Remove MI version 1

MI version 1 is long since obsolete.  Several years ago, I filed
PR mi/23170 for this.  I think it's finally time to remove this.
Any users of MI 1 can and should upgrade to a newer version.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=23170

11 files changed, 11 insertions, 126 deletions

diff --git a/gdb/NEWS b/gdb/NEWS
index 3a3387c76c4..e61f06081de 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -3,6 +3,8 @@
 
 *** Changes since GDB 13
 
+* MI version 1 has been removed.
+
 *** Changes in GDB 13
 
 * MI version 1 is deprecated, and will be removed in GDB 14.
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 755fbf72a7c..bef63eb4e8e 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -29150,10 +29150,6 @@ The @sc{gdb/mi} interface introduced in @value{GDBN} 9.1.
 @cindex mi2 interpreter
 The @sc{gdb/mi} interface introduced in @value{GDBN} 6.0.
 
-@item mi1
-@cindex mi1 interpreter
-The @sc{gdb/mi} interface introduced in @value{GDBN} 5.1.
-
 @end table
 
 @cindex invoke another interpreter
diff --git a/gdb/interps.h b/gdb/interps.h
index cd5fb3521d8..3efcd800650 100644
--- a/gdb/interps.h
+++ b/gdb/interps.h
@@ -175,7 +175,6 @@ extern void interpreter_completer (struct cmd_list_element *ignore,
 
 /* well-known interpreters */
 #define INTERP_CONSOLE		"console"
-#define INTERP_MI1             "mi1"
 #define INTERP_MI2             "mi2"
 #define INTERP_MI3             "mi3"
 #define INTERP_MI4             "mi4"
diff --git a/gdb/main.c b/gdb/main.c
index 8d2666ecc95..08ae0696781 100644
--- a/gdb/main.c
+++ b/gdb/main.c
@@ -1124,31 +1124,11 @@ captured_main_1 (struct captured_main_args *context)
       exit (0);
     }
 
-  /* FIXME: cagney/2003-02-03: The big hack (part 1 of 2) that lets
-     GDB retain the old MI1 interpreter startup behavior.  Output the
-     copyright message before the interpreter is installed.  That way
-     it isn't encapsulated in MI output.  */
-  if (!quiet && interpreter_p == INTERP_MI1)
-    {
-      /* Print all the junk at the top, with trailing "..." if we are
-	 about to read a symbol file (possibly slowly).  */
-      print_gdb_version (gdb_stdout, true);
-      if (symarg)
-	gdb_printf ("..");
-      gdb_printf ("\n");
-      gdb_flush (gdb_stdout);	/* Force to screen during slow
-				   operations.  */
-    }
-
   /* Install the default UI.  All the interpreters should have had a
      look at things by now.  Initialize the default interpreter.  */
   set_top_level_interpreter (interpreter_p.c_str ());
 
-  /* FIXME: cagney/2003-02-03: The big hack (part 2 of 2) that lets
-     GDB retain the old MI1 interpreter startup behavior.  Output the
-     copyright message after the interpreter is installed when it is
-     any sane interpreter.  */
-  if (!quiet && !current_interp_named_p (INTERP_MI1))
+  if (!quiet)
     {
       /* Print all the junk at the top, with trailing "..." if we are
 	 about to read a symbol file (possibly slowly).  */
diff --git a/gdb/mi/mi-cmd-env.c b/gdb/mi/mi-cmd-env.c
index 0c75b8042ff..5b077979352 100644
--- a/gdb/mi/mi-cmd-env.c
+++ b/gdb/mi/mi-cmd-env.c
@@ -65,14 +65,6 @@ mi_cmd_env_pwd (const char *command, char **argv, int argc)
   if (argc > 0)
     error (_("-environment-pwd: No arguments allowed"));
 	  
-  if (mi_version (uiout) < 2)
-    {
-      env_execute_cli_command ("pwd", NULL);
-      return;
-    }
-     
-  /* Otherwise the mi level is 2 or higher.  */
-
   gdb::unique_xmalloc_ptr<char> cwd (getcwd (NULL, 0));
   if (cwd == NULL)
     error (_("-environment-pwd: error finding name of working directory: %s"),
@@ -126,14 +118,6 @@ mi_cmd_env_path (const char *command, char **argv, int argc)
 
   dont_repeat ();
 
