1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- O P T -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2004, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 2, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNAT; see file COPYING. If not, write -- 19-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- 20-- MA 02111-1307, USA. -- 21-- -- 22-- As a special exception, if other files instantiate generics from this -- 23-- unit, or you link this unit with other files to produce an executable, -- 24-- this unit does not by itself cause the resulting executable to be -- 25-- covered by the GNU General Public License. This exception does not -- 26-- however invalidate any other reasons why the executable file might be -- 27-- covered by the GNU Public License. -- 28-- -- 29-- GNAT was originally developed by the GNAT team at New York University. -- 30-- Extensive contributions were provided by Ada Core Technologies Inc. -- 31-- -- 32------------------------------------------------------------------------------ 33 34-- This package contains global flags set by the initialization 35-- routine from the command line and referenced throughout the compiler, 36-- the binder, gnatmake or other GNAT tools. The comments indicate which 37-- options are used by which programs (GNAT, GNATBIND, GNATMAKE, etc). 38 39with Gnatvsn; use Gnatvsn; 40with Hostparm; use Hostparm; 41with Types; use Types; 42 43with System.WCh_Con; use System.WCh_Con; 44with GNAT.Strings; use GNAT.Strings; 45 46package Opt is 47 48 ---------------------------------------------- 49 -- Settings of Modes for Current Processing -- 50 ---------------------------------------------- 51 52 -- The following mode values represent the current state of processing. 53 -- The values set here are the default values. Unless otherwise noted, 54 -- the value may be reset in Switch with an appropropiate switch. In 55 -- some cases, the values can also be modified by pragmas, and in the 56 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify 57 -- the default values. 58 59 Ada_Bind_File : Boolean := True; 60 -- GNATBIND, GNATLINK 61 -- Set True if binder file to be generated in Ada rather than C 62 63 Ada_95 : Boolean := True; 64 -- GNAT 65 -- Set True if operating in Ada 95 mode 66 -- Set False if operating in Ada 83 mode 67 68 Ada_83 : Boolean := False; 69 -- GNAT 70 -- Set True if operating in Ada 83 mode 71 -- Set False if operating in Ada 95 mode 72 73 Ada_Final_Suffix : constant String := "final"; 74 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix); 75 -- GNATBIND 76 -- The name of the procedure that performs the finalization at the end of 77 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 78 79 Ada_Init_Suffix : constant String := "init"; 80 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix); 81 -- GNATBIND 82 -- The name of the procedure that performs initialization at the start 83 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 84 85 Ada_Main_Name_Suffix : constant String := "main"; 86 -- GNATBIND 87 -- The suffix for Ada_Main_Name. Defined as a constant here so that it 88 -- can be referenced in a uniform manner to create either the default 89 -- value of Ada_Main_Name (declared below), or the non-default name 90 -- set by Gnatbind.Scan_Bind_Arg. 91 92 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix); 93 -- GNATBIND 94 -- The name of the Ada package generated by the binder (when in Ada mode). 95 -- This variable may be modified by Gnatbind.Scan_Bind_Arg. 96 97 Address_Clause_Overlay_Warnings : Boolean := True; 98 -- GNAT 99 -- Set False to disable address clause warnings 100 101 All_Errors_Mode : Boolean := False; 102 -- GNAT 103 -- Flag set to force display of multiple errors on a single line and 104 -- also repeated error messages for references to undefined identifiers 105 -- and certain other repeated error messages. 106 107 All_Sources : Boolean := False; 108 -- GNATBIND 109 -- Set to True to require all source files to be present. This flag is 110 -- directly modified by gnatmake to affect the shared binder routines. 111 112 Alternate_Main_Name : String_Ptr := null; 113 -- GNATBIND 114 -- Set to non null when Bind_Alternate_Main_Name is True. This value 115 -- is modified as needed by Gnatbind.Scan_Bind_Arg. 116 117 Assertions_Enabled : Boolean := False; 118 -- GNAT 119 -- Enable assertions made using pragma Assert. 120 121 ASIS_Mode : Boolean := False; 122 -- GNAT 123 -- Enable semantic checks and tree transformations that are important 124 -- for ASIS but that are usually skipped if Operating_Mode is set to 125 -- Check_Semantics. This flag does not have the corresponding option to set 126 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON 127 -- from the code of GNSA-based tool (a client may need to set ON the 128 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not 129 -- make very much sense, because GNSA can not do back annotation). 130 131 Back_Annotate_Rep_Info : Boolean := False; 132 -- GNAT 133 -- If set True, enables back annotation of representation information 134 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR 135 -- (list representation information) or -gnatt (generate tree). It is 136 -- also set true if certain Unchecked_Conversion instantiations require 137 -- checking based on annotated values. 138 139 Bind_Alternate_Main_Name : Boolean := False; 140 -- GNATBIND 141 -- True if main should be called Alternate_Main_Name.all. 142 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg. 143 144 Bind_Main_Program : Boolean := True; 145 -- GNATBIND 146 -- Set to False if not binding main Ada program. 147 148 Bind_For_Library : Boolean := False; 149 -- GNATBIND 150 -- Set to True if the binder needs to generate a file designed for 151 -- building a library. May be set to True by Gnatbind.Scan_Bind_Arg. 152 153 Bind_Only : Boolean := False; 154 -- GNATMAKE 155 -- Set to True to skip compile and link steps 156 -- (except when Compile_Only and/or Link_Only are True). 157 158 Blank_Deleted_Lines : Boolean := False; 159 -- GNAT, GNATPREP 160 -- Output empty lines for each line of preprocessed input that is deleted 161 -- in the output, including preprocessor lines starting with a '#'. 162 163 Brief_Output : Boolean := False; 164 -- GNAT, GNATBIND 165 -- Force brief error messages to standard error, even if verbose mode is 166 -- set (so that main error messages go to standard output). 