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) 2001-2010, 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 Osint;
  35 with Scans;  use Scans;
  36 with Types;  use Types;
  37
  38 with GNAT.Dynamic_HTables; use GNAT.Dynamic_HTables;
  39 with GNAT.Dynamic_Tables;
  40 with GNAT.OS_Lib;          use GNAT.OS_Lib;
  41
  42 package Prj is
  43
  44    All_Other_Names : constant Name_Id := Names_High_Bound;
  45    --  Name used to replace others as an index of an associative array
  46    --  attribute in situations where this is allowed.
  47
  48    Subdirs : String_Ptr := null;
  49    --  The value after the equal sign in switch --subdirs=...
  50    --  Contains the relative subdirectory.
  51
  52    type Library_Support is (None, Static_Only, Full);
  53    --  Support for Library Project File.
  54    --  - None: Library Project Files are not supported at all
  55    --  - Static_Only: Library Project Files are only supported for static
  56    --    libraries.
  57    --  - Full: Library Project Files are supported for static and dynamic
  58    --    (shared) libraries.
  59
  60    type Yes_No_Unknown is (Yes, No, Unknown);
  61    --  Tri-state to decide if -lgnarl is needed when linking
  62
  63    type Project_Qualifier is
  64      (Unspecified,
  65       Standard,
  66       Library,
  67       Configuration,
  68       Dry,
  69       Aggregate,
  70       Aggregate_Library);
  71    --  Qualifiers that can prefix the reserved word "project" in a project
  72    --  file:
  73    --    Standard:             standard project ...
  74    --    Library:              library project is ...
  75    --    Dry:                  abstract project is
  76    --    Aggregate:            aggregate project is
  77    --    Aggregate_Library:    aggregate library project is ...
  78    --    Configuration:        configuration project is ...
  79
  80    All_Packages : constant String_List_Access;
  81    --  Default value of parameter Packages of procedures Parse, in Prj.Pars and
  82    --  Prj.Part, indicating that all packages should be checked.
  83
  84    type Project_Tree_Data;
  85    type Project_Tree_Ref is access all Project_Tree_Data;
  86    --  Reference to a project tree. Several project trees may exist in memory
  87    --  at the same time.
  88
  89    No_Project_Tree : constant Project_Tree_Ref;
  90
  91    procedure Free (Tree : in out Project_Tree_Ref);
  92    --  Free memory associated with the tree
  93
  94    Config_Project_File_Extension : String := ".cgpr";
  95    Project_File_Extension : String := ".gpr";
  96    --  The standard config and user project file name extensions. They are not
  97    --  constants, because Canonical_Case_File_Name is called on these variables
  98    --  in the body of Prj.
  99
 100    function Empty_File   return File_Name_Type;
 101    function Empty_String return Name_Id;
 102    --  Return the id for an empty string ""
 103
 104    type Path_Information is record
 105       Name         : Path_Name_Type := No_Path;
 106       Display_Name : Path_Name_Type := No_Path;
 107    end record;
 108    --  Directory names always end with a directory separator
 109
 110    No_Path_Information : constant Path_Information := (No_Path, No_Path);
 111
 112    type Project_Data;
 113    type Project_Id is access all Project_Data;
 114    No_Project : constant Project_Id := null;
 115    --  Id of a Project File
 116
 117    type String_List_Id is new Nat;
 118    Nil_String : constant String_List_Id := 0;
 119    type String_Element is record
 120       Value         : Name_Id        := No_Name;
 121       Index         : Int            := 0;
 122       Display_Value : Name_Id        := No_Name;
 123       Location      : Source_Ptr     := No_Location;
 124       Flag          : Boolean        := False;
 125       Next          : String_List_Id := Nil_String;
 126    end record;
 127    --  To hold values for string list variables and array elements.
 128    --  Component Flag may be used for various purposes. For source
 129    --  directories, it indicates if the directory contains Ada source(s).
 130
 131    package String_Element_Table is new GNAT.Dynamic_Tables
 132      (Table_Component_Type => String_Element,
 133       Table_Index_Type     => String_List_Id,
 134       Table_Low_Bound      => 1,
 135       Table_Initial        => 200,
 136       Table_Increment      => 100);
 137    --  The table for string elements in string lists
 138
 139    type Variable_Kind is (Undefined, List, Single);
 140    --  Different kinds of variables
 141
 142    subtype Defined_Variable_Kind is Variable_Kind range List .. Single;
 143    --  The defined kinds of variables
 144
 145    Ignored : constant Variable_Kind;
 146    --  Used to indicate that a package declaration must be ignored
 147    --  while processing the project tree (unknown package name).
 148
 149    type Variable_Value (Kind : Variable_Kind := Undefined) is record
 150       Project  : Project_Id := No_Project;
 151       Location : Source_Ptr := No_Location;
 152       Default  : Boolean    := False;
 153       case Kind is
 154          when Undefined =>
 155             null;
 156          when List =>
 157             Values : String_List_Id := Nil_String;
 158          when Single =>
 159             Value : Name_Id := No_Name;
 160             Index : Int     := 0;
 161       end case;
 162    end record;
 163    --  Values for variables and array elements. Default is True if the
 164    --  current value is the default one for the variable.
 165
 166    Nil_Variable_Value : constant Variable_Value;
 167    --  Value of a non existing variable or array element
 168
 169    type Variable_Id is new Nat;
 170    No_Variable : constant Variable_Id := 0;
 171    type Variable is record
 172       Next  : Variable_Id := No_Variable;
 173       Name  : Name_Id;
 174       Value : Variable_Value;
 175    end record;
 176    --  To hold the list of variables in a project file and in packages
 177
 178    package Variable_Element_Table is new GNAT.Dynamic_Tables
 179      (Table_Component_Type => Variable,
 180       Table_Index_Type     => Variable_Id,
 181       Table_Low_Bound      => 1,
 182       Table_Initial        => 200,
 183       Table_Increment      => 100);
 184    --  The table of variable in list of variables
 185
 186    type Array_Element_Id is new Nat;
 187    No_Array_Element : constant Array_Element_Id := 0;
 188    type Array_Element is record
 189       Index                : Name_Id;
 190       Src_Index            : Int := 0;
 191       Index_Case_Sensitive : Boolean := True;
 192       Value                : Variable_Value;
 193       Next                 : Array_Element_Id := No_Array_Element;
 194    end record;
 195    --  Each Array_Element represents an array element and is linked (Next)
 196    --  to the next array element, if any, in the array.
 197
 198    package Array_Element_Table is new GNAT.Dynamic_Tables
 199      (Table_Component_Type => Array_Element,
 200       Table_Index_Type     => Array_Element_Id,
 201       Table_Low_Bound      => 1,
 202       Table_Initial        => 200,
 203       Table_Increment      => 100);
 204    --  The table that contains all array elements
 205
 206    type Array_Id is new Nat;
 207    No_Array : constant Array_Id := 0;
 208    type Array_Data is record
 209       Name     : Name_Id          := No_Name;
 210       Location : Source_Ptr       := No_Location;
 211       Value    : Array_Element_Id := No_Array_Element;
 212       Next     : Array_Id         := No_Array;
 213    end record;
 214    --  Each Array_Data value represents an array.
 215    --  Value is the id of the first element.
 216    --  Next is the id of the next array in the project file or package.
 217
 218    package Array_Table is new GNAT.Dynamic_Tables
 219      (Table_Component_Type => Array_Data,
 220       Table_Index_Type     => Array_Id,
 221       Table_Low_Bound      => 1,
 222       Table_Initial        => 200,
 223       Table_Increment      => 100);
 224    --  The table that contains all arrays
 225
 226    type Package_Id is new Nat;
 227    No_Package : constant Package_Id := 0;
 228    type Declarations is record
 229       Variables  : Variable_Id := No_Variable;
 230       Attributes : Variable_Id := No_Variable;
 231       Arrays     : Array_Id    := No_Array;
 232       Packages   : Package_Id  := No_Package;
 233    end record;
 234    --  Contains the declarations (variables, single and array attributes,
 235    --  packages) for a project or a package in a project.
