1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- O P T -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2019, 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 Checksum_Accumulate_Limited_Checksum : Boolean := False; 105 -- Used to control the computation of the limited view of a package. 106 -- (Not currently used, possible optimization for ALI files of units 107 -- in limited with_clauses). 108 109 ---------------------------------------------- 110 -- Settings of Modes for Current Processing -- 111 ---------------------------------------------- 112 113 -- The following mode values represent the current state of processing. 114 -- The values set here are the default values. Unless otherwise noted, 115 -- the value may be reset in Switch-? with an appropriate switch. In 116 -- some cases, the values can also be modified by pragmas, and in the 117 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify 118 -- the default values. 119 120 Latest_Ada_Only : Boolean := False; 121 -- If True, the only value valid for Ada_Version is Ada_Version_Type'Last, 122 -- trying to specify other values will be ignored (in case of pragma 123 -- Ada_xxx) or generate an error (in case of -gnat83/95/xx switches). 124 125 type Ada_Version_Type is (Ada_83, Ada_95, Ada_2005, Ada_2012, Ada_2020); 126 pragma Ordered (Ada_Version_Type); 127 -- Versions of Ada for Ada_Version below. Note that these are ordered, 128 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful. 129 -- Think twice before using "="; Ada_Version >= Ada_2012 is more likely 130 -- what you want, because it will apply to future versions of the language. 131 132 Ada_Version_Default : constant Ada_Version_Type := Ada_2012; 133 pragma Warnings (Off, Ada_Version_Default); 134 -- GNAT 135 -- Default Ada version if no switch given. The Warnings off is to kill 136 -- constant condition warnings. 137 138 Ada_Version : Ada_Version_Type := Ada_Version_Default; 139 -- GNAT 140 -- Current Ada version for compiler, as set by configuration pragmas, 141 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a 142 -- predefined or internal file is compiled. 143 144 Ada_Version_Pragma : Node_Id := Empty; 145 -- Reflects the Ada_xxx pragma that resulted in setting Ada_Version. Used 146 -- to specialize error messages complaining about the Ada version in use. 147 148 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default; 149 -- GNAT 150 -- Like Ada_Version, but does not get set implicitly for predefined or 151 -- internal units, so it reflects the Ada version explicitly set using 152 -- configuration pragmas or compiler switches (or if neither appears, it 153 -- remains set to Ada_Version_Default). This is used in the rare cases 154 -- (notably pragma Obsolescent) where we want the explicit version set. 155 156 Ada_Version_Runtime : Ada_Version_Type := Ada_2012; 157 -- GNAT 158 -- Ada version used to compile the runtime. Used to set Ada_Version (but 159 -- not Ada_Version_Explicit) when compiling predefined or internal units. 160 161 Ada_Final_Suffix : constant String := "final"; 162 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix); 163 -- GNATBIND 164 -- The name of the procedure that performs the finalization at the end of 165 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 166 167 Ada_Init_Suffix : constant String := "init"; 168 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix); 169 -- GNATBIND 170 -- The name of the procedure that performs initialization at the start 171 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 172 173 Ada_Main_Name_Suffix : constant String := "main"; 174 -- GNATBIND 175 -- The suffix for Ada_Main_Name. Defined as a constant here so that it 176 -- can be referenced in a uniform manner to create either the default 177 -- value of Ada_Main_Name (declared below), or the non-default name 178 -- set by Gnatbind.Scan_Bind_Arg. 179 180 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix); 181 -- GNATBIND 182 -- The name of the Ada package generated by the binder (when in Ada mode). 183 -- This variable may be modified by Gnatbind.Scan_Bind_Arg. 184 185 Address_Clause_Overlay_Warnings : Boolean := True; 186 -- GNAT 187 -- Set False to disable address clause warnings. Modified by use of 188 -- -gnatwo/O. 189 190 Address_Is_Private : Boolean := False; 191 -- GNAT, GNATBIND 192 -- Set True if package System has the line "type Address is private;" 193 194 All_Errors_Mode : Boolean := False; 195 -- GNAT 196 -- Flag set to force display of multiple errors on a single line and 197 -- also repeated error messages for references to undefined identifiers 198 -- and certain other repeated error messages. Set by use of -gnatf. 199 200 Allow_Integer_Address : Boolean := False; 201 -- GNAT 202 -- Allow use of integer expression in a context requiring System.Address. 203 -- Set by the use of configuration pragma Allow_Integer_Address Also set 204 -- in relaxed semantics mode for use by CodePeer or when -gnatd.M is used. 205 206 All_Sources : Boolean := False; 207 -- GNATBIND 208 -- Set to True to require all source files to be present. This flag is 209 -- directly modified by gnatmake to affect the shared binder routines. 210 211 Alternate_Main_Name : String_Ptr := null; 212 -- GNATBIND 213 -- Set to non-null when Bind_Alternate_Main_Name is True. This value 214 -- is modified as needed by Gnatbind.Scan_Bind_Arg. 215 216 ASIS_GNSA_Mode : Boolean := False; 217 -- GNAT 218 -- Enable GNSA back-end processing assuming ASIS_Mode is already set to 219 -- True. ASIS_GNSA mode suppresses the call to gigi. 220 221 ASIS_Mode : Boolean := False; 222 -- GNAT 223 -- Enable semantic checks and tree transformations that are important 224 -- for ASIS but that are usually skipped if Operating_Mode is set to 225 -- Check_Semantics. This flag does not have the corresponding option to set 226 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON 227 -- from the code of GNSA-based tool (a client may need to set ON the 228 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not 229 -- make very much sense, because GNSA cannot do back annotation). 230 231 Assertions_Enabled : Boolean := False; 232 -- GNAT 233 -- Indicates default policy (True = Check, False = Ignore) to be applied 234 -- to all assertion aspects and pragmas, and to pragma Debug, if there is 235 -- no overriding Assertion_Policy, Check_Policy, or Debug_Policy pragma. 236 -- Set True by use of -gnata. 237 238 Assume_No_Invalid_Values : Boolean := False; 239 -- GNAT Normally, in accordance with (RM 13.9.1 (9-11)) the front end 240 -- assumes that values could have invalid representations, unless it can 241 -- clearly prove that the values are valid. If this switch is set (by 242 -- pragma Assume_No_Invalid_Values (On)), then the compiler assumes values 243 -- are valid and in range of their representations. This feature is now 244 -- fully enabled in the compiler. 245 246 Back_Annotate_Rep_Info : Boolean := False; 247 -- GNAT 248 -- If set True, enables back annotation of representation information 249 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR 250 -- (list representation information) or -gnatt (generate tree). It is 251 -- also set true if certain Unchecked_Conversion instantiations require 252 -- checking based on annotated values. 253 254 Back_End_Handles_Limited_Types : Boolean; 255 -- This flag is set true if the back end can properly handle limited or 256 -- other by reference types, and avoid copies. If this flag is False, then 257 -- the front end does special expansion for if/case expressions to make 258 -- sure that no copy occurs. If the flag is True, then the expansion for 259 -- if and case expressions relies on the back end properly handling things. 260 -- Currently the default is False for all cases (set in gnat1drv). The 261 -- default can be modified using -gnatd.L (sets the flag True). This is 262 -- used to test the possibility of having the backend handle this. 263 264 Back_End_Inlining : Boolean := False; 265 -- GNAT 266 -- Set True to activate inlining by back-end expansion. This is the normal 267 -- default mode for gcc targets, so it is True on such targets unless the 268 -- switches -gnatN or -gnatd.z are used. See circuitry in gnat1drv for the 269 -- exact conditions for setting this switch. 270 271 Bind_Alternate_Main_Name : Boolean := False; 272 -- GNATBIND 273 -- True if main should be called Alternate_Main_Name.all. 274 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg. 275 276 Bind_Main_Program : Boolean := True; 277 -- GNATBIND 278 -- Set to False if not binding main Ada program 279 280 Bind_For_Library : Boolean := False; 281 -- GNATBIND 282 -- Set to True if the binder needs to generate a file designed for building 283 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg. 284 285 Bind_Only : Boolean := False; 286 -- GNATMAKE, GPRBUILD 287 -- Set to True to skip compile and link steps 288 -- (except when Compile_Only and/or Link_Only are True). 289 290 Blank_Deleted_Lines : Boolean := False; 291 -- GNAT, GNATPREP 292 -- Output empty lines for each line of preprocessed input that is deleted 293 -- in the output, including preprocessor lines starting with a '#'. 294 295 Brief_Output : Boolean := False; 296 -- GNAT, GNATBIND 297 -- Force brief error messages to standard error, even if verbose mode is 298 -- set (so that main error messages go to standard output). 299 300 Build_Bind_And_Link_Full_Project : Boolean := False; 301 -- GNATMAKE 302 -- Set to True to build, bind and link all the sources of a project file 303 -- (switch -B) 304 305 Check_Aliasing_Of_Parameters : Boolean := False; 306 -- GNAT 307 -- Set to True to detect whether subprogram parameters and function results 308 -- alias the same object(s). 309 310 Check_Float_Overflow : Boolean := False; 311 -- GNAT 312 -- Set to True to check that operations on predefined unconstrained float 313 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 314 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 315 -- of the -gnateF switch. 