cmake config_error ai_generated true

CMake Error: toolchain file not found or invalid: /path/to/toolchain.cmake

ID: cmake/toolchain-file-not-found

Also available as: JSON · Markdown · 中文
92%Fix Rate
86%Confidence
1Evidence
2023-07-18First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
CMake 3.10 active — — —
CMake 3.18 active — — —
CMake 3.26 active — — —

Root Cause

The path specified via -DCMAKE_TOOLCHAIN_FILE does not exist, is not a file, or contains syntax errors.

generic

中文

通过 -DCMAKE_TOOLCHAIN_FILE 指定的路径不存在、不是文件或包含语法错误。

Official Documentation

https://cmake.org/cmake/help/latest/variable/CMAKE_TOOLCHAIN_FILE.html

Workarounds

  1. 95% success Use absolute path: cmake -DCMAKE_TOOLCHAIN_FILE=/full/path/to/toolchain.cmake /path/to/source 
    Use absolute path: cmake -DCMAKE_TOOLCHAIN_FILE=/full/path/to/toolchain.cmake /path/to/source
  2. 90% success Check file existence: ls -la /path/to/toolchain.cmake and verify it has no syntax errors by running cmake -P /path/to/toolchain.cmake. 
    Check file existence: ls -la /path/to/toolchain.cmake and verify it has no syntax errors by running cmake -P /path/to/toolchain.cmake.
  3. 85% success Set the toolchain file in a cache variable before project(): set(CMAKE_TOOLCHAIN_FILE "${CMAKE_SOURCE_DIR}/toolchain.cmake" CACHE PATH "") 
    Set the toolchain file in a cache variable before project(): set(CMAKE_TOOLCHAIN_FILE "${CMAKE_SOURCE_DIR}/toolchain.cmake" CACHE PATH "")

中文步骤

  1. Use absolute path: cmake -DCMAKE_TOOLCHAIN_FILE=/full/path/to/toolchain.cmake /path/to/source
  2. Check file existence: ls -la /path/to/toolchain.cmake and verify it has no syntax errors by running cmake -P /path/to/toolchain.cmake.
  3. Set the toolchain file in a cache variable before project(): set(CMAKE_TOOLCHAIN_FILE "${CMAKE_SOURCE_DIR}/toolchain.cmake" CACHE PATH "")

Dead Ends

Common approaches that don't work:

  1. 70% fail

    CMake resolves relative paths from the build directory, not the source directory; leads to 'not found'.

  2. 85% fail

    Toolchain file must be set before the first project() command; otherwise CMake ignores it.