167 168 Build_Bind_And_Link_Full_Project : Boolean := False; 169 -- GNATMAKE 170 -- Set to True to build, bind and link all the sources of a project file 171 -- (switch -B) 172 173 Check_Object_Consistency : Boolean := False; 174 -- GNATBIND, GNATMAKE 175 -- Set to True to check whether every object file is consistent with 176 -- its corresponding ada library information (ALI) file. An object 177 -- file is inconsistent with the corresponding ALI file if the object 178 -- file does not exist or if it has an older time stamp than the ALI file. 179 -- Default above is for GNATBIND. GNATMAKE overrides this default to 180 -- True (see Make.Initialize) since we normally do need to check source 181 -- consistencies in gnatmake. 182 183 Check_Only : Boolean := False; 184 -- GNATBIND 185 -- Set to True to do checks only, no output of binder file. 186 187 Check_Readonly_Files : Boolean := False; 188 -- GNATMAKE 189 -- Set to True to check readonly files during the make process. 190 191 Check_Source_Files : Boolean := True; 192 -- GNATBIND, GNATMAKE 193 -- Set to True to enable consistency checking for any source files that 194 -- are present (i.e. date must match the date in the library info file). 195 -- Set to False for object file consistency check only. This flag is 196 -- directly modified by gnatmake, to affect the shared binder routines. 197 198 Check_Switches : Boolean := False; 199 -- GNATMAKE 200 -- Set to True to check compiler options during the make process. 201 202 Check_Unreferenced : Boolean := False; 203 -- GNAT 204 -- Set to True to enable checking for unreferenced entities other 205 -- than formal parameters (for which see Check_Unreferenced_Formals) 206 207 Check_Unreferenced_Formals : Boolean := False; 208 -- GNAT 209 -- Set True to check for unreferenced formals. This is turned 210 -- on by -gnatwa/wf/wu and turned off by -gnatwA/wF/wU. 211 212 Check_Withs : Boolean := False; 213 -- GNAT 214 -- Set to True to enable checking for unused withs, and also the case 215 -- of withing a package and using none of the entities in the package. 216 217 Comment_Deleted_Lines : Boolean := False; 218 -- GNATPREP 219 -- True if source lines removed by the preprocessor should be commented 220 -- in the output file. 221 222 Compile_Only : Boolean := False; 223 -- GNATMAKE, GNATCLEAN 224 -- GNATMAKE: set to True to skip bind and link steps (except when 225 -- Bind_Only is True). 226 -- GNATCLEAN: set to True to only the files produced by the compiler are to 227 -- be deleted, but not the library files or executable files. 228 229 Config_File : Boolean := True; 230 -- GNAT 231 -- Set to False to inhibit reading and processing of gnat.adc file 232 233 Config_File_Names : String_List_Access := null; 234 -- GNAT 235 -- Names of configuration pragmas files (given by switches -gnatec) 236 237 Configurable_Run_Time_Mode : Boolean := False; 238 -- GNAT, GNATBIND 239 -- Set True if the compiler is operating in configurable run-time mode. 240 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target 241 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind 242 -- for details on the handling of the latter pragma. 243 244 Constant_Condition_Warnings : Boolean := False; 245 -- GNAT 246 -- Set to True to activate warnings on constant conditions 247 248 Create_Mapping_File : Boolean := False; 249 -- GNATMAKE 250 -- Set to True (-C switch) to indicate that gnatmake 251 -- invokes the compiler with a mapping file (-gnatem compiler switch). 252 253 subtype Debug_Level_Value is Nat range 0 .. 3; 254 Debugger_Level : Debug_Level_Value := 0; 255 -- GNATBIND 256 -- The value given to the -g parameter. 257 -- The default value for -g with no value is 2 258 -- This is usually ignored by GNATBIND, except in the VMS version 259 -- where it is passed as an argument to __gnat_initialize to trigger 260 -- the activation of the remote debugging interface (is this true???). 261 262 Debug_Generated_Code : Boolean := False; 263 -- GNAT 264 -- Set True (-gnatD switch) to debug generated expanded code instead 265 -- of the original source code. Causes debugging information to be 266 -- written with respect to the generated code file that is written. 267 268 Default_Sec_Stack_Size : Int := -1; 269 -- GNATBIND 270 -- Set to default secondary stack size in units of kilobytes. Set by 271 -- the -Dnnn switch for the binder. A value of -1 indicates that no 272 -- default was set by the binder, and that the default should be the 273 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size. 274 275 Display_Compilation_Progress : Boolean := False; 276 -- GNATMAKE 277 -- Set True (-d switch) to display information on progress while compiling 278 -- files. Internal flag to be used in conjunction with an IDE such as 279 -- Glide. 280 281 type Distribution_Stub_Mode_Type is 282 -- GNAT 283 (No_Stubs, 284 -- Normal mode, no generation/compilation of distribution stubs 285 286 Generate_Receiver_Stub_Body, 287 -- The unit being compiled is the RCI body, and the compiler will 288 -- generate the body for the receiver stubs and compile it. 289 290 Generate_Caller_Stub_Body); 291 -- The unit being compiled is the RCI spec, and the compiler will 292 -- generate the body for the caller stubs and compile it. 293 294 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs; 295 -- GNAT 296 -- This enumeration variable indicates the five states of distribution 297 -- annex stub generation/compilation. 298 299 Do_Not_Execute : Boolean := False; 300 -- GNATMAKE 301 -- Set to True if no actual compilations should be undertaken. 302 303 Dynamic_Elaboration_Checks : Boolean := False; 304 -- GNAT 305 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 306 -- switch or by the use of pragma Elaboration_Checks (Dynamic). 307 308 Elab_Dependency_Output : Boolean := False; 309 -- GNATBIND 310 -- Set to True to output complete list of elaboration constraints 311 312 Elab_Order_Output : Boolean := False; 313 -- GNATBIND 314 -- Set to True to output chosen elaboration order 315 316 Elab_Warnings : Boolean := False; 317 -- GNAT 318 -- Set to True to generate full elaboration warnings (-gnatwl) 319 320 Enable_Overflow_Checks : Boolean := False; 321 -- GNAT 322 -- Set to True if -gnato (enable overflow checks) switch is set, 323 -- but not -gnatp. 324 325 Exception_Locations_Suppressed : Boolean := False; 326 -- GNAT 327 -- This flag is set True if a Suppress_Exception_Locations configuration 328 -- pragma is currently active. 