gcc/ada/makeutl.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              M A K E U T L                               --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   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.  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 with ALI;      use ALI;
  27 with Debug;
  28 with Fname;
  29 with Osint;    use Osint;
  30 with Output;   use Output;
  31 with Opt;      use Opt;
  32 with Prj.Ext;
  33 with Prj.Util;
  34 with Snames;   use Snames;
  35 with Table;
  36
  37 with Ada.Command_Line;  use Ada.Command_Line;
  38
  39 with GNAT.Directory_Operations; use GNAT.Directory_Operations;
  40
  41 with System.Case_Util; use System.Case_Util;
  42 with System.HTable;
  43
  44 package body Makeutl is
  45
  46    type Mark_Key is record
  47       File  : File_Name_Type;
  48       Index : Int;
  49    end record;
  50    --  Identify either a mono-unit source (when Index = 0) or a specific unit
  51    --  (index = 1's origin index of unit) in a multi-unit source.
  52
  53    --  There follow many global undocumented declarations, comments needed ???
  54
  55    Max_Mask_Num : constant := 2048;
  56
  57    subtype Mark_Num is Union_Id range 0 .. Max_Mask_Num - 1;
  58
  59    function Hash (Key : Mark_Key) return Mark_Num;
  60
  61    package Marks is new System.HTable.Simple_HTable
  62      (Header_Num => Mark_Num,
  63       Element    => Boolean,
  64       No_Element => False,
  65       Key        => Mark_Key,
  66       Hash       => Hash,
  67       Equal      => "=");
  68    --  A hash table to keep tracks of the marked units
  69
  70    type Linker_Options_Data is record
  71       Project : Project_Id;
  72       Options : String_List_Id;
  73    end record;
  74
  75    Linker_Option_Initial_Count : constant := 20;
  76
  77    Linker_Options_Buffer : String_List_Access :=
  78      new String_List (1 .. Linker_Option_Initial_Count);
  79
  80    Last_Linker_Option : Natural := 0;
  81
  82    package Linker_Opts is new Table.Table (
  83      Table_Component_Type => Linker_Options_Data,
  84      Table_Index_Type     => Integer,
  85      Table_Low_Bound      => 1,
  86      Table_Initial        => 10,
  87      Table_Increment      => 100,
  88      Table_Name           => "Make.Linker_Opts");
  89
  90    procedure Add_Linker_Option (Option : String);
  91
  92    ---------
  93    -- Add --
  94    ---------
  95
  96    procedure Add
  97      (Option : String_Access;
  98       To     : in out String_List_Access;
  99       Last   : in out Natural)
 100    is
 101    begin
 102       if Last = To'Last then
 103          declare
 104             New_Options : constant String_List_Access :=
 105                             new String_List (1 .. To'Last * 2);
 106
 107          begin
 108             New_Options (To'Range) := To.all;
 109
 110             --  Set all elements of the original options to null to avoid
 111             --  deallocation of copies.
 112
 113             To.all := (others => null);
 114
 115             Free (To);
 116             To := New_Options;
 117          end;
 118       end if;
 119
 120       Last := Last + 1;
 121       To (Last) := Option;
 122    end Add;
 123
 124    procedure Add
 125      (Option : String;
 126       To     : in out String_List_Access;
 127       Last   : in out Natural)
 128    is
 129    begin
 130       Add (Option => new String'(Option), To => To, Last => Last);
 131    end Add;
 132
 133    -----------------------
 134    -- Add_Linker_Option --
 135    -----------------------
 136
 137    procedure Add_Linker_Option (Option : String) is
 138    begin
 139       if Option'Length > 0 then
 140          if Last_Linker_Option = Linker_Options_Buffer'Last then
 141             declare
 142                New_Buffer : constant String_List_Access :=
 143                               new String_List
 144                                 (1 .. Linker_Options_Buffer'Last +
 145                                         Linker_Option_Initial_Count);
 146             begin
 147                New_Buffer (Linker_Options_Buffer'Range) :=
 148                  Linker_Options_Buffer.all;
 149                Linker_Options_Buffer.all := (others => null);
 150                Free (Linker_Options_Buffer);
 151                Linker_Options_Buffer := New_Buffer;
 152             end;
 153          end if;
 154
 155          Last_Linker_Option := Last_Linker_Option + 1;
 156          Linker_Options_Buffer (Last_Linker_Option) := new String'(Option);
 157       end if;
 158    end Add_Linker_Option;
 159
 160    -------------------------
 161    -- Base_Name_Index_For --
 162    -------------------------
 163
 164    function Base_Name_Index_For
 165      (Main            : String;
 166       Main_Index      : Int;
 167       Index_Separator : Character) return File_Name_Type
 168    is
 169       Result : File_Name_Type;
 170
 171    begin
 172       Name_Len := 0;
 173       Add_Str_To_Name_Buffer (Base_Name (Main));
 174
 175       --  Remove the extension, if any, that is the last part of the base name
 176       --  starting with a dot and following some characters.
