1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- O P T -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2015, 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, 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 or 141 -- internal units, so it reflects the Ada version explicitly set using 142 -- configuration pragmas or compiler switches (or if neither appears, it 143 -- remains set to Ada_Version_Default). This is used in the rare cases 144 -- (notably pragma Obsolescent) where we want the explicit version set. 145 146 Ada_Version_Runtime : Ada_Version_Type := Ada_2012; 147 -- GNAT 148 -- Ada version used to compile the runtime. Used to set Ada_Version (but 149 -- not Ada_Version_Explicit) when compiling predefined or internal units. 150 151 Ada_Final_Suffix : constant String := "final"; 152 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix); 153 -- GNATBIND 154 -- The name of the procedure that performs the finalization at the end of 155 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 156 157 Ada_Init_Suffix : constant String := "init"; 158 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix); 159 -- GNATBIND 160 -- The name of the procedure that performs initialization at the start 161 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 162 163 Ada_Main_Name_Suffix : constant String := "main"; 164 -- GNATBIND 165 -- The suffix for Ada_Main_Name. Defined as a constant here so that it 166 -- can be referenced in a uniform manner to create either the default 167 -- value of Ada_Main_Name (declared below), or the non-default name 168 -- set by Gnatbind.Scan_Bind_Arg. 169 170 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix); 171 -- GNATBIND 172 -- The name of the Ada package generated by the binder (when in Ada mode). 173 -- This variable may be modified by Gnatbind.Scan_Bind_Arg. 174 175 Address_Clause_Overlay_Warnings : Boolean := True; 176 -- GNAT 177 -- Set False to disable address clause warnings. Modified by use of 178 -- -gnatwo/O. 179 180 Address_Is_Private : Boolean := False; 181 -- GNAT, GNATBIND 182 -- Set True if package System has the line "type Address is private;" 183 184 All_Errors_Mode : Boolean := False; 185 -- GNAT 186 -- Flag set to force display of multiple errors on a single line and 187 -- also repeated error messages for references to undefined identifiers 188 -- and certain other repeated error messages. Set by use of -gnatf. 189 190 Allow_Integer_Address : Boolean := False; 191 -- GNAT 192 -- Allow use of integer expression in a context requiring System.Address. 193 -- Set by the use of configuration pragma Allow_Integer_Address Also set 194 -- in relaxed semantics mode for use by CodePeer or when -gnatd.M is used. 195 196 All_Sources : Boolean := False; 197 -- GNATBIND 198 -- Set to True to require all source files to be present. This flag is 199 -- directly modified by gnatmake to affect the shared binder routines. 200 201 Alternate_Main_Name : String_Ptr := null; 202 -- GNATBIND 203 -- Set to non null when Bind_Alternate_Main_Name is True. This value 204 -- is modified as needed by Gnatbind.Scan_Bind_Arg. 205 206 ASIS_Mode : Boolean := False; 207 -- GNAT 208 -- Enable semantic checks and tree transformations that are important 209 -- for ASIS but that are usually skipped if Operating_Mode is set to 210 -- Check_Semantics. This flag does not have the corresponding option to set 211 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON 212 -- from the code of GNSA-based tool (a client may need to set ON the 213 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not 214 -- make very much sense, because GNSA cannot do back annotation). 215 216 Assertions_Enabled : Boolean := False; 217 -- GNAT 218 -- Indicates default policy (True = Check, False = Ignore) to be applied 219 -- to all assertion aspects and pragmas, and to pragma Debug, if there is 220 -- no overriding Assertion_Policy, Check_Policy, or Debug_Policy pragma. 221 -- Set True by use of -gnata. 222 223 Assume_No_Invalid_Values : Boolean := False; 224 -- GNAT Normally, in accordance with (RM 13.9.1 (9-11)) the front end 225 -- assumes that values could have invalid representations, unless it can 226 -- clearly prove that the values are valid. If this switch is set (by 227 -- pragma Assume_No_Invalid_Values (On)), then the compiler assumes values 228 -- are valid and in range of their representations. This feature is now 229 -- fully enabled in the compiler. 230 231 Back_Annotate_Rep_Info : Boolean := False; 232 -- GNAT 233 -- If set True, enables back annotation of representation information 234 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR 235 -- (list representation information) or -gnatt (generate tree). It is 236 -- also set true if certain Unchecked_Conversion instantiations require 237 -- checking based on annotated values. 238 239 Back_End_Handles_Limited_Types : Boolean; 240 -- This flag is set true if the back end can properly handle limited or 241 -- other by reference types, and avoid copies. If this flag is False, then 242 -- the front end does special expansion for if/case expressions to make 243 -- sure that no copy occurs. If the flag is True, then the expansion for 244 -- if and case expressions relies on the back end properly handling things. 245 -- Currently the default is False for all cases (set in gnat1drv). The 246 -- default can be modified using -gnatd.L (sets the flag True). This is 247 -- used to test the possibility of having the backend handle this. 248 249 Back_End_Inlining : Boolean := False; 250 -- GNAT 251 -- Set True to activate inlining by back-end expansion. This is the normal 252 -- default mode for gcc targets, so it is True on such targets unless the 253 -- switches -gnatN or -gnatd.z are used. See circuitry in gnat1drv for the 254 -- exact conditions for setting this switch. 255 256 Bind_Alternate_Main_Name : Boolean := False; 257 -- GNATBIND 258 -- True if main should be called Alternate_Main_Name.all. 259 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg. 260 261 Bind_Main_Program : Boolean := True; 262 -- GNATBIND 263 -- Set to False if not binding main Ada program 264 265 Bind_For_Library : Boolean := False; 266 -- GNATBIND 267 -- Set to True if the binder needs to generate a file designed for building 268 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg. 269 270 Bind_Only : Boolean := False; 271 -- GNATMAKE, GPRBUILD 272 -- Set to True to skip compile and link steps 273 -- (except when Compile_Only and/or Link_Only are True). 274 275 Blank_Deleted_Lines : Boolean := False; 276 -- GNAT, GNATPREP 277 -- Output empty lines for each line of preprocessed input that is deleted 278 -- in the output, including preprocessor lines starting with a '#'. 279 280 Brief_Output : Boolean := False; 281 -- GNAT, GNATBIND 282 -- Force brief error messages to standard error, even if verbose mode is 283 -- set (so that main error messages go to standard output). 284 285 Build_Bind_And_Link_Full_Project : Boolean := False; 286 -- GNATMAKE 287 -- Set to True to build, bind and link all the sources of a project file 288 -- (switch -B) 289 290 Check_Aliasing_Of_Parameters : Boolean := False; 291 -- GNAT 292 -- Set to True to detect whether subprogram parameters and function results 293 -- alias the same object(s). 294 295 Check_Float_Overflow : Boolean := False; 296 -- GNAT 297 -- Set to True to check that operations on predefined unconstrained float 298 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 299 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 300 -- of the -gnateF switch. 301 302 Check_Object_Consistency : Boolean := False; 303 -- GNATBIND, GNATMAKE 304 -- Set to True to check whether every object file is consistent with its 305 -- corresponding ada library information (ALI) file. An object file is 306 -- inconsistent with the corresponding ALI file if the object file does 307 -- not exist or if it has an older time stamp than the ALI file. Default 308 -- above is for GNATBIND. GNATMAKE overrides this default to True (see 309 -- Make.Initialize) since we normally do need to check source consistencies 310 -- in gnatmake. 311 312 Check_Only : Boolean := False; 313 -- GNATBIND 314 -- Set to True to do checks only, no output of binder file 315 316 Check_Policy_List : Node_Id := Empty; 317 -- GNAT 318 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 319 -- that are linked through the Next_Pragma fields, with the list being 320 -- terminated by Empty. The order is most recently processed first. Note 321 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value 322 -- of this variable, implementing the required scope control for pragmas 323 -- appearing in a declarative part. 324 325 Check_Readonly_Files : Boolean := False; 326 -- GNATMAKE 327 -- Set to True to check readonly files during the make process 328 329 Check_Source_Files : Boolean := True; 330 -- GNATBIND, GNATMAKE 331 -- Set to True to enable consistency checking for any source files that 332 -- are present (i.e. date must match the date in the library info file). 333 -- Set to False for object file consistency check only. This flag is 334 -- directly modified by gnatmake, to affect the shared binder routines. 335 336 Check_Switches : Boolean := False; 337 -- GNATMAKE, GPBUILD 338 -- Set to True to check compiler options during the make process 339 340 Check_Unreferenced : Boolean := False; 341 -- GNAT 342 -- Set to True to enable checking for unreferenced entities other 343 -- than formal parameters (for which see Check_Unreferenced_Formals) 344 -- Modified by use of -gnatwu/U. 345 346 Check_Unreferenced_Formals : Boolean := False; 347 -- GNAT 348 -- Set to True to check for unreferenced formals. This is turned on by 349 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU. 350 351 Check_Validity_Of_Parameters : Boolean := False; 352 -- GNAT 353 -- Set to True to check for proper scalar initialization of subprogram 354 -- parameters on both entry and exit. Turned on by??? turned off by??? 355 356 Check_Withs : Boolean := False; 357 -- GNAT 358 -- Set to True to enable checking for unused withs, and also the case 359 -- of withing a package and using none of the entities in the package. 360 -- Modified by use of -gnatwu/U. 361 362 CodePeer_Mode : Boolean := False; 363 -- GNAT, GNATBIND, GPRBUILD 364 -- Enable full CodePeer mode (SCIL generation, disable switches that 365 -- interact badly with it, etc...). This is turned on by -gnatC. 366 367 Commands_To_Stdout : Boolean := False; 368 -- GNATMAKE 369 -- True if echoed commands to be written to stdout instead of stderr 370 371 Comment_Deleted_Lines : Boolean := False; 372 -- GNATPREP 373 -- True if source lines removed by the preprocessor should be commented 374 -- in the output file. 375 376 Compilation_Time : String (1 .. 19); 377 -- GNAT 378 -- Compilation date and time in form YYYY-MM-DD HH:MM:SS 379 380 Compile_Only : Boolean := False; 381 -- GNATMAKE, GNATCLEAN, GPBUILD, GPRCLEAN 382 -- GNATMAKE, GPRBUILD: 383 -- set True to skip bind and link steps (except when Bind_Only is True) 384 -- GNATCLEAN, GPRCLEAN: 385 -- set True to delete only the files produced by the compiler but not the 386 -- library files or the executable files. 387 388 Compiler_Unit : Boolean := False; 389 -- GNAT1 390 -- Set True by an occurrence of pragma Compiler_Unit_Warning (or of the 391 -- obsolete pragma Compiler_Unit) in the main unit. Once set True, stays 392 -- True, since any units that are with'ed directly or indirectly by 393 -- a Compiler_Unit_Warning main unit are subject to the same restrictions. 394 -- Such units really should have their own pragmas, but we do not bother to 395 -- check for that, so this transitivity provides extra checking. 