1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT COMPILER COMPONENTS                         --
4--                                                                          --
5--                             H O S T P A R M                              --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--          Copyright (C) 1992-2020, Free Software Foundation, Inc.         --
10--                                                                          --
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 3,  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 COPYING3.  If not, go to --
19-- http://www.gnu.org/licenses for a complete copy of the license.          --
20--                                                                          --
21-- GNAT was originally developed  by the GNAT team at  New York University. --
22-- Extensive contributions were provided by Ada Core Technologies Inc.      --
23--                                                                          --
24------------------------------------------------------------------------------
25
26--  This package defines some system dependent parameters for GNAT. These
27--  are parameters that are relevant to the host machine on which the
28--  compiler is running, and thus this package is part of the compiler.
29
30with Types;
31
32package Hostparm is
33
34   ---------------------
35   -- HOST Parameters --
36   ---------------------
37
38   Direct_Separator : constant Character;
39   pragma Import (C, Direct_Separator, "__gnat_dir_separator");
40   Normalized_CWD : constant String := "." & Direct_Separator;
41   --  Normalized string to access current directory
42
43   Max_Line_Length : constant :=
44     Types.Column_Number'Pred (Types.Column_Number'Last);
45   --  Maximum source line length. By default we set it to the maximum
46   --  value that can be supported, which is given by the range of the
47   --  Column_Number type. We subtract 1 because need to be able to
48   --  have a valid Column_Number equal to Max_Line_Length to represent
49   --  the location of a "line too long" error.
50   --
51   --  200 is the minimum value required (RM 2.2(15)). The value set here
52   --  can be reduced by the explicit use of the -gnatyM style switch.
53
54   Max_Name_Length : constant := 1024;
55   --  Maximum length of unit name (including all dots, and " (spec)") and
56   --  of file names in the library, must be at least Max_Line_Length, but
57   --  can be larger.
58
59   Tag_Errors : constant Boolean := False;
60   --  If set to true, then brief form error messages will be prefaced by
61   --  the string "error:". Used as default for Opt.Unique_Error_Tag.
62
63   Exclude_Missing_Objects : constant Boolean := True;
64   --  If set to true, gnatbind will exclude from consideration all
65   --  non-existent .o files.
66
67end Hostparm;
68