--- gforth/engine/signals.c	2002/10/27 09:57:11	1.17
+++ gforth/engine/signals.c	2003/01/07 09:31:20	1.20
@@ -21,8 +21,8 @@
 */
 
 
-#define _GNU_SOURCE
-
+#include "config.h"
+#include "forth.h"
 #include <stdio.h>
 #include <setjmp.h>
 #include <string.h>
@@ -31,11 +31,14 @@
 #include <sys/ioctl.h>
 #endif
 /* #include <asm/signal.h> */
+#include <sys/types.h>
 #include <signal.h>
-#include "config.h"
-#include "forth.h"
 #include "io.h"
 
+#ifndef HAVE_STACK_T
+/* Darwin uses "struct sigaltstack" instead of "stack_t" */
+typedef struct sigaltstack stack_t;
+#endif
 
 #define DEFAULTCOLS 80
 #if defined(MSDOS) || defined (_WIN32)
@@ -77,7 +80,7 @@ Sigfunc *bsd_signal(int signo, Sigfunc *
 
   act.sa_handler=func;
   sigemptyset(&act.sa_mask);
-  act.sa_flags=SA_NODEFER|SA_ONSTACK;
+  act.sa_flags=SA_NODEFER; /* SA_ONSTACK does not work for graceful_exit */
   if (sigaction(signo,&act,&oact) < 0)
     return SIG_ERR;
   else