builtin-noret-1.c (_exit, _Exit): Make weak.

	* gcc.dg/torture/builtin-noret-1.c (_exit, _Exit): Make weak.
	* gcc.dg/torture/builtin-noret-2.c (_exit, _Exit): Likewise.

From-SVN: r67387

gcc/testsuite/gcc.dg/torture/builtin-noret-1.c

@@ -15,6 +15,11 @@ extern void t_Exit (void);
 
 extern void link_failure (void);
 
+/* Some libcs have _exit and/or _Exit, and won't allow it to be re-defined,
+   so make it weak.  */
+#pragma weak _exit
+#pragma weak _Exit
+
 int
 main (void)
 {

gcc/testsuite/gcc.dg/torture/builtin-noret-2.c

@@ -46,11 +46,17 @@ void
 t_exit (void)
 {
   extern void _exit (int);
+  /* Some non-Unix libcs have _exit, and won't allow it to be re-defined,
+     so make it weak.  */
+#pragma weak _exit
   _exit (1);
   link_failure ();
 }
 
 /* Some non-Unix libcs might not have _exit.  */
+/* Some non-Unix libcs have _exit, and won't allow it to be re-defined,
+   so make it weak.  */
+#pragma weak _exit
 void
 _exit (int i)
 {
@@ -61,11 +67,17 @@ void
 t_Exit (void)
 {
   extern void _Exit (int);
+  /* Some libcs have _Exit, and won't allow it to be re-defined,
+     so make it weak.  */
+#pragma weak _Exit
   _Exit (1);
   link_failure ();
 }
 
 /* Some libcs might not have _Exit.  */
+/* Some libcs have _Exit, and won't allow it to be re-defined,
+   so make it weak.  */
+#pragma weak _Exit
 void
 _Exit (int i)
 {