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 -- GNAT, GNATBIND 425 -- The value given to the -g parameter. The default value for -g with 426 -- no value is 2. If no -g is specified, defaults to 0. 427 -- Note that the generated code should never depend on this variable, 428 -- since we want debug info to be nonintrusive on the generate code. 429 430 Default_Exit_Status : Int := 0; 431 -- GNATBIND 432 -- Set the default exit status value. Set by the -Xnnn switch for the 433 -- binder. 434 435 Debug_Generated_Code : Boolean := False; 436 -- GNAT 437 -- Set True (-gnatD switch) to debug generated expanded code instead 438 -- of the original source code. Causes debugging information to be 439 -- written with respect to the generated code file that is written. 440 441 Default_Pool : Node_Id := Empty; 442 -- GNAT 443 -- Used to record the storage pool name (or null literal) that is the 444 -- argument of an applicable pragma Default_Storage_Pool. 445 -- Empty: No pragma Default_Storage_Pool applies. 446 -- N_Null node: "pragma Default_Storage_Pool (null);" applies. 447 -- otherwise: "pragma Default_Storage_Pool (X);" applies, and 448 -- this points to the name X. 449 -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value. 450 Default_Stack_Size : Int := -1; 451 -- GNATBIND 452 -- Set to default primary stack size in units of bytes. Set by 453 -- the -dnnn switch for the binder. A value of -1 indicates that no 454 -- default was set by the binder. 455 456 Default_Sec_Stack_Size : Int := -1; 457 -- GNATBIND 458 -- Set to default secondary stack size in units of bytes. Set by 459 -- the -Dnnn switch for the binder. A value of -1 indicates that no 460 -- default was set by the binder, and that the default should be the 461 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size. 462 463 Default_SSO : Character := ' '; 464 -- GNAT 465 -- Set if a pragma Default_Scalar_Storage_Order has been given. The value 466 -- of ' ' indicates that no default has been set, otherwise the value is 467 -- either 'H' for High_Order_First or 'L' for Lower_Order_First. 468 469 Detect_Blocking : Boolean := False; 470 -- GNAT 471 -- Set True to force the run time to raise Program_Error if calls to 472 -- potentially blocking operations are detected from protected actions. 473 474 Directories_Must_Exist_In_Projects : Boolean := True; 475 -- PROJECT MANAGER 476 -- Set to False with switch -f of gnatclean and gprclean 477 478 Display_Compilation_Progress : Boolean := False; 479 -- GNATMAKE, GPRBUILD 480 -- Set True (-d switch) to display information on progress while compiling 481 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS). 482 483 type Distribution_Stub_Mode_Type is 484 -- GNAT 485 (No_Stubs, 486 -- Normal mode, no generation/compilation of distribution stubs 487 488 Generate_Receiver_Stub_Body, 489 -- The unit being compiled is the RCI body, and the compiler will 490 -- generate the body for the receiver stubs and compile it. 491 492 Generate_Caller_Stub_Body); 493 -- The unit being compiled is the RCI spec, and the compiler will 494 -- generate the body for the caller stubs and compile it. 495 496 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs; 497 -- GNAT 498 -- This enumeration variable indicates the five states of distribution 499 -- annex stub generation/compilation. 500 501 Do_Not_Execute : Boolean := False; 502 -- GNATMAKE 503 -- Set to True if no actual compilations should be undertaken 504 505 Dump_Source_Text : Boolean := False; 506 -- GNAT 507 -- Set to True (by -gnatL) to dump source text intermingled with generated 508 -- code. Effective only if either of Debug/Print_Generated_Code is true. 509 510 Dynamic_Elaboration_Checks : Boolean := False; 511 -- GNAT 512 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 513 -- switch or by the use of pragma Elaboration_Checks (Dynamic). 514 515 Dynamic_Stack_Measurement : Boolean := False; 516 -- GNATBIND 517 -- Set True to enable dynamic stack measurement (-u flag for gnatbind) 518 519 Dynamic_Stack_Measurement_Array_Size : Nat := 100; 520 -- GNATBIND 521 -- Number of measurements we want to store during dynamic stack analysis. 522 -- When the buffer is full, non-storable results will be output on the fly. 523 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set 524 -- by processing of -u flag for gnatbind. 525 526 Elab_Dependency_Output : Boolean := False; 527 -- GNATBIND 528 -- Set to True to output complete list of elaboration constraints 529 530 Elab_Order_Output : Boolean := False; 531 -- GNATBIND 532 -- Set to True to output chosen elaboration order 533 534 Elab_Info_Messages : Boolean := False; 535 -- GNAT 536 -- Set to True to output info messages for static elabmodel (-gnatel) 537 538 Elab_Warnings : Boolean := False; 539 -- GNAT 540 -- Set to True to generate elaboration warnings (-gnatwl) 541 542 Error_Msg_Line_Length : Nat := 0; 543 -- GNAT 544 -- Records the error message line length limit. If this is set to zero, 545 -- then we get the old style behavior, in which each call to the error 546 -- message routines generates one line of output as a separate message. 547 -- If it is set to a non-zero value, then continuation lines are folded 548 -- to make a single long message, and then this message is split up into 549 -- multiple lines not exceeding the specified length. Set by -gnatj=nn. 550 551 Error_To_Warning : Boolean := False; 552 -- GNAT 553 -- If True, then certain error messages (e.g. parameter overlap messages 554 -- for procedure calls in Ada 2012 mode) are treated as warnings instead 555 -- of errors. Set by debug flag -gnatd.E. A search for Error_To_Warning 556 -- will identify affected messages. 557 558 Exception_Handler_Encountered : Boolean := False; 559 -- GNAT 560 -- This flag is set true if the parser encounters an exception handler. 561 -- It is used to set Warn_On_Exception_Propagation True if the restriction 562 -- No_Exception_Propagation is set. 563 564 Exception_Extra_Info : Boolean := False; 565 -- GNAT 566 -- True when switch -gnateE is used. When True, generate extra information 567 -- associated with exception messages (in particular range and index 568 -- checks). 569 570 Exception_Locations_Suppressed : Boolean := False; 571 -- GNAT 572 -- Set to True if a Suppress_Exception_Locations configuration pragma is 573 -- currently active. 574 575 type Exception_Mechanism_Type is 576 -- Determines the kind of mechanism used to handle exceptions 577 -- 578 (Front_End_SJLJ, 579 -- Exceptions use setjmp/longjmp generated explicitly by the front end 580 -- (this includes gigi or other equivalent parts of the code generator). 581 -- AT END handlers are converted into exception handlers by the front 582 -- end in this mode. 583 584 Back_End_ZCX, 585 -- Exceptions are handled by the back end. The front end simply 586 -- generates the handlers as they appear in the source, and AT END 587 -- handlers are left untouched (they are not converted into exception 588 -- handlers when operating in this mode). Propagation is performed 589 -- using a frame unwinding scheme and requires no particular setup code 590 -- at handler sites on regular execution paths. 591 592 Back_End_SJLJ); 593 -- Similar to Back_End_ZCX with respect to the front-end processing 594 -- of regular and AT-END handlers. A setjmp/longjmp scheme is used to 595 -- propagate and setup handler contexts on regular execution paths. 596 597 pragma Convention (C, Exception_Mechanism_Type); 598 599 Exception_Mechanism : Exception_Mechanism_Type := Front_End_SJLJ; 600 -- GNAT 601 -- Set to the appropriate value depending on the flags in system.ads 602 -- (Frontend_Exceptions + ZCX_By_Default). The C convention is there to 603 -- allow access by gigi. 604 605 function Back_End_Exceptions return Boolean; 606 function Front_End_Exceptions return Boolean; 607 function ZCX_Exceptions return Boolean; 608 function SJLJ_Exceptions return Boolean; 609 -- GNAT 610 -- Various properties of the active Exception_Mechanism 611 612 Exception_Tracebacks : Boolean := False; 613 -- GNATBIND 614 -- Set to True to store tracebacks in exception occurrences (-Ea or -E) 615 616 Exception_Tracebacks_Symbolic : Boolean := False; 617 -- GNATBIND 618 -- Set to True to store tracebacks in exception occurrences and enable 619 -- symbolic tracebacks (-Es). 620 621 Extensions_Allowed : Boolean := False; 622 -- GNAT 623 -- Set to True by switch -gnatX if GNAT specific language extensions 624 -- are allowed. Currently there are no such defined extensions. 625 626 type External_Casing_Type is ( 627 As_Is, -- External names cased as they appear in the Ada source 628 Uppercase, -- External names forced to all uppercase letters 629 Lowercase); -- External names forced to all lowercase letters 630 631 External_Name_Imp_Casing : External_Casing_Type := Lowercase; 632 -- GNAT 633 -- The setting of this flag determines the casing of external names 634 -- when the name is implicitly derived from an entity name (i.e. either 635 -- no explicit External_Name or Link_Name argument is used, or, in the 636 -- case of extended DEC pragmas, the external name is given using an 637 -- identifier. The As_Is setting is not permitted here (since this would 638 -- create Ada source programs that were case sensitive). 639 640 External_Name_Exp_Casing : External_Casing_Type := As_Is; 641 -- GNAT 642 -- The setting of this flag determines the casing of an external name 643 -- specified explicitly with a string literal. As_Is means the string 644 -- literal is used as given with no modification to the casing. If 645 -- Lowercase or Uppercase is set, then the string is forced to all 646 -- lowercase or all uppercase letters as appropriate. Note that this 647 -- setting has no effect if the external name is given using an identifier 648 -- in the case of extended DEC import/export pragmas (in this case the 649 -- casing is controlled by External_Name_Imp_Casing), and also has no 650 -- effect if an explicit Link_Name is supplied (a link name is always 651 -- used exactly as given). 652 653 External_Unit_Compilation_Allowed : Boolean := False; 654 -- GNATMAKE 655 -- When True (set by gnatmake switch -x), allow compilation of sources 656 -- that are not part of any project file. 657 658 Fast_Math : Boolean := False; 659 -- GNAT 660 -- Indicates the current setting of Fast_Math mode, as set by the use 661 -- of a Fast_Math pragma (set True by Fast_Math (On)). 662 663 Force_ALI_Tree_File : Boolean := False; 664 -- GNAT 665 -- Force generation of ALI file even if errors are encountered. Also forces 666 -- generation of tree file if -gnatt is also set. Set on by use of -gnatQ. 