396 397 Config_File : Boolean := True; 398 -- GNAT 399 -- Set to False to inhibit reading and processing of gnat.adc file 400 401 Config_File_Names : String_List_Access := null; 402 -- GNAT 403 -- Names of configuration pragmas files (given by switches -gnatec) 404 405 Configurable_Run_Time_Mode : Boolean := False; 406 -- GNAT, GNATBIND 407 -- Set True if the compiler is operating in configurable run-time mode. 408 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target 409 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind 410 -- for details on the handling of the latter pragma. 411 412 Constant_Condition_Warnings : Boolean := False; 413 -- GNAT 414 -- Set to True to activate warnings on constant conditions. Modified by 415 -- use of -gnatwc/C. 416 417 Create_Mapping_File : Boolean := False; 418 -- GNATMAKE 419 -- Set to True (-C switch) to indicate that the compiler will be invoked 420 -- with a mapping file (-gnatem compiler switch). 421 422 subtype Debug_Level_Value is Nat range 0 .. 3; 423 Debugger_Level : Debug_Level_Value := 0; 424 -- The value given to the -g parameter. The default value for -g with 425 -- no value is 2. This is not currently used but is retained for possible 426 -- future use. 427 428 Default_Exit_Status : Int := 0; 429 -- GNATBIND 430 -- Set the default exit status value. Set by the -Xnnn switch for the 431 -- binder. 432 433 Debug_Generated_Code : Boolean := False; 434 -- GNAT 435 -- Set True (-gnatD switch) to debug generated expanded code instead 436 -- of the original source code. Causes debugging information to be 437 -- written with respect to the generated code file that is written. 438 439 Default_Pool : Node_Id := Empty; 440 -- GNAT 441 -- Used to record the storage pool name (or null literal) that is the 442 -- argument of an applicable pragma Default_Storage_Pool. 443 -- Empty: No pragma Default_Storage_Pool applies. 444 -- N_Null node: "pragma Default_Storage_Pool (null);" applies. 445 -- otherwise: "pragma Default_Storage_Pool (X);" applies, and 446 -- this points to the name X. 447 -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value. 448 Default_Stack_Size : Int := -1; 449 -- GNATBIND 450 -- Set to default primary stack size in units of bytes. Set by 451 -- the -dnnn switch for the binder. A value of -1 indicates that no 452 -- default was set by the binder. 453 454 Default_Sec_Stack_Size : Int := -1; 455 -- GNATBIND 456 -- Set to default secondary stack size in units of bytes. Set by 457 -- the -Dnnn switch for the binder. A value of -1 indicates that no 458 -- default was set by the binder, and that the default should be the 459 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size. 460 461 Default_SSO : Character := ' '; 462 -- GNAT 463 -- Set if a pragma Default_Scalar_Storage_Order has been given. The value 464 -- of ' ' indicates that no default has been set, otherwise the value is 465 -- either 'H' for High_Order_First or 'L' for Lower_Order_First. 466 467 Detect_Blocking : Boolean := False; 468 -- GNAT 469 -- Set True to force the run time to raise Program_Error if calls to 470 -- potentially blocking operations are detected from protected actions. 471 472 Directories_Must_Exist_In_Projects : Boolean := True; 473 -- PROJECT MANAGER 474 -- Set to False with switch -f of gnatclean and gprclean 475 476 Display_Compilation_Progress : Boolean := False; 477 -- GNATMAKE, GPRBUILD 478 -- Set True (-d switch) to display information on progress while compiling 479 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS). 480 481 type Distribution_Stub_Mode_Type is 482 -- GNAT 483 (No_Stubs, 484 -- Normal mode, no generation/compilation of distribution stubs 485 486 Generate_Receiver_Stub_Body, 487 -- The unit being compiled is the RCI body, and the compiler will 488 -- generate the body for the receiver stubs and compile it. 489 490 Generate_Caller_Stub_Body); 491 -- The unit being compiled is the RCI spec, and the compiler will 492 -- generate the body for the caller stubs and compile it. 493 494 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs; 495 -- GNAT 496 -- This enumeration variable indicates the five states of distribution 497 -- annex stub generation/compilation. 498 499 Do_Not_Execute : Boolean := False; 500 -- GNATMAKE 501 -- Set to True if no actual compilations should be undertaken 502 503 Dump_Source_Text : Boolean := False; 504 -- GNAT 505 -- Set to True (by -gnatL) to dump source text intermingled with generated 506 -- code. Effective only if either of Debug/Print_Generated_Code is true. 507 508 Dynamic_Elaboration_Checks : Boolean := False; 509 -- GNAT 510 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 511 -- switch or by the use of pragma Elaboration_Checks (Dynamic). 512 513 Dynamic_Stack_Measurement : Boolean := False; 514 -- GNATBIND 515 -- Set True to enable dynamic stack measurement (-u flag for gnatbind) 516 517 Dynamic_Stack_Measurement_Array_Size : Nat := 100; 518 -- GNATBIND 519 -- Number of measurements we want to store during dynamic stack analysis. 520 -- When the buffer is full, non-storable results will be output on the fly. 521 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set 522 -- by processing of -u flag for gnatbind. 523 524 Elab_Dependency_Output : Boolean := False; 525 -- GNATBIND 526 -- Set to True to output complete list of elaboration constraints 527 528 Elab_Order_Output : Boolean := False; 529 -- GNATBIND 530 -- Set to True to output chosen elaboration order 531 532 Elab_Info_Messages : Boolean := False; 533 -- GNAT 534 -- Set to True to output info messages for static elabmodel (-gnatel) 535 536 Elab_Warnings : Boolean := False; 537 -- GNAT 538 -- Set to True to generate elaboration warnings (-gnatwl) 539 540 Error_Msg_Line_Length : Nat := 0; 541 -- GNAT 542 -- Records the error message line length limit. If this is set to zero, 543 -- then we get the old style behavior, in which each call to the error 544 -- message routines generates one line of output as a separate message. 545 -- If it is set to a non-zero value, then continuation lines are folded 546 -- to make a single long message, and then this message is split up into 547 -- multiple lines not exceeding the specified length. Set by -gnatj=nn. 548 549 Error_To_Warning : Boolean := False; 550 -- GNAT 551 -- If True, then certain error messages (e.g. parameter overlap messages 552 -- for procedure calls in Ada 2012 mode) are treated as warnings instead 553 -- of errors. Set by debug flag -gnatd.E. A search for Error_To_Warning 554 -- will identify affected messages. 555 556 Exception_Handler_Encountered : Boolean := False; 557 -- GNAT 558 -- This flag is set true if the parser encounters an exception handler. 559 -- It is used to set Warn_On_Exception_Propagation True if the restriction 560 -- No_Exception_Propagation is set. 561 562 Exception_Extra_Info : Boolean := False; 563 -- GNAT 564 -- True when switch -gnateE is used. When True, generate extra information 565 -- associated with exception messages (in particular range and index 566 -- checks). 567 568 Exception_Locations_Suppressed : Boolean := False; 569 -- GNAT 570 -- Set to True if a Suppress_Exception_Locations configuration pragma is 571 -- currently active. 572 573 type Exception_Mechanism_Type is 574 -- Determines the handling of exceptions. See Exp_Ch11 for details 575 -- 576 (Front_End_Setjmp_Longjmp_Exceptions, 577 -- Exceptions use setjmp/longjmp generated explicitly by the front end 578 -- (this includes gigi or other equivalent parts of the code generator). 579 -- AT END handlers are converted into exception handlers by the front 580 -- end in this mode. 581 582 Back_End_Exceptions); 583 -- Exceptions are handled by the back end. The front end simply 584 -- generates the handlers as they appear in the source, and AT END 585 -- handlers are left untouched (they are not converted into exception 586 -- handlers when operating in this mode. 587 pragma Convention (C, Exception_Mechanism_Type); 588 589 Exception_Mechanism : Exception_Mechanism_Type := 590 Front_End_Setjmp_Longjmp_Exceptions; 591 -- GNAT 592 -- Set to the appropriate value depending on the default as given in 593 -- system.ads (ZCX_By_Default). The C convention is there to make this 594 -- variable accessible to gigi. 595 596 Exception_Tracebacks : Boolean := False; 597 -- GNATBIND 598 -- Set to True to store tracebacks in exception occurrences (-E) 599 600 Extensions_Allowed : Boolean := False; 601 -- GNAT 602 -- Set to True by switch -gnatX if GNAT specific language extensions 603 -- are allowed. Currently there are no such defined extensions. 604 605 type External_Casing_Type is ( 606 As_Is, -- External names cased as they appear in the Ada source 607 Uppercase, -- External names forced to all uppercase letters 608 Lowercase); -- External names forced to all lowercase letters 609 610 External_Name_Imp_Casing : External_Casing_Type := Lowercase; 611 -- GNAT 612 -- The setting of this flag determines the casing of external names 613 -- when the name is implicitly derived from an entity name (i.e. either 614 -- no explicit External_Name or Link_Name argument is used, or, in the 615 -- case of extended DEC pragmas, the external name is given using an 616 -- identifier. The As_Is setting is not permitted here (since this would 617 -- create Ada source programs that were case sensitive). 618 619 External_Name_Exp_Casing : External_Casing_Type := As_Is; 620 -- GNAT 621 -- The setting of this flag determines the casing of an external name 622 -- specified explicitly with a string literal. As_Is means the string 623 -- literal is used as given with no modification to the casing. If 624 -- Lowercase or Uppercase is set, then the string is forced to all 625 -- lowercase or all uppercase letters as appropriate. Note that this 626 -- setting has no effect if the external name is given using an identifier 627 -- in the case of extended DEC import/export pragmas (in this case the 628 -- casing is controlled by External_Name_Imp_Casing), and also has no 629 -- effect if an explicit Link_Name is supplied (a link name is always 630 -- used exactly as given). 631 632 External_Unit_Compilation_Allowed : Boolean := False; 633 -- GNATMAKE 634 -- When True (set by gnatmake switch -x), allow compilation of sources 635 -- that are not part of any project file. 636 637 Fast_Math : Boolean := False; 638 -- GNAT 639 -- Indicates the current setting of Fast_Math mode, as set by the use 640 -- of a Fast_Math pragma (set True by Fast_Math (On)). 641 642 Force_ALI_Tree_File : Boolean := False; 643 -- GNAT 644 -- Force generation of ALI file even if errors are encountered. Also forces 645 -- generation of tree file if -gnatt is also set. Set on by use of -gnatQ. 646 647 Disable_ALI_File : Boolean := False; 648 -- GNAT 649 -- Disable generation of ALI file 650 651 Follow_Links_For_Files : Boolean := False; 652 -- PROJECT MANAGER 653 -- Set to True (-eL) to process the project files in trusted mode. If 654 -- Follow_Links is False, it is assumed that the project doesn't contain 655 -- any file duplicated through symbolic links (although the latter are 656 -- still valid if they point to a file which is outside of the project), 657 -- and that no directory has a name which is a valid source name. 658 659 Follow_Links_For_Dirs : Boolean := False; 660 -- PROJECT MANAGER 661 -- Set to True if directories can be links in this project, and therefore 662 -- additional system calls must be performed to ensure that we always see 663 -- the same full name for each directory. 664 665 Force_Checking_Of_Elaboration_Flags : Boolean := False; 666 -- GNATBIND 667 -- True if binding with forced checking of the elaboration flags 668 -- (-F switch set). 669 670 Force_Compilations : Boolean := False; 671 -- GNATMAKE, GPRBUILD 672 -- Set to force recompilations even when the objects are up-to-date. 673 674 Front_End_Inlining : Boolean := False; 675 -- GNAT 676 -- Set True to activate inlining by front-end expansion (even on GCC 677 -- targets, where inlining is normally handled by the back end). Set by 678 -- the flag -gnatN (which is now considered obsolescent, since the GCC 679 -- back end can do a better job of inlining than the front end these days. 680 681 Full_Path_Name_For_Brief_Errors : Boolean := False; 682 -- PROJECT MANAGER 683 -- When True, in Brief_Output mode, each error message line will start with 684 -- the full path name of the source. When False, only the file name without 685 -- directory information is used. 686 687 Full_List : Boolean := False; 688 -- GNAT 689 -- Set True to generate full source listing with embedded errors 690 691 Full_List_File_Name : String_Ptr := null; 692 -- GNAT 693 -- Set to file name to generate full source listing to named file (or if 694 -- the name is of the form .xxx, then to name.xxx where name is the source 695 -- file name with extension stripped. 