bug#21777: 25.0.50; gud-gdb uses a pager, which is harmful inside emacs

[Eli Zaretskii <eliz@gnu.org>]

> Date: Fri, 30 Oct 2015 11:32:47 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 21777@debbugs.gnu.org, schwab@linux-m68k.org
> 
> > - we have a variable 'gud-gdb-set-height-unlimited',
> >   which has 3 states: uninitialized, yes, no
> > 
> > - when gud starts up, if it's 'uninitialized', we ask the user if they
> >   want to override, and whether to do so in the future; if they say yes,
> >   we update their .emacs.d/init.el. narrow-to-region has this type of
> >   user querying. We override only if it's 'yes'
> 
> Why not a simpler boolean, off by default?  This problem will go away
> soon enough, so maybe solutions that are too complicated would be
> over-engineering it?

I think if we have such an option, and it's by default off, we might
consider not bothering about gdbinit commands that contradict the
effect of that option.  The option gives users enough power to decide
what they want more.

WDYT?