667 668 Disable_ALI_File : Boolean := False; 669 -- GNAT 670 -- Disable generation of ALI file 671 672 Follow_Links_For_Files : Boolean := False; 673 -- PROJECT MANAGER 674 -- Set to True (-eL) to process the project files in trusted mode. If 675 -- Follow_Links is False, it is assumed that the project doesn't contain 676 -- any file duplicated through symbolic links (although the latter are 677 -- still valid if they point to a file which is outside of the project), 678 -- and that no directory has a name which is a valid source name. 679 680 Follow_Links_For_Dirs : Boolean := False; 681 -- PROJECT MANAGER 682 -- Set to True if directories can be links in this project, and therefore 683 -- additional system calls must be performed to ensure that we always see 684 -- the same full name for each directory. 685 686 Force_Checking_Of_Elaboration_Flags : Boolean := False; 687 -- GNATBIND 688 -- True if binding with forced checking of the elaboration flags 689 -- (-F switch set). 690 691 Force_Compilations : Boolean := False; 692 -- GNATMAKE, GPRBUILD 693 -- Set to force recompilations even when the objects are up-to-date. 694 695 Front_End_Inlining : Boolean := False; 696 -- GNAT 697 -- Set True to activate inlining by front-end expansion (even on GCC 698 -- targets, where inlining is normally handled by the back end). Set by 699 -- the flag -gnatN (which is now considered obsolescent, since the GCC 700 -- back end can do a better job of inlining than the front end these days. 701 702 Full_Path_Name_For_Brief_Errors : Boolean := False; 703 -- PROJECT MANAGER 704 -- When True, in Brief_Output mode, each error message line will start with 705 -- the full path name of the source. When False, only the file name without 706 -- directory information is used. 707 708 Full_List : Boolean := False; 709 -- GNAT 710 -- Set True to generate full source listing with embedded errors 711 712 Full_List_File_Name : String_Ptr := null; 713 -- GNAT 714 -- Set to file name to generate full source listing to named file (or if 715 -- the name is of the form .xxx, then to name.xxx where name is the source 716 -- file name with extension stripped. 717 718 Generate_C_Code : Boolean := False; 719 -- GNAT 720 -- If True, the Cprint circuitry to generate C code output is activated. 721 -- Set True by use of -gnateg or -gnatd.V. 722 723 Generate_CodePeer_Messages : Boolean := False; 724 -- GNAT 725 -- Generate CodePeer messages. Ignored if CodePeer_Mode is false. This is 726 -- turned on by -gnateC. 727 728 Generate_Processed_File : Boolean := False; 729 -- GNAT 730 -- True when switch -gnateG is used. When True, create in a file 731 -- <source>.prep, if the source is preprocessed. 732 733 Generate_SCIL : Boolean := False; 734 -- GNAT 735 -- Set True to activate SCIL code generation. 736 737 Generate_SCO : Boolean := False; 738 -- GNAT 739 -- True when switch -fdump-scos (or -gnateS) is used. When True, Source 740 -- Coverage Obligation (SCO) information is generated and output in the ALI 741 -- file. See unit Par_SCO for full details. 742 743 Generate_SCO_Instance_Table : Boolean := False; 744 -- GNAT 745 -- True when switch -fdump-scos is used. When True, a table of instances is 746 -- included in SCOs. 747 748 Generating_Code : Boolean := False; 749 -- GNAT 750 -- True if the frontend finished its work and has called the backend to 751 -- process the tree and generate the object file. 752 753 type Ghost_Mode_Type is (None, Check, Ignore); 754 -- Possible legal modes that can be set by aspect/pragma Ghost as well as 755 -- value None, which indicates that no such aspect/pragma applies. 756 757 Ghost_Mode : Ghost_Mode_Type := None; 758 -- GNAT 759 -- Current Ghost mode setting 760 761 Global_Discard_Names : Boolean := False; 762 -- GNAT, GNATBIND 763 -- True if a pragma Discard_Names appeared as a configuration pragma for 764 -- the current compilation unit. 765 766 GNAT_Encodings : Int; 767 pragma Import (C, GNAT_Encodings, "gnat_encodings"); 768 -- Constant controlling the balance between GNAT encodings and standard 769 -- DWARF to emit in the debug information. See aamissing.c for definitions 770 -- for the GNAAMP back end. It accepts the following values. 771 772 DWARF_GNAT_Encodings_All : constant Int := 0; 773 DWARF_GNAT_Encodings_GDB : constant Int := 1; 774 DWARF_GNAT_Encodings_Minimal : constant Int := 2; 775 776 Identifier_Character_Set : Character; 777 -- GNAT 778 -- This variable indicates the character set to be used for identifiers. 779 -- The possible settings are: 780 -- '1' Latin-1 (ISO-8859-1) 781 -- '2' Latin-2 (ISO-8859-2) 782 -- '3' Latin-3 (ISO-8859-3) 783 -- '4' Latin-4 (ISO-8859-4) 784 -- '5' Latin-Cyrillic (ISO-8859-5) 785 -- '9' Latin-9 (ISO-8859-15) 786 -- 'p' PC (US, IBM page 437) 787 -- '8' PC (European, IBM page 850) 788 -- 'f' Full upper set (all distinct) 789 -- 'n' No upper characters (Ada 83 rules) 790 -- 'w' Latin-1 plus wide characters allowed in identifiers 791 -- 792 -- The setting affects the set of letters allowed in identifiers and the 793 -- upper/lower case equivalences. It does not affect the interpretation of 794 -- character and string literals, which are always stored using the actual 795 -- coding in the source program. This variable is initialized to the 796 -- default value appropriate to the system (in Osint.Initialize), and then 797 -- reset if a command line switch is used to change the setting. 798 799 Ignore_Pragma_SPARK_Mode : Boolean := False; 800 -- GNAT 801 -- Set True to ignore the semantics and effects of pragma SPARK_Mode when 802 -- the pragma appears inside an instance whose enclosing context is subject 803 -- to SPARK_Mode "off". 804 805 Ignore_Rep_Clauses : Boolean := False; 806 -- GNAT 807 -- Set True to ignore all representation clauses. Useful when compiling 808 -- code from foreign compilers for checking or ASIS purposes. Can be 809 -- set True by use of -gnatI. 810 811 Ignore_Style_Checks_Pragmas : Boolean := False; 812 -- GNAT 813 -- Set True to ignore all Style_Checks pragmas. Can be set True by use 814 -- of -gnateY. 815 816 Ignore_Unrecognized_VWY_Switches : Boolean := False; 817 -- GNAT 818 -- Set True to ignore unrecognized y, V, w switches. Can be set True 819 -- by use of -gnateu, causing subsequent unrecognized switches to result 820 -- in a warning rather than an error. 821 822 Implementation_Unit_Warnings : Boolean := True; 823 -- GNAT 824 -- Set True to active warnings for use of implementation internal units. 825 -- Modified by use of -gnatwi/-gnatwI. 826 827 Implicit_Packing : Boolean := False; 828 -- GNAT 829 -- If set True, then a Size attribute clause on an array is allowed to 830 -- cause implicit packing instead of generating an error message. Set by 831 -- use of pragma Implicit_Packing. 832 833 Ineffective_Inline_Warnings : Boolean := False; 834 -- GNAT 835 -- Set True to activate warnings if front-end inlining (-gnatN) is not able 836 -- to actually inline a particular call (or all calls). Can be controlled 837 -- by use of -gnatwp/-gnatwP. Also set True to activate warnings if 838 -- frontend inlining is not able to inline a subprogram expected to 839 -- be inlined in GNATprove mode. 840 841 Init_Or_Norm_Scalars : Boolean := False; 842 -- GNAT, GNATBIND 843 -- Set True if a pragma Initialize_Scalars applies to the current unit. 844 -- Also set True if a pragma Restriction (Normalize_Scalars) applies. 845 846 Initialize_Scalars : Boolean := False; 847 -- GNAT 848 -- Set True if a pragma Initialize_Scalars applies to the current unit. 849 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 850 851 Initialize_Scalars_Mode1 : Character := 'I'; 852 Initialize_Scalars_Mode2 : Character := 'N'; 853 -- GNATBIND 854 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default 855 -- is IN (invalid values), used if no -S switch is used. 856 857 Inline_Active : Boolean := False; 858 -- GNAT 859 -- Set True to activate pragma Inline processing across modules. Default 860 -- for now is not to inline across module boundaries. 861 862 Inline_Level : Nat := 0; 863 -- GNAT 864 -- Set to indicate the inlining level: 0 means that an appropriate value is 865 -- to be computed by the compiler based on the optimization level (-gnatn), 866 -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full 867 -- inlining across modules (-gnatn2). 868 869 Interface_Library_Unit : Boolean := False; 870 -- GNATBIND 871 -- Set to True to indicate that at least one ALI file is an interface ALI: 872 -- then elaboration flag checks are to be generated in the binder 873 -- generated file. 874 875 Invalid_Value_Used : Boolean := False; 876 -- GNAT 877 -- Set True if a valid Invalid_Value attribute is encountered 878 879 Inline_Processing_Required : Boolean := False; 880 -- GNAT 881 -- Set True if inline processing is required. Inline processing is required 882 -- if an active Inline pragma is processed. The flag is set for a pragma 883 -- Inline or Inline_Always that is actually active. 884 885 In_Place_Mode : Boolean := False; 886 -- GNATMAKE 887 -- Set True to store ALI and object files in place i.e. in the object 888 -- directory if these files already exist or in the source directory 889 -- if not. 890 891 Keep_Going : Boolean := False; 892 -- GNATMAKE, GPRBUILD 893 -- When True signals to ignore compilation errors and keep processing 894 -- sources until there is no more work. 895 896 Keep_Temporary_Files : Boolean := False; 897 -- GNATCMD, GNATMAKE, GPRBUILD 898 -- When True the temporary files are not deleted. Set by switches -dn or 899 -- --keep-temp-files. 900 901 Leap_Seconds_Support : Boolean := False; 902 -- GNATBIND 903 -- Set to True to enable leap seconds support in Ada.Calendar and its 904 -- children. 905 906 Link_Only : Boolean := False; 907 -- GNATMAKE, GPRBUILD 908 -- Set to True to skip compile and bind steps (except when Bind_Only is 909 -- set to True). 910 911 List_Body_Required_Info : Boolean := False; 912 -- GNATMAKE 913 -- List info messages about why a package requires a body. Modified by use 914 -- of -gnatw.y/.Y. 915 916 List_Inherited_Aspects : Boolean := False; 917 -- GNAT 918 -- List inherited invariants, preconditions, and postconditions from 919 -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited 920 -- subtype predicates. Modified by use of -gnatw.l/.L. 921 922 List_Restrictions : Boolean := False; 923 -- GNATBIND 924 -- Set to True to list restrictions pragmas that could apply to partition 925 926 List_Units : Boolean := False; 927 -- GNAT 928 -- List units in the active library for a compilation (-gnatu switch) 929 930 List_Closure : Boolean := False; 931 -- GNATBIND 932 -- List all sources in the closure of a main (-R or -Ra gnatbind switch) 933 934 List_Closure_All : Boolean := False; 935 -- GNATBIND 936 -- List all sources in closure of main including run-time units (-Ra 937 -- gnatbind switch). 