 236
 237    No_Declarations : constant Declarations :=
 238      (Variables  => No_Variable,
 239       Attributes => No_Variable,
 240       Arrays     => No_Array,
 241       Packages   => No_Package);
 242    --  Default value of Declarations: indicates that there is no declarations
 243
 244    type Package_Element is record
 245       Name   : Name_Id      := No_Name;
 246       Decl   : Declarations := No_Declarations;
 247       Parent : Package_Id   := No_Package;
 248       Next   : Package_Id   := No_Package;
 249    end record;
 250    --  A package (includes declarations that may include other packages)
 251
 252    package Package_Table is new GNAT.Dynamic_Tables
 253      (Table_Component_Type => Package_Element,
 254       Table_Index_Type     => Package_Id,
 255       Table_Low_Bound      => 1,
 256       Table_Initial        => 100,
 257       Table_Increment      => 100);
 258    --  The table that contains all packages
 259
 260    type Language_Data;
 261    type Language_Ptr is access all Language_Data;
 262    --  Index of language data
 263
 264    No_Language_Index : constant Language_Ptr := null;
 265    --  Constant indicating that there is no language data
 266
 267    function Get_Language_From_Name
 268      (Project : Project_Id;
 269       Name    : String) return Language_Ptr;
 270    --  Get a language from a project. This might return null if no such
 271    --  language exists in the project
 272
 273    Max_Header_Num : constant := 6150;
 274    type Header_Num is range 0 .. Max_Header_Num;
 275    --  Size for hash table below. The upper bound is an arbitrary value, the
 276    --  value here was chosen after testing to determine a good compromise
 277    --  between speed of access and memory usage.
 278
 279    function Hash (Name : Name_Id)        return Header_Num;
 280    function Hash (Name : File_Name_Type) return Header_Num;
 281    function Hash (Name : Path_Name_Type) return Header_Num;
 282    function Hash (Project : Project_Id)  return Header_Num;
 283    --  Used for computing hash values for names put into hash tables
 284
 285    type Language_Kind is (File_Based, Unit_Based);
 286    --  Type for the kind of language. All languages are file based, except Ada
 287    --  which is unit based.
 288
 289    type Dependency_File_Kind is (None, Makefile, ALI_File);
 290    --  Type of dependency to be checked: no dependency file, Makefile fragment
 291    --  or ALI file (for Ada).
 292
 293    Makefile_Dependency_Suffix : constant String := ".d";
 294    ALI_Dependency_Suffix      : constant String := ".ali";
 295
 296    Switches_Dependency_Suffix : constant String := ".cswi";
 297
 298    Binder_Exchange_Suffix     : constant String := ".bexch";
 299    --  Suffix for binder exchange files
 300
 301    Library_Exchange_Suffix     : constant String := ".lexch";
 302    --  Suffix for library exchange files
 303
 304    type Name_List_Index is new Nat;
 305    No_Name_List            : constant Name_List_Index := 0;
 306
 307    type Name_Node is record
 308       Name : Name_Id         := No_Name;
 309       Next : Name_List_Index := No_Name_List;
 310    end record;
 311
 312    package Name_List_Table is new GNAT.Dynamic_Tables
 313      (Table_Component_Type => Name_Node,
 314       Table_Index_Type     => Name_List_Index,
 315       Table_Low_Bound      => 1,
 316       Table_Initial        => 10,
 317       Table_Increment      => 100);
 318    --  The table for lists of names
 319
 320    function Length
 321      (Table : Name_List_Table.Instance;
 322       List  : Name_List_Index) return Natural;
 323    --  Return the number of elements in specified list
 324
 325    type Number_List_Index is new Nat;
 326    No_Number_List : constant Number_List_Index := 0;
 327
 328    type Number_Node is record
 329       Number : Natural           := 0;
 330       Next   : Number_List_Index := No_Number_List;
 331    end record;
 332
 333    package Number_List_Table is new GNAT.Dynamic_Tables
 334      (Table_Component_Type => Number_Node,
 335       Table_Index_Type     => Number_List_Index,
 336       Table_Low_Bound      => 1,
 337       Table_Initial        => 10,
 338       Table_Increment      => 100);
 339    --  The table for lists of numbers
 340
 341    package Mapping_Files_Htable is new Simple_HTable
 342      (Header_Num => Header_Num,
 343       Element    => Path_Name_Type,
 344       No_Element => No_Path,
 345       Key        => Path_Name_Type,
 346       Hash       => Hash,
 347       Equal      => "=");
 348    --  A hash table to store the mapping files that are not used
 349
 350    --  The following record ???
 351
 352    type Lang_Naming_Data is record
 353       Dot_Replacement : File_Name_Type := No_File;
 354       --  The string to replace '.' in the source file name (for Ada)
 355
 356       Casing : Casing_Type := All_Lower_Case;
 357       --  The casing of the source file name (for Ada)
 358
 359       Separate_Suffix : File_Name_Type := No_File;
 360       --  String to append to unit name for source file name of an Ada subunit
 361
 362       Spec_Suffix : File_Name_Type := No_File;
 363       --  The string to append to the unit name for the
 364       --  source file name of a spec.
 365
 366       Body_Suffix : File_Name_Type := No_File;
 367       --  The string to append to the unit name for the
 368       --  source file name of a body.
 369    end record;
 370
 371    No_Lang_Naming_Data : constant Lang_Naming_Data :=
 372                            (Dot_Replacement => No_File,
 373                             Casing          => All_Lower_Case,
 374                             Separate_Suffix => No_File,
 375                             Spec_Suffix     => No_File,
 376                             Body_Suffix     => No_File);
 377
 378    function Is_Standard_GNAT_Naming (Naming : Lang_Naming_Data) return Boolean;
 379    --  True if the naming scheme is GNAT's default naming scheme. This
 380    --  is to take into account shortened names like "Ada." (a-), "System." (s-)
 381    --  and so on.
 382
 383    type Source_Data;
 384    type Source_Id is access all Source_Data;
 385
 386    function Is_Compilable (Source : Source_Id) return Boolean;
 387    pragma Inline (Is_Compilable);
 388    --  Return True if we know how to compile Source (i.e. if a compiler is
 389    --  defined). This doesn't indicate whether the source should be compiled.
 390
 391    function Object_To_Global_Archive (Source : Source_Id) return Boolean;
 392    pragma Inline (Object_To_Global_Archive);
 393    --  Return True if the object file should be put in the global archive.
 394    --  This is for Ada, when only the closure of a main needs to be
 395    --  (re)compiled.
 396
 397    function Other_Part (Source : Source_Id) return Source_Id;
 398    pragma Inline (Other_Part);
 399    --  Source ID for the other part, if any: for a spec, indicates its body;
 400    --  for a body, indicates its spec.
 401
 402    No_Source : constant Source_Id := null;
 403
 404    type Path_Syntax_Kind is
 405      (Canonical,
 406       --  Unix style
 407       Host);
 408       --  Host specific syntax, for example on VMS (the default)
 409
 410    --  The following record describes the configuration of a language
 411
 412    type Language_Config is record
 413       Kind : Language_Kind := File_Based;
 414       --  Kind of language. All languages are file based, except Ada which is
 415       --  unit based.
 416
 417       Naming_Data : Lang_Naming_Data;
 418       --  The naming data for the languages (prefixes, etc.)
 419
 420       Include_Compatible_Languages : Name_List_Index := No_Name_List;
 421       --  List of languages that are "include compatible" with this language. A
 422       --  language B (for example "C") is "include compatible" with a language
 423       --  A (for example "C++") if it is expected that sources of language A
 424       --  may "include" header files from language B.
 425
 426       Compiler_Driver : File_Name_Type := No_File;
 427       --  The name of the executable for the compiler of the language
 428
 429       Compiler_Driver_Path : String_Access := null;
 430       --  The path name of the executable for the compiler of the language
 431
 432       Compiler_Leading_Required_Switches : Name_List_Index := No_Name_List;
 433       --  The list of initial switches that are required as a minimum to invoke
 434       --  the compiler driver.
 435
 436       Compiler_Trailing_Required_Switches : Name_List_Index := No_Name_List;
 437       --  The list of final switches that are required as a minimum to invoke
 438       --  the compiler driver.
 439
 440       Multi_Unit_Switches : Name_List_Index := No_Name_List;
 441       --  The switch(es) to indicate the index of a unit in a multi-source file
 442
 443       Multi_Unit_Object_Separator : Character := ' ';
 444       --  The string separating the base name of a source from the index of the
 445       --  unit in a multi-source file, in the object file name.
