This is the version number macro for the current SDL version.
Defined in SDL_version.h
#define SDL_COMPILEDVERSION \
SDL_VERSIONNUM(SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL)
In versions higher than 2.9.0, the minor version overflows into the thousands digit: for example, 2.23.0 is encoded as 4300. This macro will not be available in SDL 3.x.
Deprecated, use SDL_VERSION_ATLEAST or SDL_VERSION instead.