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) 1992-2006, 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,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, 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 Gnatvsn; use Gnatvsn;
  35 with System;  use System;
  36 with Tree_IO; use Tree_IO;
  37
  38 package body Opt is
  39
  40    ----------------------------------
  41    -- Register_Opt_Config_Switches --
  42    ----------------------------------
  43
  44    procedure Register_Opt_Config_Switches is
  45    begin
  46       Ada_Version_Config                    := Ada_Version;
  47       Ada_Version_Explicit_Config           := Ada_Version_Explicit;
  48       Assertions_Enabled_Config             := Assertions_Enabled;
  49       Debug_Pragmas_Enabled_Config          := Debug_Pragmas_Enabled;
  50       Dynamic_Elaboration_Checks_Config     := Dynamic_Elaboration_Checks;
  51       Exception_Locations_Suppressed_Config := Exception_Locations_Suppressed;
  52       Extensions_Allowed_Config             := Extensions_Allowed;
  53       External_Name_Exp_Casing_Config       := External_Name_Exp_Casing;
  54       External_Name_Imp_Casing_Config       := External_Name_Imp_Casing;
  55       Persistent_BSS_Mode_Config            := Persistent_BSS_Mode;
  56       Polling_Required_Config               := Polling_Required;
  57       Use_VADS_Size_Config                  := Use_VADS_Size;
  58    end Register_Opt_Config_Switches;
  59
  60    ---------------------------------
  61    -- Restore_Opt_Config_Switches --
  62    ---------------------------------
  63
  64    procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type) is
  65    begin
  66       Ada_Version                    := Save.Ada_Version;
  67       Ada_Version_Explicit           := Save.Ada_Version_Explicit;
  68       Assertions_Enabled             := Save.Assertions_Enabled;
  69       Debug_Pragmas_Enabled          := Save.Debug_Pragmas_Enabled;
  70       Dynamic_Elaboration_Checks     := Save.Dynamic_Elaboration_Checks;
  71       Exception_Locations_Suppressed := Save.Exception_Locations_Suppressed;
  72       Extensions_Allowed             := Save.Extensions_Allowed;
  73       External_Name_Exp_Casing       := Save.External_Name_Exp_Casing;
  74       External_Name_Imp_Casing       := Save.External_Name_Imp_Casing;
  75       Persistent_BSS_Mode            := Save.Persistent_BSS_Mode;
  76       Polling_Required               := Save.Polling_Required;
  77       Use_VADS_Size                  := Save.Use_VADS_Size;
  78    end Restore_Opt_Config_Switches;
  79
  80    ------------------------------
  81    -- Save_Opt_Config_Switches --
  82    ------------------------------
  83
  84    procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type) is
  85    begin
  86       Save.Ada_Version                    := Ada_Version;
  87       Save.Ada_Version_Explicit           := Ada_Version_Explicit;
  88       Save.Assertions_Enabled             := Assertions_Enabled;
  89       Save.Debug_Pragmas_Enabled          := Debug_Pragmas_Enabled;
  90       Save.Dynamic_Elaboration_Checks     := Dynamic_Elaboration_Checks;
  91       Save.Exception_Locations_Suppressed := Exception_Locations_Suppressed;
  92       Save.Extensions_Allowed             := Extensions_Allowed;
  93       Save.External_Name_Exp_Casing       := External_Name_Exp_Casing;
  94       Save.External_Name_Imp_Casing       := External_Name_Imp_Casing;
  95       Save.Persistent_BSS_Mode            := Persistent_BSS_Mode;
  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
 105      (Internal_Unit : Boolean;
 106       Main_Unit     : Boolean)
 107    is
 108    begin
 109       --  Case of internal unit
 110
 111       if Internal_Unit then
 112
 113          --  Set standard switches. Note we do NOT set Ada_Version_Explicit
 114          --  since the whole point of this is that it still properly indicates
 115          --  the configuration setting even in a run time unit.
