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) 2004-2005, 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 --  GNATLINK platform-independent switches
  35
  36 --  Used to convert GNAT switches to their platform-dependent switch
  37 --  equivalent for the underlying linker.
  38
  39 with GNAT.OS_Lib; use GNAT.OS_Lib;
  40
  41 package Indepsw is
  42
  43    type Switch_Kind is
  44    --  Independent switches currently supported
  45
  46      (Map_File);
  47       --  Produce a map file. The path name of the map file to produce
  48       --  is given as an argument.
  49
  50    procedure Convert
  51      (Switch   : Switch_Kind;
  52       Argument : String;
  53       To       : out String_List_Access);
  54    --  Convert Switch to the platform-dependent linker switch (with or without
  55    --  additional arguments) To. Issue a warning if Switch is not supported
  56    --  for the platform; in this case, To is set to null.
  57
  58    function Is_Supported (Switch : Switch_Kind) return Boolean;
  59    --  Return True for each independent switch supported by the platform
  60
  61 private
  62    --  Default warning messages when the switches are not supported by the
  63    --  implementation. These are in the spec so that the platform specific
  64    --  bodies do not need to redefine them.
  65
  66    Map_File_Not_Supported : aliased String :=
  67      "the underlying linker does not allow the output of a map file";
  68
  69    No_Support_For : constant array (Switch_Kind) of String_Access :=
  70                       (Map_File => Map_File_Not_Supported'Access);
  71    --  All implementations of procedure Convert should include a case
  72    --  statements with a "when others =>" choice that output the default
  73    --  warning message:
  74
  75    --   case Switch is
  76    --      when ... =>
  77    --         ...
  78    --      when others =>
  79    --         Write_Str ("warning: ");
  80    --         Write_Line (No_Support_For (Switch).all);
  81    --         To := null;
  82    --   end case;
  83
  84 end Indepsw;