316 317 Check_Object_Consistency : Boolean := False; 318 -- GNATBIND, GNATMAKE 319 -- Set to True to check whether every object file is consistent with its 320 -- corresponding ada library information (ALI) file. An object file is 321 -- inconsistent with the corresponding ALI file if the object file does 322 -- not exist or if it has an older time stamp than the ALI file. Default 323 -- above is for GNATBIND. GNATMAKE overrides this default to True (see 324 -- Make.Initialize) since we normally do need to check source consistencies 325 -- in gnatmake. 326 327 Check_Only : Boolean := False; 328 -- GNATBIND 329 -- Set to True to do checks only, no output of binder file 330 331 Check_Policy_List : Node_Id := Empty; 332 -- GNAT 333 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 334 -- that are linked through the Next_Pragma fields, with the list being 335 -- terminated by Empty. The order is most recently processed first. Note 336 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value 337 -- of this variable, implementing the required scope control for pragmas 338 -- appearing in a declarative part. 339 340 Check_Readonly_Files : Boolean := False; 341 -- GNATMAKE 342 -- Set to True to check readonly files during the make process 343 344 Check_Source_Files : Boolean := True; 345 -- GNATBIND, GNATMAKE 346 -- Set to True to enable consistency checking for any source files that 347 -- are present (i.e. date must match the date in the library info file). 348 -- Set to False for object file consistency check only. This flag is 349 -- directly modified by gnatmake, to affect the shared binder routines. 350 351 Check_Switches : Boolean := False; 352 -- GNATMAKE, GPBUILD 353 -- Set to True to check compiler options during the make process 354 355 Check_Unreferenced : Boolean := False; 356 -- GNAT 357 -- Set to True to enable checking for unreferenced entities other 358 -- than formal parameters (for which see Check_Unreferenced_Formals) 359 -- Modified by use of -gnatwu/U. 360 361 Check_Unreferenced_Formals : Boolean := False; 362 -- GNAT 363 -- Set to True to check for unreferenced formals. This is turned on by 364 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU. 365 366 Check_Validity_Of_Parameters : Boolean := False; 367 -- GNAT 368 -- Set to True to check for proper scalar initialization of subprogram 369 -- parameters on both entry and exit. This is turned on by -gnateV. 370 371 Check_Withs : Boolean := False; 372 -- GNAT 373 -- Set to True to enable checking for unused withs, and also the case 374 -- of withing a package and using none of the entities in the package. 375 -- Modified by use of -gnatwu/U. 376 377 CodePeer_Mode : Boolean := False; 378 -- GNAT, GNATBIND, GPRBUILD 379 -- Enable full CodePeer mode (SCIL generation, disable switches that 380 -- interact badly with it, etc...). This is turned on by -gnatC. 381 382 Commands_To_Stdout : Boolean := False; 383 -- GNATMAKE 384 -- True if echoed commands to be written to stdout instead of stderr 385 386 Comment_Deleted_Lines : Boolean := False; 387 -- GNATPREP 388 -- True if source lines removed by the preprocessor should be commented 389 -- in the output file. 390 391 Compilation_Time : String (1 .. 19); 392 -- GNAT 393 -- Compilation date and time in form YYYY-MM-DD HH:MM:SS 394 395 Compile_Only : Boolean := False; 396 -- GNATMAKE, GNATCLEAN, GPBUILD, GPRCLEAN 397 -- GNATMAKE, GPRBUILD: 398 -- set True to skip bind and link steps (except when Bind_Only is True) 399 -- GNATCLEAN, GPRCLEAN: 400 -- set True to delete only the files produced by the compiler but not the 401 -- library files or the executable files. 402 403 Compiler_Unit : Boolean := False; 404 -- GNAT1 405 -- Set True by an occurrence of pragma Compiler_Unit_Warning (or of the 406 -- obsolete pragma Compiler_Unit) in the main unit. Once set True, stays 407 -- True, since any units that are with'ed directly or indirectly by 408 -- a Compiler_Unit_Warning main unit are subject to the same restrictions. 409 -- Such units really should have their own pragmas, but we do not bother to 410 -- check for that, so this transitivity provides extra checking. 411 412 Config_File : Boolean := True; 413 -- GNAT 414 -- Set to False to inhibit reading and processing of gnat.adc file 415 416 Config_File_Names : String_List_Access := null; 417 -- GNAT 418 -- Names of configuration pragmas files (given by switches -gnatec) 419 420 Configurable_Run_Time_Mode : Boolean := False; 421 -- GNAT, GNATBIND 422 -- Set True if the compiler is operating in configurable run-time mode. 423 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target 424 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind 425 -- for details on the handling of the latter pragma. 426 427 Constant_Condition_Warnings : Boolean := False; 428 -- GNAT 429 -- Set to True to activate warnings on constant conditions. Modified by 430 -- use of -gnatwc/C. 431 432 Create_Mapping_File : Boolean := False; 433 -- GNATMAKE 434 -- Set to True (-C switch) to indicate that the compiler will be invoked 435 -- with a mapping file (-gnatem compiler switch). 436 437 subtype Debug_Level_Value is Nat range 0 .. 3; 438 Debugger_Level : Debug_Level_Value := 0; 439 -- GNAT, GNATBIND 440 -- The value given to the -g parameter. The default value for -g with 441 -- no value is 2. If no -g is specified, defaults to 0. 442 -- Note that the generated code should never depend on this variable, 443 -- since we want debug info to be nonintrusive on the generate code. 444 445 Default_Exit_Status : Int := 0; 446 -- GNATBIND 447 -- Set the default exit status value. Set by the -Xnnn switch for the 448 -- binder. 449 450 Debug_Generated_Code : Boolean := False; 451 -- GNAT 452 -- Set True (-gnatD switch) to debug generated expanded code instead 453 -- of the original source code. Causes debugging information to be 454 -- written with respect to the generated code file that is written. 455 456 Default_Pool : Node_Id := Empty; 457 -- GNAT 458 -- Used to record the storage pool name (or null literal) that is the 459 -- argument of an applicable pragma Default_Storage_Pool. 460 -- Empty: No pragma Default_Storage_Pool applies. 461 -- N_Null node: "pragma Default_Storage_Pool (null);" applies. 462 -- otherwise: "pragma Default_Storage_Pool (X);" applies, and 463 -- this points to the name X. 464 -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value. 465 466 No_Stack_Size : constant := -1; 467 468 Default_Stack_Size : Int := No_Stack_Size; 469 -- GNATBIND 470 -- Set to default primary stack size in units of bytes. Set by the -dnnn 471 -- switch for the binder. A value of No_Stack_Size indicates that 472 -- no default was set by the binder. 473 474 Default_Sec_Stack_Size : Int := No_Stack_Size; 475 -- GNATBIND 476 -- Set to default secondary stack size in units of bytes. Set by the -Dnnn 477 -- switch for the binder. A value of No_Stack_Size indicates that no 478 -- default was set by the binder and the run-time value should be used 479 -- instead. 480 481 Default_SSO : Character := ' '; 482 -- GNAT 483 -- Set if a pragma Default_Scalar_Storage_Order has been given. The value 484 -- of ' ' indicates that no default has been set, otherwise the value is 485 -- either 'H' for High_Order_First or 'L' for Lower_Order_First. 486 487 Detect_Blocking : Boolean := False; 488 -- GNAT 489 -- Set True to force the run time to raise Program_Error if calls to 490 -- potentially blocking operations are detected from protected actions. 491 492 Directories_Must_Exist_In_Projects : Boolean := True; 493 -- PROJECT MANAGER 494 -- Set to False with switch -f of gnatclean and gprclean 495 496 Display_Compilation_Progress : Boolean := False; 497 -- GNATMAKE, GPRBUILD 498 -- Set True (-d switch) to display information on progress while compiling 499 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS). 500 501 type Distribution_Stub_Mode_Type is 502 -- GNAT 503 (No_Stubs, 504 -- Normal mode, no generation/compilation of distribution stubs 505 506 Generate_Receiver_Stub_Body, 507 -- The unit being compiled is the RCI body, and the compiler will 508 -- generate the body for the receiver stubs and compile it. 509 510 Generate_Caller_Stub_Body); 511 -- The unit being compiled is the RCI spec, and the compiler will 512 -- generate the body for the caller stubs and compile it. 513 514 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs; 515 -- GNAT 516 -- This enumeration variable indicates the five states of distribution 517 -- annex stub generation/compilation. 518 519 Do_Not_Execute : Boolean := False; 520 -- GNATMAKE 521 -- Set to True if no actual compilations should be undertaken 522 523 Dump_Source_Text : Boolean := False; 524 -- GNAT 525 -- Set to True (by -gnatL) to dump source text intermingled with generated 526 -- code. Effective only if either of Debug/Print_Generated_Code is true. 527 528 Dynamic_Elaboration_Checks : Boolean := False; 529 -- GNAT 530 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 531 -- switch or by the use of pragma Elaboration_Checks (Dynamic). 532 533 Dynamic_Stack_Measurement : Boolean := False; 534 -- GNATBIND 535 -- Set True to enable dynamic stack measurement (-u flag for gnatbind) 536 537 Dynamic_Stack_Measurement_Array_Size : Nat := 100; 538 -- GNATBIND 539 -- Number of measurements we want to store during dynamic stack analysis. 540 -- When the buffer is full, non-storable results will be output on the fly. 541 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set 542 -- by processing of -u flag for gnatbind. 543 544 Elab_Dependency_Output : Boolean := False; 545 -- GNATBIND 546 -- Set to True to output complete list of elaboration constraints 547 548 Elab_Order_Output : Boolean := False; 549 -- GNATBIND 550 -- Set to True to output chosen elaboration order 551 552 Elab_Info_Messages : Boolean := False; 553 -- GNAT 554 -- Set to True to output info messages for static elabmodel (-gnatel) 555 556 Elab_Warnings : Boolean := True; 557 -- GNAT 558 -- Set to True to generate elaboration warnings (-gnatwl). The warnings are 559 -- enabled by default because they carry the same importance as errors. The 560 -- compiler cannot emit actual errors because elaboration diagnostics need 561 -- dataflow analysis, which is not available. This behavior parallels that 562 -- of the old ABE mechanism. 563 564 Error_Msg_Line_Length : Nat := 0; 565 -- GNAT 566 -- Records the error message line length limit. If this is set to zero, 567 -- then we get the old style behavior, in which each call to the error 568 -- message routines generates one line of output as a separate message. 