gcc/ada/make_util.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                            M A K E _ U T I L                             --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2004-2017, 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 --  This package contains various subprograms used by the builders, in
  27 --  particular those subprograms related to build queue management.
  28
  29 with Namet; use Namet;
  30 with Opt;
  31 with Osint;
  32 with Types; use Types;
  33
  34 with GNAT.OS_Lib; use GNAT.OS_Lib;
  35
  36 package Make_Util is
  37
  38    type Fail_Proc is access procedure (S : String);
  39    --  Pointer to procedure which outputs a failure message
  40
  41    --  Root_Environment : Prj.Tree.Environment;
  42    --  The environment coming from environment variables and command line
  43    --  switches. When we do not have an aggregate project, this is used for
  44    --  parsing the project tree. When we have an aggregate project, this is
  45    --  used to parse the aggregate project; the latter then generates another
  46    --  environment (with additional external values and project path) to parse
  47    --  the aggregated projects.
  48
  49    --  Default_Config_Name : constant String := "default.cgpr";
  50    --  Name of the configuration file used by gprbuild and generated by
  51    --  gprconfig by default.
  52
  53    On_Windows : constant Boolean := Directory_Separator = '\';
  54    --  True when on Windows
  55
  56    Source_Info_Option : constant String := "--source-info=";
  57    --  Switch to indicate the source info file
  58
  59    Subdirs_Option : constant String := "--subdirs=";
  60    --  Switch used to indicate that the real directories (object, exec,
  61    --  library, ...) are subdirectories of those in the project file.
  62
  63    Relocate_Build_Tree_Option : constant String := "--relocate-build-tree";
  64    --  Switch to build out-of-tree. In this context the object, exec and
  65    --  library directories are relocated to the current working directory
  66    --  or the directory specified as parameter to this option.
  67
  68    Unchecked_Shared_Lib_Imports : constant String :=
  69                                     "--unchecked-shared-lib-imports";
  70    --  Command line switch to allow shared library projects to import projects
  71    --  that are not shared library projects.
  72
  73    Single_Compile_Per_Obj_Dir_Switch : constant String :=
  74                                          "--single-compile-per-obj-dir";
  75    --  Switch to forbid simultaneous compilations for the same object directory
  76    --  when project files are used.
  77
  78    Create_Map_File_Switch : constant String := "--create-map-file";
  79    --  Switch to create a map file when an executable is linked
  80
  81    No_Exit_Message_Option : constant String := "--no-exit-message";
  82    --  Switch to suppress exit error message when there are compilation
  83    --  failures. This is useful when a tool, such as gnatprove, silently calls
  84    --  the builder and does not want to pollute its output with error messages
  85    --  coming from the builder. This is an internal switch.
  86
  87    Keep_Temp_Files_Option : constant String := "--keep-temp-files";
  88    --  Switch to suppress deletion of temp files created by the builder.
  89    --  Note that debug switch -gnatdn also has this effect.
  90
  91    procedure Add
  92      (Option : String_Access;
  93       To     : in out String_List_Access;
  94       Last   : in out Natural);
  95    procedure Add
  96      (Option : String;
  97       To     : in out String_List_Access;
  98       Last   : in out Natural);
  99    --  Add a string to a list of strings
 100
 101    function Create_Name (Name : String) return File_Name_Type;
 102    function Create_Name (Name : String) return Name_Id;
 103    function Create_Name (Name : String) return Path_Name_Type;
 104    --  Get an id for a name
 105
 106    function Base_Name_Index_For
 107      (Main            : String;
 108       Main_Index      : Int;
 109       Index_Separator : Character) return File_Name_Type;
 110    --  Returns the base name of Main, without the extension, followed by the
 111    --  Index_Separator followed by the Main_Index if it is non-zero.
 112
 113    function Executable_Prefix_Path return String;
 114    --  Return the absolute path parent directory of the directory where the
 115    --  current executable resides, if its directory is named "bin", otherwise
 116    --  return an empty string. When a directory is returned, it is guaranteed
 117    --  to end with a directory separator.
 118
 119    procedure Inform (N : Name_Id := No_Name; Msg : String);
 120    procedure Inform (N : File_Name_Type; Msg : String);
 121    --  Prints out the program name followed by a colon, N and S
 122
 123    procedure Ensure_Absolute_Path
 124      (Switch               : in out String_Access;
 125       Parent               : String;
 126       Do_Fail              : Fail_Proc;
 127       For_Gnatbind         : Boolean := False;
 128       Including_Non_Switch : Boolean := True;
 129       Including_RTS        : Boolean := False);
 130    --  Do nothing if Switch is an absolute path switch. If relative, fail if
 131    --  Parent is the empty string, otherwise prepend the path with Parent. This
 132    --  subprogram is only used when using project files. If For_Gnatbind is
 133    --  True, consider gnatbind specific syntax for -L (not a path, left
 134    --  unchanged) and -A (path is optional, preceded with "=" if present).
 135    --  If Including_RTS is True, process also switches --RTS=. Do_Fail is
 136    --  called in case of error. Using Osint.Fail might be appropriate.
 137
 138    type Name_Ids is array (Positive range <>) of Name_Id;
 139    No_Names : constant Name_Ids := (1 .. 0 => No_Name);
 140    --  Name_Ids is used for list of language names in procedure Get_Directories
 141    --  below.
 142
 143    function Path_Or_File_Name (Path : Path_Name_Type) return String;
 144    --  Returns a file name if -df is used, otherwise return a path name
 145
 146    function Unit_Index_Of (ALI_File : File_Name_Type) return Int;
 147    --  Find the index of a unit in a source file. Return zero if the file is
 148    --  not a multi-unit source file.
