--- a/gcc/genconstants.c	Sun Aug 21 07:07:55 2011 +0900
+++ b/gcc/genconstants.c	Fri Oct 27 22:46:09 2017 +0900
@@ -2,8 +2,7 @@
    a series of #define statements, one for each constant named in
    a (define_constants ...) pattern.
 
-   Copyright (C) 1987, 1991, 1995, 1998, 1999, 2000, 2001, 2003, 2004,
-   2007, 2010  Free Software Foundation, Inc.
+   Copyright (C) 1987-2017 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -29,6 +28,8 @@
 #include "system.h"
 #include "coretypes.h"
 #include "errors.h"
+#include "statistics.h"
+#include "vec.h"
 #include "read-md.h"
 
 /* Called via traverse_md_constants; emit a #define for
@@ -76,11 +77,12 @@
 }
 
 int
-main (int argc, char **argv)
+main (int argc, const char **argv)
 {
   progname = "genconstants";
 
-  if (!read_md_files (argc, argv, NULL, NULL))
+  noop_reader reader;
+  if (!reader.read_md_files (argc, argv, NULL))
     return (FATAL_EXIT_CODE);
 
   /* Initializing the MD reader has the side effect of loading up
@@ -91,8 +93,8 @@
   puts ("#ifndef GCC_INSN_CONSTANTS_H");
   puts ("#define GCC_INSN_CONSTANTS_H\n");
 
-  traverse_md_constants (print_md_constant, 0);
-  traverse_enum_types (print_enum_type, 0);
+  reader.traverse_md_constants (print_md_constant, 0);
+  reader.traverse_enum_types (print_enum_type, 0);
 
   puts ("\n#endif /* GCC_INSN_CONSTANTS_H */");