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_2012; 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 Ada_Version : Ada_Version_Type := Ada_Version_Default; 129 -- GNAT 130 -- Current Ada version for compiler, as set by configuration pragmas, 131 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a 132 -- predefined or internal file is compiled. 133 134 Ada_Version_Pragma : Node_Id := Empty; 135 -- Reflects the Ada_xxx pragma that resulted in setting Ada_Version. Used 136 -- to specialize error messages complaining about the Ada version in use. 137 138 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default; 139 -- GNAT 140 -- Like Ada_Version, but does not get set implicitly for predefined 141 -- or internal units, so it reflects the Ada version explicitly set 142 -- using configuration pragmas or compiler switches (or if neither 143 -- appears, it remains set to Ada_Version_Default). This is used in 144 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05/12) 145 -- where in the run-time we want the explicit version set. 146 147 Ada_Version_Runtime : Ada_Version_Type := Ada_2012; 148 -- GNAT 149 -- Ada version used to compile the runtime. Used to set Ada_Version (but 150 -- not Ada_Version_Explicit) when compiling predefined or internal units. 151 152 Ada_Final_Suffix : constant String := "final"; 153 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix); 154 -- GNATBIND 155 -- The name of the procedure that performs the finalization at the end of 156 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 157 158 Ada_Init_Suffix : constant String := "init"; 159 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix); 160 -- GNATBIND 161 -- The name of the procedure that performs initialization at the start 162 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 163 164 Ada_Main_Name_Suffix : constant String := "main"; 165 -- GNATBIND 166 -- The suffix for Ada_Main_Name. Defined as a constant here so that it 167 -- can be referenced in a uniform manner to create either the default 168 -- value of Ada_Main_Name (declared below), or the non-default name 169 -- set by Gnatbind.Scan_Bind_Arg. 170 171 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix); 172 -- GNATBIND 173 -- The name of the Ada package generated by the binder (when in Ada mode). 174 -- This variable may be modified by Gnatbind.Scan_Bind_Arg. 175 176 Address_Clause_Overlay_Warnings : Boolean := True; 177 -- GNAT 178 -- Set False to disable address clause warnings. Modified by use of 179 -- -gnatwo/O. 180 181 Address_Is_Private : Boolean := False; 182 -- GNAT, GNATBIND 183 -- Set True if package System has the line "type Address is private;" 184 185 All_Errors_Mode : Boolean := False; 186 -- GNAT 187 -- Flag set to force display of multiple errors on a single line and 188 -- also repeated error messages for references to undefined identifiers 189 -- and certain other repeated error messages. Set by use of -gnatf. 190 191 Allow_Integer_Address : Boolean := False; 192 -- GNAT 193 -- Allow use of integer expression in a context requiring System.Address. 194 -- Set by the use of configuration pragma Allow_Integer_Address Also set 195 -- in relaxed semantics mode for use by CodePeer or when -gnatd.M is used. 196 197 All_Sources : Boolean := False; 198 -- GNATBIND 199 -- Set to True to require all source files to be present. This flag is 200 -- directly modified by gnatmake to affect the shared binder routines. 201 202 Alternate_Main_Name : String_Ptr := null; 203 -- GNATBIND 204 -- Set to non null when Bind_Alternate_Main_Name is True. This value 205 -- is modified as needed by Gnatbind.Scan_Bind_Arg. 206 207 ASIS_Mode : Boolean := False; 208 -- GNAT 209 -- Enable semantic checks and tree transformations that are important 210 -- for ASIS but that are usually skipped if Operating_Mode is set to 211 -- Check_Semantics. This flag does not have the corresponding option to set 212 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON 213 -- from the code of GNSA-based tool (a client may need to set ON the 214 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not 215 -- make very much sense, because GNSA cannot do back annotation). 216 217 Assertions_Enabled : Boolean := False; 218 -- GNAT 219 -- Indicates default policy (True = Check, False = Ignore) to be applied 220 -- to all assertion aspects and pragmas, and to pragma Debug, if there is 221 -- no overriding Assertion_Policy, Check_Policy, or Debug_Policy pragma. 222 -- Set True by use of -gnata. 223 224 Assume_No_Invalid_Values : Boolean := False; 225 -- GNAT Normally, in accordance with (RM 13.9.1 (9-11)) the front end 226 -- assumes that values could have invalid representations, unless it can 227 -- clearly prove that the values are valid. If this switch is set (by 228 -- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values 229 -- are valid and in range of their representations. This feature is now 230 -- fully enabled in the compiler. 231 232 Back_Annotate_Rep_Info : Boolean := False; 233 -- GNAT 234 -- If set True, enables back annotation of representation information 235 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR 236 -- (list representation information) or -gnatt (generate tree). It is 237 -- also set true if certain Unchecked_Conversion instantiations require 238 -- checking based on annotated values. 239 240 Back_End_Handles_Limited_Types : Boolean; 241 -- This flag is set true if the back end can properly handle limited or 242 -- other by reference types, and avoid copies. If this flag is False, then 243 -- the front end does special expansion for if/case expressions to make 244 -- sure that no copy occurs. If the flag is True, then the expansion for 245 -- if and case expressions relies on the back end properly handling things. 246 -- Currently the default is False for all cases (set in gnat1drv). The 247 -- default can be modified using -gnatd.L (sets the flag True). This is 248 -- used to test the possibility of having the backend handle this. 249 250 Bind_Alternate_Main_Name : Boolean := False; 251 -- GNATBIND 252 -- True if main should be called Alternate_Main_Name.all. 253 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg. 254 255 Bind_Main_Program : Boolean := True; 256 -- GNATBIND 257 -- Set to False if not binding main Ada program 258 259 Bind_For_Library : Boolean := False; 260 -- GNATBIND 261 -- Set to True if the binder needs to generate a file designed for building 262 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg. 263 264 Bind_Only : Boolean := False; 265 -- GNATMAKE, GPRMAKE, GPRBUILD 266 -- Set to True to skip compile and link steps 267 -- (except when Compile_Only and/or Link_Only are True). 268 269 Blank_Deleted_Lines : Boolean := False; 270 -- GNAT, GNATPREP 271 -- Output empty lines for each line of preprocessed input that is deleted 272 -- in the output, including preprocessor lines starting with a '#'. 273 274 Brief_Output : Boolean := False; 275 -- GNAT, GNATBIND 276 -- Force brief error messages to standard error, even if verbose mode is 277 -- set (so that main error messages go to standard output). 278 279 Build_Bind_And_Link_Full_Project : Boolean := False; 280 -- GNATMAKE 281 -- Set to True to build, bind and link all the sources of a project file 282 -- (switch -B) 283 284 Check_Aliasing_Of_Parameters : Boolean := False; 285 -- GNAT 286 -- Set to True to detect whether subprogram parameters and function results 287 -- alias the same object(s). 288 289 Check_Float_Overflow : Boolean := False; 290 -- GNAT 291 -- Set to True to check that operations on predefined unconstrained float 292 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 293 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 294 -- of the -gnateF switch. 295 296 Check_Object_Consistency : Boolean := False; 297 -- GNATBIND, GNATMAKE 298 -- Set to True to check whether every object file is consistent with its 299 -- corresponding ada library information (ALI) file. An object file is 300 -- inconsistent with the corresponding ALI file if the object file does 301 -- not exist or if it has an older time stamp than the ALI file. Default 302 -- above is for GNATBIND. GNATMAKE overrides this default to True (see 303 -- Make.Initialize) since we normally do need to check source consistencies 304 -- in gnatmake. 305 306 Check_Only : Boolean := False; 307 -- GNATBIND 308 -- Set to True to do checks only, no output of binder file 309 310 Check_Policy_List : Node_Id := Empty; 311 -- GNAT 312 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 313 -- that are linked through the Next_Pragma fields, with the list being 314 -- terminated by Empty. The order is most recently processed first. Note 315 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value 316 -- of this variable, implementing the required scope control for pragmas 317 -- appearing in a declarative part. 318 319 Check_Readonly_Files : Boolean := False; 320 -- GNATMAKE 321 -- Set to True to check readonly files during the make process 322 323 Check_Source_Files : Boolean := True; 324 -- GNATBIND, GNATMAKE 325 -- Set to True to enable consistency checking for any source files that 326 -- are present (i.e. date must match the date in the library info file). 327 -- Set to False for object file consistency check only. This flag is 328 -- directly modified by gnatmake, to affect the shared binder routines. 329 330 Check_Switches : Boolean := False; 331 -- GNATMAKE, GPRMAKE, GPBUILD 332 -- Set to True to check compiler options during the make process 333 334 Check_Unreferenced : Boolean := False; 335 -- GNAT 336 -- Set to True to enable checking for unreferenced entities other 337 -- than formal parameters (for which see Check_Unreferenced_Formals) 338 -- Modified by use of -gnatwu/U. 339 340 Check_Unreferenced_Formals : Boolean := False; 341 -- GNAT 342 -- Set to True to check for unreferenced formals. This is turned on by 343 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU. 344 345 Check_Validity_Of_Parameters : Boolean := False; 346 -- GNAT 347 -- Set to True to check for proper scalar initialization of subprogram 348 -- parameters on both entry and exit. Turned on by??? turned off by??? 349 350 Check_Withs : Boolean := False; 351 -- GNAT 352 -- Set to True to enable checking for unused withs, and also the case 353 -- of withing a package and using none of the entities in the package. 354 -- Modified by use of -gnatwu/U. 355 356 CodePeer_Mode : Boolean := False; 357 -- GNAT, GNATBIND, GPRBUILD 358 -- Enable full CodePeer mode (SCIL generation, disable switches that 359 -- interact badly with it, etc...). This is turned on by -gnatC. 360 361 Commands_To_Stdout : Boolean := False; 362 -- GNATMAKE 363 -- True if echoed commands to be written to stdout instead of stderr 364 365 Comment_Deleted_Lines : Boolean := False; 366 -- GNATPREP 367 -- True if source lines removed by the preprocessor should be commented 368 -- in the output file. 369 370 Compile_Only : Boolean := False; 371 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN 372 -- GNATMAKE, GPRMAKE, GPRMAKE: 373 -- set to True to skip bind and link steps (except when Bind_Only is 374 -- True). 375 -- GNATCLEAN, GPRCLEAN: 376 -- set to True to delete only the files produced by the compiler but not 377 -- the library files or the executable files. 