This is a duplicate of bug#2309 which is not fixed on Solaris.
The problem is that configure searches for the _et_list symbol in libcom_err.so
This symbol does not exist!( As of Kerberos 1.4/1.4.1 on Solaris.)

The following patch to configure checks for error_message instead. Now samba
links properly with -lcom_err again. Can you verify and clean up this patch!?

hastur> diff -c configure configure~
*** configure   Tue Jun 14 00:00:00 2005
--- configure~  Mon Jun 13 23:24:22 2005
***************
*** 29502,29509 ****



!         echo "$as_me:$LINENO: checking for error_message in -lcom_err" >&5
! echo $ECHO_N "checking for error_message in -lcom_err... $ECHO_C" >&6
  if test "${ac_cv_lib_ext_com_err__et_list+set}" = set; then
    echo $ECHO_N "(cached) $ECHO_C" >&6
  else
--- 29502,29509 ----



!         echo "$as_me:$LINENO: checking for _et_list in -lcom_err" >&5
! echo $ECHO_N "checking for _et_list in -lcom_err... $ECHO_C" >&6
  if test "${ac_cv_lib_ext_com_err__et_list+set}" = set; then
    echo $ECHO_N "(cached) $ECHO_C" >&6
  else
***************
*** 29520,29530 ****
  #endif
  /* We use char because int might match the return type of a gcc2
     builtin and then its argument prototype would still apply.  */
! char error_message ();
  int
  main ()
  {
! error_message ();
    ;
    return 0;
  }
--- 29520,29530 ----
  #endif
  /* We use char because int might match the return type of a gcc2
     builtin and then its argument prototype would still apply.  */
! char _et_list ();
  int
  main ()
  {
! _et_list ();
    ;
    return 0;
  }