 446
 447       Path_Syntax : Path_Syntax_Kind := Host;
 448       --  Value may be Canonical (Unix style) or Host (host syntax, for example
 449       --  on VMS for DEC C).
 450
 451       Object_File_Suffix : Name_Id := No_Name;
 452       --  Optional alternate object file suffix
 453
 454       Object_File_Switches : Name_List_Index := No_Name_List;
 455       --  Optional object file switches. When this is defined, the switches
 456       --  are used to specify the object file. The object file name is appended
 457       --  to the last switch in the list. Example: ("-o", "").
 458
 459       Compilation_PIC_Option : Name_List_Index := No_Name_List;
 460       --  The option(s) to compile a source in Position Independent Code for
 461       --  shared libraries. Specified in the configuration. When not specified,
 462       --  there is no need for such switch.
 463
 464       Object_Generated : Boolean := True;
 465       --  False in no object file is generated
 466
 467       Objects_Linked : Boolean := True;
 468       --  False if object files are not use to link executables and build
 469       --  libraries.
 470
 471       Runtime_Library_Dir : Name_Id := No_Name;
 472       --  Path name of the runtime library directory, if any
 473
 474       Runtime_Source_Dir : Name_Id := No_Name;
 475       --  Path name of the runtime source directory, if any
 476
 477       Mapping_File_Switches : Name_List_Index := No_Name_List;
 478       --  The option(s) to provide a mapping file to the compiler. Specified in
 479       --  the configuration. When value is No_Name_List, there is no mapping
 480       --  file.
 481
 482       Mapping_Spec_Suffix : File_Name_Type := No_File;
 483       --  Placeholder representing the spec suffix in a mapping file
 484
 485       Mapping_Body_Suffix : File_Name_Type := No_File;
 486       --  Placeholder representing the body suffix in a mapping file
 487
 488       Config_File_Switches : Name_List_Index := No_Name_List;
 489       --  The option(s) to provide a config file to the compiler. Specified in
 490       --  the configuration. If value is No_Name_List there is no config file.
 491
 492       Dependency_Kind : Dependency_File_Kind := None;
 493       --  The kind of dependency to be checked: none, Makefile fragment or
 494       --  ALI file (for Ada).
 495
 496       Dependency_Option : Name_List_Index := No_Name_List;
 497       --  The option(s) to be used to create the dependency file. When value is
 498       --  No_Name_List, there is not such option(s).
 499
 500       Compute_Dependency : Name_List_Index := No_Name_List;
 501       --  Hold the value of attribute Dependency_Driver, if declared for the
 502       --  language.
 503
 504       Include_Option : Name_List_Index := No_Name_List;
 505       --  Hold the value of attribute Include_Switches, if declared for the
 506       --  language.
 507
 508       Include_Path : Name_Id := No_Name;
 509       --  Name of environment variable declared by attribute Include_Path for
 510       --  the language.
 511
 512       Include_Path_File : Name_Id := No_Name;
 513       --  Name of environment variable declared by attribute Include_Path_File
 514       --  for the language.
 515
 516       Objects_Path : Name_Id := No_Name;
 517       --  Name of environment variable declared by attribute Objects_Path for
 518       --  the language.
 519
 520       Objects_Path_File : Name_Id := No_Name;
 521       --  Name of environment variable declared by attribute Objects_Path_File
 522       --  for the language.
 523
 524       Config_Body : Name_Id := No_Name;
 525       --  The template for a pragma Source_File_Name(_Project) for a specific
 526       --  file name of a body.
 527
 528       Config_Body_Index : Name_Id := No_Name;
 529       --  The template for a pragma Source_File_Name(_Project) for a specific
 530       --  file name of a body in a multi-source file.
 531
 532       Config_Body_Pattern : Name_Id := No_Name;
 533       --  The template for a pragma Source_File_Name(_Project) for a naming
 534       --  body pattern.
 535
 536       Config_Spec : Name_Id := No_Name;
 537       --  The template for a pragma Source_File_Name(_Project) for a specific
 538       --  file name of a spec.
 539
 540       Config_Spec_Index : Name_Id := No_Name;
 541       --  The template for a pragma Source_File_Name(_Project) for a specific
 542       --  file name of a spec in a multi-source file.
 543
 544       Config_Spec_Pattern : Name_Id := No_Name;
 545       --  The template for a pragma Source_File_Name(_Project) for a naming
 546       --  spec pattern.
 547
 548       Config_File_Unique : Boolean := False;
 549       --  Indicate if the config file specified to the compiler needs to be
 550       --  unique. If it is unique, then all config files are concatenated into
 551       --  a temp config file.
 552
 553       Binder_Driver : File_Name_Type := No_File;
 554       --  The name of the binder driver for the language, if any
 555
 556       Binder_Driver_Path : Path_Name_Type := No_Path;
 557       --  The path name of the binder driver
 558
 559       Binder_Required_Switches : Name_List_Index := No_Name_List;
 560       --  Hold the value of attribute Binder'Required_Switches for the language
 561
 562       Binder_Prefix : Name_Id := No_Name;
 563       --  Hold the value of attribute Binder'Prefix for the language
 564
 565       Toolchain_Version : Name_Id := No_Name;
 566       --  Hold the value of attribute Toolchain_Version for the language
 567
 568       Toolchain_Description : Name_Id := No_Name;
 569       --  Hold the value of attribute Toolchain_Description for the language
 570
 571    end record;
 572
 573    No_Language_Config : constant Language_Config :=
 574                           (Kind                         => File_Based,
 575                            Naming_Data                  => No_Lang_Naming_Data,
 576                            Include_Compatible_Languages => No_Name_List,
 577                            Compiler_Driver              => No_File,
 578                            Compiler_Driver_Path         => null,
 579                            Compiler_Leading_Required_Switches  => No_Name_List,
 580                            Compiler_Trailing_Required_Switches => No_Name_List,
 581                            Multi_Unit_Switches          => No_Name_List,
 582                            Multi_Unit_Object_Separator  => ' ',
 583                            Path_Syntax                  => Canonical,
 584                            Object_File_Suffix           => No_Name,
 585                            Object_File_Switches         => No_Name_List,
 586                            Compilation_PIC_Option       => No_Name_List,
 587                            Object_Generated             => True,
 588                            Objects_Linked               => True,
 589                            Runtime_Library_Dir          => No_Name,
 590                            Runtime_Source_Dir           => No_Name,
 591                            Mapping_File_Switches        => No_Name_List,
 592                            Mapping_Spec_Suffix          => No_File,
 593                            Mapping_Body_Suffix          => No_File,
 594                            Config_File_Switches         => No_Name_List,
 595                            Dependency_Kind              => None,
 596                            Dependency_Option            => No_Name_List,
 597                            Compute_Dependency           => No_Name_List,
 598                            Include_Option               => No_Name_List,
 599                            Include_Path                 => No_Name,
 600                            Include_Path_File            => No_Name,
 601                            Objects_Path                 => No_Name,
 602                            Objects_Path_File            => No_Name,
 603                            Config_Body                  => No_Name,
 604                            Config_Body_Index            => No_Name,
 605                            Config_Body_Pattern          => No_Name,
 606                            Config_Spec                  => No_Name,
 607                            Config_Spec_Index            => No_Name,
 608                            Config_Spec_Pattern          => No_Name,
 609                            Config_File_Unique           => False,
 610                            Binder_Driver                => No_File,
 611                            Binder_Driver_Path           => No_Path,
 612                            Binder_Required_Switches     => No_Name_List,
 613                            Binder_Prefix                => No_Name,
 614                            Toolchain_Version            => No_Name,
 615                            Toolchain_Description        => No_Name);
 616
 617    --  The following record ???
