root_menu() can't return, tell gcc about it

Since it can't return, app_main() can't either, tell gcc about it.

Remove dead archos code (present if root_menu() would return
erroneously), and rename app_main() to main() on target

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23494 a1c6a512-1295-4272-9138-f99709370657

apps/main.c

@@ -127,7 +127,8 @@ static void init(void);
 #ifdef SIMULATOR
 void app_main(void)
 #else
-static void app_main(void)
+int main(void) __attribute__((noreturn));
+int main(void)
 #endif
 {
     int i;
@@ -640,17 +641,5 @@ void cop_main(void)
 }
 #endif /* CPU_PP */
 
-int main(void)
-{
-    app_main();
-
-    while(1) {
-#if (CONFIG_LED == LED_REAL)
-        led(true); sleep(HZ/10);
-        led(false); sleep(HZ/10);
-#endif
-    }
-    return 0;
-}
 #endif
 

apps/root_menu.c

@@ -595,5 +595,4 @@ void root_menu(void)
                 break;
         } /* switch() */
     }
-    return;
 }

apps/root_menu.h

@@ -22,7 +22,7 @@
 #ifndef __ROOT_MENU_H__
 #define __ROOT_MENU_H__
 
-void root_menu(void);
+void root_menu(void) __attribute__((noreturn));
 
 enum {
     /* from old menu api, but still required*/