cmake config_error ai_generated true

CMake 错误：目标 "mycudatarget" 的 CUDA_ARCHITECTURES 为空

CMake Error: CUDA_ARCHITECTURES is empty for target "mycudatarget"

ID: cmake/cuda-architectures-empty

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90%修复率
88%置信度
1证据数
2023-12-01首次发现

版本兼容性

版本状态引入弃用备注
CMake 3.18 active — — —
CMake 3.19 active — — —
CMake 3.20 active — — —

根因分析

CMake 3.18+ 要求为所有启用 CUDA 的目标设置 CUDA_ARCHITECTURES；空值或未设置变量会触发此错误，以防止不支持的架构代码。

English

CMake 3.18+ requires CUDA_ARCHITECTURES to be set for all CUDA-enabled targets; an empty value or unset variable triggers this error to prevent unsupported architecture code.

generic

官方文档

https://cmake.org/cmake/help/latest/prop_tgt/CUDA_ARCHITECTURES.html

解决方案

  1. set_target_properties(mycudatarget PROPERTIES CUDA_ARCHITECTURES "75;80")
# Or use the native arch detection:
set(CMAKE_CUDA_ARCHITECTURES "native")
  2. set(CMAKE_CUDA_ARCHITECTURES "75;80")
add_library(mycudatarget CUDA mycuda.cu)

无效尝试

常见但无效的做法:

  1. 100% 失败

    CMake interprets OFF as an empty string, still triggering the error.

  2. 100% 失败

    An empty string is still empty; CMake requires a non-empty list of architectures.