696 697 Generate_CodePeer_Messages : Boolean := False; 698 -- GNAT 699 -- Generate CodePeer messages. Ignored if CodePeer_Mode is false. This is 700 -- turned on by -gnateC. 701 702 Generate_Processed_File : Boolean := False; 703 -- GNAT 704 -- True when switch -gnateG is used. When True, create in a file 705 -- <source>.prep, if the source is preprocessed. 706 707 Generate_SCIL : Boolean := False; 708 -- GNAT 709 -- Set True to activate SCIL code generation. 710 711 Generate_SCO : Boolean := False; 712 -- GNAT 713 -- True when switch -fdump-scos (or -gnateS) is used. When True, Source 714 -- Coverage Obligation (SCO) information is generated and output in the ALI 715 -- file. See unit Par_SCO for full details. 716 717 Generate_SCO_Instance_Table : Boolean := False; 718 -- GNAT 719 -- True when switch -fdump-scos is used. When True, a table of instances is 720 -- included in SCOs. 721 722 Generating_Code : Boolean := False; 723 -- GNAT 724 -- True if the frontend finished its work and has called the backend to 725 -- process the tree and generate the object file. 726 727 type Ghost_Mode_Type is (None, Check, Ignore); 728 -- Possible legal modes that can be set by aspect/pragma Ghost as well as 729 -- value None, which indicates that no such aspect/pragma applies. 730 731 Ghost_Mode : Ghost_Mode_Type := None; 732 -- GNAT 733 -- Current Ghost mode setting 734 735 Global_Discard_Names : Boolean := False; 736 -- GNAT, GNATBIND 737 -- True if a pragma Discard_Names appeared as a configuration pragma for 738 -- the current compilation unit. 739 740 GNAT_Encodings : Int; 741 pragma Import (C, GNAT_Encodings, "gnat_encodings"); 742 -- Constant controlling the balance between GNAT encodings and standard 743 -- DWARF to emit in the debug information. See jmissing.c and aamissing.c 744 -- for definitions for dotnet/jgnat and GNAAMP back ends. It accepts the 745 -- following values. 746 747 DWARF_GNAT_Encodings_All : constant Int := 0; 748 DWARF_GNAT_Encodings_GDB : constant Int := 1; 749 DWARF_GNAT_Encodings_Minimal : constant Int := 2; 750 751 Identifier_Character_Set : Character; 752 -- GNAT 753 -- This variable indicates the character set to be used for identifiers. 754 -- The possible settings are: 755 -- '1' Latin-1 (ISO-8859-1) 756 -- '2' Latin-2 (ISO-8859-2) 757 -- '3' Latin-3 (ISO-8859-3) 758 -- '4' Latin-4 (ISO-8859-4) 759 -- '5' Latin-Cyrillic (ISO-8859-5) 760 -- '9' Latin-9 (ISO-8859-15) 761 -- 'p' PC (US, IBM page 437) 762 -- '8' PC (European, IBM page 850) 763 -- 'f' Full upper set (all distinct) 764 -- 'n' No upper characters (Ada 83 rules) 765 -- 'w' Latin-1 plus wide characters allowed in identifiers 766 -- 767 -- The setting affects the set of letters allowed in identifiers and the 768 -- upper/lower case equivalences. It does not affect the interpretation of 769 -- character and string literals, which are always stored using the actual 770 -- coding in the source program. This variable is initialized to the 771 -- default value appropriate to the system (in Osint.Initialize), and then 772 -- reset if a command line switch is used to change the setting. 773 774 Ignore_Pragma_SPARK_Mode : Boolean := False; 775 -- GNAT 776 -- Set True to ignore the semantics and effects of pragma SPARK_Mode when 777 -- the pragma appears inside an instance whose enclosing context is subject 778 -- to SPARK_Mode "off". 779 780 Ignore_Rep_Clauses : Boolean := False; 781 -- GNAT 782 -- Set True to ignore all representation clauses. Useful when compiling 783 -- code from foreign compilers for checking or ASIS purposes. Can be 784 -- set True by use of -gnatI. 785 786 Ignore_Style_Checks_Pragmas : Boolean := False; 787 -- GNAT 788 -- Set True to ignore all Style_Checks pragmas. Can be set True by use 789 -- of -gnateY. 790 791 Ignore_Unrecognized_VWY_Switches : Boolean := False; 792 -- GNAT 793 -- Set True to ignore unrecognized y, V, w switches. Can be set True 794 -- by use of -gnateu, causing subsequent unrecognized switches to result 795 -- in a warning rather than an error. 796 797 Implementation_Unit_Warnings : Boolean := True; 798 -- GNAT 799 -- Set True to active warnings for use of implementation internal units. 800 -- Modified by use of -gnatwi/-gnatwI. 801 802 Implicit_Packing : Boolean := False; 803 -- GNAT 804 -- If set True, then a Size attribute clause on an array is allowed to 805 -- cause implicit packing instead of generating an error message. Set by 806 -- use of pragma Implicit_Packing. 807 808 Ineffective_Inline_Warnings : Boolean := False; 809 -- GNAT 810 -- Set True to activate warnings if front-end inlining (-gnatN) is not able 811 -- to actually inline a particular call (or all calls). Can be controlled 812 -- by use of -gnatwp/-gnatwP. Also set True to activate warnings if 813 -- frontend inlining is not able to inline a subprogram expected to 814 -- be inlined in GNATprove mode. 815 816 Init_Or_Norm_Scalars : Boolean := False; 817 -- GNAT, GANTBIND 818 -- Set True if a pragma Initialize_Scalars applies to the current unit. 819 -- Also set True if a pragma Restriction (Normalize_Scalars) applies. 820 821 Initialize_Scalars : Boolean := False; 822 -- GNAT 823 -- Set True if a pragma Initialize_Scalars applies to the current unit. 824 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 825 826 Initialize_Scalars_Mode1 : Character := 'I'; 827 Initialize_Scalars_Mode2 : Character := 'N'; 828 -- GNATBIND 829 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default 830 -- is IN (invalid values), used if no -S switch is used. 831 832 Inline_Active : Boolean := False; 833 -- GNAT 834 -- Set True to activate pragma Inline processing across modules. Default 835 -- for now is not to inline across module boundaries. 836 837 Inline_Level : Nat := 0; 838 -- GNAT 839 -- Set to indicate the inlining level: 0 means that an appropriate value is 840 -- to be computed by the compiler based on the optimization level (-gnatn), 841 -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full 842 -- inlining across modules (-gnatn2). 843 844 Interface_Library_Unit : Boolean := False; 845 -- GNATBIND 846 -- Set to True to indicate that at least one ALI file is an interface ALI: 847 -- then elaboration flag checks are to be generated in the binder 848 -- generated file. 849 850 Invalid_Value_Used : Boolean := False; 851 -- GNAT 852 -- Set True if a valid Invalid_Value attribute is encountered 853 854 Inline_Processing_Required : Boolean := False; 855 -- GNAT 856 -- Set True if inline processing is required. Inline processing is required 857 -- if an active Inline pragma is processed. The flag is set for a pragma 858 -- Inline or Inline_Always that is actually active. 859 860 In_Place_Mode : Boolean := False; 861 -- GNATMAKE 862 -- Set True to store ALI and object files in place i.e. in the object 863 -- directory if these files already exist or in the source directory 864 -- if not. 865 866 Keep_Going : Boolean := False; 867 -- GNATMAKE, GPRBUILD 868 -- When True signals to ignore compilation errors and keep processing 869 -- sources until there is no more work. 870 871 Keep_Temporary_Files : Boolean := False; 872 -- GNATCMD, GNATMAKE, GPRBUILD 873 -- When True the temporary files are not deleted. Set by switches -dn or 874 -- --keep-temp-files. 875 876 Leap_Seconds_Support : Boolean := False; 877 -- GNATBIND 878 -- Set to True to enable leap seconds support in Ada.Calendar and its 879 -- children. 880 881 Link_Only : Boolean := False; 882 -- GNATMAKE, GPRBUILD 883 -- Set to True to skip compile and bind steps (except when Bind_Only is 884 -- set to True). 885 886 List_Body_Required_Info : Boolean := False; 887 -- GNATMAKE 888 -- List info messages about why a package requires a body. Modified by use 889 -- of -gnatw.y/.Y. 890 891 List_Inherited_Aspects : Boolean := False; 892 -- GNAT 893 -- List inherited invariants, preconditions, and postconditions from 894 -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited 895 -- subtype predicates. Modified by use of -gnatw.l/.L. 896 897 List_Restrictions : Boolean := False; 898 -- GNATBIND 899 -- Set to True to list restrictions pragmas that could apply to partition 900 901 List_Units : Boolean := False; 902 -- GNAT 903 -- List units in the active library for a compilation (-gnatu switch) 904 905 List_Closure : Boolean := False; 906 -- GNATBIND 907 -- List all sources in the closure of a main (-R or -Ra gnatbind switch) 908 909 List_Closure_All : Boolean := False; 910 -- GNATBIND 911 -- List all sources in closure of main including run-time units (-Ra 912 -- gnatbind switch). 913 914 List_Dependencies : Boolean := False; 915 -- GNATMAKE 916 -- When True gnatmake verifies that the objects are up to date and outputs 917 -- the list of object dependencies (-M switch). Output depends if -a switch 918 -- is used or not. This list can be used directly in a Makefile. 919 920 List_Representation_Info : Int range 0 .. 3 := 0; 921 -- GNAT 922 -- Set non-zero by -gnatR switch to list representation information. 923 -- The settings are as follows: 924 -- 925 -- 0 = no listing of representation information (default as above) 926 -- 1 = list rep info for user defined record and array types 927 -- 2 = list rep info for all user defined types and objects 928 -- 3 = like 2, but variable fields are decoded symbolically 929 930 List_Representation_Info_To_File : Boolean := False; 931 -- GNAT 932 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3/m to be 933 -- written to file.rep (where file is the name of the source file) instead 934 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then 935 -- representation info is written to x.adb.ref. 936 937 List_Representation_Info_Mechanisms : Boolean := False; 938 -- GNAT 939 -- Set true by -gnatRm switch. Causes information on mechanisms to be 940 -- included in the representation output information. 941 942 List_Preprocessing_Symbols : Boolean := False; 943 -- GNAT, GNATPREP 944 -- Set to True if symbols for preprocessing a source are to be listed 945 -- before preprocessing occurs. Set to True by switch -s of gnatprep or 946 -- -s in preprocessing data file for the compiler. 947 948 type Create_Repinfo_File_Proc is access procedure (Src : String); 949 type Write_Repinfo_Line_Proc is access procedure (Info : String); 950 type Close_Repinfo_File_Proc is access procedure; 951 -- Types used for procedure addresses below 952 953 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null; 954 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null; 955 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null; 956 -- GNAT 957 -- These three locations are left null when operating in non-compiler (e.g. 958 -- ASIS mode), but when operating in compiler mode, they are set to point 959 -- to the three corresponding procedures in Osint-C. The reason for this 960 -- slightly strange interface is to stop Repinfo from dragging in Osint in 961 -- ASIS mode, which would include lots of unwanted units in the ASIS build. 962 963 type Create_List_File_Proc is access procedure (S : String); 964 type Write_List_Info_Proc is access procedure (S : String); 965 type Close_List_File_Proc is access procedure; 966 -- Types used for procedure addresses below 967 968 Create_List_File_Access : Create_List_File_Proc := null; 969 Write_List_Info_Access : Write_List_Info_Proc := null; 970 Close_List_File_Access : Close_List_File_Proc := null; 971 -- GNAT 972 -- These three locations are left null when operating in non-compiler 973 -- (e.g. from the binder), but when operating in compiler mode, they are 974 -- set to point to the three corresponding procedures in Osint-C. The 975 -- reason for this slightly strange interface is to prevent Repinfo 976 -- from dragging in Osint-C in the binder, which would include unwanted 977 -- units in the binder. 