1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- O P T -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2013, 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. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32-- This package contains global flags set by the initialization routine from 33-- the command line and referenced throughout the compiler, the binder, or 34-- other GNAT tools. The comments indicate which options are used by which 35-- programs (GNAT, GNATBIND, GNATLINK, GNATMAKE, GPRMAKE, etc). 36 37-- Some flags are labelled "PROJECT MANAGER". These are used by tools that 38-- use the Project Manager. These tools include gnatmake, gnatname, the gnat 39-- driver, gnatclean, gprbuild and gprclean. 40 41with Hostparm; use Hostparm; 42with Types; use Types; 43 44pragma Warnings (Off); 45-- This package is used also by gnatcoll 46with System.Strings; use System.Strings; 47with System.WCh_Con; use System.WCh_Con; 48pragma Warnings (On); 49 50package Opt is 51 52 ---------------------- 53 -- Checksum Control -- 54 ---------------------- 55 56 -- Checksums are computed for sources to check for sources being the same 57 -- from a compilation point of view (e.g. spelling of identifiers and 58 -- white space layout do not count in this computation). 59 60 -- The way the checksum is computed has evolved across the various versions 61 -- of GNAT. When gprbuild is called with -m, the checksums must be computed 62 -- the same way in gprbuild as it was in the GNAT version of the compiler. 63 -- The different ways are 64 65 -- Version 6.4 and later: 66 67 -- The Accumulate_Token_Checksum procedure is called after each numeric 68 -- literal and each identifier/keyword. For keywords, Tok_Identifier is 69 -- used in the call to Accumulate_Token_Checksum. 70 71 -- Versions 5.04 to 6.3: 72 73 -- For keywords, the token value were used in the call to procedure 74 -- Accumulate_Token_Checksum. Type Token_Type did not include Tok_Some. 75 76 -- Versions 5.03: 77 78 -- For keywords, the token value were used in the call to 79 -- Accumulate_Token_Checksum. Type Token_Type did not include 80 -- Tok_Interface, Tok_Overriding, Tok_Synchronized and Tok_Some. 81 82 -- Versions 5.02 and before: 83 84 -- No calls to procedure Accumulate_Token_Checksum (the checksum 85 -- mechanism was introduced in version 5.03). 86 87 -- To signal to the scanner whether Accumulate_Token_Checksum needs to be 88 -- called and what versions to call, the following Boolean flags are used: 89 90 Checksum_Accumulate_Token_Checksum : Boolean := True; 91 -- GPRBUILD 92 -- Set to False by gprbuild when the version of GNAT is 5.02 or before. If 93 -- this switch is False, then we do not call Accumulate_Token_Checksum, so 94 -- the setting of the following two flags is irrelevant. 95 96 Checksum_GNAT_6_3 : Boolean := False; 97 -- GPRBUILD 98 -- Set to True by gprbuild when the version of GNAT is 6.3 or before. 99 100 Checksum_GNAT_5_03 : Boolean := False; 101 -- GPRBUILD 102 -- Set to True by gprbuild when the version of GNAT is 5.03 or before. 103 104 ---------------------------------------------- 105 -- Settings of Modes for Current Processing -- 106 ---------------------------------------------- 107 108 -- The following mode values represent the current state of processing. 109 -- The values set here are the default values. Unless otherwise noted, 110 -- the value may be reset in Switch-? with an appropriate switch. In 111 -- some cases, the values can also be modified by pragmas, and in the 112 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify 113 -- the default values. 114 115 type Ada_Version_Type is (Ada_83, Ada_95, Ada_2005, Ada_2012); 116 pragma Ordered (Ada_Version_Type); 117 -- Versions of Ada for Ada_Version below. Note that these are ordered, 118 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful. 119 -- Think twice before using "="; Ada_Version >= Ada_2012 is more likely 120 -- what you want, because it will apply to future versions of the language. 121 122 Ada_Version_Default : constant Ada_Version_Type := Ada_2005; 123 pragma Warnings (Off, Ada_Version_Default); 124 -- GNAT 125 -- Default Ada version if no switch given. The Warnings off is to kill 126 -- constant condition warnings. 127 -- 128 -- WARNING: some scripts rely on the format of this line of code. Any 129 -- change must be coordinated with the scripts requirements. 130 131 Ada_Version : Ada_Version_Type := Ada_Version_Default; 132 -- GNAT 133 -- Current Ada version for compiler, as set by configuration pragmas, 134 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a 135 -- predefined or internal file is compiled. 136 137 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default; 138 -- GNAT 139 -- Like Ada_Version, but does not get set implicitly for predefined 140 -- or internal units, so it reflects the Ada version explicitly set 141 -- using configuration pragmas or compiler switches (or if neither 142 -- appears, it remains set to Ada_Version_Default). This is used in 143 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05/12) 144 -- where in the run-time we want the explicit version set. 145 146 Ada_Version_Runtime : Ada_Version_Type := Ada_2012; 147 -- GNAT 148 -- Ada version used to compile the runtime. Used to set Ada_Version (but 149 -- not Ada_Version_Explicit) when compiling predefined or internal units. 150 151 Ada_Final_Suffix : constant String := "final"; 152 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix); 153 -- GNATBIND 154 -- The name of the procedure that performs the finalization at the end of 155 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 156 157 Ada_Init_Suffix : constant String := "init"; 158 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix); 159 -- GNATBIND 160 -- The name of the procedure that performs initialization at the start 161 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 162 163 Ada_Main_Name_Suffix : constant String := "main"; 164 -- GNATBIND 165 -- The suffix for Ada_Main_Name. Defined as a constant here so that it 166 -- can be referenced in a uniform manner to create either the default 167 -- value of Ada_Main_Name (declared below), or the non-default name 168 -- set by Gnatbind.Scan_Bind_Arg. 169 170 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix); 171 -- GNATBIND 172 -- The name of the Ada package generated by the binder (when in Ada mode). 173 -- This variable may be modified by Gnatbind.Scan_Bind_Arg. 174 175 Address_Clause_Overlay_Warnings : Boolean := True; 176 -- GNAT 177 -- Set False to disable address clause warnings. Modified by use of 178 -- -gnatwo/O. 179 180 Address_Is_Private : Boolean := False; 181 -- GNAT, GNATBIND 182 -- Set True if package System has the line "type Address is private;" 183 184 All_Errors_Mode : Boolean := False; 185 -- GNAT 186 -- Flag set to force display of multiple errors on a single line and 187 -- also repeated error messages for references to undefined identifiers 188 -- and certain other repeated error messages. Set by use of -gnatf. 189 190 All_Sources : Boolean := False; 191 -- GNATBIND 192 -- Set to True to require all source files to be present. This flag is 193 -- directly modified by gnatmake to affect the shared binder routines. 194 195 Alternate_Main_Name : String_Ptr := null; 196 -- GNATBIND 197 -- Set to non null when Bind_Alternate_Main_Name is True. This value 198 -- is modified as needed by Gnatbind.Scan_Bind_Arg. 199 200 ASIS_Mode : Boolean := False; 201 -- GNAT 202 -- Enable semantic checks and tree transformations that are important 203 -- for ASIS but that are usually skipped if Operating_Mode is set to 204 -- Check_Semantics. This flag does not have the corresponding option to set 205 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON 206 -- from the code of GNSA-based tool (a client may need to set ON the 207 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not 208 -- make very much sense, because GNSA cannot do back annotation). 209 210 Assertions_Enabled : Boolean := False; 211 -- GNAT 212 -- Enable assertions made using pragma Assert 213 214 Assume_No_Invalid_Values : Boolean := False; 215 -- GNAT Normally, in accordance with (RM 13.9.1 (9-11)) the front end 216 -- assumes that values could have invalid representations, unless it can 217 -- clearly prove that the values are valid. If this switch is set (by 218 -- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values 219 -- are valid and in range of their representations. This feature is now 220 -- fully enabled in the compiler. 221 222 Back_Annotate_Rep_Info : Boolean := False; 223 -- GNAT 224 -- If set True, enables back annotation of representation information 225 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR 226 -- (list representation information) or -gnatt (generate tree). It is 227 -- also set true if certain Unchecked_Conversion instantiations require 228 -- checking based on annotated values. 229 230 Back_End_Handles_Limited_Types : Boolean; 231 -- This flag is set true if the back end can properly handle limited or 232 -- other by reference types, and avoid copies. If this flag is False, then 233 -- the front end does special expansion for if/case expressions to make 234 -- sure that no copy occurs. If the flag is True, then the expansion for 235 -- if and case expressions relies on the back end properly handling things. 236 -- Currently the default is False for all cases (set in gnat1drv). The 237 -- default can be modified using -gnatd.L (sets the flag True). This is 238 -- used to test the possibility of having the backend handle this. 239 240 Bind_Alternate_Main_Name : Boolean := False; 241 -- GNATBIND 242 -- True if main should be called Alternate_Main_Name.all. 243 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg. 244 245 Bind_Main_Program : Boolean := True; 246 -- GNATBIND 247 -- Set to False if not binding main Ada program 248 249 Bind_For_Library : Boolean := False; 250 -- GNATBIND 251 -- Set to True if the binder needs to generate a file designed for building 252 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg. 253 254 Bind_Only : Boolean := False; 255 -- GNATMAKE, GPRMAKE, GPRBUILD 256 -- Set to True to skip compile and link steps 257 -- (except when Compile_Only and/or Link_Only are True). 258 259 Blank_Deleted_Lines : Boolean := False; 260 -- GNAT, GNATPREP 261 -- Output empty lines for each line of preprocessed input that is deleted 262 -- in the output, including preprocessor lines starting with a '#'. 263 264 Brief_Output : Boolean := False; 265 -- GNAT, GNATBIND 266 -- Force brief error messages to standard error, even if verbose mode is 267 -- set (so that main error messages go to standard output). 268 269 Build_Bind_And_Link_Full_Project : Boolean := False; 270 -- GNATMAKE 271 -- Set to True to build, bind and link all the sources of a project file 272 -- (switch -B) 273 274 Check_Aliasing_Of_Parameters : Boolean := False; 275 -- GNAT 276 -- Set to True to detect whether subprogram parameters and function results 277 -- alias the same object(s). 278 279 Check_Float_Overflow : Boolean := False; 280 -- GNAT 281 -- Set to True to check that operations on predefined unconstrained float 282 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 283 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 284 -- of the -gnateF switch. 