+dnl
+dnl Handle --enable-kerberos
+dnl
+AC_ARG_ENABLE([kerberos],
+[ --enable-kerberos compile kerberos extensions],
+if test "$enableval" = "yes"
+then
+ OPTDEFS="-DKERBEROS"
+else
+ OPTDEFS=""
+fi
+,
+OPTDEFS=""
+echo "Not compiling kerberos extensions by default"
+)
+AC_SUBST(OPTDEFS)
+