 177
 178       for J in reverse 2 .. Name_Len loop
 179          if Name_Buffer (J) = '.' then
 180             Name_Len := J - 1;
 181             exit;
 182          end if;
 183       end loop;
 184
 185       --  Add the index info, if index is different from 0
 186
 187       if Main_Index > 0 then
 188          Add_Char_To_Name_Buffer (Index_Separator);
 189
 190          declare
 191             Img : constant String := Main_Index'Img;
 192          begin
 193             Add_Str_To_Name_Buffer (Img (2 .. Img'Last));
 194          end;
 195       end if;
 196
 197       Result := Name_Find;
 198       return Result;
 199    end Base_Name_Index_For;
 200
 201    ------------------------------
 202    -- Check_Source_Info_In_ALI --
 203    ------------------------------
 204
 205    function Check_Source_Info_In_ALI (The_ALI : ALI_Id) return Boolean is
 206       Unit_Name : Name_Id;
 207
 208    begin
 209       --  Loop through units
 210
 211       for U in ALIs.Table (The_ALI).First_Unit ..
 212                ALIs.Table (The_ALI).Last_Unit
 213       loop
 214          --  Check if the file name is one of the source of the unit
 215
 216          Get_Name_String (Units.Table (U).Uname);
 217          Name_Len  := Name_Len - 2;
 218          Unit_Name := Name_Find;
 219
 220          if File_Not_A_Source_Of (Unit_Name, Units.Table (U).Sfile) then
 221             return False;
 222          end if;
 223
 224          --  Loop to do same check for each of the withed units
 225
 226          for W in Units.Table (U).First_With .. Units.Table (U).Last_With loop
 227             declare
 228                WR : ALI.With_Record renames Withs.Table (W);
 229
 230             begin
 231                if WR.Sfile /= No_File then
 232                   Get_Name_String (WR.Uname);
 233                   Name_Len  := Name_Len - 2;
 234                   Unit_Name := Name_Find;
 235
 236                   if File_Not_A_Source_Of (Unit_Name, WR.Sfile) then
 237                      return False;
 238                   end if;
 239                end if;
 240             end;
 241          end loop;
 242       end loop;
 243
 244       --  Loop to check subunits
 245
 246       for D in ALIs.Table (The_ALI).First_Sdep ..
 247                ALIs.Table (The_ALI).Last_Sdep
 248       loop
 249          declare
 250             SD : Sdep_Record renames Sdep.Table (D);
 251
 252          begin
 253             Unit_Name := SD.Subunit_Name;
 254
 255             if Unit_Name /= No_Name then
 256
 257                --  For separates, the file is no longer associated with the
 258                --  unit ("proc-sep.adb" is not associated with unit "proc.sep")
 259                --  so we need to check whether the source file still exists in
 260                --  the source tree: it will if it matches the naming scheme
 261                --  (and then will be for the same unit).
 262
 263                if Find_Source
 264                     (In_Tree   => Project_Tree,
 265                      Project   => No_Project,
 266                      Base_Name => SD.Sfile) = No_Source
 267                then
 268                   --  If this is not a runtime file or if, when gnatmake switch
 269                   --  -a is used, we are not able to find this subunit in the
 270                   --  source directories, then recompilation is needed.