378 379 Config_File : Boolean := True; 380 -- GNAT 381 -- Set to False to inhibit reading and processing of gnat.adc file 382 383 Config_File_Names : String_List_Access := null; 384 -- GNAT 385 -- Names of configuration pragmas files (given by switches -gnatec) 386 387 Configurable_Run_Time_Mode : Boolean := False; 388 -- GNAT, GNATBIND 389 -- Set True if the compiler is operating in configurable run-time mode. 390 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target 391 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind 392 -- for details on the handling of the latter pragma. 393 394 Constant_Condition_Warnings : Boolean := False; 395 -- GNAT 396 -- Set to True to activate warnings on constant conditions. Modified by 397 -- use of -gnatwc/C. 398 399 Create_Mapping_File : Boolean := False; 400 -- GNATMAKE, GPRMAKE 401 -- Set to True (-C switch) to indicate that the compiler will be invoked 402 -- with a mapping file (-gnatem compiler switch). 403 404 subtype Debug_Level_Value is Nat range 0 .. 3; 405 Debugger_Level : Debug_Level_Value := 0; 406 -- GNATBIND 407 -- The value given to the -g parameter. The default value for -g with 408 -- no value is 2. This is usually ignored by GNATBIND, except in the 409 -- VMS version where it is passed as an argument to __gnat_initialize 410 -- to trigger the activation of the remote debugging interface. 411 -- Is this still true ??? 412 413 Debug_Generated_Code : Boolean := False; 414 -- GNAT 415 -- Set True (-gnatD switch) to debug generated expanded code instead 416 -- of the original source code. Causes debugging information to be 417 -- written with respect to the generated code file that is written. 418 419 Default_Exit_Status : Int := 0; 420 -- GNATBIND 421 -- Set the default exit status value. Set by the -Xnnn switch for the 422 -- binder. 423 424 Default_Stack_Size : Int := -1; 425 -- GNATBIND 426 -- Set to default primary stack size in units of bytes. Set by 427 -- the -dnnn switch for the binder. A value of -1 indicates that no 428 -- default was set by the binder. 429 430 Default_Sec_Stack_Size : Int := -1; 431 -- GNATBIND 432 -- Set to default secondary stack size in units of bytes. Set by 433 -- the -Dnnn switch for the binder. A value of -1 indicates that no 434 -- default was set by the binder, and that the default should be the 435 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size. 436 437 Default_Pool : Node_Id := Empty; 438 -- GNAT 439 -- Used to record the storage pool name (or null literal) that is the 440 -- argument of an applicable pragma Default_Storage_Pool. 441 -- Empty: No pragma Default_Storage_Pool applies. 442 -- N_Null node: "pragma Default_Storage_Pool (null);" applies. 443 -- otherwise: "pragma Default_Storage_Pool (X);" applies, and 444 -- this points to the name X. 445 -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value. 446 447 Detect_Blocking : Boolean := False; 448 -- GNAT 449 -- Set True to force the run time to raise Program_Error if calls to 450 -- potentially blocking operations are detected from protected actions. 451 452 Directories_Must_Exist_In_Projects : Boolean := True; 453 -- PROJECT MANAGER 454 -- Set to False with switch -f of gnatclean and gprclean 455 456 Display_Compilation_Progress : Boolean := False; 457 -- GNATMAKE, GPRMAKE, GPRBUILD 458 -- Set True (-d switch) to display information on progress while compiling 459 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS). 460 461 type Distribution_Stub_Mode_Type is 462 -- GNAT 463 (No_Stubs, 464 -- Normal mode, no generation/compilation of distribution stubs 465 466 Generate_Receiver_Stub_Body, 467 -- The unit being compiled is the RCI body, and the compiler will 468 -- generate the body for the receiver stubs and compile it. 469 470 Generate_Caller_Stub_Body); 471 -- The unit being compiled is the RCI spec, and the compiler will 472 -- generate the body for the caller stubs and compile it. 473 474 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs; 475 -- GNAT 476 -- This enumeration variable indicates the five states of distribution 477 -- annex stub generation/compilation. 478 479 Do_Not_Execute : Boolean := False; 480 -- GNATMAKE 481 -- Set to True if no actual compilations should be undertaken. 482 483 Dump_Source_Text : Boolean := False; 484 -- GNAT 485 -- Set to True (by -gnatL) to dump source text intermingled with generated 486 -- code. Effective only if either of Debug/Print_Generated_Code is true. 487 488 Dynamic_Elaboration_Checks : Boolean := False; 489 -- GNAT 490 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 491 -- switch or by the use of pragma Elaboration_Checks (Dynamic). 492 493 Dynamic_Stack_Measurement : Boolean := False; 494 -- GNATBIND 495 -- Set True to enable dynamic stack measurement (-u flag for gnatbind) 496 497 Dynamic_Stack_Measurement_Array_Size : Nat := 100; 498 -- GNATBIND 499 -- Number of measurements we want to store during dynamic stack analysis. 500 -- When the buffer is full, non-storable results will be output on the fly. 501 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set 502 -- by processing of -u flag for gnatbind. 503 504 Elab_Dependency_Output : Boolean := False; 505 -- GNATBIND 506 -- Set to True to output complete list of elaboration constraints 507 508 Elab_Order_Output : Boolean := False; 509 -- GNATBIND 510 -- Set to True to output chosen elaboration order 511 512 Elab_Info_Messages : Boolean := False; 513 -- GNAT 514 -- Set to True to output info messages for static elabmodel (-gnatel) 515 516 Elab_Warnings : Boolean := False; 517 -- GNAT 518 -- Set to True to generate elaboration warnings (-gnatwl) 519 520 Error_Msg_Line_Length : Nat := 0; 521 -- GNAT 522 -- Records the error message line length limit. If this is set to zero, 523 -- then we get the old style behavior, in which each call to the error 524 -- message routines generates one line of output as a separate message. 525 -- If it is set to a non-zero value, then continuation lines are folded 526 -- to make a single long message, and then this message is split up into 527 -- multiple lines not exceeding the specified length. Set by -gnatj=nn. 528 529 Error_To_Warning : Boolean := False; 530 -- GNAT 531 -- If True, then certain error messages (e.g. parameter overlap messages 532 -- for procedure calls in Ada 2012 mode) are treated as warnings instead 533 -- of errors. Set by debug flag -gnatd.E. A search for Error_To_Warning 534 -- will identify affected messages. 535 536 Exception_Handler_Encountered : Boolean := False; 537 -- GNAT 538 -- This flag is set true if the parser encounters an exception handler. 539 -- It is used to set Warn_On_Exception_Propagation True if the restriction 540 -- No_Exception_Propagation is set. 541 542 Exception_Extra_Info : Boolean := False; 543 -- GNAT 544 -- True when switch -gnateE is used. When True, generate extra information 545 -- associated with exception messages (in particular range and index 546 -- checks). 547 548 Exception_Locations_Suppressed : Boolean := False; 549 -- GNAT 550 -- Set to True if a Suppress_Exception_Locations configuration pragma is 551 -- currently active. 552 553 type Exception_Mechanism_Type is 554 -- Determines the handling of exceptions. See Exp_Ch11 for details 555 -- 556 (Front_End_Setjmp_Longjmp_Exceptions, 557 -- Exceptions use setjmp/longjmp generated explicitly by the front end 558 -- (this includes gigi or other equivalent parts of the code generator). 559 -- AT END handlers are converted into exception handlers by the front 560 -- end in this mode. 561 562 Back_End_Exceptions); 563 -- Exceptions are handled by the back end. The front end simply 564 -- generates the handlers as they appear in the source, and AT END 565 -- handlers are left untouched (they are not converted into exception 566 -- handlers when operating in this mode. 567 pragma Convention (C, Exception_Mechanism_Type); 568 569 Exception_Mechanism : Exception_Mechanism_Type := 570 Front_End_Setjmp_Longjmp_Exceptions; 571 -- GNAT 572 -- Set to the appropriate value depending on the default as given in 573 -- system.ads (ZCX_By_Default). The C convention is there to make this 574 -- variable accessible to gigi. 575 576 Exception_Tracebacks : Boolean := False; 577 -- GNATBIND 578 -- Set to True to store tracebacks in exception occurrences (-E) 579 580 Extensions_Allowed : Boolean := False; 581 -- GNAT 582 -- Set to True by switch -gnatX if GNAT specific language extensions 583 -- are allowed. Currently there are no such defined extensions. 584 585 type External_Casing_Type is ( 586 As_Is, -- External names cased as they appear in the Ada source 587 Uppercase, -- External names forced to all uppercase letters 588 Lowercase); -- External names forced to all lowercase letters 589 590 External_Name_Imp_Casing : External_Casing_Type := Lowercase; 591 -- GNAT 592 -- The setting of this flag determines the casing of external names 593 -- when the name is implicitly derived from an entity name (i.e. either 594 -- no explicit External_Name or Link_Name argument is used, or, in the 595 -- case of extended DEC pragmas, the external name is given using an 596 -- identifier. The As_Is setting is not permitted here (since this would 597 -- create Ada source programs that were case sensitive). 598 599 External_Name_Exp_Casing : External_Casing_Type := As_Is; 600 -- GNAT 601 -- The setting of this flag determines the casing of an external name 602 -- specified explicitly with a string literal. As_Is means the string 603 -- literal is used as given with no modification to the casing. If 604 -- Lowercase or Uppercase is set, then the string is forced to all 605 -- lowercase or all uppercase letters as appropriate. Note that this 606 -- setting has no effect if the external name is given using an identifier 607 -- in the case of extended DEC import/export pragmas (in this case the 608 -- casing is controlled by External_Name_Imp_Casing), and also has no 609 -- effect if an explicit Link_Name is supplied (a link name is always 610 -- used exactly as given). 611 612 External_Unit_Compilation_Allowed : Boolean := False; 613 -- GNATMAKE 614 -- When True (set by gnatmake switch -x), allow compilation of sources 615 -- that are not part of any project file. 616 617 Fast_Math : Boolean := False; 618 -- GNAT 619 -- Indicates the current setting of Fast_Math mode, as set by the use 620 -- of a Fast_Math pragma (set True by Fast_Math (On)). 621 622 Float_Format : Character := ' '; 623 -- GNAT 624 -- A non-blank value indicates that a Float_Format pragma has been 625 -- processed, in which case this variable is set to 'I' for IEEE or to 626 -- 'V' for VAX. The setting of 'V' is only possible on OpenVMS versions 627 -- of GNAT. 628 629 Float_Format_Long : Character := ' '; 630 -- GNAT 631 -- A non-blank value indicates that a Long_Float pragma has been processed 632 -- (this pragma is recognized only in OpenVMS versions of GNAT), in which 633 -- case this variable is set to D or G for D_Float or G_Float. 634 635 Force_ALI_Tree_File : Boolean := False; 636 -- GNAT 637 -- Force generation of ALI file even if errors are encountered. Also forces 638 -- generation of tree file if -gnatt is also set. Set on by use of -gnatQ. 