 149
 150    procedure Verbose_Msg
 151      (N1                : Name_Id;
 152       S1                : String;
 153       N2                : Name_Id := No_Name;
 154       S2                : String  := "";
 155       Prefix            : String  := "  -> ";
 156       Minimum_Verbosity : Opt.Verbosity_Level_Type := Opt.Low);
 157    procedure Verbose_Msg
 158      (N1                : File_Name_Type;
 159       S1                : String;
 160       N2                : File_Name_Type := No_File;
 161       S2                : String  := "";
 162       Prefix            : String  := "  -> ";
 163       Minimum_Verbosity : Opt.Verbosity_Level_Type := Opt.Low);
 164    --  If the verbose flag (Verbose_Mode) is set and the verbosity level is at
 165    --  least equal to Minimum_Verbosity, then print Prefix to standard output
 166    --  followed by N1 and S1. If N2 /= No_Name then N2 is printed after S1. S2
 167    --  is printed last. Both N1 and N2 are printed in quotation marks. The two
 168    --  forms differ only in taking Name_Id or File_Name_Type arguments.
 169
 170    Max_Header_Num : constant := 6150;
 171    type Header_Num is range 0 .. Max_Header_Num;
 172    --  Size for hash table below. The upper bound is an arbitrary value, the
 173    --  value here was chosen after testing to determine a good compromise
 174    --  between speed of access and memory usage.
 175
 176    function Hash (Name : Name_Id)        return Header_Num;
 177    function Hash (Name : File_Name_Type) return Header_Num;
 178    function Hash (Name : Path_Name_Type) return Header_Num;
 179
 180    -------------------------
 181    -- Program termination --
 182    -------------------------
 183
 184    procedure Fail_Program
 185      (S              : String;
 186       Flush_Messages : Boolean := True);
 187    --  Terminate program with a message and a fatal status code
 188
 189    procedure Finish_Program
 190      (Exit_Code    : Osint.Exit_Code_Type := Osint.E_Success;
 191       S            : String := "");
 192    --  Terminate program, with or without a message, setting the status code
 193    --  according to Fatal. This properly removes all temporary files.
 194
 195    -----------
 196    -- Mains --
 197    -----------
 198
 199    --  Package Mains is used to store the mains specified on the command line
 200    --  and to retrieve them when a project file is used, to verify that the
 201    --  files exist and that they belong to a project file.
 202
 203    --  Mains are stored in a table. An index is used to retrieve the mains
 204    --  from the table.
 205
 206    type Main_Info is record
 207       File      : File_Name_Type;  --  Always canonical casing
 208       Index     : Int := 0;
 209    end record;
 210
 211    No_Main_Info : constant Main_Info := (No_File, 0);
 212
 213    package Mains is
 214       procedure Add_Main (Name : String; Index : Int := 0);
 215       --  Add one main to the table. This is in general used to add the main
 216       --  files specified on the command line. Index is used for multi-unit
 217       --  source files, and indicates which unit in the source is concerned.
 218
 219       procedure Delete;
 220       --  Empty the table
 221
 222       procedure Reset;
 223       --  Reset the cursor to the beginning of the table
 224
 225       procedure Set_Multi_Unit_Index
 226         (Index        : Int := 0);
 227       --  If a single main file was defined, this subprogram indicates which
 228       --  unit inside it is the main (case of a multi-unit source files).
 229       --  Errors are raised if zero or more than one main file was defined,
 230       --  and Index is non-zaero. This subprogram is used for the handling
 231       --  of the command line switch.
 232
 233       function Next_Main return String;
 234       function Next_Main return Main_Info;
 235       --  Moves the cursor forward and returns the new current entry. Returns
 236       --  No_Main_Info there are no more mains in the table.
 237
 238       function Number_Of_Mains return Natural;
 239       --  Returns the number of main.
 240
 241    end Mains;
 242
 243    -----------
 244    -- Queue --
 245    -----------
 246
 247    package Queue is
 248
 249       --  The queue of sources to be checked for compilation. There can be a
 250       --  single such queue per application.
 251
 252       type Source_Info is
 253          record
 254             File    : File_Name_Type := No_File;
 255             Unit    : Unit_Name_Type := No_Unit_Name;
 256             Index   : Int            := 0;
 257          end record;
 258       --  Information about files stored in the queue.
 259
 260       No_Source_Info : constant Source_Info := (No_File, No_Unit_Name, 0);
 261
 262       procedure Initialize (Force : Boolean := False);
 263       --  Initialize the queue
 264
 265       procedure Remove_Marks;
 266       --  Remove all marks set for the files. This means that the files will be
 267       --  handed to the compiler if they are added to the queue, and is mostly
 268       --  useful when recompiling several executables as the switches may be
 269       --  different and -s may be in use.
 270
 271       function Is_Empty return Boolean;
 272       --  Returns True if the queue is empty
 273
 274       procedure Insert (Source : Source_Info);
 275       function Insert (Source  : Source_Info) return Boolean;
 276       --  Insert source in the queue. The second version returns False if the
 277       --  Source was already marked in the queue.
 278
 279       procedure Extract
 280         (Found  : out Boolean;
 281          Source : out Source_Info);
 282       --  Get the first source that can be compiled from the queue. If no
 283       --  source may be compiled, sets Found to False. In this case, the value
 284       --  for Source is undefined.
 285
 286       function Size return Natural;
 287       --  Return the total size of the queue, including the sources already
 288       --  extracted.
 289
 290       function Processed return Natural;
 291       --  Return the number of source in the queue that have aready been
 292       --  processed.
 293
 294       function Element (Rank : Positive) return File_Name_Type;
 295       --  Get the file name for element of index Rank in the queue
 296
 297    end Queue;
 298
 299 end Make_Util;