> But do we have any control on whether gdb-display-source-buffer will
> find a source window where we want it to?  I'm not sure.

I don’t quite understand. gdb-display-source-buffer finds source window when there is one. What do you mean by “control” and “where we want it to”?

>> It shouldn't harm to try that.  I'd still make it optional - maybe
>> someone wants to see the other buffers.
> 
> I tend to agree with the last bit.

At the very least I want to fix the inconsistency in gdb-mi — goto-breakpoint uses `(or gdb-display-source-buffer display-buffer)` and gud-display-line uses `display-buffer`. We can modify the display logic to allow user customization once gdb-mi is consistent within itself.

Yuan