Gunnar Evermann <ge204(a)eng.cam.ac.uk&gt; writes: Something is eating the SIGCHLD's. Back then it seemed related to tooltalk+gcc (disabling tooltalk/workshop support has always solved it for me). However since I switched to 'cc' the problem also went away. That it also occurs with cc is new to me. In my case the problem was that the XEmacs signal handler was never called. If you run under gdb you see that the signal is being delivered. So I guess something is installing its own signal handler and/or messing with the signal masks. Jan