978 979 Locking_Policy : Character := ' '; 980 -- GNAT, GNATBIND 981 -- Set to ' ' for the default case (no locking policy specified). Reset to 982 -- first character (uppercase) of locking policy name if a valid pragma 983 -- Locking_Policy is encountered. 984 985 Locking_Policy_Sloc : Source_Ptr := No_Location; 986 -- GNAT, GNATBIND 987 -- Remember location of previous Locking_Policy pragma. This is used for 988 -- inconsistency error messages. A value of System_Location is used if the 989 -- policy is set in package System. 990 991 Look_In_Primary_Dir : Boolean := True; 992 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN 993 -- Set to False if a -I- was present on the command line. When True we are 994 -- allowed to look in the primary directory to locate other source or 995 -- library files. 996 997 Make_Steps : Boolean := False; 998 -- GNATMAKE 999 -- Set to True when either Compile_Only, Bind_Only or Link_Only is 1000 -- set to True. 1001 1002 Main_Index : Int := 0; 1003 -- GNATMAKE 1004 -- This is set to non-zero by gnatmake switch -eInnn to indicate that 1005 -- the main program is the nnn unit in a multi-unit source file. 1006 1007 Mapping_File_Name : String_Ptr := null; 1008 -- GNAT 1009 -- File name of mapping between unit names, file names and path names. 1010 -- (given by switch -gnatem) 1011 1012 Maximum_Messages : Int := 9999; 1013 -- GNAT, GNATBIND 1014 -- Maximum default number of errors before compilation is terminated, or in 1015 -- the case of GNAT, maximum number of warnings before further warnings are 1016 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch. 1017 1018 Maximum_File_Name_Length : Int; 1019 -- GNAT, GNATBIND 1020 -- Maximum number of characters allowed in a file name, not counting the 1021 -- extension, as set by the appropriate switch. If no switch is given, 1022 -- then this value is initialized by Osint to the appropriate value. 1023 1024 Maximum_Instantiations : Int := 8000; 1025 -- GNAT 1026 -- Maximum number of instantiations permitted (to stop runaway cases 1027 -- of nested instantiations). These situations probably only occur in 1028 -- specially concocted test cases. Can be modified by -gnateinn switch. 1029 1030 Maximum_Processes : Positive := 1; 1031 -- GNATMAKE, GPRBUILD 1032 -- Maximum number of processes that should be spawned to carry out 1033 -- compilations. 1034 1035 Minimal_Recompilation : Boolean := False; 1036 -- GNATMAKE 1037 -- Set to True if minimal recompilation mode requested 1038 1039 Modify_Tree_For_C : Boolean := False; 1040 -- GNAT 1041 -- If this switch is set True (currently it is set only by -gnatd.V), then 1042 -- certain meaning-preserving transformations are applied to the tree to 1043 -- make it easier to interface with back ends that implement C semantics. 1044 -- There is a section in Sinfo which describes the transformations made. 1045 1046 Multiple_Unit_Index : Int := 0; 1047 -- GNAT 1048 -- This is set non-zero if the current unit is being compiled in multiple 1049 -- unit per file mode, meaning that the current unit is selected from the 1050 -- sequence of units in the current source file, using the value stored 1051 -- in this variable (e.g. 2 = select second unit in file). A value of 1052 -- zero indicates that we are in normal (one unit per file) mode. 1053 1054 No_Backup : Boolean := False; 1055 -- GNATNAME 1056 -- Do not create backup copies of project files. Set by switch --no-backup. 1057 1058 No_Deletion : Boolean := False; 1059 -- GNATPREP 1060 -- Set by preprocessor switch -a. Do not eliminate any source text. Implies 1061 -- Undefined_Symbols_Are_False. Useful to perform a syntax check on all 1062 -- branches of #if constructs. 1063 1064 No_Elab_Code_All_Pragma : Node_Id := Empty; 1065 -- Set to point to a No_Elaboration_Code_All pragma or aspect encountered 1066 -- in the spec of the extended main unit. Used to determine if we need to 1067 -- do special tests for violation of this aspect. 1068 1069 No_Main_Subprogram : Boolean := False; 1070 -- GNATMAKE, GNATBIND 1071 -- Set to True if compilation/binding of a program without main 1072 -- subprogram requested. 1073 1074 No_Run_Time_Mode : Boolean := False; 1075 -- GNAT, GNATBIND 1076 -- This flag is set True if a No_Run_Time pragma is encountered. See spec 1077 -- of Rtsfind for a full description of handling of this pragma. 1078 1079 No_Split_Units : Boolean := False; 1080 -- GPRBUILD 1081 -- Set to True with switch --no-split-units. When True, unit sources, spec, 1082 -- body and subunits, must all be in the same project. This is checked 1083 -- after each compilation. 1084 1085 No_Stdinc : Boolean := False; 1086 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF 1087 -- Set to True if no default source search dirs added to search list. 1088 1089 No_Stdlib : Boolean := False; 1090 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF 1091 -- Set to True if no default library search dirs added to search list. 1092 1093 No_Strict_Aliasing : Boolean := False; 1094 -- GNAT 1095 -- Set True if pragma No_Strict_Aliasing with no parameters encountered. 1096 1097 No_Tagged_Streams : Node_Id := Empty; 1098 -- GNAT 1099 -- If a pragma No_Tagged_Streams is active for the current scope, this 1100 -- points to the corresponding pragma. 1101 1102 Normalize_Scalars : Boolean := False; 1103 -- GNAT, GNATBIND 1104 -- Set True if a pragma Normalize_Scalars applies to the current unit. 1105 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 1106 1107 Object_Directory_Present : Boolean := False; 1108 -- GNATMAKE 1109 -- Set to True when an object directory is specified with option -D 1110 1111 Object_Path_File_Name : String_Ptr := null; 1112 -- GNAT2WHY 1113 -- Path of the temporary file that contains a list of object directories 1114 -- passed by -gnateO=<obj_path_file>. 1115 1116 One_Compilation_Per_Obj_Dir : Boolean := False; 1117 -- GNATMAKE, GPRBUILD 1118 -- Set to True with switch --single-compile-per-obj-dir. When True, there 1119 -- cannot be simultaneous compilations with the object files in the same 1120 -- object directory, if project files are used. 1121 1122 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code); 1123 pragma Ordered (Operating_Mode_Type); 1124 Operating_Mode : Operating_Mode_Type := Generate_Code; 1125 -- GNAT 1126 -- Indicates the operating mode of the compiler. The default is generate 1127 -- code, which runs the parser, semantics and backend. Switches can be 1128 -- used to set syntax checking only mode, or syntax and semantics checking 1129 -- only mode. Operating_Mode can also be modified as a result of detecting 1130 -- errors during the compilation process. In particular if any serious 1131 -- error is detected then this flag is reset from Generate_Code to 1132 -- Check_Semantics after generating an error message. This is an ordered 1133 -- type with the semantics that each value does more than the previous one. 1134 1135 Optimize_Alignment : Character := 'O'; 1136 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can 1137 -- be modified by use of pragma Optimize_Alignment. 1138 1139 Optimize_Alignment_Local : Boolean := False; 1140 -- Set True if Optimize_Alignment mode is set by a local configuration 1141 -- pragma that overrides the gnat.adc (or other configuration file) default 1142 -- so that the unit is not dependent on the default setting. Also always 1143 -- set True for internal units, since these always have a default setting 1144 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to 1145 -- them all having such an explicit pragma in each unit). 1146 1147 Original_Operating_Mode : Operating_Mode_Type := Generate_Code; 1148 -- GNAT 1149 -- Indicates the original operating mode of the compiler as set by compiler 1150 -- options. This is identical to Operating_Mode except that this is not 1151 -- affected by errors. 1152 1153 Optimization_Level : Int; 1154 pragma Import (C, Optimization_Level, "optimize"); 1155 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3) 1156 -- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and 1157 -- GNAAMP back ends. 1158 1159 Optimize_Size : Int; 1160 pragma Import (C, Optimize_Size, "optimize_size"); 1161 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero 1162 -- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c 1163 -- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends 1164 1165 Output_File_Name_Present : Boolean := False; 1166 -- GNATBIND, GNAT, GNATMAKE 1167 -- Set to True when the output C file name is given with option -o for 1168 -- GNATBIND, when the object file name is given with option -gnatO for GNAT 1169 -- or when the executable is given with option -o for GNATMAKE. 1170 1171 Output_Linker_Option_List : Boolean := False; 1172 -- GNATBIND 1173 -- True if output of list of linker options is requested (-K switch set) 1174 1175 Output_ALI_List : Boolean := False; 1176 ALI_List_Filename : String_Ptr; 1177 -- GNATBIND 1178 -- True if output of list of ALIs is requested (-A switch set). List is 1179 -- output under the given filename, or standard output if not specified. 1180 1181 Output_Object_List : Boolean := False; 1182 Object_List_Filename : String_Ptr; 1183 -- GNATBIND 1184 -- True if output of list of objects is requested (-O switch set). List is 1185 -- output under the given filename, or standard output if not specified. 1186 1187 Partition_Elaboration_Policy : Character := ' '; 1188 -- GNAT, GNATBIND 1189 -- Set to ' ' for the default case (no elaboration policy specified). Reset 1190 -- to first character (uppercase) of locking policy name if a valid pragma 1191 -- Partition_Elaboration_Policy is encountered. 1192 1193 Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location; 1194 -- GNAT, GNATBIND 1195 -- Remember location of previous Partition_Elaboration_Policy pragma. This 1196 -- is used for inconsistency error messages. A value of System_Location is 1197 -- used if the policy is set in package System. 1198 1199 Persistent_BSS_Mode : Boolean := False; 1200 -- GNAT 1201 -- True if a Persistent_BSS configuration pragma is in effect, causing 1202 -- potentially persistent data to be placed in the persistent_bss section. 1203 1204 Pessimistic_Elab_Order : Boolean := False; 1205 -- GNATBIND 1206 -- True if pessimistic elaboration order is to be chosen (-p switch set) 1207 1208 Polling_Required : Boolean := False; 1209 -- GNAT 1210 -- Set to True if polling for asynchronous abort is enabled by using 1211 -- the -gnatP option for GNAT. 1212 1213 Prefix_Exception_Messages : Boolean := False; 1214 -- GNAT 1215 -- Set True to prefix exception messages with entity-name: 1216 1217 Preprocessing_Data_File : String_Ptr := null; 1218 -- GNAT 1219 -- Set by switch -gnatep=. The file name of the preprocessing data file. 1220 1221 Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4); 1222 -- An extensible array to temporarily stores symbol definitions specified 1223 -- on the command line with -gnateD switches. The value 4 is an arbitrary 1224 -- starting point, if more space is needed it is allocated as required. 1225 1226 Preprocessing_Symbol_Last : Natural := 0; 1227 -- Index of last symbol definition in array Symbol_Definitions 1228 1229 Print_Generated_Code : Boolean := False; 1230 -- GNAT 1231 -- Set to True to enable output of generated code in source form. This 1232 -- flag is set by the -gnatG switch. 1233 1234 Print_Standard : Boolean := False; 1235 -- GNAT 1236 -- Set to true to enable printing of package standard in source form. 1237 -- This flag is set by the -gnatS switch 1238 1239 type Usage is (Unknown, Not_In_Use, In_Use); 1240 Project_File_In_Use : Usage := Unknown; 1241 -- GNAT 1242 -- Indicates if a project file is used or not. Set to In_Use by the first 1243 -- SFNP pragma. 