285 286 Check_Object_Consistency : Boolean := False; 287 -- GNATBIND, GNATMAKE 288 -- Set to True to check whether every object file is consistent with 289 -- its corresponding ada library information (ALI) file. An object 290 -- file is inconsistent with the corresponding ALI file if the object 291 -- file does not exist or if it has an older time stamp than the ALI file. 292 -- Default above is for GNATBIND. GNATMAKE overrides this default to 293 -- True (see Make.Initialize) since we normally do need to check source 294 -- consistencies in gnatmake. 295 296 Check_Only : Boolean := False; 297 -- GNATBIND 298 -- Set to True to do checks only, no output of binder file 299 300 Check_Policy_List : Node_Id := Empty; 301 -- GNAT 302 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 303 -- that are linked through the Next_Pragma fields, with the list being 304 -- terminated by Empty. The order is most recently processed first. Note 305 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value 306 -- of this variable, implementing the required scope control for pragmas 307 -- appearing a declarative part. 308 309 Check_Readonly_Files : Boolean := False; 310 -- GNATMAKE 311 -- Set to True to check readonly files during the make process 312 313 Check_Source_Files : Boolean := True; 314 -- GNATBIND, GNATMAKE 315 -- Set to True to enable consistency checking for any source files that 316 -- are present (i.e. date must match the date in the library info file). 317 -- Set to False for object file consistency check only. This flag is 318 -- directly modified by gnatmake, to affect the shared binder routines. 319 320 Check_Switches : Boolean := False; 321 -- GNATMAKE, GPRMAKE, GPBUILD 322 -- Set to True to check compiler options during the make process 323 324 Check_Unreferenced : Boolean := False; 325 -- GNAT 326 -- Set to True to enable checking for unreferenced entities other 327 -- than formal parameters (for which see Check_Unreferenced_Formals) 328 -- Modified by use of -gnatwu/U. 329 330 Check_Unreferenced_Formals : Boolean := False; 331 -- GNAT 332 -- Set to True to check for unreferenced formals. This is turned on by 333 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU. 334 335 Check_Validity_Of_Parameters : Boolean := False; 336 -- GNAT 337 -- Set to True to check for proper scalar initialization of subprogram 338 -- parameters on both entry and exit. Turned on by??? turned off by??? 339 340 Check_Withs : Boolean := False; 341 -- GNAT 342 -- Set to True to enable checking for unused withs, and also the case 343 -- of withing a package and using none of the entities in the package. 344 -- Modified by use of -gnatwu/U. 345 346 CodePeer_Mode : Boolean := False; 347 -- GNAT, GNATBIND 348 -- Enable full CodePeer mode (SCIL generation, disable switches that 349 -- interact badly with it, etc...). 350 351 Commands_To_Stdout : Boolean := False; 352 -- GNATMAKE 353 -- True if echoed commands to be written to stdout instead of stderr 354 355 Comment_Deleted_Lines : Boolean := False; 356 -- GNATPREP 357 -- True if source lines removed by the preprocessor should be commented 358 -- in the output file. 359 360 Compile_Only : Boolean := False; 361 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN 362 -- GNATMAKE, GPRMAKE, GPRMAKE: 363 -- set to True to skip bind and link steps (except when Bind_Only is 364 -- True). 365 -- GNATCLEAN, GPRCLEAN: 366 -- set to True to delete only the files produced by the compiler but not 367 -- the library files or the executable files. 368 369 Config_File : Boolean := True; 370 -- GNAT 371 -- Set to False to inhibit reading and processing of gnat.adc file 372 373 Config_File_Names : String_List_Access := null; 374 -- GNAT 375 -- Names of configuration pragmas files (given by switches -gnatec) 376 377 Configurable_Run_Time_Mode : Boolean := False; 378 -- GNAT, GNATBIND 379 -- Set True if the compiler is operating in configurable run-time mode. 380 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target 381 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind 382 -- for details on the handling of the latter pragma. 383 384 Constant_Condition_Warnings : Boolean := False; 385 -- GNAT 386 -- Set to True to activate warnings on constant conditions. Modified by 387 -- use of -gnatwc/C. 388 389 Create_Mapping_File : Boolean := False; 390 -- GNATMAKE, GPRMAKE 391 -- Set to True (-C switch) to indicate that the compiler will be invoked 392 -- with a mapping file (-gnatem compiler switch). 393 394 Debug_Pragmas_Enabled : Boolean := False; 395 -- GNAT 396 -- Enable debug statements from pragma Debug 397 398 Debug_Pragmas_Disabled : Boolean := False; 399 -- GNAT 400 -- Debug pragmas completely disabled (no semantic checking) 401 402 subtype Debug_Level_Value is Nat range 0 .. 3; 403 Debugger_Level : Debug_Level_Value := 0; 404 -- GNATBIND 405 -- The value given to the -g parameter. The default value for -g with 406 -- no value is 2. This is usually ignored by GNATBIND, except in the 407 -- VMS version where it is passed as an argument to __gnat_initialize 408 -- to trigger the activation of the remote debugging interface. 409 -- Is this still true ??? 410 411 Debug_Generated_Code : Boolean := False; 412 -- GNAT 413 -- Set True (-gnatD switch) to debug generated expanded code instead 414 -- of the original source code. Causes debugging information to be 415 -- written with respect to the generated code file that is written. 416 417 Default_Exit_Status : Int := 0; 418 -- GNATBIND 419 -- Set the default exit status value. Set by the -Xnnn switch for the 420 -- binder. 421 422 Default_Stack_Size : Int := -1; 423 -- GNATBIND 424 -- Set to default primary stack size in units of bytes. Set by 425 -- the -dnnn switch for the binder. A value of -1 indicates that no 426 -- default was set by the binder. 427 428 Default_Sec_Stack_Size : Int := -1; 429 -- GNATBIND 430 -- Set to default secondary stack size in units of bytes. Set by 431 -- the -Dnnn switch for the binder. A value of -1 indicates that no 432 -- default was set by the binder, and that the default should be the 433 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size. 434 435 Default_Pool : Node_Id := Empty; 436 -- GNAT 437 -- Used to record the storage pool name (or null literal) that is the 438 -- argument of an applicable pragma Default_Storage_Pool. 439 -- Empty: No pragma Default_Storage_Pool applies. 440 -- N_Null node: "pragma Default_Storage_Pool (null);" applies. 441 -- otherwise: "pragma Default_Storage_Pool (X);" applies, and 442 -- this points to the name X. 443 -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value. 444 445 Detect_Blocking : Boolean := False; 446 -- GNAT 447 -- Set True to force the run time to raise Program_Error if calls to 448 -- potentially blocking operations are detected from protected actions. 449 450 Display_Compilation_Progress : Boolean := False; 451 -- GNATMAKE, GPRMAKE, GPRBUILD 452 -- Set True (-d switch) to display information on progress while compiling 453 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS). 454 455 type Distribution_Stub_Mode_Type is 456 -- GNAT 457 (No_Stubs, 458 -- Normal mode, no generation/compilation of distribution stubs 459 460 Generate_Receiver_Stub_Body, 461 -- The unit being compiled is the RCI body, and the compiler will 462 -- generate the body for the receiver stubs and compile it. 463 464 Generate_Caller_Stub_Body); 465 -- The unit being compiled is the RCI spec, and the compiler will 466 -- generate the body for the caller stubs and compile it. 467 468 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs; 469 -- GNAT 470 -- This enumeration variable indicates the five states of distribution 471 -- annex stub generation/compilation. 472 473 Do_Not_Execute : Boolean := False; 474 -- GNATMAKE 475 -- Set to True if no actual compilations should be undertaken. 476 477 Dump_Source_Text : Boolean := False; 478 -- GNAT 479 -- Set to True (by -gnatL) to dump source text intermingled with generated 480 -- code. Effective only if either of Debug/Print_Generated_Code is true. 481 482 Dynamic_Elaboration_Checks : Boolean := False; 483 -- GNAT 484 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 485 -- switch or by the use of pragma Elaboration_Checks (Dynamic). 486 487 Dynamic_Stack_Measurement : Boolean := False; 488 -- GNATBIND 489 -- Set True to enable dynamic stack measurement (-u flag for gnatbind) 490 491 Dynamic_Stack_Measurement_Array_Size : Nat := 100; 492 -- GNATBIND 493 -- Number of measurements we want to store during dynamic stack analysis. 494 -- When the buffer is full, non-storable results will be output on the fly. 495 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set 496 -- by processing of -u flag for gnatbind. 497 498 Elab_Dependency_Output : Boolean := False; 499 -- GNATBIND 500 -- Set to True to output complete list of elaboration constraints 501 502 Elab_Order_Output : Boolean := False; 503 -- GNATBIND 504 -- Set to True to output chosen elaboration order 505 506 Elab_Warnings : Boolean := False; 507 -- GNAT 508 -- Set to True to generate full elaboration warnings (-gnatwl) 509 510 Error_Msg_Line_Length : Nat := 0; 511 -- GNAT 512 -- Records the error message line length limit. If this is set to zero, 513 -- then we get the old style behavior, in which each call to the error 514 -- message routines generates one line of output as a separate message. 515 -- If it is set to a non-zero value, then continuation lines are folded 516 -- to make a single long message, and then this message is split up into 517 -- multiple lines not exceeding the specified length. Set by -gnatj=nn. 518 519 Exception_Handler_Encountered : Boolean := False; 520 -- GNAT 521 -- This flag is set true if the parser encounters an exception handler. 522 -- It is used to set Warn_On_Exception_Propagation True if the restriction 523 -- No_Exception_Propagation is set. 524 525 Exception_Extra_Info : Boolean := False; 526 -- GNAT 527 -- True when switch -gnateE is used. When True, generate extra information 528 -- associated with exception messages (in particular range and index 529 -- checks). 530 531 Exception_Locations_Suppressed : Boolean := False; 532 -- GNAT 533 -- Set to True if a Suppress_Exception_Locations configuration pragma is 534 -- currently active. 535 536 type Exception_Mechanism_Type is 537 -- Determines the handling of exceptions. See Exp_Ch11 for details 538 -- 539 (Front_End_Setjmp_Longjmp_Exceptions, 540 -- Exceptions use setjmp/longjmp generated explicitly by the front end 541 -- (this includes gigi or other equivalent parts of the code generator). 542 -- AT END handlers are converted into exception handlers by the front 543 -- end in this mode. 544 545 Back_End_Exceptions); 546 -- Exceptions are handled by the back end. The front end simply 547 -- generates the handlers as they appear in the source, and AT END 548 -- handlers are left untouched (they are not converted into exception 549 -- handlers when operating in this mode. 550 pragma Convention (C, Exception_Mechanism_Type); 551 552 Exception_Mechanism : Exception_Mechanism_Type := 553 Front_End_Setjmp_Longjmp_Exceptions; 554 -- GNAT 555 -- Set to the appropriate value depending on the default as given in 556 -- system.ads (ZCX_By_Default). The C convention is there to make this 557 -- variable accessible to gigi. 558 559 Exception_Tracebacks : Boolean := False; 560 -- GNATBIND 561 -- Set to True to store tracebacks in exception occurrences (-E) 562 563 Extensions_Allowed : Boolean := False; 564 -- GNAT 565 -- Set to True by switch -gnatX if GNAT specific language extensions 566 -- are allowed. Currently there are no such defined extensions. 