639 640 Disable_ALI_File : Boolean := False; 641 -- GNAT 642 -- Disable generation of ALI file 643 644 Force_Checking_Of_Elaboration_Flags : Boolean := False; 645 -- GNATBIND 646 -- True if binding with forced checking of the elaboration flags 647 -- (-F switch set). 648 649 Force_Compilations : Boolean := False; 650 -- GNATMAKE, GPRMAKE, GPRBUILD 651 -- Set to force recompilations even when the objects are up-to-date. 652 653 Full_Path_Name_For_Brief_Errors : Boolean := False; 654 -- PROJECT MANAGER 655 -- When True, in Brief_Output mode, each error message line 656 -- will start with the full path name of the source. 657 -- When False, only the file name without directory information 658 -- is used. 659 660 Full_List : Boolean := False; 661 -- GNAT 662 -- Set True to generate full source listing with embedded errors 663 664 Full_List_File_Name : String_Ptr := null; 665 -- GNAT 666 -- Set to file name to generate full source listing to named file (or if 667 -- the name is of the form .xxx, then to name.xxx where name is the source 668 -- file name with extension stripped. 669 670 Generate_CodePeer_Messages : Boolean := False; 671 -- GNAT 672 -- Generate CodePeer messages. Ignored if CodePeer_Mode is false. 673 -- This is turned on by -gnateC. 674 675 Generate_Processed_File : Boolean := False; 676 -- GNAT 677 -- True when switch -gnateG is used. When True, create in a file 678 -- <source>.prep, if the source is preprocessed. 679 680 Generate_SCO : Boolean := False; 681 -- GNAT 682 -- True when switch -fdump-scos (or -gnateS) is used. When True, Source 683 -- Coverage Obligation (SCO) information is generated and output in the ALI 684 -- file. See unit Par_SCO for full details. 685 686 Generate_SCO_Instance_Table : Boolean := False; 687 -- GNAT 688 -- True when switch -fdebug-instances is used. When True, a table of 689 -- instances is included in SCOs. 690 691 Generating_Code : Boolean := False; 692 -- GNAT 693 -- True if the frontend finished its work and has called the backend to 694 -- process the tree and generate the object file. 695 696 Global_Discard_Names : Boolean := False; 697 -- GNAT, GNATBIND 698 -- True if a pragma Discard_Names appeared as a configuration pragma for 699 -- the current compilation unit. 700 701 GNAT_Mode : Boolean := False; 702 -- GNAT 703 -- True if compiling in GNAT system mode (-gnatg switch) 704 705 Heap_Size : Nat := 0; 706 -- GNATBIND 707 -- Heap size for memory allocations. Valid values are 32 and 64. Only 708 -- available on VMS. 709 710 Identifier_Character_Set : Character; 711 -- GNAT 712 -- This variable indicates the character set to be used for identifiers. 713 -- The possible settings are: 714 -- '1' Latin-1 (ISO-8859-1) 715 -- '2' Latin-2 (ISO-8859-2) 716 -- '3' Latin-3 (ISO-8859-3) 717 -- '4' Latin-4 (ISO-8859-4) 718 -- '5' Latin-Cyrillic (ISO-8859-5) 719 -- '9' Latin-9 (ISO-8859-15) 720 -- 'p' PC (US, IBM page 437) 721 -- '8' PC (European, IBM page 850) 722 -- 'f' Full upper set (all distinct) 723 -- 'n' No upper characters (Ada 83 rules) 724 -- 'w' Latin-1 plus wide characters allowed in identifiers 725 -- 726 -- The setting affects the set of letters allowed in identifiers and the 727 -- upper/lower case equivalences. It does not affect the interpretation of 728 -- character and string literals, which are always stored using the actual 729 -- coding in the source program. This variable is initialized to the 730 -- default value appropriate to the system (in Osint.Initialize), and then 731 -- reset if a command line switch is used to change the setting. 732 733 Ignore_Rep_Clauses : Boolean := False; 734 -- GNAT 735 -- Set True to ignore all representation clauses. Useful when compiling 736 -- code from foreign compilers for checking or ASIS purposes. Can be 737 -- set True by use of -gnatI. 738 739 Ignore_Style_Checks_Pragmas : Boolean := False; 740 -- GNAT 741 -- Set True to ignore all Style_Checks pragmas. Can be set True by use 742 -- of -gnateY. 743 744 Ignore_Unrecognized_VWY_Switches : Boolean := False; 745 -- GNAT 746 -- Set True to ignore unrecognized y, V, w switches. Can be set True 747 -- by use of -gnateu, causing subsequent unrecognized switches to result 748 -- in a warning rather than an error. 749 750 Implementation_Unit_Warnings : Boolean := True; 751 -- GNAT 752 -- Set True to active warnings for use of implementation internal units. 753 -- Modified by use of -gnatwi/-gnatwI. 754 755 Implicit_Packing : Boolean := False; 756 -- GNAT 757 -- If set True, then a Size attribute clause on an array is allowed to 758 -- cause implicit packing instead of generating an error message. Set by 759 -- use of pragma Implicit_Packing. 760 761 Ineffective_Inline_Warnings : Boolean := False; 762 -- GNAT 763 -- Set True to activate warnings if front-end inlining (-gnatN) is not 764 -- able to actually inline a particular call (or all calls). Can be 765 -- controlled by use of -gnatwp/-gnatwP. 766 767 Init_Or_Norm_Scalars : Boolean := False; 768 -- GNAT, GANTBIND 769 -- Set True if a pragma Initialize_Scalars applies to the current unit. 770 -- Also set True if a pragma Normalize_Scalars applies. 771 772 Initialize_Scalars : Boolean := False; 773 -- GNAT 774 -- Set True if a pragma Initialize_Scalars applies to the current unit. 775 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 776 777 Initialize_Scalars_Mode1 : Character := 'I'; 778 Initialize_Scalars_Mode2 : Character := 'N'; 779 -- GNATBIND 780 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default 781 -- is IN (invalid values), used if no -S switch is used. 782 783 Inline_Active : Boolean := False; 784 -- GNAT 785 -- Set True to activate pragma Inline processing across modules. Default 786 -- for now is not to inline across module boundaries. 787 788 Inline_Level : Nat := 0; 789 -- GNAT 790 -- Set to indicate the inlining level: 0 means that an appropriate value is 791 -- to be computed by the compiler based on the optimization level (-gnatn), 792 -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full 793 -- inlining across modules (-gnatn2). 794 795 Interface_Library_Unit : Boolean := False; 796 -- GNATBIND 797 -- Set to True to indicate that at least one ALI file is an interface ALI: 798 -- then elaboration flag checks are to be generated in the binder 799 -- generated file. 800 801 Generate_SCIL : Boolean := False; 802 -- GNAT 803 -- Set True to activate SCIL code generation. 804 805 Invalid_Value_Used : Boolean := False; 806 -- GNAT 807 -- Set True if a valid Invalid_Value attribute is encountered 808 809 Follow_Links_For_Files : Boolean := False; 810 -- PROJECT MANAGER 811 -- Set to True (-eL) to process the project files in trusted mode. If 812 -- Follow_Links is False, it is assumed that the project doesn't contain 813 -- any file duplicated through symbolic links (although the latter are 814 -- still valid if they point to a file which is outside of the project), 815 -- and that no directory has a name which is a valid source name. 816 817 Follow_Links_For_Dirs : Boolean := False; 818 -- PROJECT MANAGER 819 -- Set to True if directories can be links in this project, and therefore 820 -- additional system calls must be performed to ensure that we always see 821 -- the same full name for each directory. 822 823 Front_End_Inlining : Boolean := False; 824 -- GNAT 825 -- Set True to activate inlining by front-end expansion 826 827 Inline_Processing_Required : Boolean := False; 828 -- GNAT 829 -- Set True if inline processing is required. Inline processing is required 830 -- if an active Inline pragma is processed. The flag is set for a pragma 831 -- Inline or Inline_Always that is actually active. 832 833 In_Place_Mode : Boolean := False; 834 -- GNATMAKE 835 -- Set True to store ALI and object files in place i.e. in the object 836 -- directory if these files already exist or in the source directory 837 -- if not. 838 839 Keep_Going : Boolean := False; 840 -- GNATMAKE, GPRMAKE, GPRBUILD 841 -- When True signals to ignore compilation errors and keep processing 842 -- sources until there is no more work. 843 844 Keep_Temporary_Files : Boolean := False; 845 -- GNATCMD 846 -- When True the temporary files created by the GNAT driver are not 847 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES. 848 849 Leap_Seconds_Support : Boolean := False; 850 -- GNATBIND 851 -- Set to True to enable leap seconds support in Ada.Calendar and its 852 -- children. 853 854 Link_Only : Boolean := False; 855 -- GNATMAKE, GPRMAKE, GPRBUILD 856 -- Set to True to skip compile and bind steps (except when Bind_Only is 857 -- set to True). 858 859 List_Body_Required_Info : Boolean := False; 860 -- GNATMAKE 861 -- List info messages about why a package requires a body. Modified by use 862 -- of -gnatw.y/.Y. 863 864 List_Inherited_Aspects : Boolean := False; 865 -- GNAT 866 -- List inherited invariants, preconditions, and postconditions from 867 -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited 868 -- subtype predicates. Modified by use of -gnatw.l/.L. 869 870 List_Restrictions : Boolean := False; 871 -- GNATBIND 872 -- Set to True to list restrictions pragmas that could apply to partition 873 874 List_Units : Boolean := False; 875 -- GNAT 876 -- List units in the active library for a compilation (-gnatu switch) 877 878 List_Closure : Boolean := False; 879 -- GNATBIND 880 -- List all sources in the closure of a main (-R gnatbind switch) 881 882 List_Dependencies : Boolean := False; 883 -- GNATMAKE 884 -- When True gnatmake verifies that the objects are up to date and 885 -- outputs the list of object dependencies (-M switch). 886 -- Output depends if -a switch is used or not. 887 -- This list can be used directly in a Makefile. 888 889 List_Representation_Info : Int range 0 .. 3 := 0; 890 -- GNAT 891 -- Set non-zero by -gnatR switch to list representation information. 892 -- The settings are as follows: 893 -- 894 -- 0 = no listing of representation information (default as above) 895 -- 1 = list rep info for user defined record and array types 896 -- 2 = list rep info for all user defined types and objects 897 -- 3 = like 2, but variable fields are decoded symbolically 898 899 List_Representation_Info_To_File : Boolean := False; 900 -- GNAT 901 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3/m to be 902 -- written to file.rep (where file is the name of the source file) instead 903 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then 904 -- representation info is written to x.adb.ref. 905 906 List_Representation_Info_Mechanisms : Boolean := False; 907 -- GNAT 908 -- Set true by -gnatRm switch. Causes information on mechanisms to be 909 -- included in the representation output information. 910 911 List_Preprocessing_Symbols : Boolean := False; 912 -- GNAT, GNATPREP 913 -- Set to True if symbols for preprocessing a source are to be listed 914 -- before preprocessing occurs. Set to True by switch -s of gnatprep or 915 -- -s in preprocessing data file for the compiler. 916 917 type Create_Repinfo_File_Proc is access procedure (Src : String); 918 type Write_Repinfo_Line_Proc is access procedure (Info : String); 919 type Close_Repinfo_File_Proc is access procedure; 920 -- Types used for procedure addresses below 921 922 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null; 923 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null; 924 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null; 925 -- GNAT 926 -- These three locations are left null when operating in non-compiler (e.g. 927 -- ASIS mode), but when operating in compiler mode, they are set to point 928 -- to the three corresponding procedures in Osint-C. The reason for this 929 -- slightly strange interface is to stop Repinfo from dragging in Osint in 930 -- ASIS mode, which would include lots of unwanted units in the ASIS build. 