1244 1245 Queuing_Policy : Character := ' '; 1246 -- GNAT, GNATBIND 1247 -- Set to ' ' for the default case (no queuing policy specified). Reset to 1248 -- first character (uppercase) of locking policy name if a valid 1249 -- Queuing_Policy pragma is encountered. 1250 1251 Queuing_Policy_Sloc : Source_Ptr := No_Location; 1252 -- GNAT, GNATBIND 1253 -- Remember location of previous Queuing_Policy pragma. This is used for 1254 -- inconsistency error messages. A value of System_Location is used if the 1255 -- policy is set in package System. 1256 1257 Quiet_Output : Boolean := False; 1258 -- GNATMAKE, GNATCLEAN, GPRBUILD, GPRCLEAN 1259 -- Set to True if the tool should not have any output if there are no 1260 -- errors or warnings. 1261 1262 Overriding_Renamings : Boolean := False; 1263 -- GNAT 1264 -- Set to True to enable compatibility mode with Rational compiler, and 1265 -- to accept renamings of implicit operations in their own scope. 1266 1267 Relaxed_RM_Semantics : Boolean := False; 1268 -- GNAT 1269 -- Set to True to ignore some Ada semantic error to help parse legacy Ada 1270 -- code for use in e.g. static analysis (such as CodePeer). This deals 1271 -- with cases where other compilers allow illegal constructs. Tools such as 1272 -- CodePeer are interested in analyzing code rather than enforcing legality 1273 -- rules, so as long as these illegal constructs end up with code that can 1274 -- be handled by the tool in question, there is no reason to reject the 1275 -- code that is considered correct by the other compiler. 1276 1277 Replace_In_Comments : Boolean := False; 1278 -- GNATPREP 1279 -- Set to True if -C switch used. 1280 1281 RTS_Lib_Path_Name : String_Ptr := null; 1282 RTS_Src_Path_Name : String_Ptr := null; 1283 -- GNAT 1284 -- Set to the "adalib" and "adainclude" directories of the run time 1285 -- specified by --RTS=. 1286 1287 RTS_Switch : Boolean := False; 1288 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF 1289 -- Set to True when the --RTS switch is set 1290 1291 Run_Path_Option : Boolean := True; 1292 -- GNATMAKE, GNATLINK 1293 -- Set to False when no run_path_option should be issued to the linker 1294 1295 Search_Directory_Present : Boolean := False; 1296 -- GNAT 1297 -- Set to True when argument is -I. Reset to False when next argument, a 1298 -- search directory path is taken into account. Note that this is quite 1299 -- different from other switches in this section in that it is only set in 1300 -- a transitory manner as a result of scanning a -I switch with no file 1301 -- name, and if set, is an indication that the next argument is to be 1302 -- treated as a file name. 1303 1304 Sec_Stack_Used : Boolean := False; 1305 -- GNAT, GBATBIND 1306 -- Set True if generated code uses the System.Secondary_Stack package. For 1307 -- the binder, set if any unit uses the secondary stack package. 1308 1309 Setup_Projects : Boolean := False; 1310 -- GNAT DRIVER 1311 -- Set to True for GNAT SETUP: the Project Manager creates non existing 1312 -- object, library and exec directories. 1313 1314 Shared_Libgnat : Boolean; 1315 -- GNATBIND 1316 -- Set to True if a shared libgnat is requested by using the -shared option 1317 -- for GNATBIND and to False when using the -static option. The value of 1318 -- this flag is set by Gnatbind.Scan_Bind_Arg. 1319 1320 Short_Circuit_And_Or : Boolean := False; 1321 -- GNAT 1322 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit. 1323 1324 type SPARK_Mode_Type is (None, Off, On); 1325 -- Possible legal modes that can be set by aspect/pragma SPARK_Mode, as 1326 -- well as the value None, which indicates no such pragma/aspect applies. 1327 1328 SPARK_Mode : SPARK_Mode_Type := None; 1329 -- GNAT 1330 -- Current SPARK mode setting. 1331 1332 SPARK_Mode_Pragma : Node_Id := Empty; 1333 -- GNAT 1334 -- If the current SPARK_Mode (above) was set by a pragma, this records 1335 -- the pragma that set this mode. 1336 1337 SPARK_Switches_File_Name : String_Ptr := null; 1338 -- GNAT 1339 -- Set to non-null file name by use of the -gnates switch to specify 1340 -- SPARK (gnat2why) specific switches in the given file name. 1341 1342 Special_Exception_Package_Used : Boolean := False; 1343 -- GNAT 1344 -- Set to True if either of the unit GNAT.Most_Recent_Exception or 1345 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of 1346 -- local raise statements into gotos in the presence of either package. 1347 1348 Sprint_Line_Limit : Nat := 72; 1349 -- GNAT 1350 -- Limit values for chopping long lines in Cprint/Sprint output, can be 1351 -- reset by use of NNN parameter with -gnatG or -gnatD switches. 1352 1353 Stack_Checking_Enabled : Boolean := False; 1354 -- GNAT 1355 -- Set to indicate if stack checking is enabled for the compilation. This 1356 -- is set directly from the value in the gcc back end in the body of the 1357 -- gcc version of back_end.adb. 1358 1359 Style_Check : Boolean := False; 1360 -- GNAT 1361 -- Set True to perform style checks. Activates checks carried out in 1362 -- package Style (see body of this package for details of checks). This 1363 -- flag is set True by use of either the -gnatg or -gnaty switches, or 1364 -- by the Style_Check pragma. 1365 1366 Style_Check_Main : Boolean := False; 1367 -- GNAT 1368 -- Set True if Style_Check was set for the main unit. This is used to 1369 -- renable style checks for units in the mail extended source that get 1370 -- with'ed indirectly. It is set True by use of either the -gnatg or 1371 -- -gnaty switches, but not by use of the Style_Checks pragma. 1372 1373 Disable_FE_Inline : Boolean := False; 1374 Disable_FE_Inline_Always : Boolean := False; 1375 -- GNAT 1376 -- Request to disable front end inlining from pragma Inline or pragma 1377 -- Inline_Always out of the presence of the -fno-inline back end flag 1378 -- on the command line, regardless of any other switches that are set. 1379 -- It remains the back end's reponsibility to honor -fno-inline at the 1380 -- back end level. 1381 1382 Suppress_Control_Flow_Optimizations : Boolean := False; 1383 -- GNAT 1384 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations 1385 -- that interfere with coverage analysis based on the object code. 1386 1387 System_Extend_Pragma_Arg : Node_Id := Empty; 1388 -- GNAT 1389 -- Set non-empty if and only if a correct Extend_System pragma was present 1390 -- in which case it points to the argument of the pragma, and the name can 1391 -- be located as Chars (Expression (System_Extend_Pragma_Arg)). 1392 1393 System_Extend_Unit : Node_Id := Empty; 1394 -- GNAT 1395 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System 1396 -- is never appropriate in GNAT_Mode (and causes troubles, including 1397 -- bogus circularities, if we try to compile the run-time library with 1398 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit 1399 -- is a copy of the value set in System_Extend_Pragma_Arg. 1400 1401 Subunits_Missing : Boolean := False; 1402 -- GNAT 1403 -- This flag is set true if missing subunits are detected with code 1404 -- generation active. This causes code generation to be skipped. 1405 1406 Suppress_Checks : Boolean := False; 1407 -- GNAT 1408 -- Set to True if -gnatp (suppress all checks) switch present. 1409 1410 Suppress_Options : Suppress_Record; 1411 -- GNAT 1412 -- Indicates outer level setting of check suppression. This initializes 1413 -- the settings of the outer scope level in any unit compiled. This is 1414 -- initialized by Osint.Initialize, and further initialized by the 1415 -- Adjust_Global_Switches flag in Gnat1drv. 1416 1417 Table_Factor : Int := 1; 1418 -- GNAT 1419 -- Factor by which all initial table sizes set in Alloc are multiplied. 1420 -- Used in Table to calculate initial table sizes (the initial table size 1421 -- is the value in Alloc, used as the Table_Initial parameter value, 1422 -- multiplied by the factor given here. The default value is used if no 1423 -- -gnatT switch appears. 1424 1425 Tagged_Type_Expansion : Boolean := True; 1426 -- GNAT 1427 -- Set True if tagged types and interfaces should be expanded by the 1428 -- front-end. If False, the original tree is left unexpanded for tagged 1429 -- types and dispatching calls, assuming the underlying target supports 1430 -- it (e.g. in the JVM case). 1431 1432 Target_Dependent_Info_Read_Name : String_Ptr := null; 1433 -- GNAT 1434 -- Set non-null to override the normal processing in Get_Targ and set the 1435 -- necessary information by reading the target dependent information file 1436 -- whose name is given here (see packages Get_Targ and Set_Targ for full 1437 -- details). Set to non-null file name by use of the -gnateT switch. 1438 1439 Target_Dependent_Info_Write_Name : String_Ptr := null; 1440 -- GNAT 1441 -- Set non-null to enable a call to Set_Targ.Write_Target_Dependent_Info 1442 -- which writes a target independent information file (see packages 1443 -- Get_Targ and Set_Targ for full details) using the name given by 1444 -- this switch. Set to non-null file name by use of the -gnatet switch. 1445 1446 type Origin_Of_Target is (Unknown, Default, Specified); 1447 1448 Target_Origin : Origin_Of_Target := Unknown; 1449 -- GPRBUILD 1450 -- Indicates the origin of attribute Target in project files 1451 1452 Target_Value : String_Access := null; 1453 -- GPRBUILD 1454 -- Indicates the value of attribute Target in project files 1455 1456 Task_Dispatching_Policy : Character := ' '; 1457 -- GNAT, GNATBIND 1458 -- Set to ' ' for the default case (no task dispatching policy specified). 1459 -- Reset to first character (uppercase) of task dispatching policy name 1460 -- if a valid Task_Dispatching_Policy pragma is encountered. 1461 1462 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location; 1463 -- GNAT, GNATBIND 1464 -- Remember location of previous Task_Dispatching_Policy pragma. This is 1465 -- used for inconsistency error messages. A value of System_Location is 1466 -- used if the policy is set in package System. 1467 1468 Tasking_Used : Boolean := False; 1469 -- Set True if any tasking construct is encountered. Used to activate the 1470 -- output of the Q, L and T lines in ALI files. 1471 1472 Time_Slice_Set : Boolean := False; 1473 -- GNATBIND 1474 -- Set True if a pragma Time_Slice is processed in the main unit, or 1475 -- if the -gnatTnn switch is present to set a time slice value. 1476 1477 Time_Slice_Value : Nat; 1478 -- GNATBIND 1479 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if 1480 -- Time_Slice pragma has been processed. Set to the time slice value in 1481 -- microseconds. Negative values are stored as zero, and the value is not 1482 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are 1483 -- reset to this maximum. This can also be set with the -gnatTnn switch. 1484 1485 Tolerate_Consistency_Errors : Boolean := False; 1486 -- GNATBIND 1487 -- Tolerate time stamp and other consistency errors. If this flag is set to 1488 -- True (-t), then inconsistencies result in warnings rather than errors. 1489 1490 Treat_Categorization_Errors_As_Warnings : Boolean := False; 1491 -- Normally categorization errors are true illegalities. If this switch 1492 -- is set, then such errors result in warning messages rather than error 1493 -- messages. Set True by -gnateP (P for Pure/Preelaborate). Also set in 1494 -- Relaxed_RM_Semantics mode since some old Ada 83 compilers treated 1495 -- pragma Preelaborate differently. 1496 1497 Treat_Restrictions_As_Warnings : Boolean := False; 1498 -- GNAT 1499 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by 1500 -- -gnatr switch. 1501 1502 Tree_Output : Boolean := False; 1503 -- GNAT 1504 -- Set to True (-gnatt) to generate output tree file 1505 1506 Try_Semantics : Boolean := False; 1507 -- GNAT 1508 -- Flag set to force attempt at semantic analysis, even if parser errors 1509 -- occur. This will probably cause blowups at this stage in the game. On 1510 -- the other hand, most such blowups will be caught cleanly and simply 1511 -- say compilation abandoned. This flag is set True by -gnatq or -gnatQ. 