 618
 619    type Language_Data is record
 620       Name          : Name_Id         := No_Name;
 621       Display_Name  : Name_Id         := No_Name;
 622       Config        : Language_Config := No_Language_Config;
 623       First_Source  : Source_Id       := No_Source;
 624       Mapping_Files : Mapping_Files_Htable.Instance :=
 625                         Mapping_Files_Htable.Nil;
 626       Next          : Language_Ptr  := No_Language_Index;
 627    end record;
 628
 629    No_Language_Data : constant Language_Data :=
 630                         (Name          => No_Name,
 631                          Display_Name  => No_Name,
 632                          Config        => No_Language_Config,
 633                          First_Source  => No_Source,
 634                          Mapping_Files => Mapping_Files_Htable.Nil,
 635                          Next          => No_Language_Index);
 636
 637    type Language_List_Element;
 638    type Language_List is access all Language_List_Element;
 639    type Language_List_Element is record
 640       Language : Language_Ptr := No_Language_Index;
 641       Next     : Language_List;
 642    end record;
 643
 644    type Source_Kind is (Spec, Impl, Sep);
 645    subtype Spec_Or_Body is Source_Kind range Spec .. Impl;
 646
 647    --  The following declarations declare a structure used to store the Name
 648    --  and File and Path names of a unit, with a reference to its GNAT Project
 649    --  File(s). Some units might have neither Spec nor Impl when they were
 650    --  created for a "separate".
 651
 652    type File_Names_Data is array (Spec_Or_Body) of Source_Id;
 653
 654    type Unit_Data is record
 655       Name       : Name_Id := No_Name;
 656       File_Names : File_Names_Data;
 657    end record;
 658
 659    type Unit_Index is access all Unit_Data;
 660
 661    No_Unit_Index : constant Unit_Index := null;
 662    --  Used to indicate a null entry for no unit
 663
 664    --  Structure to define source data
 665
 666    type Source_Data is record
 667       Project : Project_Id := No_Project;
 668       --  Project of the source
 669
 670       Location : Source_Ptr := No_Location;
 671       --  Location in the project file of the declaration of the source in
 672       --  package Naming.
 673
 674       Source_Dir_Rank : Natural := 0;
 675       --  The rank of the source directory in list declared with attribute
 676       --  Source_Dirs. Two source files with the same name cannot appears in
 677       --  different directory with the same rank. That can happen when the
 678       --  recursive notation <dir>/** is used in attribute Source_Dirs.
 679
 680       Language : Language_Ptr := No_Language_Index;
 681       --  Index of the language. This is an index into
 682       --  Project_Tree.Languages_Data.
 683
 684       In_Interfaces : Boolean := True;
 685       --  False when the source is not included in interfaces, when attribute
 686       --  Interfaces is declared.
 687
 688       Declared_In_Interfaces : Boolean := False;
 689       --  True when source is declared in attribute Interfaces
 690
 691       Alternate_Languages : Language_List := null;
 692       --  List of languages a header file may also be, in addition of language
 693       --  Language_Name.
 694
 695       Kind : Source_Kind := Spec;
 696       --  Kind of the source: spec, body or subunit
 697
 698       Unit : Unit_Index := No_Unit_Index;
 699       --  Name of the unit, if language is unit based. This is only set for
 700       --  those files that are part of the compilation set (for instance a
 701       --  file in an extended project that is overridden will not have this
 702       --  field set).
 703
 704       Index : Int := 0;
 705       --  Index of the source in a multi unit source file (the same Source_Data
 706       --  is duplicated several times when there are several units in the same
 707       --  file). Index is 0 if there is either no unit or a single one, and
 708       --  starts at 1 when there are multiple units
 709
 710       Locally_Removed : Boolean := False;
 711       --  True if the source has been "excluded"
 712
 713       Replaced_By : Source_Id := No_Source;
 714       --  Missing comment ???
 715
 716       File : File_Name_Type := No_File;
 717       --  Canonical file name of the source
 718
 719       Display_File : File_Name_Type := No_File;
 720       --  File name of the source, for display purposes
 721
 722       Path : Path_Information := No_Path_Information;
 723       --  Path name of the source
 724
 725       Source_TS : Time_Stamp_Type := Empty_Time_Stamp;
 726       --  Time stamp of the source file
 727
 728       Object_Project : Project_Id := No_Project;
 729       --  Project where the object file is. This might be different from
 730       --  Project when using extending project files.
 731
 732       Object : File_Name_Type := No_File;
 733       --  File name of the object file
 734
 735       Current_Object_Path : Path_Name_Type := No_Path;
 736       --  Object path of an existing object file
 737
 738       Object_Path : Path_Name_Type := No_Path;
 739       --  Object path of the real object file
 740
 741       Object_TS : Time_Stamp_Type := Empty_Time_Stamp;
 742       --  Object file time stamp
 743
 744       Dep_Name : File_Name_Type := No_File;
 745       --  Dependency file simple name
 746
 747       Current_Dep_Path : Path_Name_Type := No_Path;
 748       --  Path name of an existing dependency file
 749
 750       Dep_Path : Path_Name_Type := No_Path;
 751       --  Path name of the real dependency file
 752
 753       Dep_TS : aliased Osint.File_Attributes := Osint.Unknown_Attributes;
 754       --  Dependency file time stamp
 755
 756       Switches : File_Name_Type := No_File;
 757       --  File name of the switches file. For all languages, this is a file
 758       --  that ends with the .cswi extension.
 759
 760       Switches_Path : Path_Name_Type := No_Path;
 761       --  Path name of the switches file
 762
 763       Switches_TS : Time_Stamp_Type := Empty_Time_Stamp;
 764       --  Switches file time stamp
 765
 766       Naming_Exception : Boolean := False;
 767       --  True if the source has an exceptional name
 768
 769       Next_In_Lang : Source_Id := No_Source;
 770       --  Link to another source of the same language in the same project
 771    end record;
 772
 773    No_Source_Data : constant Source_Data :=
 774                       (Project                => No_Project,
 775                        Location               => No_Location,
 776                        Source_Dir_Rank        => 0,
 777                        Language               => No_Language_Index,
 778                        In_Interfaces          => True,
 779                        Declared_In_Interfaces => False,
 780                        Alternate_Languages    => null,
 781                        Kind                   => Spec,
 782                        Unit                   => No_Unit_Index,
 783                        Index                  => 0,
 784                        Locally_Removed        => False,
 785                        Replaced_By            => No_Source,
 786                        File                   => No_File,
 787                        Display_File           => No_File,
 788                        Path                   => No_Path_Information,
 789                        Source_TS              => Empty_Time_Stamp,
 790                        Object_Project         => No_Project,
 791                        Object                 => No_File,
 792                        Current_Object_Path    => No_Path,
 793                        Object_Path            => No_Path,
 794                        Object_TS              => Empty_Time_Stamp,
 795                        Dep_Name               => No_File,
 796                        Current_Dep_Path       => No_Path,
 797                        Dep_Path               => No_Path,
 798                        Dep_TS                 => Osint.Unknown_Attributes,
 799                        Switches               => No_File,
 800                        Switches_Path          => No_Path,
 801                        Switches_TS            => Empty_Time_Stamp,
 802                        Naming_Exception       => False,
 803                        Next_In_Lang           => No_Source);
 804
 805    package Source_Paths_Htable is new Simple_HTable
 806      (Header_Num => Header_Num,
 807       Element    => Source_Id,
 808       No_Element => No_Source,
 809       Key        => Path_Name_Type,
 810       Hash       => Hash,
 811       Equal      => "=");
 812    --  Mapping of source paths to source ids
 813
 814    package Unit_Sources_Htable is new Simple_HTable
 815      (Header_Num => Header_Num,
 816       Element    => Source_Id,
 817       No_Element => No_Source,
 818       Key        => Name_Id,
 819       Hash       => Hash,
 820       Equal      => "=");
 821
 822    type Verbosity is (Default, Medium, High);
 823    --  Verbosity when parsing GNAT Project Files
 824    --    Default is default (very quiet, if no errors).
 825    --    Medium is more verbose.
 826    --    High is extremely verbose.
 827
 828    Current_Verbosity : Verbosity := Default;
 829    --  The current value of the verbosity the project files are parsed with
 830
 831    type Lib_Kind is (Static, Dynamic, Relocatable);
 832
 833    type Policy is (Autonomous, Compliant, Controlled, Restricted, Direct);
 834    --  Type to specify the symbol policy, when symbol control is supported.
 835    --  See full explanation about this type in package Symbols.
