By the way, the *gud* buffer's first line is

> Current directory is ~/

However, the Emacs source code is in ~/emacs. Maybe this is the problem?
But I started Emacs from ~/emacs. How can I set the *gud* buffer's current
directory?

On Fri, Aug 11, 2017 at 12:55 PM, Itai Berli <itai.berli@gmail.com> wrote:

> Typing "b main<RET>" in the *gud* buffer results in the following error
> message:
>
> > Current buffer has no process
>
> On Fri, Aug 11, 2017 at 12:52 PM, Eli Zaretskii <eliz@gnu.org> wrote:
>
>> > From: Itai Berli <itai.berli@gmail.com>
>> > Date: Fri, 11 Aug 2017 12:27:01 +0300
>> > Cc: Emacs developers <emacs-devel@gnu.org>
>> >
>> > Paul Eggert wrote:
>> >
>> > > type the GDB command "b Fexpand_file_name" to plant a breakpoint in
>> (say) Fexpand_file_name
>> >
>> > What do you mean by 'Fexpand_file_name'? The name of a file, or the
>> name of a function?
>>
>> It's the name of a function.
>>
>> > Could you give me
>> > a concrete example? Suppose, for instance, I wish to place a breakpoint
>> at the start of the 'main; function. How
>> > can I do so?
>>
>> "b main".  "b" is a short for "break".
>>
>
>