cmake config_error ai_generated true

CMake 错误：CMAKE_CROSSCOMPILING 为 TRUE，但未设置 CMAKE_SYSTEM_NAME。

CMake Error: CMAKE_CROSSCOMPILING is TRUE but CMAKE_SYSTEM_NAME is not set.

ID: cmake/cross-compiling-toolchain-cmake-variable-not-set

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82%修复率
85%置信度
1证据数
2023-04-15首次发现

版本兼容性

版本状态引入弃用备注
cmake 3.22 active — — —
cmake 3.25 active — — —
cmake 3.28 active — — —

根因分析

在进行交叉编译时，CMake 需要在工具链文件或命令行中设置 CMAKE_SYSTEM_NAME，否则默认为主机系统，导致不匹配。

English

When cross-compiling, CMake requires CMAKE_SYSTEM_NAME to be set in the toolchain file or command line; otherwise, it defaults to the host system, causing a mismatch.

generic

官方文档

https://cmake.org/cmake/help/latest/manual/cmake-toolchains.7.html#cross-compiling

解决方案

  1. 在工具链文件中设置 CMAKE_SYSTEM_NAME，例如 set(CMAKE_SYSTEM_NAME Linux)。然后通过 -DCMAKE_TOOLCHAIN_FILE=/path/to/toolchain.cmake 传递工具链文件。
  2. 或者在命令行中设置 CMAKE_SYSTEM_NAME：cmake -DCMAKE_SYSTEM_NAME=Linux -DCMAKE_C_COMPILER=arm-linux-gnueabihf-gcc ..

无效尝试

常见但无效的做法:

  1. Setting CMAKE_CROSSCOMPILING to FALSE manually in CMakeLists.txt 95% 失败

    Overriding CMAKE_CROSSCOMPILING is a read-only variable; CMake ignores user attempts to set it.

  2. Adding set(CMAKE_SYSTEM_NAME Linux) in CMakeLists.txt instead of toolchain file 90% 失败

    CMAKE_SYSTEM_NAME must be set before the project() call; CMakeLists.txt executes after, so it has no effect.