gcc/ada/opt.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                                  O P T                                   --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2001, 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 2,  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.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, USA.                                                      --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 with Ada.Exceptions; use Ada.Exceptions;
  35 with Gnatvsn; use Gnatvsn;
  36 with System;  use System;
  37 with Tree_IO; use Tree_IO;
  38
  39 package body Opt is
  40
  41    Tree_Version_String : String (Gnat_Version_String'Range);
  42    --  Used to store the compiler version string read from a tree file to
  43    --  check if it is the same as stored in the version ctring in Gnatvsn.
  44    --  Therefore its length is taken directly from the version string in
  45    --  Gnatvsn. If the length of the version string stored in the three is
  46    --  different, then versions are for sure different.
  47
  48    Immediate_Errors : Boolean := True;
  49    --  This is an obsolete flag that is no longer present in opt.ads. We
  50    --  retain it here because this flag was written to the tree and there
  51    --  is no point in making trees incomaptible just for the sake of saving
  52    --  one byte of data. The value written is ignored.
  53
  54    ----------------------------------
  55    -- Register_Opt_Config_Switches --
  56    ----------------------------------
  57
  58    procedure Register_Opt_Config_Switches is
  59    begin
  60       Ada_83_Config                     := Ada_83;
  61       Dynamic_Elaboration_Checks_Config := Dynamic_Elaboration_Checks;
  62       Extensions_Allowed_Config         := Extensions_Allowed;
  63       External_Name_Exp_Casing_Config   := External_Name_Exp_Casing;
  64       External_Name_Imp_Casing_Config   := External_Name_Imp_Casing;
  65       Polling_Required_Config           := Polling_Required;
  66       Use_VADS_Size_Config              := Use_VADS_Size;
  67    end Register_Opt_Config_Switches;
  68
  69    ---------------------------------
  70    -- Restore_Opt_Config_Switches --
  71    ---------------------------------
  72
  73    procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type) is
  74    begin
  75       Ada_83                     := Save.Ada_83;
  76       Ada_95                     := not Ada_83;
  77       Dynamic_Elaboration_Checks := Save.Dynamic_Elaboration_Checks;
  78       Extensions_Allowed         := Save.Extensions_Allowed;
  79       External_Name_Exp_Casing   := Save.External_Name_Exp_Casing;
  80       External_Name_Imp_Casing   := Save.External_Name_Imp_Casing;
  81       Polling_Required           := Save.Polling_Required;
  82       Use_VADS_Size              := Save.Use_VADS_Size;
  83    end Restore_Opt_Config_Switches;
  84
  85    ------------------------------
  86    -- Save_Opt_Config_Switches --
  87    ------------------------------
  88
  89    procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type) is
  90    begin
  91       Save.Ada_83                     := Ada_83;
  92       Save.Dynamic_Elaboration_Checks := Dynamic_Elaboration_Checks;
  93       Save.Extensions_Allowed         := Extensions_Allowed;
  94       Save.External_Name_Exp_Casing   := External_Name_Exp_Casing;
  95       Save.External_Name_Imp_Casing   := External_Name_Imp_Casing;
  96       Save.Polling_Required           := Polling_Required;
  97       Save.Use_VADS_Size              := Use_VADS_Size;
  98    end Save_Opt_Config_Switches;
  99
 100    -----------------------------
 101    -- Set_Opt_Config_Switches --
 102    -----------------------------
 103
 104    procedure Set_Opt_Config_Switches (Internal_Unit : Boolean) is
 105    begin
 106       if Internal_Unit then
 107          Ada_83                     := False;
 108          Ada_95                     := True;
 109          Dynamic_Elaboration_Checks := False;
