gcc/ada/prj.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                                  P R J                                   --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2001-2008, 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 --  The following package declares the data types for GNAT project.
  27 --  These data types may be used by GNAT Project-aware tools.
  28
  29 --  Children of these package implements various services on these data types.
  30 --  See in particular Prj.Pars and Prj.Env.
  31
  32 with Casing; use Casing;
  33 with Namet;  use Namet;
  34 with Scans;  use Scans;
  35 with Types;  use Types;
  36
  37 with GNAT.Dynamic_HTables; use GNAT.Dynamic_HTables;
  38 with GNAT.Dynamic_Tables;
  39 with GNAT.OS_Lib;          use GNAT.OS_Lib;
  40
  41 package Prj is
  42
  43    All_Other_Names : constant Name_Id := Names_High_Bound;
  44    --  Name used to replace others as an index of an associative array
  45    --  attribute in situations where this is allowed.
  46
  47    Subdirs_Option : constant String := "--subdirs=";
  48    --  Switch used to indicate that the real directories (object, exec,
  49    --  library, ...) are subdirectories of those in the project file.
  50
  51    Subdirs : String_Ptr := null;
  52    --  The value after the equal sign in switch --subdirs=...
  53    --  Contains the relative subdirectory.
  54
  55    type Library_Support is (None, Static_Only, Full);
  56    --  Support for Library Project File.
  57    --  - None: Library Project Files are not supported at all
  58    --  - Static_Only: Library Project Files are only supported for static
  59    --    libraries.
  60    --  - Full: Library Project Files are supported for static and dynamic
  61    --    (shared) libraries.
  62
  63    type Yes_No_Unknown is (Yes, No, Unknown);
  64    --  Tri-state to decide if -lgnarl is needed when linking
  65
  66    type Mode is (Multi_Language, Ada_Only);
  67    --  Ada_Only: mode for gnatmake, gnatclean, gnatname, the GNAT driver
  68    --  Multi_Language: mode for gprbuild, gprclean
  69
  70    type Project_Qualifier is
  71      (Unspecified,
  72       Standard,
  73       Library,
  74       Dry,
  75       Aggregate,
  76       Aggregate_Library);
  77    --  Qualifiers that can prefix the reserved word "project" in a project
  78    --  file:
  79    --    Standard:             standard project ...
  80    --    Library:              library project is ...
  81    --    Dry:                  abstract project is
  82    --    Aggregate:            aggregate project is
  83    --    Aggregate_Library:    aggregate library project is ...
  84
  85    function Get_Mode return Mode;
  86    pragma Inline (Get_Mode);
  87
  88    procedure Set_Mode (New_Mode : Mode);
  89    pragma Inline (Set_Mode);
  90
  91    Default_Language_Is_Ada : Boolean := True;
  92    --  If no language was defined in the project or the configuration file, it
  93    --  is an error, unless this variable is True, in which case it defaults to
  94    --  Ada. Calling Set_Mode will reset this variable, default is for Ada_Only.
  95
  96    Must_Check_Configuration : Boolean := False;
  97    --  True when the contents of the configuration file must be checked. This
  98    --  is in general only needed by gprbuild itself, since other applications
  99    --  can ignore such errors when they don't need to build directly. Calling
 100    --  Set_Mode will reset this variable, default is for Ada_Only.
 101
 102    function In_Configuration return Boolean;
 103    pragma Inline (In_Configuration);
 104
 105    procedure Set_In_Configuration (Value : Boolean);
 106    pragma Inline (Set_In_Configuration);
 107
 108    All_Packages : constant String_List_Access;
 109    --  Default value of parameter Packages of procedures Parse, in Prj.Pars and
 110    --  Prj.Part, indicating that all packages should be checked.
 111
 112    type Project_Tree_Data;
 113    type Project_Tree_Ref is access all Project_Tree_Data;
 114    --  Reference to a project tree. Several project trees may exist in memory
 115    --  at the same time.
 116
 117    No_Project_Tree : constant Project_Tree_Ref;
 118
 119    function Default_Ada_Spec_Suffix return File_Name_Type;
 120    pragma Inline (Default_Ada_Spec_Suffix);
 121    --  The name for the standard GNAT suffix for Ada spec source file name
 122    --  ".ads". Initialized by Prj.Initialize.
 123
 124    function Default_Ada_Body_Suffix return File_Name_Type;
 125    pragma Inline (Default_Ada_Body_Suffix);
 126    --  The name for the standard GNAT suffix for Ada body source file name
 127    --  ".adb". Initialized by Prj.Initialize.
 128
 129    function Slash return Path_Name_Type;
 130    pragma Inline (Slash);
 131    --  "/", used as the path of locally removed files
 132
 133    Config_Project_File_Extension : String := ".cgpr";
 134    Project_File_Extension : String := ".gpr";
 135    --  The standard config and user project file name extensions. They are not
 136    --  constants, because Canonical_Case_File_Name is called on these variables
 137    --  in the body of Prj.
 138
 139    type Error_Warning is (Silent, Warning, Error);
 140    --  Severity of some situations, such as: no Ada sources in a project where
 141    --  Ada is one of the language.
 142    --
 143    --  When the situation occurs, the behaviour depends on the setting:
 144    --
 145    --    - Silent:  no action
 146    --    - Warning: issue a warning, does not cause the tool to fail
 147    --    - Error:   issue an error, causes the tool to fail
 148
 149    function Empty_File   return File_Name_Type;
 150    function Empty_String return Name_Id;
 151    --  Return the id for an empty string ""
 152
 153    type Path_Information is record
 154       Name         : Path_Name_Type := No_Path;
 155       Display_Name : Path_Name_Type := No_Path;
 156    end record;
 157
 158    No_Path_Information : constant Path_Information := (No_Path, No_Path);
 159
 160    type Project_Id is new Nat;
 161    No_Project : constant Project_Id := 0;
 162    --  Id of a Project File
 163
 164    type String_List_Id is new Nat;
 165    Nil_String : constant String_List_Id := 0;
 166    type String_Element is record
 167       Value         : Name_Id        := No_Name;
 168       Index         : Int            := 0;
 169       Display_Value : Name_Id        := No_Name;
 170       Location      : Source_Ptr     := No_Location;
 171       Flag          : Boolean        := False;
 172       Next          : String_List_Id := Nil_String;
 173    end record;
 174    --  To hold values for string list variables and array elements.
 175    --  Component Flag may be used for various purposes. For source
 176    --  directories, it indicates if the directory contains Ada source(s).
 177
 178    package String_Element_Table is new GNAT.Dynamic_Tables
 179      (Table_Component_Type => String_Element,
 180       Table_Index_Type     => String_List_Id,
 181       Table_Low_Bound      => 1,
 182       Table_Initial        => 200,
 183       Table_Increment      => 100);
 184    --  The table for string elements in string lists
 185
 186    type Variable_Kind is (Undefined, List, Single);
 187    --  Different kinds of variables
 188
 189    subtype Defined_Variable_Kind is Variable_Kind range List .. Single;
 190    --  The defined kinds of variables
 191
 192    Ignored : constant Variable_Kind;
 193    --  Used to indicate that a package declaration must be ignored
 194    --  while processing the project tree (unknown package name).