567 568 type External_Casing_Type is ( 569 As_Is, -- External names cased as they appear in the Ada source 570 Uppercase, -- External names forced to all uppercase letters 571 Lowercase); -- External names forced to all lowercase letters 572 573 External_Name_Imp_Casing : External_Casing_Type := Lowercase; 574 -- GNAT 575 -- The setting of this flag determines the casing of external names 576 -- when the name is implicitly derived from an entity name (i.e. either 577 -- no explicit External_Name or Link_Name argument is used, or, in the 578 -- case of extended DEC pragmas, the external name is given using an 579 -- identifier. The As_Is setting is not permitted here (since this would 580 -- create Ada source programs that were case sensitive). 581 582 External_Name_Exp_Casing : External_Casing_Type := As_Is; 583 -- GNAT 584 -- The setting of this flag determines the casing of an external name 585 -- specified explicitly with a string literal. As_Is means the string 586 -- literal is used as given with no modification to the casing. If 587 -- Lowercase or Uppercase is set, then the string is forced to all 588 -- lowercase or all uppercase letters as appropriate. Note that this 589 -- setting has no effect if the external name is given using an identifier 590 -- in the case of extended DEC import/export pragmas (in this case the 591 -- casing is controlled by External_Name_Imp_Casing), and also has no 592 -- effect if an explicit Link_Name is supplied (a link name is always 593 -- used exactly as given). 594 595 External_Unit_Compilation_Allowed : Boolean := False; 596 -- GNATMAKE 597 -- When True (set by gnatmake switch -x), allow compilation of sources 598 -- that are not part of any project file. 599 600 Fast_Math : Boolean := False; 601 -- GNAT 602 -- Indicates the current setting of Fast_Math mode, as set by the use 603 -- of a Fast_Math pragma (set on by Fast_Math (On)). 604 605 Float_Format : Character := ' '; 606 -- GNAT 607 -- A non-blank value indicates that a Float_Format pragma has been 608 -- processed, in which case this variable is set to 'I' for IEEE or 609 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS 610 -- versions of GNAT. 611 612 Float_Format_Long : Character := ' '; 613 -- GNAT 614 -- A non-blank value indicates that a Long_Float pragma has been 615 -- processed (this pragma is recognized only in OpenVMS versions 616 -- of GNAT), in which case this variable is set to D or G for 617 -- D_Float or G_Float. 618 619 Force_ALI_Tree_File : Boolean := False; 620 -- GNAT 621 -- Force generation of ALI file even if errors are encountered. 622 -- Also forces generation of tree file if -gnatt is also set. 623 624 Disable_ALI_File : Boolean := False; 625 -- GNAT 626 -- Disable generation of ALI file 627 628 Force_Checking_Of_Elaboration_Flags : Boolean := False; 629 -- GNATBIND 630 -- True if binding with forced checking of the elaboration flags 631 -- (-F switch set). 632 633 Force_Compilations : Boolean := False; 634 -- GNATMAKE, GPRMAKE, GPRBUILD 635 -- Set to force recompilations even when the objects are up-to-date. 636 637 Full_Path_Name_For_Brief_Errors : Boolean := False; 638 -- PROJECT MANAGER 639 -- When True, in Brief_Output mode, each error message line 640 -- will start with the full path name of the source. 641 -- When False, only the file name without directory information 642 -- is used. 643 644 Full_List : Boolean := False; 645 -- GNAT 646 -- Set True to generate full source listing with embedded errors 647 648 Full_List_File_Name : String_Ptr := null; 649 -- GNAT 650 -- Set to file name to generate full source listing to named file (or if 651 -- the name is of the form .xxx, then to name.xxx where name is the source 652 -- file name with extension stripped. 653 654 Generate_Processed_File : Boolean := False; 655 -- GNAT 656 -- True when switch -gnateG is used. When True, create in a file 657 -- <source>.prep, if the source is preprocessed. 658 659 Generate_SCO : Boolean := False; 660 -- GNAT 661 -- True when switch -fdump-scos (or -gnateS) is used. When True, Source 662 -- Coverage Obligation (SCO) information is generated and output in the ALI 663 -- file. See unit Par_SCO for full details. 664 665 Generate_SCO_Instance_Table : Boolean := False; 666 -- GNAT 667 -- True when switch -fdebug-instances is used. When True, a table of 668 -- instances is included in SCOs. 669 670 Generate_Target_Dependent_Info : Boolean := False; 671 -- GNAT 672 -- When true (-gnatet switch used). True if target dependent info is to be 673 -- generated in the ali file. 674 675 Generating_Code : Boolean := False; 676 -- GNAT 677 -- True if the frontend finished its work and has called the backend to 678 -- process the tree and generate the object file. 679 680 Global_Discard_Names : Boolean := False; 681 -- GNAT, GNATBIND 682 -- True if a pragma Discard_Names appeared as a configuration pragma for 683 -- the current compilation unit. 684 685 GNAT_Mode : Boolean := False; 686 -- GNAT 687 -- True if compiling in GNAT system mode (-gnatg switch) 688 689 Heap_Size : Nat := 0; 690 -- GNATBIND 691 -- Heap size for memory allocations. Valid values are 32 and 64. Only 692 -- available on VMS. 693 694 Identifier_Character_Set : Character; 695 -- GNAT 696 -- This variable indicates the character set to be used for identifiers. 697 -- The possible settings are: 698 -- '1' Latin-5 (ISO-8859-1) 699 -- '2' Latin-5 (ISO-8859-2) 700 -- '3' Latin-5 (ISO-8859-3) 701 -- '4' Latin-5 (ISO-8859-4) 702 -- '5' Latin-5 (ISO-8859-5, Cyrillic) 703 -- '9' Latin-5 (ISO-8859-9) 704 -- 'p' PC (US, IBM page 437) 705 -- '8' PC (European, IBM page 850) 706 -- 'f' Full upper set (all distinct) 707 -- 'n' No upper characters (Ada 83 rules) 708 -- 'w' Latin-1 plus wide characters allowed in identifiers 709 -- 710 -- The setting affects the set of letters allowed in identifiers and the 711 -- upper/lower case equivalences. It does not affect the interpretation of 712 -- character and string literals, which are always stored using the actual 713 -- coding in the source program. This variable is initialized to the 714 -- default value appropriate to the system (in Osint.Initialize), and then 715 -- reset if a command line switch is used to change the setting. 716 717 Ignore_Rep_Clauses : Boolean := False; 718 -- GNAT 719 -- Set True to ignore all representation clauses. Useful when compiling 720 -- code from foreign compilers for checking or ASIS purposes. Can be 721 -- set True by use of -gnatI. 722 723 Ignore_Style_Checks_Pragmas : Boolean := False; 724 -- GNAT 725 -- Set True to ignore all Style_Checks pragmas. Can be set True by use 726 -- of -gnateY. 727 728 Implementation_Unit_Warnings : Boolean := True; 729 -- GNAT 730 -- Set True to active warnings for use of implementation internal units. 731 -- Modified by use of -gnatwi/-gnatwI. 732 733 Implicit_Packing : Boolean := False; 734 -- GNAT 735 -- If set True, then a Size attribute clause on an array is allowed to 736 -- cause implicit packing instead of generating an error message. Set by 737 -- use of pragma Implicit_Packing. 738 739 Ineffective_Inline_Warnings : Boolean := False; 740 -- GNAT 741 -- Set True to activate warnings if front-end inlining (-gnatN) is not 742 -- able to actually inline a particular call (or all calls). Can be 743 -- controlled by use of -gnatwp/-gnatwP. 744 745 Init_Or_Norm_Scalars : Boolean := False; 746 -- GNAT, GANTBIND 747 -- Set True if a pragma Initialize_Scalars applies to the current unit. 748 -- Also set True if a pragma Normalize_Scalars applies. 749 750 Initialize_Scalars : Boolean := False; 751 -- GNAT 752 -- Set True if a pragma Initialize_Scalars applies to the current unit. 753 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 754 755 Initialize_Scalars_Mode1 : Character := 'I'; 756 Initialize_Scalars_Mode2 : Character := 'N'; 757 -- GNATBIND 758 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default 759 -- is IN (invalid values), used if no -S switch is used. 760 761 Inline_Active : Boolean := False; 762 -- GNAT 763 -- Set True to activate pragma Inline processing across modules. Default 764 -- for now is not to inline across module boundaries. 765 766 Inline_Level : Nat := 0; 767 -- GNAT 768 -- Set to indicate the inlining level: 0 means that an appropriate value is 769 -- to be computed by the compiler based on the optimization level (-gnatn), 770 -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full 771 -- inlining across modules (-gnatn2). 772 773 Interface_Library_Unit : Boolean := False; 774 -- GNATBIND 775 -- Set to True to indicate that at least one ALI file is an interface ALI: 776 -- then elaboration flag checks are to be generated in the binder 777 -- generated file. 778 779 Generate_SCIL : Boolean := False; 780 -- GNAT 781 -- Set True to activate SCIL code generation. 782 783 Invalid_Value_Used : Boolean := False; 784 -- GNAT 785 -- Set True if a valid Invalid_Value attribute is encountered 786 787 Follow_Links_For_Files : Boolean := False; 788 -- PROJECT MANAGER 789 -- Set to True (-eL) to process the project files in trusted mode. If 790 -- Follow_Links is False, it is assumed that the project doesn't contain 791 -- any file duplicated through symbolic links (although the latter are 792 -- still valid if they point to a file which is outside of the project), 793 -- and that no directory has a name which is a valid source name. 794 795 Follow_Links_For_Dirs : Boolean := False; 796 -- PROJECT MANAGER 797 -- Set to True if directories can be links in this project, and therefore 798 -- additional system calls must be performed to ensure that we always see 799 -- the same full name for each directory. 800 801 Front_End_Inlining : Boolean := False; 802 -- GNAT 803 -- Set True to activate inlining by front-end expansion 804 805 Inline_Processing_Required : Boolean := False; 806 -- GNAT 807 -- Set True if inline processing is required. Inline processing is required 808 -- if an active Inline pragma is processed. The flag is set for a pragma 809 -- Inline or Inline_Always that is actually active. 810 811 In_Place_Mode : Boolean := False; 812 -- GNATMAKE 813 -- Set True to store ALI and object files in place i.e. in the object 814 -- directory if these files already exist or in the source directory 815 -- if not. 816 817 Keep_Going : Boolean := False; 818 -- GNATMAKE, GPRMAKE, GPRBUILD 819 -- When True signals to ignore compilation errors and keep processing 820 -- sources until there is no more work. 821 822 Keep_Temporary_Files : Boolean := False; 823 -- GNATCMD 824 -- When True the temporary files created by the GNAT driver are not 825 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES. 826 827 Leap_Seconds_Support : Boolean := False; 828 -- GNATBIND 829 -- Set to True to enable leap seconds support in Ada.Calendar and its 830 -- children. 