gcc/ada/opt.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                                  O P T                                   --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.29 $
  10 --                                                                          --
  11 --          Copyright (C) 1992-2000, Free Software Foundation, Inc.         --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNAT was originally developed  by the GNAT team at  New York University. --
  32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 with Ada.Exceptions; use Ada.Exceptions;
  37 with Gnatvsn; use Gnatvsn;
  38 with System;  use System;
  39 with Tree_IO; use Tree_IO;
  40
  41 package body Opt is
  42
  43    Tree_Version_String : String (Gnat_Version_String'Range);
  44    --  Used to store the compiler version string read from a tree file to
  45    --  check if it is the same as stored in the version ctring in Gnatvsn.
  46    --  Therefore its length is taken directly from the version string in
  47    --  Gnatvsn. If the length of the version string stored in the three is
  48    --  different, then versions are for sure different.
  49
  50    Immediate_Errors : Boolean := True;
  51    --  This is an obsolete flag that is no longer present in opt.ads. We
  52    --  retain it here because this flag was written to the tree and there
  53    --  is no point in making trees incomaptible just for the sake of saving
  54    --  one byte of data. The value written is ignored.
  55
  56    ----------------------------------
  57    -- Register_Opt_Config_Switches --
  58    ----------------------------------
  59
  60    procedure Register_Opt_Config_Switches is
  61    begin
  62       Ada_83_Config                     := Ada_83;
  63       Dynamic_Elaboration_Checks_Config := Dynamic_Elaboration_Checks;
  64       Extensions_Allowed_Config         := Extensions_Allowed;
  65       External_Name_Exp_Casing_Config   := External_Name_Exp_Casing;
  66       External_Name_Imp_Casing_Config   := External_Name_Imp_Casing;
  67       Polling_Required_Config           := Polling_Required;
  68       Use_VADS_Size_Config              := Use_VADS_Size;
  69    end Register_Opt_Config_Switches;
  70
  71    ---------------------------------
  72    -- Restore_Opt_Config_Switches --
  73    ---------------------------------
  74
  75    procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type) is
  76    begin
  77       Ada_83                     := Save.Ada_83;
  78       Ada_95                     := not Ada_83;
  79       Dynamic_Elaboration_Checks := Save.Dynamic_Elaboration_Checks;
  80       Extensions_Allowed         := Save.Extensions_Allowed;
  81       External_Name_Exp_Casing   := Save.External_Name_Exp_Casing;
  82       External_Name_Imp_Casing   := Save.External_Name_Imp_Casing;
  83       Polling_Required           := Save.Polling_Required;
  84       Use_VADS_Size              := Save.Use_VADS_Size;
  85    end Restore_Opt_Config_Switches;
  86
  87    ------------------------------
  88    -- Save_Opt_Config_Switches --
  89    ------------------------------
  90
  91    procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type) is
  92    begin
  93       Save.Ada_83                     := Ada_83;
  94       Save.Dynamic_Elaboration_Checks := Dynamic_Elaboration_Checks;
  95       Save.Extensions_Allowed         := Extensions_Allowed;
  96       Save.External_Name_Exp_Casing   := External_Name_Exp_Casing;
  97       Save.External_Name_Imp_Casing   := External_Name_Imp_Casing;
  98       Save.Polling_Required           := Polling_Required;
  99       Save.Use_VADS_Size              := Use_VADS_Size;
 100    end Save_Opt_Config_Switches;
 101
 102    -----------------------------
 103    -- Set_Opt_Config_Switches --
 104    -----------------------------
 105
 106    procedure Set_Opt_Config_Switches (Internal_Unit : Boolean) is
 107    begin
 108       if Internal_Unit then
 109          Ada_83                     := False;
 110          Ada_95                     := True;
 111          Dynamic_Elaboration_Checks := False;
 112          Extensions_Allowed         := True;
 113          External_Name_Exp_Casing   := As_Is;
 114          External_Name_Imp_Casing   := Lowercase;
 115          Use_VADS_Size              := False;
 116
 117       else
 118          Ada_83                     := Ada_83_Config;
 119          Ada_95                     := not Ada_83_Config;
 120          Dynamic_Elaboration_Checks := Dynamic_Elaboration_Checks_Config;
