gcc/ada/hostparm.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             H O S T P A R M                              --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                                                                          --
  10 --          Copyright (C) 1992-2002 Free Software Foundation, Inc.          --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This package defines some system dependent parameters for GNAT. These
  36 --  are parameters that are relevant to the host machine on which the
  37 --  compiler is running, and thus this package is part of the compiler.
  38
  39 package Hostparm is
  40
  41    -----------------------
  42    -- TARGET Parameters --
  43    -----------------------
  44
  45    --  ??? The following should really be moved to a Target package
  46
  47    Java_VM : constant Boolean := False;
  48    --  Set true when compiling the JGNAT tool chain (compiler, gnatmake, etc)
  49
  50    ---------------------
  51    -- HOST Parameters --
  52    ---------------------
  53
  54    Gnat_VMSp : Integer;
  55    pragma Import (C, Gnat_VMSp, "__gnat_vmsp");
  56
  57    OpenVMS : Boolean := Gnat_VMSp /= 0;
  58    --  Set True for OpenVMS host. See also OpenVMS target boolean in
  59    --  5vsystem.ads and OpenVMS_On_Target boolean in Targparm. This is
  60    --  not a constant, because it can be modified by -gnatdm.
  61
  62    Normalized_CWD : constant String := "./";
  63    --  Normalized string to access current directory
  64
  65    Max_Line_Length : constant := 255;
  66    --  Maximum source line length. This can be set to any value up to
  67    --  2**15 - 1, a limit imposed by the assumption that column numbers
  68    --  can be stored in 16 bits (see Types.Column_Number). A value of
  69    --  200 is the minimum value required (RM 2.2(15)), but we use 255
  70    --  for most GNAT targets since this is DEC Ada compatible.
  71
  72    Max_Name_Length : constant := 1024;
  73    --  Maximum length of unit name (including all dots, and " (spec)") and
  74    --  of file names in the library, must be at least Max_Line_Length, but
  75    --  can be larger.
  76
  77    Max_Instantiations : constant := 4000;
  78    --  Maximum number of instantiations permitted (to stop runaway cases
  79    --  of nested instantiations). These situations probably only occur in
  80    --  specially concocted test cases.
  81
  82    Tag_Errors : constant Boolean := False;
  83    --  If set to true, then brief form error messages will be prefaced by
  84    --  the string "error:". Used as default for Opt.Unique_Error_Tag.
  85
  86    Exclude_Missing_Objects : constant Boolean := True;
  87    --  If set to true, gnatbind will exclude from consideration all
  88    --  non-existent .o files.
  89
  90    Max_Debug_Name_Length : constant := 256;
  91    --  If a generated qualified debug name exceeds this length, then it
  92    --  is automatically compressed, regardless of the setting of the
  93    --  Compress_Debug_Names switch controlled by -gnatC.
  94
  95 end Hostparm;