938 939 List_Dependencies : Boolean := False; 940 -- GNATMAKE 941 -- When True gnatmake verifies that the objects are up to date and outputs 942 -- the list of object dependencies (-M switch). Output depends if -a switch 943 -- is used or not. This list can be used directly in a Makefile. 944 945 List_Representation_Info : Int range 0 .. 3 := 0; 946 -- GNAT 947 -- Set non-zero by -gnatR switch to list representation information. 948 -- The settings are as follows: 949 -- 950 -- 0 = no listing of representation information (default as above) 951 -- 1 = list rep info for user defined record and array types 952 -- 2 = list rep info for all user defined types and objects 953 -- 3 = like 2, but variable fields are decoded symbolically 954 955 List_Representation_Info_To_File : Boolean := False; 956 -- GNAT 957 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3/m to be 958 -- written to file.rep (where file is the name of the source file) instead 959 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then 960 -- representation info is written to x.adb.ref. 961 962 List_Representation_Info_Mechanisms : Boolean := False; 963 -- GNAT 964 -- Set true by -gnatRm switch. Causes information on mechanisms to be 965 -- included in the representation output information. 966 967 List_Preprocessing_Symbols : Boolean := False; 968 -- GNAT, GNATPREP 969 -- Set to True if symbols for preprocessing a source are to be listed 970 -- before preprocessing occurs. Set to True by switch -s of gnatprep or 971 -- -s in preprocessing data file for the compiler. 972 973 type Create_Repinfo_File_Proc is access procedure (Src : String); 974 type Write_Repinfo_Line_Proc is access procedure (Info : String); 975 type Close_Repinfo_File_Proc is access procedure; 976 -- Types used for procedure addresses below 977 978 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null; 979 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null; 980 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null; 981 -- GNAT 982 -- These three locations are left null when operating in non-compiler (e.g. 983 -- ASIS mode), but when operating in compiler mode, they are set to point 984 -- to the three corresponding procedures in Osint-C. The reason for this 985 -- slightly strange interface is to stop Repinfo from dragging in Osint in 986 -- ASIS mode, which would include lots of unwanted units in the ASIS build. 987 988 type Create_List_File_Proc is access procedure (S : String); 989 type Write_List_Info_Proc is access procedure (S : String); 990 type Close_List_File_Proc is access procedure; 991 -- Types used for procedure addresses below 992 993 Create_List_File_Access : Create_List_File_Proc := null; 994 Write_List_Info_Access : Write_List_Info_Proc := null; 995 Close_List_File_Access : Close_List_File_Proc := null; 996 -- GNAT 997 -- These three locations are left null when operating in non-compiler 998 -- (e.g. from the binder), but when operating in compiler mode, they are 999 -- set to point to the three corresponding procedures in Osint-C. The 1000 -- reason for this slightly strange interface is to prevent Repinfo 1001 -- from dragging in Osint-C in the binder, which would include unwanted 1002 -- units in the binder. 1003 1004 Locking_Policy : Character := ' '; 1005 -- GNAT, GNATBIND 1006 -- Set to ' ' for the default case (no locking policy specified). Reset to 1007 -- first character (uppercase) of locking policy name if a valid pragma 1008 -- Locking_Policy is encountered. 1009 1010 Locking_Policy_Sloc : Source_Ptr := No_Location; 1011 -- GNAT, GNATBIND 1012 -- Remember location of previous Locking_Policy pragma. This is used for 1013 -- inconsistency error messages. A value of System_Location is used if the 1014 -- policy is set in package System. 1015 1016 Look_In_Primary_Dir : Boolean := True; 1017 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN 1018 -- Set to False if a -I- was present on the command line. When True we are 1019 -- allowed to look in the primary directory to locate other source or 1020 -- library files. 1021 1022 Make_Steps : Boolean := False; 1023 -- GNATMAKE 1024 -- Set to True when either Compile_Only, Bind_Only or Link_Only is 1025 -- set to True. 1026 1027 Main_Index : Int := 0; 1028 -- GNATMAKE 1029 -- This is set to non-zero by gnatmake switch -eInnn to indicate that 1030 -- the main program is the nnn unit in a multi-unit source file. 1031 1032 Mapping_File_Name : String_Ptr := null; 1033 -- GNAT 1034 -- File name of mapping between unit names, file names and path names. 1035 -- (given by switch -gnatem) 1036 1037 Maximum_Messages : Int := 9999; 1038 -- GNAT, GNATBIND 1039 -- Maximum default number of errors before compilation is terminated, or in 1040 -- the case of GNAT, maximum number of warnings before further warnings are 1041 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch. 1042 1043 Maximum_File_Name_Length : Int; 1044 -- GNAT, GNATBIND 1045 -- Maximum number of characters allowed in a file name, not counting the 1046 -- extension, as set by the appropriate switch. If no switch is given, 1047 -- then this value is initialized by Osint to the appropriate value. 1048 1049 Maximum_Instantiations : Int := 8000; 1050 -- GNAT 1051 -- Maximum number of instantiations permitted (to stop runaway cases 1052 -- of nested instantiations). These situations probably only occur in 1053 -- specially concocted test cases. Can be modified by -gnateinn switch. 1054 1055 Maximum_Processes : Positive := 1; 1056 -- GNATMAKE, GPRBUILD 1057 -- Maximum number of processes that should be spawned to carry out 1058 -- compilations. 1059 1060 Minimal_Recompilation : Boolean := False; 1061 -- GNATMAKE 1062 -- Set to True if minimal recompilation mode requested 1063 1064 Modify_Tree_For_C : Boolean := False; 1065 -- GNAT 1066 -- If this switch is set True (currently it is set only by -gnatd.V), then 1067 -- certain meaning-preserving transformations are applied to the tree to 1068 -- make it easier to interface with back ends that implement C semantics. 1069 -- There is a section in Sinfo which describes the transformations made. 1070 1071 Multiple_Unit_Index : Int := 0; 1072 -- GNAT 1073 -- This is set non-zero if the current unit is being compiled in multiple 1074 -- unit per file mode, meaning that the current unit is selected from the 1075 -- sequence of units in the current source file, using the value stored 1076 -- in this variable (e.g. 2 = select second unit in file). A value of 1077 -- zero indicates that we are in normal (one unit per file) mode. 1078 1079 No_Backup : Boolean := False; 1080 -- GNATNAME 1081 -- Do not create backup copies of project files. Set by switch --no-backup. 1082 1083 No_Deletion : Boolean := False; 1084 -- GNATPREP 1085 -- Set by preprocessor switch -a. Do not eliminate any source text. Implies 1086 -- Undefined_Symbols_Are_False. Useful to perform a syntax check on all 1087 -- branches of #if constructs. 1088 1089 No_Elab_Code_All_Pragma : Node_Id := Empty; 1090 -- Set to point to a No_Elaboration_Code_All pragma or aspect encountered 1091 -- in the spec of the extended main unit. Used to determine if we need to 1092 -- do special tests for violation of this aspect. 1093 1094 No_Main_Subprogram : Boolean := False; 1095 -- GNATMAKE, GNATBIND 1096 -- Set to True if compilation/binding of a program without main 1097 -- subprogram requested. 1098 1099 No_Run_Time_Mode : Boolean := False; 1100 -- GNAT, GNATBIND 1101 -- This flag is set True if a No_Run_Time pragma is encountered. See spec 1102 -- of Rtsfind for a full description of handling of this pragma. 1103 1104 No_Split_Units : Boolean := False; 1105 -- GPRBUILD 1106 -- Set to True with switch --no-split-units. When True, unit sources, spec, 1107 -- body and subunits, must all be in the same project. This is checked 1108 -- after each compilation. 1109 1110 No_Stdinc : Boolean := False; 1111 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF 1112 -- Set to True if no default source search dirs added to search list. 1113 1114 No_Stdlib : Boolean := False; 1115 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF 1116 -- Set to True if no default library search dirs added to search list. 1117 1118 No_Strict_Aliasing : Boolean := False; 1119 -- GNAT 1120 -- Set True if pragma No_Strict_Aliasing with no parameters encountered. 1121 1122 No_Tagged_Streams : Node_Id := Empty; 1123 -- GNAT 1124 -- If a pragma No_Tagged_Streams is active for the current scope, this 1125 -- points to the corresponding pragma. 1126 1127 Normalize_Scalars : Boolean := False; 1128 -- GNAT, GNATBIND 1129 -- Set True if a pragma Normalize_Scalars applies to the current unit. 1130 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 1131 1132 Object_Directory_Present : Boolean := False; 1133 -- GNATMAKE 1134 -- Set to True when an object directory is specified with option -D 1135 1136 Object_Path_File_Name : String_Ptr := null; 1137 -- GNAT2WHY 1138 -- Path of the temporary file that contains a list of object directories 1139 -- passed by -gnateO=<obj_path_file>. 1140 1141 One_Compilation_Per_Obj_Dir : Boolean := False; 1142 -- GNATMAKE, GPRBUILD 1143 -- Set to True with switch --single-compile-per-obj-dir. When True, there 1144 -- cannot be simultaneous compilations with the object files in the same 1145 -- object directory, if project files are used. 1146 1147 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code); 1148 pragma Ordered (Operating_Mode_Type); 1149 Operating_Mode : Operating_Mode_Type := Generate_Code; 1150 -- GNAT 1151 -- Indicates the operating mode of the compiler. The default is generate 1152 -- code, which runs the parser, semantics and backend. Switches can be 1153 -- used to set syntax checking only mode, or syntax and semantics checking 1154 -- only mode. Operating_Mode can also be modified as a result of detecting 1155 -- errors during the compilation process. In particular if any serious 1156 -- error is detected then this flag is reset from Generate_Code to 1157 -- Check_Semantics after generating an error message. This is an ordered 1158 -- type with the semantics that each value does more than the previous one. 1159 1160 Optimize_Alignment : Character := 'O'; 1161 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can 1162 -- be modified by use of pragma Optimize_Alignment. 