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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 -- S Y S T E M . E X C E P T I O N S --
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6 -- --
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7 -- S p e c --
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8 -- --
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145
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9 -- Copyright (C) 2006-2019, 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 pragma Compiler_Unit_Warning;
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33
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34 package System.Exceptions is
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35
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36 pragma Preelaborate;
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37 -- To let Ada.Exceptions "with" us and let us "with" Standard_Library
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38
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39 ZCX_By_Default : constant Boolean;
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40 -- Visible copy to allow Ada.Exceptions to know the exception model
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41
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42 private
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43
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44 type Require_Body;
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45 -- Dummy Taft-amendment type to make it legal (and required) to provide
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46 -- a body for this package.
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47 --
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48 -- We do this because this unit used to have a body in earlier versions
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49 -- of GNAT, and it causes various bootstrap path problems etc if we remove
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50 -- a body, since we may pick up old unwanted bodies.
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51 --
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52 -- Note: we use this standard Ada method of requiring a body rather
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53 -- than the cleaner pragma No_Body because System.Exceptions is a compiler
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54 -- unit, and older bootstrap compilers do not support pragma No_Body. This
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55 -- type can be removed, and s-except.adb can be replaced by a source
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56 -- containing just that pragma, when we decide to move to a 2008 compiler
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57 -- as the minimal bootstrap compiler version. ???
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58
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59 ZCX_By_Default : constant Boolean := System.ZCX_By_Default;
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60
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61 Foreign_Exception : exception;
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62 pragma Unreferenced (Foreign_Exception);
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63 -- This hidden exception is used to represent non-Ada exception to
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64 -- Ada handlers. It is in fact referenced by its linking name.
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65
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66 end System.Exceptions;
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