329 330 type Exception_Mechanism_Type is 331 -- Determines the handling of exceptions. See Exp_Ch11 for details 332 -- 333 (Front_End_Setjmp_Longjmp_Exceptions, 334 -- Exceptions use setjmp/longjmp generated explicitly by the 335 -- front end (this includes gigi or other equivalent parts of 336 -- the code generator). AT END handlers are converted into 337 -- exception handlers by the front end in this mode. 338 339 Front_End_ZCX_Exceptions, 340 -- Exceptions use the zero cost table mechanism with explicit 341 -- tables and exception regions generated by the front end. 342 -- AT END handlers are converted into exception handlers by 343 -- the front end in this mode. 344 345 Back_End_ZCX_Exceptions); 346 -- Exceptions are handled by the back end. The front end simply 347 -- generates the handlers as they appear in the source, and AT 348 -- END handlers are left untouched (they are not converted into 349 -- exception handlers when operating in this mode. Note that the 350 -- name includes ZCX, since the expectation is that the back end 351 -- mechanism will in fact be a ZCX approach, but nothing in the 352 -- compiler depends on this, so for example if GNAT is run with 353 -- a version of GCC configured for setjmp/longjmp exception handling, 354 -- then everything will work fine. 355 pragma Convention (C, Exception_Mechanism_Type); 356 357 Exception_Mechanism : Exception_Mechanism_Type := 358 Front_End_Setjmp_Longjmp_Exceptions; 359 -- GNAT 360 -- Set to the appropriate value depending on the default as given in 361 -- system.ads (ZCX_By_Default, GCC_ZCX_Support, Front_End_ZCX_Support) 362 -- and the use of -gnatL -gnatZ (and -gnatdX). The C convention is 363 -- there to make this variable accessible to gigi. 364 365 Exception_Tracebacks : Boolean := False; 366 -- GNATBIND 367 -- Set to True to store tracebacks in exception occurrences (-E) 368 369 Extensions_Allowed : Boolean := False; 370 -- GNAT 371 -- Set to True by switch -gnatX if GNAT specific language extensions 372 -- are allowed. For example, "with type" is a GNAT extension. 373 374 type External_Casing_Type is ( 375 As_Is, -- External names cased as they appear in the Ada source 376 Uppercase, -- External names forced to all uppercase letters 377 Lowercase); -- External names forced to all lowercase letters 378 379 External_Name_Imp_Casing : External_Casing_Type := Lowercase; 380 -- GNAT 381 -- The setting of this flag determines the casing of external names 382 -- when the name is implicitly derived from an entity name (i.e. either 383 -- no explicit External_Name or Link_Name argument is used, or, in the 384 -- case of extended DEC pragmas, the external name is given using an 385 -- identifier. The As_Is setting is not permitted here (since this would 386 -- create Ada source programs that were case sensitive). 387 388 External_Name_Exp_Casing : External_Casing_Type := As_Is; 389 -- GNAT 390 -- The setting of this flag determines the casing of an external name 391 -- specified explicitly with a string literal. As_Is means the string 392 -- literal is used as given with no modification to the casing. If 393 -- Lowercase or Uppercase is set, then the string is forced to all 394 -- lowercase or all uppercase letters as appropriate. Note that this 395 -- setting has no effect if the external name is given using an identifier 396 -- in the case of extended DEC import/export pragmas (in this case the 397 -- casing is controlled by External_Name_Imp_Casing), and also has no 398 -- effect if an explicit Link_Name is supplied (a link name is always 399 -- used exactly as given). 400 401 Float_Format : Character := ' '; 402 -- GNAT 403 -- A non-blank value indicates that a Float_Format pragma has been 404 -- processed, in which case this variable is set to 'I' for IEEE or 405 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS 406 -- versions of GNAT. 407 408 Float_Format_Long : Character := ' '; 409 -- GNAT 410 -- A non-blank value indicates that a Long_Float pragma has been 411 -- processed (this pragma is recognized only in OpenVMS versions 412 -- of GNAT), in which case this variable is set to D or G for 413 -- D_Float or G_Float. 414 415 Force_ALI_Tree_File : Boolean := False; 416 -- GNAT 417 -- Force generation of ALI file even if errors are encountered. 418 -- Also forces generation of tree file if -gnatt is also set. 419 420 Force_Checking_Of_Elaboration_Flags : Boolean := False; 421 -- GNATBIND 422 -- True if binding with forced checking of the elaboration flags 423 -- (-F switch set). 424 425 Force_Compilations : Boolean := False; 426 -- GNATMAKE 427 -- Set to force recompilations even when the objects are up-to-date. 428 429 Force_RM_Elaboration_Order : Boolean := False; 430 -- GNATBIND 431 -- True if binding with forced RM elaboration order (-f switch set) 432 -- Note: this is considered an obsolescent option, to be removed in 433 -- some future release. It is no longer documented. The proper way 434 -- to get this effect is to use -gnatE and suppress elab checks. 435 436 Full_Path_Name_For_Brief_Errors : Boolean := False; 437 -- GNAT, GNATMAKE, GNATCLEAN 438 -- When True, in Brief_Output mode, each error message line 439 -- will start with the full path name of the source. 440 -- When False, only the file name without directory information 441 -- is used. 442 443 Full_List : Boolean := False; 444 -- GNAT 445 -- Set True to generate full source listing with embedded errors 446 447 function get_gcc_version return Int; 448 pragma Import (C, get_gcc_version, "get_gcc_version"); 449 450 GCC_Version : constant Nat := get_gcc_version; 451 -- GNATMAKE 452 -- Indicates which version of gcc is in use (2 = 2.8.1, 3 = 3.x). 453 -- Used in particular to decide if gcc switch -shared-libgcc should be 454 -- used (it cannot be used for 2.8.1). 455 456 Global_Discard_Names : Boolean := False; 457 -- GNAT, GNATBIND 458 -- Set true if a pragma Discard_Names applies to the current unit 459 460 GNAT_Mode : Boolean := False; 461 -- GNAT 462 -- True if compiling in GNAT system mode (-gnatg switch) 463 464 HLO_Active : Boolean := False; 465 -- GNAT 466 -- True if High Level Optimizer is activated (-gnatH switch) 467 468 Implementation_Unit_Warnings : Boolean := True; 469 -- GNAT 470 -- Set True to active warnings for use of implementation internal units. 471 -- Can be controlled by use of -gnatwi/-gnatwI. 472 473 Identifier_Character_Set : Character; 474 -- GNAT 475 -- This variable indicates the character set to be used for identifiers. 