 836    --    Autonomous: Create a symbol file without considering any reference
 837    --    Compliant:  Try to be as compatible as possible with an existing ref
 838    --    Controlled: Fail if symbols are not the same as those in the reference
 839    --    Restricted: Restrict the symbols to those in the symbol file
 840    --    Direct:     The symbol file is used as is
 841
 842    type Symbol_Record is record
 843       Symbol_File   : Path_Name_Type := No_Path;
 844       Reference     : Path_Name_Type := No_Path;
 845       Symbol_Policy : Policy  := Autonomous;
 846    end record;
 847    --  Type to keep the symbol data to be used when building a shared library
 848
 849    No_Symbols : constant Symbol_Record :=
 850      (Symbol_File   => No_Path,
 851       Reference     => No_Path,
 852       Symbol_Policy => Autonomous);
 853    --  The default value of the symbol data
 854
 855    function Image (The_Casing : Casing_Type) return String;
 856    --  Similar to 'Image (but avoid use of this attribute in compiler)
 857
 858    function Value (Image : String) return Casing_Type;
 859    --  Similar to 'Value (but avoid use of this attribute in compiler)
 860    --  Raises Constraint_Error if not a Casing_Type image.
 861
 862    --  The following record contains data for a naming scheme
 863
 864    function Get_Object_Directory
 865      (Project             : Project_Id;
 866       Including_Libraries : Boolean;
 867       Only_If_Ada         : Boolean := False) return Path_Name_Type;
 868    --  Return the object directory to use for the project. This depends on
 869    --  whether we have a library project or a standard project. This function
 870    --  might return No_Name when no directory applies.
 871    --  If we have a a library project file and Including_Libraries is True then
 872    --  the library dir is returned instead of the object dir.
 873    --  If Only_If_Ada is True, then No_Name will be returned when the project
 874    --  doesn't Ada sources.
 875
 876    procedure Compute_All_Imported_Projects (Tree : Project_Tree_Ref);
 877    --  For all projects in the tree, compute the list of the projects imported
 878    --  directly or indirectly by project Project. The result is stored in
 879    --  Project.All_Imported_Projects for each project
 880
 881    function Ultimate_Extending_Project_Of
 882      (Proj : Project_Id) return Project_Id;
 883    --  Returns the ultimate extending project of project Proj. If project Proj
 884    --  is not extended, returns Proj.
 885
 886    type Project_List_Element;
 887    type Project_List is access all Project_List_Element;
 888    type Project_List_Element is record
 889       Project : Project_Id   := No_Project;
 890       Next    : Project_List := null;
 891    end record;
 892    --  A list of projects
 893
 894    procedure Free_List
 895      (List         : in out Project_List;
 896       Free_Project : Boolean);
 897    --  Free the list of projects, if Free_Project, each project is also freed
 898
 899    type Response_File_Format is
 900      (None,
 901       GNU,
 902       Object_List,
 903       Option_List,
 904       GCC,
 905       GCC_GNU,
 906       GCC_Object_List,
 907       GCC_Option_List);
 908    --  The format of the different response files
 909
 910    type Project_Configuration is record
 911       Target : Name_Id := No_Name;
 912       --  The target of the configuration, when specified
 913
 914       Run_Path_Option : Name_List_Index := No_Name_List;
 915       --  The option to use when linking to specify the path where to look for
 916       --  libraries.
 917
 918       Run_Path_Origin : Name_Id := No_Name;
 919       --  Specify the string (such as "$ORIGIN") to indicate paths relative to
 920       --  the directory of the executable in the run path option.
 921
 922       Library_Install_Name_Option : Name_Id := No_Name;
 923       --  When this is not an empty list, this option, followed by the single
 924       --  name of the shared library file is used when linking a shared
 925       --  library.
 926
 927       Separate_Run_Path_Options : Boolean := False;
 928       --  True if each directory needs to be specified in a separate run path
 929       --  option.
 930
 931       Executable_Suffix : Name_Id := No_Name;
 932       --  The suffix of executables, when specified in the configuration or in
 933       --  package Builder of the main project. When this is not specified, the
 934       --  executable suffix is the default for the platform.
 935
 936       --  Linking
 937
 938       Linker : Path_Name_Type := No_Path;
 939       --  Path name of the linker driver. Specified in the configuration or in
 940       --  the package Builder of the main project.
 941
 942       Map_File_Option : Name_Id := No_Name;
 943       --  Option to use when invoking the linker to build a map file
 944
 945       Trailing_Linker_Required_Switches : Name_List_Index := No_Name_List;
 946       --  The minimum options for the linker driver. Specified in the
 947       --  configuration.
 948
 949       Linker_Executable_Option : Name_List_Index := No_Name_List;
 950       --  The option(s) to indicate the name of the executable in the linker
 951       --  command. Specified in the configuration. When not specified, default
 952       --  to -o <executable name>.
 953
 954       Linker_Lib_Dir_Option : Name_Id := No_Name;
 955       --  The option to specify where to find a library for linking. Specified
 956       --  in the configuration. When not specified, defaults to "-L".
 957
 958       Linker_Lib_Name_Option : Name_Id := No_Name;
 959       --  The option to specify the name of a library for linking. Specified in
 960       --  the configuration. When not specified, defaults to "-l".
 961
 962       Max_Command_Line_Length : Natural := 0;
 963       --  When positive and when Resp_File_Format (see below) is not None,
 964       --  if the command line for the invocation of the linker would be greater
 965       --  than this value, a response file is used to invoke the linker.
 966
 967       Resp_File_Format : Response_File_Format := None;
 968       --  The format of a response file, when linking with a response file is
 969       --  supported.
 970
 971       Resp_File_Options : Name_List_Index := No_Name_List;
 972       --  The switches, if any, that precede the path name of the response
 973       --  file in the invocation of the linker.
 974
 975       --  Libraries
 976
 977       Library_Builder : Path_Name_Type  := No_Path;
 978       --  The executable to build library (specified in the configuration)
 979
 980       Lib_Support : Library_Support := None;
 981       --  The level of library support. Specified in the configuration. Support
 982       --  is none, static libraries only or both static and shared libraries.
 983
 984       Archive_Builder : Name_List_Index := No_Name_List;
 985       --  The name of the executable to build archives, with the minimum
 986       --  switches. Specified in the configuration.
 987
 988       Archive_Builder_Append_Option : Name_List_Index := No_Name_List;
 989       --  The options to append object files to an archive
 990
 991       Archive_Indexer : Name_List_Index := No_Name_List;
 992       --  The name of the executable to index archives, with the minimum
 993       --  switches. Specified in the configuration.
 994
 995       Archive_Suffix : File_Name_Type := No_File;
 996       --  The suffix of archives. Specified in the configuration. When not
 997       --  specified, defaults to ".a".
 998
 999       Lib_Partial_Linker : Name_List_Index := No_Name_List;
1000
1001       --  Shared libraries
1002
1003       Shared_Lib_Driver : File_Name_Type := No_File;
1004       --  The driver to link shared libraries. Set with attribute Library_GCC.
1005       --  Default to gcc.
1006
1007       Shared_Lib_Prefix : File_Name_Type := No_File;
1008       --  Part of a shared library file name that precedes the name of the
1009       --  library. Specified in the configuration. When not specified, defaults
1010       --  to "lib".
1011
1012       Shared_Lib_Suffix : File_Name_Type := No_File;
1013       --  Suffix of shared libraries, after the library name in the shared
1014       --  library name. Specified in the configuration. When not specified,
1015       --  default to ".so".
1016
1017       Shared_Lib_Min_Options : Name_List_Index := No_Name_List;
1018       --  The minimum options to use when building a shared library
1019
1020       Lib_Version_Options : Name_List_Index := No_Name_List;
1021       --  The options to use to specify a library version
1022
1023       Symbolic_Link_Supported : Boolean := False;
1024       --  True if the platform supports symbolic link files
1025
1026       Lib_Maj_Min_Id_Supported : Boolean := False;
1027       --  True if platform supports library major and minor options, such as
1028       --  libname.so -> libname.so.2 -> libname.so.2.4
1029
1030       Auto_Init_Supported : Boolean := False;
1031       --  True if automatic initialisation is supported for shared stand-alone
1032       --  libraries.
