fix SIGCHLD handling

From-SVN: r40330

gcc/ChangeLog

+2001-03-08  Bruce Korb  <bkorb@gnu.org>
+
+	gcc.c(main): ensure SIGCHLD handling is set to SIG_DFL so that
+	wiat4() can receive the signal.
+
 Thu Mar  8 21:09:10 2001  Rainer Orth  <ro@TechFak.Uni-Bielefeld.DE>
 
 	* fixinc/inclhack.def (AAB_dgux_int_varargs): Don't use HTML

gcc/gcc.c

@@ -5517,6 +5517,9 @@ main (argc, argv)
   if (signal (SIGPIPE, SIG_IGN) != SIG_IGN)
     signal (SIGPIPE, fatal_error);
 #endif
+  /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will
+     receive the signal.  A different setting is inheritable */
+  signal (SIGCHLD, SIG_DFL);
 
   argbuf_length = 10;
   argbuf = (const char **) xmalloc (argbuf_length * sizeof (const char *));