476 -- The possible settings are: 477 -- '1' Latin-5 (ISO-8859-1) 478 -- '2' Latin-5 (ISO-8859-2) 479 -- '3' Latin-5 (ISO-8859-3) 480 -- '4' Latin-5 (ISO-8859-4) 481 -- '5' Latin-5 (ISO-8859-5, Cyrillic) 482 -- '9' Latin-5 (ISO-8859-9) 483 -- 'p' PC (US, IBM page 437) 484 -- '8' PC (European, IBM page 850) 485 -- 'f' Full upper set (all distinct) 486 -- 'n' No upper characters (Ada/83 rules) 487 -- 'w' Latin-1 plus wide characters allowed in identifiers 488 -- 489 -- The setting affects the set of letters allowed in identifiers and the 490 -- upper/lower case equivalences. It does not affect the interpretation of 491 -- character and string literals, which are always stored using the actual 492 -- coding in the source program. This variable is initialized to the 493 -- default value appropriate to the system (in Osint.Initialize), and then 494 -- reset if a command line switch is used to change the setting. 495 496 Ineffective_Inline_Warnings : Boolean := False; 497 -- GNAT 498 -- Set True to activate warnings if front-end inlining (-gnatN) is not 499 -- able to actually inline a particular call (or all calls). Can be 500 -- controlled by use of -gnatwp/-gnatwP. 501 502 Init_Or_Norm_Scalars : Boolean := False; 503 -- GNAT, GANTBIND 504 -- Set True if a pragma Initialize_Scalars applies to the current unit. 505 -- Also set True if a pragma Normalize_Scalars applies. 506 507 Initialize_Scalars : Boolean := False; 508 -- GNAT 509 -- Set True if a pragma Initialize_Scalars applies to the current unit. 510 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 511 512 Initialize_Scalars_Mode1 : Character := 'I'; 513 Initialize_Scalars_Mode2 : Character := 'N'; 514 -- GNATBIND 515 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default 516 -- is IN (invalid values), used if no -S switch is used. 517 518 Inline_Active : Boolean := False; 519 -- GNAT 520 -- Set True to activate pragma Inline processing across modules. Default 521 -- for now is not to inline across module boundaries. 522 523 Interface_Library_Unit : Boolean := False; 524 -- GNATBIND 525 -- Set to True to indicate that at least one ALI file is an interface ALI: 526 -- then elaboration flag checks are to be generated in the binder 527 -- generated file. 528 529 Front_End_Inlining : Boolean := False; 530 -- GNAT 531 -- Set True to activate inlining by front-end expansion. 532 533 Inline_Processing_Required : Boolean := False; 534 -- GNAT 535 -- Set True if inline processing is required. Inline processing is 536 -- required if an active Inline pragma is processed. The flag is set 537 -- for a pragma Inline or Inline_Always that is actually active. 538 539 In_Place_Mode : Boolean := False; 540 -- GNATMAKE 541 -- Set True to store ALI and object files in place ie in the object 542 -- directory if these files already exist or in the source directory 543 -- if not. 544 545 Keep_Going : Boolean := False; 546 -- GNATMAKE 547 -- When True signals gnatmake to ignore compilation errors and keep 548 -- processing sources until there is no more work. 549 550 Link_Only : Boolean := False; 551 -- GNATMAKE 552 -- Set to True to skip compile and bind steps 553 -- (except when Bind_Only is set to True). 554 555 List_Restrictions : Boolean := False; 556 -- GNATBIND 557 -- Set to True to list restrictions pragmas that could apply to partition 558 559 List_Units : Boolean := False; 560 -- GNAT 561 -- List units in the active library for a compilation (-gnatu switch) 562 563 List_Dependencies : Boolean := False; 564 -- GNATMAKE 565 -- When True gnatmake verifies that the objects are up to date and 566 -- outputs the list of object dependencies (-M switch). 567 -- Output depends if -a switch is used or not. 568 -- This list can be used directly in a Makefile. 569 570 List_Representation_Info : Int range 0 .. 3 := 0; 571 -- GNAT 572 -- Set non-zero by -gnatR switch to list representation information. 573 -- The settings are as follows: 574 -- 575 -- 0 = no listing of representation information (default as above) 576 -- 1 = list rep info for user defined record and array types 577 -- 2 = list rep info for all user defined types and objects 578 -- 3 = like 2, but variable fields are decoded symbolically 579 580 List_Representation_Info_To_File : Boolean := False; 581 -- GNAT 582 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3 583 -- to be written to file.rep (where file is the name of the source 584 -- file) instead of stdout. For example, if file x.adb is compiled 585 -- using -gnatR2s then representation info is written to x.adb.ref. 586 587 List_Representation_Info_Mechanisms : Boolean := False; 588 -- GNAT 589 -- Set true by -gnatRm switch. Causes information on mechanisms to 590 -- be included in the representation output information. 591 592 List_Preprocessing_Symbols : Boolean := False; 593 -- GNAT, GNATPREP 594 -- Set to True if symbols for preprocessing a source are to be listed 595 -- before preprocessing occurs. Set to True by switch -s of gnatprep 596 -- or -s in preprocessing data file for the compiler. 597 598 type Creat_Repinfo_File_Proc is access procedure (Src : File_Name_Type); 599 type Write_Repinfo_Line_Proc is access procedure (Info : String); 600 type Close_Repinfo_File_Proc is access procedure; 601 -- Types used for procedure addresses below 602 603 Creat_Repinfo_File_Access : Creat_Repinfo_File_Proc := null; 604 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null; 605 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null; 606 -- GNAT 607 -- These three locations are left null when operating in non-compiler 608 -- (e.g. ASIS mode), but when operating in compiler mode, they are 609 -- set to point to the three corresponding procedures in Osint. The 610 -- reason for this slightly strange interface is to prevent Repinfo 611 -- from dragging in Osint in ASIS mode, which would include a lot of 612 -- unwanted units in the ASIS build. 613 614 Locking_Policy : Character := ' '; 615 -- GNAT, GNATBIND 616 -- Set to ' ' for the default case (no locking policy specified). 617 -- Reset to first character (uppercase) of locking policy name if a 618 -- valid pragma Locking_Policy is encountered. 619 620 Locking_Policy_Sloc : Source_Ptr := No_Location; 621 -- GNAT, GNATBIND 622 -- Remember location of previous Locking_Policy pragma. This is used 623 -- for inconsistency error messages. A value of System_Location is 624 -- used if the policy is set in package System. 625 626 Look_In_Primary_Dir : Boolean := True; 627 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN 628 -- Set to False if a -I- was present on the command line. 629 -- When True we are allowed to look in the primary directory to locate 630 -- other source or library files. 