 110          Extensions_Allowed         := True;
 111          External_Name_Exp_Casing   := As_Is;
 112          External_Name_Imp_Casing   := Lowercase;
 113          Use_VADS_Size              := False;
 114
 115       else
 116          Ada_83                     := Ada_83_Config;
 117          Ada_95                     := not Ada_83_Config;
 118          Dynamic_Elaboration_Checks := Dynamic_Elaboration_Checks_Config;
 119          Extensions_Allowed         := Extensions_Allowed_Config;
 120          External_Name_Exp_Casing   := External_Name_Exp_Casing_Config;
 121          External_Name_Imp_Casing   := External_Name_Imp_Casing_Config;
 122          Use_VADS_Size              := Use_VADS_Size_Config;
 123       end if;
 124
 125       Polling_Required := Polling_Required_Config;
 126    end Set_Opt_Config_Switches;
 127
 128    ---------------
 129    -- Tree_Read --
 130    ---------------
 131
 132    procedure Tree_Read is
 133       Tree_Version_String_Len : Nat;
 134
 135    begin
 136       Tree_Read_Bool (Brief_Output);
 137       Tree_Read_Bool (GNAT_Mode);
 138       Tree_Read_Char (Identifier_Character_Set);
 139       Tree_Read_Int  (Maximum_File_Name_Length);
 140       Tree_Read_Data (Suppress_Options'Address,
 141                       Suppress_Record'Object_Size / Storage_Unit);
 142       Tree_Read_Bool (Verbose_Mode);
 143       Tree_Read_Data (Warning_Mode'Address,
 144                       Warning_Mode_Type'Object_Size / Storage_Unit);
 145       Tree_Read_Bool (Ada_83_Config);
 146       Tree_Read_Bool (All_Errors_Mode);
 147       Tree_Read_Bool (Assertions_Enabled);
 148       Tree_Read_Bool (Enable_Overflow_Checks);
 149       Tree_Read_Bool (Full_List);
 150
 151       --  Read and check version string
 152
 153       Tree_Read_Int (Tree_Version_String_Len);
 154
 155       if Tree_Version_String_Len = Tree_Version_String'Length then
 156          Tree_Read_Data
 157            (Tree_Version_String'Address, Tree_Version_String'Length);
 158       end if;
 159
 160       if Tree_Version_String_Len /= Tree_Version_String'Length
 161         or else Tree_Version_String /= Gnat_Version_String
 162       then
 163          Raise_Exception
 164            (Program_Error'Identity, "Inconsistent versions of GNAT and ASIS");
 165       end if;
 166
 167       Tree_Read_Data (Distribution_Stub_Mode'Address,
 168                       Distribution_Stub_Mode_Type'Object_Size / Storage_Unit);
 169       Tree_Read_Bool (Immediate_Errors);
 170       Tree_Read_Bool (Inline_Active);
 171       Tree_Read_Bool (Inline_Processing_Required);
 172       Tree_Read_Bool (List_Units);
 173       Tree_Read_Bool (No_Run_Time);
 174       Tree_Read_Data (Operating_Mode'Address,
 175                       Operating_Mode_Type'Object_Size / Storage_Unit);
 176       Tree_Read_Bool (Suppress_Checks);
 177       Tree_Read_Bool (Try_Semantics);
 178       Tree_Read_Data (Wide_Character_Encoding_Method'Address,
 179                       WC_Encoding_Method'Object_Size / Storage_Unit);
 180       Tree_Read_Bool (Upper_Half_Encoding);
 181       Tree_Read_Bool (Force_ALI_Tree_File);
 182    end Tree_Read;
 183
 184    ----------------
 185    -- Tree_Write --
 186    ----------------
 187
 188    procedure Tree_Write is
 189    begin
 190       Tree_Write_Bool (Brief_Output);
 191       Tree_Write_Bool (GNAT_Mode);
 192       Tree_Write_Char (Identifier_Character_Set);
 193       Tree_Write_Int  (Maximum_File_Name_Length);
 194       Tree_Write_Data (Suppress_Options'Address,
 195                        Suppress_Record'Object_Size / Storage_Unit);
 196       Tree_Write_Bool (Verbose_Mode);
 197       Tree_Write_Data (Warning_Mode'Address,
 198                        Warning_Mode_Type'Object_Size / Storage_Unit);
 199       Tree_Write_Bool (Ada_83_Config);
 200       Tree_Write_Bool (All_Errors_Mode);
 201       Tree_Write_Bool (Assertions_Enabled);
 202       Tree_Write_Bool (Enable_Overflow_Checks);
 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 (Suppress_Checks);
 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;