s390.c (optimization_options): Set flag_asynchronous_unwind_tables to 1 by default.

	* config/s390/s390.c (optimization_options): Set
	flag_asynchronous_unwind_tables to 1 by default.

From-SVN: r59135

gcc/ChangeLog

 2002-11-15  Ulrich Weigand  <uweigand@de.ibm.com>
 
+	* config/s390/s390.c (optimization_options): Set 
+	flag_asynchronous_unwind_tables to 1 by default.
+
+2002-11-15  Ulrich Weigand  <uweigand@de.ibm.com>
+
 	* config/s390/s390.h (ASM_PREFERRED_EH_DATA_FORMAT): Define.
 
 Fri Nov 15 14:54:19 CET 2002  Jan Hubicka  <jh@suse.cz>

gcc/config/s390/s390.c

@@ -816,6 +816,10 @@ optimization_options (level, size)
 {
   /* ??? There are apparently still problems with -fcaller-saves.  */
   flag_caller_saves = 0;
+
+  /* By default, always emit DWARF-2 unwind info.  This allows debugging
+     without maintaining a stack frame back-chain.  */
+  flag_asynchronous_unwind_tables = 1;
 }
 
 void