--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/get_spark_xrefs.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,60 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                       G E T _ S P A R K _ X R E F S                      --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2011-2013, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT 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  distributed with GNAT; see file COPYING3.  If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license.          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package contains the function used to read SPARK cross-reference
+--  information from an ALI file and populate the tables defined in package
+--  SPARK_Xrefs with the result.
+
+generic
+   --  These subprograms provide access to the ALI file. Locating, opening and
+   --  providing access to the ALI file is the callers' responsibility.
+
+   with function Getc return Character is <>;
+   --  Get next character, positioning the ALI file ready to read the following
+   --  character (equivalent to calling Nextc, then Skipc). If the end of file
+   --  is encountered, the value Types.EOF is returned.
+
+   with function Nextc return Character is <>;
+   --  Look at the next character, and return it, leaving the position of the
+   --  file unchanged, so that a subsequent call to Getc or Nextc will return
+   --  this same character. If the file is positioned at the end of file, then
+   --  Types.EOF is returned.
+
+   with procedure Skipc is <>;
+   --  Skip past the current character (which typically was read with Nextc),
+   --  and position to the next character, which will be returned by the next
+   --  call to Getc or Nextc.
+
+procedure Get_SPARK_Xrefs;
+--  Load SPARK cross-reference information from ALI file text format into
+--  internal SPARK tables (SPARK_Xrefs.SPARK_Xref_Table,
+--  SPARK_Xrefs.SPARK_Scope_Table and SPARK_Xrefs.SPARK_File_Table). On entry
+--  the input file is positioned to the initial 'F' of the first SPARK specific
+--  line in the ALI file. On return, the file is positioned either to the end
+--  of file, or to the first character of the line following the SPARK specific
+--  information (which will never start with an 'F').
+--
+--  If a format error is detected in the input, then an exception is raised
+--  (Ada.IO_Exceptions.Data_Error), with the file positioned to the error.