Could You Please Enhance demo5's Flexibility by Adding CMakeLists.txt?

[liusheng2020]

Thank you for your wonderful work! I have successfully set up debugging for rtklib-demo5 in VS2022 by opening the rtklib-demo5/app/consapp/XXX/msc/msc.sln file.

However, I am unsure how to debug it using the existing makefile. Additionally, I noticed that the current rtklib-demo5/app/consapp/XXX/gcc/makefile is designed for Ubuntu (Linux) and is not directly applicable to Windows.

CMake can lower the learning curve and simplify the compilation and usage of RTKLIB (demo5), especially for beginners. Could you please add a CMakeLists.txt file so that we can more easily debug consapp on both Ubuntu (Linux) and Windows? With CMakeLists.txt, it would be possible to automatically generate the appropriate makefile for different platforms, increasing the flexibility of the project.

I previously forked a CMake version of demo5 that works well (I have successfully tested it on Ubuntu using VSCode), but the author is no longer actively maintaining it, and more importantly, its folder structure is not synchronized with the latest demo5, so it cannot be directly used in this repository. Here is the project link for your reference: https://github.com/liusheng2020/demo5-cmake

Thank you!

[JensReimann]

Please have a look at the latest commit "Initial support for CMake". It is optional, only preliminary and not yet tested with Visual Studio (but the Visual C compiler).
Feedback is welcome.