1033    end record;
1034
1035    Default_Project_Config : constant Project_Configuration :=
1036                               (Target                        => No_Name,
1037                                Run_Path_Option               => No_Name_List,
1038                                Run_Path_Origin               => No_Name,
1039                                Library_Install_Name_Option   => No_Name,
1040                                Separate_Run_Path_Options     => False,
1041                                Executable_Suffix             => No_Name,
1042                                Linker                        => No_Path,
1043                                Map_File_Option               => No_Name,
1044                                Trailing_Linker_Required_Switches =>
1045                                  No_Name_List,
1046                                Linker_Executable_Option      => No_Name_List,
1047                                Linker_Lib_Dir_Option         => No_Name,
1048                                Linker_Lib_Name_Option        => No_Name,
1049                                Library_Builder               => No_Path,
1050                                Max_Command_Line_Length       => 0,
1051                                Resp_File_Format              => None,
1052                                Resp_File_Options             => No_Name_List,
1053                                Lib_Support                   => None,
1054                                Archive_Builder               => No_Name_List,
1055                                Archive_Builder_Append_Option => No_Name_List,
1056                                Archive_Indexer               => No_Name_List,
1057                                Archive_Suffix                => No_File,
1058                                Lib_Partial_Linker            => No_Name_List,
1059                                Shared_Lib_Driver             => No_File,
1060                                Shared_Lib_Prefix             => No_File,
1061                                Shared_Lib_Suffix             => No_File,
1062                                Shared_Lib_Min_Options        => No_Name_List,
1063                                Lib_Version_Options           => No_Name_List,
1064                                Symbolic_Link_Supported       => False,
1065                                Lib_Maj_Min_Id_Supported      => False,
1066                                Auto_Init_Supported           => False);
1067
1068    --  The following record describes a project file representation
1069
1070    --  Note that it is not specified if the path names of directories (source,
1071    --  object, library or exec directories) end with or without a directory
1072    --  separator.
1073
1074    type Project_Data is record
1075
1076       -------------
1077       -- General --
1078       -------------
1079
1080       Name : Name_Id := No_Name;
1081       --  The name of the project
1082
1083       Display_Name : Name_Id := No_Name;
1084       --  The name of the project with the spelling of its declaration
1085
1086       Qualifier : Project_Qualifier := Unspecified;
1087       --  The eventual qualifier for this project
1088
1089       Externally_Built : Boolean := False;
1090       --  True if the project is externally built. In such case, the Project
1091       --  Manager will not modify anything in this project.
1092
1093       Config : Project_Configuration;
1094
1095       Path : Path_Information := No_Path_Information;
1096       --  The path name of the project file. This include base name of the
1097       --  project file.
1098
1099       Virtual : Boolean := False;
1100       --  True for virtual extending projects
1101
1102       Location : Source_Ptr := No_Location;
1103       --  The location in the project file source of the reserved word project
1104
1105       ---------------
1106       -- Languages --
1107       ---------------
1108
1109       Languages : Language_Ptr := No_Language_Index;
1110       --  First index of the language data in the project.
1111       --  This is an index into the project_tree_data.languages_data.
1112       --  Traversing the list gives access to all the languages supported by
1113       --  the project.
1114
1115       --------------
1116       -- Projects --
1117       --------------
1118
1119       Mains : String_List_Id := Nil_String;
1120       --  List of mains specified by attribute Main
1121
1122       Extends : Project_Id := No_Project;
1123       --  The reference of the project file, if any, that this project file
1124       --  extends.
1125
1126       Extended_By : Project_Id := No_Project;
1127       --  The reference of the project file, if any, that extends this project
1128       --  file.
1129
1130       Decl : Declarations := No_Declarations;
1131       --  The declarations (variables, attributes and packages) of this project
1132       --  file.
1133
1134       Imported_Projects : Project_List;
1135       --  The list of all directly imported projects, if any
1136
1137       All_Imported_Projects : Project_List;
1138       --  The list of all projects imported directly or indirectly, if any.
1139       --  This does not include the project itself.
1140
1141       -----------------
1142       -- Directories --
1143       -----------------
1144
1145       Directory : Path_Information := No_Path_Information;
1146       --  Path name of the directory where the project file resides
1147
1148       Object_Directory : Path_Information := No_Path_Information;
1149       --  The path name of the object directory of this project file
1150
1151       Exec_Directory : Path_Information := No_Path_Information;
1152       --  The path name of the exec directory of this project file. Default is
1153       --  equal to Object_Directory.
1154
1155       -------------
1156       -- Library --
1157       -------------
1158
1159       Library : Boolean := False;
1160       --  True if this is a library project
1161
1162       Library_Name : Name_Id := No_Name;
1163       --  If a library project, name of the library
1164
1165       Library_Kind : Lib_Kind := Static;
1166       --  If a library project, kind of library
1167
1168       Library_Dir : Path_Information := No_Path_Information;
1169       --  If a library project, path name of the directory where the library
1170       --  resides.
1171
1172       Library_TS : Time_Stamp_Type := Empty_Time_Stamp;
1173       --  The timestamp of a library file in a library project
1174
1175       Library_Src_Dir : Path_Information := No_Path_Information;
1176       --  If a Stand-Alone Library project, path name of the directory where
1177       --  the sources of the interfaces of the library are copied. By default,
1178       --  if attribute Library_Src_Dir is not specified, sources of the
1179       --  interfaces are not copied anywhere.
1180
1181       Library_ALI_Dir : Path_Information := No_Path_Information;
1182       --  In a library project, path name of the directory where the ALI files
1183       --  are copied. If attribute Library_ALI_Dir is not specified, ALI files
1184       --  are copied in the Library_Dir.
1185
1186       Lib_Internal_Name : Name_Id := No_Name;
1187       --  If a library project, internal name store inside the library
1188
1189       Standalone_Library : Boolean := False;
1190       --  Indicate that this is a Standalone Library Project File
1191
1192       Lib_Interface_ALIs : String_List_Id := Nil_String;
1193       --  For Standalone Library Project Files, indicate the list of Interface
1194       --  ALI files.
1195
1196       Lib_Auto_Init : Boolean := False;
1197       --  For non static Stand-Alone Library Project Files, indicate if
1198       --  the library initialisation should be automatic.
1199
1200       Symbol_Data : Symbol_Record := No_Symbols;
1201       --  Symbol file name, reference symbol file name, symbol policy
1202
1203       Need_To_Build_Lib : Boolean := False;
1204       --  Indicates that the library of a Library Project needs to be built or
1205       --  rebuilt.
1206
1207       -------------
1208       -- Sources --
1209       -------------
1210       --  The sources for all languages including Ada are accessible through
1211       --  the Source_Iterator type
1212
1213       Interfaces_Defined : Boolean := False;
1214       --  True if attribute Interfaces is declared for the project or any
1215       --  project it extends.
1216
1217       Include_Path_File : Path_Name_Type := No_Path;
1218       --  The path name of the of the source search directory file.
1219       --  This is only used by gnatmake
1220
1221       Source_Dirs : String_List_Id := Nil_String;
1222       --  The list of all the source directories
1223
1224       Source_Dir_Ranks : Number_List_Index := No_Number_List;
1225
1226       Ada_Include_Path : String_Access := null;
1227       --  The cached value of source search path for this project file. Set by
1228       --  the first call to Prj.Env.Ada_Include_Path for the project. Do not
1229       --  use this field directly outside of the project manager, use
1230       --  Prj.Env.Ada_Include_Path instead.
1231
1232       Has_Multi_Unit_Sources : Boolean := False;
1233       --  Whether there is at least one source file containing multiple units
1234
1235       -------------------
1236       -- Miscellaneous --
1237       -------------------
1238
1239       Ada_Objects_Path : String_Access := null;
1240       --  The cached value of ADA_OBJECTS_PATH for this project file. Do not
1241       --  use this field directly outside of the compiler, use
1242       --  Prj.Env.Ada_Objects_Path instead.
1243
1244       Libgnarl_Needed : Yes_No_Unknown := Unknown;
1245       --  Set to True when libgnarl is needed to link
1246
1247       Objects_Path : String_Access := null;
1248       --  The cached value of the object dir path, used during the binding
1249       --  phase of gprbuild.
1250
1251       Objects_Path_File_With_Libs : Path_Name_Type := No_Path;
1252       --  The cached value of the object path temp file (including library
1253       --  dirs) for this project file.
