SDL3

#define SDL_MAIN_USE_CALLBACKS 1  /* use the callbacks instead of main() */
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>

static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;

SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[]) {
    /* Create the window */
    if (!SDL_CreateWindowAndRenderer("Hello World", 800, 600, SDL_WINDOW_RESIZABLE, &window, &renderer)) {
        SDL_Log("Couldn't create window and renderer: %s", SDL_GetError());
        return SDL_APP_FAILURE;
    }

    if(!SDL_Init(SDL_INIT_VIDEO)){
        SDL_Log("Error initializing SDL : %s", SDL_GetError());
        return SDL_APP_FAILURE;
    }

    SDL_Log("App started");
    return SDL_APP_CONTINUE;
}

SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event){
    if (event->type == SDL_EVENT_QUIT) {
        return SDL_APP_SUCCESS;  /* end the program, reporting success to the OS. */
    }
    return SDL_APP_CONTINUE;
}

/* This function runs once at shutdown. */
void SDL_AppQuit(void *appstate, SDL_AppResult result)
{
    SDL_DestroyRenderer(renderer);
    renderer = NULL;
    SDL_DestroyWindow(window);
    window = NULL;
    SDL_QuitSubSystem(SDL_INIT_VIDEO);
}

void update(){
}

void render(){
    SDL_RenderClear(renderer);
    SDL_SetRenderDrawColor(renderer, 10, 10, 50, 255);

    SDL_RenderPresent(renderer);
}

/* This function runs once per frame, and is the heart of the program. */
SDL_AppResult SDL_AppIterate(void *appstate){
    update();
    render();
    return SDL_APP_CONTINUE;
}