569 -- If it is set to a non-zero value, then continuation lines are folded 570 -- to make a single long message, and then this message is split up into 571 -- multiple lines not exceeding the specified length. Set by -gnatj=nn. 572 573 Error_To_Warning : Boolean := False; 574 -- GNAT 575 -- If True, then certain error messages (e.g. parameter overlap messages 576 -- for procedure calls in Ada 2012 mode) are treated as warnings instead 577 -- of errors. Set by debug flag -gnatd.E. A search for Error_To_Warning 578 -- will identify affected messages. 579 580 Exception_Handler_Encountered : Boolean := False; 581 -- GNAT 582 -- This flag is set true if the parser encounters an exception handler. 583 -- It is used to set Warn_On_Exception_Propagation True if the restriction 584 -- No_Exception_Propagation is set. 585 586 Exception_Extra_Info : Boolean := False; 587 -- GNAT 588 -- True when switch -gnateE is used. When True, generate extra information 589 -- associated with exception messages (in particular range and index 590 -- checks). 591 592 Exception_Locations_Suppressed : Boolean := False; 593 -- GNAT 594 -- Set to True if a Suppress_Exception_Locations configuration pragma is 595 -- currently active. 596 597 type Exception_Mechanism_Type is 598 -- Determines the kind of mechanism used to handle exceptions 599 -- 600 (Front_End_SJLJ, 601 -- Exceptions use setjmp/longjmp generated explicitly by the front end 602 -- (this includes gigi or other equivalent parts of the code generator). 603 -- AT END handlers are converted into exception handlers by the front 604 -- end in this mode. 605 606 Back_End_ZCX, 607 -- Exceptions are handled by the back end. The front end simply 608 -- generates the handlers as they appear in the source, and AT END 609 -- handlers are left untouched (they are not converted into exception 610 -- handlers when operating in this mode). Propagation is performed 611 -- using a frame unwinding scheme and requires no particular setup code 612 -- at handler sites on regular execution paths. 613 614 Back_End_SJLJ); 615 -- Similar to Back_End_ZCX with respect to the front-end processing 616 -- of regular and AT-END handlers. A setjmp/longjmp scheme is used to 617 -- propagate and setup handler contexts on regular execution paths. 618 619 pragma Convention (C, Exception_Mechanism_Type); 620 621 Exception_Mechanism : Exception_Mechanism_Type := Front_End_SJLJ; 622 -- GNAT 623 -- Set to the appropriate value depending on the flags in system.ads 624 -- (Frontend_Exceptions + ZCX_By_Default). The C convention is there to 625 -- allow access by gigi. 626 627 function Back_End_Exceptions return Boolean; 628 function Front_End_Exceptions return Boolean; 629 function ZCX_Exceptions return Boolean; 630 function SJLJ_Exceptions return Boolean; 631 -- GNAT 632 -- Various properties of the active Exception_Mechanism 633 634 Exception_Tracebacks : Boolean := False; 635 -- GNATBIND 636 -- Set to True to store tracebacks in exception occurrences (-Ea or -E) 637 638 Exception_Tracebacks_Symbolic : Boolean := False; 639 -- GNATBIND 640 -- Set to True to store tracebacks in exception occurrences and enable 641 -- symbolic tracebacks (-Es). 642 643 Expand_Nonbinary_Modular_Ops : Boolean := False; 644 -- Set to True to convert nonbinary modular additions into code 645 -- that relies on the front-end expansion of operator Mod. 646 647 Extensions_Allowed : Boolean := False; 648 -- GNAT 649 -- Set to True by switch -gnatX if GNAT specific language extensions 650 -- are allowed. Currently there are no such defined extensions. 651 652 type External_Casing_Type is ( 653 As_Is, -- External names cased as they appear in the Ada source 654 Uppercase, -- External names forced to all uppercase letters 655 Lowercase); -- External names forced to all lowercase letters 656 657 External_Name_Imp_Casing : External_Casing_Type := Lowercase; 658 -- GNAT 659 -- The setting of this flag determines the casing of external names 660 -- when the name is implicitly derived from an entity name (i.e. either 661 -- no explicit External_Name or Link_Name argument is used, or, in the 662 -- case of extended DEC pragmas, the external name is given using an 663 -- identifier. The As_Is setting is not permitted here (since this would 664 -- create Ada source programs that were case sensitive). 665 666 External_Name_Exp_Casing : External_Casing_Type := As_Is; 667 -- GNAT 668 -- The setting of this flag determines the casing of an external name 669 -- specified explicitly with a string literal. As_Is means the string 670 -- literal is used as given with no modification to the casing. If 671 -- Lowercase or Uppercase is set, then the string is forced to all 672 -- lowercase or all uppercase letters as appropriate. Note that this 673 -- setting has no effect if the external name is given using an identifier 674 -- in the case of extended DEC import/export pragmas (in this case the 675 -- casing is controlled by External_Name_Imp_Casing), and also has no 676 -- effect if an explicit Link_Name is supplied (a link name is always 677 -- used exactly as given). 678 679 External_Unit_Compilation_Allowed : Boolean := False; 680 -- GNATMAKE 681 -- When True (set by gnatmake switch -x), allow compilation of sources 682 -- that are not part of any project file. 683 684 Fast_Math : Boolean := False; 685 -- GNAT 686 -- Indicates the current setting of Fast_Math mode, as set by the use 687 -- of a Fast_Math pragma (set True by Fast_Math (On)). 688 689 Force_ALI_Tree_File : Boolean := False; 690 -- GNAT 691 -- Force generation of ALI file even if errors are encountered. Also forces 692 -- generation of tree file if -gnatt is also set. Set on by use of -gnatQ. 693 694 Disable_ALI_File : Boolean := False; 695 -- GNAT 696 -- Disable generation of ALI file 697 698 Follow_Links_For_Files : Boolean := False; 699 -- PROJECT MANAGER 700 -- Set to True (-eL) to process the project files in trusted mode. If 701 -- Follow_Links is False, it is assumed that the project doesn't contain 702 -- any file duplicated through symbolic links (although the latter are 703 -- still valid if they point to a file which is outside of the project), 704 -- and that no directory has a name which is a valid source name. 705 706 Follow_Links_For_Dirs : Boolean := False; 707 -- PROJECT MANAGER 708 -- Set to True if directories can be links in this project, and therefore 709 -- additional system calls must be performed to ensure that we always see 710 -- the same full name for each directory. 711 712 Force_Checking_Of_Elaboration_Flags : Boolean := False; 713 -- GNATBIND 714 -- True if binding with forced checking of the elaboration flags 715 -- (-F switch set). 716 717 Force_Compilations : Boolean := False; 718 -- GNATMAKE, GPRBUILD 719 -- Set to force recompilations even when the objects are up-to-date. 720 721 Force_Elab_Order_File : String_Ptr := null; 722 -- GNATBIND 723 -- File name specified for -f switch (the forced elaboration order file) 724 725 Front_End_Inlining : Boolean := False; 726 -- GNAT 727 -- Set True to activate inlining by front-end expansion (even on GCC 728 -- targets, where inlining is normally handled by the back end). Set by 729 -- the flag -gnatN (which is now considered obsolescent, since the GCC 730 -- back end can do a better job of inlining than the front end these days). 731 732 Full_Path_Name_For_Brief_Errors : Boolean := False; 733 -- PROJECT MANAGER 734 -- When True, in Brief_Output mode, each error message line will start with 735 -- the full path name of the source. When False, only the file name without 736 -- directory information is used. 737 738 Full_List : Boolean := False; 739 -- GNAT 740 -- Set True to generate full source listing with embedded errors 741 742 Full_List_File_Name : String_Ptr := null; 743 -- GNAT 744 -- Set to file name to generate full source listing to named file (or if 745 -- the name is of the form .xxx, then to name.xxx where name is the source 746 -- file name with extension stripped. 747 748 Generate_C_Code : Boolean := False; 749 -- GNAT 750 -- If True, the Cprint circuitry to generate C code output is activated. 751 -- Set True by use of -gnateg or -gnatd.V. 752 753 Generate_CodePeer_Messages : Boolean := False; 754 -- GNAT 755 -- Generate CodePeer messages. Ignored if CodePeer_Mode is false. This is 756 -- turned on by -gnateC. 757 758 Generate_Processed_File : Boolean := False; 759 -- GNAT 760 -- True when switch -gnateG is used. When True, create in a file 761 -- <source>.prep, if the source is preprocessed. 762 763 Generate_SCIL : Boolean := False; 764 -- GNAT 765 -- Set True to activate SCIL code generation. 766 767 Generate_SCO : Boolean := False; 768 -- GNAT 769 -- True when switch -fdump-scos (or -gnateS) is used. When True, Source 770 -- Coverage Obligation (SCO) information is generated and output in the ALI 771 -- file. See unit Par_SCO for full details. 772 773 Generate_SCO_Instance_Table : Boolean := False; 774 -- GNAT 775 -- True when switch -fdump-scos is used. When True, a table of instances is 776 -- included in SCOs. 777 778 Generating_Code : Boolean := False; 779 -- GNAT 780 -- True if the frontend finished its work and has called the backend to 781 -- process the tree and generate the object file. 782 783 type Ghost_Mode_Type is (None, Check, Ignore); 784 -- Possible legal modes that can be set by aspect/pragma Ghost as well as 785 -- value None, which indicates that no such aspect/pragma applies. 786 787 Ghost_Mode : Ghost_Mode_Type := None; 788 -- GNAT 789 -- The current Ghost mode in effect 790 791 Global_Discard_Names : Boolean := False; 792 -- GNAT, GNATBIND 793 -- True if a pragma Discard_Names appeared as a configuration pragma for 794 -- the current compilation unit. 795 796 GNAT_Encodings : Int; 797 pragma Import (C, GNAT_Encodings, "gnat_encodings"); 798 -- Constant controlling the balance between GNAT encodings and standard 799 -- DWARF to emit in the debug information. It accepts the following values. 800 801 DWARF_GNAT_Encodings_All : constant Int := 0; 802 DWARF_GNAT_Encodings_GDB : constant Int := 1; 803 DWARF_GNAT_Encodings_Minimal : constant Int := 2; 804 805 Identifier_Character_Set : Character; 806 -- GNAT 807 -- This variable indicates the character set to be used for identifiers. 