all variants (windows/linux)(static/dynamic) now work

CMakeLists.txt

@@ -18,6 +18,13 @@ message(STATUS "Build config: PLATFORM=${PLATFORM}, SDL_LINK_TYPE=${SDL_LINK_TYP
 # --- Resolve SDL ---
 include(cmake/SDLSetup.cmake)
 
+# --- Apply Linux dynamic RPATH globally so all targets can find libSDL3.so.0
+# at runtime. SDL_LINUX_RPATH is set by SDLSetup.cmake only on Linux + dynamic.
+if(DEFINED SDL_LINUX_RPATH)
+    message(STATUS "Setting CMAKE_BUILD_RPATH to: ${SDL_LINUX_RPATH}")
+    set(CMAKE_BUILD_RPATH "${SDL_LINUX_RPATH}")
+endif()
+
 # --- Subdirectories ---
 add_subdirectory(engine)
 add_subdirectory(game)