631 632 Make_Steps : Boolean := False; 633 -- GNATMAKE 634 -- Set to True when either Compile_Only, Bind_Only or Link_Only is 635 -- set to True. 636 637 Mapping_File_Name : String_Ptr := null; 638 -- GNAT 639 -- File name of mapping between unit names, file names and path names. 640 -- (given by switch -gnatem) 641 642 Maximum_Errors : Int := 9999; 643 -- GNAT, GNATBIND 644 -- Maximum default number of errors before compilation is terminated. 645 -- Can be overridden using -gnatm (GNAT) or -m (GNATBIND) switch. 646 647 Maximum_File_Name_Length : Int; 648 -- GNAT, GNATBIND 649 -- Maximum number of characters allowed in a file name, not counting the 650 -- extension, as set by the appropriate switch. If no switch is given, 651 -- then this value is initialized by Osint to the appropriate value. 652 653 Maximum_Processes : Positive := 1; 654 -- GNATMAKE 655 -- Maximum number of processes that should be spawned to carry out 656 -- compilations. 657 658 Minimal_Recompilation : Boolean := False; 659 -- GNATMAKE 660 -- Set to True if minimal recompilation mode requested. 661 662 No_Stdlib : Boolean := False; 663 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF 664 -- Set to True if no default library search dirs added to search list. 665 666 No_Stdinc : Boolean := False; 667 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF 668 -- Set to True if no default source search dirs added to search list. 669 670 No_Main_Subprogram : Boolean := False; 671 -- GNATMAKE, GNATBIND 672 -- Set to True if compilation/binding of a program without main 673 -- subprogram requested. 674 675 No_Run_Time_Mode : Boolean := False; 676 -- GNAT, GNATBIND 677 -- This flag is set True if a No_Run_Time pragma is encountered. See 678 -- spec of Rtsfind for a full description of handling of this pragma. 679 680 Normalize_Scalars : Boolean := False; 681 -- GNAT, GNATBIND 682 -- Set True if a pragma Normalize_Scalars applies to the current unit. 683 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 684 685 Object_Directory_Present : Boolean := False; 686 -- GNATMAKE 687 -- Set to True when an object directory is specified with option -D 688 689 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code); 690 Operating_Mode : Operating_Mode_Type := Generate_Code; 691 -- GNAT 692 -- Indicates the operating mode of the compiler. The default is generate 693 -- code, which runs the parser, semantics and backend. Switches can be 694 -- used to set syntax checking only mode, or syntax and semantics checking 695 -- only mode. Operating_Mode can also be modified as a result of detecting 696 -- errors during the compilation process. In particular if any serious 697 -- error is detected then this flag is reset from Generate_Code to 698 -- Check_Semantics after generating an error message. 699 700 Original_Operating_Mode : Operating_Mode_Type := Generate_Code; 701 -- GNAT 702 -- Indicates the original operating mode of the compiler as set by 703 -- compiler options. This is identical to Operating_Mode except that 704 -- this is not affected by errors. 705 706 Optimization_Level : Int; 707 pragma Import (C, Optimization_Level, "optimize"); 708 -- This constant reflects the optimization level (0,1,2 for -O0,-O1,-O2) 709 710 Output_File_Name_Present : Boolean := False; 711 -- GNATBIND, GNAT, GNATMAKE 712 -- Set to True when the output C file name is given with option -o 713 -- for GNATBIND, when the object file name is given with option 714 -- -gnatO for GNAT or when the executable is given with option -o 715 -- for GNATMAKE. 716 717 Output_Linker_Option_List : Boolean := False; 718 -- GNATBIND 719 -- True if output of list of linker options is requested (-K switch set) 720 721 Output_Object_List : Boolean := False; 722 -- GNATBIND 723 -- True if output of list of objects is requested (-O switch set) 724 725 Pessimistic_Elab_Order : Boolean := False; 726 -- GNATBIND 727 -- True if pessimistic elaboration order is to be chosen (-p switch set) 728 729 Polling_Required : Boolean := False; 730 -- GNAT 731 -- Set to True if polling for asynchronous abort is enabled by using 732 -- the -gnatP option for GNAT. 733 734 Preprocessing_Data_File : String_Ptr := null; 735 -- GNAT 736 -- Set by switch -gnatep=. The file name of the prepocessing data file. 737 738 Print_Generated_Code : Boolean := False; 739 -- GNAT 740 -- Set to True to enable output of generated code in source form. This 741 -- flag is set by the -gnatG switch. 742 743 Print_Standard : Boolean := False; 744 -- GNAT 745 -- Set to true to enable printing of package standard in source form. 746 -- This flag is set by the -gnatS switch 747 748 Propagate_Exceptions : Boolean := False; 749 -- GNAT 750 -- Indicates if subprogram descriptor exception tables should be 751 -- built for imported subprograms. Set True if a Propagate_Exceptions 752 -- pragma applies to the extended main unit. 753 754 type Usage is (Unknown, Not_In_Use, In_Use); 755 Project_File_In_Use : Usage := Unknown; 756 -- GNAT 757 -- Indicates if a project file is used or not. 758 -- Set to In_Use by the first SFNP pragma. 759 760 Queuing_Policy : Character := ' '; 761 -- GNAT, GNATBIND 762 -- Set to ' ' for the default case (no queuing policy specified). 763 -- Reset to first character (uppercase) of locking policy name if a valid 764 -- Queuing_Policy pragma is encountered. 765 766 Queuing_Policy_Sloc : Source_Ptr := No_Location; 767 -- GNAT, GNATBIND 768 -- Remember location of previous Queuing_Policy pragma. This is used 769 -- for inconsistency error messages. A value of System_Location is 770 -- used if the policy is set in package System. 771 772 Quiet_Output : Boolean := False; 773 -- GNATMAKE, GNATCLEAN, GPR2MAKE 774 -- Set to True if the tool should not have any output if there are no 775 -- errors or warnings. 776 777 RTS_Lib_Path_Name : String_Ptr := null; 778 RTS_Src_Path_Name : String_Ptr := null; 779 -- GNAT 780 -- Set to the "adalib" and "adainclude" directories of the run time 781 -- specified by --RTS=. 782 783 RTS_Switch : Boolean := False; 784 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF 785 -- Set to True when the --RTS switch is set 786 787 Run_Path_Option : Boolean := True; 788 -- GNATMAKE, GNATLINK 789 -- Set to False when no run_path_option should be issued to the linker 790 791 Sec_Stack_Used : Boolean := False; 792 -- GNAT, GBATBIND 793 -- Set True if generated code uses the System.Secondary_Stack package. 