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) 1992-2001 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,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 --  Call the back end with all the information needed. Also contains other
  28 --  back-end specific interfaces required by the front end.
  29
  30 package Back_End is
  31
  32    type Back_End_Mode_Type is (
  33       Generate_Object,
  34       --  Full back end operation with object file generation
  35
  36       Declarations_Only,
  37       --  Partial back end operation with no object file generation. In this
  38       --  mode the only useful action performed by gigi is to process all
  39       --  declarations issuing any error messages (in partcicular those to
  40       --  do with rep clauses), and to back annotate representation info.
  41
  42       Skip);
  43       --  Back end call is skipped (syntax only, or errors found)
  44
  45    pragma Convention (C, Back_End_Mode_Type);
  46    for Back_End_Mode_Type use (0, 1, 2);
  47
  48    procedure Call_Back_End (Mode : Back_End_Mode_Type);
  49    --  Call back end, i.e. make call to driver traversing the tree and
  50    --  outputting code. This call is made with all tables locked.
  51    --  The back end is responsible for unlocking any tables it may need
  52    --  to change, and locking them again before returning.
  53
  54    procedure Scan_Compiler_Arguments;
  55    --  Acquires command-line parameters passed to the compiler and processes
  56    --  them. Calls Scan_Front_End_Switches for any front-end switches
  57    --  encountered.
  58    --
  59    --  The processing of arguments is private to the back end, since
  60    --  the way of acquiring the arguments as well as the set of allowable
  61    --  back end switches is different depending on the particular back end
  62    --  being used.
  63    --
  64    --  Any processed switches that influence the result of a compilation
  65    --  must be added to the Compilation_Arguments table.
  66
  67 end Back_End;