Add hot reload support when building with GCC and CMake

Author: ytnuf

CMakeLists.txt

@@ -126,6 +126,9 @@ endif()
 
 if (GODOT_ENABLE_HOT_RELOAD)
  set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -D HOT_RELOAD_ENABLED")
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -fno-gnu-unique")
+endif()
 endif()
 
 # Generate source from the bindings file