cmake config_error ai_generated true

CMake Error: Could not create named generator 'Ninja'. Generator 'Ninja' is not available. Use 'cmake --help' to see a list of available generators.

ID: cmake/generator-ninja-not-found

Also available as: JSON · Markdown · 中文
95%Fix Rate
90%Confidence
1Evidence
2023-07-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.14 active — — —
3.20 active — — —
3.24 active — — —
3.27 active — — —

Root Cause

CMake was invoked with -GNinja but Ninja is not installed or not in PATH, or the CMake installation does not include the Ninja generator (e.g., minimal install).

generic

中文

CMake 使用 -GNinja 调用，但 Ninja 未安装或不在 PATH 中，或者 CMake 安装不包含 Ninja 生成器（例如，最小安装）。

Official Documentation

https://cmake.org/cmake/help/latest/manual/cmake-generators.7.html

Workarounds

  1. 95% success Install Ninja: on Ubuntu, run 'sudo apt-get install ninja-build'; on macOS, 'brew install ninja'; on Windows, download from https://ninja-build.org/ and add to PATH. 
    Install Ninja: on Ubuntu, run 'sudo apt-get install ninja-build'; on macOS, 'brew install ninja'; on Windows, download from https://ninja-build.org/ and add to PATH.
  2. 90% success Use a different generator such as Unix Makefiles: cmake -G "Unix Makefiles" .. 
    Use a different generator such as Unix Makefiles: cmake -G "Unix Makefiles" ..
  3. 85% success If Ninja is installed but not in PATH, specify the full path: cmake -G Ninja -DCMAKE_MAKE_PROGRAM=/usr/local/bin/ninja .. 
    If Ninja is installed but not in PATH, specify the full path: cmake -G Ninja -DCMAKE_MAKE_PROGRAM=/usr/local/bin/ninja ..

中文步骤

  1. 安装 Ninja：在 Ubuntu 上运行 'sudo apt-get install ninja-build'；在 macOS 上运行 'brew install ninja'；在 Windows 上从 https://ninja-build.org/ 下载并添加到 PATH。
  2. 使用其他生成器，例如 Unix Makefiles：cmake -G "Unix Makefiles" ..
  3. 如果 Ninja 已安装但不在 PATH 中，请指定完整路径：cmake -G Ninja -DCMAKE_MAKE_PROGRAM=/usr/local/bin/ninja ..

Dead Ends

Common approaches that don't work:

  1. Reinstalling CMake without selecting the Ninja generator option 90% fail

    The Ninja generator is part of CMake's built-in generators; a reinstall without ensuring Ninja is in PATH does not help.

  2. Setting CMAKE_GENERATOR to Ninja in CMakeLists.txt 95% fail

    The generator is selected before CMakeLists.txt is parsed, so this setting has no effect; the error occurs at the configuration stage.

  3. Using -G "Ninja Multi-Config" as a substitute 85% fail

    If Ninja is not installed, the multi-config generator also fails because it requires the same underlying build tool.