When I opened #1038025 asking for a port to SDL 2, I wasn't aware that
aranym has already supported SDL 2 since 2014 according to its changelog.
On closer inspection, the upstream default is SDL 2, so if libsdl2-dev
happens to be installed then aranym will already accidentally switch
from SDL 1.2 to SDL 2, even with the current unmodified Debian packaging.
I'm intending to make the -dev package for sdl12-compat depend on
libsdl2-dev as a workaround for legacy SDL-dependent packages that
don't declare their build-dependencies explicitly, so when sdl12-compat
takes over the libsdl1.2-dev binary package name, aranym is going to
end up using SDL 2 in practice unless you explicitly configure with
--disable-sdl2 (please do that if you are aware of reasons why the SDL
2 code paths are broken).
aranym seems to compile fine in that configuration. I don't know what
Atari ROMs or other software (if any) it might need, so I haven't
attempted to test the resulting binaries.
smcv