gdb/

* go32-nat.c: Declare _initialize_go32_nat.
	* ser-go32.c: Declare _initialize_ser_dos.
	* top.c (do_chdir_cleanup): Add 'static'.

gdb/go32-nat.c

@@ -2097,6 +2097,9 @@ go32_info_dos_command (char *args, int from_tty)
   help_list (info_dos_cmdlist, "info dos ", class_info, gdb_stdout);
 }
 
+/* -Wmissing-prototypes */
+extern initialize_file_ftype _initialize_go32_nat;
+
 void
 _initialize_go32_nat (void)
 {