931 932 type Create_List_File_Proc is access procedure (S : String); 933 type Write_List_Info_Proc is access procedure (S : String); 934 type Close_List_File_Proc is access procedure; 935 -- Types used for procedure addresses below 936 937 Create_List_File_Access : Create_List_File_Proc := null; 938 Write_List_Info_Access : Write_List_Info_Proc := null; 939 Close_List_File_Access : Close_List_File_Proc := null; 940 -- GNAT 941 -- These three locations are left null when operating in non-compiler 942 -- (e.g. from the binder), but when operating in compiler mode, they are 943 -- set to point to the three corresponding procedures in Osint-C. The 944 -- reason for this slightly strange interface is to prevent Repinfo 945 -- from dragging in Osint-C in the binder, which would include unwanted 946 -- units in the binder. 947 948 Locking_Policy : Character := ' '; 949 -- GNAT, GNATBIND 950 -- Set to ' ' for the default case (no locking policy specified). Reset to 951 -- first character (uppercase) of locking policy name if a valid pragma 952 -- Locking_Policy is encountered. 953 954 Locking_Policy_Sloc : Source_Ptr := No_Location; 955 -- GNAT, GNATBIND 956 -- Remember location of previous Locking_Policy pragma. This is used for 957 -- inconsistency error messages. A value of System_Location is used if the 958 -- policy is set in package System. 959 960 Look_In_Primary_Dir : Boolean := True; 961 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN 962 -- Set to False if a -I- was present on the command line. When True we are 963 -- allowed to look in the primary directory to locate other source or 964 -- library files. 965 966 Make_Steps : Boolean := False; 967 -- GNATMAKE 968 -- Set to True when either Compile_Only, Bind_Only or Link_Only is 969 -- set to True. 970 971 Main_Index : Int := 0; 972 -- GNATMAKE 973 -- This is set to non-zero by gnatmake switch -eInnn to indicate that 974 -- the main program is the nnn unit in a multi-unit source file. 975 976 Mapping_File_Name : String_Ptr := null; 977 -- GNAT 978 -- File name of mapping between unit names, file names and path names. 979 -- (given by switch -gnatem) 980 981 Maximum_Messages : Int := 9999; 982 -- GNAT, GNATBIND 983 -- Maximum default number of errors before compilation is terminated, or in 984 -- the case of GNAT, maximum number of warnings before further warnings are 985 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch. 986 987 Maximum_File_Name_Length : Int; 988 -- GNAT, GNATBIND 989 -- Maximum number of characters allowed in a file name, not counting the 990 -- extension, as set by the appropriate switch. If no switch is given, 991 -- then this value is initialized by Osint to the appropriate value. 992 993 Maximum_Instantiations : Int := 8000; 994 -- GNAT 995 -- Maximum number of instantiations permitted (to stop runaway cases 996 -- of nested instantiations). These situations probably only occur in 997 -- specially concocted test cases. Can be modified by -gnateinn switch. 998 999 Maximum_Processes : Positive := 1; 1000 -- GNATMAKE, GPRMAKE, GPRBUILD 1001 -- Maximum number of processes that should be spawned to carry out 1002 -- compilations. 1003 1004 Minimal_Recompilation : Boolean := False; 1005 -- GNATMAKE 1006 -- Set to True if minimal recompilation mode requested 1007 1008 Modify_Tree_For_C : Boolean := False; 1009 -- GNAT 1010 -- If this switch is set True (currently it is set only by -gnatd.V), then 1011 -- certain meaning-preserving transformations are applied to the tree to 1012 -- make it easier to interface with back ends that implement C semantics. 1013 -- There is a section in Sinfo which describes the transformations made. 1014 1015 Multiple_Unit_Index : Int := 0; 1016 -- GNAT 1017 -- This is set non-zero if the current unit is being compiled in multiple 1018 -- unit per file mode, meaning that the current unit is selected from the 1019 -- sequence of units in the current source file, using the value stored 1020 -- in this variable (e.g. 2 = select second unit in file). A value of 1021 -- zero indicates that we are in normal (one unit per file) mode. 1022 1023 No_Backup : Boolean := False; 1024 -- GNATNAME 1025 -- Set by switch --no-backup. 1026 -- Do not create backup copies of project files. 1027 1028 No_Deletion : Boolean := False; 1029 -- GNATPREP 1030 -- Set by preprocessor switch -a. Do not eliminate any source text. Implies 1031 -- Undefined_Symbols_Are_False. Useful to perform a syntax check on all 1032 -- branches of #if constructs. 1033 1034 No_Main_Subprogram : Boolean := False; 1035 -- GNATMAKE, GNATBIND 1036 -- Set to True if compilation/binding of a program without main 1037 -- subprogram requested. 1038 1039 No_Run_Time_Mode : Boolean := False; 1040 -- GNAT, GNATBIND 1041 -- This flag is set True if a No_Run_Time pragma is encountered. See 1042 -- spec of Rtsfind for a full description of handling of this pragma. 1043 1044 No_Split_Units : Boolean := False; 1045 -- GPRBUILD 1046 -- Set to True with switch --no-split-units. When True, unit sources, spec, 1047 -- body and subunits, must all be in the same project.This is checked after 1048 -- each compilation. 1049 1050 No_Stdinc : Boolean := False; 1051 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF 1052 -- Set to True if no default source search dirs added to search list 1053 1054 No_Stdlib : Boolean := False; 1055 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF 1056 -- Set to True if no default library search dirs added to search list 1057 1058 No_Strict_Aliasing : Boolean := False; 1059 -- GNAT 1060 -- Set True if pragma No_Strict_Aliasing with no parameters encountered 1061 1062 Normalize_Scalars : Boolean := False; 1063 -- GNAT, GNATBIND 1064 -- Set True if a pragma Normalize_Scalars applies to the current unit. 1065 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 1066 1067 Object_Directory_Present : Boolean := False; 1068 -- GNATMAKE 1069 -- Set to True when an object directory is specified with option -D 1070 1071 Object_Path_File_Name : String_Ptr := null; 1072 -- GNAT2WHY 1073 -- Path of the temporary file that contains a list of object directories 1074 -- passed by -gnateO=<obj_path_file>. 1075 1076 One_Compilation_Per_Obj_Dir : Boolean := False; 1077 -- GNATMAKE, GPRBUILD 1078 -- Set to True with switch --single-compile-per-obj-dir. When True, there 1079 -- cannot be simultaneous compilations with the object files in the same 1080 -- object directory, if project files are used. 1081 1082 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code); 1083 pragma Ordered (Operating_Mode_Type); 1084 Operating_Mode : Operating_Mode_Type := Generate_Code; 1085 -- GNAT 1086 -- Indicates the operating mode of the compiler. The default is generate 1087 -- code, which runs the parser, semantics and backend. Switches can be 1088 -- used to set syntax checking only mode, or syntax and semantics checking 1089 -- only mode. Operating_Mode can also be modified as a result of detecting 1090 -- errors during the compilation process. In particular if any serious 1091 -- error is detected then this flag is reset from Generate_Code to 1092 -- Check_Semantics after generating an error message. This is an ordered 1093 -- type with the semantics that each value does more than the previous one. 1094 1095 Optimize_Alignment : Character := 'O'; 1096 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can 1097 -- be modified by use of pragma Optimize_Alignment. 1098 1099 Optimize_Alignment_Local : Boolean := False; 1100 -- Set True if Optimize_Alignment mode is set by a local configuration 1101 -- pragma that overrides the gnat.adc (or other configuration file) default 1102 -- so that the unit is not dependent on the default setting. Also always 1103 -- set True for internal units, since these always have a default setting 1104 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to 1105 -- them all having such an explicit pragma in each unit). 1106 1107 Original_Operating_Mode : Operating_Mode_Type := Generate_Code; 1108 -- GNAT 1109 -- Indicates the original operating mode of the compiler as set by compiler 1110 -- options. This is identical to Operating_Mode except that this is not 1111 -- affected by errors. 1112 1113 Optimization_Level : Int; 1114 pragma Import (C, Optimization_Level, "optimize"); 1115 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3) 1116 -- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and 1117 -- GNAAMP back ends. 1118 1119 Optimize_Size : Int; 1120 pragma Import (C, Optimize_Size, "optimize_size"); 1121 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero 1122 -- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c 1123 -- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends 1124 1125 Output_File_Name_Present : Boolean := False; 1126 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE 1127 -- Set to True when the output C file name is given with option -o for 1128 -- GNATBIND, when the object file name is given with option -gnatO for GNAT 1129 -- or when the executable is given with option -o for GNATMAKE or GPRMAKE. 1130 1131 Output_Linker_Option_List : Boolean := False; 1132 -- GNATBIND 1133 -- True if output of list of linker options is requested (-K switch set) 1134 1135 Output_ALI_List : Boolean := False; 1136 ALI_List_Filename : String_Ptr; 1137 -- GNATBIND 1138 -- True if output of list of ALIs is requested (-A switch set). List is 1139 -- output under the given filename, or standard output if not specified. 1140 1141 Output_Object_List : Boolean := False; 1142 Object_List_Filename : String_Ptr; 1143 -- GNATBIND 1144 -- True if output of list of objects is requested (-O switch set). List is 1145 -- output under the given filename, or standard output if not specified. 1146 1147 Partition_Elaboration_Policy : Character := ' '; 1148 -- GNAT, GNATBIND 1149 -- Set to ' ' for the default case (no elaboration policy specified). Reset 1150 -- to first character (uppercase) of locking policy name if a valid pragma 1151 -- Partition_Elaboration_Policy is encountered. 1152 1153 Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location; 1154 -- GNAT, GNATBIND 1155 -- Remember location of previous Partition_Elaboration_Policy pragma. This 1156 -- is used for inconsistency error messages. A value of System_Location is 1157 -- used if the policy is set in package System. 1158 1159 Persistent_BSS_Mode : Boolean := False; 1160 -- GNAT 1161 -- True if a Persistent_BSS configuration pragma is in effect, causing 1162 -- potentially persistent data to be placed in the persistent_bss section. 