GDB ReRun/Switch Behaviour

[Nordlöw]

I would like the command gdb on program X to instead switch to an existing 
debugging session of X if it already exists instead of signalling an error 
"This program is already being debugged" in gud-common-init. I believe this is 
important as it makes the behaviour of gdb harmonize with the standard 
behaviour of most other Emacs interactions such as, find-file, switch-to-buffer 
etc, thus creating less confusion to the user.

So far I have modified the line containing

(error "This program is already being debugged"))

to instead do

(message "This program is already being debugged")

to at least prevent the error from arising. However, the function gdb does some 
extra initializations that should not be needed that causes some unnecessary 
delays. Is this a todo item or have I missed some gud/gdb-function that does 
this already?


Many thanks in advance,
Per Nordlöw