diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5157ca2..53513df 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -80,12 +80,18 @@ endforeach()
 
 
 
-# Optimizations
-set_property(TARGET Pound PROPERTY CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE TRUE)
-if (WIN32)
-    target_compile_options(Pound PRIVATE $<$<CONFIG:Release>:/Oi>)
-    target_compile_options(Pound PRIVATE  $<$<CONFIG:Release>:/Ot>)
-endif()
+# --------------------------------
+# ---- Optimizations / Flags -----
+# --------------------------------
+
+# (optional) LTO/IPO in Release, nur wenn unterstützt
+set_property(TARGET Pound PROPERTY INTERPROCEDURAL_OPTIMIZATION_RELEASE TRUE)
+
+# MSVC-spezifische Flags NUR bei MSVC setzen (nicht bei MinGW/GCC)
+target_compile_options(Pound PRIVATE
+    $<$<AND:$<CXX_COMPILER_ID:MSVC>,$<CONFIG:Release>>:/Oi /Ot>
+)
+
 
 target_link_libraries(Pound PRIVATE
     common
diff --git a/src/main.cpp b/src/main.cpp
index d661f72..6c1d717 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -18,7 +18,7 @@
 
 int main()
 {
-#if 0
+#if 1
     gui::window_t window = {.data = nullptr, .gl_context = nullptr};
     (void)gui::window_init(&window, "Pound Emulator", 640, 480);
 
@@ -103,11 +103,8 @@ int main()
         ::glClear(GL_COLOR_BUFFER_BIT);
 
         ::ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
-        if (bool sdl_ret_code = ::SDL_GL_SwapWindow(gui.window.data); false == sdl_ret_code)
-        {
-            LOG_ERROR("Failed to update window with OpenGL rendering: {}", SDL_GetError());
-            is_running = false;
-        }
+        ::SDL_GL_SwapWindow(gui.window.data);
+
 
         // Small delay to prevent excessive CPU usage
         std::this_thread::sleep_for(std::chrono::milliseconds(5));