1163 1164 Pessimistic_Elab_Order : Boolean := False; 1165 -- GNATBIND 1166 -- True if pessimistic elaboration order is to be chosen (-p switch set) 1167 1168 Polling_Required : Boolean := False; 1169 -- GNAT 1170 -- Set to True if polling for asynchronous abort is enabled by using 1171 -- the -gnatP option for GNAT. 1172 1173 Preprocessing_Data_File : String_Ptr := null; 1174 -- GNAT 1175 -- Set by switch -gnatep=. The file name of the preprocessing data file. 1176 1177 Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4); 1178 -- An extensible array to temporarily stores symbol definitions specified 1179 -- on the command line with -gnateD switches. 1180 -- What is this magic constant 4 ??? 1181 -- What is extensible about this fixed length array ??? 1182 1183 Preprocessing_Symbol_Last : Natural := 0; 1184 -- Index of last symbol definition in array Symbol_Definitions 1185 1186 Print_Generated_Code : Boolean := False; 1187 -- GNAT 1188 -- Set to True to enable output of generated code in source form. This 1189 -- flag is set by the -gnatG switch. 1190 1191 Print_Standard : Boolean := False; 1192 -- GNAT 1193 -- Set to true to enable printing of package standard in source form. 1194 -- This flag is set by the -gnatS switch 1195 1196 type Usage is (Unknown, Not_In_Use, In_Use); 1197 Project_File_In_Use : Usage := Unknown; 1198 -- GNAT 1199 -- Indicates if a project file is used or not. Set to In_Use by the first 1200 -- SFNP pragma. 1201 1202 Queuing_Policy : Character := ' '; 1203 -- GNAT, GNATBIND 1204 -- Set to ' ' for the default case (no queuing policy specified). Reset to 1205 -- first character (uppercase) of locking policy name if a valid 1206 -- Queuing_Policy pragma is encountered. 1207 1208 Queuing_Policy_Sloc : Source_Ptr := No_Location; 1209 -- GNAT, GNATBIND 1210 -- Remember location of previous Queuing_Policy pragma. This is used for 1211 -- inconsistency error messages. A value of System_Location is used if the 1212 -- policy is set in package System. 1213 1214 Quiet_Output : Boolean := False; 1215 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN 1216 -- Set to True if the tool should not have any output if there are no 1217 -- errors or warnings. 1218 1219 Overriding_Renamings : Boolean := False; 1220 -- GNAT 1221 -- Set to True to enable compatibility mode with Rational compiler, and 1222 -- to accept renamings of implicit operations in their own scope. 1223 1224 Relaxed_RM_Semantics : Boolean := False; 1225 -- GNAT 1226 -- Set to True to ignore some Ada semantic error to help parse legacy 1227 -- Ada code for use in e.g. static analysis (such as CodePeer). This 1228 -- deals with cases where other compilers allow illegal constructs. Tools 1229 -- such as CodePeer are interested in analyzing code rather than enforcing 1230 -- legality rules, so as long as these illegal constructs end up with code 1231 -- that can be handled by the tool in question, there is no reason to 1232 -- reject the code that is considered correct by the other compiler. 1233 1234 Replace_In_Comments : Boolean := False; 1235 -- GNATPREP 1236 -- Set to True if -C switch used 1237 1238 RTS_Lib_Path_Name : String_Ptr := null; 1239 RTS_Src_Path_Name : String_Ptr := null; 1240 -- GNAT 1241 -- Set to the "adalib" and "adainclude" directories of the run time 1242 -- specified by --RTS=. 1243 1244 RTS_Switch : Boolean := False; 1245 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF 1246 -- Set to True when the --RTS switch is set 1247 1248 Run_Path_Option : Boolean := True; 1249 -- GNATMAKE, GNATLINK 1250 -- Set to False when no run_path_option should be issued to the linker 1251 1252 Search_Directory_Present : Boolean := False; 1253 -- GNAT 1254 -- Set to True when argument is -I. Reset to False when next argument, a 1255 -- search directory path is taken into account. Note that this is quite 1256 -- different from other switches in this section in that it is only set in 1257 -- a transitory manner as a result of scanning a -I switch with no file 1258 -- name, and if set, is an indication that the next argument is to be 1259 -- treated as a file name. 1260 1261 Sec_Stack_Used : Boolean := False; 1262 -- GNAT, GBATBIND 1263 -- Set True if generated code uses the System.Secondary_Stack package. For 1264 -- the binder, set if any unit uses the secondary stack package. 1265 1266 Setup_Projects : Boolean := False; 1267 -- GNAT DRIVER 1268 -- Set to True for GNAT SETUP: the Project Manager creates non existing 1269 -- object, library and exec directories. 1270 1271 Shared_Libgnat : Boolean; 1272 -- GNATBIND 1273 -- Set to True if a shared libgnat is requested by using the -shared option 1274 -- for GNATBIND and to False when using the -static option. The value of 1275 -- this flag is set by Gnatbind.Scan_Bind_Arg. 1276 1277 Short_Circuit_And_Or : Boolean := False; 1278 -- GNAT 1279 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit. 1280 1281 Short_Descriptors : Boolean := False; 1282 -- GNAT 1283 -- Set True if a pragma Short_Descriptors applies to the current unit. 1284 1285 type SPARK_Mode_Type is (None, Off, On); 1286 -- Possible legal modes that can be set by aspect/pragma SPARK_Mode, as 1287 -- well as the value None, which indicates no such pragma/aspect applies. 1288 1289 SPARK_Mode : SPARK_Mode_Type := None; 1290 -- GNAT 1291 -- Current SPARK mode setting 1292 1293 SPARK_Mode_Pragma : Node_Id := Empty; 1294 -- GNAT 1295 -- If the current SPARK_Mode (above) was set by a pragma, this records 1296 -- the pragma that set this mode. 1297 1298 SPARK_Switches_File_Name : String_Ptr := null; 1299 -- GNAT 1300 -- Set to non-null file name by use of the -gnates switch to specify 1301 -- SPARK (gnat2why) specific switches in the given file name. 1302 1303 Special_Exception_Package_Used : Boolean := False; 1304 -- GNAT 1305 -- Set to True if either of the unit GNAT.Most_Recent_Exception or 1306 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of 1307 -- local raise statements into gotos in the presence of either package. 1308 1309 Sprint_Line_Limit : Nat := 72; 1310 -- GNAT 1311 -- Limit values for chopping long lines in Cprint/Sprint output, can be 1312 -- reset by use of NNN parameter with -gnatG or -gnatD switches. 1313 1314 Stack_Checking_Enabled : Boolean := False; 1315 -- GNAT 1316 -- Set to indicate if stack checking is enabled for the compilation. This 1317 -- is set directly from the value in the gcc back end in the body of the 1318 -- gcc version of back_end.adb. 1319 1320 Style_Check : Boolean := False; 1321 -- GNAT 1322 -- Set True to perform style checks. Activates checks carried out in 1323 -- package Style (see body of this package for details of checks). This 1324 -- flag is set True by use of either the -gnatg or -gnaty switches, or 1325 -- by the Style_Check pragma. 1326 1327 Style_Check_Main : Boolean := False; 1328 -- GNAT 1329 -- Set True if Style_Check was set for the main unit. This is used to 1330 -- renable style checks for units in the mail extended source that get 1331 -- with'ed indirectly. It is set True by use of either the -gnatg or 1332 -- -gnaty switches, but not by use of the Style_Checks pragma. 1333 1334 Suppress_All_Inlining : Boolean := False; 1335 -- GNAT 1336 -- Set by -fno-inline. Suppresses all inlining, both front end and back end 1337 -- regardless of any other switches that are set. 1338 1339 Suppress_Control_Flow_Optimizations : Boolean := False; 1340 -- GNAT 1341 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations 1342 -- that interfere with coverage analysis based on the object code. 1343 1344 System_Extend_Pragma_Arg : Node_Id := Empty; 1345 -- GNAT 1346 -- Set non-empty if and only if a correct Extend_System pragma was present 1347 -- in which case it points to the argument of the pragma, and the name can 1348 -- be located as Chars (Expression (System_Extend_Pragma_Arg)). 1349 1350 System_Extend_Unit : Node_Id := Empty; 1351 -- GNAT 1352 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System 1353 -- is never appropriate in GNAT_Mode (and causes troubles, including 1354 -- bogus circularities, if we try to compile the run-time library with 1355 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit 1356 -- is a copy of the value set in System_Extend_Pragma_Arg. 1357 1358 Subunits_Missing : Boolean := False; 1359 -- GNAT 1360 -- This flag is set true if missing subunits are detected with code 1361 -- generation active. This causes code generation to be skipped. 1362 1363 Suppress_Checks : Boolean := False; 1364 -- GNAT 1365 -- Set to True if -gnatp (suppress all checks) switch present. 1366 1367 Suppress_Options : Suppress_Record; 1368 -- GNAT 1369 -- Indicates outer level setting of check suppression. This initializes 1370 -- the settings of the outer scope level in any unit compiled. This is 1371 -- initialized by Osint.Initialize, and further initialized by the 1372 -- Adjust_Global_Switches flag in Gnat1drv. 1373 1374 Suppress_Back_Annotation : Boolean := False; 1375 -- GNAT 1376 -- This flag is set True if back annotation of representation information 1377 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set. 1378 -- This avoids unnecessary time being spent on back annotation. 1379 1380 Table_Factor : Int := 1; 1381 -- GNAT 1382 -- Factor by which all initial table sizes set in Alloc are multiplied. 1383 -- Used in Table to calculate initial table sizes (the initial table size 1384 -- is the value in Alloc, used as the Table_Initial parameter value, 1385 -- multiplied by the factor given here. The default value is used if no 1386 -- -gnatT switch appears. 1387 1388 Tagged_Type_Expansion : Boolean := True; 1389 -- GNAT 1390 -- Set True if tagged types and interfaces should be expanded by the 1391 -- front-end. If False, the original tree is left unexpanded for tagged 1392 -- types and dispatching calls, assuming the underlying target supports 1393 -- it (e.g. in the JVM case). 1394 1395 Target_Dependent_Info_Read_Name : String_Ptr := null; 1396 -- GNAT 1397 -- Set non-null to override the normal processing in Get_Targ and set the 1398 -- necessary information by reading the target dependent information file 1399 -- whose name is given here (see packages Get_Targ and Set_Targ for full 1400 -- details). Set to non-null file name by use of the -gnateT switch. 1401 1402 Target_Dependent_Info_Write_Name : String_Ptr := null; 1403 -- GNAT 1404 -- Set non-null to enable a call to Set_Targ.Write_Target_Dependent_Info 1405 -- which writes a target independent information file (see packages 1406 -- Get_Targ and Set_Targ for full details) using the name given by 1407 -- this switch. Set to non-null file name by use of the -gnatet switch. 1408 1409 Task_Dispatching_Policy : Character := ' '; 1410 -- GNAT, GNATBIND 1411 -- Set to ' ' for the default case (no task dispatching policy specified). 1412 -- Reset to first character (uppercase) of task dispatching policy name 1413 -- if a valid Task_Dispatching_Policy pragma is encountered. 1414 1415 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location; 1416 -- GNAT, GNATBIND 1417 -- Remember location of previous Task_Dispatching_Policy pragma. This is 1418 -- used for inconsistency error messages. A value of System_Location is 1419 -- used if the policy is set in package System. 1420 1421 Tasking_Used : Boolean := False; 1422 -- Set True if any tasking construct is encountered. Used to activate the 1423 -- output of the Q, L and T lines in ALI files. 1424 1425 Time_Slice_Set : Boolean := False; 1426 -- GNATBIND 1427 -- Set True if a pragma Time_Slice is processed in the main unit, or 1428 -- if the -gnatTnn switch is present to set a time slice value. 