libsdl-ocaml-dev 0.9.1-3build1 (armhf binary) in ubuntu focal

 SDL (Simple DirectMedia Layer) is a generic API that provides low
 level access to audio, keyboard, mouse, and display framebuffer
 across multiple platforms.
 OCamlSDL is an OCaml interface to SDL that might be used to write
 multimedia applications in Objective Caml.
 .
 This package contains development files for OCamlSDL application
 writers.