cmake build_error ai_generated partial

CMake Error: check_cxx_source_compiles failed with: <compiler error output>

ID: cmake/check-cxx-source-compiles-failed

Also available as: JSON · Markdown · 中文
80%Fix Rate
83%Confidence
1Evidence
2023-04-18First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
CMake 3.10 active — — —
CMake 3.16 active — — —
CMake 3.22 active — — —
CMake 3.27 active — — —

Root Cause

A C++ source snippet provided to check_cxx_source_compiles() fails to compile, often due to missing headers, incorrect syntax, or incompatible compiler flags.

generic

中文

提供给 check_cxx_source_compiles() 的 C++ 源代码片段编译失败，通常是由于缺少头文件、语法错误或编译器标志不兼容。

Official Documentation

https://cmake.org/cmake/help/latest/module/CheckCXXSourceCompiles.html

Workarounds

  1. 85% success Inspect the compiler error output to identify missing headers or syntax issues, then fix the source snippet or add required include directories. 
    Inspect the compiler error output to identify missing headers or syntax issues, then fix the source snippet or add required include directories.
  2. 80% success Set CMAKE_REQUIRED_FLAGS or CMAKE_REQUIRED_LIBRARIES to match the project's compile environment. 
    Set CMAKE_REQUIRED_FLAGS or CMAKE_REQUIRED_LIBRARIES to match the project's compile environment.

中文步骤

  1. Inspect the compiler error output to identify missing headers or syntax issues, then fix the source snippet or add required include directories.
  2. Set CMAKE_REQUIRED_FLAGS or CMAKE_REQUIRED_LIBRARIES to match the project's compile environment.

Dead Ends

Common approaches that don't work:

  1. Adding -Werror or other flags globally to suppress warnings, hoping the snippet compiles 90% fail

    The error is usually a hard compile failure, not a warning. Adding flags may introduce more issues.

  2. Removing the check entirely, assuming the feature is available 85% fail

    The check is there for a reason; removing it may lead to runtime errors or build failures later.

  3. Copying the exact snippet into a standalone file and compiling it manually, then ignoring the CMake error 70% fail

    Even if it compiles manually, the CMake check may have different include paths or flags; manual success does not guarantee CMake success.