gcc/ada/back_end.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             B A C K _ E N D                              --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2008, 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 3,  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 COPYING3.  If not, go to --
  19 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 --  Call the back end with all the information needed. Also contains other
  27 --  back-end specific interfaces required by the front end.
  28
  29 package Back_End is
  30
  31    type Back_End_Mode_Type is (
  32       Generate_Object,
  33       --  Full back end operation with object file generation
  34
  35       Declarations_Only,
  36       --  Partial back end operation with no object file generation. In this
  37       --  mode the only useful action performed by gigi is to process all
  38       --  declarations issuing any error messages (in partcicular those to
  39       --  do with rep clauses), and to back annotate representation info.
  40
  41       Skip);
  42       --  Back end call is skipped (syntax only, or errors found)
  43
  44    pragma Convention (C, Back_End_Mode_Type);
  45    for Back_End_Mode_Type use (0, 1, 2);
  46
  47    procedure Call_Back_End (Mode : Back_End_Mode_Type);
  48    --  Call back end, i.e. make call to driver traversing the tree and
  49    --  outputting code. This call is made with all tables locked.
  50    --  The back end is responsible for unlocking any tables it may need
  51    --  to change, and locking them again before returning.
  52
  53    procedure Scan_Compiler_Arguments;
  54    --  Acquires command-line parameters passed to the compiler and processes
  55    --  them. Calls Scan_Front_End_Switches for any front-end switches found.
  56    --
  57    --  The processing of arguments is private to the back end, since the way
  58    --  of acquiring the arguments as well as the set of allowable back end
  59    --  switches is different depending on the particular back end being used.
  60    --
  61    --  Any processed switches that influence the result of a compilation must
  62    --  be added to the Compilation_Arguments table.
  63
  64 end Back_End;