 271
 272                   if not Fname.Is_Internal_File_Name (SD.Sfile)
 273                     or else
 274                       (Check_Readonly_Files
 275                         and then Full_Source_Name (SD.Sfile) = No_File)
 276                   then
 277                      if Verbose_Mode then
 278                         Write_Line
 279                           ("While parsing ALI file, file "
 280                            & Get_Name_String (SD.Sfile)
 281                            & " is indicated as containing subunit "
 282                            & Get_Name_String (Unit_Name)
 283                            & " but this does not match what was found while"
 284                            & " parsing the project. Will recompile");
 285                      end if;
 286
 287                      return False;
 288                   end if;
 289                end if;
 290             end if;
 291          end;
 292       end loop;
 293
 294       return True;
 295    end Check_Source_Info_In_ALI;
 296
 297    -----------------
 298    -- Create_Name --
 299    -----------------
 300
 301    function Create_Name (Name : String) return File_Name_Type is
 302    begin
 303       Name_Len := 0;
 304       Add_Str_To_Name_Buffer (Name);
 305       return Name_Find;
 306    end Create_Name;
 307
 308    function Create_Name (Name : String) return Name_Id is
 309    begin
 310       Name_Len := 0;
 311       Add_Str_To_Name_Buffer (Name);
 312       return Name_Find;
 313    end Create_Name;
 314
 315    function Create_Name (Name : String) return Path_Name_Type is
 316    begin
 317       Name_Len := 0;
 318       Add_Str_To_Name_Buffer (Name);
 319       return Name_Find;
 320    end Create_Name;
 321
 322    ----------------------
 323    -- Delete_All_Marks --
 324    ----------------------
 325
 326    procedure Delete_All_Marks is
 327    begin
 328       Marks.Reset;
 329    end Delete_All_Marks;
 330
 331    ----------------------------
 332    -- Executable_Prefix_Path --
 333    ----------------------------
 334
 335    function Executable_Prefix_Path return String is
 336       Exec_Name : constant String := Command_Name;
 337
 338       function Get_Install_Dir (S : String) return String;
 339       --  S is the executable name preceded by the absolute or relative path,
 340       --  e.g. "c:\usr\bin\gcc.exe". Returns the absolute directory where "bin"
 341       --  lies (in the example "C:\usr"). If the executable is not in a "bin"
 342       --  directory, return "".
 343
 344       ---------------------
 345       -- Get_Install_Dir --
 346       ---------------------
 347
 348       function Get_Install_Dir (S : String) return String is
 349          Exec      : String  := S;
 350          Path_Last : Integer := 0;
 351
 352       begin
 353          for J in reverse Exec'Range loop
 354             if Exec (J) = Directory_Separator then
 355                Path_Last := J - 1;
 356                exit;
 357             end if;
 358          end loop;
 359
 360          if Path_Last >= Exec'First + 2 then
 361             To_Lower (Exec (Path_Last - 2 .. Path_Last));
 362          end if;
 363
 364          if Path_Last < Exec'First + 2
 365            or else Exec (Path_Last - 2 .. Path_Last) /= "bin"
 366            or else (Path_Last - 3 >= Exec'First
 367                      and then Exec (Path_Last - 3) /= Directory_Separator)
 368          then
 369             return "";
 370          end if;
 371
 372          return Normalize_Pathname
 373                   (Exec (Exec'First .. Path_Last - 4),
 374                    Resolve_Links => Opt.Follow_Links_For_Dirs)
 375            & Directory_Separator;
 376       end Get_Install_Dir;
 377
 378    --  Beginning of Executable_Prefix_Path
 379
 380    begin
 381       --  First determine if a path prefix was placed in front of the
 382       --  executable name.
 383
 384       for J in reverse Exec_Name'Range loop
 385          if Exec_Name (J) = Directory_Separator then
 386             return Get_Install_Dir (Exec_Name);
 387          end if;
 388       end loop;
 389
 390       --  If we get here, the user has typed the executable name with no
 391       --  directory prefix.
 392
 393       declare
 394          Path : String_Access := Locate_Exec_On_Path (Exec_Name);
 395       begin
 396          if Path = null then
 397             return "";
 398          else
 399             declare
 400                Dir : constant String := Get_Install_Dir (Path.all);
 401             begin
 402                Free (Path);
 403                return Dir;
 404             end;
 405          end if;
 406       end;
 407    end Executable_Prefix_Path;
 408
 409    --------------------------
 410    -- File_Not_A_Source_Of --
 411    --------------------------
 412
 413    function File_Not_A_Source_Of
 414      (Uname : Name_Id;
 415       Sfile : File_Name_Type) return Boolean
 416    is
 417       Unit : constant Unit_Index :=
 418                Units_Htable.Get (Project_Tree.Units_HT, Uname);
 419
 420       At_Least_One_File : Boolean := False;
 421
 422    begin
 423       if Unit /= No_Unit_Index then
 424          for F in Unit.File_Names'Range loop
 425             if Unit.File_Names (F) /= null then
 426                At_Least_One_File := True;
 427                if Unit.File_Names (F).File = Sfile then
 428                   return False;
 429                end if;
 430             end if;
 431          end loop;
 432
 433          if not At_Least_One_File then
 434
 435             --  The unit was probably created initially for a separate unit
 436             --  (which are initially created as IMPL when both suffixes are the
 437             --  same). Later on, Override_Kind changed the type of the file,
 438             --  and the unit is no longer valid in fact.
