RE: GUD GDB integration

["Juan Rafael García Blanco" <jrblanco@gmv.com>]

> -----Original Message-----
> From: help-gnu-emacs [mailto:help-gnu-emacs-
> bounces+jrblanco=gmv.com@gnu.org] On Behalf Of Eli Zaretskii
> Sent: Wednesday, May 23, 2018 5:46 PM
> To: help-gnu-emacs@gnu.org
> Subject: Re: GUD GDB integration
>
> > From: Juan Rafael García Blanco <jrblanco@gmv.com>
> > Date: Wed, 23 May 2018 08:23:04 +0000
> >
> > I wanted to know how gud and gdb interact, i.e. by parsing gdb's output or
> using gdb's built-in scripting engine. I have gone through gud.el and I
> understand interaction is accomplished by parsing gdb's output. Could you
> please confirm my understanding?
>
> There are 2 interfaces: the old one in gud.el uses the CLI output with
> annotations, the new one in gdb-mi.el uses the GDB/MI interface.
>
Thank you. I did not know about annotations.

> > If so, why is this approach better than writing event handlers using gdb's
> scheme interpreter?
>
> Not sure what you mean by that.  How would Emacs invoke the GDB's
> Guile interface?
>
Well, actually, gdb's guile/python interface would invoke Emacs back when
hitting a breakpoint, exception, ... I think it is a way to handle gdb events
synchronously, instead of reading and parsing gdb's output; but that would
require a connection from the guile part back to Emacs.

> > The context for this question is that I'm writing a gdb client, not for emacs,
> that somehow resembles what gud does. So I wanted to know what gud
> does because it is widely used and it is known to work.
>
> You can look in gdb-mi.el to see the code which uses GDB/MI.
Thank you very much. I will look into that implementation. Thanks.

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