I have downloaded agui from github recently and went through Cmake process:

1. Set agui root directory as source
2. Set "build" directory as target
3. Click "configure"
4. Check if backend is set to Allegro
5. Click "generate"

I’ve opened the .sln file, selected the "ALLBUILD" project and run it. I got the following compilation error a few times (but with different files)

AllegroFont.cpp: cannot open "AllegroFont.hpp", file not found

So while the code files exist, the header files are not there.

My suggestions so far:

• I use Allegro through NuGet. Might this be a case?

Source: Windows Questions C++