3373 gcc >= 4.5 concerns about offsetof()

*** 55,65 ****
  #endif
  
  static int sf_bus_config_debug = 0;
  
  /* Why do I have to do this? */
! #define offsetof(s, m)  (size_t)(&(((s *)0)->m))
  
  #include <sys/scsi/scsi.h>
  #include <sys/fc4/fcal.h>
  #include <sys/fc4/fcp.h>
  #include <sys/fc4/fcal_linkapp.h>
--- 55,69 ----
  #endif
  
  static int sf_bus_config_debug = 0;
  
  /* Why do I have to do this? */
! #if defined(__GNUC__)
! #define offsetof(s, m)  __builtin_offsetof(s, m)
! #else
! #define offsetof(s, m)  ((size_t)(&(((s *)0)->m)))
! #endif
  
  #include <sys/scsi/scsi.h>
  #include <sys/fc4/fcal.h>
  #include <sys/fc4/fcp.h>
  #include <sys/fc4/fcal_linkapp.h>