Re: Problems with emacs built against gtk3

[Ken Brown <kbrown@cornell.edu>]

On 11/29/2011 10:51 PM, Yaakov (Cygwin/X) wrote:
> On Sat, 2011-11-26 at 08:40 -0500, Ken Brown wrote:
>> On 11/25/2011 7:38 PM, Ken Brown wrote:
>>> When I build emacs against gtk3, it is unusable. Here are the symptoms
>>> when the resulting emacs is started in an xterm window:
>>>
>>> $ ./emacs -Q&
>>> [1] 3344
>>>
>>> (emacs:3344): GLib-WARNING **: In call to g_spawn_sync(), exit status of
>>> a child process was requested but SIGCHLD action was set to SIG_IGN and
>>> ECHILD was received by waitpid(), so exit status can't be returned. This
>>> is a bug in the program calling g_spawn_sync(); either don't request the
>>> exit status, or don't set the SIGCHLD action.
>>>
>>> ** (emacs:3344): WARNING **: Abnormal program termination spawning
>>> command line `dbus-launch --autolaunch=0b8f184fe6d82872ee8db8724ecfdb90
>>> --binary-syntax --close-stderr':
>>>
>>> I think the pango warning is Cygwin specific, but the rest of it might
>>> not be. Similar symptoms were reported on Fedora:
>>>
>>> https://bugzilla.redhat.com/show_bug.cgi?id=654027
>
> This appears to be the same bug.  The solution is to launch a DBus
> session bus *before* starting emacs (or any other gtk3 programs for that
> matter), IOW:
>
> $ eval `dbus-launch --sh-syntax`
> $ emacs-X11&

That gets rid of the warning, but emacs still dies after a few seconds 
(no error message, no stackdump), unless I uninstall dconf-service. I'll 
see if I can get more information by running emacs under gdb.  I'd 
appreciate any suggestions you might have as to where I should look.

I forgot to say in my first post that the emacs I'm testing is a pretest 
of the upcoming emacs-24.1.  If I'm not able to figure out what's going 
on, maybe I'll make an experimental version available so that you can 
try to reproduce the problem.

Ken

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