3373 gcc >= 4.5 concerns about offsetof()

*** 25,36 ****
   */
  
  #ifndef _MISC_H
  #define _MISC_H
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <sys/types.h>
  #include <sys/time.h>
  #include <thread.h>
  #include <pthread.h>
  #include <stdarg.h>
--- 25,34 ----
*** 48,58 ****
--- 46,60 ----
   * various utility functions
   * These are globally implemented.
   */
  
  #undef  offsetof
+ #if defined(__GNUC__)
+ #define offsetof(s, m)  __builtin_offsetof(s, m)
+ #else
  #define offsetof(s, m)  ((size_t)(&(((s *)0)->m)))
+ #endif
  
  /*
   * a safe printf  -- do not use for error messages.
   */
  void debug_printf(const char *format, ...);