(main) [GC_MARK_STACK]: Initialize stack_base.

src/emacs.c

@@ -694,6 +694,9 @@ main (argc, argv, envp)
      char **argv;
      char **envp;
 {
+#ifdef GC_MARK_STACK
+  Lisp_Object dummy;
+#endif
   char stack_bottom_variable;
   int do_initial_setlocale;
   int skip_args = 0;
@@ -704,6 +707,11 @@ main (argc, argv, envp)
 #endif
   int no_loadup = 0;
 
+#ifdef GC_MARK_STACK
+  extern Lisp_Object *stack_base;
+  stack_base = &dummy;
+#endif
+
 #ifdef LINUX_SBRK_BUG
   __sbrk (1);
 #endif