831 832 Link_Only : Boolean := False; 833 -- GNATMAKE, GPRMAKE, GPRBUILD 834 -- Set to True to skip compile and bind steps (except when Bind_Only is 835 -- set to True). 836 837 List_Inherited_Aspects : Boolean := False; 838 -- GNAT 839 -- List inherited invariants, preconditions, and postconditions from 840 -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited 841 -- subtype predicates. Modified by use of -gnatw.l/.L. 842 843 List_Restrictions : Boolean := False; 844 -- GNATBIND 845 -- Set to True to list restrictions pragmas that could apply to partition 846 847 List_Units : Boolean := False; 848 -- GNAT 849 -- List units in the active library for a compilation (-gnatu switch) 850 851 List_Closure : Boolean := False; 852 -- GNATBIND 853 -- List all sources in the closure of a main (-R gnatbind switch) 854 855 List_Dependencies : Boolean := False; 856 -- GNATMAKE 857 -- When True gnatmake verifies that the objects are up to date and 858 -- outputs the list of object dependencies (-M switch). 859 -- Output depends if -a switch is used or not. 860 -- This list can be used directly in a Makefile. 861 862 List_Representation_Info : Int range 0 .. 3 := 0; 863 -- GNAT 864 -- Set non-zero by -gnatR switch to list representation information. 865 -- The settings are as follows: 866 -- 867 -- 0 = no listing of representation information (default as above) 868 -- 1 = list rep info for user defined record and array types 869 -- 2 = list rep info for all user defined types and objects 870 -- 3 = like 2, but variable fields are decoded symbolically 871 872 List_Representation_Info_To_File : Boolean := False; 873 -- GNAT 874 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3 to be 875 -- written to file.rep (where file is the name of the source file) instead 876 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then 877 -- representation info is written to x.adb.ref. 878 879 List_Representation_Info_Mechanisms : Boolean := False; 880 -- GNAT 881 -- Set true by -gnatRm switch. Causes information on mechanisms to be 882 -- included in the representation output information. 883 884 List_Preprocessing_Symbols : Boolean := False; 885 -- GNAT, GNATPREP 886 -- Set to True if symbols for preprocessing a source are to be listed 887 -- before preprocessing occurs. Set to True by switch -s of gnatprep or 888 -- -s in preprocessing data file for the compiler. 889 890 type Create_Repinfo_File_Proc is access procedure (Src : String); 891 type Write_Repinfo_Line_Proc is access procedure (Info : String); 892 type Close_Repinfo_File_Proc is access procedure; 893 -- Types used for procedure addresses below 894 895 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null; 896 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null; 897 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null; 898 -- GNAT 899 -- These three locations are left null when operating in non-compiler (e.g. 900 -- ASIS mode), but when operating in compiler mode, they are set to point 901 -- to the three corresponding procedures in Osint-C. The reason for this 902 -- slightly strange interface is to stop Repinfo from dragging in Osint in 903 -- ASIS mode, which would include lots of unwanted units in the ASIS build. 904 905 type Create_List_File_Proc is access procedure (S : String); 906 type Write_List_Info_Proc is access procedure (S : String); 907 type Close_List_File_Proc is access procedure; 908 -- Types used for procedure addresses below 909 910 Create_List_File_Access : Create_List_File_Proc := null; 911 Write_List_Info_Access : Write_List_Info_Proc := null; 912 Close_List_File_Access : Close_List_File_Proc := null; 913 -- GNAT 914 -- These three locations are left null when operating in non-compiler 915 -- (e.g. from the binder), but when operating in compiler mode, they are 916 -- set to point to the three corresponding procedures in Osint-C. The 917 -- reason for this slightly strange interface is to prevent Repinfo 918 -- from dragging in Osint-C in the binder, which would include unwanted 919 -- units in the binder. 920 921 Locking_Policy : Character := ' '; 922 -- GNAT, GNATBIND 923 -- Set to ' ' for the default case (no locking policy specified). Reset to 924 -- first character (uppercase) of locking policy name if a valid pragma 925 -- Locking_Policy is encountered. 926 927 Locking_Policy_Sloc : Source_Ptr := No_Location; 928 -- GNAT, GNATBIND 929 -- Remember location of previous Locking_Policy pragma. This is used for 930 -- inconsistency error messages. A value of System_Location is used if the 931 -- policy is set in package System. 932 933 Look_In_Primary_Dir : Boolean := True; 934 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN 935 -- Set to False if a -I- was present on the command line. When True we are 936 -- allowed to look in the primary directory to locate other source or 937 -- library files. 938 939 Make_Steps : Boolean := False; 940 -- GNATMAKE 941 -- Set to True when either Compile_Only, Bind_Only or Link_Only is 942 -- set to True. 943 944 Main_Index : Int := 0; 945 -- GNATMAKE 946 -- This is set to non-zero by gnatmake switch -eInnn to indicate that 947 -- the main program is the nnn unit in a multi-unit source file. 948 949 Mapping_File_Name : String_Ptr := null; 950 -- GNAT 951 -- File name of mapping between unit names, file names and path names. 952 -- (given by switch -gnatem) 953 954 Maximum_Messages : Int := 9999; 955 -- GNAT, GNATBIND 956 -- Maximum default number of errors before compilation is terminated, or in 957 -- the case of GNAT, maximum number of warnings before further warnings are 958 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch. 959 960 Maximum_File_Name_Length : Int; 961 -- GNAT, GNATBIND 962 -- Maximum number of characters allowed in a file name, not counting the 963 -- extension, as set by the appropriate switch. If no switch is given, 964 -- then this value is initialized by Osint to the appropriate value. 965 966 Maximum_Instantiations : Int := 8000; 967 -- GNAT 968 -- Maximum number of instantiations permitted (to stop runaway cases 969 -- of nested instantiations). These situations probably only occur in 970 -- specially concocted test cases. Can be modified by -gnateinn switch. 971 972 Maximum_Processes : Positive := 1; 973 -- GNATMAKE, GPRMAKE, GPRBUILD 974 -- Maximum number of processes that should be spawned to carry out 975 -- compilations. 976 977 Minimal_Recompilation : Boolean := False; 978 -- GNATMAKE 979 -- Set to True if minimal recompilation mode requested 980 981 Multiple_Unit_Index : Int; 982 -- GNAT 983 -- This is set non-zero if the current unit is being compiled in multiple 984 -- unit per file mode, meaning that the current unit is selected from the 985 -- sequence of units in the current source file, using the value stored 986 -- in this variable (e.g. 2 = select second unit in file). A value of 987 -- zero indicates that we are in normal (one unit per file) mode. 988 989 No_Deletion : Boolean := False; 990 -- GNATPREP 991 -- Set by preprocessor switch -a. Do not eliminate any source text. Implies 992 -- Undefined_Symbols_Are_False. Useful to perform a syntax check on all 993 -- branches of #if constructs. 994 995 No_Main_Subprogram : Boolean := False; 996 -- GNATMAKE, GNATBIND 997 -- Set to True if compilation/binding of a program without main 998 -- subprogram requested. 999 1000 No_Run_Time_Mode : Boolean := False; 1001 -- GNAT, GNATBIND 1002 -- This flag is set True if a No_Run_Time pragma is encountered. See 1003 -- spec of Rtsfind for a full description of handling of this pragma. 1004 1005 No_Split_Units : Boolean := False; 1006 -- GPRBUILD 1007 -- Set to True with switch --no-split-units. When True, unit sources, spec, 1008 -- body and subunits, must all be in the same project.This is checked after 1009 -- each compilation. 1010 1011 No_Stdinc : Boolean := False; 1012 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF 1013 -- Set to True if no default source search dirs added to search list 1014 1015 No_Stdlib : Boolean := False; 1016 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF 1017 -- Set to True if no default library search dirs added to search list 1018 1019 No_Strict_Aliasing : Boolean := False; 1020 -- GNAT 1021 -- Set True if pragma No_Strict_Aliasing with no parameters encountered 1022 1023 Normalize_Scalars : Boolean := False; 1024 -- GNAT, GNATBIND 1025 -- Set True if a pragma Normalize_Scalars applies to the current unit. 1026 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 1027 1028 Object_Directory_Present : Boolean := False; 1029 -- GNATMAKE 1030 -- Set to True when an object directory is specified with option -D 1031 1032 Object_Path_File_Name : String_Ptr := null; 1033 -- GNAT2WHY 1034 -- Path of the temporary file that contains a list of object directories 1035 -- passed by -gnateO=<obj_path_file>. 1036 1037 One_Compilation_Per_Obj_Dir : Boolean := False; 1038 -- GNATMAKE, GPRBUILD 1039 -- Set to True with switch --single-compile-per-obj-dir. When True, there 1040 -- cannot be simultaneous compilations with the object files in the same 1041 -- object directory, if project files are used. 1042 1043 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code); 1044 Operating_Mode : Operating_Mode_Type := Generate_Code; 1045 -- GNAT 1046 -- Indicates the operating mode of the compiler. The default is generate 1047 -- code, which runs the parser, semantics and backend. Switches can be 1048 -- used to set syntax checking only mode, or syntax and semantics checking 1049 -- only mode. Operating_Mode can also be modified as a result of detecting 1050 -- errors during the compilation process. In particular if any serious 1051 -- error is detected then this flag is reset from Generate_Code to 1052 -- Check_Semantics after generating an error message. 1053 1054 Optimize_Alignment : Character := 'O'; 1055 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can 1056 -- be modified by use of pragma Optimize_Alignment. 1057 1058 Optimize_Alignment_Local : Boolean := False; 1059 -- Set True if Optimize_Alignment mode is set by a local configuration 1060 -- pragma that overrides the gnat.adc (or other configuration file) default 1061 -- so that the unit is not dependent on the default setting. Also always 1062 -- set True for internal units, since these always have a default setting 1063 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to 1064 -- them all having such an explicit pragma in each unit). 1065 1066 Original_Operating_Mode : Operating_Mode_Type := Generate_Code; 1067 -- GNAT 1068 -- Indicates the original operating mode of the compiler as set by compiler 1069 -- options. This is identical to Operating_Mode except that this is not 1070 -- affected by errors. 