 195
 196    type Variable_Value (Kind : Variable_Kind := Undefined) is record
 197       Project  : Project_Id := No_Project;
 198       Location : Source_Ptr := No_Location;
 199       Default  : Boolean    := False;
 200       case Kind is
 201          when Undefined =>
 202             null;
 203          when List =>
 204             Values : String_List_Id := Nil_String;
 205          when Single =>
 206             Value : Name_Id := No_Name;
 207             Index : Int     := 0;
 208       end case;
 209    end record;
 210    --  Values for variables and array elements. Default is True if the
 211    --  current value is the default one for the variable
 212
 213    Nil_Variable_Value : constant Variable_Value;
 214    --  Value of a non existing variable or array element
 215
 216    type Variable_Id is new Nat;
 217    No_Variable : constant Variable_Id := 0;
 218    type Variable is record
 219       Next  : Variable_Id := No_Variable;
 220       Name  : Name_Id;
 221       Value : Variable_Value;
 222    end record;
 223    --  To hold the list of variables in a project file and in packages
 224
 225    package Variable_Element_Table is new GNAT.Dynamic_Tables
 226      (Table_Component_Type => Variable,
 227       Table_Index_Type     => Variable_Id,
 228       Table_Low_Bound      => 1,
 229       Table_Initial        => 200,
 230       Table_Increment      => 100);
 231    --  The table of variable in list of variables
 232
 233    type Array_Element_Id is new Nat;
 234    No_Array_Element : constant Array_Element_Id := 0;
 235    type Array_Element is record
 236       Index                : Name_Id;
 237       Src_Index            : Int := 0;
 238       Index_Case_Sensitive : Boolean := True;
 239       Value                : Variable_Value;
 240       Next                 : Array_Element_Id := No_Array_Element;
 241    end record;
 242    --  Each Array_Element represents an array element and is linked (Next)
 243    --  to the next array element, if any, in the array.
 244
 245    package Array_Element_Table is new GNAT.Dynamic_Tables
 246      (Table_Component_Type => Array_Element,
 247       Table_Index_Type     => Array_Element_Id,
 248       Table_Low_Bound      => 1,
 249       Table_Initial        => 200,
 250       Table_Increment      => 100);
 251    --  The table that contains all array elements
 252
 253    type Array_Id is new Nat;
 254    No_Array : constant Array_Id := 0;
 255    type Array_Data is record
 256       Name     : Name_Id          := No_Name;
 257       Location : Source_Ptr       := No_Location;
 258       Value    : Array_Element_Id := No_Array_Element;
 259       Next     : Array_Id         := No_Array;
 260    end record;
 261    --  Each Array_Data value represents an array.
 262    --  Value is the id of the first element.
 263    --  Next is the id of the next array in the project file or package.
 264
 265    package Array_Table is new GNAT.Dynamic_Tables
 266      (Table_Component_Type => Array_Data,
 267       Table_Index_Type     => Array_Id,
 268       Table_Low_Bound      => 1,
 269       Table_Initial        => 200,
 270       Table_Increment      => 100);
 271    --  The table that contains all arrays
 272
 273    type Package_Id is new Nat;
 274    No_Package : constant Package_Id := 0;
 275    type Declarations is record
 276       Variables  : Variable_Id := No_Variable;
 277       Attributes : Variable_Id := No_Variable;
 278       Arrays     : Array_Id    := No_Array;
 279       Packages   : Package_Id  := No_Package;
 280    end record;
 281    --  Contains the declarations (variables, single and array attributes,
 282    --  packages) for a project or a package in a project.
 283
 284    No_Declarations : constant Declarations :=
 285      (Variables  => No_Variable,
 286       Attributes => No_Variable,
 287       Arrays     => No_Array,
 288       Packages   => No_Package);
 289    --  Default value of Declarations: indicates that there is no declarations
 290
 291    type Package_Element is record
 292       Name   : Name_Id      := No_Name;
 293       Decl   : Declarations := No_Declarations;
 294       Parent : Package_Id   := No_Package;
 295       Next   : Package_Id   := No_Package;
 296    end record;
 297    --  A package (includes declarations that may include other packages)
 298
 299    package Package_Table is new GNAT.Dynamic_Tables
 300      (Table_Component_Type => Package_Element,
 301       Table_Index_Type     => Package_Id,
 302       Table_Low_Bound      => 1,
 303       Table_Initial        => 100,
 304       Table_Increment      => 100);
 305    --  The table that contains all packages
 306
 307    type Language_Index is new Nat;
 308    --  Index of language data
 309
 310    No_Language_Index : constant Language_Index := 0;
 311    --  Constant indicating that there is no language data
 312
 313    procedure Display_Language_Name
 314      (In_Tree  : Project_Tree_Ref;
 315       Language : Language_Index);
 316    --  Output the name of a language
 317
 318    Max_Header_Num : constant := 6150;
 319    type Header_Num is range 0 .. Max_Header_Num;
 320    --  Size for hash table below. The upper bound is an arbitrary value, the
 321    --  value here was chosen after testing to determine a good compromise
 322    --  between speed of access and memory usage.
 323
 324    function Hash (Name : Name_Id)        return Header_Num;
 325    function Hash (Name : File_Name_Type) return Header_Num;
 326    function Hash (Name : Path_Name_Type) return Header_Num;
 327    --  Used for computing hash values for names put into above hash table
 328
 329    function Hash (Project : Project_Id) return Header_Num;
 330    --  Used for hash tables where Project_Id is the Key
 331
 332    type Language_Kind is (File_Based, Unit_Based);
 333    --  Type for the kind of language. All languages are file based, except Ada
 334    --  which is unit based.
 335
 336    type Dependency_File_Kind is (None, Makefile, ALI_File);
 337    --  Type of dependency to be checked: no dependency file, Makefile fragment
 338    --  or ALI file (for Ada).
 339
 340    Makefile_Dependency_Suffix : constant String := ".d";
 341    ALI_Dependency_Suffix      : constant String := ".ali";
 342
 343    Switches_Dependency_Suffix : constant String := ".cswi";
 344
 345    Binder_Exchange_Suffix     : constant String := ".bexch";
 346    --  Suffix for binder exchange files
 347
 348    Library_Exchange_Suffix     : constant String := ".lexch";
 349    --  Suffix for library exchange files
 350
 351    type Name_List_Index is new Nat;
 352    No_Name_List            : constant Name_List_Index := 0;
 353
 354    type Name_Node is record
 355       Name : Name_Id         := No_Name;
 356       Next : Name_List_Index := No_Name_List;
 357    end record;
 358
 359    package Name_List_Table is new GNAT.Dynamic_Tables
 360      (Table_Component_Type => Name_Node,
 361       Table_Index_Type     => Name_List_Index,
 362       Table_Low_Bound      => 1,
 363       Table_Initial        => 10,
 364       Table_Increment      => 100);
 365    --  The table for lists of names used in package Language_Processing
 366
 367    package Mapping_Files_Htable is new Simple_HTable
 368      (Header_Num => Header_Num,
 369       Element    => Path_Name_Type,
 370       No_Element => No_Path,
 371       Key        => Path_Name_Type,
 372       Hash       => Hash,
 373       Equal      => "=");
 374    --  A hash table to store the mapping files that are not used
 375
 376    type Lang_Naming_Data is record
 377       Dot_Replacement : File_Name_Type := No_File;
 378       --  The string to replace '.' in the source file name (for Ada)
 379
 380       Casing : Casing_Type := All_Lower_Case;
 381       --  The casing of the source file name (for Ada)
 382
 383       Separate_Suffix : File_Name_Type := No_File;
 384       --  String to append to unit name for source file name of an Ada subunit
 385
 386       Spec_Suffix : File_Name_Type := No_File;
 387       --  The string to append to the unit name for the
 388       --  source file name of a spec.
 389
 390       Body_Suffix : File_Name_Type := No_File;
 391       --  The string to append to the unit name for the
 392       --  source file name of a body.
 393    end record;
 394
 395    No_Lang_Naming_Data : constant Lang_Naming_Data :=
 396                            (Dot_Replacement => No_File,
 397                             Casing          => All_Lower_Case,
 398                             Separate_Suffix => No_File,
 399                             Spec_Suffix     => No_File,
 400                             Body_Suffix     => No_File);
 401
 402    type Source_Id is new Nat;
 403
 404    No_Source : constant Source_Id := 0;
 405
 406    type Path_Syntax_Kind is
 407      (Canonical,
 408       --  Unix style
 409
 410       Host);
 411       --  Host specific syntax, for example on VMS (the default)
 412
 413    type Language_Config is record
 414       Kind : Language_Kind := File_Based;
 415       --  Kind of language. All languages are file based, except Ada which is
 416       --  unit based.
 417
 418       Naming_Data : Lang_Naming_Data;
 419       --  The naming data for the languages (prefixes, etc.)
 420
 421       Include_Compatible_Languages : Name_List_Index := No_Name_List;
 422       --  The list of languages that are "include compatible" with this
 423       --  language. A language B (for example "C") is "include compatible" with
 424       --  a language A (for example "C++") if it is expected that sources of
 425       --  language A may "include" header files from language B.