808 -- The possible settings are: 809 -- '1' Latin-1 (ISO-8859-1) 810 -- '2' Latin-2 (ISO-8859-2) 811 -- '3' Latin-3 (ISO-8859-3) 812 -- '4' Latin-4 (ISO-8859-4) 813 -- '5' Latin-Cyrillic (ISO-8859-5) 814 -- '9' Latin-9 (ISO-8859-15) 815 -- 'p' PC (US, IBM page 437) 816 -- '8' PC (European, IBM page 850) 817 -- 'f' Full upper set (all distinct) 818 -- 'n' No upper characters (Ada 83 rules) 819 -- 'w' Latin-1 plus wide characters allowed in identifiers 820 -- 821 -- The setting affects the set of letters allowed in identifiers and the 822 -- upper/lower case equivalences. It does not affect the interpretation of 823 -- character and string literals, which are always stored using the actual 824 -- coding in the source program. This variable is initialized to the 825 -- default value appropriate to the system (in Osint.Initialize), and then 826 -- reset if a command line switch is used to change the setting. 827 828 Ignore_Rep_Clauses : Boolean := False; 829 -- GNAT 830 -- Set True to ignore all representation clauses. Useful when compiling 831 -- code from foreign compilers for checking or ASIS purposes. Can be 832 -- set True by use of -gnatI. 833 834 Ignore_SPARK_Mode_Pragmas_In_Instance : Boolean := False; 835 -- GNAT 836 -- Set True to ignore the semantics and effects of pragma SPARK_Mode when 837 -- the pragma appears inside an instance whose enclosing context is subject 838 -- to SPARK_Mode "off". This property applies to nested instances. 839 840 Ignore_Style_Checks_Pragmas : Boolean := False; 841 -- GNAT 842 -- Set True to ignore all Style_Checks pragmas. Can be set True by use 843 -- of -gnateY. 844 845 Ignore_Unrecognized_VWY_Switches : Boolean := False; 846 -- GNAT 847 -- Set True to ignore unrecognized y, V, w switches. Can be set True by 848 -- use of -gnateu, causing subsequent unrecognized switches to result in 849 -- a warning rather than an error. 850 851 Ignored_Ghost_Region : Node_Id := Empty; 852 -- GNAT 853 -- The start of the current ignored Ghost region. This value must always 854 -- reflect the starting node of the outermost ignored Ghost region. If a 855 -- nested ignored Ghost region is entered, the value must remain unchanged. 856 857 Implementation_Unit_Warnings : Boolean := True; 858 -- GNAT 859 -- Set True to active warnings for use of implementation internal units. 860 -- Modified by use of -gnatwi/-gnatwI. 861 862 Implicit_Packing : Boolean := False; 863 -- GNAT 864 -- If set True, then a Size attribute clause on an array is allowed to 865 -- cause implicit packing instead of generating an error message. Set by 866 -- use of pragma Implicit_Packing. 867 868 Include_Subprogram_In_Messages : Boolean := False; 869 -- GNAT 870 -- Set True to include the enclosing subprogram in compiler messages. 871 872 Ineffective_Inline_Warnings : Boolean := False; 873 -- GNAT 874 -- Set True to activate warnings if front-end inlining (-gnatN) is not able 875 -- to actually inline a particular call (or all calls). Can be controlled 876 -- by use of -gnatwp/-gnatwP. Also set True to activate warnings if 877 -- frontend inlining is not able to inline a subprogram expected to 878 -- be inlined in GNATprove mode. 879 880 Init_Or_Norm_Scalars : Boolean := False; 881 -- GNAT, GNATBIND 882 -- Set True if a pragma Initialize_Scalars applies to the current unit. 883 -- Also set True if a pragma Restriction (Normalize_Scalars) applies. 884 885 Initialize_Scalars : Boolean := False; 886 -- GNAT 887 -- Set True if a pragma Initialize_Scalars applies to the current unit. 888 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 889 890 Initialize_Scalars_Mode1 : Character := 'I'; 891 Initialize_Scalars_Mode2 : Character := 'N'; 892 -- GNATBIND 893 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default 894 -- is IN (invalid values), used if no -S switch is used. 895 896 Inline_Active : Boolean := False; 897 -- GNAT 898 -- Set True to activate pragma Inline processing across modules. Default 899 -- for now is not to inline across module boundaries. 900 901 Inline_Level : Nat := 0; 902 -- GNAT 903 -- Set to indicate the inlining level: 0 means that an appropriate value is 904 -- to be computed by the compiler based on the optimization level (-gnatn), 905 -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full 906 -- inlining across modules (-gnatn2). 907 908 Interface_Library_Unit : Boolean := False; 909 -- GNATBIND 910 -- Set to True to indicate that at least one ALI file is an interface ALI: 911 -- then elaboration flag checks are to be generated in the binder 912 -- generated file. 913 914 Invalid_Value_Used : Boolean := False; 915 -- GNAT 916 -- Set True if a valid Invalid_Value attribute is encountered 917 918 Inline_Processing_Required : Boolean := False; 919 -- GNAT 920 -- Set True if inline processing is required. Inline processing is required 921 -- if an active Inline pragma is processed. The flag is set for a pragma 922 -- Inline or Inline_Always that is actually active. 923 924 In_Place_Mode : Boolean := False; 925 -- GNATMAKE 926 -- Set True to store ALI and object files in place i.e. in the object 927 -- directory if these files already exist or in the source directory 928 -- if not. 929 930 Keep_Going : Boolean := False; 931 -- GNATMAKE, GPRBUILD 932 -- When True signals to ignore compilation errors and keep processing 933 -- sources until there is no more work. 934 935 Keep_Temporary_Files : Boolean := False; 936 -- GNATCMD, GNATMAKE, GPRBUILD 937 -- When True the temporary files are not deleted. Set by switches -dn or 938 -- --keep-temp-files. 939 940 Leap_Seconds_Support : Boolean := False; 941 -- GNATBIND 942 -- Set to True to enable leap seconds support in Ada.Calendar and its 943 -- children. 944 945 Legacy_Elaboration_Checks : Boolean := False; 946 -- GNAT 947 -- Set to True when the pre-18.x access-before-elaboration model is to be 948 -- used. Modified by use of -gnatH. 949 950 Link_Only : Boolean := False; 951 -- GNATMAKE, GPRBUILD 952 -- Set to True to skip compile and bind steps (except when Bind_Only is 953 -- set to True). 954 955 List_Body_Required_Info : Boolean := False; 956 -- GNATMAKE 957 -- List info messages about why a package requires a body. Modified by use 958 -- of -gnatw.y/.Y. 959 960 List_Inherited_Aspects : Boolean := False; 961 -- GNAT 962 -- List inherited invariants, preconditions, and postconditions from 963 -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited 964 -- subtype predicates. Modified by use of -gnatw.l/.L. 965 966 List_Restrictions : Boolean := False; 967 -- GNATBIND 968 -- Set to True to list restrictions pragmas that could apply to partition 969 970 List_Units : Boolean := False; 971 -- GNAT 972 -- List units in the active library for a compilation (-gnatu switch) 973 974 List_Closure : Boolean := False; 975 -- GNATBIND 976 -- List all sources in the closure of a main (-R or -Ra gnatbind switch) 977 978 List_Closure_All : Boolean := False; 979 -- GNATBIND 980 -- List all sources in closure of main including run-time units (-Ra 981 -- gnatbind switch). 982 983 List_Dependencies : Boolean := False; 984 -- GNATMAKE 985 -- When True gnatmake verifies that the objects are up to date and outputs 986 -- the list of object dependencies (-M switch). Output depends if -a switch 987 -- is used or not. This list can be used directly in a Makefile. 988 989 List_Representation_Info : Int range 0 .. 4 := 0; 990 -- GNAT 991 -- Set non-zero by -gnatR switch to list representation information. 992 -- The settings are as follows: 993 -- 994 -- 0 = no listing of representation information (default as above) 995 -- 1 = list rep info for user-defined record and array types 996 -- 2 = list rep info for all user-defined types and objects 997 -- 3 = like 2, but variable fields are decoded symbolically 998 -- 4 = like 3, but list rep info for relevant compiler-generated types 999 1000 List_Representation_Info_To_File : Boolean := False; 1001 -- GNAT 1002 -- Set true by -gnatRs switch. Causes information from -gnatR[1-4]m to be 1003 -- written to file.rep (where file is the name of the source file) instead 1004 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then 1005 -- representation info is written to x.adb.ref. 1006 1007 List_Representation_Info_To_JSON : Boolean := False; 1008 -- GNAT 1009 -- Set true by -gnatRj switch. Causes information from -gnatR[1-4]m to be 1010 -- output in the JSON data interchange format. 1011 1012 List_Representation_Info_Mechanisms : Boolean := False; 1013 -- GNAT 1014 -- Set true by -gnatRm switch. Causes information on mechanisms to be 1015 -- included in the representation output information. 1016 1017 List_Representation_Info_Extended : Boolean := False; 1018 -- GNAT 1019 -- Set true by -gnatRe switch. Causes extended information for record types 1020 -- to be included in the representation output information. 1021 1022 List_Preprocessing_Symbols : Boolean := False; 1023 -- GNAT, GNATPREP 1024 -- Set to True if symbols for preprocessing a source are to be listed 1025 -- before preprocessing occurs. Set to True by switch -s of gnatprep or 1026 -- -s in preprocessing data file for the compiler. 1027 1028 type Create_Repinfo_File_Proc is access procedure (Src : String); 1029 type Write_Repinfo_Line_Proc is access procedure (Info : String); 1030 type Close_Repinfo_File_Proc is access procedure; 1031 -- Types used for procedure addresses below 1032 1033 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null; 1034 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null; 1035 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null; 1036 -- GNAT 1037 -- These three locations are left null when operating in non-compiler (e.g. 1038 -- ASIS mode), but when operating in compiler mode, they are set to point 1039 -- to the three corresponding procedures in Osint-C. The reason for this 1040 -- slightly strange interface is to stop Repinfo from dragging in Osint in 1041 -- ASIS mode, which would include lots of unwanted units in the ASIS build. 