1071 1072 Optimization_Level : Int; 1073 pragma Import (C, Optimization_Level, "optimize"); 1074 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3) 1075 -- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and 1076 -- GNAAMP back ends. 1077 1078 Optimize_Size : Int; 1079 pragma Import (C, Optimize_Size, "optimize_size"); 1080 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero 1081 -- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c 1082 -- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends 1083 1084 Output_File_Name_Present : Boolean := False; 1085 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE 1086 -- Set to True when the output C file name is given with option -o for 1087 -- GNATBIND, when the object file name is given with option -gnatO for GNAT 1088 -- or when the executable is given with option -o for GNATMAKE or GPRMAKE. 1089 1090 Output_Linker_Option_List : Boolean := False; 1091 -- GNATBIND 1092 -- True if output of list of linker options is requested (-K switch set) 1093 1094 Output_ALI_List : Boolean := False; 1095 ALI_List_Filename : String_Ptr; 1096 -- GNATBIND 1097 -- True if output of list of ALIs is requested (-A switch set). List is 1098 -- output under the given filename, or standard output if not specified. 1099 1100 Output_Object_List : Boolean := False; 1101 Object_List_Filename : String_Ptr; 1102 -- GNATBIND 1103 -- True if output of list of objects is requested (-O switch set). List is 1104 -- output under the given filename, or standard output if not specified. 1105 1106 Partition_Elaboration_Policy : Character := ' '; 1107 -- GNAT, GNATBIND 1108 -- Set to ' ' for the default case (no elaboration policy specified). Reset 1109 -- to first character (uppercase) of locking policy name if a valid pragma 1110 -- Partition_Elaboration_Policy is encountered. 1111 1112 Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location; 1113 -- GNAT, GNATBIND 1114 -- Remember location of previous Partition_Elaboration_Policy pragma. This 1115 -- is used for inconsistency error messages. A value of System_Location is 1116 -- used if the policy is set in package System. 1117 1118 Persistent_BSS_Mode : Boolean := False; 1119 -- GNAT 1120 -- True if a Persistent_BSS configuration pragma is in effect, causing 1121 -- potentially persistent data to be placed in the persistent_bss section. 1122 1123 Pessimistic_Elab_Order : Boolean := False; 1124 -- GNATBIND 1125 -- True if pessimistic elaboration order is to be chosen (-p switch set) 1126 1127 Polling_Required : Boolean := False; 1128 -- GNAT 1129 -- Set to True if polling for asynchronous abort is enabled by using 1130 -- the -gnatP option for GNAT. 1131 1132 Preprocessing_Data_File : String_Ptr := null; 1133 -- GNAT 1134 -- Set by switch -gnatep=. The file name of the preprocessing data file. 1135 1136 Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4); 1137 -- An extensible array to temporarily stores symbol definitions specified 1138 -- on the command line with -gnateD switches. 1139 -- What is this magic constant 4 ??? 1140 -- What is extensible about this fixed length array ??? 1141 1142 Preprocessing_Symbol_Last : Natural := 0; 1143 -- Index of last symbol definition in array Symbol_Definitions 1144 1145 Print_Generated_Code : Boolean := False; 1146 -- GNAT 1147 -- Set to True to enable output of generated code in source form. This 1148 -- flag is set by the -gnatG switch. 1149 1150 Print_Standard : Boolean := False; 1151 -- GNAT 1152 -- Set to true to enable printing of package standard in source form. 1153 -- This flag is set by the -gnatS switch 1154 1155 Propagate_Exceptions : Boolean := False; 1156 -- GNAT 1157 -- Indicates if subprogram descriptor exception tables should be 1158 -- built for imported subprograms. Set True if a Propagate_Exceptions 1159 -- pragma applies to the extended main unit. 1160 1161 type Usage is (Unknown, Not_In_Use, In_Use); 1162 Project_File_In_Use : Usage := Unknown; 1163 -- GNAT 1164 -- Indicates if a project file is used or not. Set to In_Use by the first 1165 -- SFNP pragma. 1166 1167 Queuing_Policy : Character := ' '; 1168 -- GNAT, GNATBIND 1169 -- Set to ' ' for the default case (no queuing policy specified). Reset to 1170 -- first character (uppercase) of locking policy name if a valid 1171 -- Queuing_Policy pragma is encountered. 1172 1173 Queuing_Policy_Sloc : Source_Ptr := No_Location; 1174 -- GNAT, GNATBIND 1175 -- Remember location of previous Queuing_Policy pragma. This is used for 1176 -- inconsistency error messages. A value of System_Location is used if the 1177 -- policy is set in package System. 1178 1179 Quiet_Output : Boolean := False; 1180 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN 1181 -- Set to True if the tool should not have any output if there are no 1182 -- errors or warnings. 1183 1184 Overriding_Renamings : Boolean := False; 1185 -- GNAT 1186 -- Set to True to enable compatibility mode with Rational compiler, and 1187 -- to accept renamings of implicit operations in their own scope. 1188 1189 Replace_In_Comments : Boolean := False; 1190 -- GNATPREP 1191 -- Set to True if -C switch used 1192 1193 RTS_Lib_Path_Name : String_Ptr := null; 1194 RTS_Src_Path_Name : String_Ptr := null; 1195 -- GNAT 1196 -- Set to the "adalib" and "adainclude" directories of the run time 1197 -- specified by --RTS=. 1198 1199 RTS_Switch : Boolean := False; 1200 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF 1201 -- Set to True when the --RTS switch is set 1202 1203 Run_Path_Option : Boolean := True; 1204 -- GNATMAKE, GNATLINK 1205 -- Set to False when no run_path_option should be issued to the linker 1206 1207 Search_Directory_Present : Boolean := False; 1208 -- GNAT 1209 -- Set to True when argument is -I. Reset to False when next argument, a 1210 -- search directory path is taken into account. Note that this is quite 1211 -- different from other switches in this section in that it is only set in 1212 -- a transitory manner as a result of scanning a -I switch with no file 1213 -- name, and if set, is an indication that the next argument is to be 1214 -- treated as a file name. 1215 1216 Sec_Stack_Used : Boolean := False; 1217 -- GNAT, GBATBIND 1218 -- Set True if generated code uses the System.Secondary_Stack package. For 1219 -- the binder, set if any unit uses the secondary stack package. 1220 1221 Setup_Projects : Boolean := False; 1222 -- GNAT DRIVER 1223 -- Set to True for GNAT SETUP: the Project Manager creates non existing 1224 -- object, library and exec directories. 1225 1226 Shared_Libgnat : Boolean; 1227 -- GNATBIND 1228 -- Set to True if a shared libgnat is requested by using the -shared option 1229 -- for GNATBIND and to False when using the -static option. The value of 1230 -- this flag is set by Gnatbind.Scan_Bind_Arg. 1231 1232 Short_Circuit_And_Or : Boolean := False; 1233 -- GNAT 1234 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit. 1235 1236 Short_Descriptors : Boolean := False; 1237 -- GNAT 1238 -- Set True if a pragma Short_Descriptors applies to the current unit. 1239 1240 Special_Exception_Package_Used : Boolean := False; 1241 -- GNAT 1242 -- Set to True if either of the unit GNAT.Most_Recent_Exception or 1243 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of 1244 -- local raise statements into gotos in the presence of either package. 1245 1246 Sprint_Line_Limit : Nat := 72; 1247 -- GNAT 1248 -- Limit values for chopping long lines in Sprint output, can be reset 1249 -- by use of NNN parameter with -gnatG or -gnatD switches. 1250 1251 Stack_Checking_Enabled : Boolean; 1252 -- GNAT 1253 -- Set to indicate if -fstack-check switch is set for the compilation. True 1254 -- means that the switch is set, so that stack checking is enabled. False 1255 -- means that the switch is not set (no stack checking). This value is 1256 -- obtained from the external imported value flag_stack_check in the gcc 1257 -- backend (see Frontend) and may be referenced throughout the compilation 1258 -- phases. 1259 1260 Style_Check : Boolean := False; 1261 -- GNAT 1262 -- Set True to perform style checks. Activates checks carried out in 1263 -- package Style (see body of this package for details of checks). This 1264 -- flag is set True by either the -gnatg or -gnaty switches. 1265 1266 Suppress_All_Inlining : Boolean := False; 1267 -- GNAT 1268 -- Set by -fno-inline. Suppresses all inlining, both front end and back end 1269 -- regardless of any other switches that are set. 1270 1271 Suppress_Control_Flow_Optimizations : Boolean := False; 1272 -- GNAT 1273 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations 1274 -- that interfere with coverage analysis based on the object code. 1275 1276 System_Extend_Pragma_Arg : Node_Id := Empty; 1277 -- GNAT 1278 -- Set non-empty if and only if a correct Extend_System pragma was present 1279 -- in which case it points to the argument of the pragma, and the name can 1280 -- be located as Chars (Expression (System_Extend_Pragma_Arg)). 1281 1282 System_Extend_Unit : Node_Id := Empty; 1283 -- GNAT 1284 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System 1285 -- is never appropriate in GNAT_Mode (and causes troubles, including 1286 -- bogus circularities, if we try to compile the run-time library with 1287 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit 1288 -- is a copy of the value set in System_Extend_Pragma_Arg. 1289 1290 Subunits_Missing : Boolean := False; 1291 -- GNAT 1292 -- This flag is set true if missing subunits are detected with code 1293 -- generation active. This causes code generation to be skipped. 1294 1295 Suppress_Checks : Boolean := False; 1296 -- GNAT 1297 -- Set to True if -gnatp (suppress all checks) switch present. 1298 1299 Suppress_Options : Suppress_Record; 1300 -- GNAT 1301 -- Indicates outer level setting of check suppression. This initializes 1302 -- the settings of the outer scope level in any unit compiled. This is 1303 -- initialized by Osint.Initialize, and further initialized by the 1304 -- Adjust_Global_Switches flag in Gnat1drv. 1305 1306 Suppress_Back_Annotation : Boolean := False; 1307 -- GNAT 1308 -- This flag is set True if back annotation of representation information 1309 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set. 1310 -- This avoids unnecessary time being spent on back annotation. 1311 1312 Table_Factor : Int := 1; 1313 -- GNAT 1314 -- Factor by which all initial table sizes set in Alloc are multiplied. 1315 -- Used in Table to calculate initial table sizes (the initial table size 1316 -- is the value in Alloc, used as the Table_Initial parameter value, 1317 -- multiplied by the factor given here. The default value is used if no 1318 -- -gnatT switch appears. 1319 1320 Tagged_Type_Expansion : Boolean := True; 1321 -- GNAT 1322 -- Set True if tagged types and interfaces should be expanded by the 1323 -- front-end. If False, the original tree is left unexpanded for tagged 1324 -- types and dispatching calls, assuming the underlying target supports 1325 -- it (e.g. in the JVM case). 1326 1327 Task_Dispatching_Policy : Character := ' '; 1328 -- GNAT, GNATBIND 1329 -- Set to ' ' for the default case (no task dispatching policy specified). 1330 -- Reset to first character (uppercase) of task dispatching policy name 1331 -- if a valid Task_Dispatching_Policy pragma is encountered. 1332 1333 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location; 1334 -- GNAT, GNATBIND 1335 -- Remember location of previous Task_Dispatching_Policy pragma. This is 1336 -- used for inconsistency error messages. A value of System_Location is 1337 -- used if the policy is set in package System. 