1254
1255       Objects_Path_File_Without_Libs : Path_Name_Type := No_Path;
1256       --  The cached value of the object path temp file (excluding library
1257       --  dirs) for this project file.
1258
1259       Config_File_Name : Path_Name_Type := No_Path;
1260       --  The path name of the configuration pragmas file, if any
1261
1262       Config_File_Temp : Boolean := False;
1263       --  An indication that the configuration pragmas file is a temporary file
1264       --  that must be deleted at the end.
1265
1266       Config_Checked : Boolean := False;
1267       --  A flag to avoid checking repetitively the configuration pragmas file
1268
1269       Depth : Natural := 0;
1270       --  The maximum depth of a project in the project graph. Depth of main
1271       --  project is 0.
1272
1273       Unkept_Comments : Boolean := False;
1274       --  True if there are comments in the project sources that cannot be kept
1275       --  in the project tree.
1276
1277    end record;
1278
1279    function Empty_Project return Project_Data;
1280    --  Return the representation of an empty project
1281
1282    function Is_Extending
1283      (Extending : Project_Id;
1284       Extended  : Project_Id) return Boolean;
1285    --  Return True if Extending is extending the Extended project
1286
1287    function Has_Ada_Sources (Data : Project_Id) return Boolean;
1288    --  Return True if the project has Ada sources
1289
1290    Project_Error : exception;
1291    --  Raised by some subprograms in Prj.Attr
1292
1293    package Units_Htable is new Simple_HTable
1294      (Header_Num => Header_Num,
1295       Element    => Unit_Index,
1296       No_Element => No_Unit_Index,
1297       Key        => Name_Id,
1298       Hash       => Hash,
1299       Equal      => "=");
1300    --  Mapping of unit names to indexes in the Units table
1301
1302    ---------------------
1303    -- Source_Iterator --
1304    ---------------------
1305
1306    type Source_Iterator is private;
1307
1308    function For_Each_Source
1309      (In_Tree  : Project_Tree_Ref;
1310       Project  : Project_Id := No_Project;
1311       Language : Name_Id := No_Name) return Source_Iterator;
1312    --  Returns an iterator for all the sources of a project tree, or a specific
1313    --  project, or a specific language.
1314
1315    function Element (Iter : Source_Iterator) return Source_Id;
1316    --  Return the current source (or No_Source if there are no more sources)
1317
1318    procedure Next (Iter : in out Source_Iterator);
1319    --  Move on to the next source
1320
1321    function Find_Source
1322      (In_Tree          : Project_Tree_Ref;
1323       Project          : Project_Id;
1324       In_Imported_Only : Boolean := False;
1325       In_Extended_Only : Boolean := False;
1326       Base_Name        : File_Name_Type) return Source_Id;
1327    --  Find the first source file with the given name either in the whole tree
1328    --  (if In_Imported_Only is False) or in the projects imported or extended
1329    --  by Project otherwise. In_Extended_Only implies In_Imported_Only, and
1330    --  will only look in Project and the projects it extends
1331
1332    -----------------------
1333    -- Project_Tree_Data --
1334    -----------------------
1335
1336    type Private_Project_Tree_Data is private;
1337    --  Data for a project tree that is used only by the Project Manager
1338
1339    type Project_Tree_Data is
1340       record
1341          Name_Lists        : Name_List_Table.Instance;
1342          Number_Lists      : Number_List_Table.Instance;
1343          String_Elements   : String_Element_Table.Instance;
1344          Variable_Elements : Variable_Element_Table.Instance;
1345          Array_Elements    : Array_Element_Table.Instance;
1346          Arrays            : Array_Table.Instance;
1347          Packages          : Package_Table.Instance;
1348          Projects          : Project_List;
1349
1350          Units_HT          : Units_Htable.Instance;
1351          --  Unit name to Unit_Index (and from there so Source_Id)
1352
1353          Source_Paths_HT   : Source_Paths_Htable.Instance;
1354          --  Full path to Source_Id
1355
1356          Private_Part      : Private_Project_Tree_Data;
1357       end record;
1358    --  Data for a project tree
1359
1360    procedure Expect (The_Token : Token_Type; Token_Image : String);
1361    --  Check that the current token is The_Token. If it is not, then output
1362    --  an error message.
1363
1364    procedure Initialize (Tree : Project_Tree_Ref);
1365    --  This procedure must be called before using any services from the Prj
1366    --  hierarchy. Namet.Initialize must be called before Prj.Initialize.
1367
1368    procedure Reset (Tree : Project_Tree_Ref);
1369    --  This procedure resets all the tables that are used when processing a
1370    --  project file tree. Initialize must be called before the call to Reset.
1371
1372    package Project_Boolean_Htable is new Simple_HTable
1373      (Header_Num => Header_Num,
1374       Element    => Boolean,
1375       No_Element => False,
1376       Key        => Project_Id,
1377       Hash       => Hash,
1378       Equal      => "=");
1379    --  A table that associates a project to a boolean. This is used to detect
1380    --  whether a project was already processed for instance.
1381
1382    generic
1383       type State is limited private;
1384       with procedure Action
1385         (Project    : Project_Id;
1386          With_State : in out State);
1387    procedure For_Every_Project_Imported
1388      (By             : Project_Id;
1389       With_State     : in out State;
1390       Imported_First : Boolean := False);
1391    --  Call Action for each project imported directly or indirectly by project
1392    --  By, as well as extended projects.
1393    --  The order of processing depends on Imported_First:
1394    --  If False, Action is called according to the order of importation: if A
1395    --  imports B, directly or indirectly, Action will be called for A before
1396    --  it is called for B. If two projects import each other directly or
1397    --  indirectly (using at least one "limited with"), it is not specified
1398    --  for which of these two projects Action will be called first.
1399    --  The order is reversed if Imported_First is True.
1400    --  With_State may be used by Action to choose a behavior or to report some
1401    --  global result.
1402
1403    function Extend_Name
1404      (File        : File_Name_Type;
1405       With_Suffix : String) return File_Name_Type;
1406    --  Replace the extension of File with With_Suffix
1407
1408    function Object_Name
1409      (Source_File_Name   : File_Name_Type;
1410       Object_File_Suffix : Name_Id := No_Name) return File_Name_Type;
1411    --  Returns the object file name corresponding to a source file name
1412
1413    function Object_Name
1414      (Source_File_Name   : File_Name_Type;
1415       Source_Index       : Int;
1416       Index_Separator    : Character;
1417       Object_File_Suffix : Name_Id := No_Name) return File_Name_Type;
1418    --  Returns the object file name corresponding to a unit in a multi-source
1419    --  file.
1420
1421    function Dependency_Name
1422      (Source_File_Name : File_Name_Type;
1423       Dependency       : Dependency_File_Kind) return File_Name_Type;
1424    --  Returns the dependency file name corresponding to a source file name
1425
1426    function Switches_Name
1427      (Source_File_Name : File_Name_Type) return File_Name_Type;
1428    --  Returns the switches file name corresponding to a source file name
1429
1430    -----------
1431    -- Flags --
1432    -----------
1433
1434    type Processing_Flags is private;
1435    --  Flags used while parsing and processing a project tree to configure the
1436    --  behavior of the parser, and indicate how to report error messages. This
1437    --  structure does not allocate memory and never needs to be freed
1438
1439    type Error_Warning is (Silent, Warning, Error);
1440    --  Severity of some situations, such as: no Ada sources in a project where
1441    --  Ada is one of the language.
1442    --
1443    --  When the situation occurs, the behaviour depends on the setting:
1444    --
1445    --    - Silent:  no action
1446    --    - Warning: issue a warning, does not cause the tool to fail
1447    --    - Error:   issue an error, causes the tool to fail
1448
1449    type Error_Handler is access procedure
1450      (Project    : Project_Id;
1451       Is_Warning : Boolean);
1452    --  This warngs when an error was found when parsing a project. The error
1453    --  itself is handled through Prj.Err (and Prj.Err.Finalize should be called
1454    --  to actually print the error). This ensures that duplicate error messages
1455    --  are always correctly removed, that errors msgs are sorted, and that all
1456    --  tools will report the same error to the user.