 439
 440             return False;
 441          end if;
 442
 443          Verbose_Msg (Uname, "sources do not include ", Name_Id (Sfile));
 444          return True;
 445       end if;
 446
 447       return False;
 448    end File_Not_A_Source_Of;
 449
 450    ----------
 451    -- Hash --
 452    ----------
 453
 454    function Hash (Key : Mark_Key) return Mark_Num is
 455    begin
 456       return Union_Id (Key.File) mod Max_Mask_Num;
 457    end Hash;
 458
 459    ------------
 460    -- Inform --
 461    ------------
 462
 463    procedure Inform (N : File_Name_Type; Msg : String) is
 464    begin
 465       Inform (Name_Id (N), Msg);
 466    end Inform;
 467
 468    procedure Inform (N : Name_Id := No_Name; Msg : String) is
 469    begin
 470       Osint.Write_Program_Name;
 471
 472       Write_Str (": ");
 473
 474       if N /= No_Name then
 475          Write_Str ("""");
 476
 477          declare
 478             Name : constant String := Get_Name_String (N);
 479          begin
 480             if Debug.Debug_Flag_F and then Is_Absolute_Path (Name) then
 481                Write_Str (File_Name (Name));
 482             else
 483                Write_Str (Name);
 484             end if;
 485          end;
 486
 487          Write_Str (""" ");
 488       end if;
 489
 490       Write_Str (Msg);
 491       Write_Eol;
 492    end Inform;
 493
 494    ----------------------------
 495    -- Is_External_Assignment --
 496    ----------------------------
 497
 498    function Is_External_Assignment
 499      (Tree : Prj.Tree.Project_Node_Tree_Ref;
 500       Argv : String) return Boolean
 501    is
 502       Start     : Positive := 3;
 503       Finish    : Natural := Argv'Last;
 504
 505       pragma Assert (Argv'First = 1);
 506       pragma Assert (Argv (1 .. 2) = "-X");
 507
 508    begin
 509       if Argv'Last < 5 then
 510          return False;
 511
 512       elsif Argv (3) = '"' then
 513          if Argv (Argv'Last) /= '"' or else Argv'Last < 7 then
 514             return False;
 515          else
 516             Start := 4;
 517             Finish := Argv'Last - 1;
 518          end if;
 519       end if;
 520
 521       return Prj.Ext.Check
 522         (Tree        => Tree,
 523          Declaration => Argv (Start .. Finish));
 524    end Is_External_Assignment;
 525
 526    ---------------
 527    -- Is_Marked --
 528    ---------------
 529
 530    function Is_Marked
 531      (Source_File : File_Name_Type;
 532       Index       : Int := 0) return Boolean
 533    is
 534    begin
 535       return Marks.Get (K => (File => Source_File, Index => Index));
 536    end Is_Marked;
 537
 538    -----------------------------
 539    -- Linker_Options_Switches --
 540    -----------------------------
 541
 542    function Linker_Options_Switches
 543      (Project  : Project_Id;
 544       In_Tree  : Project_Tree_Ref) return String_List
 545    is
 546       procedure Recursive_Add (Proj : Project_Id; Dummy : in out Boolean);
 547       --  The recursive routine used to add linker options
 548
 549       -------------------
 550       -- Recursive_Add --
 551       -------------------
 552
 553       procedure Recursive_Add (Proj : Project_Id; Dummy : in out Boolean) is
 554          pragma Unreferenced (Dummy);
 555
 556          Linker_Package : Package_Id;
 557          Options        : Variable_Value;
 558
 559       begin
 560          Linker_Package :=
 561            Prj.Util.Value_Of
 562              (Name        => Name_Linker,
 563               In_Packages => Proj.Decl.Packages,
 564               In_Tree     => In_Tree);
 565
 566          Options :=
 567            Prj.Util.Value_Of
 568              (Name                    => Name_Ada,
 569               Index                   => 0,
 570               Attribute_Or_Array_Name => Name_Linker_Options,
 571               In_Package              => Linker_Package,
 572               In_Tree                 => In_Tree);
 573
 574          --  If attribute is present, add the project with
 575          --  the attribute to table Linker_Opts.
