* abort.cc (abort): Set incyg manually to help get a reliable gdb stack trace.

* cygwin.din (abort): Make NOSIGFE.

winsup/cygwin/signal.cc

@@ -25,6 +25,7 @@ details. */
 #include "fhandler.h"
 #include "dtable.h"
 #include "cygheap.h"
+#include "cygtls.h"
 
 int sigcatchers;	/* FIXME: Not thread safe. */
 
@@ -343,7 +344,9 @@ abort (void)
   sigdelset (&sig_mask, SIGABRT);
   set_signal_mask (sig_mask, myself->getsigmask ());
 
+  _my_tls.incyg++;
   raise (SIGABRT);
+  _my_tls.incyg--;
   _my_tls.call_signal_handler (); /* Call any signal handler */
   do_exit (SIGABRT);	/* signal handler didn't exit.  Goodbye. */
 }