 121          Extensions_Allowed         := Extensions_Allowed_Config;
 122          External_Name_Exp_Casing   := External_Name_Exp_Casing_Config;
 123          External_Name_Imp_Casing   := External_Name_Imp_Casing_Config;
 124          Use_VADS_Size              := Use_VADS_Size_Config;
 125       end if;
 126
 127       Polling_Required := Polling_Required_Config;
 128    end Set_Opt_Config_Switches;
 129
 130    ---------------
 131    -- Tree_Read --
 132    ---------------
 133
 134    procedure Tree_Read is
 135       Tree_Version_String_Len : Nat;
 136
 137    begin
 138       Tree_Read_Bool (Brief_Output);
 139       Tree_Read_Bool (GNAT_Mode);
 140       Tree_Read_Char (Identifier_Character_Set);
 141       Tree_Read_Int  (Maximum_File_Name_Length);
 142       Tree_Read_Data (Suppress_Options'Address,
 143                       Suppress_Record'Object_Size / Storage_Unit);
 144       Tree_Read_Bool (Verbose_Mode);
 145       Tree_Read_Data (Warning_Mode'Address,
 146                       Warning_Mode_Type'Object_Size / Storage_Unit);
 147       Tree_Read_Bool (Ada_83_Config);
 148       Tree_Read_Bool (All_Errors_Mode);
 149       Tree_Read_Bool (Assertions_Enabled);
 150       Tree_Read_Bool (Full_List);
 151
 152       --  Read and check version string
 153
 154       Tree_Read_Int (Tree_Version_String_Len);
 155
 156       if Tree_Version_String_Len = Tree_Version_String'Length then
 157          Tree_Read_Data
 158            (Tree_Version_String'Address, Tree_Version_String'Length);
 159       end if;
 160
 161       if Tree_Version_String_Len /= Tree_Version_String'Length
 162         or else Tree_Version_String /= Gnat_Version_String
 163       then
 164          Raise_Exception
 165            (Program_Error'Identity, "Inconsistent versions of GNAT and ASIS");
 166       end if;
 167
 168       Tree_Read_Data (Distribution_Stub_Mode'Address,
 169                       Distribution_Stub_Mode_Type'Object_Size / Storage_Unit);
 170       Tree_Read_Bool (Immediate_Errors);
 171       Tree_Read_Bool (Inline_Active);
 172       Tree_Read_Bool (Inline_Processing_Required);
 173       Tree_Read_Bool (List_Units);
 174       Tree_Read_Bool (No_Run_Time);
 175       Tree_Read_Data (Operating_Mode'Address,
 176                       Operating_Mode_Type'Object_Size / Storage_Unit);
 177       Tree_Read_Bool (Software_Overflow_Checking);
 178       Tree_Read_Bool (Try_Semantics);
 179       Tree_Read_Data (Wide_Character_Encoding_Method'Address,
 180                       WC_Encoding_Method'Object_Size / Storage_Unit);
 181       Tree_Read_Bool (Upper_Half_Encoding);
 182       Tree_Read_Bool (Force_ALI_Tree_File);
 183    end Tree_Read;
 184
 185    ----------------
 186    -- Tree_Write --
 187    ----------------
 188
 189    procedure Tree_Write is
 190    begin
 191       Tree_Write_Bool (Brief_Output);
 192       Tree_Write_Bool (GNAT_Mode);
 193       Tree_Write_Char (Identifier_Character_Set);
 194       Tree_Write_Int  (Maximum_File_Name_Length);
 195       Tree_Write_Data (Suppress_Options'Address,
 196                        Suppress_Record'Object_Size / Storage_Unit);
 197       Tree_Write_Bool (Verbose_Mode);
 198       Tree_Write_Data (Warning_Mode'Address,
 199                        Warning_Mode_Type'Object_Size / Storage_Unit);
 200       Tree_Write_Bool (Ada_83_Config);
 201       Tree_Write_Bool (All_Errors_Mode);
 202       Tree_Write_Bool (Assertions_Enabled);
 203       Tree_Write_Bool (Full_List);
 204       Tree_Write_Int  (Int (Gnat_Version_String'Length));
 205       Tree_Write_Data (Gnat_Version_String'Address,
 206                        Gnat_Version_String'Length);
 207       Tree_Write_Data (Distribution_Stub_Mode'Address,
 208                        Distribution_Stub_Mode_Type'Object_Size / Storage_Unit);
 209       Tree_Write_Bool (Immediate_Errors);
 210       Tree_Write_Bool (Inline_Active);
 211       Tree_Write_Bool (Inline_Processing_Required);
 212       Tree_Write_Bool (List_Units);
 213       Tree_Write_Bool (No_Run_Time);
 214       Tree_Write_Data (Operating_Mode'Address,
 215                        Operating_Mode_Type'Object_Size / Storage_Unit);
 216       Tree_Write_Bool (Software_Overflow_Checking);
 217       Tree_Write_Bool (Try_Semantics);
 218       Tree_Write_Data (Wide_Character_Encoding_Method'Address,
 219                        WC_Encoding_Method'Object_Size / Storage_Unit);
 220       Tree_Write_Bool (Upper_Half_Encoding);
 221       Tree_Write_Bool (Force_ALI_Tree_File);
 222    end Tree_Write;
 223
 224 end Opt;