 576
 577          if Options /= Nil_Variable_Value then
 578             Linker_Opts.Increment_Last;
 579             Linker_Opts.Table (Linker_Opts.Last) :=
 580               (Project => Proj, Options => Options.Values);
 581          end if;
 582       end Recursive_Add;
 583
 584       procedure For_All_Projects is
 585         new For_Every_Project_Imported (Boolean, Recursive_Add);
 586
 587       Dummy : Boolean := False;
 588
 589    --  Start of processing for Linker_Options_Switches
 590
 591    begin
 592       Linker_Opts.Init;
 593
 594       For_All_Projects (Project, Dummy, Imported_First => True);
 595
 596       Last_Linker_Option := 0;
 597
 598       for Index in reverse 1 .. Linker_Opts.Last loop
 599          declare
 600             Options : String_List_Id;
 601             Proj    : constant Project_Id :=
 602                         Linker_Opts.Table (Index).Project;
 603             Option  : Name_Id;
 604             Dir_Path : constant String :=
 605                          Get_Name_String (Proj.Directory.Name);
 606
 607          begin
 608             Options := Linker_Opts.Table (Index).Options;
 609             while Options /= Nil_String loop
 610                Option := In_Tree.String_Elements.Table (Options).Value;
 611                Get_Name_String (Option);
 612
 613                --  Do not consider empty linker options
 614
 615                if Name_Len /= 0 then
 616                   Add_Linker_Option (Name_Buffer (1 .. Name_Len));
 617
 618                   --  Object files and -L switches specified with relative
 619                   --  paths must be converted to absolute paths.
 620
 621                   Test_If_Relative_Path
 622                     (Switch => Linker_Options_Buffer (Last_Linker_Option),
 623                      Parent => Dir_Path,
 624                      Including_L_Switch => True);
 625                end if;
 626
 627                Options := In_Tree.String_Elements.Table (Options).Next;
 628             end loop;
 629          end;
 630       end loop;
 631
 632       return Linker_Options_Buffer (1 .. Last_Linker_Option);
 633    end Linker_Options_Switches;
 634
 635    -----------
 636    -- Mains --
 637    -----------
 638
 639    package body Mains is
 640
 641       type File_And_Loc is record
 642          File_Name : File_Name_Type;
 643          Index     : Int := 0;
 644          Location  : Source_Ptr := No_Location;
 645       end record;
 646
 647       package Names is new Table.Table
 648         (Table_Component_Type => File_And_Loc,
 649          Table_Index_Type     => Integer,
 650          Table_Low_Bound      => 1,
 651          Table_Initial        => 10,
 652          Table_Increment      => 100,
 653          Table_Name           => "Makeutl.Mains.Names");
 654       --  The table that stores the mains
 655
 656       Current : Natural := 0;
 657       --  The index of the last main retrieved from the table
 658
 659       --------------
 660       -- Add_Main --
 661       --------------
 662
 663       procedure Add_Main (Name : String) is
 664       begin
 665          Name_Len := 0;
 666          Add_Str_To_Name_Buffer (Name);
 667          Names.Increment_Last;
 668          Names.Table (Names.Last) := (Name_Find, 0, No_Location);
 669       end Add_Main;
 670
 671       ------------
 672       -- Delete --
 673       ------------
 674
 675       procedure Delete is
 676       begin
 677          Names.Set_Last (0);
 678          Mains.Reset;
 679       end Delete;
 680
 681       ---------------
 682       -- Get_Index --
 683       ---------------
 684
 685       function Get_Index return Int is
 686       begin
 687          if Current in Names.First .. Names.Last then
 688             return Names.Table (Current).Index;
 689          else
 690             return 0;
 691          end if;
 692       end Get_Index;
 693
 694       ------------------
 695       -- Get_Location --
 696       ------------------
 697
 698       function Get_Location return Source_Ptr is
 699       begin
 700          if Current in Names.First .. Names.Last then
 701             return Names.Table (Current).Location;
 702          else
 703             return No_Location;
 704          end if;
 705       end Get_Location;
 706
 707       ---------------
 708       -- Next_Main --
 709       ---------------
 710
 711       function Next_Main return String is