1163 1164 Optimize_Alignment_Local : Boolean := False; 1165 -- Set True if Optimize_Alignment mode is set by a local configuration 1166 -- pragma that overrides the gnat.adc (or other configuration file) default 1167 -- so that the unit is not dependent on the default setting. Also always 1168 -- set True for internal units, since these always have a default setting 1169 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to 1170 -- them all having such an explicit pragma in each unit). 1171 1172 Original_Operating_Mode : Operating_Mode_Type := Generate_Code; 1173 -- GNAT 1174 -- Indicates the original operating mode of the compiler as set by compiler 1175 -- options. This is identical to Operating_Mode except that this is not 1176 -- affected by errors. 1177 1178 Optimization_Level : Int; 1179 pragma Import (C, Optimization_Level, "optimize"); 1180 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3) 1181 -- See e.g. aamissing.c for definitions for the GNAAMP back end. 1182 1183 Optimize_Size : Int; 1184 pragma Import (C, Optimize_Size, "optimize_size"); 1185 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero 1186 -- in -Os mode and set to zero otherwise. See aamissing.c for definition 1187 -- of "optimize_size" for the GNAAMP backend. 1188 1189 Output_File_Name_Present : Boolean := False; 1190 -- GNATBIND, GNAT, GNATMAKE 1191 -- Set to True when the output C file name is given with option -o for 1192 -- GNATBIND, when the object file name is given with option -gnatO for GNAT 1193 -- or when the executable is given with option -o for GNATMAKE. 1194 1195 Output_Linker_Option_List : Boolean := False; 1196 -- GNATBIND 1197 -- True if output of list of linker options is requested (-K switch set) 1198 1199 Output_ALI_List : Boolean := False; 1200 ALI_List_Filename : String_Ptr; 1201 -- GNATBIND 1202 -- True if output of list of ALIs is requested (-A switch set). List is 1203 -- output under the given filename, or standard output if not specified. 1204 1205 Output_Object_List : Boolean := False; 1206 Object_List_Filename : String_Ptr; 1207 -- GNATBIND 1208 -- True if output of list of objects is requested (-O switch set). List is 1209 -- output under the given filename, or standard output if not specified. 1210 1211 Partition_Elaboration_Policy : Character := ' '; 1212 -- GNAT, GNATBIND 1213 -- Set to ' ' for the default case (no elaboration policy specified). Reset 1214 -- to first character (uppercase) of locking policy name if a valid pragma 1215 -- Partition_Elaboration_Policy is encountered. 1216 1217 Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location; 1218 -- GNAT, GNATBIND 1219 -- Remember location of previous Partition_Elaboration_Policy pragma. This 1220 -- is used for inconsistency error messages. A value of System_Location is 1221 -- used if the policy is set in package System. 1222 1223 Persistent_BSS_Mode : Boolean := False; 1224 -- GNAT 1225 -- True if a Persistent_BSS configuration pragma is in effect, causing 1226 -- potentially persistent data to be placed in the persistent_bss section. 1227 1228 Pessimistic_Elab_Order : Boolean := False; 1229 -- GNATBIND 1230 -- True if pessimistic elaboration order is to be chosen (-p switch set) 1231 1232 Polling_Required : Boolean := False; 1233 -- GNAT 1234 -- Set to True if polling for asynchronous abort is enabled by using 1235 -- the -gnatP option for GNAT. 1236 1237 Prefix_Exception_Messages : Boolean := False; 1238 -- GNAT 1239 -- Set True to prefix exception messages with entity-name: 1240 1241 Preprocessing_Data_File : String_Ptr := null; 1242 -- GNAT 1243 -- Set by switch -gnatep=. The file name of the preprocessing data file. 1244 1245 Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4); 1246 -- An extensible array to temporarily stores symbol definitions specified 1247 -- on the command line with -gnateD switches. The value 4 is an arbitrary 1248 -- starting point, if more space is needed it is allocated as required. 1249 1250 Preprocessing_Symbol_Last : Natural := 0; 1251 -- Index of last symbol definition in array Symbol_Definitions 1252 1253 Print_Generated_Code : Boolean := False; 1254 -- GNAT 1255 -- Set to True to enable output of generated code in source form. This 1256 -- flag is set by the -gnatG switch. 1257 1258 Print_Standard : Boolean := False; 1259 -- GNAT 1260 -- Set to true to enable printing of package standard in source form. 1261 -- This flag is set by the -gnatS switch 1262 1263 type Usage is (Unknown, Not_In_Use, In_Use); 1264 Project_File_In_Use : Usage := Unknown; 1265 -- GNAT 1266 -- Indicates if a project file is used or not. Set to In_Use by the first 1267 -- SFNP pragma. 1268 1269 Queuing_Policy : Character := ' '; 1270 -- GNAT, GNATBIND 1271 -- Set to ' ' for the default case (no queuing policy specified). Reset to 1272 -- first character (uppercase) of locking policy name if a valid 1273 -- Queuing_Policy pragma is encountered. 1274 1275 Queuing_Policy_Sloc : Source_Ptr := No_Location; 1276 -- GNAT, GNATBIND 1277 -- Remember location of previous Queuing_Policy pragma. This is used for 1278 -- inconsistency error messages. A value of System_Location is used if the 1279 -- policy is set in package System. 1280 1281 Quiet_Output : Boolean := False; 1282 -- GNATMAKE, GNATCLEAN, GPRBUILD, GPRCLEAN 1283 -- Set to True if the tool should not have any output if there are no 1284 -- errors or warnings. 1285 1286 Overriding_Renamings : Boolean := False; 1287 -- GNAT 1288 -- Set to True to enable compatibility mode with Rational compiler, and 1289 -- to accept renamings of implicit operations in their own scope. 1290 1291 Relaxed_RM_Semantics : Boolean := False; 1292 -- GNAT 1293 -- Set to True to ignore some Ada semantic error to help parse legacy Ada 1294 -- code for use in e.g. static analysis (such as CodePeer). This deals 1295 -- with cases where other compilers allow illegal constructs. Tools such as 1296 -- CodePeer are interested in analyzing code rather than enforcing legality 1297 -- rules, so as long as these illegal constructs end up with code that can 1298 -- be handled by the tool in question, there is no reason to reject the 1299 -- code that is considered correct by the other compiler. 1300 1301 Replace_In_Comments : Boolean := False; 1302 -- GNATPREP 1303 -- Set to True if -C switch used. 1304 1305 RTS_Lib_Path_Name : String_Ptr := null; 1306 RTS_Src_Path_Name : String_Ptr := null; 1307 -- GNAT 1308 -- Set to the "adalib" and "adainclude" directories of the run time 1309 -- specified by --RTS=. 1310 1311 RTS_Switch : Boolean := False; 1312 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF 1313 -- Set to True when the --RTS switch is set 1314 1315 Run_Path_Option : Boolean := True; 1316 -- GNATMAKE, GNATLINK 1317 -- Set to False when no run_path_option should be issued to the linker 1318 1319 Search_Directory_Present : Boolean := False; 1320 -- GNAT 1321 -- Set to True when argument is -I. Reset to False when next argument, a 1322 -- search directory path is taken into account. Note that this is quite 1323 -- different from other switches in this section in that it is only set in 1324 -- a transitory manner as a result of scanning a -I switch with no file 1325 -- name, and if set, is an indication that the next argument is to be 1326 -- treated as a file name. 1327 1328 Sec_Stack_Used : Boolean := False; 1329 -- GNAT, GBATBIND 1330 -- Set True if generated code uses the System.Secondary_Stack package. For 1331 -- the binder, set if any unit uses the secondary stack package. 1332 1333 Setup_Projects : Boolean := False; 1334 -- GNAT DRIVER 1335 -- Set to True for GNAT SETUP: the Project Manager creates nonexistent 1336 -- object, library, and exec directories. 1337 1338 Shared_Libgnat : Boolean; 1339 -- GNATBIND 1340 -- Set to True if a shared libgnat is requested by using the -shared option 1341 -- for GNATBIND and to False when using the -static option. The value of 1342 -- this flag is set by Gnatbind.Scan_Bind_Arg. 1343 1344 Short_Circuit_And_Or : Boolean := False; 1345 -- GNAT 1346 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit. 1347 1348 type SPARK_Mode_Type is (None, Off, On); 1349 -- Possible legal modes that can be set by aspect/pragma SPARK_Mode, as 1350 -- well as the value None, which indicates no such pragma/aspect applies. 1351 1352 SPARK_Mode : SPARK_Mode_Type := None; 1353 -- GNAT 1354 -- Current SPARK mode setting. 1355 1356 SPARK_Mode_Pragma : Node_Id := Empty; 1357 -- GNAT 1358 -- If the current SPARK_Mode (above) was set by a pragma, this records 1359 -- the pragma that set this mode. 1360 1361 SPARK_Switches_File_Name : String_Ptr := null; 1362 -- GNAT 1363 -- Set to non-null file name by use of the -gnates switch to specify 1364 -- SPARK (gnat2why) specific switches in the given file name. 1365 1366 Special_Exception_Package_Used : Boolean := False; 1367 -- GNAT 1368 -- Set to True if either of the unit GNAT.Most_Recent_Exception or 1369 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of 1370 -- local raise statements into gotos in the presence of either package. 1371 1372 Sprint_Line_Limit : Nat := 72; 1373 -- GNAT 1374 -- Limit values for chopping long lines in Cprint/Sprint output, can be 1375 -- reset by use of NNN parameter with -gnatG or -gnatD switches. 1376 1377 Stack_Checking_Enabled : Boolean := False; 1378 -- GNAT 1379 -- Set to indicate if stack checking is enabled for the compilation. This 1380 -- is set directly from the value in the gcc back end in the body of the 1381 -- gcc version of back_end.adb. 1382 1383 Style_Check : Boolean := False; 1384 -- GNAT 1385 -- Set True to perform style checks. Activates checks carried out in 1386 -- package Style (see body of this package for details of checks). This 1387 -- flag is set True by use of either the -gnatg or -gnaty switches, or 1388 -- by the Style_Check pragma. 1389 1390 Style_Check_Main : Boolean := False; 1391 -- GNAT 1392 -- Set True if Style_Check was set for the main unit. This is used to 1393 -- enable style checks for units in the main extended source that get 1394 -- with'ed indirectly. It is set True by use of either the -gnatg or 1395 -- -gnaty switches, but not by use of the Style_Checks pragma. 1396 1397 Disable_FE_Inline : Boolean := False; 1398 Disable_FE_Inline_Always : Boolean := False; 1399 -- GNAT 1400 -- Request to disable front end inlining from pragma Inline or pragma 1401 -- Inline_Always out of the presence of the -fno-inline back end flag 1402 -- on the command line, regardless of any other switches that are set. 1403 -- It remains the back end's reponsibility to honor -fno-inline at the 1404 -- back end level. 