diff -up bash-4.0-rc1/error.h.no_debug_output bash-4.0-rc1/error.h
--- bash-4.0-rc1/error.h.no_debug_output	2009-01-08 14:32:45.000000000 +0100
+++ bash-4.0-rc1/error.h	2009-01-29 14:39:16.000000000 +0100
@@ -51,8 +51,10 @@ extern void internal_error __P((const ch
 extern void internal_warning __P((const char *, ...))  __attribute__((__format__ (printf, 1, 2)));
 
 /* Debugging functions, not enabled in released version. */
+#if defined (DEBUG)
 extern void itrace __P((const char *, ...)) __attribute__ ((__format__ (printf, 1, 2)));
 extern void trace __P((const char *, ...)) __attribute__ ((__format__ (printf, 1, 2)));
+#endif
 
 /* Report an error having to do with command parsing or execution. */
 extern void command_error __P((const char *, int, int, int));
diff -up bash-4.0-rc1/builtins/evalstring.c.no_debug_output bash-4.0-rc1/builtins/evalstring.c
--- bash-4.0-rc1/builtins/evalstring.c.no_debug_output	2009-01-04 20:32:22.000000000 +0100
+++ bash-4.0-rc1/builtins/evalstring.c	2009-01-29 14:39:16.000000000 +0100
@@ -268,7 +268,9 @@ parse_and_execute (string, from_file, fl
 	      if ((subshell_environment & SUBSHELL_COMSUB) && comsub_ignore_return)
 {
 		command->flags |= CMD_IGNORE_RETURN;
+#if defined (DEBUG)
 itrace("parse_and_execute: turned on CMD_IGNORE_RETURN from comsub_ignore_return");
+#endif
 }
 
 #if defined (ONESHOT)
diff -up bash-4.0-rc1/Makefile.in.no_debug_output bash-4.0-rc1/Makefile.in
--- bash-4.0-rc1/Makefile.in.no_debug_output	2009-01-29 14:40:11.000000000 +0100
+++ bash-4.0-rc1/Makefile.in	2009-01-29 14:40:54.000000000 +0100
@@ -112,7 +112,7 @@ VENDOR = @host_vendor@
 MACHTYPE = @host@
 
 # comment out for release
-DEBUG = @DEBUG@
+#DEBUG = @DEBUG@
 MALLOC_DEBUG = @MALLOC_DEBUG@
 
 THIS_SH = $(BUILD_DIR)/$(Program)