1338 1339 Tasking_Used : Boolean := False; 1340 -- Set True if any tasking construct is encountered. Used to activate the 1341 -- output of the Q, L and T lines in ALI files. 1342 1343 Time_Slice_Set : Boolean := False; 1344 -- GNATBIND 1345 -- Set True if a pragma Time_Slice is processed in the main unit, or 1346 -- if the -gnatTnn switch is present to set a time slice value. 1347 1348 Time_Slice_Value : Nat; 1349 -- GNATBIND 1350 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if 1351 -- Time_Slice pragma has been processed. Set to the time slice value in 1352 -- microseconds. Negative values are stored as zero, and the value is not 1353 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are 1354 -- reset to this maximum. This can also be set with the -gnatTnn switch. 1355 1356 Tolerate_Consistency_Errors : Boolean := False; 1357 -- GNATBIND 1358 -- Tolerate time stamp and other consistency errors. If this flag is set to 1359 -- True (-t), then inconsistencies result in warnings rather than errors. 1360 1361 Treat_Categorization_Errors_As_Warnings : Boolean := False; 1362 -- Normally categorization errors are true illegalities. If this switch 1363 -- is set, then such errors result in warning messages rather than error 1364 -- messages. Set True by -gnateP (P for Pure/Preelaborate). 1365 1366 Treat_Restrictions_As_Warnings : Boolean := False; 1367 -- GNAT 1368 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by 1369 -- -gnatr switch. 1370 1371 Tree_Output : Boolean := False; 1372 -- GNAT 1373 -- Set to True (-gnatt) to generate output tree file 1374 1375 True_VMS_Target : Boolean := False; 1376 -- Set True if we are on a VMS target. The setting of this flag reflects 1377 -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which 1378 -- can also be true when debug flag m is set (-gnatdm). This is used in the 1379 -- few cases where we do NOT want -gnatdm to trigger the VMS behavior. 1380 1381 Try_Semantics : Boolean := False; 1382 -- GNAT 1383 -- Flag set to force attempt at semantic analysis, even if parser errors 1384 -- occur. This will probably cause blowups at this stage in the game. On 1385 -- the other hand, most such blowups will be caught cleanly and simply 1386 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ. 1387 1388 Unchecked_Shared_Lib_Imports : Boolean := False; 1389 -- GPRBUILD 1390 -- Set to True when shared library projects are allowed to import projects 1391 -- that are not shared library projects. Set by switch 1392 -- --unchecked-shared-lib-imports. 1393 1394 Undefined_Symbols_Are_False : Boolean := False; 1395 -- GNAT, GNATPREP 1396 -- Set to True by switch -u of gnatprep or -u in the preprocessing data 1397 -- file for the compiler. Indicates that while preprocessing sources, 1398 -- symbols that are not defined have the value FALSE. 1399 1400 Unique_Error_Tag : Boolean := Tag_Errors; 1401 -- GNAT 1402 -- Indicates if error messages are to be prefixed by the string error: 1403 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch. 1404 1405 Universal_Addressing_On_AAMP : Boolean := False; 1406 -- GNAAMP 1407 -- Indicates if library-level objects should be accessed and updated using 1408 -- universal addressing instructions on the AAMP architecture. This flag is 1409 -- set to True when pragma Universal_Data is given as a configuration 1410 -- pragma. 1411 1412 Unreserve_All_Interrupts : Boolean := False; 1413 -- GNAT, GNATBIND 1414 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma 1415 -- appears anywhere in the main unit for GNAT, or if any ALI file has the 1416 -- corresponding attribute set in GNATBIND. 1417 1418 Upper_Half_Encoding : Boolean := False; 1419 -- GNAT, GNATBIND 1420 -- Normally set False, indicating that upper half ISO 8859-1 characters are 1421 -- used in the normal way to represent themselves. If the wide character 1422 -- encoding method uses the upper bit for this encoding, then this flag is 1423 -- set True, and upper half characters in the source indicate the start of 1424 -- a wide character sequence. Set by -gnatW or -W switches. 1425 1426 Use_Include_Path_File : Boolean := False; 1427 -- GNATMAKE, GPRBUILD 1428 -- When True, create a source search path file, even when a mapping file 1429 -- is used. 1430 1431 Usage_Requested : Boolean := False; 1432 -- GNAT, GNATBIND, GNATMAKE 1433 -- Set to True if -h (-gnath for the compiler) switch encountered 1434 -- requesting usage information 1435 1436 Use_Expression_With_Actions : Boolean; 1437 -- The N_Expression_With_Actions node has been introduced relatively 1438 -- recently, and not all back ends are prepared to handle it yet. So 1439 -- we use this flag to suppress its use during a transitional period. 1440 -- Currently the default is False for all cases (set in gnat1drv). 1441 -- The default can be modified using -gnatd.X/-gnatd.Y. 1442 1443 Use_Pragma_Linker_Constructor : Boolean := False; 1444 -- GNATBIND 1445 -- True if pragma Linker_Constructor applies to adainit 1446 1447 Use_VADS_Size : Boolean := False; 1448 -- GNAT 1449 -- Set to True if a valid pragma Use_VADS_Size is processed 1450 1451 Validity_Checks_On : Boolean := True; 1452 -- GNAT 1453 -- This flag determines if validity checking is on or off. The initial 1454 -- state is on, and the required default validity checks are active. The 1455 -- actual set of checks that is performed if Validity_Checks_On is set is 1456 -- defined by the switches in package Validsw. The Validity_Checks_On flag 1457 -- is controlled by pragma Validity_Checks (On | Off), and also some 1458 -- generated compiler code (typically code that has to do with validity 1459 -- check generation) is compiled with this flag set to False. This flag is 1460 -- set to False by the -gnatp switch. 1461 1462 Verbose_Mode : Boolean := False; 1463 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN, 1464 -- GPRMAKE, GPRBUILD, GPRCLEAN 1465 -- Set to True to get verbose mode (full error message text and location 1466 -- information sent to standard output, also header, copyright and summary) 1467 1468 type Verbosity_Level_Type is (None, Low, Medium, High); 1469 pragma Ordered (Verbosity_Level_Type); 1470 Verbosity_Level : Verbosity_Level_Type := High; 1471 -- GNATMAKE, GPRMAKE 1472 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates 1473 -- the level of verbosity of informational messages: 1474 -- 1475 -- In Low Verbosity, the reasons why a source is recompiled, the name 1476 -- of the executable and the reason it must be rebuilt is output. 1477 -- 1478 -- In Medium Verbosity, additional lines are output for each ALI file 1479 -- that is checked. 1480 -- 1481 -- In High Verbosity, additional lines are output when the ALI file 1482 -- is part of an Ada library, is read-only or is part of the runtime. 1483 1484 Warn_On_Ada_2005_Compatibility : Boolean := True; 1485 -- GNAT 1486 -- Set to True to generate all warnings on Ada 2005 compatibility issues, 1487 -- including warnings on Ada 2005 obsolescent features used in Ada 2005 1488 -- mode. Set by default, modified by use of -gnatwy/Y. 1489 1490 Warn_On_Ada_2012_Compatibility : Boolean := True; 1491 -- GNAT 1492 -- Set to True to generate all warnings on Ada 2012 compatibility issues, 1493 -- including warnings on Ada 2012 obsolescent features used in Ada 2012 1494 -- mode. Modified by use of -gnatwy/Y. 1495 1496 Warn_On_All_Unread_Out_Parameters : Boolean := False; 1497 -- GNAT 1498 -- Set to True to generate warnings in all cases where a variable is 1499 -- modified by being passed as to an OUT formal, but the resulting value is 1500 -- never read. The default is that this warning is suppressed. Modified 1501 -- by use of gnatw.o/.O. 1502 1503 Warn_On_Assertion_Failure : Boolean := True; 1504 -- GNAT 1505 -- Set to True to activate warnings on assertions that can be determined 1506 -- at compile time will always fail. Modified by use of -gnatw.a/.A. 1507 1508 Warn_On_Assumed_Low_Bound : Boolean := True; 1509 -- GNAT 1510 -- Set to True to activate warnings for string parameters that are indexed 1511 -- with literals or S'Length, presumably assuming a lower bound of one. 1512 -- Modified by use of -gnatww/W. 1513 1514 Warn_On_Atomic_Synchronization : Boolean := False; 1515 -- GNAT 1516 -- Set to True to generate information messages for atomic synchronization. 1517 -- Modified by use of -gnatw.n/.N. 1518 1519 Warn_On_Bad_Fixed_Value : Boolean := False; 1520 -- GNAT 1521 -- Set to True to generate warnings for static fixed-point expression 1522 -- values that are not an exact multiple of the small value of the type. 1523 -- Odd by default, modified by use of -gnatwb/B. 1524 1525 Warn_On_Biased_Representation : Boolean := True; 1526 -- GNAT 1527 -- Set to True to generate warnings for size clauses, component clauses 1528 -- and component_size clauses that force biased representation. Modified 1529 -- by use of -gnatw.b/.B. 1530 1531 Warn_On_Constant : Boolean := False; 1532 -- GNAT 1533 -- Set to True to generate warnings for variables that could be declared 1534 -- as constants. Modified by use of -gnatwk/K. 1535 1536 Warn_On_Deleted_Code : Boolean := False; 1537 -- GNAT 1538 -- Set to True to generate warnings for code deleted by the front end 1539 -- for conditional statements whose outcome is known at compile time. 1540 -- Modified by use of -gnatwt/T. 1541 1542 Warn_On_Dereference : Boolean := False; 1543 -- GNAT 1544 -- Set to True to generate warnings for implicit dereferences for array 1545 -- indexing and record component access. Modified by use of -gnatwd/D. 1546 1547 Warn_On_Export_Import : Boolean := True; 1548 -- GNAT 1549 -- Set to True to generate warnings for suspicious use of export or 1550 -- import pragmas. Modified by use of -gnatwx/X. 1551 1552 Warn_On_Hiding : Boolean := False; 1553 -- GNAT 1554 -- Set to True to generate warnings if a declared entity hides another 1555 -- entity. The default is that this warning is suppressed. Modified by 1556 -- use of -gnatwh/H. 1557 1558 Warn_On_Modified_Unread : Boolean := False; 1559 -- GNAT 1560 -- Set to True to generate warnings if a variable is assigned but is never 1561 -- read. Also controls warnings for similar cases involving out parameters, 1562 -- but only if there is only one out parameter for the procedure involved. 1563 -- The default is that this warning is suppressed, modified by use of 1564 -- -gnatwm/M. 1565 1566 Warn_On_No_Value_Assigned : Boolean := True; 1567 -- GNAT 1568 -- Set to True to generate warnings if no value is ever assigned to a 1569 -- variable that is at least partially uninitialized. Set to false to 1570 -- suppress such warnings. The default is that such warnings are enabled. 1571 -- Modified by use of -gnatwv/V. 1572 1573 Warn_On_Non_Local_Exception : Boolean := False; 1574 -- GNAT 1575 -- Set to True to generate warnings for non-local exception raises and also 1576 -- handlers that can never handle a local raise. This warning is only ever 1577 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The 1578 -- default is not to generate the warnings except that if the source has 1579 -- at least one exception handler, and this restriction is set, and the 1580 -- warning was not explicitly turned off, then it is turned on by default. 