 426
 427       Compiler_Driver : File_Name_Type := No_File;
 428       --  The name of the executable for the compiler of the language
 429
 430       Compiler_Driver_Path : String_Access := null;
 431       --  The path name of the executable for the compiler of the language
 432
 433       Compiler_Required_Switches : Name_List_Index := No_Name_List;
 434       --  The list of switches that are required as a minimum to invoke the
 435       --  compiler driver.
 436
 437       Path_Syntax                  : Path_Syntax_Kind := Host;
 438       --  Value may be Canonical (Unix style) or Host (host syntax, for example
 439       --  on VMS for DEC C).
 440
 441       Compilation_PIC_Option : Name_List_Index := No_Name_List;
 442       --  The option(s) to compile a source in Position Independent Code for
 443       --  shared libraries. Specified in the configuration. When not specified,
 444       --  there is no need for such switch.
 445
 446       Object_Generated             : Boolean := True;
 447       --  False in no object file is generated
 448
 449       Objects_Linked               : Boolean := True;
 450       --  False if object files are not use to link executables and build
 451       --  libraries.
 452
 453       Runtime_Library_Dir        : Name_Id := No_Name;
 454       --  Path name of the runtime library directory, if any
 455
 456       Mapping_File_Switches  : Name_List_Index := No_Name_List;
 457       --  The option(s) to provide a mapping file to the compiler. Specified in
 458       --  the configuration. When value is No_Name_List, there is no mapping
 459       --  file.
 460
 461       Mapping_Spec_Suffix        : File_Name_Type       := No_File;
 462       --  Placeholder representing the spec suffix in a mapping file
 463
 464       Mapping_Body_Suffix        : File_Name_Type       := No_File;
 465       --  Placeholder representing the body suffix in a mapping file
 466
 467       Config_File_Switches       : Name_List_Index      := No_Name_List;
 468       --  The option(s) to provide a config file to the compiler. Specified in
 469       --  the configuration. When value is No_Name_List, there is no config
 470       --  file.
 471
 472       Dependency_Kind            : Dependency_File_Kind := None;
 473       --  The kind of dependency to be checked: none, Makefile fragment or
 474       --  ALI file (for Ada).
 475
 476       Dependency_Option          : Name_List_Index      := No_Name_List;
 477       --  The option(s) to be used to create the dependency file. When value is
 478       --  No_Name_List, there is not such option(s).
 479
 480       Compute_Dependency         : Name_List_Index      := No_Name_List;
 481       --  Hold the value of attribute Dependency_Driver, if declared for the
 482       --  language.
 483
 484       Include_Option             : Name_List_Index      := No_Name_List;
 485       --  Hold the value of attribute Include_Switches, if declared for the
 486       --  language.
 487
 488       Include_Path : Name_Id := No_Name;
 489       --  Name of environment variable declared by attribute Include_Path for
 490       --  the language.
 491
 492       Include_Path_File : Name_Id := No_Name;
 493       --  Name of environment variable declared by attribute Include_Path_File
 494       --  for the language.
 495
 496       Objects_Path : Name_Id := No_Name;
 497       --  Name of environment variable declared by attribute Objects_Path for
 498       --  the language.
 499
 500       Objects_Path_File : Name_Id := No_Name;
 501       --  Name of environment variable declared by attribute Objects_Path_File
 502       --  for the language.
 503
 504       Config_Body                : Name_Id         := No_Name;
 505       --  The template for a pragma Source_File_Name(_Project) for a specific
 506       --  file name of a body.
 507
 508       Config_Spec           : Name_Id         := No_Name;
 509       --  The template for a pragma Source_File_Name(_Project) for a specific
 510       --  file name of a spec.
 511
 512       Config_Body_Pattern   : Name_Id         := No_Name;
 513       --  The template for a pragma Source_File_Name(_Project) for a naming
 514       --  body pattern.
 515
 516       Config_Spec_Pattern   : Name_Id         := No_Name;
 517       --  The template for a pragma Source_File_Name(_Project) for a naming
 518       --  spec pattern.
 519
 520       Config_File_Unique         : Boolean         := False;
 521       --  Indicate if the config file specified to the compiler needs to be
 522       --  unique. If it is unique, then all config files are concatenated into
 523       --  a temp config file.
 524
 525       Binder_Driver              : File_Name_Type  := No_File;
 526       --  The name of the binder driver for the language, if any
 527
 528       Binder_Driver_Path         : Path_Name_Type  := No_Path;
 529       --  The path name of the binder driver
 530
 531       Binder_Required_Switches   : Name_List_Index      := No_Name_List;
 532       --  Hold the value of attribute Binder'Required_Switches for the language
 533
 534       Binder_Prefix              : Name_Id         := No_Name;
 535       --  Hold the value of attribute Binder'Prefix for the language
 536
 537       Toolchain_Version          : Name_Id         := No_Name;
 538       --  Hold the value of attribute Toolchain_Version for the language
 539
 540       Toolchain_Description      : Name_Id         := No_Name;
 541       --  Hold the value of attribute Toolchain_Description for the language
 542
 543    end record;
 544    --  Record describing the configuration of a language
 545
 546    No_Language_Config : constant Language_Config :=
 547                           (Kind                         => File_Based,
 548                            Naming_Data                  => No_Lang_Naming_Data,
 549                            Include_Compatible_Languages => No_Name_List,
 550                            Compiler_Driver              => No_File,
 551                            Compiler_Driver_Path         => null,
 552                            Compiler_Required_Switches   => No_Name_List,
 553                            Path_Syntax                  => Canonical,
 554                            Compilation_PIC_Option       => No_Name_List,
 555                            Object_Generated             => True,
 556                            Objects_Linked               => True,
 557                            Runtime_Library_Dir          => No_Name,
 558                            Mapping_File_Switches        => No_Name_List,
 559                            Mapping_Spec_Suffix          => No_File,
 560                            Mapping_Body_Suffix          => No_File,
 561                            Config_File_Switches         => No_Name_List,
 562                            Dependency_Kind              => Makefile,
 563                            Dependency_Option            => No_Name_List,
 564                            Compute_Dependency           => No_Name_List,
 565                            Include_Option               => No_Name_List,
 566                            Include_Path                 => No_Name,
 567                            Include_Path_File            => No_Name,
 568                            Objects_Path                 => No_Name,
 569                            Objects_Path_File            => No_Name,
 570                            Config_Body                  => No_Name,
 571                            Config_Spec                  => No_Name,
 572                            Config_Body_Pattern          => No_Name,
 573                            Config_Spec_Pattern          => No_Name,
 574                            Config_File_Unique           => False,
 575                            Binder_Driver                => No_File,
 576                            Binder_Driver_Path           => No_Path,
 577                            Binder_Required_Switches     => No_Name_List,
 578                            Binder_Prefix                => No_Name,
 579                            Toolchain_Version            => No_Name,
 580                            Toolchain_Description        => No_Name);
 581
 582    type Language_Data is record
 583       Name          : Name_Id         := No_Name;
 584       Display_Name  : Name_Id         := No_Name;
 585       Config        : Language_Config := No_Language_Config;
 586       First_Source  : Source_Id       := No_Source;
 587       Mapping_Files : Mapping_Files_Htable.Instance :=
 588                         Mapping_Files_Htable.Nil;
 589       Next          : Language_Index  := No_Language_Index;
 590    end record;
 591
 592    No_Language_Data : constant Language_Data :=
 593                         (Name          => No_Name,
 594                          Display_Name  => No_Name,
 595                          Config        => No_Language_Config,
 596                          First_Source  => No_Source,
 597                          Mapping_Files => Mapping_Files_Htable.Nil,
 598                          Next          => No_Language_Index);
 599
 600    package Language_Data_Table is new GNAT.Dynamic_Tables
 601      (Table_Component_Type => Language_Data,
 602       Table_Index_Type     => Language_Index,
 603       Table_Low_Bound      => 1,
 604       Table_Initial        => 10,
 605       Table_Increment      => 100);
 606    --  The table for lists of names used in package Language_Processing
 607
 608    type Alternate_Language_Id is new Nat;
 609
 610    No_Alternate_Language : constant Alternate_Language_Id := 0;
 611
 612    type Alternate_Language_Data is record
 613       Language : Language_Index := No_Language_Index;
 614       Next     : Alternate_Language_Id := No_Alternate_Language;
 615    end record;
 616
 617    package Alternate_Language_Table is new GNAT.Dynamic_Tables
 618      (Table_Component_Type => Alternate_Language_Data,
 619       Table_Index_Type     => Alternate_Language_Id,
 620       Table_Low_Bound      => 1,
 621       Table_Initial        => 10,
 622       Table_Increment      => 100);
 623    --  The table for storing the alternate languages of a header file that
 624    --  is used for several languages.
