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) 1992-2013, 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.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNAT was originally developed  by the GNAT team at  New York University. --
28-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29--                                                                          --
30------------------------------------------------------------------------------
31
32--  This package defines some system dependent parameters for GNAT. These
33--  are parameters that are relevant to the host machine on which the
34--  compiler is running, and thus this package is part of the compiler.
35
36with Types;
37
38package Hostparm is
39
40   ---------------------
41   -- HOST Parameters --
42   ---------------------
43
44   Gnat_VMSp : Integer;
45   pragma Import (C, Gnat_VMSp, "__gnat_vmsp");
46
47   OpenVMS : Boolean := Gnat_VMSp /= 0;
48   --  Set True for OpenVMS host. See also OpenVMS target boolean in
49   --  system-vms.ads and system-vms_64.ads and OpenVMS_On_Target boolean in
50   --  Targparm. This is not a constant, because it can be modified by -gnatdm.
51
52   Direct_Separator : constant Character;
53   pragma Import (C, Direct_Separator, "__gnat_dir_separator");
54   Normalized_CWD : constant String := "." & Direct_Separator;
55   --  Normalized string to access current directory
56
57   Max_Line_Length : constant :=
58     Types.Column_Number'Pred (Types.Column_Number'Last);
59   --  Maximum source line length. By default we set it to the maximum
60   --  value that can be supported, which is given by the range of the
61   --  Column_Number type. We subtract 1 because need to be able to
62   --  have a valid Column_Number equal to Max_Line_Length to represent
63   --  the location of a "line too long" error.
64   --
65   --  200 is the minimum value required (RM 2.2(15)). The value set here
66   --  can be reduced by the explicit use of the -gnatyM style switch.
67
68   Max_Name_Length : constant := 1024;
69   --  Maximum length of unit name (including all dots, and " (spec)") and
70   --  of file names in the library, must be at least Max_Line_Length, but
71   --  can be larger.
72
73   Tag_Errors : constant Boolean := False;
74   --  If set to true, then brief form error messages will be prefaced by
75   --  the string "error:". Used as default for Opt.Unique_Error_Tag.
76
77   Exclude_Missing_Objects : constant Boolean := True;
78   --  If set to true, gnatbind will exclude from consideration all
79   --  non-existent .o files.
80
81   Max_Debug_Name_Length : constant := 256;
82   --  If a generated qualified debug name exceeds this length, then it
83   --  is automatically compressed, regardless of the setting of the
84   --  Compress_Debug_Names switch controlled by -gnatC.
85
86end Hostparm;
87