1581 -- Modified by use of -gnatw.x/.X. 1582 1583 No_Warn_On_Non_Local_Exception : Boolean := False; 1584 -- GNAT 1585 -- This is set to True if the above warning is explicitly suppressed. We 1586 -- use this to avoid turning it on by default when No_Exception_Propagation 1587 -- restriction is set and an exception handler is present. 1588 1589 Warn_On_Object_Renames_Function : Boolean := False; 1590 -- GNAT 1591 -- Set to True to generate warnings when a function result is renamed as 1592 -- an object. The default is that this warning is disabled. Modified by 1593 -- use of -gnatw.r/.R. 1594 1595 Warn_On_Obsolescent_Feature : Boolean := False; 1596 -- GNAT 1597 -- Set to True to generate warnings on use of any feature in Annex or if a 1598 -- subprogram is called for which a pragma Obsolescent applies. Modified 1599 -- by use of -gnatwj/J. 1600 1601 Warn_On_Overlap : Boolean := False; 1602 -- GNAT 1603 -- Set to True to generate warnings when a writable actual overlaps with 1604 -- another actual in a subprogram call. This applies only in modes before 1605 -- Ada 2012. Starting with Ada 2012, such overlaps are illegal. 1606 -- Modified by use of -gnatw.i/.I. 1607 1608 Warn_On_Questionable_Missing_Parens : Boolean := True; 1609 -- GNAT 1610 -- Set to True to generate warnings for cases where parentheses are missing 1611 -- and the usage is questionable, because the intent is unclear. On by 1612 -- default, modified by use of -gnatwq/Q. 1613 1614 Warn_On_Parameter_Order : Boolean := False; 1615 -- GNAT 1616 -- Set to True to generate warnings for cases where the argument list for 1617 -- a call is a sequence of identifiers that match the formal identifiers, 1618 -- but are in the wrong order. 1619 1620 Warn_On_Redundant_Constructs : Boolean := False; 1621 -- GNAT 1622 -- Set to True to generate warnings for redundant constructs (e.g. useless 1623 -- assignments/conversions). The default is that this warning is disabled. 1624 -- Modified by use of -gnatwr/R. 1625 1626 Warn_On_Reverse_Bit_Order : Boolean := True; 1627 -- GNAT 1628 -- Set to True to generate warning (informational) messages for component 1629 -- clauses that are affected by non-standard bit-order. The default is 1630 -- that this warning is enabled. Modified by -gnatw.v/.V. 1631 1632 Warn_On_Suspicious_Contract : Boolean := True; 1633 -- GNAT 1634 -- Set to True to generate warnings for suspicious contracts expressed as 1635 -- pragmas or aspects precondition and postcondition. The default is that 1636 -- this warning is enabled. Modified by use of -gnatw.t/.T. 1637 1638 Warn_On_Suspicious_Modulus_Value : Boolean := True; 1639 -- GNAT 1640 -- Set to True to generate warnings for suspicious modulus values. The 1641 -- default is that this warning is enabled. Modified by -gnatw.m/.M. 1642 1643 Warn_On_Unchecked_Conversion : Boolean := True; 1644 -- GNAT 1645 -- Set to True to generate warnings for unchecked conversions that may have 1646 -- non-portable semantics (e.g. because sizes of types differ). Modified 1647 -- by use of -gnatwz/Z. 1648 1649 Warn_On_Unordered_Enumeration_Type : Boolean := False; 1650 -- GNAT 1651 -- Set to True to generate warnings for inappropriate uses (comparisons 1652 -- and explicit ranges) on unordered enumeration types (which includes 1653 -- all enumeration types for which pragma Ordered is not given). The 1654 -- default is that this warning is disabled. Modified by -gnat.u/.U. 1655 1656 Warn_On_Unrecognized_Pragma : Boolean := True; 1657 -- GNAT 1658 -- Set to True to generate warnings for unrecognized pragmas. The default 1659 -- is that this warning is enabled. Modified by use of -gnatwg/G. 1660 1661 Warn_On_Unrepped_Components : Boolean := False; 1662 -- GNAT 1663 -- Set to True to generate warnings for the case of components of record 1664 -- which have a record representation clause but this component does not 1665 -- have a component clause. Modified by use of -gnatw.c/.C. 1666 1667 Warn_On_Warnings_Off : Boolean := False; 1668 -- GNAT 1669 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent), 1670 -- where either the pragma is never used, or it could be replaced by a 1671 -- pragma Unmodified or Unreferenced. Modified by use of -gnatw.w/.W. 1672 1673 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error); 1674 Warning_Mode : Warning_Mode_Type := Normal; 1675 -- GNAT, GNATBIND 1676 -- Controls treatment of warning messages. If set to Suppress, warning 1677 -- messages are not generated at all. In Normal mode, they are generated 1678 -- but do not count as errors. In Treat_As_Error mode, warning messages 1679 -- are generated and are treated as errors. 1680 1681 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets; 1682 -- GNAT, GNATBIND 1683 -- Method used for encoding wide characters in the source program. See 1684 -- description of type in unit System.WCh_Con for a list of the methods 1685 -- that are currently supported. Note that brackets notation is always 1686 -- recognized in source programs regardless of the setting of this 1687 -- variable. The default setting causes only the brackets notation to be 1688 -- recognized. If this is the main unit, this setting also controls the 1689 -- output of the W=? parameter in the ALI file, which is used to provide 1690 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder, 1691 -- the value set here overrides this main unit default. 1692 1693 Wide_Character_Encoding_Method_Specified : Boolean := False; 1694 -- GNAT, GNATBIND 1695 -- Set True if the value in Wide_Character_Encoding_Method was set as 1696 -- a result of an explicit -gnatW? or -W? switch. False otherwise. 1697 1698 Xref_Active : Boolean := True; 1699 -- GNAT 1700 -- Set if cross-referencing is enabled (i.e. xref info in ALI files) 1701 1702 Zero_Formatting : Boolean := False; 1703 -- GNATBIND 1704 -- Do no formatting (no title, no leading spaces, no empty lines) in 1705 -- auxiliary outputs (-e, -K, -l, -R). 1706 1707 ---------------------------- 1708 -- Configuration Settings -- 1709 ---------------------------- 1710 1711 -- These are settings that are used to establish the mode at the start of 1712 -- each unit. The values defined below can be affected either by command 1713 -- line switches, or by the use of appropriate configuration pragmas in a 1714 -- configuration pragma file. 1715 1716 Ada_Version_Config : Ada_Version_Type; 1717 -- GNAT 1718 -- This is the value of the configuration switch for the Ada 83 mode, as 1719 -- set by the command line switches -gnat83/95/05, and possibly modified by 1720 -- the use of configuration pragmas Ada_*. This switch is used to set the 1721 -- initial value for Ada_Version mode at the start of analysis of a unit. 1722 -- Note however that the setting of this flag is ignored for internal and 1723 -- predefined units (which are always compiled in the most up to date 1724 -- version of Ada). 1725 1726 Ada_Version_Explicit_Config : Ada_Version_Type; 1727 -- GNAT 1728 -- This is set in the same manner as Ada_Version_Config. The difference is 1729 -- that the setting of this flag is not ignored for internal and predefined 1730 -- units, which for some purposes do indeed access this value, regardless 1731 -- of the fact that they are compiled the most up to date ada version). 1732 1733 Assertions_Enabled_Config : Boolean; 1734 -- GNAT 1735 -- This is the value of the configuration switch for assertions enabled 1736 -- mode, as possibly set by the command line switch -gnata, and possibly 1737 -- modified by the use of the configuration pragma Assertion_Policy. 1738 1739 Assume_No_Invalid_Values_Config : Boolean; 1740 -- GNAT 1741 -- This is the value of the configuration switch for assuming "no invalid 1742 -- values enabled" mode, as possibly set by the command line switch 1743 -- -gnatB, and possibly modified by the use of the configuration pragma 1744 -- Assume_No_Invalid_Values. 1745 1746 Check_Float_Overflow_Config : Boolean; 1747 -- GNAT 1748 -- Set to True to check that operations on predefined unconstrained float 1749 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 1750 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 1751 -- of the -gnateF switch. 1752 1753 Check_Policy_List_Config : Node_Id; 1754 -- GNAT 1755 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 1756 -- that are linked through the Next_Pragma fields, with the list being 1757 -- terminated by Empty. The order is most recently processed first. This 1758 -- list includes only those pragmas in configuration pragma files. 1759 1760 Debug_Pragmas_Disabled_Config : Boolean; 1761 -- GNAT 1762 -- This is the value of the configuration switch for debug pragmas disabled 1763 -- mode, as possibly set by use of the configuration pragma Debug_Policy. 1764 1765 Debug_Pragmas_Enabled_Config : Boolean; 1766 -- GNAT 1767 -- This is the value of the configuration switch for debug pragmas enabled 1768 -- mode, as possibly set by the command line switch -gnata and possibly 1769 -- modified by the use of the configuration pragma Debug_Policy. 1770 1771 Default_Pool_Config : Node_Id := Empty; 1772 -- GNAT 1773 -- Same as Default_Pool above, except this is only for Default_Storage_Pool 1774 -- pragmas that are configuration pragmas. 1775 1776 Dynamic_Elaboration_Checks_Config : Boolean := False; 1777 -- GNAT 1778 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 1779 -- switch or by the use of pragma Elaboration_Checking (Dynamic). 1780 1781 Exception_Locations_Suppressed_Config : Boolean := False; 1782 -- GNAT 1783 -- Set True by use of the configuration pragma Suppress_Exception_Messages 1784 1785 Extensions_Allowed_Config : Boolean; 1786 -- GNAT 1787 -- This is the flag that indicates whether extensions are allowed. It can 1788 -- be set True either by use of the -gnatX switch, or by use of the 1789 -- configuration pragma Extensions_Allowed (On). It is always set to True 1790 -- for internal GNAT units, since extensions are always permitted in such 1791 -- units. 1792 1793 External_Name_Exp_Casing_Config : External_Casing_Type; 1794 -- GNAT 1795 -- This is the value of the configuration switch that controls casing of 1796 -- external symbols for which an explicit external name is given. It can be 1797 -- set to Uppercase by the command line switch -gnatF, and further modified 1798 -- by the use of the configuration pragma External_Name_Casing in the 1799 -- gnat.adc file. This flag is used to set the initial value for 1800 -- External_Name_Exp_Casing at the start of analyzing each unit. Note 1801 -- however that the setting of this flag is ignored for internal and 1802 -- predefined units (which are always compiled with As_Is mode). 1803 1804 External_Name_Imp_Casing_Config : External_Casing_Type; 1805 -- GNAT 1806 -- This is the value of the configuration switch that controls casing of 1807 -- external symbols where the external name is implicitly given. It can be 1808 -- set to Uppercase by the command line switch -gnatF, and further modified 1809 -- by the use of the configuration pragma External_Name_Casing in the 1810 -- gnat.adc file. This flag is used to set the initial value for 1811 -- External_Name_Imp_Casing at the start of analyzing each unit. Note 1812 -- however that the setting of this flag is ignored for internal and 1813 -- predefined units (which are always compiled with Lowercase mode). 