Prerequisites

You'll need a few items in order for SDL support to function:

Debian

pkg-config

sudo apt-get install pkg-config

SDL libraries

sudo apt install libsdl2{,-image,-mixer,-ttf,-gfx}-dev'

ffmpeg

sudo apt-get install ffmpeg

MacOS

Install Homebrew
Now install SDL libraries

brew install sdl2{,_image,_mixer,_ttf,_gfx} pkg-config

ffmpeg

brew install ffmpeg