 712       begin
 713          if Current >= Names.Last then
 714             return "";
 715          else
 716             Current := Current + 1;
 717             return Get_Name_String (Names.Table (Current).File_Name);
 718          end if;
 719       end Next_Main;
 720
 721       ---------------------
 722       -- Number_Of_Mains --
 723       ---------------------
 724
 725       function Number_Of_Mains return Natural is
 726       begin
 727          return Names.Last;
 728       end Number_Of_Mains;
 729
 730       -----------
 731       -- Reset --
 732       -----------
 733
 734       procedure Reset is
 735       begin
 736          Current := 0;
 737       end Reset;
 738
 739       ---------------
 740       -- Set_Index --
 741       ---------------
 742
 743       procedure Set_Index (Index : Int) is
 744       begin
 745          if Names.Last > 0 then
 746             Names.Table (Names.Last).Index := Index;
 747          end if;
 748       end Set_Index;
 749
 750       ------------------
 751       -- Set_Location --
 752       ------------------
 753
 754       procedure Set_Location (Location : Source_Ptr) is
 755       begin
 756          if Names.Last > 0 then
 757             Names.Table (Names.Last).Location := Location;
 758          end if;
 759       end Set_Location;
 760
 761       -----------------
 762       -- Update_Main --
 763       -----------------
 764
 765       procedure Update_Main (Name : String) is
 766       begin
 767          if Current in Names.First .. Names.Last then
 768             Name_Len := 0;
 769             Add_Str_To_Name_Buffer (Name);
 770             Names.Table (Current).File_Name := Name_Find;
 771          end if;
 772       end Update_Main;
 773    end Mains;
 774
 775    ----------
 776    -- Mark --
 777    ----------
 778
 779    procedure Mark (Source_File : File_Name_Type; Index : Int := 0) is
 780    begin
 781       Marks.Set (K => (File => Source_File, Index => Index), E => True);
 782    end Mark;
 783
 784    -----------------------
 785    -- Path_Or_File_Name --
 786    -----------------------
 787
 788    function Path_Or_File_Name (Path : Path_Name_Type) return String is
 789       Path_Name : constant String := Get_Name_String (Path);
 790    begin
 791       if Debug.Debug_Flag_F then
 792          return File_Name (Path_Name);
 793       else
 794          return Path_Name;
 795       end if;
 796    end Path_Or_File_Name;
 797
 798    ---------------------------
 799    -- Test_If_Relative_Path --
 800    ---------------------------
 801
 802    procedure Test_If_Relative_Path
 803      (Switch               : in out String_Access;
 804       Parent               : String;
 805       Including_L_Switch   : Boolean := True;
 806       Including_Non_Switch : Boolean := True;
 807       Including_RTS        : Boolean := False)
 808    is
 809    begin
 810       if Switch /= null then
 811          declare
 812             Sw    : String (1 .. Switch'Length);
 813             Start : Positive;
 814
 815          begin
 816             Sw := Switch.all;
 817
 818             if Sw (1) = '-' then
 819                if Sw'Length >= 3
 820                  and then (Sw (2) = 'A'
 821                             or else Sw (2) = 'I'
 822                             or else (Including_L_Switch and then Sw (2) = 'L'))
 823                then
 824                   Start := 3;
 825
 826                   if Sw = "-I-" then
 827                      return;
 828                   end if;
 829
 830                elsif Sw'Length >= 4
 831                  and then (Sw (2 .. 3) = "aL"
 832                             or else Sw (2 .. 3) = "aO"
 833                             or else Sw (2 .. 3) = "aI")
 834                then
 835                   Start := 4;
 836
 837                elsif Including_RTS
 838                  and then Sw'Length >= 7
 839                  and then Sw (2 .. 6) = "-RTS="
 840                then
 841                   Start := 7;
 842
 843                else
 844                   return;
 845                end if;
 846
 847                --  Because relative path arguments to --RTS= may be relative
 848                --  to the search directory prefix, those relative path
 849                --  arguments are converted only when they include directory
 850                --  information.