1429 1430 Time_Slice_Value : Nat; 1431 -- GNATBIND 1432 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if 1433 -- Time_Slice pragma has been processed. Set to the time slice value in 1434 -- microseconds. Negative values are stored as zero, and the value is not 1435 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are 1436 -- reset to this maximum. This can also be set with the -gnatTnn switch. 1437 1438 Tolerate_Consistency_Errors : Boolean := False; 1439 -- GNATBIND 1440 -- Tolerate time stamp and other consistency errors. If this flag is set to 1441 -- True (-t), then inconsistencies result in warnings rather than errors. 1442 1443 Treat_Categorization_Errors_As_Warnings : Boolean := False; 1444 -- Normally categorization errors are true illegalities. If this switch 1445 -- is set, then such errors result in warning messages rather than error 1446 -- messages. Set True by -gnateP (P for Pure/Preelaborate). Also set in 1447 -- Relaxed_RM_Semantics mode since some old Ada 83 compilers treated 1448 -- pragma Preelaborate differently. 1449 1450 Treat_Restrictions_As_Warnings : Boolean := False; 1451 -- GNAT 1452 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by 1453 -- -gnatr switch. 1454 1455 Tree_Output : Boolean := False; 1456 -- GNAT 1457 -- Set to True (-gnatt) to generate output tree file 1458 1459 True_VMS_Target : Boolean := False; 1460 -- Set True if we are on a VMS target. The setting of this flag reflects 1461 -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which 1462 -- can also be true when debug flag m is set (-gnatdm). This is used in the 1463 -- few cases where we do NOT want -gnatdm to trigger the VMS behavior. 1464 1465 Try_Semantics : Boolean := False; 1466 -- GNAT 1467 -- Flag set to force attempt at semantic analysis, even if parser errors 1468 -- occur. This will probably cause blowups at this stage in the game. On 1469 -- the other hand, most such blowups will be caught cleanly and simply 1470 -- say compilation abandoned. This flag is set True by -gnatq or -gnatQ. 1471 1472 Unchecked_Shared_Lib_Imports : Boolean := False; 1473 -- GPRBUILD 1474 -- Set to True when shared library projects are allowed to import projects 1475 -- that are not shared library projects. Set on by use of the switch 1476 -- --unchecked-shared-lib-imports. 1477 1478 Undefined_Symbols_Are_False : Boolean := False; 1479 -- GNAT, GNATPREP 1480 -- Set to True by switch -u of gnatprep or -u in the preprocessing data 1481 -- file for the compiler. Indicates that while preprocessing sources, 1482 -- symbols that are not defined have the value FALSE. 1483 1484 Unique_Error_Tag : Boolean := Tag_Errors; 1485 -- GNAT 1486 -- Indicates if error messages are to be prefixed by the string error: 1487 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch. 1488 1489 Universal_Addressing_On_AAMP : Boolean := False; 1490 -- GNAAMP 1491 -- Indicates if library-level objects should be accessed and updated using 1492 -- universal addressing instructions on the AAMP architecture. This flag is 1493 -- set to True when pragma Universal_Data is given as a configuration 1494 -- pragma. 1495 1496 Unreserve_All_Interrupts : Boolean := False; 1497 -- GNAT, GNATBIND 1498 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma 1499 -- appears anywhere in the main unit for GNAT, or if any ALI file has the 1500 -- corresponding attribute set in GNATBIND. 1501 1502 Upper_Half_Encoding : Boolean := False; 1503 -- GNAT, GNATBIND 1504 -- Normally set False, indicating that upper half ISO 8859-1 characters are 1505 -- used in the normal way to represent themselves. If the wide character 1506 -- encoding method uses the upper bit for this encoding, then this flag is 1507 -- set True, and upper half characters in the source indicate the start of 1508 -- a wide character sequence. Set by -gnatW or -W switches. 1509 1510 Use_Include_Path_File : Boolean := False; 1511 -- GNATMAKE, GPRBUILD 1512 -- When True, create a source search path file, even when a mapping file 1513 -- is used. 1514 1515 Usage_Requested : Boolean := False; 1516 -- GNAT, GNATBIND, GNATMAKE 1517 -- Set to True if -h (-gnath for the compiler) switch encountered 1518 -- requesting usage information 1519 1520 Use_Pragma_Linker_Constructor : Boolean := False; 1521 -- GNATBIND 1522 -- True if pragma Linker_Constructor applies to adainit 1523 1524 Use_VADS_Size : Boolean := False; 1525 -- GNAT 1526 -- Set to True if a valid pragma Use_VADS_Size is processed 1527 1528 Validity_Checks_On : Boolean := True; 1529 -- GNAT 1530 -- This flag determines if validity checking is on or off. The initial 1531 -- state is on, and the required default validity checks are active. The 1532 -- actual set of checks that is performed if Validity_Checks_On is set is 1533 -- defined by the switches in package Validsw. The Validity_Checks_On flag 1534 -- is controlled by pragma Validity_Checks (On | Off), and also some 1535 -- generated compiler code (typically code that has to do with validity 1536 -- check generation) is compiled with this flag set to False. This flag is 1537 -- set to False by the -gnatp switch. 1538 1539 Verbose_Mode : Boolean := False; 1540 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN, 1541 -- GPRMAKE, GPRBUILD, GPRCLEAN 1542 -- Set to True to get verbose mode (full error message text and location 1543 -- information sent to standard output, also header, copyright and summary) 1544 1545 type Verbosity_Level_Type is (None, Low, Medium, High); 1546 pragma Ordered (Verbosity_Level_Type); 1547 Verbosity_Level : Verbosity_Level_Type := High; 1548 -- GNATMAKE, GPRMAKE 1549 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates 1550 -- the level of verbosity of informational messages: 1551 -- 1552 -- In Low Verbosity, the reasons why a source is recompiled, the name 1553 -- of the executable and the reason it must be rebuilt is output. 1554 -- 1555 -- In Medium Verbosity, additional lines are output for each ALI file 1556 -- that is checked. 1557 -- 1558 -- In High Verbosity, additional lines are output when the ALI file 1559 -- is part of an Ada library, is read-only or is part of the runtime. 1560 1561 Warn_On_Ada_2005_Compatibility : Boolean := True; 1562 -- GNAT 1563 -- Set to True to generate all warnings on Ada 2005 compatibility issues, 1564 -- including warnings on Ada 2005 obsolescent features used in Ada 2005 1565 -- mode. Set by default, modified by use of -gnatwy/Y. 1566 1567 Warn_On_Ada_2012_Compatibility : Boolean := True; 1568 -- GNAT 1569 -- Set to True to generate all warnings on Ada 2012 compatibility issues, 1570 -- including warnings on Ada 2012 obsolescent features used in Ada 2012 1571 -- mode. Modified by use of -gnatwy/Y. 1572 1573 Warn_On_All_Unread_Out_Parameters : Boolean := False; 1574 -- GNAT 1575 -- Set to True to generate warnings in all cases where a variable is 1576 -- modified by being passed as to an OUT formal, but the resulting value is 1577 -- never read. The default is that this warning is suppressed. Modified 1578 -- by use of gnatw.o/.O. 1579 1580 Warn_On_Assertion_Failure : Boolean := True; 1581 -- GNAT 1582 -- Set to True to activate warnings on assertions that can be determined 1583 -- at compile time will always fail. Modified by use of -gnatw.a/.A. 1584 1585 Warn_On_Assumed_Low_Bound : Boolean := True; 1586 -- GNAT 1587 -- Set to True to activate warnings for string parameters that are indexed 1588 -- with literals or S'Length, presumably assuming a lower bound of one. 1589 -- Modified by use of -gnatww/W. 1590 1591 Warn_On_Atomic_Synchronization : Boolean := False; 1592 -- GNAT 1593 -- Set to True to generate information messages for atomic synchronization. 1594 -- Modified by use of -gnatw.n/.N. 1595 1596 Warn_On_Bad_Fixed_Value : Boolean := False; 1597 -- GNAT 1598 -- Set to True to generate warnings for static fixed-point expression 1599 -- values that are not an exact multiple of the small value of the type. 1600 -- Odd by default, modified by use of -gnatwb/B. 1601 1602 Warn_On_Biased_Representation : Boolean := True; 1603 -- GNAT 1604 -- Set to True to generate warnings for size clauses, component clauses 1605 -- and component_size clauses that force biased representation. Modified 1606 -- by use of -gnatw.b/.B. 1607 1608 Warn_On_Constant : Boolean := False; 1609 -- GNAT 1610 -- Set to True to generate warnings for variables that could be declared 1611 -- as constants. Modified by use of -gnatwk/K. 1612 1613 Warn_On_Deleted_Code : Boolean := False; 1614 -- GNAT 1615 -- Set to True to generate warnings for code deleted by the front end 1616 -- for conditional statements whose outcome is known at compile time. 1617 -- Modified by use of -gnatwt/T. 1618 1619 Warn_On_Dereference : Boolean := False; 1620 -- GNAT 1621 -- Set to True to generate warnings for implicit dereferences for array 1622 -- indexing and record component access. Modified by use of -gnatwd/D. 1623 1624 Warn_On_Export_Import : Boolean := True; 1625 -- GNAT 1626 -- Set to True to generate warnings for suspicious use of export or 1627 -- import pragmas. Modified by use of -gnatwx/X. 1628 1629 Warn_On_Hiding : Boolean := False; 1630 -- GNAT 1631 -- Set to True to generate warnings if a declared entity hides another 1632 -- entity. The default is that this warning is suppressed. Modified by 1633 -- use of -gnatwh/H. 1634 1635 Warn_On_Modified_Unread : Boolean := False; 1636 -- GNAT 1637 -- Set to True to generate warnings if a variable is assigned but is never 1638 -- read. Also controls warnings for similar cases involving out parameters, 1639 -- but only if there is only one out parameter for the procedure involved. 1640 -- The default is that this warning is suppressed, modified by use of 1641 -- -gnatwm/M. 1642 1643 Warn_On_No_Value_Assigned : Boolean := True; 1644 -- GNAT 1645 -- Set to True to generate warnings if no value is ever assigned to a 1646 -- variable that is at least partially uninitialized. Set to false to 1647 -- suppress such warnings. The default is that such warnings are enabled. 1648 -- Modified by use of -gnatwv/V. 1649 1650 Warn_On_Non_Local_Exception : Boolean := False; 1651 -- GNAT 1652 -- Set to True to generate warnings for non-local exception raises and also 1653 -- handlers that can never handle a local raise. This warning is only ever 1654 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The 1655 -- default is not to generate the warnings except that if the source has 1656 -- at least one exception handler, and this restriction is set, and the 1657 -- warning was not explicitly turned off, then it is turned on by default. 1658 -- Modified by use of -gnatw.x/.X. 1659 1660 No_Warn_On_Non_Local_Exception : Boolean := False; 1661 -- GNAT 1662 -- This is set to True if the above warning is explicitly suppressed. We 1663 -- use this to avoid turning it on by default when No_Exception_Propagation 1664 -- restriction is set and an exception handler is present. 