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+RetroArch is the reference frontend for the libretro API. Popular
+examples of implementations for this API includes videogame system
+emulators and game engines, but also more generalized 3D programs.
+These programs are instantiated as dynamic libraries. We refer to these
+as "libretro cores".
+
+libretro is an API that exposes generic audio/video/input callbacks. A
+frontend for libretro (such as RetroArch) handles video output, audio
+output, input and application lifecycle. A libretro core written in
+portable C or C++ can run seamlessly on many platforms with very
+little/no porting effort.
+
+While RetroArch is the reference frontend for libretro, several other
+projects have used the libretro interface to include support for
+emulators and/or game engines. libretro is completely open and free for
+anyone to use.
+
+RetroArch will require at least one of the libretro cores to play any games.
+
+To build debugging symbols for RetroArch use:
+  DEBUG=1 ./RetroArch.SlackBuild
+
+Some optional dependencies include:
+ffmpeg jack-audio-connection-kit libxkbcommon python3 SDL2 wayland
+
+Note: Wayland support requires mesa to be rebuilt with Wayland support,
+using the following configure parameters.
+
+  --with-egl-platforms=x11,drm,wayland
+
+RetroArch optionally supports using Vulkan instead of opengl, but
+Slackware does not yet provide any Vulkan support, so providing the
+correct build environment is up to you.