-  if (mi_version (uiout) < 2)
-    {
-      for (i = argc - 1; i >= 0; --i)
-	env_execute_cli_command ("path", argv[i]);
-      return;
-    }
-
-  /* Otherwise the mi level is 2 or higher.  */
   while (1)
     {
       int opt = mi_getopt ("-environment-path", argc, argv, opts,
@@ -199,14 +183,6 @@ mi_cmd_env_dir (const char *command, char **argv, int argc)
 
   dont_repeat ();
 
-  if (mi_version (uiout) < 2)
-    {
-      for (i = argc - 1; i >= 0; --i)
-	env_execute_cli_command ("dir", argv[i]);
-      return;
-    }
-
-  /* Otherwise mi level is 2 or higher.  */
   while (1)
     {
       int opt = mi_getopt ("-environment-directory", argc, argv, opts,
diff --git a/gdb/mi/mi-cmd-var.c b/gdb/mi/mi-cmd-var.c
index 3db09cf7815..e05866657e3 100644
--- a/gdb/mi/mi-cmd-var.c
+++ b/gdb/mi/mi-cmd-var.c
@@ -390,15 +390,7 @@ mi_cmd_var_list_children (const char *command, char **argv, int argc)
 
   if (from < to)
     {
-      /* For historical reasons this might emit a list or a tuple, so
-	 we construct one or the other.  */
-      gdb::optional<ui_out_emit_tuple> tuple_emitter;
-      gdb::optional<ui_out_emit_list> list_emitter;
-
-      if (mi_version (uiout) == 1)
-	tuple_emitter.emplace (uiout, "children");
-      else
-	list_emitter.emplace (uiout, "children");
+      ui_out_emit_list list_emitter (uiout, "children");
       for (int ix = from; ix < to && ix < children.size (); ix++)
 	{
 	  ui_out_emit_tuple child_emitter (uiout, "child");
@@ -633,15 +625,7 @@ mi_cmd_var_update (const char *command, char **argv, int argc)
   else
     print_values = PRINT_NO_VALUES;
 
-  /* For historical reasons this might emit a list or a tuple, so we
-     construct one or the other.  */
-  gdb::optional<ui_out_emit_tuple> tuple_emitter;
-  gdb::optional<ui_out_emit_list> list_emitter;
-
-  if (mi_version (uiout) <= 1)
-    tuple_emitter.emplace (uiout, "changelist");
-  else
-    list_emitter.emplace (uiout, "changelist");
+  ui_out_emit_list list_emitter (uiout, "changelist");
 
   /* Check if the parameter is a "*", which means that we want to
      update all variables.  */
@@ -680,9 +664,7 @@ varobj_update_one (struct varobj *var, enum print_values print_values,
     {
       int from, to;
 
-      gdb::optional<ui_out_emit_tuple> tuple_emitter;
-      if (mi_version (uiout) > 1)
-	tuple_emitter.emplace (uiout, nullptr);
+      ui_out_emit_tuple tuple_emitter (uiout, nullptr);
       uiout->field_string ("name", varobj_get_objname (r.varobj));
 
       switch (r.status)
diff --git a/gdb/mi/mi-interp.c b/gdb/mi/mi-interp.c
index 3cc2462f672..cd6d1a803b4 100644
--- a/gdb/mi/mi-interp.c
+++ b/gdb/mi/mi-interp.c
@@ -1317,7 +1317,6 @@ void
 _initialize_mi_interp ()
 {
   /* The various interpreter levels.  */
-  interp_factory_register (INTERP_MI1, mi_interp_factory);
   interp_factory_register (INTERP_MI2, mi_interp_factory);
   interp_factory_register (INTERP_MI3, mi_interp_factory);
   interp_factory_register (INTERP_MI4, mi_interp_factory);
diff --git a/gdb/mi/mi-main.c b/gdb/mi/mi-main.c
index e5b003ec99b..1b9948c1f6d 100644
--- a/gdb/mi/mi-main.c
+++ b/gdb/mi/mi-main.c
@@ -1856,7 +1856,6 @@ captured_mi_execute_command (struct ui_out *uiout, struct mi_parse *context)
 
 	/* If we changed interpreters, DON'T print out anything.  */
 	if (current_interp_named_p (INTERP_MI)
-	    || current_interp_named_p (INTERP_MI1)
 	    || current_interp_named_p (INTERP_MI2)
 	    || current_interp_named_p (INTERP_MI3)
 	    || current_interp_named_p (INTERP_MI4))
diff --git a/gdb/mi/mi-out.c b/gdb/mi/mi-out.c
index 725c1c68546..b103aac206b 100644
--- a/gdb/mi/mi-out.c
+++ b/gdb/mi/mi-out.c
@@ -348,9 +348,6 @@ mi_out_new (const char *mi_version)
   if (streq (mi_version, INTERP_MI2))
     return new mi_ui_out (2);
 