1814 1815 Fast_Math_Config : Boolean; 1816 -- GNAT 1817 -- This is the value of the configuration switch that controls Fast_Math 1818 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is 1819 -- used to set the initial value of Fast_Math at the start of each new 1820 -- compilation unit. 1821 1822 Initialize_Scalars_Config : Boolean; 1823 -- GNAT 1824 -- This is the value of the configuration switch that is set by the 1825 -- pragma Initialize_Scalars when it appears in the gnat.adc file. 1826 -- This switch is not set when the pragma appears ahead of a given 1827 -- unit, so it does not affect the compilation of other units. 1828 1829 Optimize_Alignment_Config : Character; 1830 -- GNAT 1831 -- This is the value of the configuration switch that controls the 1832 -- alignment optimization mode, as set by an Optimize_Alignment pragma. 1833 -- It is used to set the initial value of Optimize_Alignment at the start 1834 -- of each new compilation unit, except that it is always set to 'O' (off) 1835 -- for internal units. 1836 1837 Persistent_BSS_Mode_Config : Boolean; 1838 -- GNAT 1839 -- This is the value of the configuration switch that controls whether 1840 -- potentially persistent data is to be placed in the persistent_bss 1841 -- section. It can be set True by use of the pragma Persistent_BSS. 1842 -- This flag is used to set the initial value of Persistent_BSS_Mode 1843 -- at the start of each compilation unit, except that it is always 1844 -- set False for predefined units. 1845 1846 Polling_Required_Config : Boolean; 1847 -- GNAT 1848 -- This is the value of the configuration switch that controls polling 1849 -- mode. It can be set True by the command line switch -gnatP, and then 1850 -- further modified by the use of pragma Polling in the gnat.adc file. This 1851 -- flag is used to set the initial value for Polling_Required at the start 1852 -- of analyzing each unit. 1853 1854 Short_Descriptors_Config : Boolean; 1855 -- GNAT 1856 -- This is the value of the configuration switch that controls the use of 1857 -- Short_Descriptors for setting descriptor default sizes. It can be set 1858 -- True by the use of the pragma Short_Descriptors in the gnat.adc file. 1859 -- This flag is used to set the initial value for Short_Descriptors at the 1860 -- start of analyzing each unit. 1861 1862 Use_VADS_Size_Config : Boolean; 1863 -- GNAT 1864 -- This is the value of the configuration switch that controls the use of 1865 -- VADS_Size instead of Size wherever the attribute Size is used. It can 1866 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file. 1867 -- This flag is used to set the initial value for Use_VADS_Size at the 1868 -- start of analyzing each unit. Note however that the setting of this flag 1869 -- is ignored for internal and predefined units (which are always compiled 1870 -- with the standard Size semantics). 1871 1872 type Config_Switches_Type is private; 1873 -- Type used to save values of the switches set from Config values 1874 1875 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type); 1876 -- This procedure saves the current values of the switches which are 1877 -- initialized from the above Config values, and then resets these switches 1878 -- according to the Config value settings. 1879 1880 procedure Set_Opt_Config_Switches 1881 (Internal_Unit : Boolean; 1882 Main_Unit : Boolean); 1883 -- This procedure sets the switches to the appropriate initial values. The 1884 -- parameter Internal_Unit is True for an internal or predefined unit, and 1885 -- affects the way the switches are set (see above). Main_Unit is true if 1886 -- switches are being set for the main unit (this affects setting of the 1887 -- assert/debug pragma switches, which are normally set false by default 1888 -- for an internal unit, except when the internal unit is the main unit, 1889 -- in which case we use the command line settings). 1890 1891 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type); 1892 -- This procedure restores a set of switch values previously saved by a 1893 -- call to Save_Opt_Switches. 1894 1895 procedure Register_Opt_Config_Switches; 1896 -- This procedure is called after processing the gnat.adc file and other 1897 -- configuration pragma files to record the values of the Config switches, 1898 -- as possibly modified by the use of command line switches and pragmas 1899 -- appearing in these files. 1900 1901 ------------------------ 1902 -- Other Global Flags -- 1903 ------------------------ 1904 1905 Expander_Active : Boolean := False; 1906 -- A flag that indicates if expansion is active (True) or deactivated 1907 -- (False). When expansion is deactivated all calls to expander routines 1908 -- have no effect. Note that the initial setting of False is merely to 1909 -- prevent saving of an undefined value for an initial call to the 1910 -- Expander_Mode_Save_And_Set procedure. For more information on the use of 1911 -- this flag, see package Expander. Indeed this flag might more logically 1912 -- be in the spec of Expander, but it is referenced by Errout, and it 1913 -- really seems wrong for Errout to depend on Expander. 1914 -- 1915 -- Note: for many purposes, it is more appropriate to test the flag 1916 -- Full_Expander_Active, which also checks that Alfa mode is not active. 1917 1918 Static_Dispatch_Tables : Boolean := True; 1919 -- This flag indicates if the backend supports generation of statically 1920 -- allocated dispatch tables. If it is True, then the front end will 1921 -- generate static aggregates for dispatch tables that contain forward 1922 -- references to addresses of subprograms not seen yet, and the back end 1923 -- must be prepared to handle this case. If it is False, then the front 1924 -- end generates assignments to initialize the dispatch table, and there 1925 -- are no such forward references. By default we build statically allocated 1926 -- dispatch tables for all library level tagged types in all platforms.This 1927 -- behavior can be disabled using switch -gnatd.t which will set this flag 1928 -- to False and revert to the previous dynamic behavior. 1929 1930 ----------------------- 1931 -- Tree I/O Routines -- 1932 ----------------------- 1933 1934 procedure Tree_Read; 1935 -- Reads switch settings from current tree file using Tree_Read 1936 1937 procedure Tree_Write; 1938 -- Writes out switch settings to current tree file using Tree_Write 1939 1940 -------------------------- 1941 -- ASIS Version Control -- 1942 -------------------------- 1943 1944 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number) 1945 -- are supposed to be used in the GNAT/ASIS version check performed in 1946 -- the ASIS code (this package is also a part of the ASIS implementation). 1947 -- They are set by Tree_Read procedure, so they represent the version 1948 -- number (and the version string) of the compiler which has created the 1949 -- tree, and they are supposed to be compared with the corresponding values 1950 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS 1951 -- implementation. 1952 1953 Tree_Version_String : String_Access; 1954 -- Used to store the compiler version string read from a tree file to check 1955 -- if it is from the same date as stored in the version string in Gnatvsn. 1956 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow 1957 -- non-Pro ASIS and ASIS-based tools to be used with any version of the 1958 -- GNAT compiler. Therefore, we need the possibility to compare the dates 1959 -- of the corresponding source sets, using version strings that may be 1960 -- of different lengths. 1961 1962 Tree_ASIS_Version_Number : Int; 1963 -- Used to store the ASIS version number read from a tree file to check if 1964 -- it is the same as stored in the ASIS version number in Tree_IO. 1965 1966 ----------------------------------- 1967 -- Modes for Formal Verification -- 1968 ----------------------------------- 1969 1970 Alfa_Mode : Boolean := False; 1971 -- Specific compiling mode targeting formal verification through the 1972 -- generation of Why code for those parts of the input code that belong to 1973 -- the Alfa subset of Ada. Set by debug flag -gnatd.F. 1974 1975 Strict_Alfa_Mode : Boolean := False; 1976 -- Interpret compiler permissions as strictly as possible. E.g. base ranges 1977 -- for integers are limited to the strict minimum with this option. Set by 1978 -- debug flag -gnatd.D. 1979 1980 Formal_Extensions : Boolean := False; 1981 -- When this flag is set, new aspects/pragmas/attributes are accepted, 1982 -- whose main purpose is to facilitate formal verification. Set by debug 1983 -- flag -gnatd.V. 1984 1985 function Full_Expander_Active return Boolean; 1986 pragma Inline (Full_Expander_Active); 1987 -- Returns the value of (Expander_Active and not Alfa_Mode). This "flag" 1988 -- indicates that expansion is fully active, that is, not in the reduced 1989 -- mode for Alfa (True) or that expansion is either deactivated, or active 1990 -- in the reduced mode for Alfa (False). For more information on full 1991 -- expansion, see package Expander. For more information on reduced 1992 -- Alfa expansion, see package Exp_Alfa. 1993 1994private 1995 1996 -- The following type is used to save and restore settings of switches in 1997 -- Opt that represent the configuration (i.e. result of config pragmas). 1998 1999 -- Note that Ada_Version_Explicit is not included, since this is a sticky 2000 -- flag that once set does not get reset, since the whole idea of this flag 2001 -- is to record the setting for the main unit. 2002 2003 type Config_Switches_Type is record 2004 Ada_Version : Ada_Version_Type; 2005 Ada_Version_Explicit : Ada_Version_Type; 2006 Assertions_Enabled : Boolean; 2007 Assume_No_Invalid_Values : Boolean; 2008 Check_Float_Overflow : Boolean; 2009 Check_Policy_List : Node_Id; 2010 Debug_Pragmas_Disabled : Boolean; 2011 Debug_Pragmas_Enabled : Boolean; 2012 Default_Pool : Node_Id; 2013 Dynamic_Elaboration_Checks : Boolean; 2014 Exception_Locations_Suppressed : Boolean; 2015 Extensions_Allowed : Boolean; 2016 External_Name_Exp_Casing : External_Casing_Type; 2017 External_Name_Imp_Casing : External_Casing_Type; 2018 Fast_Math : Boolean; 2019 Initialize_Scalars : Boolean; 2020 Normalize_Scalars : Boolean; 2021 Optimize_Alignment : Character; 2022 Optimize_Alignment_Local : Boolean; 2023 Persistent_BSS_Mode : Boolean; 2024 Polling_Required : Boolean; 2025 Short_Descriptors : Boolean; 2026 Use_VADS_Size : Boolean; 2027 end record; 2028 2029 -- The following declarations are for GCC version dependent flags. We do 2030 -- not let client code in the compiler test GCC_Version directly, but 2031 -- instead use deferred constants for relevant feature tags. 2032 2033 -- Note: there currently are no such constants defined in this section, 2034 -- since the compiler front end is currently entirely independent of the 2035 -- GCC version, which is a desirable state of affairs. 2036 2037 function get_gcc_version return Int; 2038 pragma Import (C, get_gcc_version, "get_gcc_version"); 2039 2040 GCC_Version : constant Nat := get_gcc_version; 2041 -- GNATMAKE 2042 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that 2043 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported. 2044 2045end Opt; 2046