1512 1513 Unchecked_Shared_Lib_Imports : Boolean := False; 1514 -- GPRBUILD 1515 -- Set to True when shared library projects are allowed to import projects 1516 -- that are not shared library projects. Set on by use of the switch 1517 -- --unchecked-shared-lib-imports. 1518 1519 Undefined_Symbols_Are_False : Boolean := False; 1520 -- GNAT, GNATPREP 1521 -- Set to True by switch -u of gnatprep or -u in the preprocessing data 1522 -- file for the compiler. Indicates that while preprocessing sources, 1523 -- symbols that are not defined have the value FALSE. 1524 1525 Uneval_Old : Character := 'E'; 1526 -- GNAT 1527 -- Set to 'E'/'W'/'A' for use of Error/Warn/Allow in a valid pragma 1528 -- Unevaluated_Use_Of_Old. Default in the absence of the pragma is 'E' 1529 -- for the RM default behavior of giving an error. 1530 1531 Unique_Error_Tag : Boolean := Tag_Errors; 1532 -- GNAT 1533 -- Indicates if error messages are to be prefixed by the string error: 1534 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch. 1535 1536 Unnest_Subprogram_Mode : Boolean := False; 1537 -- If true, activates the circuitry for unnesting subprograms (see the spec 1538 -- of Exp_Unst for full details). Currently set only by use of -gnatd.1. 1539 1540 Universal_Addressing_On_AAMP : Boolean := False; 1541 -- GNAAMP 1542 -- Indicates if library-level objects should be accessed and updated using 1543 -- universal addressing instructions on the AAMP architecture. This flag is 1544 -- set to True when pragma Universal_Data is given as a configuration 1545 -- pragma. 1546 1547 Unreserve_All_Interrupts : Boolean := False; 1548 -- GNAT, GNATBIND 1549 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma 1550 -- appears anywhere in the main unit for GNAT, or if any ALI file has the 1551 -- corresponding attribute set in GNATBIND. 1552 1553 Upper_Half_Encoding : Boolean := False; 1554 -- GNAT, GNATBIND 1555 -- Normally set False, indicating that upper half ISO 8859-1 characters are 1556 -- used in the normal way to represent themselves. If the wide character 1557 -- encoding method uses the upper bit for this encoding, then this flag is 1558 -- set True, and upper half characters in the source indicate the start of 1559 -- a wide character sequence. Set by -gnatW or -W switches. 1560 1561 Use_Include_Path_File : Boolean := False; 1562 -- GNATMAKE, GPRBUILD 1563 -- When True, create a source search path file, even when a mapping file 1564 -- is used. 1565 1566 Usage_Requested : Boolean := False; 1567 -- GNAT, GNATBIND, GNATMAKE 1568 -- Set to True if -h (-gnath for the compiler) switch encountered 1569 -- requesting usage information 1570 1571 Use_Pragma_Linker_Constructor : Boolean := False; 1572 -- GNATBIND 1573 -- True if pragma Linker_Constructor applies to adainit 1574 1575 Use_VADS_Size : Boolean := False; 1576 -- GNAT 1577 -- Set to True if a valid pragma Use_VADS_Size is processed 1578 1579 Validity_Checks_On : Boolean := True; 1580 -- GNAT 1581 -- This flag determines if validity checking is on or off. The initial 1582 -- state is on, and the required default validity checks are active. The 1583 -- actual set of checks that is performed if Validity_Checks_On is set is 1584 -- defined by the switches in package Validsw. The Validity_Checks_On flag 1585 -- is controlled by pragma Validity_Checks (On | Off), and also some 1586 -- generated compiler code (typically code that has to do with validity 1587 -- check generation) is compiled with this flag set to False. This flag is 1588 -- set to False by the -gnatp switch. 1589 1590 Verbose_Mode : Boolean := False; 1591 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN, 1592 -- GPRBUILD, GPRCLEAN 1593 -- Set to True to get verbose mode (full error message text and location 1594 -- information sent to standard output, also header, copyright and summary) 1595 1596 type Verbosity_Level_Type is (None, Low, Medium, High); 1597 pragma Ordered (Verbosity_Level_Type); 1598 Verbosity_Level : Verbosity_Level_Type := High; 1599 -- GNATMAKE 1600 -- Modified by gnatmake switches -v, -vl, -vm, -vh. Indicates 1601 -- the level of verbosity of informational messages: 1602 -- 1603 -- In Low Verbosity, the reasons why a source is recompiled, the name 1604 -- of the executable and the reason it must be rebuilt is output. 1605 -- 1606 -- In Medium Verbosity, additional lines are output for each ALI file 1607 -- that is checked. 1608 -- 1609 -- In High Verbosity, additional lines are output when the ALI file 1610 -- is part of an Ada library, is read-only or is part of the runtime. 1611 1612 Warn_On_Ada_2005_Compatibility : Boolean := True; 1613 -- GNAT 1614 -- Set to True to generate all warnings on Ada 2005 compatibility issues, 1615 -- including warnings on Ada 2005 obsolescent features used in Ada 2005 1616 -- mode. Set by default, modified by use of -gnatwy/Y. 1617 1618 Warn_On_Ada_2012_Compatibility : Boolean := True; 1619 -- GNAT 1620 -- Set to True to generate all warnings on Ada 2012 compatibility issues, 1621 -- including warnings on Ada 2012 obsolescent features used in Ada 2012 1622 -- mode. Modified by use of -gnatwy/Y. 1623 1624 Warn_On_All_Unread_Out_Parameters : Boolean := False; 1625 -- GNAT 1626 -- Set to True to generate warnings in all cases where a variable is 1627 -- modified by being passed as to an OUT formal, but the resulting value is 1628 -- never read. The default is that this warning is suppressed. Modified 1629 -- by use of gnatw.o/.O. 1630 1631 Warn_On_Assertion_Failure : Boolean := True; 1632 -- GNAT 1633 -- Set to True to activate warnings on assertions that can be determined 1634 -- at compile time will always fail. Modified by use of -gnatw.a/.A. 1635 1636 Warn_On_Assumed_Low_Bound : Boolean := True; 1637 -- GNAT 1638 -- Set to True to activate warnings for string parameters that are indexed 1639 -- with literals or S'Length, presumably assuming a lower bound of one. 1640 -- Modified by use of -gnatww/W. 1641 1642 Warn_On_Atomic_Synchronization : Boolean := False; 1643 -- GNAT 1644 -- Set to True to generate information messages for atomic synchronization. 1645 -- Modified by use of -gnatw.n/.N. 1646 1647 Warn_On_Bad_Fixed_Value : Boolean := False; 1648 -- GNAT 1649 -- Set to True to generate warnings for static fixed-point expression 1650 -- values that are not an exact multiple of the small value of the type. 1651 -- Odd by default, modified by use of -gnatwb/B. 1652 1653 Warn_On_Biased_Representation : Boolean := True; 1654 -- GNAT 1655 -- Set to True to generate warnings for size clauses, component clauses 1656 -- and component_size clauses that force biased representation. Modified 1657 -- by use of -gnatw.b/.B. 1658 1659 Warn_On_Constant : Boolean := False; 1660 -- GNAT 1661 -- Set to True to generate warnings for variables that could be declared 1662 -- as constants. Modified by use of -gnatwk/K. 1663 1664 Warn_On_Deleted_Code : Boolean := False; 1665 -- GNAT 1666 -- Set to True to generate warnings for code deleted by the front end 1667 -- for conditional statements whose outcome is known at compile time. 1668 -- Modified by use of -gnatwt/T. 1669 1670 Warn_On_Dereference : Boolean := False; 1671 -- GNAT 1672 -- Set to True to generate warnings for implicit dereferences for array 1673 -- indexing and record component access. Modified by use of -gnatwd/D. 1674 1675 Warn_On_Export_Import : Boolean := True; 1676 -- GNAT 1677 -- Set to True to generate warnings for suspicious use of export or 1678 -- import pragmas. Modified by use of -gnatwx/X. 1679 1680 Warn_On_Elab_Access : Boolean := False; 1681 -- GNAT 1682 -- Set to True to generate warnings for P'Access in the case where 1683 -- subprogram P is in the same package as the P'Access, and the P'Access is 1684 -- evaluated at package elaboration time, and occurs before the body of P 1685 -- has been elaborated. 1686 1687 Warn_On_Hiding : Boolean := False; 1688 -- GNAT 1689 -- Set to True to generate warnings if a declared entity hides another 1690 -- entity. The default is that this warning is suppressed. Modified by 1691 -- use of -gnatwh/H. 1692 1693 Warn_On_Modified_Unread : Boolean := False; 1694 -- GNAT 1695 -- Set to True to generate warnings if a variable is assigned but is never 1696 -- read. Also controls warnings for similar cases involving out parameters, 1697 -- but only if there is only one out parameter for the procedure involved. 1698 -- The default is that this warning is suppressed, modified by use of 1699 -- -gnatwm/M. 1700 1701 Warn_On_No_Value_Assigned : Boolean := True; 1702 -- GNAT 1703 -- Set to True to generate warnings if no value is ever assigned to a 1704 -- variable that is at least partially uninitialized. Set to false to 1705 -- suppress such warnings. The default is that such warnings are enabled. 1706 -- Modified by use of -gnatwv/V. 1707 1708 Warn_On_Non_Local_Exception : Boolean := False; 1709 -- GNAT 1710 -- Set to True to generate warnings for non-local exception raises and also 1711 -- handlers that can never handle a local raise. This warning is only ever 1712 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The 1713 -- default is not to generate the warnings except that if the source has 1714 -- at least one exception handler, and this restriction is set, and the 1715 -- warning was not explicitly turned off, then it is turned on by default. 1716 -- Modified by use of -gnatw.x/.X. 1717 1718 No_Warn_On_Non_Local_Exception : Boolean := False; 1719 -- GNAT 1720 -- This is set to True if the above warning is explicitly suppressed. We 1721 -- use this to avoid turning it on by default when No_Exception_Propagation 1722 -- restriction is set and an exception handler is present. 1723 1724 Warn_On_Object_Renames_Function : Boolean := False; 1725 -- GNAT 1726 -- Set to True to generate warnings when a function result is renamed as 1727 -- an object. The default is that this warning is disabled. Modified by 1728 -- use of -gnatw.r/.R. 1729 1730 Warn_On_Obsolescent_Feature : Boolean := False; 1731 -- GNAT 1732 -- Set to True to generate warnings on use of any feature in Annex or if a 1733 -- subprogram is called for which a pragma Obsolescent applies. Modified 1734 -- by use of -gnatwj/J. 1735 1736 Warn_On_Overlap : Boolean := False; 1737 -- GNAT 1738 -- Set to True to generate warnings when a writable actual overlaps with 1739 -- another actual in a subprogram call. This applies only in modes before 1740 -- Ada 2012. Starting with Ada 2012, such overlaps are illegal. 1741 -- Modified by use of -gnatw.i/.I. 1742 1743 Warn_On_Questionable_Missing_Parens : Boolean := True; 1744 -- GNAT 1745 -- Set to True to generate warnings for cases where parentheses are missing 1746 -- and the usage is questionable, because the intent is unclear. On by 1747 -- default, modified by use of -gnatwq/Q. 1748 1749 Warn_On_Parameter_Order : Boolean := False; 1750 -- GNAT 1751 -- Set to True to generate warnings for cases where the argument list for 1752 -- a call is a sequence of identifiers that match the formal identifiers, 1753 -- but are in the wrong order. 1754 1755 Warn_On_Redundant_Constructs : Boolean := False; 1756 -- GNAT 1757 -- Set to True to generate warnings for redundant constructs (e.g. useless 1758 -- assignments/conversions). The default is that this warning is disabled. 