gcc/ada/indepsw.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              I N D E P S W                               --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2004-2009, 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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  GNATLINK platform-independent switches
  33
  34 --  Used to convert GNAT switches to their platform-dependent switch
  35 --  equivalent for the underlying linker.
  36
  37 with System.OS_Lib; use System.OS_Lib;
  38
  39 package Indepsw is
  40
  41    type Switch_Kind is
  42    --  Independent switches currently supported
  43
  44      (Map_File);
  45       --  Produce a map file. The path name of the map file to produce
  46       --  is given as an argument.
  47
  48    procedure Convert
  49      (Switch   : Switch_Kind;
  50       Argument : String;
  51       To       : out String_List_Access);
  52    --  Convert Switch to the platform-dependent linker switch (with or without
  53    --  additional arguments) To. Issue a warning if Switch is not supported
  54    --  for the platform; in this case, To is set to null.
  55
  56    function Is_Supported (Switch : Switch_Kind) return Boolean;
  57    --  Return True for each independent switch supported by the platform
  58
  59 private
  60    --  Default warning messages when the switches are not supported by the
  61    --  implementation. These are in the spec so that the platform specific
  62    --  bodies do not need to redefine them.
  63
  64    Map_File_Not_Supported : aliased String :=
  65      "the underlying linker does not allow the output of a map file";
  66
  67    No_Support_For : constant array (Switch_Kind) of String_Access :=
  68                       (Map_File => Map_File_Not_Supported'Access);
  69    --  All implementations of procedure Convert should include a case
  70    --  statements with a "when others =>" choice that output the default
  71    --  warning message:
  72
  73    --   case Switch is
  74    --      when ... =>
  75    --         ...
  76    --      when others =>
  77    --         Write_Str ("warning: ");
  78    --         Write_Line (No_Support_For (Switch).all);
  79    --         To := null;
  80    --   end case;
  81
  82 end Indepsw;