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How to fix this error : searching for unused variables given on the command line. -- The C compiler identification is unknown CMake Error at CMakeLists.txt:3 (ENABLE_LANGUAGE): No CMAKE_C_COMPILER could be found. Tell CMake w

Jude Oyedele 0 Reputation points
2023-06-29T14:08:34.6933333+00:00

I have Visual Studio 2022 installed and I have set environmental variables for C compiler but I still get the error ;
How do I locate the CMakeLists.txt file to amend line 3 as thats where the error is coming from?

 searching for unused variables given on the command line.
      -- The C compiler identification is unknown
      CMake Error at CMakeLists.txt:3 (ENABLE_LANGUAGE):
        No CMAKE_C_COMPILER could be found.

        Tell CMake where to find the compiler by setting either the environment
        variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to
        the compiler, or to the compiler name if it is in the PATH.
Developer technologies | Visual Studio | Other
Developer technologies | Visual Studio | Other

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  1. Jude Oyedele 0 Reputation points
    2023-06-30T10:05:44.4433333+00:00

    What later works was running the intended installation command, which is pip install langflow via the x64 Native tool Command Prompt for VScode.
    It successfully built the wheel for llama-cpp-python which was the initial cause of the error.

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  2. Tianyu Sun-MSFT 34,836 Reputation points Microsoft External Staff
    2023-06-30T09:58:26.6666667+00:00

    Hello @Jude Oyedele ,

    Welcome to Microsoft Q&A forum.

    Does installing a new Windows SDK work(VS Installer => Modify => Individual components => SDKs, libraries, and frameworks)?

    Besides, does this issue also appear on a newly created CMake project in Visual Studio? If it is reproducible, please share us the detailed steps to reproduce it and check further.

    Best Regards,

    Tianyu

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