I wonder if someone could create a simple Test app that they could make two versions of for Haiku. One that specifically uses SDL 1.x exclusively and the other uses SDL 2.x exclusively.
Unless there is a way to change a given app like Hatari to specifically use SDL 1.x vs. SDL 2.x.
UPDATE! Found it? A simple application with SDL (1.2 and 2), to check whether it is working or not. · GitHub
Or this?: A SDL2 C++ test app · GitHub