794 -- For the binder, set if any unit uses the secondary stack package. 795 796 Shared_Libgnat : Boolean; 797 -- GNATBIND 798 -- Set to True if a shared libgnat is requested by using the -shared 799 -- option for GNATBIND and to False when using the -static option. The 800 -- value of this flag is set by Gnatbind.Scan_Bind_Arg. 801 802 Stack_Checking_Enabled : Boolean; 803 -- GNAT 804 -- Set to indicate if -fstack-check switch is set for the compilation. 805 -- True means that the switch is set, so that stack checking is enabled. 806 -- False means that the switch is not set (no stack checking). This 807 -- value is obtained from the external imported value flag_stack_check 808 -- in the gcc backend (see Frontend) and may be referenced throughout 809 -- the compilation phases. 810 811 Style_Check : Boolean := False; 812 -- GNAT 813 -- Set True to perform style checks. Activates checks carried out 814 -- in package Style (see body of this package for details of checks) 815 -- This flag is set True by either the -gnatg or -gnaty switches. 816 817 System_Extend_Pragma_Arg : Node_Id := Empty; 818 -- GNAT 819 -- Set non-empty if and only if a correct Extend_System pragma was present 820 -- in which case it points to the argument of the pragma, and the name can 821 -- be located as Chars (Expression (System_Extend_Pragma_Arg)). 822 823 System_Extend_Unit : Node_Id := Empty; 824 -- GNAT 825 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System 826 -- is never appropriate in GNAT_Mode (and causes troubles, including 827 -- bogus circularities, if we try to compile the run-time library with 828 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit 829 -- is a copy of the value set in System_Extend_Pragma_Ary. 830 831 Subunits_Missing : Boolean := False; 832 -- GNAT 833 -- This flag is set true if missing subunits are detected with code 834 -- generation active. This causes code generation to be skipped. 835 836 Suppress_Checks : Boolean := False; 837 -- GNAT 838 -- Set to True if -gnatp (suppress all checks) switch present. 839 840 Suppress_Options : Suppress_Array; 841 -- GNAT 842 -- Flags set True to suppress corresponding check, i.e. add an implicit 843 -- pragma Suppress at the outer level of each unit compiled. Note that 844 -- these suppress actions can be overridden by the use of the Unsuppress 845 -- pragma. This variable is initialized by Osint.Initialize. 846 847 Suppress_Back_Annotation : Boolean := False; 848 -- GNAT 849 -- This flag is set True if back annotation of representation information 850 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set. 851 -- This avoids unnecessary time being spent on back annotation. 852 853 Table_Factor : Int := 1; 854 -- GNAT 855 -- Factor by which all initial table sizes set in Alloc are multiplied. 856 -- Used in Table to calculate initial table sizes (the initial table 857 -- size is the value in Alloc, used as the Table_Initial parameter 858 -- value, multiplied by the factor given here. The default value is 859 -- used if no -gnatT switch appears. 860 861 Task_Dispatching_Policy : Character := ' '; 862 -- GNAT, GNATBIND 863 -- Set to ' ' for the default case (no task dispatching policy specified). 864 -- Reset to first character (uppercase) of task dispatching policy name 865 -- if a valid Task_Dispatching_Policy pragma is encountered. 866 867 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location; 868 -- GNAT, GNATBIND 869 -- Remember location of previous Task_Dispatching_Policy pragma. This is 870 -- used for inconsistency error messages. A value of System_Location is 871 -- used if the policy is set in package System. 872 873 Tasking_Used : Boolean := False; 874 -- Set True if any tasking construct is encountered. Used to activate the 875 -- output of the Q, L and T lines in ALI files. 876 877 Time_Slice_Set : Boolean := False; 878 -- GNATBIND 879 -- Set True if a pragma Time_Slice is processed in the main unit, or 880 -- if the -gnatTnn switch is present to set a time slice value. 881 882 Time_Slice_Value : Nat; 883 -- GNATBIND 884 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if a 885 -- Time_Slice pragma has been processed. Set to the time slice value 886 -- in microseconds. Negative values are stored as zero, and the value 887 -- is not larger than 1_000_000_000 (1000 seconds). Values larger than 888 -- this are reset to this maximum. This can also be set with the -gnatTnn 889 -- switch. 890 891 Tolerate_Consistency_Errors : Boolean := False; 892 -- GNATBIND 893 -- Tolerate time stamp and other consistency errors. If this flag is 894 -- set to True (-t), then inconsistencies result in warnings rather than 895 -- errors. 896 897 Tree_Output : Boolean := False; 898 -- GNAT 899 -- Set to True (-gnatt) to generate output tree file 900 901 Try_Semantics : Boolean := False; 902 -- GNAT 903 -- Flag set to force attempt at semantic analysis, even if parser errors 904 -- occur. This will probably cause blowups at this stage in the game. On 905 -- the other hand, most such blowups will be caught cleanly and simply 906 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ. 907 908 Undefined_Symbols_Are_False : Boolean := False; 909 -- GNAT, GNATPREP 910 -- Set to True by switch -u of gnatprep or -u in the preprocessing data 911 -- file for the compiler. Indicates that while preprocessing sources, 912 -- symbols that are not defined have the value FALSE. 913 914 Unique_Error_Tag : Boolean := Tag_Errors; 915 -- GNAT 916 -- Indicates if error messages are to be prefixed by the string error: 917 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch. 918 919 Universal_Addressing_On_AAMP : Boolean := False; 920 -- GNAAMP 921 -- Indicates if library-level objects should be accessed and updated 922 -- using universal addressing instructions on the AAMP architecture. 923 -- This flag is set to True when pragma Universal_Data is given as 924 -- a configuration pragma. 925 926 Unreserve_All_Interrupts : Boolean := False; 927 -- GNAT, GNATBIND 928 -- Normally set False, set True if a valid Unreserve_All_Interrupts 929 -- pragma appears anywhere in the main unit for GNAT, or if any ALI 930 -- file has the corresponding attribute set in GNATBIND. 931 932 Upper_Half_Encoding : Boolean := False; 933 -- GNAT 934 -- Normally set False, indicating that upper half ASCII characters are 935 -- used in the normal way to represent themselves. If the wide character 936 -- encoding method uses the upper bit for this encoding, then this flag 937 -- is set True, and upper half characters in the source indicate the 938 -- start of a wide character sequence. 