1405 1406 Suppress_Control_Flow_Optimizations : Boolean := False; 1407 -- GNAT 1408 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations 1409 -- that interfere with coverage analysis based on the object code. 1410 1411 System_Extend_Pragma_Arg : Node_Id := Empty; 1412 -- GNAT 1413 -- Set non-empty if and only if a correct Extend_System pragma was present 1414 -- in which case it points to the argument of the pragma, and the name can 1415 -- be located as Chars (Expression (System_Extend_Pragma_Arg)). 1416 1417 System_Extend_Unit : Node_Id := Empty; 1418 -- GNAT 1419 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System 1420 -- is never appropriate in GNAT_Mode (and causes troubles, including 1421 -- bogus circularities, if we try to compile the run-time library with 1422 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit 1423 -- is a copy of the value set in System_Extend_Pragma_Arg. 1424 1425 Subunits_Missing : Boolean := False; 1426 -- GNAT 1427 -- This flag is set true if missing subunits are detected with code 1428 -- generation active. This causes code generation to be skipped. 1429 1430 Suppress_Checks : Boolean := False; 1431 -- GNAT 1432 -- Set to True if -gnatp (suppress all checks) switch present. 1433 1434 Suppress_Options : Suppress_Record; 1435 -- GNAT 1436 -- Indicates outer level setting of check suppression. This initializes 1437 -- the settings of the outer scope level in any unit compiled. This is 1438 -- initialized by Osint.Initialize, and further initialized by the 1439 -- Adjust_Global_Switches flag in Gnat1drv. 1440 1441 Table_Factor : Int := 1; 1442 -- GNAT 1443 -- Factor by which all initial table sizes set in Alloc are multiplied. 1444 -- Used in Table to calculate initial table sizes (the initial table size 1445 -- is the value in Alloc, used as the Table_Initial parameter value, 1446 -- multiplied by the factor given here. The default value is used if no 1447 -- -gnatT switch appears. 1448 1449 Tagged_Type_Expansion : Boolean := True; 1450 -- GNAT 1451 -- Set True if tagged types and interfaces should be expanded by the 1452 -- front-end. If False, the original tree is left unexpanded for tagged 1453 -- types and dispatching calls, assuming the underlying target supports it. 1454 1455 Target_Dependent_Info_Read_Name : String_Ptr := null; 1456 -- GNAT 1457 -- Set non-null to override the normal processing in Get_Targ and set the 1458 -- necessary information by reading the target dependent information file 1459 -- whose name is given here (see packages Get_Targ and Set_Targ for full 1460 -- details). Set to non-null file name by use of the -gnateT switch. 1461 1462 Target_Dependent_Info_Write_Name : String_Ptr := null; 1463 -- GNAT 1464 -- Set non-null to enable a call to Set_Targ.Write_Target_Dependent_Info 1465 -- which writes a target independent information file (see packages 1466 -- Get_Targ and Set_Targ for full details) using the name given by 1467 -- this switch. Set to non-null file name by use of the -gnatet switch. 1468 1469 type Origin_Of_Target is (Unknown, Default, Specified); 1470 1471 Target_Origin : Origin_Of_Target := Unknown; 1472 -- GPRBUILD 1473 -- Indicates the origin of attribute Target in project files 1474 1475 Target_Value : String_Access := null; 1476 -- GPRBUILD 1477 -- Indicates the value of attribute Target in project files 1478 1479 Task_Dispatching_Policy : Character := ' '; 1480 -- GNAT, GNATBIND 1481 -- Set to ' ' for the default case (no task dispatching policy specified). 1482 -- Reset to first character (uppercase) of task dispatching policy name 1483 -- if a valid Task_Dispatching_Policy pragma is encountered. 1484 1485 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location; 1486 -- GNAT, GNATBIND 1487 -- Remember location of previous Task_Dispatching_Policy pragma. This is 1488 -- used for inconsistency error messages. A value of System_Location is 1489 -- used if the policy is set in package System. 1490 1491 Tasking_Used : Boolean := False; 1492 -- Set True if any tasking construct is encountered. Used to activate the 1493 -- output of the Q, L and T lines in ALI files. 1494 1495 Time_Slice_Set : Boolean := False; 1496 -- GNATBIND 1497 -- Set True if a pragma Time_Slice is processed in the main unit, or 1498 -- if the -gnatTnn switch is present to set a time slice value. 1499 1500 Time_Slice_Value : Nat; 1501 -- GNATBIND 1502 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if 1503 -- Time_Slice pragma has been processed. Set to the time slice value in 1504 -- microseconds. Negative values are stored as zero, and the value is not 1505 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are 1506 -- reset to this maximum. This can also be set with the -gnatTnn switch. 1507 1508 Tolerate_Consistency_Errors : Boolean := False; 1509 -- GNATBIND 1510 -- Tolerate time stamp and other consistency errors. If this flag is set to 1511 -- True (-t), then inconsistencies result in warnings rather than errors. 1512 1513 Treat_Categorization_Errors_As_Warnings : Boolean := False; 1514 -- Normally categorization errors are true illegalities. If this switch 1515 -- is set, then such errors result in warning messages rather than error 1516 -- messages. Set True by -gnateP (P for Pure/Preelaborate). Also set in 1517 -- Relaxed_RM_Semantics mode since some old Ada 83 compilers treated 1518 -- pragma Preelaborate differently. 1519 1520 Treat_Restrictions_As_Warnings : Boolean := False; 1521 -- GNAT 1522 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by 1523 -- -gnatr switch. 1524 1525 Tree_Output : Boolean := False; 1526 -- GNAT 1527 -- Set to True (-gnatt) to generate output tree file 1528 1529 Try_Semantics : Boolean := False; 1530 -- GNAT 1531 -- Flag set to force attempt at semantic analysis, even if parser errors 1532 -- occur. This will probably cause blowups at this stage in the game. On 1533 -- the other hand, most such blowups will be caught cleanly and simply 1534 -- say compilation abandoned. This flag is set True by -gnatq or -gnatQ. 1535 1536 Unchecked_Shared_Lib_Imports : Boolean := False; 1537 -- GPRBUILD 1538 -- Set to True when shared library projects are allowed to import projects 1539 -- that are not shared library projects. Set on by use of the switch 1540 -- --unchecked-shared-lib-imports. 1541 1542 Undefined_Symbols_Are_False : Boolean := False; 1543 -- GNAT, GNATPREP 1544 -- Set to True by switch -u of gnatprep or -u in the preprocessing data 1545 -- file for the compiler. Indicates that while preprocessing sources, 1546 -- symbols that are not defined have the value FALSE. 1547 1548 Uneval_Old : Character := 'E'; 1549 -- GNAT 1550 -- Set to 'E'/'W'/'A' for use of Error/Warn/Allow in a valid pragma 1551 -- Unevaluated_Use_Of_Old. Default in the absence of the pragma is 'E' 1552 -- for the RM default behavior of giving an error. 1553 1554 Unique_Error_Tag : Boolean := Tag_Errors; 1555 -- GNAT 1556 -- Indicates if error messages are to be prefixed by the string error: 1557 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch. 1558 1559 Unnest_Subprogram_Mode : Boolean := False; 1560 -- If true, activates the circuitry for unnesting subprograms (see the spec 1561 -- of Exp_Unst for full details). Currently set only by use of -gnatd.1. 1562 1563 Universal_Addressing_On_AAMP : Boolean := False; 1564 -- GNAAMP 1565 -- Indicates if library-level objects should be accessed and updated using 1566 -- universal addressing instructions on the AAMP architecture. This flag is 1567 -- set to True when pragma Universal_Data is given as a configuration 1568 -- pragma. 1569 1570 Unreserve_All_Interrupts : Boolean := False; 1571 -- GNAT, GNATBIND 1572 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma 1573 -- appears anywhere in the main unit for GNAT, or if any ALI file has the 1574 -- corresponding attribute set in GNATBIND. 1575 1576 Upper_Half_Encoding : Boolean := False; 1577 -- GNAT, GNATBIND 1578 -- Normally set False, indicating that upper half ISO 8859-1 characters are 1579 -- used in the normal way to represent themselves. If the wide character 1580 -- encoding method uses the upper bit for this encoding, then this flag is 1581 -- set True, and upper half characters in the source indicate the start of 1582 -- a wide character sequence. Set by -gnatW or -W switches. 1583 1584 Use_Include_Path_File : Boolean := False; 1585 -- GNATMAKE, GPRBUILD 1586 -- When True, create a source search path file, even when a mapping file 1587 -- is used. 1588 1589 Usage_Requested : Boolean := False; 1590 -- GNAT, GNATBIND, GNATMAKE 1591 -- Set to True if -h (-gnath for the compiler) switch encountered 1592 -- requesting usage information 1593 1594 Use_Pragma_Linker_Constructor : Boolean := False; 1595 -- GNATBIND 1596 -- True if pragma Linker_Constructor applies to adainit 1597 1598 Use_VADS_Size : Boolean := False; 1599 -- GNAT 1600 -- Set to True if a valid pragma Use_VADS_Size is processed 1601 1602 Validity_Checks_On : Boolean := True; 1603 -- GNAT 1604 -- This flag determines if validity checking is on or off. The initial 1605 -- state is on, and the required default validity checks are active. The 1606 -- actual set of checks that is performed if Validity_Checks_On is set is 1607 -- defined by the switches in package Validsw. The Validity_Checks_On flag 1608 -- is controlled by pragma Validity_Checks (On | Off), and also some 1609 -- generated compiler code (typically code that has to do with validity 1610 -- check generation) is compiled with this flag set to False. This flag is 1611 -- set to False by the -gnatp switch. 1612 1613 Verbose_Mode : Boolean := False; 1614 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN, 1615 -- GPRBUILD, GPRCLEAN 1616 -- Set to True to get verbose mode (full error message text and location 1617 -- information sent to standard output, also header, copyright and summary) 1618 1619 type Verbosity_Level_Type is (None, Low, Medium, High); 1620 pragma Ordered (Verbosity_Level_Type); 1621 Verbosity_Level : Verbosity_Level_Type := High; 1622 -- GNATMAKE 1623 -- Modified by gnatmake switches -v, -vl, -vm, -vh. Indicates 1624 -- the level of verbosity of informational messages: 1625 -- 1626 -- In Low Verbosity, the reasons why a source is recompiled, the name 1627 -- of the executable and the reason it must be rebuilt is output. 