gdb: add "set startup-quietly" command

This adds a new command to change GDB to behave as though "-quiet"
were always given.  This new command can be added to the gdbearlyinit
file to affect future GDB sessions.

gdb/ChangeLog:

	* NEWS: Add entry.
	* main.c (captured_main_1): Call check_quiet_mode.
	* top.c (startup_quiet): New global.
	(check_quiet_mode): New function.
	(show_startup_quiet): New function.
	(init_main): Register new command.
	* top.h (check_quiet_mode): Declare.

gdb/doc/ChangeLog:

	* gdb.texinfo (Mode Options): Mention "set startup-quietly".

gdb/testsuite/ChangeLog:

	* gdb.base/startup-file.exp: Add more tests.

1 files changed, 33 insertions, 0 deletions

diff --git a/gdb/top.c b/gdb/top.c
index c374a8d..ecd90a1 100644
--- a/gdb/top.c
+++ b/gdb/top.c
@@ -2163,6 +2163,28 @@ set_history_filename (const char *args,
     }
 }
 
+/* Whether we're in quiet startup mode.  */
+
+static bool startup_quiet;
+
+/* See top.h.  */
+
+bool
+check_quiet_mode ()
+{
+  return startup_quiet;
+}
+
+/* Show whether GDB should start up in quiet mode.  */
+
+static void
+show_startup_quiet (struct ui_file *file, int from_tty,
+	      struct cmd_list_element *c, const char *value)
+{
+  fprintf_filtered (file, _("Whether to start up quietly is %s.\n"),
+		    value);
+}
+
 static void
 init_gdb_version_vars (void)
 {
@@ -2319,6 +2341,17 @@ input settings."),
 			show_interactive_mode,
 			&setlist, &showlist);
 
+  c = add_setshow_boolean_cmd ("startup-quietly", class_support,
+			       &startup_quiet, _("\
+Set whether GDB should start up quietly."), _("		\
+Show whether GDB should start up quietly."), _("\
+This setting will not affect the current session.  Instead this command\n\
+should be added to the .gdbearlyinit file in the users home directory to\n\
+affect future GDB sessions."),
+			       NULL,
+			       show_startup_quiet,
+			       &setlist, &showlist);
+
   c = add_cmd ("new-ui", class_support, new_ui_command, _("\
 Create a new UI.\n\
 Usage: new-ui INTERPRETER TTY\n\