-  if (streq (mi_version, INTERP_MI1))
-    return new mi_ui_out (1);
-
   return nullptr;
 }
 
diff --git a/gdb/testsuite/gdb.base/interp.exp b/gdb/testsuite/gdb.base/interp.exp
index a42d4ae60ae..a77dace2319 100644
--- a/gdb/testsuite/gdb.base/interp.exp
+++ b/gdb/testsuite/gdb.base/interp.exp
@@ -52,15 +52,6 @@ gdb_test_multiple "interpreter-exec mi \"-stack-info-frame\"" "" {
     }
 }
 
-gdb_test_multiple "interpreter-exec mi1 \"-break-insert main\"" "" {
-    -re ".done.bkpt=.number=.\[0-9\]\[^\n\]+\r\n$gdb_prompt " {
-	pass $gdb_test_name
-	gdb_expect 1 {
-	    -re "\r\n$gdb_prompt $" { }
-	}
-    }
-}
-
 gdb_test_multiple "interpreter-exec mi2 \"-break-insert main\"" "" {
     -re ".done.bkpt=.number=.\[0-9\]\[^\n\]+\r\n$gdb_prompt " {
 	pass $gdb_test_name
diff --git a/gdb/testsuite/lib/mi-support.exp b/gdb/testsuite/lib/mi-support.exp
index 573a9b91d1a..0249cb7e02e 100644
--- a/gdb/testsuite/lib/mi-support.exp
+++ b/gdb/testsuite/lib/mi-support.exp
@@ -264,27 +264,7 @@ proc default_mi_gdb_start { { flags {} } } {
 
     gdb_expect {
 	-re "~\"GNU.*\r\n~\".*$mi_gdb_prompt$" {
-	    # We have a new format mi startup prompt.  If we are
-	    # running mi1, then this is an error as we should be
-	    # using the old-style prompt.
-	    if { $MIFLAGS == "-i=mi1" } {
-		perror "(mi startup) Got unexpected new mi prompt."
-		remote_close host
-		unset gdb_spawn_id
-		return -1
-	    }
-	    verbose "GDB initialized."
-	}
-	-re "\[^~\].*$mi_gdb_prompt$" {
-	    # We have an old format mi startup prompt.  If we are
-	    # not running mi1, then this is an error as we should be
-	    # using the new-style prompt.
-	    if { $MIFLAGS != "-i=mi1" } {
-		perror "(mi startup) Got unexpected old mi prompt."
-		remote_close host
-		unset gdb_spawn_id
-		return -1
-	    }
+	    # We have a new format mi startup prompt.
 	    verbose "GDB initialized."
 	}
 	-re ".*unrecognized option.*for a complete list of options." {
@@ -399,27 +379,11 @@ proc mi_gdb_reinitialize_dir { subdir } {
 	return ""
     }
 
-    if { $MIFLAGS == "-i=mi1" } {
-      send_gdb "104-environment-directory\n"
-      gdb_expect 60 {
-	-re ".*Reinitialize source path to empty.*y or n. " {
-	    warning "Got confirmation prompt for dir reinitialization."
-	    send_gdb "y\n"
-	    gdb_expect 60 {
-		-re "$mi_gdb_prompt$" {}
-		timeout {error "Dir reinitialization failed (timeout)"}
-	    }
-	}
+    send_gdb "104-environment-directory -r\n"
+    gdb_expect 60 {
+	-re "104\\\^done,source-path=.*\r\n$mi_gdb_prompt$" {}
 	-re "$mi_gdb_prompt$" {}
-	  timeout {error "Dir reinitialization failed (timeout)"}
-      }
-    } else {
-	send_gdb "104-environment-directory -r\n"
-	gdb_expect 60 {
-	    -re "104\\\^done,source-path=.*\r\n$mi_gdb_prompt$" {}
-	    -re "$mi_gdb_prompt$" {}
-	    timeout {error "Dir reinitialization failed (timeout)"}
-      }
+	timeout {error "Dir reinitialization failed (timeout)"}
     }
 
     send_gdb "105-environment-directory $subdir\n"