 851
 852                if not Is_Absolute_Path (Sw (Start .. Sw'Last)) then
 853                   if Parent'Length = 0 then
 854                      Do_Fail
 855                        ("relative search path switches ("""
 856                         & Sw
 857                         & """) are not allowed");
 858
 859                   elsif Including_RTS then
 860                      for J in Start .. Sw'Last loop
 861                         if Sw (J) = Directory_Separator then
 862                            Switch :=
 863                              new String'
 864                                (Sw (1 .. Start - 1) &
 865                                 Parent &
 866                                 Directory_Separator &
 867                                 Sw (Start .. Sw'Last));
 868                            return;
 869                         end if;
 870                      end loop;
 871
 872                   else
 873                      Switch :=
 874                        new String'
 875                          (Sw (1 .. Start - 1) &
 876                           Parent &
 877                           Directory_Separator &
 878                           Sw (Start .. Sw'Last));
 879                   end if;
 880                end if;
 881
 882             elsif Including_Non_Switch then
 883                if not Is_Absolute_Path (Sw) then
 884                   if Parent'Length = 0 then
 885                      Do_Fail
 886                        ("relative paths (""" & Sw & """) are not allowed");
 887                   else
 888                      Switch := new String'(Parent & Directory_Separator & Sw);
 889                   end if;
 890                end if;
 891             end if;
 892          end;
 893       end if;
 894    end Test_If_Relative_Path;
 895
 896    -------------------
 897    -- Unit_Index_Of --
 898    -------------------
 899
 900    function Unit_Index_Of (ALI_File : File_Name_Type) return Int is
 901       Start  : Natural;
 902       Finish : Natural;
 903       Result : Int := 0;
 904
 905    begin
 906       Get_Name_String (ALI_File);
 907
 908       --  First, find the last dot
 909
 910       Finish := Name_Len;
 911
 912       while Finish >= 1 and then Name_Buffer (Finish) /= '.' loop
 913          Finish := Finish - 1;
 914       end loop;
 915
 916       if Finish = 1 then
 917          return 0;
 918       end if;
 919
 920       --  Now check that the dot is preceded by digits
 921
 922       Start := Finish;
 923       Finish := Finish - 1;
 924
 925       while Start >= 1 and then Name_Buffer (Start - 1) in '0' .. '9' loop
 926          Start := Start - 1;
 927       end loop;
 928
 929       --  If there are no digits, or if the digits are not preceded by the
 930       --  character that precedes a unit index, this is not the ALI file of
 931       --  a unit in a multi-unit source.
 932
 933       if Start > Finish
 934         or else Start = 1
 935         or else Name_Buffer (Start - 1) /= Multi_Unit_Index_Character
 936       then
 937          return 0;
 938       end if;
 939
 940       --  Build the index from the digit(s)
 941
 942       while Start <= Finish loop
 943          Result := Result * 10 +
 944                      Character'Pos (Name_Buffer (Start)) - Character'Pos ('0');
 945          Start := Start + 1;
 946       end loop;
 947
 948       return Result;
 949    end Unit_Index_Of;
 950
 951    -----------------
 952    -- Verbose_Msg --
 953    -----------------
 954
 955    procedure Verbose_Msg
 956      (N1                : Name_Id;
 957       S1                : String;
 958       N2                : Name_Id := No_Name;
 959       S2                : String  := "";
 960       Prefix            : String := "  -> ";
 961       Minimum_Verbosity : Opt.Verbosity_Level_Type := Opt.Low)
 962    is
 963    begin
 964       if not Opt.Verbose_Mode
 965         or else Minimum_Verbosity > Opt.Verbosity_Level
 966       then
 967          return;
 968       end if;
 969
 970       Write_Str (Prefix);
 971       Write_Str ("""");
 972       Write_Name (N1);
 973       Write_Str (""" ");
 974       Write_Str (S1);
 975
 976       if N2 /= No_Name then
 977          Write_Str (" """);
 978          Write_Name (N2);
 979          Write_Str (""" ");
 980       end if;
 981
 982       Write_Str (S2);
 983       Write_Eol;
 984    end Verbose_Msg;
 985
 986    procedure Verbose_Msg
 987      (N1                : File_Name_Type;
 988       S1                : String;
 989       N2                : File_Name_Type := No_File;
 990       S2                : String  := "";
 991       Prefix            : String := "  -> ";
 992       Minimum_Verbosity : Opt.Verbosity_Level_Type := Opt.Low)
 993    is
 994    begin
 995       Verbose_Msg
 996         (Name_Id (N1), S1, Name_Id (N2), S2, Prefix, Minimum_Verbosity);
 997    end Verbose_Msg;
 998
 999 end Makeutl;