1042 1043 type Create_List_File_Proc is access procedure (S : String); 1044 type Write_List_Info_Proc is access procedure (S : String); 1045 type Close_List_File_Proc is access procedure; 1046 -- Types used for procedure addresses below 1047 1048 Create_List_File_Access : Create_List_File_Proc := null; 1049 Write_List_Info_Access : Write_List_Info_Proc := null; 1050 Close_List_File_Access : Close_List_File_Proc := null; 1051 -- GNAT 1052 -- These three locations are left null when operating in non-compiler 1053 -- (e.g. from the binder), but when operating in compiler mode, they are 1054 -- set to point to the three corresponding procedures in Osint-C. The 1055 -- reason for this slightly strange interface is to prevent Repinfo 1056 -- from dragging in Osint-C in the binder, which would include unwanted 1057 -- units in the binder. 1058 1059 Locking_Policy : Character := ' '; 1060 -- GNAT, GNATBIND 1061 1062 -- Set to ' ' for the default case (no locking policy specified). Otherwise 1063 -- set based on the pragma Locking_Policy: 1064 -- Ceiling_Locking: 'C' 1065 -- Concurrent_Readers_Locking: 'R' 1066 -- Inheritance_Locking: 'I' 1067 1068 Locking_Policy_Sloc : Source_Ptr := No_Location; 1069 -- GNAT, GNATBIND 1070 -- Remember location of previous Locking_Policy pragma. This is used for 1071 -- inconsistency error messages. A value of System_Location is used if the 1072 -- policy is set in package System. 1073 1074 Look_In_Primary_Dir : Boolean := True; 1075 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN 1076 -- Set to False if a -I- was present on the command line. When True we are 1077 -- allowed to look in the primary directory to locate other source or 1078 -- library files. 1079 1080 Make_Steps : Boolean := False; 1081 -- GNATMAKE 1082 -- Set to True when either Compile_Only, Bind_Only or Link_Only is 1083 -- set to True. 1084 1085 Main_Index : Int := 0; 1086 -- GNATMAKE 1087 -- This is set to non-zero by gnatmake switch -eInnn to indicate that 1088 -- the main program is the nnn unit in a multi-unit source file. 1089 1090 Mapping_File_Name : String_Ptr := null; 1091 -- GNAT 1092 -- File name of mapping between unit names, file names and path names. 1093 -- (given by switch -gnatem) 1094 1095 Maximum_Messages : Int := 9999; 1096 -- GNAT, GNATBIND 1097 -- Maximum default number of errors before compilation is terminated, or in 1098 -- the case of GNAT, maximum number of warnings before further warnings are 1099 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch. 1100 1101 Maximum_File_Name_Length : Int; 1102 -- GNAT, GNATBIND 1103 -- Maximum number of characters allowed in a file name, not counting the 1104 -- extension, as set by the appropriate switch. If no switch is given, 1105 -- then this value is initialized by Osint to the appropriate value. 1106 1107 Maximum_Instantiations : Int := 8000; 1108 -- GNAT 1109 -- Maximum number of instantiations permitted (to stop runaway cases 1110 -- of nested instantiations). These situations probably only occur in 1111 -- specially concocted test cases. Can be modified by -gnateinn switch. 1112 1113 Maximum_Processes : Positive := 1; 1114 -- GNATMAKE, GPRBUILD 1115 -- Maximum number of processes that should be spawned to carry out 1116 -- compilations. 1117 1118 Minimal_Recompilation : Boolean := False; 1119 -- GNATMAKE 1120 -- Set to True if minimal recompilation mode requested 1121 1122 Minimize_Expression_With_Actions : Boolean := False; 1123 -- GNAT 1124 -- If True, minimize the use of N_Expression_With_Actions node. 1125 -- This can be used in particular on some back-ends where this node is 1126 -- difficult to support. 1127 1128 Modify_Tree_For_C : Boolean := False; 1129 -- GNAT 1130 -- If this switch is set True (currently it is set only by -gnatd.V), then 1131 -- certain meaning-preserving transformations are applied to the tree to 1132 -- make it easier to interface with back ends that implement C semantics. 1133 -- There is a section in Sinfo which describes the transformations made. 1134 1135 Multiple_Unit_Index : Int := 0; 1136 -- GNAT 1137 -- This is set non-zero if the current unit is being compiled in multiple 1138 -- unit per file mode, meaning that the current unit is selected from the 1139 -- sequence of units in the current source file, using the value stored 1140 -- in this variable (e.g. 2 = select second unit in file). A value of 1141 -- zero indicates that we are in normal (one unit per file) mode. 1142 1143 No_Backup : Boolean := False; 1144 -- GNATNAME 1145 -- Do not create backup copies of project files. Set by switch --no-backup. 1146 1147 No_Component_Reordering : Boolean := False; 1148 -- GNAT 1149 -- Set True if pragma No_Component_Reordering with no parameter encountered 1150 1151 No_Deletion : Boolean := False; 1152 -- GNATPREP 1153 -- Set by preprocessor switch -a. Do not eliminate any source text. Implies 1154 -- Undefined_Symbols_Are_False. Useful to perform a syntax check on all 1155 -- branches of #if constructs. 1156 1157 No_Elab_Code_All_Pragma : Node_Id := Empty; 1158 -- Set to point to a No_Elaboration_Code_All pragma or aspect encountered 1159 -- in the spec of the extended main unit. Used to determine if we need to 1160 -- do special tests for violation of this aspect. 1161 1162 No_Heap_Finalization_Pragma : Node_Id := Empty; 1163 -- GNAT 1164 -- Set to point to a No_Heap_Finalization pragma defined in a configuration 1165 -- file. 1166 1167 No_Main_Subprogram : Boolean := False; 1168 -- GNATMAKE, GNATBIND 1169 -- Set to True if compilation/binding of a program without main 1170 -- subprogram requested. 1171 1172 No_Run_Time_Mode : Boolean := False; 1173 -- GNAT, GNATBIND 1174 -- This flag is set True if a No_Run_Time pragma is encountered. See spec 1175 -- of Rtsfind for a full description of handling of this pragma. 1176 1177 No_Split_Units : Boolean := False; 1178 -- GPRBUILD 1179 -- Set to True with switch --no-split-units. When True, unit sources, spec, 1180 -- body and subunits, must all be in the same project. This is checked 1181 -- after each compilation. 1182 1183 No_Stdinc : Boolean := False; 1184 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF 1185 -- Set to True if no default source search dirs added to search list. 1186 1187 No_Stdlib : Boolean := False; 1188 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF 1189 -- Set to True if no default library search dirs added to search list. 1190 1191 No_Strict_Aliasing : Boolean := False; 1192 -- GNAT 1193 -- Set True if pragma No_Strict_Aliasing with no parameters encountered. 1194 1195 No_Tagged_Streams : Node_Id := Empty; 1196 -- GNAT 1197 -- If a pragma No_Tagged_Streams is active for the current scope, this 1198 -- points to the corresponding pragma. 1199 1200 Normalize_Scalars : Boolean := False; 1201 -- GNAT, GNATBIND 1202 -- Set True if a pragma Normalize_Scalars applies to the current unit. 1203 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 1204 1205 Object_Directory_Present : Boolean := False; 1206 -- GNATMAKE 1207 -- Set to True when an object directory is specified with option -D 1208 1209 Object_Path_File_Name : String_Ptr := null; 1210 -- GNAT2WHY 1211 -- Path of the temporary file that contains a list of object directories 1212 -- passed by -gnateO=<obj_path_file>. 1213 1214 One_Compilation_Per_Obj_Dir : Boolean := False; 1215 -- GNATMAKE, GPRBUILD 1216 -- Set to True with switch --single-compile-per-obj-dir. When True, there 1217 -- cannot be simultaneous compilations with the object files in the same 1218 -- object directory, if project files are used. 1219 1220 OpenAcc_Enabled : Boolean := False; 1221 -- GNAT 1222 -- Indicates whether OpenAcc pragmas should be taken into account. Set to 1223 -- True by the use of -fopenacc. 1224 1225 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code); 1226 pragma Ordered (Operating_Mode_Type); 1227 Operating_Mode : Operating_Mode_Type := Generate_Code; 1228 -- GNAT 1229 -- Indicates the operating mode of the compiler. The default is generate 1230 -- code, which runs the parser, semantics and backend. Switches can be 1231 -- used to set syntax checking only mode, or syntax and semantics checking 1232 -- only mode. Operating_Mode can also be modified as a result of detecting 1233 -- errors during the compilation process. In particular if any serious 1234 -- error is detected then this flag is reset from Generate_Code to 1235 -- Check_Semantics after generating an error message. This is an ordered 1236 -- type with the semantics that each value does more than the previous one. 1237 1238 Optimize_Alignment : Character := 'O'; 1239 -- GNAT 1240 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can 1241 -- be modified by use of pragma Optimize_Alignment. 1242 1243 Optimize_Alignment_Local : Boolean := False; 1244 -- GNAT 1245 -- Set True if Optimize_Alignment mode is set by a local configuration 1246 -- pragma that overrides the gnat.adc (or other configuration file) default 1247 -- so that the unit is not dependent on the default setting. Also always 1248 -- set True for internal units, since these always have a default setting 1249 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to 1250 -- them all having such an explicit pragma in each unit). 1251 1252 Original_Operating_Mode : Operating_Mode_Type := Generate_Code; 1253 -- GNAT 1254 -- Indicates the original operating mode of the compiler as set by compiler 1255 -- options. This is identical to Operating_Mode except that this is not 1256 -- affected by errors. 1257 1258 Optimization_Level : Int; 1259 pragma Import (C, Optimization_Level, "optimize"); 1260 -- GNAT 1261 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3) 1262 1263 Optimize_Size : Int; 1264 pragma Import (C, Optimize_Size, "optimize_size"); 1265 -- GNAT 1266 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero 1267 -- in -Os mode and set to zero otherwise. 1268 1269 Output_File_Name_Present : Boolean := False; 1270 -- GNATBIND, GNAT, GNATMAKE 1271 -- Set to True when the output C file name is given with option -o for 1272 -- GNATBIND, when the object file name is given with option -gnatO for GNAT 1273 -- or when the executable is given with option -o for GNATMAKE. 