Try to avoid malloc SEGVs on Cygwin.

* callproc.c, process.h (block_child_signal, unblock_child_signal):
Now extern.
* emacs.c (main): Catch SIGCHLD just before initializing gfilenotify.
* process.c (catch_child_signal): Block SIGCHLD while futzing with
the SIGCHLD handler, since the code is not atomic and (due to glib)
signals may be arriving now.
* sysdep.c (init_signals): Do not catch child signals here;
'main' now does that later, at a safer time.

Fixes: debbugs:14569

1 files changed, 0 insertions, 2 deletions

diff --git a/src/sysdep.c b/src/sysdep.c
index c2769865b5d..1d3e646d359 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -1901,8 +1901,6 @@ init_signals (bool dumping)
       sigaction (SIGFPE, &action, 0);
     }
 
-  catch_child_signal ();
-
 #ifdef SIGUSR1
   add_user_signal (SIGUSR1, "sigusr1");
 #endif