 116
 117          Ada_Version                := Ada_Version_Runtime;
 118          Dynamic_Elaboration_Checks := False;
 119          Extensions_Allowed         := True;
 120          External_Name_Exp_Casing   := As_Is;
 121          External_Name_Imp_Casing   := Lowercase;
 122          Persistent_BSS_Mode        := False;
 123          Use_VADS_Size              := False;
 124
 125          --  For an internal unit, assertions/debug pragmas are off unless this
 126          --  is the main unit and they were explicitly enabled.
 127
 128          if Main_Unit then
 129             Assertions_Enabled    := Assertions_Enabled_Config;
 130             Debug_Pragmas_Enabled := Debug_Pragmas_Enabled_Config;
 131          else
 132             Assertions_Enabled    := False;
 133             Debug_Pragmas_Enabled := False;
 134          end if;
 135
 136       --  Case of non-internal unit
 137
 138       else
 139          Ada_Version                := Ada_Version_Config;
 140          Ada_Version_Explicit       := Ada_Version_Explicit_Config;
 141          Assertions_Enabled         := Assertions_Enabled_Config;
 142          Debug_Pragmas_Enabled      := Debug_Pragmas_Enabled_Config;
 143          Dynamic_Elaboration_Checks := Dynamic_Elaboration_Checks_Config;
 144          Extensions_Allowed         := Extensions_Allowed_Config;
 145          External_Name_Exp_Casing   := External_Name_Exp_Casing_Config;
 146          External_Name_Imp_Casing   := External_Name_Imp_Casing_Config;
 147          Persistent_BSS_Mode        := Persistent_BSS_Mode_Config;
 148          Use_VADS_Size              := Use_VADS_Size_Config;
 149       end if;
 150
 151       Exception_Locations_Suppressed := Exception_Locations_Suppressed_Config;
 152       Polling_Required               := Polling_Required_Config;
 153    end Set_Opt_Config_Switches;
 154
 155    ---------------
 156    -- Tree_Read --
 157    ---------------
 158
 159    procedure Tree_Read is
 160       Tree_Version_String_Len         : Nat;
 161       Ada_Version_Config_Val          : Nat;
 162       Ada_Version_Explicit_Config_Val : Nat;
 163       Assertions_Enabled_Config_Val   : Nat;
 164
 165    begin
 166       Tree_Read_Int  (Tree_ASIS_Version_Number);
 167       Tree_Read_Bool (Brief_Output);
 168       Tree_Read_Bool (GNAT_Mode);
 169       Tree_Read_Char (Identifier_Character_Set);
 170       Tree_Read_Int  (Maximum_File_Name_Length);
 171       Tree_Read_Data (Suppress_Options'Address,
 172                       Suppress_Array'Object_Size / Storage_Unit);
 173       Tree_Read_Bool (Verbose_Mode);
 174       Tree_Read_Data (Warning_Mode'Address,
 175                       Warning_Mode_Type'Object_Size / Storage_Unit);
 176       Tree_Read_Int  (Ada_Version_Config_Val);
 177       Tree_Read_Int  (Ada_Version_Explicit_Config_Val);
 178       Tree_Read_Int  (Assertions_Enabled_Config_Val);
 179       Tree_Read_Bool (All_Errors_Mode);
 180       Tree_Read_Bool (Assertions_Enabled);
 181       Tree_Read_Bool (Debug_Pragmas_Enabled);
 182       Tree_Read_Bool (Enable_Overflow_Checks);
 183       Tree_Read_Bool (Full_List);
 184
 185       Ada_Version_Config :=
 186         Ada_Version_Type'Val (Ada_Version_Config_Val);
 187       Ada_Version_Explicit_Config :=
 188         Ada_Version_Type'Val (Ada_Version_Explicit_Config_Val);
 189       Assertions_Enabled_Config :=
 190         Boolean'Val (Assertions_Enabled_Config_Val);
 191
 192       --  Read version string: we have to get the length first