 625
 626    type Source_Kind is (Spec, Impl, Sep);
 627
 628    type Source_Data is record
 629       Project             : Project_Id            := No_Project;
 630       --  Project of the source
 631
 632       Language_Name       : Name_Id               := No_Name;
 633       --  Name of the language of the source
 634
 635       Language            : Language_Index        := No_Language_Index;
 636       --  Index of the language
 637
 638       Lang_Kind           : Language_Kind         := File_Based;
 639       --  Kind of the language
 640
 641       Compiled            : Boolean               := True;
 642       --  False when there is no compiler for the language
 643
 644       In_Interfaces       : Boolean               := True;
 645       --  False when the source is not included in interfaces, when attribute
 646       --  Interfaces is declared.
 647
 648       Declared_In_Interfaces : Boolean            := False;
 649       --  True when source is declared in attribute Interfaces
 650
 651       Alternate_Languages : Alternate_Language_Id := No_Alternate_Language;
 652       --  List of languages a header file may also be, in addition of
 653       --  language Language_Name.
 654
 655       Kind                : Source_Kind           := Spec;
 656       --  Kind of the source: spec, body or subunit
 657
 658       Dependency          : Dependency_File_Kind  := None;
 659       --  Kind of dependency: none, Makefile fragment or ALI file
 660
 661       Other_Part          : Source_Id             := No_Source;
 662       --  Source ID for the other part, if any: for a spec, indicates its body;
 663       --  for a body, indicates its spec.
 664
 665       Unit                : Name_Id               := No_Name;
 666       --  Name of the unit, if language is unit based
 667
 668       Index               : Int                   := 0;
 669       --  Index of the source in a multi unit source file
 670
 671       Locally_Removed     : Boolean               := False;
 672       --  True if the source has been "excluded"
 673
 674       Get_Object          : Boolean               := False;
 675       --  Indicates that the object of the source should be put in the global
 676       --  archive. This is for Ada, when only the closure of a main needs to
 677       --  be compiled/recompiled.
 678
 679       Replaced_By         : Source_Id             := No_Source;
 680
 681       File                : File_Name_Type        := No_File;
 682       --  Canonical file name of the source
 683
 684       Display_File        : File_Name_Type        := No_File;
 685       --  File name of the source, for display purposes
 686
 687       Path                : Path_Information      := No_Path_Information;
 688       --  Path name of the source
 689
 690       Source_TS           : Time_Stamp_Type       := Empty_Time_Stamp;
 691       --  Time stamp of the source file
 692
 693       Object_Project      : Project_Id            := No_Project;
 694       --  Project where the object file is
 695
 696       Object_Exists       : Boolean               := True;
 697       --  True if an object file exists
 698
 699       Object_Linked          : Boolean               := True;
 700       --  False if the object file is not use to link executables or included
 701       --  in libraries.
 702
 703       Object              : File_Name_Type        := No_File;
 704       --  File name of the object file
 705
 706       Current_Object_Path : Path_Name_Type        := No_Path;
 707       --  Object path of an existing object file
 708
 709       Object_Path         : Path_Name_Type        := No_Path;
 710       --  Object path of the real object file
 711
 712       Object_TS           : Time_Stamp_Type       := Empty_Time_Stamp;
 713       --  Object file time stamp
 714
 715       Dep_Name            : File_Name_Type        := No_File;
 716       --  Dependency file simple name
 717
 718       Current_Dep_Path    : Path_Name_Type        := No_Path;
 719       --  Path name of an existing dependency file
 720
 721       Dep_Path            : Path_Name_Type        := No_Path;
 722       --  Path name of the real dependency file
 723
 724       Dep_TS              : Time_Stamp_Type       := Empty_Time_Stamp;
 725       --  Dependency file time stamp
 726
 727       Switches            : File_Name_Type        := No_File;
 728       --  File name of the switches file
 729
 730       Switches_Path       : Path_Name_Type        := No_Path;
 731       --  Path name of the switches file
 732
 733       Switches_TS         : Time_Stamp_Type       := Empty_Time_Stamp;
 734       --  Switches file time stamp
 735
 736       Naming_Exception    : Boolean               := False;
 737       --  True if the source has an exceptional name
 738
 739       Next_In_Sources     : Source_Id             := No_Source;
 740       --  Link to another source in the project tree
 741
 742       Next_In_Project     : Source_Id             := No_Source;
 743       --  Link to another source in the project
 744
 745       Next_In_Lang        : Source_Id             := No_Source;
 746       --  Link to another source of the same language
 747    end record;
 748
 749    No_Source_Data : constant Source_Data :=
 750                       (Project                => No_Project,
 751                        Language_Name          => No_Name,
 752                        Language               => No_Language_Index,
 753                        Lang_Kind              => File_Based,
 754                        Compiled               => True,
 755                        In_Interfaces          => True,
 756                        Declared_In_Interfaces => False,
 757                        Alternate_Languages    => No_Alternate_Language,
 758                        Kind                   => Spec,
 759                        Dependency             => None,
 760                        Other_Part             => No_Source,
 761                        Unit                   => No_Name,
 762                        Index                  => 0,
 763                        Locally_Removed        => False,
 764                        Get_Object             => False,
 765                        Replaced_By            => No_Source,
 766                        File                   => No_File,
 767                        Display_File           => No_File,
 768                        Path                   => No_Path_Information,
 769                        Source_TS              => Empty_Time_Stamp,
 770                        Object_Project         => No_Project,
 771                        Object_Exists          => True,
 772                        Object_Linked          => True,
 773                        Object                 => No_File,
 774                        Current_Object_Path    => No_Path,
 775                        Object_Path            => No_Path,
 776                        Object_TS              => Empty_Time_Stamp,
 777                        Dep_Name               => No_File,
 778                        Current_Dep_Path       => No_Path,
 779                        Dep_Path               => No_Path,
 780                        Dep_TS                 => Empty_Time_Stamp,
 781                        Switches               => No_File,
 782                        Switches_Path          => No_Path,
 783                        Switches_TS            => Empty_Time_Stamp,
 784                        Naming_Exception       => False,
 785                        Next_In_Sources        => No_Source,
 786                        Next_In_Project        => No_Source,
 787                        Next_In_Lang           => No_Source);
 788
 789    package Source_Data_Table is new GNAT.Dynamic_Tables
 790      (Table_Component_Type => Source_Data,
 791       Table_Index_Type     => Source_Id,
 792       Table_Low_Bound      => 1,
 793       Table_Initial        => 1000,
 794       Table_Increment      => 100);
 795    --  The table for the sources
 796
 797    package Source_Paths_Htable is new Simple_HTable
 798      (Header_Num => Header_Num,
 799       Element    => Source_Id,
 800       No_Element => No_Source,
 801       Key        => Path_Name_Type,
 802       Hash       => Hash,
 803       Equal      => "=");
 804    --  Mapping of source paths to source ids
 805
 806    type Verbosity is (Default, Medium, High);
 807    --  Verbosity when parsing GNAT Project Files
 808    --    Default is default (very quiet, if no errors).
 809    --    Medium is more verbose.
 810    --    High is extremely verbose.
 811
 812    Current_Verbosity : Verbosity := Default;
 813    --  The current value of the verbosity the project files are parsed with
 814
 815    type Lib_Kind is (Static, Dynamic, Relocatable);
 816
 817    type Policy is (Autonomous, Compliant, Controlled, Restricted, Direct);
 818    --  Type to specify the symbol policy, when symbol control is supported.
