process-connection-type nil & gdb (was Re: C-c C-c killing gdb on OS/X)

[Steven Tamm]

I noticed this bug a while ago in the carbon port, and it works 
correctly with both X11 and the terminal emacs.  It has to do with the 
(setq process-connection-type nil) problem.  With X & the terminal the 
subprocesses are allocated with a pty, while with carbon they are 
allocated with pipes.  So if you (setq process-connection-type t), gdb 
will work; and if you (setq process-connection-type nil) in X11 and the 
terminal, it will fail and will probably fail on other platforms as 
well.  The "real bug" is that process-connection-type needs to be nil 
for darwin due to a bug in the pty implementation.

I'm not that familiar with the process code, nor with ptys, so I have 
no idea what is going wrong.  Can someone else look and figure out what 
the problem with interrupting gdb with pipes is?

Thanks,
-Steven

On Thursday, November 20, 2003, at 05:43  PM, John Wiegley wrote:

> To any of the Mac developers:
>
> If I write a program that waits in a loop, and hit C-c C-c while in
> gdb under gud, gdb will terminate with:
>
>   C-c C-c
> Debugger finished
>
> But I do the same thing in the Terminal, it interrupts the program as
> I expect.
>
> Ideas?  I checked process.c, and it doesn't seem that anything is
> being done differently for darwin.
>
> John
>
>
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