--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/c-family/c-indentation.h	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,54 @@
+/* Definitions for c-indentation.c.
+   Copyright (C) 2015-2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef GCC_C_INDENTATION_H
+#define GCC_C_INDENTATION_H
+
+/* Token information used by the -Wmisleading-indentation implementation.  */
+
+struct token_indent_info
+{
+  location_t location;
+  ENUM_BITFIELD (cpp_ttype) type : 8;
+  ENUM_BITFIELD (rid) keyword : 8;
+};
+
+/* Extract token information from TOKEN, which ought to either be a
+   cp_token * or a c_token *.  */
+
+template <typename T>
+inline token_indent_info
+get_token_indent_info (const T *token)
+{
+  token_indent_info info;
+  info.location = token->location;
+  info.type = token->type;
+  info.keyword = token->keyword;
+
+  return info;
+}
+
+extern void
+warn_for_misleading_indentation (const token_indent_info &guard_tinfo,
+				 const token_indent_info &body_tinfo,
+				 const token_indent_info &next_tinfo);
+extern const char *
+guard_tinfo_to_string (enum rid keyword);
+
+#endif  /* ! GCC_C_INDENTATION_H  */