1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 2003-2004 Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 -- This utility application creates symbol files in a format that is
28 -- platform-dependent.
30 -- A symbol file is a text file that lists the symbols to be exported from
31 -- a shared library. The format of a symbol file depends on the platform;
32 -- it may be a simple enumeration of the symbol (one per line) or a more
33 -- elaborate format (on VMS, for example). A symbol file may be used as an
34 -- input to the platform linker when building a shared library.
36 -- This utility is not available on all platforms. It is currently supported
39 -- gnatsym takes as parameters:
40 -- - the name of the symbol file to create
41 -- - (optional) the policy to create the symbol file
42 -- - (optional) the name of the reference symbol file
43 -- - the names of one or more object files where the symbols are found
45 with GNAT.Command_Line; use GNAT.Command_Line;
46 with GNAT.OS_Lib; use GNAT.OS_Lib;
48 with Gnatvsn; use Gnatvsn;
49 with Osint; use Osint;
50 with Output; use Output;
52 with Symbols; use Symbols;
57 Empty_String : aliased String := "";
58 Empty : constant String_Access := Empty_String'Unchecked_Access;
59 -- To initialize variables Reference and Version_String
61 Copyright_Displayed : Boolean := False;
62 -- A flag to prevent multiple display of the Copyright notice
64 Success : Boolean := True;
66 Symbol_Policy : Policy := Autonomous;
68 Verbose : Boolean := False;
69 -- True when -v switch is used
71 Quiet : Boolean := False;
72 -- True when -q switch is used
74 Symbol_File_Name : String_Access := null;
75 -- The name of the symbol file
77 Reference_Symbol_File_Name : String_Access := Empty;
78 -- The name of the reference symbol file
80 Version_String : String_Access := Empty;
81 -- The version of the library. Used on VMS.
83 package Object_Files is new Table.Table
84 (Table_Component_Type => String_Access,
85 Table_Index_Type => Natural,
88 Table_Increment => 10,
89 Table_Name => "Gnatsymb.Object_Files");
90 -- A table to store the object file names
92 Object_File : Natural := 0;
93 -- An index to traverse the Object_Files table
95 procedure Display_Copyright;
96 -- Display Copyright notice
98 procedure Parse_Cmd_Line;
99 -- Parse the command line switches and file names
104 -----------------------
105 -- Display_Copyright --
106 -----------------------
108 procedure Display_Copyright is
110 if not Copyright_Displayed then
112 Write_Str ("GNATSYMB ");
113 Write_Str (Gnat_Version_String);
115 Write_Str ("Copyright 2003-2004 Free Software Foundation, Inc");
117 Copyright_Displayed := True;
119 end Display_Copyright;
125 procedure Parse_Cmd_Line is
128 case GNAT.Command_Line.Getopt ("c C q r: R s: v V:") is
133 Symbol_Policy := Compliant;
136 Symbol_Policy := Controlled;
142 Reference_Symbol_File_Name :=
143 new String'(GNAT.Command_Line.Parameter);
146 Symbol_Policy := Restricted;
149 Symbol_File_Name := new String'(GNAT.Command_Line.Parameter);
155 Version_String := new String'(GNAT.Command_Line.Parameter);
158 Fail ("invalid switch: ", Full_Switch);
162 -- Get the file names
166 S : constant String_Access :=
167 new String'(GNAT.Command_Line.Get_Argument);
170 exit when S'Length = 0;
172 Object_Files.Increment_Last;
173 Object_Files.Table (Object_Files.Last) := S;
177 when Invalid_Switch =>
179 Fail ("invalid switch : ", Full_Switch);
188 Write_Line ("gnatsym [options] object_file {object_file}");
190 Write_Line (" -c Compliant symbol policy");
191 Write_Line (" -C Controlled symbol policy");
192 Write_Line (" -q Quiet mode");
193 Write_Line (" -r<ref> Reference symbol file name");
194 Write_Line (" -R Restricted symbol policy");
195 Write_Line (" -s<sym> Symbol file name");
196 Write_Line (" -v Verbose mode");
197 Write_Line (" -V<ver> Version");
199 Write_Line ("Specifying a symbol file with -s<sym> is compulsory");
203 -- Start of processing of Gnatsym
206 -- Initialize Object_Files table
208 Object_Files.Set_Last (0);
210 -- Parse the command line
218 -- If there is no symbol file or no object files on the command line,
219 -- display the usage and exit with an error status.
221 if Symbol_File_Name = null or else Object_Files.Last = 0 then
227 Write_Str ("Initializing symbol file """);
228 Write_Str (Symbol_File_Name.all);
232 -- Initialize symbol file and, if specified, read reference file
235 (Symbol_File => Symbol_File_Name.all,
236 Reference => Reference_Symbol_File_Name.all,
237 Symbol_Policy => Symbol_Policy,
239 Version => Version_String.all,
242 -- Process the object files in order. Stop as soon as there is
247 while Success and then Object_File < Object_Files.Last loop
248 Object_File := Object_File + 1;
251 Write_Str ("Processing object file """);
252 Write_Str (Object_Files.Table (Object_File).all);
256 Process (Object_Files.Table (Object_File).all, Success);
259 -- Finalize the object file
263 Write_Str ("Finalizing """);
264 Write_Str (Symbol_File_Name.all);
268 Finalize (Quiet, Success);
271 -- Fail if there was anything wrong
274 Fail ("unable to build symbol file");