1759 -- Modified by use of -gnatwr/R. 1760 1761 Warn_On_Reverse_Bit_Order : Boolean := True; 1762 -- GNAT 1763 -- Set to True to generate warning (informational) messages for component 1764 -- clauses that are affected by non-standard bit-order. The default is 1765 -- that this warning is enabled. Modified by -gnatw.v/.V. 1766 1767 Warn_On_Suspicious_Contract : Boolean := True; 1768 -- GNAT 1769 -- Set to True to generate warnings for suspicious contracts expressed as 1770 -- pragmas or aspects precondition and postcondition, as well as other 1771 -- suspicious cases of expressions typically found in contracts like 1772 -- quantified expressions and uses of Update attribute. The default is that 1773 -- this warning is enabled. Modified by use of -gnatw.t/.T. 1774 1775 Warn_On_Suspicious_Modulus_Value : Boolean := True; 1776 -- GNAT 1777 -- Set to True to generate warnings for suspicious modulus values. The 1778 -- default is that this warning is enabled. Modified by -gnatw.m/.M. 1779 1780 Warn_On_Unchecked_Conversion : Boolean := True; 1781 -- GNAT 1782 -- Set to True to generate warnings for unchecked conversions that may have 1783 -- non-portable semantics (e.g. because sizes of types differ). Modified 1784 -- by use of -gnatwz/Z. 1785 1786 Warn_On_Unordered_Enumeration_Type : Boolean := False; 1787 -- GNAT 1788 -- Set to True to generate warnings for inappropriate uses (comparisons 1789 -- and explicit ranges) on unordered enumeration types (which includes 1790 -- all enumeration types for which pragma Ordered is not given). The 1791 -- default is that this warning is disabled. Modified by -gnat.u/.U. 1792 1793 Warn_On_Unrecognized_Pragma : Boolean := True; 1794 -- GNAT 1795 -- Set to True to generate warnings for unrecognized pragmas. The default 1796 -- is that this warning is enabled. Modified by use of -gnatwg/G. 1797 1798 Warn_On_Unrepped_Components : Boolean := False; 1799 -- GNAT 1800 -- Set to True to generate warnings for the case of components of record 1801 -- which have a record representation clause but this component does not 1802 -- have a component clause. Modified by use of -gnatw.c/.C. 1803 1804 Warn_On_Warnings_Off : Boolean := False; 1805 -- GNAT 1806 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent), 1807 -- where either the pragma is never used, or it could be replaced by a 1808 -- pragma Unmodified or Unreferenced. Also generates warnings for pragma 1809 -- Warning (Off, string) which either has no matching pragma Warning On, 1810 -- or where no warning has been suppressed by the use of the pragma. 1811 -- Modified by use of -gnatw.w/.W. 1812 1813 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error); 1814 Warning_Mode : Warning_Mode_Type := Normal; 1815 -- GNAT, GNATBIND 1816 -- Controls treatment of warning messages. If set to Suppress, warning 1817 -- messages are not generated at all. In Normal mode, they are generated 1818 -- but do not count as errors. In Treat_As_Error mode, warning messages are 1819 -- generated and are treated as errors. Note that Warning_Mode = Suppress 1820 -- causes pragma Warnings to be ignored (except for legality checks), 1821 -- unless we are in GNATprove_Mode, which requires pragma Warnings to 1822 -- be stored for the formal verification backend. 1823 1824 Warnings_As_Errors_Count : Natural; 1825 -- GNAT 1826 -- Number of entries stored in Warnings_As_Errors table 1827 1828 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets; 1829 -- GNAT, GNATBIND 1830 -- Method used for encoding wide characters in the source program. See 1831 -- description of type in unit System.WCh_Con for a list of the methods 1832 -- that are currently supported. Note that brackets notation is always 1833 -- recognized in source programs regardless of the setting of this 1834 -- variable. The default setting causes only the brackets notation to be 1835 -- recognized. If this is the main unit, this setting also controls the 1836 -- output of the W=? parameter in the ALI file, which is used to provide 1837 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder, 1838 -- the value set here overrides this main unit default. 1839 1840 Wide_Character_Encoding_Method_Specified : Boolean := False; 1841 -- GNAT, GNATBIND 1842 -- Set True if the value in Wide_Character_Encoding_Method was set as 1843 -- a result of an explicit -gnatW? or -W? switch. False otherwise. 1844 1845 Xref_Active : Boolean := True; 1846 -- GNAT 1847 -- Set if cross-referencing is enabled (i.e. xref info in ALI files) 1848 1849 Zero_Formatting : Boolean := False; 1850 -- GNATBIND 1851 -- Do no formatting (no title, no leading spaces, no empty lines) in 1852 -- auxiliary outputs (-e, -K, -l, -R). 1853 1854 ---------------------------- 1855 -- Configuration Settings -- 1856 ---------------------------- 1857 1858 -- These are settings that are used to establish the mode at the start of 1859 -- each unit. The values defined below can be affected either by command 1860 -- line switches, or by the use of appropriate configuration pragmas in a 1861 -- configuration pragma file (but NOT by a local use of a configuration 1862 -- pragma in a single file). 1863 1864 Ada_Version_Config : Ada_Version_Type; 1865 -- GNAT 1866 -- This is the value of the configuration switch for the Ada 83 mode, as 1867 -- set by the command line switches -gnat83/95/2005/2012, and possibly 1868 -- modified by the use of configuration pragmas Ada_*. This switch is used 1869 -- to set the initial value for Ada_Version mode at the start of analysis 1870 -- of a unit. Note however that the setting of this flag is ignored for 1871 -- internal and predefined units (which are always compiled in the most up 1872 -- to date version of Ada). 1873 1874 Ada_Version_Pragma_Config : Node_Id; 1875 -- This will be set non empty if it is set by a configuration pragma 1876 1877 Ada_Version_Explicit_Config : Ada_Version_Type; 1878 -- GNAT 1879 -- This is set in the same manner as Ada_Version_Config. The difference is 1880 -- that the setting of this flag is not ignored for internal and predefined 1881 -- units, which for some purposes do indeed access this value, regardless 1882 -- of the fact that they are compiled the most up to date ada version). 1883 1884 Assertions_Enabled_Config : Boolean; 1885 -- GNAT 1886 -- This is the value of the configuration switch for assertions enabled 1887 -- mode, as possibly set by the command line switch -gnata, and possibly 1888 -- modified by the use of the configuration pragma Assertion_Policy. 1889 1890 Assume_No_Invalid_Values_Config : Boolean; 1891 -- GNAT 1892 -- This is the value of the configuration switch for assuming "no invalid 1893 -- values enabled" mode, as possibly set by the command line switch 1894 -- -gnatB, and possibly modified by the use of the configuration pragma 1895 -- Assume_No_Invalid_Values. 1896 1897 Check_Float_Overflow_Config : Boolean; 1898 -- GNAT 1899 -- Set to True to check that operations on predefined unconstrained float 1900 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 1901 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 1902 -- of the -gnateF switch. 1903 1904 Check_Policy_List_Config : Node_Id; 1905 -- GNAT 1906 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 1907 -- that are linked through the Next_Pragma fields, with the list being 1908 -- terminated by Empty. The order is most recently processed first. This 1909 -- list includes only those pragmas in configuration pragma files. 1910 1911 Default_Pool_Config : Node_Id := Empty; 1912 -- GNAT 1913 -- Same as Default_Pool above, except this is only for Default_Storage_Pool 1914 -- pragmas that are configuration pragmas. 1915 1916 Default_SSO_Config : Character := ' '; 1917 -- GNAT 1918 -- Set if a pragma Default_Scalar_Storage_Order appears as a configuration 1919 -- pragma. A value of ' ' means that no pragma was given, otherwise the 1920 -- value is 'H' for High_Order_First or 'L' for Low_Order_First. 1921 1922 Dynamic_Elaboration_Checks_Config : Boolean := False; 1923 -- GNAT 1924 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 1925 -- switch or by the use of pragma Elaboration_Checking (Dynamic). 1926 1927 Exception_Locations_Suppressed_Config : Boolean := False; 1928 -- GNAT 1929 -- Set True by use of the configuration pragma Suppress_Exception_Messages 1930 1931 Extensions_Allowed_Config : Boolean; 1932 -- GNAT 1933 -- This is the flag that indicates whether extensions are allowed. It can 1934 -- be set True either by use of the -gnatX switch, or by use of the 1935 -- configuration pragma Extensions_Allowed (On). It is always set to True 1936 -- for internal GNAT units, since extensions are always permitted in such 1937 -- units. 1938 1939 External_Name_Exp_Casing_Config : External_Casing_Type; 1940 -- GNAT 1941 -- This is the value of the configuration switch that controls casing of 1942 -- external symbols for which an explicit external name is given. It can be 1943 -- set to Uppercase by the command line switch -gnatF, and further modified 1944 -- by the use of the configuration pragma External_Name_Casing in the 1945 -- gnat.adc file. This flag is used to set the initial value for 1946 -- External_Name_Exp_Casing at the start of analyzing each unit. Note 1947 -- however that the setting of this flag is ignored for internal and 1948 -- predefined units (which are always compiled with As_Is mode). 1949 1950 External_Name_Imp_Casing_Config : External_Casing_Type; 1951 -- GNAT 1952 -- This is the value of the configuration switch that controls casing of 1953 -- external symbols where the external name is implicitly given. It can be 1954 -- set to Uppercase by the command line switch -gnatF, and further modified 1955 -- by the use of the configuration pragma External_Name_Casing in the 1956 -- gnat.adc file. This flag is used to set the initial value for 1957 -- External_Name_Imp_Casing at the start of analyzing each unit. Note 1958 -- however that the setting of this flag is ignored for internal and 1959 -- predefined units (which are always compiled with Lowercase mode). 1960 1961 Fast_Math_Config : Boolean; 1962 -- GNAT 1963 -- This is the value of the configuration switch that controls Fast_Math 1964 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is 1965 -- used to set the initial value of Fast_Math at the start of each new 1966 -- compilation unit. 1967 1968 Initialize_Scalars_Config : Boolean; 1969 -- GNAT 1970 -- This is the value of the configuration switch that is set by the 1971 -- pragma Initialize_Scalars when it appears in the gnat.adc file. 1972 -- This switch is not set when the pragma appears ahead of a given 1973 -- unit, so it does not affect the compilation of other units. 1974 1975 No_Exit_Message : Boolean := False; 1976 -- GNATMAKE, GPRBUILD 1977 -- Set with switch --no-exit-message. When True, if there are compilation 1978 -- failures, the builder does not issue an exit error message. 1979 1980 Optimize_Alignment_Config : Character; 1981 -- GNAT 1982 -- This is the value of the configuration switch that controls the 1983 -- alignment optimization mode, as set by an Optimize_Alignment pragma. 1984 -- It is used to set the initial value of Optimize_Alignment at the start 1985 -- of each new compilation unit, except that it is always set to 'O' (off) 1986 -- for internal units. 1987 1988 Persistent_BSS_Mode_Config : Boolean; 1989 -- GNAT 1990 -- This is the value of the configuration switch that controls whether 1991 -- potentially persistent data is to be placed in the persistent_bss 1992 -- section. It can be set True by use of the pragma Persistent_BSS. 1993 -- This flag is used to set the initial value of Persistent_BSS_Mode 1994 -- at the start of each compilation unit, except that it is always 1995 -- set False for predefined units. 1996 1997 Polling_Required_Config : Boolean; 1998 -- GNAT 1999 -- This is the value of the configuration switch that controls polling 2000 -- mode. It can be set True by the command line switch -gnatP, and then 2001 -- further modified by the use of pragma Polling in the gnat.adc file. This 2002 -- flag is used to set the initial value for Polling_Required at the start 2003 -- of analyzing each unit. 2004 2005 Prefix_Exception_Messages_Config : Boolean; 2006 -- The setting of Prefix_Exception_Messages from configuration pragmas 2007 2008 SPARK_Mode_Config : SPARK_Mode_Type := None; 2009 -- GNAT 2010 -- The setting of SPARK_Mode from configuration pragmas 2011 2012 SPARK_Mode_Pragma_Config : Node_Id := Empty; 2013 -- If a SPARK_Mode pragma appeared in the configuration pragmas (setting 2014 -- SPARK_Mode_Config appropriately), then this points to the N_Pragma node. 2015 2016 Uneval_Old_Config : Character; 2017 -- GNAT 2018 -- The setting of Uneval_Old from configuration pragmas 2019 2020 Use_VADS_Size_Config : Boolean; 2021 -- GNAT 2022 -- This is the value of the configuration switch that controls the use of 2023 -- VADS_Size instead of Size wherever the attribute Size is used. It can 2024 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file. 2025 -- This flag is used to set the initial value for Use_VADS_Size at the 2026 -- start of analyzing each unit. Note however that the setting of this flag 2027 -- is ignored for internal and predefined units (which are always compiled 2028 -- with the standard Size semantics). 