system is unknown to cmake

Usage
1

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

2

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

3

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

Best,
Chih