 819    --  See full explanation about this type in package Symbols.
 820    --    Autonomous: Create a symbol file without considering any reference
 821    --    Compliant:  Try to be as compatible as possible with an existing ref
 822    --    Controlled: Fail if symbols are not the same as those in the reference
 823    --    Restricted: Restrict the symbols to those in the symbol file
 824    --    Direct:     The symbol file is used as is
 825
 826    type Symbol_Record is record
 827       Symbol_File   : Path_Name_Type := No_Path;
 828       Reference     : Path_Name_Type := No_Path;
 829       Symbol_Policy : Policy  := Autonomous;
 830    end record;
 831    --  Type to keep the symbol data to be used when building a shared library
 832
 833    No_Symbols : constant Symbol_Record :=
 834      (Symbol_File   => No_Path,
 835       Reference     => No_Path,
 836       Symbol_Policy => Autonomous);
 837    --  The default value of the symbol data
 838
 839    function Image (Casing : Casing_Type) return String;
 840    --  Similar to 'Image (but avoid use of this attribute in compiler)
 841
 842    function Value (Image : String) return Casing_Type;
 843    --  Similar to 'Value (but avoid use of this attribute in compiler)
 844    --  Raises Constraint_Error if not a Casing_Type image.
 845
 846    --  The following record contains data for a naming scheme
 847
 848    type Naming_Data is record
 849
 850       Dot_Replacement : File_Name_Type := No_File;
 851       --  The string to replace '.' in the source file name (for Ada)
 852
 853       Dot_Repl_Loc : Source_Ptr := No_Location;
 854
 855       Casing : Casing_Type := All_Lower_Case;
 856       --  The casing of the source file name (for Ada)
 857
 858       Spec_Suffix : Array_Element_Id := No_Array_Element;
 859       --  The string to append to the unit name for the
 860       --  source file name of a spec.
 861       --  Indexed by the programming language.
 862
 863       Ada_Spec_Suffix_Loc : Source_Ptr := No_Location;
 864
 865       Body_Suffix : Array_Element_Id := No_Array_Element;
 866       --  The string to append to the unit name for the
 867       --  source file name of a body.
 868       --  Indexed by the programming language.
 869
 870       Ada_Body_Suffix_Loc : Source_Ptr := No_Location;
 871
 872       Separate_Suffix : File_Name_Type := No_File;
 873       --  String to append to unit name for source file name of an Ada subunit
 874
 875       Sep_Suffix_Loc : Source_Ptr := No_Location;
 876       --  Position in the project file source where Separate_Suffix is defined
 877
 878       Specs : Array_Element_Id := No_Array_Element;
 879       --  An associative array mapping individual specs to source file names
 880       --  This is specific to Ada.
 881
 882       Bodies : Array_Element_Id := No_Array_Element;
 883       --  An associative array mapping individual bodies to source file names
 884       --  This is specific to Ada.
 885
 886       Specification_Exceptions : Array_Element_Id := No_Array_Element;
 887       --  An associative array listing spec file names that do not have the
 888       --  spec suffix. Not used by Ada. Indexed by programming language name.
 889
 890       Implementation_Exceptions : Array_Element_Id := No_Array_Element;
 891       --  An associative array listing body file names that do not have the
 892       --  body suffix. Not used by Ada. Indexed by programming language name.
 893
 894    end record;
 895
 896    function Spec_Suffix_Of
 897      (In_Tree  : Project_Tree_Ref;
 898       Language : String;
 899       Naming   : Naming_Data) return String;
 900
 901    function Spec_Suffix_Id_Of
 902      (In_Tree  : Project_Tree_Ref;
 903       Language : String;
 904       Naming   : Naming_Data) return File_Name_Type;
 905
 906    function Spec_Suffix_Id_Of
 907      (In_Tree     : Project_Tree_Ref;
 908       Language_Id : Name_Id;
 909       Naming      : Naming_Data) return File_Name_Type;
 910
 911    procedure Set_Spec_Suffix
 912      (In_Tree  : Project_Tree_Ref;
 913       Language : String;
 914       Naming   : in out Naming_Data;
 915       Suffix   : File_Name_Type);
 916
 917    function Body_Suffix_Id_Of
 918      (In_Tree  : Project_Tree_Ref;
 919       Language : String;
 920       Naming   : Naming_Data) return File_Name_Type;
 921
 922    function Body_Suffix_Id_Of
 923      (In_Tree     : Project_Tree_Ref;
 924       Language_Id : Name_Id;
 925       Naming      : Naming_Data) return File_Name_Type;
 926
 927    function Body_Suffix_Of
 928      (In_Tree  : Project_Tree_Ref;
 929       Language : String;
 930       Naming   : Naming_Data) return String;
 931
 932    procedure Set_Body_Suffix
 933      (In_Tree  : Project_Tree_Ref;
 934       Language : String;
 935       Naming   : in out Naming_Data;
 936       Suffix   : File_Name_Type);
 937
 938    function Objects_Exist_For
 939      (Language : String;
 940       In_Tree  : Project_Tree_Ref) return Boolean;
 941
 942    function Standard_Naming_Data
 943      (Tree : Project_Tree_Ref := No_Project_Tree) return Naming_Data;
 944    pragma Inline (Standard_Naming_Data);
 945    --  The standard GNAT naming scheme when Tree is No_Project_Tree.
 946    --  Otherwise, return the default naming scheme for the project tree Tree,
 947    --  which must have been Initialized.
 948
 949    function Same_Naming_Scheme
 950      (Left, Right : Naming_Data) return Boolean;
 951    --  Returns True if Left and Right are the same naming scheme
 952    --  not considering Specs and Bodies.
 953
 954    type Project_List is new Nat;
 955    Empty_Project_List : constant Project_List := 0;
 956    --  A list of project files
 957
 958    type Project_Element is record
 959       Project : Project_Id   := No_Project;
 960       Next    : Project_List := Empty_Project_List;
 961    end record;
 962    --  Element in a list of project files. Next is the id of the next
 963    --  project file in the list.
 964
 965    package Project_List_Table is new GNAT.Dynamic_Tables
 966      (Table_Component_Type => Project_Element,
 967       Table_Index_Type     => Project_List,
 968       Table_Low_Bound      => 1,
 969       Table_Initial        => 100,
 970       Table_Increment      => 100);
 971    --  The table that contains the lists of project files
 972
 973    type Project_Configuration is record
 974       Run_Path_Option               : Name_List_Index := No_Name_List;
 975       --  The option to use when linking to specify the path where to look for
 976       --  libraries.
 977
 978       Executable_Suffix             : Name_Id         := No_Name;
 979       --  The suffix of executables, when specified in the configuration or in
 980       --  package Builder of the main project. When this is not specified, the
 981       --  executable suffix is the default for the platform.
 982
 983       --  Linking
 984
 985       Linker                        : Path_Name_Type  := No_Path;
 986       --  Path name of the linker driver. Specified in the configuration or in
 987       --  the package Builder of the main project.
 988
 989       Map_File_Option               : Name_Id := No_Name;
 990       --  Option to use when invoking the linker to build a map file
 991
 992       Minimum_Linker_Options        : Name_List_Index := No_Name_List;
 993       --  The minimum options for the linker driver. Specified in the
 994       --  configuration.
 995
 996       Linker_Executable_Option      : Name_List_Index := No_Name_List;
 997       --  The option(s) to indicate the name of the executable in the linker
 998       --  command. Specified in the configuration. When not specified, default
 999       --  to -o <executable name>.
1000
1001       Linker_Lib_Dir_Option         : Name_Id         := No_Name;
1002       --  The option to specify where to find a library for linking. Specified
1003       --  in the configuration. When not specified, defaults to "-L".
1004
1005       Linker_Lib_Name_Option        : Name_Id         := No_Name;
1006       --  The option to specify the name of a library for linking. Specified in
1007       --  the configuration. When not specified, defaults to "-l".
