3373 gcc >= 4.5 concerns about offsetof()
Portions contributed by: Igor Pashev <pashev.igor@gmail.com>

*** 78,92 ****
--- 78,96 ----
  
  #if __cplusplus >= 199711L
  }
  #endif /* end of namespace std */
  
+ #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+ #define offsetof(s, m) __builtin_offsetof(s, m)
+ #else
  #if __cplusplus >= 199711L
  #define offsetof(s, m)  (std::size_t)(&(((s *)0)->m))
  #else
  #define offsetof(s, m)  (size_t)(&(((s *)0)->m))
  #endif
+ #endif  /* GNUC, etc. */
  
  #ifdef  __cplusplus
  }
  #endif