[PATCH] gnu: Add mednafen.

+++ b/gnu/packages/emulators.scm

+(define-public mednafen

+  (package

+    (name "mednafen")

+    (version "1.24.3")

+    (source

+     (origin

+       (method url-fetch)

+       (uri (string-append "https://mednafen.github.io/releases/files/"

+                           "mednafen-" version ".tar.xz"))

+       (sha256

+        (base32 "03zplcfvmnnv7grhacmr1zy789pb2wda36wylmzmar23g0zqbsix"))))

+    (build-system gnu-build-system)

+    (arguments

+     `(#:configure-flags

+       (list

+        ;; "--with-external-mpcdec"

+        "--with-external-lzo")))

+    (native-inputs

+     `(("pkg-config" ,pkg-config)))

+    (inputs

+     `(("alsa" ,alsa-lib)

+       ;; ("libmpcdec" ,libmpcdec) FIXME: not recognized.

+       ("libsndfile" ,libsndfile)

+       ("lzo" ,lzo)

+       ("sdl2" ,sdl2)

+       ("zlib" ,zlib)))

+    (home-page "https://mednafen.github.io/")

+    (synopsis "Multi-system emulator utilizing OpenGL and SDL")

+    (description

+     "Mednafen is a portable, utilizing OpenGL and SDL, argument-driven

+multi-system emulator.  Mednafen has the ability to remap hotkey functions and

+virtual system inputs to a keyboard, a joystick, or both simultaneously.  Save

+states are supported, as is real-time game rewinding.  Screen snapshots may be

+taken, in the PNG file format, at the press of a button.  Mednafen can record

+audiovisual movies in the QuickTime file format, with several different

+lossless codecs supported.

+

+The following systems are supported:

+

+@itemize

+@item Apple II/II+

+@item Atari Lynx

+@item Neo Geo Pocket (Color)

+@item WonderSwan

+@item GameBoy (Color)

+@item GameBoy Advance

+@item Nintendo Entertainment System

+@item Super Nintendo Entertainment System/Super Famicom

+@item Virtual Boy

+@item PC Engine/TurboGrafx 16 (CD)

+@item SuperGrafx

+@item PC-FX

+@item Sega Game Gear

+@item Sega Genesis/Megadrive

+@item Sega Master System

+@item Sega Saturn (experimental, x86_64 only)

+@item Sony PlayStation

+@end itemize")

+    ;; Main license is GPL2+.  Some parts are BSD-3.

+    (license (list license:gpl2+ license:bsd-3))))

+