Some project structure fixes

CMakeLists.txt

@@ -1,9 +1,6 @@
 cmake_minimum_required(VERSION 3.18)
 project(GameEngine VERSION 0.1.0 LANGUAGES C CXX)
 
-set(CMAKE_CXX_STANDARD 23)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
 # --- Validate preset variables ---
 if(NOT DEFINED SDL_LINK_TYPE OR NOT SDL_LINK_TYPE MATCHES "^(static|dynamic)$")
     message(FATAL_ERROR "SDL_LINK_TYPE must be 'static' or 'dynamic'. Use a CMake preset.")
@@ -19,11 +16,14 @@ message(STATUS "Build config: PLATFORM=${PLATFORM}, SDL_LINK_TYPE=${SDL_LINK_TYP
 include(cmake/SDLSetup.cmake)
 #include(cmake/SDLMixerSetup.cmake)
 
-# --- Apply Linux dynamic RPATH globally so all targets can find shared libs
-# at runtime. SDL_LINUX_RPATH is appended to by each Setup module.
+# --- On Linux with dynamic linking, set an $ORIGIN-relative RPATH so the
+# binary can find shared libs next to itself without needing LD_LIBRARY_PATH.
+# SDL_LINUX_RPATH is still used at build time so the dev build works in-place.
 if(DEFINED SDL_LINUX_RPATH)
     message(STATUS "Setting CMAKE_BUILD_RPATH to: ${SDL_LINUX_RPATH}")
     set(CMAKE_BUILD_RPATH "${SDL_LINUX_RPATH}")
+    set(CMAKE_INSTALL_RPATH "$ORIGIN")
+    set(CMAKE_INSTALL_RPATH_USE_LINK_PATH OFF)
 endif()
 
 # --- Subdirectories ---