1008
1009       --  Libraries
1010
1011       Library_Builder               : Path_Name_Type  := No_Path;
1012       --  The executable to build library (specified in the configuration)
1013
1014       Lib_Support                   : Library_Support := None;
1015       --  The level of library support. Specified in the configuration. Support
1016       --  is none, static libraries only or both static and shared libraries.
1017
1018       Archive_Builder               : Name_List_Index := No_Name_List;
1019       --  The name of the executable to build archives, with the minimum
1020       --  switches. Specified in the configuration.
1021
1022       Archive_Builder_Append_Option : Name_List_Index := No_Name_List;
1023       --  The options to append object files to an archive
1024
1025       Archive_Indexer               : Name_List_Index := No_Name_List;
1026       --  The name of the executable to index archives, with the minimum
1027       --  switches. Specified in the configuration.
1028
1029       Archive_Suffix                : File_Name_Type  := No_File;
1030       --  The suffix of archives. Specified in the configuration. When not
1031       --  specified, defaults to ".a".
1032
1033       Lib_Partial_Linker            : Name_List_Index := No_Name_List;
1034
1035       --  Shared libraries
1036
1037       Shared_Lib_Driver             : File_Name_Type  := No_File;
1038       --  The driver to link shared libraries. Set with attribute Library_GCC.
1039       --  Default to gcc.
1040
1041       Shared_Lib_Prefix             : File_Name_Type  := No_File;
1042       --  Part of a shared library file name that precedes the name of the
1043       --  library. Specified in the configuration. When not specified, defaults
1044       --  to "lib".
1045
1046       Shared_Lib_Suffix             : File_Name_Type  := No_File;
1047       --  Suffix of shared libraries, after the library name in the shared
1048       --  library name. Specified in the configuration. When not specified,
1049       --  default to ".so".
1050
1051       Shared_Lib_Min_Options        : Name_List_Index := No_Name_List;
1052       --  The minimum options to use when building a shared library
1053
1054       Lib_Version_Options           : Name_List_Index := No_Name_List;
1055       --  The options to use to specify a library version
1056
1057       Symbolic_Link_Supported       : Boolean         := False;
1058       --  True if the platform supports symbolic link files
1059
1060       Lib_Maj_Min_Id_Supported      : Boolean         := False;
1061       --  True if platform supports library major and minor options, such as
1062       --  libname.so -> libname.so.2 -> libname.so.2.4
1063
1064       Auto_Init_Supported           : Boolean         := False;
1065       --  True if automatic initialisation is supported for shared stand-alone
1066       --  libraries.
1067    end record;
1068
1069    Default_Project_Config : constant Project_Configuration :=
1070                               (Run_Path_Option               => No_Name_List,
1071                                Executable_Suffix             => No_Name,
1072                                Linker                        => No_Path,
1073                                Map_File_Option               => No_Name,
1074                                Minimum_Linker_Options        => No_Name_List,
1075                                Linker_Executable_Option      => No_Name_List,
1076                                Linker_Lib_Dir_Option         => No_Name,
1077                                Linker_Lib_Name_Option        => No_Name,
1078                                Library_Builder               => No_Path,
1079                                Lib_Support                   => None,
1080                                Archive_Builder               => No_Name_List,
1081                                Archive_Builder_Append_Option => No_Name_List,
1082                                Archive_Indexer               => No_Name_List,
1083                                Archive_Suffix                => No_File,
1084                                Lib_Partial_Linker            => No_Name_List,
1085                                Shared_Lib_Driver             => No_File,
1086                                Shared_Lib_Prefix             => No_File,
1087                                Shared_Lib_Suffix             => No_File,
1088                                Shared_Lib_Min_Options        => No_Name_List,
1089                                Lib_Version_Options           => No_Name_List,
1090                                Symbolic_Link_Supported       => False,
1091                                Lib_Maj_Min_Id_Supported      => False,
1092                                Auto_Init_Supported           => False);
1093
1094    --  The following record describes a project file representation
1095
1096    --  Note that it is not specified if the path names of directories (source,
1097    --  object, library or exec directories) end with or without a directory
1098    --  separator.
1099
1100    type Project_Data is record
1101
1102       -------------
1103       -- General --
1104       -------------
1105
1106       Name : Name_Id := No_Name;
1107       --  The name of the project
1108
1109       Display_Name : Name_Id := No_Name;
1110       --  The name of the project with the spelling of its declaration
1111
1112       Qualifier : Project_Qualifier := Unspecified;
1113       --  The eventual qualifier for this project
1114
1115       Externally_Built : Boolean := False;
1116       --  True if the project is externally built. In such case, the Project
1117       --  Manager will not modify anything in this project.
1118
1119       Config : Project_Configuration;
1120
1121       Path : Path_Information := No_Path_Information;
1122       --  The path name of the project file
1123
1124       Virtual : Boolean := False;
1125       --  True for virtual extending projects
1126
1127       Location : Source_Ptr := No_Location;
1128       --  The location in the project file source of the reserved word project
1129
1130       Naming : Naming_Data := Standard_Naming_Data;
1131       --  The naming scheme of this project file
1132
1133       ---------------
1134       -- Languages --
1135       ---------------
1136
1137       Languages : Name_List_Index := No_Name_List;
1138       --  The list of languages of the sources of this project
1139
1140       Include_Language : Language_Index := No_Language_Index;
1141
1142       First_Language_Processing : Language_Index := No_Language_Index;
1143       --  First index of the language data in the project
1144
1145       Unit_Based_Language_Name  : Name_Id := No_Name;
1146       Unit_Based_Language_Index : Language_Index := No_Language_Index;
1147       --  The name and index, if any, of the unit-based language of some
1148       --  sources of the project. There may be only one unit-based language
1149       --  in one project.
1150
1151       --------------
1152       -- Projects --
1153       --------------
1154
1155       First_Referred_By : Project_Id := No_Project;
1156       --  The project, if any, that was the first to be known as importing or
1157       --  extending this project
1158
1159       Mains : String_List_Id := Nil_String;
1160       --  List of mains specified by attribute Main
1161
1162       Extends : Project_Id := No_Project;
1163       --  The reference of the project file, if any, that this project file
1164       --  extends.
1165
1166       Extended_By : Project_Id := No_Project;
1167       --  The reference of the project file, if any, that extends this project
1168       --  file.
1169
1170       Decl : Declarations := No_Declarations;
1171       --  The declarations (variables, attributes and packages) of this project
1172       --  file.
1173
1174       Imported_Projects : Project_List := Empty_Project_List;
1175       --  The list of all directly imported projects, if any
1176
1177       All_Imported_Projects : Project_List := Empty_Project_List;
1178       --  The list of all projects imported directly or indirectly, if any
1179
1180       -----------------
1181       -- Directories --
1182       -----------------
1183
1184       Directory : Path_Information := No_Path_Information;
1185       --  Path name of the directory where the project file resides
1186
1187       Dir_Path : String_Access;
1188       --  Same as Directory.Name, but as an access to String
1189
1190       Object_Directory : Path_Information := No_Path_Information;
1191       --  The path name of the object directory of this project file
1192
1193       Exec_Directory : Path_Information := No_Path_Information;
1194       --  The path name of the exec directory of this project file. Default is
1195       --  equal to Object_Directory.
1196
1197       -------------
1198       -- Library --
1199       -------------
1200
1201       Library : Boolean := False;
1202       --  True if this is a library project
1203
1204       Library_Name : Name_Id := No_Name;
1205       --  If a library project, name of the library
1206
1207       Library_Kind : Lib_Kind := Static;
1208       --  If a library project, kind of library
1209
1210       Library_Dir : Path_Information := No_Path_Information;
1211       --  If a library project, path name of the directory where the library
1212       --  resides.
1213
1214       Library_TS : Time_Stamp_Type := Empty_Time_Stamp;
1215       --  The timestamp of a library file in a library project
1216
1217       Library_Src_Dir : Path_Information := No_Path_Information;
1218       --  If a Stand-Alone Library project, path name of the directory where
1219       --  the sources of the interfaces of the library are copied. By default,
1220       --  if attribute Library_Src_Dir is not specified, sources of the
1221       --  interfaces are not copied anywhere.