1274 1275 Output_Linker_Option_List : Boolean := False; 1276 -- GNATBIND 1277 -- True if output of list of linker options is requested (-K switch set) 1278 1279 Output_ALI_List : Boolean := False; 1280 ALI_List_Filename : String_Ptr; 1281 -- GNATBIND 1282 -- True if output of list of ALIs is requested (-A switch set). List is 1283 -- output under the given filename, or standard output if not specified. 1284 1285 Output_Object_List : Boolean := False; 1286 Object_List_Filename : String_Ptr; 1287 -- GNATBIND 1288 -- True if output of list of objects is requested (-O switch set). List is 1289 -- output under the given filename, or standard output if not specified. 1290 1291 Partition_Elaboration_Policy : Character := ' '; 1292 -- GNAT, GNATBIND 1293 -- Set to ' ' for the default case (no elaboration policy specified). Reset 1294 -- to first character (uppercase) of locking policy name if a valid pragma 1295 -- Partition_Elaboration_Policy is encountered. 1296 1297 Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location; 1298 -- GNAT, GNATBIND 1299 -- Remember location of previous Partition_Elaboration_Policy pragma. This 1300 -- is used for inconsistency error messages. A value of System_Location is 1301 -- used if the policy is set in package System. 1302 1303 Persistent_BSS_Mode : Boolean := False; 1304 -- GNAT 1305 -- True if a Persistent_BSS configuration pragma is in effect, causing 1306 -- potentially persistent data to be placed in the persistent_bss section. 1307 1308 Pessimistic_Elab_Order : Boolean := False; 1309 -- GNATBIND 1310 -- True if pessimistic elaboration order is to be chosen (-p switch set) 1311 1312 Polling_Required : Boolean := False; 1313 -- GNAT 1314 -- Set to True if polling for asynchronous abort is enabled by using 1315 -- the -gnatP option for GNAT. 1316 1317 Prefix_Exception_Messages : Boolean := False; 1318 -- GNAT 1319 -- Set True to prefix exception messages with entity-name: 1320 1321 Preprocessing_Data_File : String_Ptr := null; 1322 -- GNAT 1323 -- Set by switch -gnatep=. The file name of the preprocessing data file. 1324 1325 Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4); 1326 -- An extensible array to temporarily stores symbol definitions specified 1327 -- on the command line with -gnateD switches. The value 4 is an arbitrary 1328 -- starting point, if more space is needed it is allocated as required. 1329 1330 Preprocessing_Symbol_Last : Natural := 0; 1331 -- Index of last symbol definition in array Symbol_Definitions 1332 1333 Print_Generated_Code : Boolean := False; 1334 -- GNAT 1335 -- Set to True to enable output of generated code in source form. This 1336 -- flag is set by the -gnatG switch. 1337 1338 Print_Standard : Boolean := False; 1339 -- GNAT 1340 -- Set to true to enable printing of package standard in source form. 1341 -- This flag is set by the -gnatS switch 1342 1343 type Usage is (Unknown, Not_In_Use, In_Use); 1344 Project_File_In_Use : Usage := Unknown; 1345 -- GNAT 1346 -- Indicates if a project file is used or not. Set to In_Use by the first 1347 -- SFNP pragma. 1348 1349 Quantity_Of_Default_Size_Sec_Stacks : Int := -1; 1350 -- GNATBIND 1351 -- The number of default sized secondary stacks that the binder should 1352 -- generate. Allows ZFP users to have the binder generate extra stacks if 1353 -- needed to support multithreaded applications. A value of -1 indicates 1354 -- that no size was set by the binder. 1355 1356 Queuing_Policy : Character := ' '; 1357 -- GNAT, GNATBIND 1358 -- Set to ' ' for the default case (no queuing policy specified). Reset to 1359 -- first character (uppercase) of locking policy name if a valid 1360 -- Queuing_Policy pragma is encountered. 1361 1362 Queuing_Policy_Sloc : Source_Ptr := No_Location; 1363 -- GNAT, GNATBIND 1364 -- Remember location of previous Queuing_Policy pragma. This is used for 1365 -- inconsistency error messages. A value of System_Location is used if the 1366 -- policy is set in package System. 1367 1368 Quiet_Output : Boolean := False; 1369 -- GNATMAKE, GNATCLEAN, GPRBUILD, GPRCLEAN 1370 -- Set to True if the tool should not have any output if there are no 1371 -- errors or warnings. 1372 1373 Overriding_Renamings : Boolean := False; 1374 -- GNAT 1375 -- Set to True to enable compatibility mode with Rational compiler, and 1376 -- to accept renamings of implicit operations in their own scope. 1377 1378 Relaxed_Elaboration_Checks : Boolean := False; 1379 -- GNAT 1380 -- Set to True to ignore certain elaboration scenarios, thus making the 1381 -- current ABE mechanism more permissive. This behavior is applicable to 1382 -- both the default and the legacy ABE models. Modified by use of -gnatJ. 1383 1384 Relaxed_RM_Semantics : Boolean := False; 1385 -- GNAT 1386 -- Set to True to ignore some Ada semantic error to help parse legacy Ada 1387 -- code for use in e.g. static analysis (such as CodePeer). This deals 1388 -- with cases where other compilers allow illegal constructs. Tools such as 1389 -- CodePeer are interested in analyzing code rather than enforcing legality 1390 -- rules, so as long as these illegal constructs end up with code that can 1391 -- be handled by the tool in question, there is no reason to reject the 1392 -- code that is considered correct by the other compiler. 1393 1394 Replace_In_Comments : Boolean := False; 1395 -- GNATPREP 1396 -- Set to True if -C switch used. 1397 1398 RTS_Lib_Path_Name : String_Ptr := null; 1399 RTS_Src_Path_Name : String_Ptr := null; 1400 -- GNAT 1401 -- Set to the "adalib" and "adainclude" directories of the run time 1402 -- specified by --RTS=. 1403 1404 RTS_Switch : Boolean := False; 1405 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF 1406 -- Set to True when the --RTS switch is set 1407 1408 Run_Path_Option : Boolean := True; 1409 -- GNATMAKE, GNATLINK 1410 -- Set to False when no run_path_option should be issued to the linker 1411 1412 Search_Directory_Present : Boolean := False; 1413 -- GNAT 1414 -- Set to True when argument is -I. Reset to False when next argument, a 1415 -- search directory path is taken into account. Note that this is quite 1416 -- different from other switches in this section in that it is only set in 1417 -- a transitory manner as a result of scanning a -I switch with no file 1418 -- name, and if set, is an indication that the next argument is to be 1419 -- treated as a file name. 1420 1421 Sec_Stack_Used : Boolean := False; 1422 -- GNAT, GBATBIND 1423 -- Set True if generated code uses the System.Secondary_Stack package. For 1424 -- the binder, set if any unit uses the secondary stack package. 1425 1426 Setup_Projects : Boolean := False; 1427 -- GNAT DRIVER 1428 -- Set to True for GNAT SETUP: the Project Manager creates nonexistent 1429 -- object, library, and exec directories. 1430 1431 Shared_Libgnat : Boolean; 1432 -- GNATBIND 1433 -- Set to True if a shared libgnat is requested by using the -shared option 1434 -- for GNATBIND and to False when using the -static option. The value of 1435 -- this flag is set by Gnatbind.Scan_Bind_Arg. 1436 1437 Short_Circuit_And_Or : Boolean := False; 1438 -- GNAT 1439 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit. 1440 1441 type SPARK_Mode_Type is (None, Off, On); 1442 -- Possible legal modes that can be set by aspect/pragma SPARK_Mode, as 1443 -- well as the value None, which indicates no such pragma/aspect applies. 1444 1445 SPARK_Mode : SPARK_Mode_Type := None; 1446 -- GNAT 1447 -- Current SPARK mode setting. 1448 1449 SPARK_Mode_Pragma : Node_Id := Empty; 1450 -- GNAT 1451 -- If the current SPARK_Mode (above) was set by a pragma, this records 1452 -- the pragma that set this mode. 1453 1454 SPARK_Switches_File_Name : String_Ptr := null; 1455 -- GNAT 1456 -- Set to non-null file name by use of the -gnates switch to specify 1457 -- SPARK (gnat2why) specific switches in the given file name. 1458 1459 Special_Exception_Package_Used : Boolean := False; 1460 -- GNAT 1461 -- Set to True if either of the unit GNAT.Most_Recent_Exception or 1462 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of 1463 -- local raise statements into gotos in the presence of either package. 1464 1465 Sprint_Line_Limit : Nat := 72; 1466 -- GNAT 1467 -- Limit values for chopping long lines in Cprint/Sprint output, can be 1468 -- reset by use of NNN parameter with -gnatG or -gnatD switches. 1469 1470 Stack_Checking_Enabled : Boolean := False; 1471 -- GNAT 1472 -- Set to indicate if stack checking is enabled for the compilation. This 1473 -- is set directly from the value in the gcc back end in the body of the 1474 -- gcc version of back_end.adb. 1475 1476 Style_Check : Boolean := False; 1477 -- GNAT 1478 -- Set True to perform style checks. Activates checks carried out in 1479 -- package Style (see body of this package for details of checks). This 1480 -- flag is set True by use of either the -gnatg or -gnaty switches, or 1481 -- by the Style_Check pragma. 1482 1483 Style_Check_Main : Boolean := False; 1484 -- GNAT 1485 -- Set True if Style_Check was set for the main unit. This is used to 1486 -- enable style checks for units in the main extended source that get 1487 -- with'ed indirectly. It is set True by use of either the -gnatg or 1488 -- -gnaty switches, but not by use of the Style_Checks pragma. 1489 1490 Disable_FE_Inline : Boolean := False; 1491 Disable_FE_Inline_Always : Boolean := False; 1492 -- GNAT 1493 -- Request to disable front end inlining from pragma Inline or pragma 1494 -- Inline_Always out of the presence of the -fno-inline back end flag 1495 -- on the command line, regardless of any other switches that are set. 1496 -- It remains the back end's reponsibility to honor -fno-inline at the 1497 -- back end level. 1498 1499 Suppress_Control_Flow_Optimizations : Boolean := False; 1500 -- GNAT 1501 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations 1502 -- that interfere with coverage analysis based on the object code. 1503 1504 System_Extend_Pragma_Arg : Node_Id := Empty; 1505 -- GNAT 1506 -- Set non-empty if and only if a correct Extend_System pragma was present 1507 -- in which case it points to the argument of the pragma, and the name can 1508 -- be located as Chars (Expression (System_Extend_Pragma_Arg)). 