939 940 Usage_Requested : Boolean := False; 941 -- GNAT, GNATBIND, GNATMAKE 942 -- Set to True if -h (-gnath for the compiler) switch encountered 943 -- requesting usage information 944 945 Use_VADS_Size : Boolean := False; 946 -- GNAT 947 -- Set to True if a valid pragma Use_VADS_Size is processed 948 949 Validity_Checks_On : Boolean := True; 950 -- GNAT 951 -- This flag determines if validity checking is on or off. The initial 952 -- state is on, and the required default validity checks are active. The 953 -- actual set of checks that is performed if Validity_Checks_On is set 954 -- is defined by the switches in package Sem_Val. The Validity_Checks_On 955 -- flag is controlled by pragma Validity_Checks (On | Off), and also 956 -- some generated compiler code (typically code that has to do with 957 -- validity check generation) is compiled with this flag set to False. 958 -- This flag is set to False by the -gnatp switch. 959 960 Verbose_Mode : Boolean := False; 961 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATCHOP, GNATNAME, 962 -- GNATCLEAN 963 -- Set to True to get verbose mode (full error message text and location 964 -- information sent to standard output, also header, copyright and summary) 965 966 Warn_On_Constant : Boolean := False; 967 -- GNAT 968 -- Set to True to generate warnings for variables that could be declared 969 -- as constants. Modified by use of -gnatwk/K. 970 971 Warn_On_Dereference : Boolean := False; 972 -- GNAT 973 -- Set to True to generate warnings for implicit dereferences for array 974 -- indexing and record component access. Modified by use of -gnatwd/D. 975 976 Warn_On_Export_Import : Boolean := True; 977 -- GNAT 978 -- Set to True to generate warnings for suspicious use of export or 979 -- import pragmas. Modified by use of -gnatwx/X. 980 981 Warn_On_Hiding : Boolean := False; 982 -- GNAT 983 -- Set to True to generate warnings if a declared entity hides another 984 -- entity. The default is that this warning is suppressed. 985 986 Warn_On_Modified_Unread : Boolean := False; 987 -- GNAT 988 -- Set to True to generate warnings if a variable is assigned but is 989 -- never read. The default is that this warning is suppressed. 990 991 Warn_On_No_Value_Assigned : Boolean := True; 992 -- GNAT 993 -- Set to True to generate warnings if no value is ever assigned to a 994 -- variable that is at least partially uninitialized. Set to false to 995 -- suppress such warnings. The default is that such warnings are enabled. 996 997 Warn_On_Obsolescent_Feature : Boolean := False; 998 -- GNAT 999 -- Set to True to generate warnings on use of any feature in Annex J 1000 -- or if a subprogram is called for which a pragma Obsolescent applies. 1001 1002 Warn_On_Redundant_Constructs : Boolean := False; 1003 -- GNAT 1004 -- Set to True to generate warnings for redundant constructs (e.g. useless 1005 -- assignments/conversions). The default is that this warning is disabled. 1006 1007 Warn_On_Unchecked_Conversion : Boolean := True; 1008 -- GNAT 1009 -- Set to True to generate warnings for unchecked conversions that may have 1010 -- non-portable semantics (e.g. because sizes of types differ). The default 1011 -- is that this warning is enabled. 1012 1013 Warn_On_Unrecognized_Pragma : Boolean := True; 1014 -- GNAT 1015 -- Set to True to generate warnings for unrecognized pragmas. The default 1016 -- is that this warning is enabled. 1017 1018 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error); 1019 Warning_Mode : Warning_Mode_Type := Normal; 1020 -- GNAT, GNATBIND 1021 -- Controls treatment of warning messages. If set to Suppress, warning 1022 -- messages are not generated at all. In Normal mode, they are generated 1023 -- but do not count as errors. In Treat_As_Error mode, warning messages 1024 -- are generated and are treated as errors. 1025 1026 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets; 1027 -- GNAT 1028 -- Method used for encoding wide characters in the source program. See 1029 -- description of type in unit System.WCh_Con for a list of the methods 1030 -- that are currently supported. Note that brackets notation is always 1031 -- recognized in source programs regardless of the setting of this 1032 -- variable. The default setting causes only the brackets notation 1033 -- to be recognized. If this is the main unit, this setting also 1034 -- controls the output of the W=? parameter in the ALI file, which 1035 -- is used to provide the default for Wide_Text_IO files. 1036 1037 Xref_Active : Boolean := True; 1038 -- GNAT 1039 -- Set if cross-referencing is enabled (i.e. xref info in ALI files) 1040 1041 Zero_Cost_Exceptions_Val : Boolean; 1042 Zero_Cost_Exceptions_Set : Boolean := False; 1043 -- GNAT 1044 -- These values are to record the setting of the zero cost exception 1045 -- handling mode set by argument switches (-gnatZ/-gnatL). If the 1046 -- value is set by one of these switches, then Zero_Cost_Exceptions_Set 1047 -- is set to True, and Zero_Cost_Exceptions_Val indicates the setting. 1048 1049 ---------------------------- 1050 -- Configuration Settings -- 1051 ---------------------------- 1052 1053 -- These are settings that are used to establish the mode at the start 1054 -- of each unit. The values defined below can be affected either by 1055 -- command line switches, or by the use of appropriate configuration 1056 -- pragmas in the gnat.adc file. 1057 1058 Ada_83_Config : Boolean; 1059 -- GNAT 1060 -- This is the value of the configuration switch for Ada 83 mode, as set 1061 -- by the command line switch -gnat83, and possibly modified by the use 1062 -- of configuration pragmas Ada_95 and Ada_83 in the gnat.adc file. This 1063 -- switch is used to set the initial value for Ada_83 mode at the start 1064 -- of analysis of a unit. Note however, that the setting of this flag 1065 -- is ignored for internal and predefined units (which are always compiled 1066 -- in Ada 95 mode). 1067 1068 Dynamic_Elaboration_Checks_Config : Boolean := False; 1069 -- GNAT 1070 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 1071 -- switch or by the use of pragma Elaboration_Checking (Dynamic). 1072 1073 Exception_Locations_Suppressed_Config : Boolean := False; 1074 -- GNAT 1075 -- Set True by use of the configuration pragma Suppress_Exception_Messages 1076 1077 Extensions_Allowed_Config : Boolean; 1078 -- GNAT 1079 -- This is the flag that indicates whether extensions are allowed. 