Re: [5.3 PATCH]: Fix TUI breaking gdb interpreters (mi)

[Andrew Cagney <ac131313@redhat.com>]

> Hi!
> 
> Daniel Jacobowitz wrote:
>> Two problems:
>>  TUI broke the MI interface if TUI is enabled at compile time.  The change
>> which did this does was on Sept. 10th, 2002.  There's a typo in the
>> ChangeLog which made it hard to find...
>>
>>        * tui-hooks.c (tui_event_loop): New function.
>>        (tui_command_loop): New function to override gdb loop and make sure
>>        uiout is set according to TUI mode.
>>        (tui_command_loop): Install the specific TUI command hook.
>>
>> (the second tui_command_loop should have been tui_init_hook).
>>
>> You can't just override the command loop that way!  MI does this
>> conditionally on -i=mi being specified.
>>
>> This also breaks the bit at the end of gdb/top.c to handle unknown -i=
>> switches.
> 
> Too bad...

For the mainline, the thing to do is probably mimic insight:

- if the tui sees interpreter_p == "tui" then set things up for the tui. 
  That way -i=tui works.

- have the --tui option set interpreter_p to "tui".

- create an executable called tui, linked with tui.c (instead of gdb.c) 
that sets the interpreter to tui (see insight's insight.c) before 
calling the wrapped main.  That way, the program `tui` will start the 
tui but `gdb` will still start GDB.

Andrew


> I've committed this patch to avoid the TUI initialization when some interpreter
> was specified (It does not make sense to enable TUI when there such interpreter).
> I also fixed the ChangeLog typo.
> 
> gdb -i=mi seems to work after that (at least better than without it).
> 
>     Stephane
> 
> 2002-11-21  Stephane Carrez  <stcarrez@nerim.fr>
> 
>     * tui-hooks.c (tui_init_hook): Don't enable the TUI if a specific
>     interpreter is installed.
> 
> 
> 
> Index: tui-hooks.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/tui/tui-hooks.c,v
> retrieving revision 1.7.2.1
> diff -u -p -r1.7.2.1 tui-hooks.c
> --- tui-hooks.c	10 Sep 2002 20:00:55 -0000	1.7.2.1
> +++ tui-hooks.c	21 Nov 2002 21:13:02 -0000
> @@ -420,6 +420,10 @@ tui_event_loop (void)
>  static void
>  tui_init_hook (char *argv0)
>  {
> +  /* Don't enable the TUI if a specific interpreter is installed.  */
> +  if (interpreter_p)
> +    return;
> +
>    /* Install exit handler to leave the screen in a good shape.  */
>    atexit (tui_exit);
>