This folder/directory contains binary libraries for SDL2 and GLEW for various platforms and situations.
The SDL and Glew directories without the "-EGL" label allow for static builds with Microsoft Visual Studio (MSVC).
The Glew directory with the "-EGL" exenstion is an OpenGL-EGL build of Glew needed to support the SDL_SetHint(SDL_HINT_VIDEODRIVER, "wayland") call to support wayland true fractional scaling on Linux (to use "Wayland" versus "XWayland").