1080 -- It can be set True either by use of the -gnatX switch, or by use 1081 -- of the configuration pragma Extensions_Allowed (On). It is always 1082 -- set to True for internal GNAT units, since extensions are always 1083 -- permitted in such units. 1084 1085 External_Name_Exp_Casing_Config : External_Casing_Type; 1086 -- GNAT 1087 -- This is the value of the configuration switch that controls casing 1088 -- of external symbols for which an explicit external name is given. It 1089 -- can be set to Uppercase by the command line switch -gnatF, and further 1090 -- modified by the use of the configuration pragma External_Name_Casing 1091 -- in the gnat.adc file. This flag is used to set the initial value 1092 -- for External_Name_Exp_Casing at the start of analyzing each unit. 1093 -- Note however that the setting of this flag is ignored for internal 1094 -- and predefined units (which are always compiled with As_Is mode). 1095 1096 External_Name_Imp_Casing_Config : External_Casing_Type; 1097 -- GNAT 1098 -- This is the value of the configuration switch that controls casing 1099 -- of external symbols where the external name is implicitly given. It 1100 -- can be set to Uppercase by the command line switch -gnatF, and further 1101 -- modified by the use of the configuration pragma External_Name_Casing 1102 -- in the gnat.adc file. This flag is used to set the initial value 1103 -- for External_Name_Imp_Casing at the start of analyzing each unit. 1104 -- Note however that the setting of this flag is ignored for internal 1105 -- and predefined units (which are always compiled with Lowercase mode). 1106 1107 Polling_Required_Config : Boolean; 1108 -- GNAT 1109 -- This is the value of the configuration switch that controls polling 1110 -- mode. It can be set True by the command line switch -gnatP, and then 1111 -- further modified by the use of pragma Polling in the gnat.adc file. 1112 -- This flag is used to set the initial value for Polling_Required 1113 -- at the start of analyzing each unit. 1114 1115 Use_VADS_Size_Config : Boolean; 1116 -- GNAT 1117 -- This is the value of the configuration switch that controls the use 1118 -- of VADS_Size instead of Size whereever the attribute Size is used. 1119 -- It can be set True by the use of the pragma Use_VADS_Size in the 1120 -- gnat.adc file. This flag is used to set the initial value for 1121 -- Use_VADS_Size at the start of analyzing each unit. Note however that 1122 -- the setting of this flag is ignored for internal and predefined 1123 -- units (which are always compiled with the standard Size semantics). 1124 1125 type Config_Switches_Type is private; 1126 -- Type used to save values of the switches set from Config values 1127 1128 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type); 1129 -- This procedure saves the current values of the switches which are 1130 -- initialized from the above Config values, and then resets these 1131 -- switches according to the Config value settings. 1132 1133 procedure Set_Opt_Config_Switches (Internal_Unit : Boolean); 1134 -- This procedure sets the switches to the appropriate initial values. 1135 -- The parameter Internal_Unit is True for an internal or predefined 1136 -- unit, and affects the way the switches are set (see above). 1137 1138 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type); 1139 -- This procedure restores a set of switch values previously saved 1140 -- by a call to Save_Opt_Switches. 1141 1142 procedure Register_Opt_Config_Switches; 1143 -- This procedure is called after processing the gnat.adc file to record 1144 -- the values of the Config switches, as possibly modified by the use 1145 -- of command line switches and configuration pragmas. 1146 1147 ------------------------ 1148 -- Other Global Flags -- 1149 ------------------------ 1150 1151 Expander_Active : Boolean := False; 1152 -- A flag that indicates if expansion is active (True) or deactivated 1153 -- (False). When expansion is deactivated all calls to expander routines 1154 -- have no effect. Note that the initial setting of False is merely to 1155 -- prevent saving of an undefined value for an initial call to the 1156 -- Expander_Mode_Save_And_Set procedure. For more information on the 1157 -- use of this flag, see package Expander. Indeed this flag might more 1158 -- logically be in the spec of Expander, but it is referenced by Errout, 1159 -- and it really seems wrong for Errout to depend on Expander. 1160 1161 ----------------------- 1162 -- Tree I/O Routines -- 1163 ----------------------- 1164 1165 procedure Tree_Read; 1166 -- Reads switch settings from current tree file using Tree_Read 1167 1168 procedure Tree_Write; 1169 -- Writes out switch settings to current tree file using Tree_Write 1170 1171 -------------------------- 1172 -- ASIS Version Control -- 1173 -------------------------- 1174 1175 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number) 1176 -- are supposed to be used in the GNAT/ASIS version check performed in 1177 -- the ASIS code (this package is also a part of the ASIS implementation). 1178 -- They are set by Tree_Read procedure, so they represent the version 1179 -- number (and the version string) of the compiler which has created the 1180 -- tree, and they are supposed to be compared with the corresponding values 1181 -- from the Gnatvsn package which is a part of ASIS implementation. 1182 1183 Tree_Version_String : String (Gnat_Version_String'Range); 1184 -- Used to store the compiler version string read from a tree file to 1185 -- check if it is the same as stored in the version string in Gnatvsn. 1186 -- Therefore its length is taken directly from the version string in 1187 -- Gnatvsn. If the length of the version string stored in the tree is 1188 -- different, then versions are for sure different, and a string containing 1189 -- '?' characters is assigned to this variable as a result of tree read. 1190 1191 Tree_ASIS_Version_Number : Int; 1192 -- Used to store the ASIS version number read from a tree file to check if 1193 -- it is the same as stored in the ASIS version number in Gnatvsn. 1194 1195private 1196 1197 type Config_Switches_Type is record 1198 Ada_83 : Boolean; 1199 Dynamic_Elaboration_Checks : Boolean; 1200 Exception_Locations_Suppressed : Boolean; 1201 Extensions_Allowed : Boolean; 1202 External_Name_Exp_Casing : External_Casing_Type; 1203 External_Name_Imp_Casing : External_Casing_Type; 1204 Polling_Required : Boolean; 1205 Use_VADS_Size : Boolean; 1206 end record; 1207 1208end Opt; 1209