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CLA Signature Guide

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20 天前 评论：

Thanks for your pull-request.
The full list of commands accepted by me can be found at here。
You can get sig-info at here

PR Approval Progress

✅ Congratulations! All modules have met the lgtm and approve requirements.

Module Approval Details

module lgtm status approve status
repo-Ascend/torchair ✅ fu-hao-huawei, XDaoHong (2/2) ✅ fu-hao-huawei (1/1)

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smoke

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compile

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20 天前 评论：

/approve

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/lgtm

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【MR评价】评价分数:3,
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