system is unknown to cmake

Platform/MINGW64_NT-10.0-19045 to use this system, please post your config file on so it can be added to cmake.

Do you have a config file? How did you set a project up that encountered this?

Thank you for reaching out. I only have the cmake file, no file.
After I corrected some statements in the code, it compiled without problems.
Still, thank you for your help.