1628 -- 1629 -- In Medium Verbosity, additional lines are output for each ALI file 1630 -- that is checked. 1631 -- 1632 -- In High Verbosity, additional lines are output when the ALI file 1633 -- is part of an Ada library, is read-only or is part of the runtime. 1634 1635 Warn_On_Ada_2005_Compatibility : Boolean := True; 1636 -- GNAT 1637 -- Set to True to generate all warnings on Ada 2005 compatibility issues, 1638 -- including warnings on Ada 2005 obsolescent features used in Ada 2005 1639 -- mode. Set by default, modified by use of -gnatwy/Y. 1640 1641 Warn_On_Ada_2012_Compatibility : Boolean := True; 1642 -- GNAT 1643 -- Set to True to generate all warnings on Ada 2012 compatibility issues, 1644 -- including warnings on Ada 2012 obsolescent features used in Ada 2012 1645 -- mode. Modified by use of -gnatwy/Y. 1646 1647 Warn_On_All_Unread_Out_Parameters : Boolean := False; 1648 -- GNAT 1649 -- Set to True to generate warnings in all cases where a variable is 1650 -- modified by being passed as to an OUT formal, but the resulting value is 1651 -- never read. The default is that this warning is suppressed. Modified 1652 -- by use of gnatw.o/.O. 1653 1654 Warn_On_Assertion_Failure : Boolean := True; 1655 -- GNAT 1656 -- Set to True to activate warnings on assertions that can be determined 1657 -- at compile time will always fail. Modified by use of -gnatw.a/.A. 1658 1659 Warn_On_Assumed_Low_Bound : Boolean := True; 1660 -- GNAT 1661 -- Set to True to activate warnings for string parameters that are indexed 1662 -- with literals or S'Length, presumably assuming a lower bound of one. 1663 -- Modified by use of -gnatww/W. 1664 1665 Warn_On_Atomic_Synchronization : Boolean := False; 1666 -- GNAT 1667 -- Set to True to generate information messages for atomic synchronization. 1668 -- Modified by use of -gnatw.n/.N. 1669 1670 Warn_On_Bad_Fixed_Value : Boolean := False; 1671 -- GNAT 1672 -- Set to True to generate warnings for static fixed-point expression 1673 -- values that are not an exact multiple of the small value of the type. 1674 -- Odd by default, modified by use of -gnatwb/B. 1675 1676 Warn_On_Biased_Representation : Boolean := True; 1677 -- GNAT 1678 -- Set to True to generate warnings for size clauses, component clauses 1679 -- and component_size clauses that force biased representation. Modified 1680 -- by use of -gnatw.b/.B. 1681 1682 Warn_On_Constant : Boolean := False; 1683 -- GNAT 1684 -- Set to True to generate warnings for variables that could be declared 1685 -- as constants. Modified by use of -gnatwk/K. 1686 1687 Warn_On_Deleted_Code : Boolean := False; 1688 -- GNAT 1689 -- Set to True to generate warnings for code deleted by the front end 1690 -- for conditional statements whose outcome is known at compile time. 1691 -- Modified by use of -gnatwt/T. 1692 1693 Warn_On_Dereference : Boolean := False; 1694 -- GNAT 1695 -- Set to True to generate warnings for implicit dereferences for array 1696 -- indexing and record component access. Modified by use of -gnatwd/D. 1697 1698 Warn_On_Export_Import : Boolean := True; 1699 -- GNAT 1700 -- Set to True to generate warnings for suspicious use of export or 1701 -- import pragmas. Modified by use of -gnatwx/X. 1702 1703 Warn_On_Elab_Access : Boolean := False; 1704 -- GNAT 1705 -- Set to True to generate warnings for P'Access in the case where 1706 -- subprogram P is in the same package as the P'Access, and the P'Access is 1707 -- evaluated at package elaboration time, and occurs before the body of P 1708 -- has been elaborated. 1709 1710 Warn_On_Hiding : Boolean := False; 1711 -- GNAT 1712 -- Set to True to generate warnings if a declared entity hides another 1713 -- entity. The default is that this warning is suppressed. Modified by 1714 -- use of -gnatwh/H. 1715 1716 Warn_On_Modified_Unread : Boolean := False; 1717 -- GNAT 1718 -- Set to True to generate warnings if a variable is assigned but is never 1719 -- read. Also controls warnings for similar cases involving out parameters, 1720 -- but only if there is only one out parameter for the procedure involved. 1721 -- The default is that this warning is suppressed, modified by use of 1722 -- -gnatwm/M. 1723 1724 Warn_On_No_Value_Assigned : Boolean := True; 1725 -- GNAT 1726 -- Set to True to generate warnings if no value is ever assigned to a 1727 -- variable that is at least partially uninitialized. Set to false to 1728 -- suppress such warnings. The default is that such warnings are enabled. 1729 -- Modified by use of -gnatwv/V. 1730 1731 Warn_On_Non_Local_Exception : Boolean := False; 1732 -- GNAT 1733 -- Set to True to generate warnings for non-local exception raises and also 1734 -- handlers that can never handle a local raise. This warning is only ever 1735 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The 1736 -- default is not to generate the warnings except that if the source has 1737 -- at least one exception handler, and this restriction is set, and the 1738 -- warning was not explicitly turned off, then it is turned on by default. 1739 -- Modified by use of -gnatw.x/.X. 1740 1741 No_Warn_On_Non_Local_Exception : Boolean := False; 1742 -- GNAT 1743 -- This is set to True if the above warning is explicitly suppressed. We 1744 -- use this to avoid turning it on by default when No_Exception_Propagation 1745 -- restriction is set and an exception handler is present. 1746 1747 Warn_On_Object_Renames_Function : Boolean := False; 1748 -- GNAT 1749 -- Set to True to generate warnings when a function result is renamed as 1750 -- an object. The default is that this warning is disabled. Modified by 1751 -- use of -gnatw.r/.R. 1752 1753 Warn_On_Obsolescent_Feature : Boolean := False; 1754 -- GNAT 1755 -- Set to True to generate warnings on use of any feature in Annex or if a 1756 -- subprogram is called for which a pragma Obsolescent applies. Modified 1757 -- by use of -gnatwj/J. 1758 1759 Warn_On_Overlap : Boolean := False; 1760 -- GNAT 1761 -- Set to True to generate warnings when a writable actual overlaps with 1762 -- another actual in a subprogram call. This applies only in modes before 1763 -- Ada 2012. Starting with Ada 2012, such overlaps are illegal. 1764 -- Modified by use of -gnatw.i/.I. 1765 1766 Warn_On_Questionable_Missing_Parens : Boolean := True; 1767 -- GNAT 1768 -- Set to True to generate warnings for cases where parentheses are missing 1769 -- and the usage is questionable, because the intent is unclear. On by 1770 -- default, modified by use of -gnatwq/Q. 1771 1772 Warn_On_Parameter_Order : Boolean := False; 1773 -- GNAT 1774 -- Set to True to generate warnings for cases where the argument list for 1775 -- a call is a sequence of identifiers that match the formal identifiers, 1776 -- but are in the wrong order. 1777 1778 Warn_On_Redundant_Constructs : Boolean := False; 1779 -- GNAT 1780 -- Set to True to generate warnings for redundant constructs (e.g. useless 1781 -- assignments/conversions). The default is that this warning is disabled. 1782 -- Modified by use of -gnatwr/R. 1783 1784 Warn_On_Reverse_Bit_Order : Boolean := True; 1785 -- GNAT 1786 -- Set to True to generate warning (informational) messages for component 1787 -- clauses that are affected by non-standard bit-order. The default is 1788 -- that this warning is enabled. Modified by -gnatw.v/.V. 1789 1790 Warn_On_Suspicious_Contract : Boolean := True; 1791 -- GNAT 1792 -- Set to True to generate warnings for suspicious contracts expressed as 1793 -- pragmas or aspects precondition and postcondition, as well as other 1794 -- suspicious cases of expressions typically found in contracts like 1795 -- quantified expressions and uses of Update attribute. The default is that 1796 -- this warning is enabled. Modified by use of -gnatw.t/.T. 1797 1798 Warn_On_Suspicious_Modulus_Value : Boolean := True; 1799 -- GNAT 1800 -- Set to True to generate warnings for suspicious modulus values. The 1801 -- default is that this warning is enabled. Modified by -gnatw.m/.M. 1802 1803 Warn_On_Unchecked_Conversion : Boolean := True; 1804 -- GNAT 1805 -- Set to True to generate warnings for unchecked conversions that may have 1806 -- non-portable semantics (e.g. because sizes of types differ). Modified 1807 -- by use of -gnatwz/Z. 1808 1809 Warn_On_Unordered_Enumeration_Type : Boolean := False; 1810 -- GNAT 1811 -- Set to True to generate warnings for inappropriate uses (comparisons 1812 -- and explicit ranges) on unordered enumeration types (which includes 1813 -- all enumeration types for which pragma Ordered is not given). The 1814 -- default is that this warning is disabled. Modified by -gnat.u/.U. 1815 1816 Warn_On_Unrecognized_Pragma : Boolean := True; 1817 -- GNAT 1818 -- Set to True to generate warnings for unrecognized pragmas. The default 1819 -- is that this warning is enabled. Modified by use of -gnatwg/G. 1820 1821 Warn_On_Unrepped_Components : Boolean := False; 1822 -- GNAT 1823 -- Set to True to generate warnings for the case of components of record 1824 -- which have a record representation clause but this component does not 1825 -- have a component clause. Modified by use of -gnatw.c/.C. 1826 1827 Warn_On_Warnings_Off : Boolean := False; 1828 -- GNAT 1829 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent), 1830 -- where either the pragma is never used, or it could be replaced by a 1831 -- pragma Unmodified or Unreferenced. Also generates warnings for pragma 1832 -- Warning (Off, string) which either has no matching pragma Warning On, 1833 -- or where no warning has been suppressed by the use of the pragma. 1834 -- Modified by use of -gnatw.w/.W. 1835 1836 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error); 1837 Warning_Mode : Warning_Mode_Type := Normal; 1838 -- GNAT, GNATBIND 1839 -- Controls treatment of warning messages. If set to Suppress, warning 1840 -- messages are not generated at all. In Normal mode, they are generated 1841 -- but do not count as errors. In Treat_As_Error mode, warning messages are 1842 -- generated and are treated as errors. Note that Warning_Mode = Suppress 1843 -- causes pragma Warnings to be ignored (except for legality checks), 1844 -- unless we are in GNATprove_Mode, which requires pragma Warnings to 1845 -- be stored for the formal verification backend. 