Init

.gitignore

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+build/
+out/
+

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.15)
+project(PortalGame)
+
+# Enable C++17
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# Add src directory
+add_executable(PortalGame src/main.cpp)
+
+# Platform-specific SDL2 handling
+if(EMSCRIPTEN)
+    # Emscripten provides SDL2 via its system libraries
+    message(STATUS "Target platform: WebAssembly (Emscripten)")
+    set(CMAKE_EXECUTABLE_SUFFIX ".html")  # Optional: build HTML page
+    target_link_options(PortalGame PRIVATE 
+        "-sUSE_SDL=2"
+        "-sASYNCIFY"
+        "--preload-file assets"
+    )
+else()
+    # Native platform
+    find_package(SDL2 REQUIRED)
+    target_include_directories(PortalGame PRIVATE ${SDL2_INCLUDE_DIRS})
+    target_link_libraries(PortalGame PRIVATE ${SDL2_LIBRARIES})
+endif()

src/main.cpp

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+#include <SDL.h>
+#include <iostream>
+
+int main(int argc, char* argv[]) {
+    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
+        std::cerr << "SDL_Init Error: " << SDL_GetError() << std::endl;
+        return 1;
+    }
+
+    SDL_Window* win = SDL_CreateWindow("Hello SDL2", 100, 100, 640, 480, SDL_WINDOW_SHOWN);
+    if (!win) {
+        std::cerr << "SDL_CreateWindow Error: " << SDL_GetError() << std::endl;
+        SDL_Quit();
+        return 1;
+    }
+
+    SDL_Delay(2000);
+    SDL_DestroyWindow(win);
+    SDL_Quit();
+    return 0;
+}