1509 1510 System_Extend_Unit : Node_Id := Empty; 1511 -- GNAT 1512 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System 1513 -- is never appropriate in GNAT_Mode (and causes troubles, including 1514 -- bogus circularities, if we try to compile the run-time library with 1515 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit 1516 -- is a copy of the value set in System_Extend_Pragma_Arg. 1517 1518 Subunits_Missing : Boolean := False; 1519 -- GNAT 1520 -- This flag is set true if missing subunits are detected with code 1521 -- generation active. This causes code generation to be skipped. 1522 1523 Suppress_Checks : Boolean := False; 1524 -- GNAT 1525 -- Set to True if -gnatp (suppress all checks) switch present. 1526 1527 Suppress_Options : Suppress_Record; 1528 -- GNAT 1529 -- Indicates outer level setting of check suppression. This initializes 1530 -- the settings of the outer scope level in any unit compiled. This is 1531 -- initialized by Osint.Initialize, and further initialized by the 1532 -- Adjust_Global_Switches flag in Gnat1drv. 1533 1534 Table_Factor : Int := 1; 1535 -- GNAT 1536 -- Factor by which all initial table sizes set in Alloc are multiplied. 1537 -- Used in Table to calculate initial table sizes (the initial table size 1538 -- is the value in Alloc, used as the Table_Initial parameter value, 1539 -- multiplied by the factor given here. The default value is used if no 1540 -- -gnatT switch appears. 1541 1542 Tagged_Type_Expansion : Boolean := True; 1543 -- GNAT 1544 -- Set True if tagged types and interfaces should be expanded by the 1545 -- front-end. If False, the original tree is left unexpanded for tagged 1546 -- types and dispatching calls, assuming the underlying target supports it. 1547 1548 Target_Dependent_Info_Read_Name : String_Ptr := null; 1549 -- GNAT 1550 -- Set non-null to override the normal processing in Get_Targ and set the 1551 -- necessary information by reading the target dependent information file 1552 -- whose name is given here (see packages Get_Targ and Set_Targ for full 1553 -- details). Set to non-null file name by use of the -gnateT switch. 1554 1555 Target_Dependent_Info_Write_Name : String_Ptr := null; 1556 -- GNAT 1557 -- Set non-null to enable a call to Set_Targ.Write_Target_Dependent_Info 1558 -- which writes a target independent information file (see packages 1559 -- Get_Targ and Set_Targ for full details) using the name given by 1560 -- this switch. Set to non-null file name by use of the -gnatet switch. 1561 1562 type Origin_Of_Target is (Unknown, Default, Specified); 1563 1564 Target_Origin : Origin_Of_Target := Unknown; 1565 -- GPRBUILD 1566 -- Indicates the origin of attribute Target in project files 1567 1568 Target_Value : String_Access := null; 1569 -- GPRBUILD 1570 -- Indicates the value of attribute Target in project files 1571 1572 Task_Dispatching_Policy : Character := ' '; 1573 -- GNAT, GNATBIND 1574 -- Set to ' ' for the default case (no task dispatching policy specified). 1575 -- Reset to first character (uppercase) of task dispatching policy name 1576 -- if a valid Task_Dispatching_Policy pragma is encountered. 1577 1578 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location; 1579 -- GNAT, GNATBIND 1580 -- Remember location of previous Task_Dispatching_Policy pragma. This is 1581 -- used for inconsistency error messages. A value of System_Location is 1582 -- used if the policy is set in package System. 1583 1584 Tasking_Used : Boolean := False; 1585 -- Set True if any tasking construct is encountered. Used to activate the 1586 -- output of the Q, L and T lines in ALI files. 1587 1588 Time_Slice_Set : Boolean := False; 1589 -- GNATBIND 1590 -- Set True if a pragma Time_Slice is processed in the main unit, or 1591 -- if the -gnatTnn switch is present to set a time slice value. 1592 1593 Time_Slice_Value : Nat; 1594 -- GNATBIND 1595 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if 1596 -- Time_Slice pragma has been processed. Set to the time slice value in 1597 -- microseconds. Negative values are stored as zero, and the value is not 1598 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are 1599 -- reset to this maximum. This can also be set with the -gnatTnn switch. 1600 1601 Tolerate_Consistency_Errors : Boolean := False; 1602 -- GNATBIND 1603 -- Tolerate time stamp and other consistency errors. If this flag is set to 1604 -- True (-t), then inconsistencies result in warnings rather than errors. 1605 1606 Treat_Categorization_Errors_As_Warnings : Boolean := False; 1607 -- Normally categorization errors are true illegalities. If this switch 1608 -- is set, then such errors result in warning messages rather than error 1609 -- messages. Set True by -gnateP (P for Pure/Preelaborate). Also set in 1610 -- Relaxed_RM_Semantics mode since some old Ada 83 compilers treated 1611 -- pragma Preelaborate differently. 1612 1613 Treat_Restrictions_As_Warnings : Boolean := False; 1614 -- GNAT 1615 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by 1616 -- -gnatr switch. 1617 1618 Tree_Output : Boolean := False; 1619 -- GNAT 1620 -- Set to True (-gnatt) to generate output tree file 1621 1622 Try_Semantics : Boolean := False; 1623 -- GNAT 1624 -- Flag set to force attempt at semantic analysis, even if parser errors 1625 -- occur. This will probably cause blowups at this stage in the game. On 1626 -- the other hand, most such blowups will be caught cleanly and simply 1627 -- say compilation abandoned. This flag is set True by -gnatq or -gnatQ. 1628 1629 Unchecked_Shared_Lib_Imports : Boolean := False; 1630 -- GPRBUILD 1631 -- Set to True when shared library projects are allowed to import projects 1632 -- that are not shared library projects. Set on by use of the switch 1633 -- --unchecked-shared-lib-imports. 1634 1635 Undefined_Symbols_Are_False : Boolean := False; 1636 -- GNAT, GNATPREP 1637 -- Set to True by switch -u of gnatprep or -u in the preprocessing data 1638 -- file for the compiler. Indicates that while preprocessing sources, 1639 -- symbols that are not defined have the value FALSE. 1640 1641 Uneval_Old : Character := 'E'; 1642 -- GNAT 1643 -- Set to 'E'/'W'/'A' for use of Error/Warn/Allow in a valid pragma 1644 -- Unevaluated_Use_Of_Old. Default in the absence of the pragma is 'E' 1645 -- for the RM default behavior of giving an error. 1646 1647 Unique_Error_Tag : Boolean := Tag_Errors; 1648 -- GNAT 1649 -- Indicates if error messages are to be prefixed by the string error: 1650 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch. 1651 1652 Unnest_Subprogram_Mode : Boolean := False; 1653 -- If true, activates the circuitry for unnesting subprograms (see the spec 1654 -- of Exp_Unst for full details). Currently set only by use of -gnatd.1. 1655 1656 Unreserve_All_Interrupts : Boolean := False; 1657 -- GNAT, GNATBIND 1658 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma 1659 -- appears anywhere in the main unit for GNAT, or if any ALI file has the 1660 -- corresponding attribute set in GNATBIND. 1661 1662 Upper_Half_Encoding : Boolean := False; 1663 -- GNAT, GNATBIND 1664 -- Normally set False, indicating that upper half ISO 8859-1 characters are 1665 -- used in the normal way to represent themselves. If the wide character 1666 -- encoding method uses the upper bit for this encoding, then this flag is 1667 -- set True, and upper half characters in the source indicate the start of 1668 -- a wide character sequence. Set by -gnatW or -W switches. 1669 1670 Use_Include_Path_File : Boolean := False; 1671 -- GNATMAKE, GPRBUILD 1672 -- When True, create a source search path file, even when a mapping file 1673 -- is used. 1674 1675 Usage_Requested : Boolean := False; 1676 -- GNAT, GNATBIND, GNATMAKE 1677 -- Set to True if -h (-gnath for the compiler) switch encountered 1678 -- requesting usage information 1679 1680 Use_Pragma_Linker_Constructor : Boolean := False; 1681 -- GNATBIND 1682 -- True if pragma Linker_Constructor applies to adainit 1683 1684 Use_VADS_Size : Boolean := False; 1685 -- GNAT 1686 -- Set to True if a valid pragma Use_VADS_Size is processed 1687 1688 Validity_Checks_On : Boolean := True; 1689 -- GNAT 1690 -- This flag determines if validity checking is on or off. The initial 1691 -- state is on, and the required default validity checks are active. The 1692 -- actual set of checks that is performed if Validity_Checks_On is set is 1693 -- defined by the switches in package Validsw. The Validity_Checks_On flag 1694 -- is controlled by pragma Validity_Checks (On | Off), and also some 1695 -- generated compiler code (typically code that has to do with validity 1696 -- check generation) is compiled with this flag set to False. This flag is 1697 -- set to False by the -gnatp switch. 1698 1699 Verbose_Mode : Boolean := False; 1700 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN, 1701 -- GPRBUILD, GPRCLEAN 1702 -- Set to True to get verbose mode (full error message text and location 1703 -- information sent to standard output, also header, copyright and summary) 1704 1705 type Verbosity_Level_Type is (None, Low, Medium, High); 1706 pragma Ordered (Verbosity_Level_Type); 1707 Verbosity_Level : Verbosity_Level_Type := High; 1708 -- GNATMAKE 1709 -- Modified by gnatmake switches -v, -vl, -vm, -vh. Indicates 1710 -- the level of verbosity of informational messages: 1711 -- 1712 -- In Low Verbosity, the reasons why a source is recompiled, the name 1713 -- of the executable and the reason it must be rebuilt is output. 1714 -- 1715 -- In Medium Verbosity, additional lines are output for each ALI file 1716 -- that is checked. 1717 -- 1718 -- In High Verbosity, additional lines are output when the ALI file 1719 -- is part of an Ada library, is read-only or is part of the runtime. 