1846 1847 Warnings_As_Errors_Count : Natural; 1848 -- GNAT 1849 -- Number of entries stored in Warnings_As_Errors table 1850 1851 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets; 1852 -- GNAT, GNATBIND 1853 -- Method used for encoding wide characters in the source program. See 1854 -- description of type in unit System.WCh_Con for a list of the methods 1855 -- that are currently supported. Note that brackets notation is always 1856 -- recognized in source programs regardless of the setting of this 1857 -- variable. The default setting causes only the brackets notation to be 1858 -- recognized. If this is the main unit, this setting also controls the 1859 -- output of the W=? parameter in the ALI file, which is used to provide 1860 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder, 1861 -- the value set here overrides this main unit default. 1862 1863 Wide_Character_Encoding_Method_Specified : Boolean := False; 1864 -- GNAT, GNATBIND 1865 -- Set True if the value in Wide_Character_Encoding_Method was set as 1866 -- a result of an explicit -gnatW? or -W? switch. False otherwise. 1867 1868 Xref_Active : Boolean := True; 1869 -- GNAT 1870 -- Set if cross-referencing is enabled (i.e. xref info in ALI files) 1871 1872 Zero_Formatting : Boolean := False; 1873 -- GNATBIND 1874 -- Do no formatting (no title, no leading spaces, no empty lines) in 1875 -- auxiliary outputs (-e, -K, -l, -R). 1876 1877 ---------------------------- 1878 -- Configuration Settings -- 1879 ---------------------------- 1880 1881 -- These are settings that are used to establish the mode at the start of 1882 -- each unit. The values defined below can be affected either by command 1883 -- line switches, or by the use of appropriate configuration pragmas in a 1884 -- configuration pragma file (but NOT by a local use of a configuration 1885 -- pragma in a single file). 1886 1887 Ada_Version_Config : Ada_Version_Type; 1888 -- GNAT 1889 -- This is the value of the configuration switch for the Ada 83 mode, as 1890 -- set by the command line switches -gnat83/95/2005/2012, and possibly 1891 -- modified by the use of configuration pragmas Ada_*. This switch is used 1892 -- to set the initial value for Ada_Version mode at the start of analysis 1893 -- of a unit. Note however that the setting of this flag is ignored for 1894 -- internal and predefined units (which are always compiled in the most up 1895 -- to date version of Ada). 1896 1897 Ada_Version_Pragma_Config : Node_Id; 1898 -- This will be set nonempty if it is set by a configuration pragma 1899 1900 Ada_Version_Explicit_Config : Ada_Version_Type; 1901 -- GNAT 1902 -- This is set in the same manner as Ada_Version_Config. The difference is 1903 -- that the setting of this flag is not ignored for internal and predefined 1904 -- units, which for some purposes do indeed access this value, regardless 1905 -- of the fact that they are compiled the most up to date ada version). 1906 1907 Assertions_Enabled_Config : Boolean; 1908 -- GNAT 1909 -- This is the value of the configuration switch for assertions enabled 1910 -- mode, as possibly set by the command line switch -gnata, and possibly 1911 -- modified by the use of the configuration pragma Assertion_Policy. 1912 1913 Assume_No_Invalid_Values_Config : Boolean; 1914 -- GNAT 1915 -- This is the value of the configuration switch for assuming "no invalid 1916 -- values enabled" mode, as possibly set by the command line switch 1917 -- -gnatB, and possibly modified by the use of the configuration pragma 1918 -- Assume_No_Invalid_Values. 1919 1920 Check_Float_Overflow_Config : Boolean; 1921 -- GNAT 1922 -- Set to True to check that operations on predefined unconstrained float 1923 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 1924 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 1925 -- of the -gnateF switch. 1926 1927 Check_Policy_List_Config : Node_Id; 1928 -- GNAT 1929 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 1930 -- that are linked through the Next_Pragma fields, with the list being 1931 -- terminated by Empty. The order is most recently processed first. This 1932 -- list includes only those pragmas in configuration pragma files. 1933 1934 Default_Pool_Config : Node_Id := Empty; 1935 -- GNAT 1936 -- Same as Default_Pool above, except this is only for Default_Storage_Pool 1937 -- pragmas that are configuration pragmas. 1938 1939 Default_SSO_Config : Character := ' '; 1940 -- GNAT 1941 -- Set if a pragma Default_Scalar_Storage_Order appears as a configuration 1942 -- pragma. A value of ' ' means that no pragma was given, otherwise the 1943 -- value is 'H' for High_Order_First or 'L' for Low_Order_First. 1944 1945 Dynamic_Elaboration_Checks_Config : Boolean := False; 1946 -- GNAT 1947 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 1948 -- switch or by the use of pragma Elaboration_Checking (Dynamic). 1949 1950 Exception_Locations_Suppressed_Config : Boolean := False; 1951 -- GNAT 1952 -- Set True by use of the configuration pragma Suppress_Exception_Messages 1953 1954 Extensions_Allowed_Config : Boolean; 1955 -- GNAT 1956 -- This is the flag that indicates whether extensions are allowed. It can 1957 -- be set True either by use of the -gnatX switch, or by use of the 1958 -- configuration pragma Extensions_Allowed (On). It is always set to True 1959 -- for internal GNAT units, since extensions are always permitted in such 1960 -- units. 1961 1962 External_Name_Exp_Casing_Config : External_Casing_Type; 1963 -- GNAT 1964 -- This is the value of the configuration switch that controls casing of 1965 -- external symbols for which an explicit external name is given. It can be 1966 -- set to Uppercase by the command line switch -gnatF, and further modified 1967 -- by the use of the configuration pragma External_Name_Casing in the 1968 -- gnat.adc file. This flag is used to set the initial value for 1969 -- External_Name_Exp_Casing at the start of analyzing each unit. Note 1970 -- however that the setting of this flag is ignored for internal and 1971 -- predefined units (which are always compiled with As_Is mode). 1972 1973 External_Name_Imp_Casing_Config : External_Casing_Type; 1974 -- GNAT 1975 -- This is the value of the configuration switch that controls casing of 1976 -- external symbols where the external name is implicitly given. It can be 1977 -- set to Uppercase by the command line switch -gnatF, and further modified 1978 -- by the use of the configuration pragma External_Name_Casing in the 1979 -- gnat.adc file. This flag is used to set the initial value for 1980 -- External_Name_Imp_Casing at the start of analyzing each unit. Note 1981 -- however that the setting of this flag is ignored for internal and 1982 -- predefined units (which are always compiled with Lowercase mode). 1983 1984 Fast_Math_Config : Boolean; 1985 -- GNAT 1986 -- This is the value of the configuration switch that controls Fast_Math 1987 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is 1988 -- used to set the initial value of Fast_Math at the start of each new 1989 -- compilation unit. 1990 1991 Initialize_Scalars_Config : Boolean; 1992 -- GNAT 1993 -- This is the value of the configuration switch that is set by the 1994 -- pragma Initialize_Scalars when it appears in the gnat.adc file. 1995 -- This switch is not set when the pragma appears ahead of a given 1996 -- unit, so it does not affect the compilation of other units. 1997 1998 No_Exit_Message : Boolean := False; 1999 -- GNATMAKE, GPRBUILD 2000 -- Set with switch --no-exit-message. When True, if there are compilation 2001 -- failures, the builder does not issue an exit error message. 2002 2003 Optimize_Alignment_Config : Character; 2004 -- GNAT 2005 -- This is the value of the configuration switch that controls the 2006 -- alignment optimization mode, as set by an Optimize_Alignment pragma. 2007 -- It is used to set the initial value of Optimize_Alignment at the start 2008 -- of each new compilation unit, except that it is always set to 'O' (off) 2009 -- for internal units. 2010 2011 Persistent_BSS_Mode_Config : Boolean; 2012 -- GNAT 2013 -- This is the value of the configuration switch that controls whether 2014 -- potentially persistent data is to be placed in the persistent_bss 2015 -- section. It can be set True by use of the pragma Persistent_BSS. 2016 -- This flag is used to set the initial value of Persistent_BSS_Mode 2017 -- at the start of each compilation unit, except that it is always 2018 -- set False for predefined units. 2019 2020 Polling_Required_Config : Boolean; 2021 -- GNAT 2022 -- This is the value of the configuration switch that controls polling 2023 -- mode. It can be set True by the command line switch -gnatP, and then 2024 -- further modified by the use of pragma Polling in the gnat.adc file. This 2025 -- flag is used to set the initial value for Polling_Required at the start 2026 -- of analyzing each unit. 2027 2028 Prefix_Exception_Messages_Config : Boolean; 2029 -- The setting of Prefix_Exception_Messages from configuration pragmas 2030 2031 SPARK_Mode_Config : SPARK_Mode_Type := None; 2032 -- GNAT 2033 -- The setting of SPARK_Mode from configuration pragmas 2034 2035 SPARK_Mode_Pragma_Config : Node_Id := Empty; 2036 -- If a SPARK_Mode pragma appeared in the configuration pragmas (setting 2037 -- SPARK_Mode_Config appropriately), then this points to the N_Pragma node. 2038 2039 Uneval_Old_Config : Character; 2040 -- GNAT 2041 -- The setting of Uneval_Old from configuration pragmas 2042 2043 Use_VADS_Size_Config : Boolean; 2044 -- GNAT 2045 -- This is the value of the configuration switch that controls the use of 2046 -- VADS_Size instead of Size wherever the attribute Size is used. It can 2047 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file. 2048 -- This flag is used to set the initial value for Use_VADS_Size at the 2049 -- start of analyzing each unit. Note however that the setting of this flag 2050 -- is ignored for internal and predefined units (which are always compiled 2051 -- with the standard Size semantics). 2052 2053 Warnings_As_Errors_Count_Config : Natural; 2054 -- GNAT 2055 -- Count of pattern strings stored from Warning_As_Error pragmas 2056 2057 type Config_Switches_Type is private; 2058 -- Type used to save values of the switches set from Config values 2059 2060 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type); 2061 -- This procedure saves the current values of the switches which are 2062 -- initialized from the above Config values, and then resets these switches 2063 -- according to the Config value settings. 