1222
1223       Library_ALI_Dir : Path_Information := No_Path_Information;
1224       --  In a library project, path name of the directory where the ALI files
1225       --  are copied. If attribute Library_ALI_Dir is not specified, ALI files
1226       --  are copied in the Library_Dir.
1227
1228       Lib_Internal_Name : Name_Id := No_Name;
1229       --  If a library project, internal name store inside the library
1230
1231       Standalone_Library : Boolean := False;
1232       --  Indicate that this is a Standalone Library Project File
1233
1234       Lib_Interface_ALIs : String_List_Id := Nil_String;
1235       --  For Standalone Library Project Files, indicate the list of Interface
1236       --  ALI files.
1237
1238       Lib_Auto_Init : Boolean := False;
1239       --  For non static Stand-Alone Library Project Files, indicate if
1240       --  the library initialisation should be automatic.
1241
1242       Symbol_Data : Symbol_Record := No_Symbols;
1243       --  Symbol file name, reference symbol file name, symbol policy
1244
1245       Need_To_Build_Lib : Boolean := False;
1246       --  Indicates that the library of a Library Project needs to be built or
1247       --  rebuilt.
1248
1249       -------------
1250       -- Sources --
1251       -------------
1252
1253       Ada_Sources_Present : Boolean := True;
1254       --  True if there are Ada sources in the project
1255
1256       Other_Sources_Present : Boolean := True;
1257       --  True if there are non-Ada sources in the project
1258
1259       Ada_Sources : String_List_Id := Nil_String;
1260       --  The list of all the Ada source file names (gnatmake only)
1261
1262       First_Source : Source_Id := No_Source;
1263       Last_Source  : Source_Id := No_Source;
1264       --  Head and tail of the list of sources
1265
1266       Interfaces_Defined      : Boolean := False;
1267       --  True if attribute Interfaces is declared for the project or any
1268       --  project it extends.
1269
1270       Imported_Directories_Switches : Argument_List_Access := null;
1271       --  List of the source search switches (-I<source dir>) to be used when
1272       --  compiling.
1273
1274       Include_Path : String_Access := null;
1275       --  The search source path for the project. Used as the value for an
1276       --  environment variable, specified by attribute Include_Path
1277       --  (<language>). The names of the environment variables are in component
1278       --  Include_Path of the records Language_Config.
1279
1280       Include_Path_File : Path_Name_Type := No_Path;
1281       --  The path name of the of the source search directory file
1282
1283       Include_Data_Set : Boolean := False;
1284       --  Set True when Imported_Directories_Switches or Include_Path are set
1285
1286       Source_Dirs : String_List_Id := Nil_String;
1287       --  The list of all the source directories
1288
1289       Known_Order_Of_Source_Dirs : Boolean := True;
1290       --  False, if there is any /** in the Source_Dirs, because in this case
1291       --  the ordering of the source subdirs depend on the OS. If True,
1292       --  duplicate file names in the same project file are allowed.
1293
1294       Ada_Include_Path : String_Access := null;
1295       --  The cached value of source search path for this project file. Set by
1296       --  the first call to Prj.Env.Ada_Include_Path for the project. Do not
1297       --  use this field directly outside of the project manager, use
1298       --  Prj.Env.Ada_Include_Path instead.
1299
1300       -------------------
1301       -- Miscellaneous --
1302       -------------------
1303
1304       Ada_Objects_Path : String_Access := null;
1305       --  The cached value of ADA_OBJECTS_PATH for this project file. Do not
1306       --  use this field directly outside of the compiler, use
1307       --  Prj.Env.Ada_Objects_Path instead.
1308
1309       Libgnarl_Needed : Yes_No_Unknown := Unknown;
1310       --  Set to True when libgnarl is needed to link
1311
1312       Objects_Path : String_Access := null;
1313       --  The cached value of the object dir path, used during the binding
1314       --  phase of gprbuild.
1315
1316       Objects_Path_File_With_Libs : Path_Name_Type := No_Path;
1317       --  The cached value of the object path temp file (including library
1318       --  dirs) for this project file.
1319
1320       Objects_Path_File_Without_Libs : Path_Name_Type := No_Path;
1321       --  The cached value of the object path temp file (excluding library
1322       --  dirs) for this project file.
1323
1324       Config_File_Name : Path_Name_Type := No_Path;
1325       --  The path name of the configuration pragmas file, if any
1326
1327       Config_File_Temp : Boolean := False;
1328       --  An indication that the configuration pragmas file is a temporary file
1329       --  that must be deleted at the end.
1330
1331       Config_Checked : Boolean := False;
1332       --  A flag to avoid checking repetitively the configuration pragmas file
1333
1334       Checked : Boolean := False;
1335       --  A flag to avoid checking repetitively the naming scheme of this
1336       --  project file.
1337
1338       Seen : Boolean := False;
1339       --  A flag to mark a project as "visited" to avoid processing the same
1340       --  project several time.
1341
1342       Depth : Natural := 0;
1343       --  The maximum depth of a project in the project graph. Depth of main
1344       --  project is 0.
1345
1346       Unkept_Comments : Boolean := False;
1347       --  True if there are comments in the project sources that cannot be kept
1348       --  in the project tree.
1349
1350    end record;
1351
1352    function Empty_Project (Tree : Project_Tree_Ref) return Project_Data;
1353    --  Return the representation of an empty project in project Tree tree.
1354    --  The project tree Tree must have been Initialized and/or Reset.
1355
1356    function Is_Extending
1357      (Extending : Project_Id;
1358       Extended  : Project_Id;
1359       In_Tree   : Project_Tree_Ref) return Boolean;
1360    --  ??? needs comment
1361
1362    function Is_A_Language
1363      (Tree          : Project_Tree_Ref;
1364       Data          : Project_Data;
1365       Language_Name : Name_Id) return Boolean;
1366    --  Return True when Language_Name (which must be lower case) is one of the
1367    --  languages used for the project.
1368
1369    Project_Error : exception;
1370    --  Raised by some subprograms in Prj.Attr
1371
1372    package Project_Table is new GNAT.Dynamic_Tables (
1373      Table_Component_Type => Project_Data,
1374      Table_Index_Type     => Project_Id,
1375      Table_Low_Bound      => 1,
1376      Table_Initial        => 100,
1377      Table_Increment      => 100);
1378    --  The set of all project files
1379
1380    type Spec_Or_Body is (Specification, Body_Part);
1381
1382    type File_Name_Data is record
1383       Name         : File_Name_Type   := No_File;
1384       Index        : Int              := 0;
1385       Display_Name : File_Name_Type   := No_File;
1386       Path         : Path_Information := No_Path_Information;
1387       Project      : Project_Id       := No_Project;
1388       Needs_Pragma : Boolean          := False;
1389    end record;
1390    --  File and Path name of a spec or body
1391
1392    type File_Names_Data is array (Spec_Or_Body) of File_Name_Data;
1393
1394    type Unit_Index is new Nat;
1395    No_Unit_Index : constant Unit_Index := 0;
1396    type Unit_Data is record
1397       Name       : Name_Id    := No_Name;
1398       File_Names : File_Names_Data;
1399    end record;
1400    --  Name and File and Path names of a unit, with a reference to its
1401    --  GNAT Project File(s).
