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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- H O S T P A R M --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 1992-2019, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 -- This package defines some system dependent parameters for GNAT. These
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33 -- are parameters that are relevant to the host machine on which the
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34 -- compiler is running, and thus this package is part of the compiler.
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35
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36 with Types;
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37
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38 package Hostparm is
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39
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40 ---------------------
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41 -- HOST Parameters --
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42 ---------------------
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43
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44 Direct_Separator : constant Character;
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45 pragma Import (C, Direct_Separator, "__gnat_dir_separator");
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46 Normalized_CWD : constant String := "." & Direct_Separator;
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47 -- Normalized string to access current directory
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48
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49 Max_Line_Length : constant :=
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50 Types.Column_Number'Pred (Types.Column_Number'Last);
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51 -- Maximum source line length. By default we set it to the maximum
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52 -- value that can be supported, which is given by the range of the
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53 -- Column_Number type. We subtract 1 because need to be able to
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54 -- have a valid Column_Number equal to Max_Line_Length to represent
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55 -- the location of a "line too long" error.
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56 --
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57 -- 200 is the minimum value required (RM 2.2(15)). The value set here
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58 -- can be reduced by the explicit use of the -gnatyM style switch.
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59
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60 Max_Name_Length : constant := 1024;
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61 -- Maximum length of unit name (including all dots, and " (spec)") and
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62 -- of file names in the library, must be at least Max_Line_Length, but
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63 -- can be larger.
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64
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65 Tag_Errors : constant Boolean := False;
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66 -- If set to true, then brief form error messages will be prefaced by
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67 -- the string "error:". Used as default for Opt.Unique_Error_Tag.
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68
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69 Exclude_Missing_Objects : constant Boolean := True;
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70 -- If set to true, gnatbind will exclude from consideration all
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71 -- non-existent .o files.
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72
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73 end Hostparm;
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