2064 2065 procedure Set_Opt_Config_Switches 2066 (Internal_Unit : Boolean; 2067 Main_Unit : Boolean); 2068 -- This procedure sets the switches to the appropriate initial values. The 2069 -- parameter Internal_Unit is True for an internal or predefined unit, and 2070 -- affects the way the switches are set (see above). Main_Unit is true if 2071 -- switches are being set for the main unit or for the spec of the main 2072 -- unit. This affects setting of the assert/debug pragma switches, which 2073 -- are normally set false by default for an internal unit, except when the 2074 -- internal unit is the main unit, in which case we use the command line 2075 -- settings. 2076 2077 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type); 2078 -- This procedure restores a set of switch values previously saved by a 2079 -- call to Save_Opt_Config_Switches (Save). 2080 2081 procedure Register_Opt_Config_Switches; 2082 -- This procedure is called after processing the gnat.adc file and other 2083 -- configuration pragma files to record the values of the Config switches, 2084 -- as possibly modified by the use of command line switches and pragmas 2085 -- appearing in these files. 2086 2087 ------------------------ 2088 -- Other Global Flags -- 2089 ------------------------ 2090 2091 Expander_Active : Boolean := False; 2092 -- A flag that indicates if expansion is active (True) or deactivated 2093 -- (False). When expansion is deactivated all calls to expander routines 2094 -- have no effect. Note that the initial setting of False is merely to 2095 -- prevent saving of an undefined value for an initial call to the 2096 -- Expander_Mode_Save_And_Set procedure. For more information on the use of 2097 -- this flag, see package Expander. Indeed this flag might more logically 2098 -- be in the spec of Expander, but it is referenced by Errout, and it 2099 -- really seems wrong for Errout to depend on Expander. 2100 2101 Static_Dispatch_Tables : Boolean := True; 2102 -- This flag indicates if the backend supports generation of statically 2103 -- allocated dispatch tables. If it is True, then the front end will 2104 -- generate static aggregates for dispatch tables that contain forward 2105 -- references to addresses of subprograms not seen yet, and the back end 2106 -- must be prepared to handle this case. If it is False, then the front 2107 -- end generates assignments to initialize the dispatch table, and there 2108 -- are no such forward references. By default we build statically allocated 2109 -- dispatch tables for all library level tagged types in all platforms.This 2110 -- behavior can be disabled using switch -gnatd.t which will set this flag 2111 -- to False and revert to the previous dynamic behavior. 2112 2113 ----------------------- 2114 -- Tree I/O Routines -- 2115 ----------------------- 2116 2117 procedure Tree_Read; 2118 -- Reads switch settings from current tree file using Tree_Read 2119 2120 procedure Tree_Write; 2121 -- Writes out switch settings to current tree file using Tree_Write 2122 2123 -------------------------- 2124 -- ASIS Version Control -- 2125 -------------------------- 2126 2127 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number) 2128 -- are supposed to be used in the GNAT/ASIS version check performed in 2129 -- the ASIS code (this package is also a part of the ASIS implementation). 2130 -- They are set by Tree_Read procedure, so they represent the version 2131 -- number (and the version string) of the compiler which has created the 2132 -- tree, and they are supposed to be compared with the corresponding values 2133 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS 2134 -- implementation. 2135 2136 Tree_Version_String : String_Access; 2137 -- Used to store the compiler version string read from a tree file to check 2138 -- if it is from the same date as stored in the version string in Gnatvsn. 2139 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow 2140 -- non-Pro ASIS and ASIS-based tools to be used with any version of the 2141 -- GNAT compiler. Therefore, we need the possibility to compare the dates 2142 -- of the corresponding source sets, using version strings that may be 2143 -- of different lengths. 2144 2145 Tree_ASIS_Version_Number : Int; 2146 -- Used to store the ASIS version number read from a tree file to check if 2147 -- it is the same as stored in the ASIS version number in Tree_IO. 2148 2149 ----------------------------------- 2150 -- Modes for Formal Verification -- 2151 ----------------------------------- 2152 2153 GNATprove_Mode : Boolean := False; 2154 -- Specific compiling mode targeting formal verification for those parts 2155 -- of the input code that belong to the SPARK 2014 subset of Ada. Set True 2156 -- by the gnat2why executable or by use of the -gnatd.F debug switch. Note 2157 -- that this is completely separate from the SPARK restriction defined in 2158 -- GNAT to detect violations of a subset of SPARK 2005 rules. 2159 2160 --------------------------- 2161 -- Error/Warning Control -- 2162 --------------------------- 2163 2164 -- The following array would more reasonably be located in Err_Vars or 2165 -- Errour, but we put them here to deal with licensing issues (we need 2166 -- this to have the GPL exception licensing, since these variables and 2167 -- subprograms are accessed from units with this licensing). 2168 2169 Warnings_As_Errors : array (1 .. 10_000) of String_Ptr; 2170 -- Table for recording Warning_As_Error pragmas as they are processed. 2171 -- It would be nicer to use Table, but there are circular elaboration 2172 -- problems if we try to do this, and an attempt to find some other 2173 -- appropriately licensed unit to declare this as a Table failed with 2174 -- various elaboration circularities. Memory is getting cheap these days! 2175 2176 --------------- 2177 -- GNAT_Mode -- 2178 --------------- 2179 2180 GNAT_Mode : Boolean := False; 2181 -- GNAT 2182 -- True if compiling in GNAT system mode (-gnatg switch) 2183 2184 GNAT_Mode_Config : Boolean := False; 2185 -- GNAT 2186 -- True if -gnatg switch is present. GNAT_Mode may be temporary set to 2187 -- True during the analysis of a system unit, but GNAT_Mode_Config must 2188 -- not change once scanned and set. 2189 2190 -- Setting GNAT mode has the following effects on the language that is 2191 -- accepted. Note that several of the following have the effect of changing 2192 -- an error to a warning. But warnings are usually treated as fatal errors 2193 -- in -gnatg mode, so to actually take advantage of such a change, it is 2194 -- necessary to add an explicit pragma Warnings (Off) in the source and 2195 -- this requires clear documentation of why this is necessary. 2196 2197 -- The identifier character set is set to 'n' (7-bit ASCII) 2198 2199 -- Pragma Extend_System is ignored 2200 2201 -- Warning_Mode is set to Treat_As_Error (-gnatwe) 2202 2203 -- Standard style checks are set (See Set_GNAT_Style_Check_Options) 2204 2205 -- Standard warnings are turned on (see Set_GNAT_Mode_Warnings) 2206 2207 -- The Ada version is set to Ada 2012 2208 2209 -- Task priorities are always allowed to be in the range Any_Priority 2210 2211 -- Overflow checks are suppressed, overflow checking set to strict mode 2212 2213 -- ALI files are always generated for predefined generic packages 2214 2215 -- Obsolescent feature warnings are suppressed 2216 2217 -- Recompilation of children of GNAT, System, Ada, Interfaces is allowed 2218 2219 -- The Scalar_Storage_Order attribute applies to generic types 2220 2221 -- Categorization errors are treated as warnings rather than errors 2222 2223 -- Statements in preelaborated units give warnings rather than errors 2224 2225 -- Private objects are allowed in preelaborated units 2226 2227 -- Non-static constants in preelaborated units give warnings not errors 2228 2229 -- The warning about component size being ignored is suppressed 2230 2231 -- The warning about size clauses being ignored is suppressed 2232 2233 -- Initializing limited types gives a warning rather than an error 2234 2235 -- Copying of limited objects is allowed 2236 2237 -- Returning objects of limited types is allowed 2238 2239 -- Non-static call in preelaborated unit give a warning, not an error 2240 2241 -- Warnings on possible elaboration errors are suppressed 2242 2243 -- Warnings about packing being ignored are suppressed 2244 2245 -- Warnings in internal units are not suppressed (they normally are) 2246 2247 -- The only special comment sequence allowed is --! 2248 2249 -------------------------- 2250 -- Private Declarations -- 2251 -------------------------- 2252 2253private 2254 2255 -- The following type is used to save and restore settings of switches in 2256 -- Opt that represent the configuration (i.e. result of config pragmas). 2257 2258 -- Note that Ada_Version_Explicit is not included, since this is a sticky 2259 -- flag that once set does not get reset, since the whole idea of this flag 2260 -- is to record the setting for the main unit. 2261 2262 type Config_Switches_Type is record 2263 Ada_Version : Ada_Version_Type; 2264 Ada_Version_Explicit : Ada_Version_Type; 2265 Ada_Version_Pragma : Node_Id; 2266 Assertions_Enabled : Boolean; 2267 Assume_No_Invalid_Values : Boolean; 2268 Check_Float_Overflow : Boolean; 2269 Check_Policy_List : Node_Id; 2270 Default_Pool : Node_Id; 2271 Default_SSO : Character; 2272 Dynamic_Elaboration_Checks : Boolean; 2273 Exception_Locations_Suppressed : Boolean; 2274 Extensions_Allowed : Boolean; 2275 External_Name_Exp_Casing : External_Casing_Type; 2276 External_Name_Imp_Casing : External_Casing_Type; 2277 Fast_Math : Boolean; 2278 Initialize_Scalars : Boolean; 2279 Normalize_Scalars : Boolean; 2280 Optimize_Alignment : Character; 2281 Optimize_Alignment_Local : Boolean; 2282 Persistent_BSS_Mode : Boolean; 2283 Polling_Required : Boolean; 2284 Prefix_Exception_Messages : Boolean; 2285 SPARK_Mode : SPARK_Mode_Type; 2286 SPARK_Mode_Pragma : Node_Id; 2287 Uneval_Old : Character; 2288 Use_VADS_Size : Boolean; 2289 Warnings_As_Errors_Count : Natural; 2290 end record; 2291 2292 -- The following declarations are for GCC version dependent flags. We do 2293 -- not let client code in the compiler test GCC_Version directly, but 2294 -- instead use deferred constants for relevant feature tags. 2295 2296 -- Note: there currently are no such constants defined in this section, 2297 -- since the compiler front end is currently entirely independent of the 2298 -- GCC version, which is a desirable state of affairs. 2299 2300 function get_gcc_version return Int; 2301 pragma Import (C, get_gcc_version, "get_gcc_version"); 2302 2303 GCC_Version : constant Nat := get_gcc_version; 2304 -- GNATMAKE 2305 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that 2306 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported. 2307 2308end Opt; 2309