1457
1458    function Create_Flags
1459      (Report_Error               : Error_Handler;
1460       When_No_Sources            : Error_Warning;
1461       Require_Sources_Other_Lang : Boolean       := True;
1462       Allow_Duplicate_Basenames  : Boolean       := True;
1463       Compiler_Driver_Mandatory  : Boolean       := False;
1464       Error_On_Unknown_Language  : Boolean       := True;
1465       Require_Obj_Dirs           : Error_Warning := Error;
1466       Allow_Invalid_External     : Error_Warning := Error;
1467       Missing_Source_Files       : Error_Warning := Error)
1468       return Processing_Flags;
1469    --  Function used to create Processing_Flags structure
1470    --
1471    --  If Allow_Duplicate_Basenames, then files with the same base names are
1472    --  authorized within a project for source-based languages (never for unit
1473    --  based languages).
1474    --
1475    --  If Compiler_Driver_Mandatory is true, then a Compiler.Driver attribute
1476    --  for each language must be defined, or we will not look for its source
1477    --  files.
1478    --
1479    --  When_No_Sources indicates what should be done when no sources of a
1480    --  language are found in a project where this language is declared.
1481    --  If Require_Sources_Other_Lang is true, then all languages must have at
1482    --  least one source file, or an error is reported via When_No_Sources. If
1483    --  it is false, this is only required for Ada (and only if it is a language
1484    --  of the project). When this parameter is set to False, we do not check
1485    --  that a proper naming scheme is defined for languages other than Ada.
1486    --
1487    --  If Report_Error is null, use the standard error reporting mechanism
1488    --  (Errout). Otherwise, report errors using Report_Error.
1489    --
1490    --  If Error_On_Unknown_Language is true, an error is displayed if some of
1491    --  the source files listed in the project do not match any naming scheme
1492    --
1493    --  If Require_Obj_Dirs is true, then all object directories must exist
1494    --  (possibly after they have been created automatically if the appropriate
1495    --  switches were specified), or an error is raised.
1496    --
1497    --  If Allow_Invalid_External is Silent, then no error is reported when an
1498    --  invalid value is used for an external variable (and it doesn't match its
1499    --  type). Instead, the first possible value is used.
1500    --
1501    --  Missing_Source_Files indicates whether it is an error or a warning that
1502    --  a source file mentioned in the Source_Files attributes is not actually
1503    --  found in the source directories. This also impacts errors for missing
1504    --  source directories.
1505
1506    Gprbuild_Flags : constant Processing_Flags;
1507    Gprclean_Flags : constant Processing_Flags;
1508    Gnatmake_Flags : constant Processing_Flags;
1509    --  Flags used by the various tools. They all display the error messages
1510    --  through Prj.Err.
1511
1512    ----------------
1513    -- Temp Files --
1514    ----------------
1515
1516    procedure Record_Temp_File
1517      (Tree : Project_Tree_Ref;
1518       Path : Path_Name_Type);
1519    --  Record the path of a newly created temporary file, so that it can be
1520    --  deleted later.
1521
1522    procedure Delete_All_Temp_Files (Tree : Project_Tree_Ref);
1523    --  Delete all recorded temporary files.
1524    --  Does nothing if Debug.Debug_Flag_N is set
1525
1526    procedure Delete_Temporary_File
1527      (Tree : Project_Tree_Ref;
1528       Path : Path_Name_Type);
1529    --  Delete a temporary file from the disk. The file is also removed from the
1530    --  list of temporary files to delete at the end of the program, in case
1531    --  another program running on the same machine has recreated it.
1532    --  Does nothing if Debug.Debug_Flag_N is set
1533
1534    Virtual_Prefix : constant String := "v$";
1535    --  The prefix for virtual extending projects. Because of the '$', which is
1536    --  normally forbidden for project names, there cannot be any name clash.
1537
1538 private
1539
1540    All_Packages : constant String_List_Access := null;
1541
1542    No_Project_Tree : constant Project_Tree_Ref := null;
1543
1544    Ignored : constant Variable_Kind := Single;
1545
1546    Nil_Variable_Value : constant Variable_Value :=
1547                           (Project  => No_Project,
1548                            Kind     => Undefined,
1549                            Location => No_Location,
1550                            Default  => False);
1551
1552    type Source_Iterator is record
1553       In_Tree : Project_Tree_Ref;
1554
1555       Project      : Project_List;
1556       All_Projects : Boolean;
1557       --  Current project and whether we should move on to the next
1558
1559       Language : Language_Ptr;
1560       --  Current language processed
1561
1562       Language_Name : Name_Id;
1563       --  Only sources of this language will be returned (or all if No_Name)
1564
1565       Current : Source_Id;
1566    end record;
1567
1568    procedure Add_To_Buffer
1569      (S    : String;
1570       To   : in out String_Access;
1571       Last : in out Natural);
1572    --  Append a String to the Buffer
1573
1574    package Temp_Files_Table is new GNAT.Dynamic_Tables
1575      (Table_Component_Type => Path_Name_Type,
1576       Table_Index_Type     => Integer,
1577       Table_Low_Bound      => 1,
1578       Table_Initial        => 10,
1579       Table_Increment      => 10);
1580    --  Table to store the path name of all the created temporary files, so that
1581    --  they can be deleted at the end, or when the program is interrupted.
1582
1583    type Private_Project_Tree_Data is record
1584       Temp_Files   : Temp_Files_Table.Instance;
1585       --  Temporary files created as part of running tools (pragma files,
1586       --  mapping files,...)
1587
1588       Current_Source_Path_File : Path_Name_Type := No_Path;
1589       --  Current value of project source path file env var. Used to avoid
1590       --  setting the env var to the same value. When different from No_Path,
1591       --  this indicates that logical names (VMS) or environment variables were
1592       --  created and should be deassigned to avoid polluting the environment
1593       --  on VMS.
1594       --  gnatmake only
1595
1596       Current_Object_Path_File : Path_Name_Type := No_Path;
1597       --  Current value of project object path file env var. Used to avoid
1598       --  setting the env var to the same value.
1599       --  gnatmake only
1600
1601    end record;
1602    --  Type to represent the part of a project tree which is private to the
1603    --  Project Manager.
1604
1605    type Processing_Flags is record
1606       Require_Sources_Other_Lang : Boolean;
1607       Report_Error               : Error_Handler;
1608       When_No_Sources            : Error_Warning;
1609       Allow_Duplicate_Basenames  : Boolean;
1610       Compiler_Driver_Mandatory  : Boolean;
1611       Error_On_Unknown_Language  : Boolean;
1612       Require_Obj_Dirs           : Error_Warning;
1613       Allow_Invalid_External     : Error_Warning;
1614       Missing_Source_Files       : Error_Warning;
1615    end record;
1616
1617    Gprbuild_Flags : constant Processing_Flags :=
1618      (Report_Error               => null,
1619       When_No_Sources            => Warning,
1620       Require_Sources_Other_Lang => True,
1621       Allow_Duplicate_Basenames  => False,
1622       Compiler_Driver_Mandatory  => True,
1623       Error_On_Unknown_Language  => True,
1624       Require_Obj_Dirs           => Error,
1625       Allow_Invalid_External     => Error,
1626       Missing_Source_Files       => Error);
1627
1628    Gprclean_Flags : constant Processing_Flags :=
1629      (Report_Error               => null,
1630       When_No_Sources            => Warning,
1631       Require_Sources_Other_Lang => True,
1632       Allow_Duplicate_Basenames  => False,
1633       Compiler_Driver_Mandatory  => True,
1634       Error_On_Unknown_Language  => True,
1635       Require_Obj_Dirs           => Warning,
1636       Allow_Invalid_External     => Error,
1637       Missing_Source_Files       => Error);
1638
1639    Gnatmake_Flags : constant Processing_Flags :=
1640      (Report_Error               => null,
1641       When_No_Sources            => Error,
1642       Require_Sources_Other_Lang => False,
1643       Allow_Duplicate_Basenames  => False,
1644       Compiler_Driver_Mandatory  => False,
1645       Error_On_Unknown_Language  => False,
1646       Require_Obj_Dirs           => Error,
1647       Allow_Invalid_External     => Error,
1648       Missing_Source_Files       => Error);
1649
1650 end Prj;