bug#34589: 26.1.91; GDB-MI Display Complex Data Types

[Eli Zaretskii]

> From: Gustaf Waldemarson <gustaf.waldemarson@gmail.com>
> Date: Wed, 20 Feb 2019 11:08:15 +0100
> 
> Since as C++ (and other languages) is moving more and more towards these
> kinds non-simple data types, I figured I should send out a feature
> request for something like the following:
> 
> - Remove "--simple-values" by default.
> 
> - Add a customizable variable such as `gdb-simple-values-only`, which
>   adds the above flag.
> 
> - Add a customizable variable such as `gdb-locals-value-limit` to limit
>   the length a value is allowed to be shown.
> 
> - Add a simple filter of the retrieved value string to make it fit on a
>   single line (e.g., a simple version could just remove all newlines).

Thanks.  We don't have an active developer for gdb-mi.el for the
moment, so please consider writing these changes and submitting the
patches here.