bug#2277: 23.0.60; GUD tooltips don't work on OS X

[Charles A. Roelli]

They work fine for me on 25.2 / macOS 10.6, using the following
recipe:

M-x gdb RET
b Fsignal RET
run -q RET
C-g in the newly opened Emacs
M-x gud-tooltip-mode

Hover over error_symbol to get a tooltip displaying "error_symbol =
39408".  I'll close in a few days if there's no further discussion.

> From: Nick Roberts <nickrob@snap.net.nz>
> Content-Type: text/plain; charset=us-ascii
> Date: Wed, 11 Feb 2009 23:11:44 +1300
> 
> 
> On OS X, if you enable GUD tooltips, you can't display any variable values as
> tooltips in the source buffer.
> 
> Incidentally, FSF GDB now compiles on Darwin/OS X and I generally find this
> version works better in Emacs, e.g, no ^M line endings, breakpoint icons
> display.  However, even with this version, Emacs doesn't seem to display GUD
> tooltips
> 
> 
> -- 
> Nick                                           http://www.inet.net.nz/~nickrob
> 
> 
> 
>