1402
1403    package Unit_Table is new GNAT.Dynamic_Tables
1404      (Table_Component_Type => Unit_Data,
1405       Table_Index_Type     => Unit_Index,
1406       Table_Low_Bound      => 1,
1407       Table_Initial        => 100,
1408       Table_Increment      => 100);
1409    --  Table of all units in a project tree
1410
1411    package Units_Htable is new Simple_HTable
1412      (Header_Num => Header_Num,
1413       Element    => Unit_Index,
1414       No_Element => No_Unit_Index,
1415       Key        => Name_Id,
1416       Hash       => Hash,
1417       Equal      => "=");
1418    --  Mapping of unit names to indexes in the Units table
1419
1420    type Unit_Project is record
1421       Unit    : Unit_Index := No_Unit_Index;
1422       Project : Project_Id := No_Project;
1423    end record;
1424
1425    No_Unit_Project : constant Unit_Project := (No_Unit_Index, No_Project);
1426
1427    package Files_Htable is new Simple_HTable
1428      (Header_Num => Header_Num,
1429       Element    => Unit_Project,
1430       No_Element => No_Unit_Project,
1431       Key        => File_Name_Type,
1432       Hash       => Hash,
1433       Equal      => "=");
1434    --  Mapping of file names to indexes in the Units table
1435
1436    type Private_Project_Tree_Data is private;
1437    --  Data for a project tree that is used only by the Project Manager
1438
1439    type Project_Tree_Data is
1440       record
1441          --  Languages and sources of the project
1442
1443          First_Language : Language_Index  := No_Language_Index;
1444          --
1445
1446          First_Source : Source_Id := No_Source;
1447          --
1448
1449          --  Tables
1450
1451          Languages_Data    : Language_Data_Table.Instance;
1452          Name_Lists        : Name_List_Table.Instance;
1453          String_Elements   : String_Element_Table.Instance;
1454          Variable_Elements : Variable_Element_Table.Instance;
1455          Array_Elements    : Array_Element_Table.Instance;
1456          Arrays            : Array_Table.Instance;
1457          Packages          : Package_Table.Instance;
1458          Project_Lists     : Project_List_Table.Instance;
1459          Projects          : Project_Table.Instance;
1460          Sources           : Source_Data_Table.Instance;
1461          Alt_Langs         : Alternate_Language_Table.Instance;
1462          Units             : Unit_Table.Instance;
1463          Units_HT          : Units_Htable.Instance;
1464          Files_HT          : Files_Htable.Instance;
1465          Source_Paths_HT   : Source_Paths_Htable.Instance;
1466
1467          --  Private part
1468
1469          Private_Part : Private_Project_Tree_Data;
1470       end record;
1471    --  Data for a project tree
1472
1473    type Put_Line_Access is access procedure
1474      (Line    : String;
1475       Project : Project_Id;
1476       In_Tree : Project_Tree_Ref);
1477    --  Use to customize error reporting in Prj.Proc and Prj.Nmsc
1478
1479    procedure Expect (The_Token : Token_Type; Token_Image : String);
1480    --  Check that the current token is The_Token. If it is not, then output
1481    --  an error message.
1482
1483    procedure Initialize (Tree : Project_Tree_Ref);
1484    --  This procedure must be called before using any services from the Prj
1485    --  hierarchy. Namet.Initialize must be called before Prj.Initialize.
1486
1487    procedure Reset (Tree : Project_Tree_Ref);
1488    --  This procedure resets all the tables that are used when processing a
1489    --  project file tree. Initialize must be called before the call to Reset.
1490
1491    procedure Register_Default_Naming_Scheme
1492      (Language            : Name_Id;
1493       Default_Spec_Suffix : File_Name_Type;
1494       Default_Body_Suffix : File_Name_Type;
1495       In_Tree             : Project_Tree_Ref);
1496    --  Register the default suffixes for a given language. These extensions
1497    --  will be ignored if the user has specified a new naming scheme in a
1498    --  project file.
1499    --
1500    --  Otherwise, this information will be automatically added to Naming_Data
1501    --  when a project is processed, in the lists Spec_Suffix and Body_Suffix.
1502
1503    generic
1504       type State is limited private;
1505       with procedure Action
1506         (Project    : Project_Id;
1507          With_State : in out State);
1508    procedure For_Every_Project_Imported
1509      (By         : Project_Id;
1510       In_Tree    : Project_Tree_Ref;
1511       With_State : in out State);
1512    --  Call Action for each project imported directly or indirectly by project
1513    --  By. Action is called according to the order of importation: if A
1514    --  imports B, directly or indirectly, Action will be called for A before
1515    --  it is called for B. If two projects import each other directly or
1516    --  indirectly (using at least one "limited with"), it is not specified
1517    --  for which of these two projects Action will be called first. Projects
1518    --  that are extended by other projects are not considered. With_State may
1519    --  be used by Action to choose a behavior or to report some global result.
1520
1521    function Extend_Name
1522      (File        : File_Name_Type;
1523       With_Suffix : String) return File_Name_Type;
1524    --  Replace the extension of File with With_Suffix
1525
1526    function Object_Name
1527      (Source_File_Name : File_Name_Type) return File_Name_Type;
1528    --  Returns the object file name corresponding to a source file name
1529
1530    function Dependency_Name
1531      (Source_File_Name : File_Name_Type;
1532       Dependency       : Dependency_File_Kind) return File_Name_Type;
1533    --  Returns the dependency file name corresponding to a source file name
1534
1535    function Switches_Name
1536      (Source_File_Name : File_Name_Type) return File_Name_Type;
1537    --  Returns the switches file name corresponding to a source file name
1538
1539    ----------------
1540    -- Temp Files --
1541    ----------------
1542
1543    procedure Record_Temp_File (Path : Path_Name_Type);
1544    --  Record the path of a newly created temporary file, so that it can be
1545    --  deleted later.
1546
1547    procedure Delete_All_Temp_Files;
1548    --  Delete all recorded temporary files
1549
1550 private
1551
1552    All_Packages : constant String_List_Access := null;
1553
1554    No_Project_Tree : constant Project_Tree_Ref := null;
1555
1556    Ignored : constant Variable_Kind := Single;
1557
1558    Nil_Variable_Value : constant Variable_Value :=
1559                           (Project  => No_Project,
1560                            Kind     => Undefined,
1561                            Location => No_Location,
1562                            Default  => False);
1563
1564    Virtual_Prefix : constant String := "v$";
1565    --  The prefix for virtual extending projects. Because of the '$', which is
1566    --  normally forbidden for project names, there cannot be any name clash.
1567
1568    Empty_Name : Name_Id;
1569    --  Name_Id for an empty name (no characters). Initialized in procedure
1570    --  Initialize.
1571
1572    Empty_File_Name : File_Name_Type;
1573    --  Empty File_Name_Type (no characters). Initialized in procedure
1574    --  Initialize.
1575
1576    procedure Add_To_Buffer
1577      (S    : String;
1578       To   : in out String_Access;
1579       Last : in out Natural);
1580    --  Append a String to the Buffer
1581
1582    type Naming_Id is new Nat;
1583
1584    package Naming_Table is new GNAT.Dynamic_Tables
1585      (Table_Component_Type => Naming_Data,
1586       Table_Index_Type     => Naming_Id,
1587       Table_Low_Bound      => 1,
1588       Table_Initial        => 5,
1589       Table_Increment      => 100);
1590    --  Table storing the naming data for gnatmake/gprmake
1591
1592    package Path_File_Table is new GNAT.Dynamic_Tables
1593      (Table_Component_Type => Path_Name_Type,
1594       Table_Index_Type     => Natural,
1595       Table_Low_Bound      => 1,
1596       Table_Initial        => 50,
1597       Table_Increment      => 100);
1598    --  Table storing all the temp path file names.
1599    --  Used by Delete_All_Path_Files.
1600
1601    package Source_Path_Table is new GNAT.Dynamic_Tables
1602      (Table_Component_Type => Name_Id,
1603       Table_Index_Type     => Natural,
1604       Table_Low_Bound      => 1,
1605       Table_Initial        => 50,
1606       Table_Increment      => 100);
1607    --  A table to store the source dirs before creating the source path file
1608
1609    package Object_Path_Table is new GNAT.Dynamic_Tables
1610      (Table_Component_Type => Path_Name_Type,
1611       Table_Index_Type     => Natural,
1612       Table_Low_Bound      => 1,
1613       Table_Initial        => 50,
1614       Table_Increment      => 100);
1615    --  A table to store the object dirs, before creating the object path file
1616
1617    type Private_Project_Tree_Data is record
1618       Namings        : Naming_Table.Instance;
1619       Path_Files     : Path_File_Table.Instance;
1620       Source_Paths   : Source_Path_Table.Instance;
1621       Object_Paths   : Object_Path_Table.Instance;
1622       Default_Naming : Naming_Data;
1623    end record;
1624    --  Type to represent the part of a project tree which is private to the
1625    --  Project Manager.
1626
1627 end Prj;