SDL_ttf
TTF_Linked_Version
const SDL_version *TTF_Linked_Version() void TTF_VERSION(SDL_version *compile_version)
This works similar to SDL_Linked_Version and SDL_VERSION. Using these you can compare the runtime version to the version that you compiled with.
SDL_version compile_version, *link_version;
TTF_VERSION(&compile_version);
printf("compiled with SDL_ttf version: %d.%d.%d\n",
compile_version.major,
compile_version.minor,
compile_version.patch);
link_version=TTF_Linked_Version();
printf("running with SDL_ttf version: %d.%d.%d\n",
link_version->major,
link_version->minor,
link_version->patch);