1665 1666 Warn_On_Object_Renames_Function : Boolean := False; 1667 -- GNAT 1668 -- Set to True to generate warnings when a function result is renamed as 1669 -- an object. The default is that this warning is disabled. Modified by 1670 -- use of -gnatw.r/.R. 1671 1672 Warn_On_Obsolescent_Feature : Boolean := False; 1673 -- GNAT 1674 -- Set to True to generate warnings on use of any feature in Annex or if a 1675 -- subprogram is called for which a pragma Obsolescent applies. Modified 1676 -- by use of -gnatwj/J. 1677 1678 Warn_On_Overlap : Boolean := False; 1679 -- GNAT 1680 -- Set to True to generate warnings when a writable actual overlaps with 1681 -- another actual in a subprogram call. This applies only in modes before 1682 -- Ada 2012. Starting with Ada 2012, such overlaps are illegal. 1683 -- Modified by use of -gnatw.i/.I. 1684 1685 Warn_On_Questionable_Missing_Parens : Boolean := True; 1686 -- GNAT 1687 -- Set to True to generate warnings for cases where parentheses are missing 1688 -- and the usage is questionable, because the intent is unclear. On by 1689 -- default, modified by use of -gnatwq/Q. 1690 1691 Warn_On_Parameter_Order : Boolean := False; 1692 -- GNAT 1693 -- Set to True to generate warnings for cases where the argument list for 1694 -- a call is a sequence of identifiers that match the formal identifiers, 1695 -- but are in the wrong order. 1696 1697 Warn_On_Redundant_Constructs : Boolean := False; 1698 -- GNAT 1699 -- Set to True to generate warnings for redundant constructs (e.g. useless 1700 -- assignments/conversions). The default is that this warning is disabled. 1701 -- Modified by use of -gnatwr/R. 1702 1703 Warn_On_Reverse_Bit_Order : Boolean := True; 1704 -- GNAT 1705 -- Set to True to generate warning (informational) messages for component 1706 -- clauses that are affected by non-standard bit-order. The default is 1707 -- that this warning is enabled. Modified by -gnatw.v/.V. 1708 1709 Warn_On_Suspicious_Contract : Boolean := True; 1710 -- GNAT 1711 -- Set to True to generate warnings for suspicious contracts expressed as 1712 -- pragmas or aspects precondition and postcondition. The default is that 1713 -- this warning is enabled. Modified by use of -gnatw.t/.T. 1714 1715 Warn_On_Suspicious_Modulus_Value : Boolean := True; 1716 -- GNAT 1717 -- Set to True to generate warnings for suspicious modulus values. The 1718 -- default is that this warning is enabled. Modified by -gnatw.m/.M. 1719 1720 Warn_On_Unchecked_Conversion : Boolean := True; 1721 -- GNAT 1722 -- Set to True to generate warnings for unchecked conversions that may have 1723 -- non-portable semantics (e.g. because sizes of types differ). Modified 1724 -- by use of -gnatwz/Z. 1725 1726 Warn_On_Unordered_Enumeration_Type : Boolean := False; 1727 -- GNAT 1728 -- Set to True to generate warnings for inappropriate uses (comparisons 1729 -- and explicit ranges) on unordered enumeration types (which includes 1730 -- all enumeration types for which pragma Ordered is not given). The 1731 -- default is that this warning is disabled. Modified by -gnat.u/.U. 1732 1733 Warn_On_Unrecognized_Pragma : Boolean := True; 1734 -- GNAT 1735 -- Set to True to generate warnings for unrecognized pragmas. The default 1736 -- is that this warning is enabled. Modified by use of -gnatwg/G. 1737 1738 Warn_On_Unrepped_Components : Boolean := False; 1739 -- GNAT 1740 -- Set to True to generate warnings for the case of components of record 1741 -- which have a record representation clause but this component does not 1742 -- have a component clause. Modified by use of -gnatw.c/.C. 1743 1744 Warn_On_Warnings_Off : Boolean := False; 1745 -- GNAT 1746 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent), 1747 -- where either the pragma is never used, or it could be replaced by a 1748 -- pragma Unmodified or Unreferenced. Also generates warnings for pragma 1749 -- Warning (Off, string) which either has no matching pragma Warning On, 1750 -- or where no warning has been suppressed by the use of the pragma. 1751 -- Modified by use of -gnatw.w/.W. 1752 1753 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error); 1754 Warning_Mode : Warning_Mode_Type := Normal; 1755 -- GNAT, GNATBIND 1756 -- Controls treatment of warning messages. If set to Suppress, warning 1757 -- messages are not generated at all. In Normal mode, they are generated 1758 -- but do not count as errors. In Treat_As_Error mode, warning messages are 1759 -- generated and are treated as errors. Note that Warning_Mode = Suppress 1760 -- causes pragma Warnings to be ignored (except for legality checks), 1761 -- unless we are in GNATprove_Mode, which requires pragma Warnings to 1762 -- be stored for the formal verification backend. 1763 1764 Warnings_As_Errors_Count : Natural; 1765 -- GNAT 1766 -- Number of entries stored in Warnings_As_Errors table 1767 1768 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets; 1769 -- GNAT, GNATBIND 1770 -- Method used for encoding wide characters in the source program. See 1771 -- description of type in unit System.WCh_Con for a list of the methods 1772 -- that are currently supported. Note that brackets notation is always 1773 -- recognized in source programs regardless of the setting of this 1774 -- variable. The default setting causes only the brackets notation to be 1775 -- recognized. If this is the main unit, this setting also controls the 1776 -- output of the W=? parameter in the ALI file, which is used to provide 1777 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder, 1778 -- the value set here overrides this main unit default. 1779 1780 Wide_Character_Encoding_Method_Specified : Boolean := False; 1781 -- GNAT, GNATBIND 1782 -- Set True if the value in Wide_Character_Encoding_Method was set as 1783 -- a result of an explicit -gnatW? or -W? switch. False otherwise. 1784 1785 Xref_Active : Boolean := True; 1786 -- GNAT 1787 -- Set if cross-referencing is enabled (i.e. xref info in ALI files) 1788 1789 Zero_Formatting : Boolean := False; 1790 -- GNATBIND 1791 -- Do no formatting (no title, no leading spaces, no empty lines) in 1792 -- auxiliary outputs (-e, -K, -l, -R). 1793 1794 ---------------------------- 1795 -- Configuration Settings -- 1796 ---------------------------- 1797 1798 -- These are settings that are used to establish the mode at the start of 1799 -- each unit. The values defined below can be affected either by command 1800 -- line switches, or by the use of appropriate configuration pragmas in a 1801 -- configuration pragma file. 1802 1803 Ada_Version_Config : Ada_Version_Type; 1804 -- GNAT 1805 -- This is the value of the configuration switch for the Ada 83 mode, as 1806 -- set by the command line switches -gnat83/95/2005/2012, and possibly 1807 -- modified by the use of configuration pragmas Ada_*. This switch is used 1808 -- to set the initial value for Ada_Version mode at the start of analysis 1809 -- of a unit. Note however that the setting of this flag is ignored for 1810 -- internal and predefined units (which are always compiled in the most up 1811 -- to date version of Ada). 1812 1813 Ada_Version_Pragma_Config : Node_Id; 1814 -- This will be set non empty if it is set by a configuration pragma 1815 1816 Ada_Version_Explicit_Config : Ada_Version_Type; 1817 -- GNAT 1818 -- This is set in the same manner as Ada_Version_Config. The difference is 1819 -- that the setting of this flag is not ignored for internal and predefined 1820 -- units, which for some purposes do indeed access this value, regardless 1821 -- of the fact that they are compiled the most up to date ada version). 1822 1823 Assertions_Enabled_Config : Boolean; 1824 -- GNAT 1825 -- This is the value of the configuration switch for assertions enabled 1826 -- mode, as possibly set by the command line switch -gnata, and possibly 1827 -- modified by the use of the configuration pragma Assertion_Policy. 1828 1829 Assume_No_Invalid_Values_Config : Boolean; 1830 -- GNAT 1831 -- This is the value of the configuration switch for assuming "no invalid 1832 -- values enabled" mode, as possibly set by the command line switch 1833 -- -gnatB, and possibly modified by the use of the configuration pragma 1834 -- Assume_No_Invalid_Values. 1835 1836 Check_Float_Overflow_Config : Boolean; 1837 -- GNAT 1838 -- Set to True to check that operations on predefined unconstrained float 1839 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 1840 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 1841 -- of the -gnateF switch. 1842 1843 Check_Policy_List_Config : Node_Id; 1844 -- GNAT 1845 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 1846 -- that are linked through the Next_Pragma fields, with the list being 1847 -- terminated by Empty. The order is most recently processed first. This 1848 -- list includes only those pragmas in configuration pragma files. 1849 1850 Default_Pool_Config : Node_Id := Empty; 1851 -- GNAT 1852 -- Same as Default_Pool above, except this is only for Default_Storage_Pool 1853 -- pragmas that are configuration pragmas. 1854 1855 Dynamic_Elaboration_Checks_Config : Boolean := False; 1856 -- GNAT 1857 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 1858 -- switch or by the use of pragma Elaboration_Checking (Dynamic). 1859 1860 Exception_Locations_Suppressed_Config : Boolean := False; 1861 -- GNAT 1862 -- Set True by use of the configuration pragma Suppress_Exception_Messages 1863 1864 Extensions_Allowed_Config : Boolean; 1865 -- GNAT 1866 -- This is the flag that indicates whether extensions are allowed. It can 1867 -- be set True either by use of the -gnatX switch, or by use of the 1868 -- configuration pragma Extensions_Allowed (On). It is always set to True 1869 -- for internal GNAT units, since extensions are always permitted in such 1870 -- units. 1871 1872 External_Name_Exp_Casing_Config : External_Casing_Type; 1873 -- GNAT 1874 -- This is the value of the configuration switch that controls casing of 1875 -- external symbols for which an explicit external name is given. It can be 1876 -- set to Uppercase by the command line switch -gnatF, and further modified 1877 -- by the use of the configuration pragma External_Name_Casing in the 1878 -- gnat.adc file. This flag is used to set the initial value for 1879 -- External_Name_Exp_Casing at the start of analyzing each unit. Note 1880 -- however that the setting of this flag is ignored for internal and 1881 -- predefined units (which are always compiled with As_Is mode). 1882 1883 External_Name_Imp_Casing_Config : External_Casing_Type; 1884 -- GNAT 1885 -- This is the value of the configuration switch that controls casing of 1886 -- external symbols where the external name is implicitly given. It can be 1887 -- set to Uppercase by the command line switch -gnatF, and further modified 1888 -- by the use of the configuration pragma External_Name_Casing in the 1889 -- gnat.adc file. This flag is used to set the initial value for 1890 -- External_Name_Imp_Casing at the start of analyzing each unit. Note 1891 -- however that the setting of this flag is ignored for internal and 1892 -- predefined units (which are always compiled with Lowercase mode). 1893 1894 Fast_Math_Config : Boolean; 1895 -- GNAT 1896 -- This is the value of the configuration switch that controls Fast_Math 1897 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is 1898 -- used to set the initial value of Fast_Math at the start of each new 1899 -- compilation unit. 1900 1901 Initialize_Scalars_Config : Boolean; 1902 -- GNAT 1903 -- This is the value of the configuration switch that is set by the 1904 -- pragma Initialize_Scalars when it appears in the gnat.adc file. 1905 -- This switch is not set when the pragma appears ahead of a given 1906 -- unit, so it does not affect the compilation of other units. 