2029 2030 Warnings_As_Errors_Count_Config : Natural; 2031 -- GNAT 2032 -- Count of pattern strings stored from Warning_As_Error pragmas 2033 2034 type Config_Switches_Type is private; 2035 -- Type used to save values of the switches set from Config values 2036 2037 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type); 2038 -- This procedure saves the current values of the switches which are 2039 -- initialized from the above Config values, and then resets these switches 2040 -- according to the Config value settings. 2041 2042 procedure Set_Opt_Config_Switches 2043 (Internal_Unit : Boolean; 2044 Main_Unit : Boolean); 2045 -- This procedure sets the switches to the appropriate initial values. The 2046 -- parameter Internal_Unit is True for an internal or predefined unit, and 2047 -- affects the way the switches are set (see above). Main_Unit is true if 2048 -- switches are being set for the main unit or for the spec of the main 2049 -- unit. This affects setting of the assert/debug pragma switches, which 2050 -- are normally set false by default for an internal unit, except when the 2051 -- internal unit is the main unit, in which case we use the command line 2052 -- settings). 2053 2054 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type); 2055 -- This procedure restores a set of switch values previously saved by a 2056 -- call to Save_Opt_Config_Switches (Save). 2057 2058 procedure Register_Opt_Config_Switches; 2059 -- This procedure is called after processing the gnat.adc file and other 2060 -- configuration pragma files to record the values of the Config switches, 2061 -- as possibly modified by the use of command line switches and pragmas 2062 -- appearing in these files. 2063 2064 ------------------------ 2065 -- Other Global Flags -- 2066 ------------------------ 2067 2068 Expander_Active : Boolean := False; 2069 -- A flag that indicates if expansion is active (True) or deactivated 2070 -- (False). When expansion is deactivated all calls to expander routines 2071 -- have no effect. Note that the initial setting of False is merely to 2072 -- prevent saving of an undefined value for an initial call to the 2073 -- Expander_Mode_Save_And_Set procedure. For more information on the use of 2074 -- this flag, see package Expander. Indeed this flag might more logically 2075 -- be in the spec of Expander, but it is referenced by Errout, and it 2076 -- really seems wrong for Errout to depend on Expander. 2077 2078 Static_Dispatch_Tables : Boolean := True; 2079 -- This flag indicates if the backend supports generation of statically 2080 -- allocated dispatch tables. If it is True, then the front end will 2081 -- generate static aggregates for dispatch tables that contain forward 2082 -- references to addresses of subprograms not seen yet, and the back end 2083 -- must be prepared to handle this case. If it is False, then the front 2084 -- end generates assignments to initialize the dispatch table, and there 2085 -- are no such forward references. By default we build statically allocated 2086 -- dispatch tables for all library level tagged types in all platforms.This 2087 -- behavior can be disabled using switch -gnatd.t which will set this flag 2088 -- to False and revert to the previous dynamic behavior. 2089 2090 ----------------------- 2091 -- Tree I/O Routines -- 2092 ----------------------- 2093 2094 procedure Tree_Read; 2095 -- Reads switch settings from current tree file using Tree_Read 2096 2097 procedure Tree_Write; 2098 -- Writes out switch settings to current tree file using Tree_Write 2099 2100 -------------------------- 2101 -- ASIS Version Control -- 2102 -------------------------- 2103 2104 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number) 2105 -- are supposed to be used in the GNAT/ASIS version check performed in 2106 -- the ASIS code (this package is also a part of the ASIS implementation). 2107 -- They are set by Tree_Read procedure, so they represent the version 2108 -- number (and the version string) of the compiler which has created the 2109 -- tree, and they are supposed to be compared with the corresponding values 2110 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS 2111 -- implementation. 2112 2113 Tree_Version_String : String_Access; 2114 -- Used to store the compiler version string read from a tree file to check 2115 -- if it is from the same date as stored in the version string in Gnatvsn. 2116 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow 2117 -- non-Pro ASIS and ASIS-based tools to be used with any version of the 2118 -- GNAT compiler. Therefore, we need the possibility to compare the dates 2119 -- of the corresponding source sets, using version strings that may be 2120 -- of different lengths. 2121 2122 Tree_ASIS_Version_Number : Int; 2123 -- Used to store the ASIS version number read from a tree file to check if 2124 -- it is the same as stored in the ASIS version number in Tree_IO. 2125 2126 ----------------------------------- 2127 -- Modes for Formal Verification -- 2128 ----------------------------------- 2129 2130 GNATprove_Mode : Boolean := False; 2131 -- Specific compiling mode targeting formal verification for those parts 2132 -- of the input code that belong to the SPARK 2014 subset of Ada. Set True 2133 -- by the gnat2why executable or by use of the -gnatd.F debug switch. Note 2134 -- that this is completely separate from the SPARK restriction defined in 2135 -- GNAT to detect violations of a subset of SPARK 2005 rules. 2136 2137 --------------------------- 2138 -- Error/Warning Control -- 2139 --------------------------- 2140 2141 -- The following array would more reasonably be located in Err_Vars or 2142 -- Errour, but but we put them here to deal with licensing issues (we need 2143 -- this to have the GPL exception licensing, since these variables and 2144 -- subprograms are accessed from units with this licensing). 2145 2146 Warnings_As_Errors : array (1 .. 10_000) of String_Ptr; 2147 -- Table for recording Warning_As_Error pragmas as they are processed. 2148 -- It would be nicer to use Table, but there are circular elaboration 2149 -- problems if we try to do this, and an attempt to find some other 2150 -- appropriately licensed unit to declare this as a Table failed with 2151 -- various elaboration circularities. Memory is getting cheap these days! 2152 2153 --------------- 2154 -- GNAT_Mode -- 2155 --------------- 2156 2157 GNAT_Mode : Boolean := False; 2158 -- GNAT 2159 -- True if compiling in GNAT system mode (-gnatg switch) 2160 2161 GNAT_Mode_Config : Boolean := False; 2162 -- GNAT 2163 -- True if -gnatg switch is present. GNAT_Mode may be temporary set to 2164 -- True during the analysis of a system unit, but GNAT_Mode_Config must 2165 -- not change once scanned and set. 2166 2167 -- Setting GNAT mode has the following effects on the language that is 2168 -- accepted. Note that several of the following have the effect of changing 2169 -- an error to a warning. But warnings are usually treated as fatal errors 2170 -- in -gnatg mode, so to actually take advantage of such a change, it is 2171 -- necessary to add an explicit pragma Warnings (Off) in the source and 2172 -- this requires clear documentation of why this is necessary. 2173 2174 -- The identifier character set is set to 'n' (7-bit ASCII) 2175 2176 -- Pragma Extend_System is ignored 2177 2178 -- Warning_Mode is set to Treat_As_Error (-gnatwe) 2179 2180 -- Standard style checks are set (See Set_GNAT_Style_Check_Options) 2181 2182 -- Standard warnings are turned on (see Set_GNAT_Mode_Warnings) 2183 2184 -- The Ada version is set to Ada 2012 2185 2186 -- Task priorities are always allowed to be in the range Any_Priority 2187 2188 -- Overflow checks are suppressed, overflow checking set to strict mode 2189 2190 -- ALI files are always generated for predefined generic packages 2191 2192 -- Obsolescent feature warnings are suppressed 2193 2194 -- Recompilation of children of GNAT, System, Ada, Interfaces is allowed 2195 2196 -- The Scalar_Storage_Order attribute applies to generic types 2197 2198 -- Categorization errors are treated as warnings rather than errors 2199 2200 -- Statements in preelaborated units give warnings rather than errors 2201 2202 -- Private objects are allowed in preelaborated units 2203 2204 -- Non-static constants in preelaborated units give warnings not errors 2205 2206 -- The warning about component size being ignored is suppressed 2207 2208 -- The warning about size clauses being ignored is suppressed 2209 2210 -- Initializing limited types gives a warning rather than an error 2211 2212 -- Copying of limited objects is allowed 2213 2214 -- Returning objects of limited types is allowed 2215 2216 -- Non-static call in preelaborated unit give a warning, not an error 2217 2218 -- Warnings on possible elaboration errors are suppressed 2219 2220 -- Warnings about packing being ignored are suppressed 2221 2222 -- Warnings in internal units are not suppressed (they normally are) 2223 2224 -- The only special comment sequence allowed is --! 2225 2226 -------------------------- 2227 -- Private Declarations -- 2228 -------------------------- 2229 2230private 2231 2232 -- The following type is used to save and restore settings of switches in 2233 -- Opt that represent the configuration (i.e. result of config pragmas). 2234 2235 -- Note that Ada_Version_Explicit is not included, since this is a sticky 2236 -- flag that once set does not get reset, since the whole idea of this flag 2237 -- is to record the setting for the main unit. 2238 2239 type Config_Switches_Type is record 2240 Ada_Version : Ada_Version_Type; 2241 Ada_Version_Explicit : Ada_Version_Type; 2242 Ada_Version_Pragma : Node_Id; 2243 Assertions_Enabled : Boolean; 2244 Assume_No_Invalid_Values : Boolean; 2245 Check_Float_Overflow : Boolean; 2246 Check_Policy_List : Node_Id; 2247 Default_Pool : Node_Id; 2248 Default_SSO : Character; 2249 Dynamic_Elaboration_Checks : Boolean; 2250 Exception_Locations_Suppressed : Boolean; 2251 Extensions_Allowed : Boolean; 2252 External_Name_Exp_Casing : External_Casing_Type; 2253 External_Name_Imp_Casing : External_Casing_Type; 2254 Fast_Math : Boolean; 2255 Initialize_Scalars : Boolean; 2256 Normalize_Scalars : Boolean; 2257 Optimize_Alignment : Character; 2258 Optimize_Alignment_Local : Boolean; 2259 Persistent_BSS_Mode : Boolean; 2260 Polling_Required : Boolean; 2261 Prefix_Exception_Messages : Boolean; 2262 SPARK_Mode : SPARK_Mode_Type; 2263 SPARK_Mode_Pragma : Node_Id; 2264 Uneval_Old : Character; 2265 Use_VADS_Size : Boolean; 2266 Warnings_As_Errors_Count : Natural; 2267 end record; 2268 2269 -- The following declarations are for GCC version dependent flags. We do 2270 -- not let client code in the compiler test GCC_Version directly, but 2271 -- instead use deferred constants for relevant feature tags. 2272 2273 -- Note: there currently are no such constants defined in this section, 2274 -- since the compiler front end is currently entirely independent of the 2275 -- GCC version, which is a desirable state of affairs. 2276 2277 function get_gcc_version return Int; 2278 pragma Import (C, get_gcc_version, "get_gcc_version"); 2279 2280 GCC_Version : constant Nat := get_gcc_version; 2281 -- GNATMAKE 2282 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that 2283 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported. 2284 2285end Opt; 2286