 193
 194       Tree_Read_Int (Tree_Version_String_Len);
 195
 196       declare
 197          Tmp : String (1 .. Integer (Tree_Version_String_Len));
 198       begin
 199          Tree_Read_Data
 200            (Tmp'Address, Tree_Version_String_Len);
 201          GNAT.Strings.Free (Tree_Version_String);
 202          Free (Tree_Version_String);
 203          Tree_Version_String := new String'(Tmp);
 204       end;
 205
 206       Tree_Read_Data (Distribution_Stub_Mode'Address,
 207                       Distribution_Stub_Mode_Type'Object_Size / Storage_Unit);
 208       Tree_Read_Bool (Inline_Active);
 209       Tree_Read_Bool (Inline_Processing_Required);
 210       Tree_Read_Bool (List_Units);
 211       Tree_Read_Bool (Configurable_Run_Time_Mode);
 212       Tree_Read_Data (Operating_Mode'Address,
 213                       Operating_Mode_Type'Object_Size / Storage_Unit);
 214       Tree_Read_Bool (Suppress_Checks);
 215       Tree_Read_Bool (Try_Semantics);
 216       Tree_Read_Data (Wide_Character_Encoding_Method'Address,
 217                       WC_Encoding_Method'Object_Size / Storage_Unit);
 218       Tree_Read_Bool (Upper_Half_Encoding);
 219       Tree_Read_Bool (Force_ALI_Tree_File);
 220    end Tree_Read;
 221
 222    ----------------
 223    -- Tree_Write --
 224    ----------------
 225
 226    procedure Tree_Write is
 227       Version_String : String := Gnat_Version_String;
 228
 229    begin
 230       Tree_Write_Int  (ASIS_Version_Number);
 231       Tree_Write_Bool (Brief_Output);
 232       Tree_Write_Bool (GNAT_Mode);
 233       Tree_Write_Char (Identifier_Character_Set);
 234       Tree_Write_Int  (Maximum_File_Name_Length);
 235       Tree_Write_Data (Suppress_Options'Address,
 236                        Suppress_Array'Object_Size / Storage_Unit);
 237       Tree_Write_Bool (Verbose_Mode);
 238       Tree_Write_Data (Warning_Mode'Address,
 239                        Warning_Mode_Type'Object_Size / Storage_Unit);
 240       Tree_Write_Int  (Ada_Version_Type'Pos (Ada_Version_Config));
 241       Tree_Write_Int  (Ada_Version_Type'Pos (Ada_Version_Explicit_Config));
 242       Tree_Write_Int  (Boolean'Pos (Assertions_Enabled_Config));
 243       Tree_Write_Bool (All_Errors_Mode);
 244       Tree_Write_Bool (Assertions_Enabled);
 245       Tree_Write_Bool (Debug_Pragmas_Enabled);
 246       Tree_Write_Bool (Enable_Overflow_Checks);
 247       Tree_Write_Bool (Full_List);
 248       Tree_Write_Int  (Int (Version_String'Length));
 249       Tree_Write_Data (Version_String'Address,
 250                        Version_String'Length);
 251       Tree_Write_Data (Distribution_Stub_Mode'Address,
 252                        Distribution_Stub_Mode_Type'Object_Size / Storage_Unit);
 253       Tree_Write_Bool (Inline_Active);
 254       Tree_Write_Bool (Inline_Processing_Required);
 255       Tree_Write_Bool (List_Units);
 256       Tree_Write_Bool (Configurable_Run_Time_Mode);
 257       Tree_Write_Data (Operating_Mode'Address,
 258                        Operating_Mode_Type'Object_Size / Storage_Unit);
 259       Tree_Write_Bool (Suppress_Checks);
 260       Tree_Write_Bool (Try_Semantics);
 261       Tree_Write_Data (Wide_Character_Encoding_Method'Address,
 262                        WC_Encoding_Method'Object_Size / Storage_Unit);
 263       Tree_Write_Bool (Upper_Half_Encoding);
 264       Tree_Write_Bool (Force_ALI_Tree_File);
 265    end Tree_Write;
 266
 267 end Opt;