1907 1908 Optimize_Alignment_Config : Character; 1909 -- GNAT 1910 -- This is the value of the configuration switch that controls the 1911 -- alignment optimization mode, as set by an Optimize_Alignment pragma. 1912 -- It is used to set the initial value of Optimize_Alignment at the start 1913 -- of each new compilation unit, except that it is always set to 'O' (off) 1914 -- for internal units. 1915 1916 Persistent_BSS_Mode_Config : Boolean; 1917 -- GNAT 1918 -- This is the value of the configuration switch that controls whether 1919 -- potentially persistent data is to be placed in the persistent_bss 1920 -- section. It can be set True by use of the pragma Persistent_BSS. 1921 -- This flag is used to set the initial value of Persistent_BSS_Mode 1922 -- at the start of each compilation unit, except that it is always 1923 -- set False for predefined units. 1924 1925 Polling_Required_Config : Boolean; 1926 -- GNAT 1927 -- This is the value of the configuration switch that controls polling 1928 -- mode. It can be set True by the command line switch -gnatP, and then 1929 -- further modified by the use of pragma Polling in the gnat.adc file. This 1930 -- flag is used to set the initial value for Polling_Required at the start 1931 -- of analyzing each unit. 1932 1933 Short_Descriptors_Config : Boolean; 1934 -- GNAT 1935 -- This is the value of the configuration switch that controls the use of 1936 -- Short_Descriptors for setting descriptor default sizes. It can be set 1937 -- True by the use of the pragma Short_Descriptors in the gnat.adc file. 1938 -- This flag is used to set the initial value for Short_Descriptors at the 1939 -- start of analyzing each unit. 1940 1941 SPARK_Mode_Config : SPARK_Mode_Type := None; 1942 -- GNAT 1943 -- The setting of SPARK_Mode from configuration pragmas 1944 1945 SPARK_Mode_Pragma_Config : Node_Id := Empty; 1946 -- If a SPARK_Mode pragma appeared in the configuration pragmas (setting 1947 -- SPARK_Mode_Config appropriately), then this points to the N_Pragma node. 1948 1949 Use_VADS_Size_Config : Boolean; 1950 -- GNAT 1951 -- This is the value of the configuration switch that controls the use of 1952 -- VADS_Size instead of Size wherever the attribute Size is used. It can 1953 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file. 1954 -- This flag is used to set the initial value for Use_VADS_Size at the 1955 -- start of analyzing each unit. Note however that the setting of this flag 1956 -- is ignored for internal and predefined units (which are always compiled 1957 -- with the standard Size semantics). 1958 1959 Warnings_As_Errors_Count_Config : Natural; 1960 -- GNAT 1961 -- Count of pattern strings stored from Warning_As_Error pragmas 1962 1963 type Config_Switches_Type is private; 1964 -- Type used to save values of the switches set from Config values 1965 1966 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type); 1967 -- This procedure saves the current values of the switches which are 1968 -- initialized from the above Config values, and then resets these switches 1969 -- according to the Config value settings. 1970 1971 procedure Set_Opt_Config_Switches 1972 (Internal_Unit : Boolean; 1973 Main_Unit : Boolean); 1974 -- This procedure sets the switches to the appropriate initial values. The 1975 -- parameter Internal_Unit is True for an internal or predefined unit, and 1976 -- affects the way the switches are set (see above). Main_Unit is true if 1977 -- switches are being set for the main unit or for the spec of the main 1978 -- unit. This affects setting of the assert/debug pragma switches, which 1979 -- are normally set false by default for an internal unit, except when the 1980 -- internal unit is the main unit, in which case we use the command line 1981 -- settings). 1982 1983 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type); 1984 -- This procedure restores a set of switch values previously saved by a 1985 -- call to Save_Opt_Config_Switches (Save). 1986 1987 procedure Register_Opt_Config_Switches; 1988 -- This procedure is called after processing the gnat.adc file and other 1989 -- configuration pragma files to record the values of the Config switches, 1990 -- as possibly modified by the use of command line switches and pragmas 1991 -- appearing in these files. 1992 1993 ------------------------ 1994 -- Other Global Flags -- 1995 ------------------------ 1996 1997 Expander_Active : Boolean := False; 1998 -- A flag that indicates if expansion is active (True) or deactivated 1999 -- (False). When expansion is deactivated all calls to expander routines 2000 -- have no effect. Note that the initial setting of False is merely to 2001 -- prevent saving of an undefined value for an initial call to the 2002 -- Expander_Mode_Save_And_Set procedure. For more information on the use of 2003 -- this flag, see package Expander. Indeed this flag might more logically 2004 -- be in the spec of Expander, but it is referenced by Errout, and it 2005 -- really seems wrong for Errout to depend on Expander. 2006 2007 Static_Dispatch_Tables : Boolean := True; 2008 -- This flag indicates if the backend supports generation of statically 2009 -- allocated dispatch tables. If it is True, then the front end will 2010 -- generate static aggregates for dispatch tables that contain forward 2011 -- references to addresses of subprograms not seen yet, and the back end 2012 -- must be prepared to handle this case. If it is False, then the front 2013 -- end generates assignments to initialize the dispatch table, and there 2014 -- are no such forward references. By default we build statically allocated 2015 -- dispatch tables for all library level tagged types in all platforms.This 2016 -- behavior can be disabled using switch -gnatd.t which will set this flag 2017 -- to False and revert to the previous dynamic behavior. 2018 2019 ----------------------- 2020 -- Tree I/O Routines -- 2021 ----------------------- 2022 2023 procedure Tree_Read; 2024 -- Reads switch settings from current tree file using Tree_Read 2025 2026 procedure Tree_Write; 2027 -- Writes out switch settings to current tree file using Tree_Write 2028 2029 -------------------------- 2030 -- ASIS Version Control -- 2031 -------------------------- 2032 2033 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number) 2034 -- are supposed to be used in the GNAT/ASIS version check performed in 2035 -- the ASIS code (this package is also a part of the ASIS implementation). 2036 -- They are set by Tree_Read procedure, so they represent the version 2037 -- number (and the version string) of the compiler which has created the 2038 -- tree, and they are supposed to be compared with the corresponding values 2039 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS 2040 -- implementation. 2041 2042 Tree_Version_String : String_Access; 2043 -- Used to store the compiler version string read from a tree file to check 2044 -- if it is from the same date as stored in the version string in Gnatvsn. 2045 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow 2046 -- non-Pro ASIS and ASIS-based tools to be used with any version of the 2047 -- GNAT compiler. Therefore, we need the possibility to compare the dates 2048 -- of the corresponding source sets, using version strings that may be 2049 -- of different lengths. 2050 2051 Tree_ASIS_Version_Number : Int; 2052 -- Used to store the ASIS version number read from a tree file to check if 2053 -- it is the same as stored in the ASIS version number in Tree_IO. 2054 2055 ----------------------------------- 2056 -- Modes for Formal Verification -- 2057 ----------------------------------- 2058 2059 GNATprove_Mode : Boolean := False; 2060 -- Specific compiling mode targeting formal verification for those parts 2061 -- of the input code that belong to the SPARK 2014 subset of Ada. Set True 2062 -- by the gnat2why executable or by use of the -gnatd.F debug switch. Note 2063 -- that this is completely separate from the SPARK restriction defined in 2064 -- GNAT to detect violations of a subset of SPARK 2005 rules. 2065 2066 --------------------------- 2067 -- Error/Warning Control -- 2068 --------------------------- 2069 2070 -- The following array would more reasonably be located in Err_Vars or 2071 -- Errour, but but we put them here to deal with licensing issues (we need 2072 -- this to have the GPL exception licensing, since these variables and 2073 -- subprograms are accessed from units with this licensing). 2074 2075 Warnings_As_Errors : array (1 .. 10_000) of String_Ptr; 2076 -- Table for recording Warning_As_Error pragmas as they are processed. 2077 -- It would be nicer to use Table, but there are circular elaboration 2078 -- problems if we try to do this, and an attempt to find some other 2079 -- appropriately licensed unit to declare this as a Table failed with 2080 -- various elaboration circularities. Memory is getting cheap these days! 2081 2082 -------------------------- 2083 -- Private Declarations -- 2084 -------------------------- 2085 2086private 2087 2088 -- The following type is used to save and restore settings of switches in 2089 -- Opt that represent the configuration (i.e. result of config pragmas). 2090 2091 -- Note that Ada_Version_Explicit is not included, since this is a sticky 2092 -- flag that once set does not get reset, since the whole idea of this flag 2093 -- is to record the setting for the main unit. 2094 2095 type Config_Switches_Type is record 2096 Ada_Version : Ada_Version_Type; 2097 Ada_Version_Explicit : Ada_Version_Type; 2098 Ada_Version_Pragma : Node_Id; 2099 Assertions_Enabled : Boolean; 2100 Assume_No_Invalid_Values : Boolean; 2101 Check_Float_Overflow : Boolean; 2102 Check_Policy_List : Node_Id; 2103 Default_Pool : Node_Id; 2104 Dynamic_Elaboration_Checks : Boolean; 2105 Exception_Locations_Suppressed : Boolean; 2106 Extensions_Allowed : Boolean; 2107 External_Name_Exp_Casing : External_Casing_Type; 2108 External_Name_Imp_Casing : External_Casing_Type; 2109 Fast_Math : Boolean; 2110 Initialize_Scalars : Boolean; 2111 Normalize_Scalars : Boolean; 2112 Optimize_Alignment : Character; 2113 Optimize_Alignment_Local : Boolean; 2114 Persistent_BSS_Mode : Boolean; 2115 Polling_Required : Boolean; 2116 Short_Descriptors : Boolean; 2117 SPARK_Mode : SPARK_Mode_Type; 2118 SPARK_Mode_Pragma : Node_Id; 2119 Use_VADS_Size : Boolean; 2120 Warnings_As_Errors_Count : Natural; 2121 end record; 2122 2123 -- The following declarations are for GCC version dependent flags. We do 2124 -- not let client code in the compiler test GCC_Version directly, but 2125 -- instead use deferred constants for relevant feature tags. 2126 2127 -- Note: there currently are no such constants defined in this section, 2128 -- since the compiler front end is currently entirely independent of the 2129 -- GCC version, which is a desirable state of affairs. 2130 2131 function get_gcc_version return Int; 2132 pragma Import (C, get_gcc_version, "get_gcc_version"); 2133 2134 GCC_Version : constant Nat := get_gcc_version; 2135 -- GNATMAKE 2136 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that 2137 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported. 2138 2139end Opt; 2140