1720 1721 Warn_On_Ada_2005_Compatibility : Boolean := True; 1722 -- GNAT 1723 -- Set to True to generate all warnings on Ada 2005 compatibility issues, 1724 -- including warnings on Ada 2005 obsolescent features used in Ada 2005 1725 -- mode. Set by default, modified by use of -gnatwy/Y. 1726 1727 Warn_On_Ada_2012_Compatibility : Boolean := True; 1728 -- GNAT 1729 -- Set to True to generate all warnings on Ada 2012 compatibility issues, 1730 -- including warnings on Ada 2012 obsolescent features used in Ada 2012 1731 -- mode. Modified by use of -gnatwy/Y. 1732 1733 Warn_On_All_Unread_Out_Parameters : Boolean := False; 1734 -- GNAT 1735 -- Set to True to generate warnings in all cases where a variable is 1736 -- modified by being passed as to an OUT formal, but the resulting value is 1737 -- never read. The default is that this warning is suppressed. Modified 1738 -- by use of gnatw.o/.O. 1739 1740 Warn_On_Assertion_Failure : Boolean := True; 1741 -- GNAT 1742 -- Set to True to activate warnings on assertions that can be determined 1743 -- at compile time will always fail. Modified by use of -gnatw.a/.A. 1744 1745 Warn_On_Assumed_Low_Bound : Boolean := True; 1746 -- GNAT 1747 -- Set to True to activate warnings for string parameters that are indexed 1748 -- with literals or S'Length, presumably assuming a lower bound of one. 1749 -- Modified by use of -gnatww/W. 1750 1751 Warn_On_Atomic_Synchronization : Boolean := False; 1752 -- GNAT 1753 -- Set to True to generate information messages for atomic synchronization. 1754 -- Modified by use of -gnatw.n/.N. 1755 1756 Warn_On_Bad_Fixed_Value : Boolean := False; 1757 -- GNAT 1758 -- Set to True to generate warnings for static fixed-point expression 1759 -- values that are not an exact multiple of the small value of the type. 1760 -- Odd by default, modified by use of -gnatwb/B. 1761 1762 Warn_On_Biased_Representation : Boolean := True; 1763 -- GNAT 1764 -- Set to True to generate warnings for size clauses, component clauses 1765 -- and component_size clauses that force biased representation. Modified 1766 -- by use of -gnatw.b/.B. 1767 1768 Warn_On_Constant : Boolean := False; 1769 -- GNAT 1770 -- Set to True to generate warnings for variables that could be declared 1771 -- as constants. Modified by use of -gnatwk/K. 1772 1773 Warn_On_Deleted_Code : Boolean := False; 1774 -- GNAT 1775 -- Set to True to generate warnings for code deleted by the front end 1776 -- for conditional statements whose outcome is known at compile time. 1777 -- Modified by use of -gnatwt/T. 1778 1779 Warn_On_Dereference : Boolean := False; 1780 -- GNAT 1781 -- Set to True to generate warnings for implicit dereferences for array 1782 -- indexing and record component access. Modified by use of -gnatwd/D. 1783 1784 Warn_On_Export_Import : Boolean := True; 1785 -- GNAT 1786 -- Set to True to generate warnings for suspicious use of export or 1787 -- import pragmas. Modified by use of -gnatwx/X. 1788 1789 Warn_On_Elab_Access : Boolean := False; 1790 -- GNAT 1791 -- Set to True to generate warnings for P'Access in the case where 1792 -- subprogram P is in the same package as the P'Access, and the P'Access is 1793 -- evaluated at package elaboration time, and occurs before the body of P 1794 -- has been elaborated. 1795 1796 Warn_On_Hiding : Boolean := False; 1797 -- GNAT 1798 -- Set to True to generate warnings if a declared entity hides another 1799 -- entity. The default is that this warning is suppressed. Modified by 1800 -- use of -gnatwh/H. 1801 1802 Warn_On_Modified_Unread : Boolean := False; 1803 -- GNAT 1804 -- Set to True to generate warnings if a variable is assigned but is never 1805 -- read. Also controls warnings for similar cases involving out parameters, 1806 -- but only if there is only one out parameter for the procedure involved. 1807 -- The default is that this warning is suppressed, modified by use of 1808 -- -gnatwm/M. 1809 1810 Warn_On_No_Value_Assigned : Boolean := True; 1811 -- GNAT 1812 -- Set to True to generate warnings if no value is ever assigned to a 1813 -- variable that is at least partially uninitialized. Set to false to 1814 -- suppress such warnings. The default is that such warnings are enabled. 1815 -- Modified by use of -gnatwv/V. 1816 1817 Warn_On_Non_Local_Exception : Boolean := False; 1818 -- GNAT 1819 -- Set to True to generate warnings for non-local exception raises and also 1820 -- handlers that can never handle a local raise. This warning is only ever 1821 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The 1822 -- default is not to generate the warnings except that if the source has 1823 -- at least one exception handler, and this restriction is set, and the 1824 -- warning was not explicitly turned off, then it is turned on by default. 1825 -- Modified by use of -gnatw.x/.X. 1826 1827 No_Warn_On_Non_Local_Exception : Boolean := False; 1828 -- GNAT 1829 -- This is set to True if the above warning is explicitly suppressed. We 1830 -- use this to avoid turning it on by default when No_Exception_Propagation 1831 -- restriction is set and an exception handler is present. 1832 1833 Warn_On_Object_Renames_Function : Boolean := False; 1834 -- GNAT 1835 -- Set to True to generate warnings when a function result is renamed as 1836 -- an object. The default is that this warning is disabled. Modified by 1837 -- use of -gnatw.r/.R. 1838 1839 Warn_On_Obsolescent_Feature : Boolean := False; 1840 -- GNAT 1841 -- Set to True to generate warnings on use of any feature in Annex or if a 1842 -- subprogram is called for which a pragma Obsolescent applies. Modified 1843 -- by use of -gnatwj/J. 1844 1845 Warn_On_Overlap : Boolean := False; 1846 -- GNAT 1847 -- Set to True to generate warnings when a writable actual overlaps with 1848 -- another actual in a subprogram call. This applies only in modes before 1849 -- Ada 2012. Starting with Ada 2012, such overlaps are illegal. 1850 -- Modified by use of -gnatw.i/.I. 1851 1852 Warn_On_Questionable_Missing_Parens : Boolean := True; 1853 -- GNAT 1854 -- Set to True to generate warnings for cases where parentheses are missing 1855 -- and the usage is questionable, because the intent is unclear. On by 1856 -- default, modified by use of -gnatwq/Q. 1857 1858 Warn_On_Parameter_Order : Boolean := False; 1859 -- GNAT 1860 -- Set to True to generate warnings for cases where the argument list for 1861 -- a call is a sequence of identifiers that match the formal identifiers, 1862 -- but are in the wrong order. 1863 1864 Warn_On_Redundant_Constructs : Boolean := False; 1865 -- GNAT 1866 -- Set to True to generate warnings for redundant constructs (e.g. useless 1867 -- assignments/conversions). The default is that this warning is disabled. 1868 -- Modified by use of -gnatwr/R. 1869 1870 Warn_On_Reverse_Bit_Order : Boolean := True; 1871 -- GNAT 1872 -- Set to True to generate warning (informational) messages for component 1873 -- clauses that are affected by non-standard bit-order. The default is 1874 -- that this warning is enabled. Modified by -gnatw.v/.V. 1875 1876 Warn_On_Suspicious_Contract : Boolean := True; 1877 -- GNAT 1878 -- Set to True to generate warnings for suspicious contracts expressed as 1879 -- pragmas or aspects precondition and postcondition, as well as other 1880 -- suspicious cases of expressions typically found in contracts like 1881 -- quantified expressions and uses of Update attribute. The default is that 1882 -- this warning is enabled. Modified by use of -gnatw.t/.T. 1883 1884 Warn_On_Suspicious_Modulus_Value : Boolean := True; 1885 -- GNAT 1886 -- Set to True to generate warnings for suspicious modulus values. The 1887 -- default is that this warning is enabled. Modified by -gnatw.m/.M. 1888 1889 Warn_On_Unchecked_Conversion : Boolean := True; 1890 -- GNAT 1891 -- Set to True to generate warnings for unchecked conversions that may have 1892 -- non-portable semantics (e.g. because sizes of types differ). Modified 1893 -- by use of -gnatwz/Z. 1894 1895 Warn_On_Unordered_Enumeration_Type : Boolean := False; 1896 -- GNAT 1897 -- Set to True to generate warnings for inappropriate uses (comparisons 1898 -- and explicit ranges) on unordered enumeration types (which includes 1899 -- all enumeration types for which pragma Ordered is not given). The 1900 -- default is that this warning is disabled. Modified by -gnat.u/.U. 1901 1902 Warn_On_Unrecognized_Pragma : Boolean := True; 1903 -- GNAT 1904 -- Set to True to generate warnings for unrecognized pragmas. The default 1905 -- is that this warning is enabled. Modified by use of -gnatwg/G. 1906 1907 Warn_On_Unrepped_Components : Boolean := False; 1908 -- GNAT 1909 -- Set to True to generate warnings for the case of components of record 1910 -- which have a record representation clause but this component does not 1911 -- have a component clause. Modified by use of -gnatw.c/.C. 1912 1913 Warn_On_Warnings_Off : Boolean := False; 1914 -- GNAT 1915 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent), 1916 -- where either the pragma is never used, or it could be replaced by a 1917 -- pragma Unmodified or Unreferenced. Also generates warnings for pragma 1918 -- Warning (Off, string) which either has no matching pragma Warning On, 1919 -- or where no warning has been suppressed by the use of the pragma. 1920 -- Modified by use of -gnatw.w/.W. 1921 1922 type Warning_Mode_Type is 1923 (Suppress, Normal, Treat_As_Error, Treat_Run_Time_Warnings_As_Errors); 1924 Warning_Mode : Warning_Mode_Type := Normal; 1925 -- GNAT, GNATBIND 1926 -- Controls treatment of warning messages. If set to Suppress, warning 1927 -- messages are not generated at all. In Normal mode, they are generated 1928 -- but do not count as errors. In Treat_As_Error mode, warning messages are 1929 -- generated and treated as errors. In Treat_Run_Time_Warnings_As_Errors, 1930 -- warning messages regarding errors raised at run time are treated as 1931 -- errors. Note that Warning_Mode = Suppress causes pragma Warnings to be 1932 -- ignored (except for legality checks), unless we are in GNATprove_Mode, 1933 -- which requires pragma Warnings to be stored for the formal verification 1934 -- backend. 1935 1936 Warnings_As_Errors_Count : Natural; 1937 -- GNAT 1938 -- Number of entries stored in Warnings_As_Errors table 1939 1940 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets; 1941 -- GNAT, GNATBIND 1942 -- Method used for encoding wide characters in the source program. See 1943 -- description of type in unit System.WCh_Con for a list of the methods 1944 -- that are currently supported. Note that brackets notation is always 1945 -- recognized in source programs regardless of the setting of this 1946 -- variable. The default setting causes only the brackets notation to be 1947 -- recognized. If this is the main unit, this setting also controls the 1948 -- output of the W=? parameter in the ALI file, which is used to provide 1949 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder, 1950 -- the value set here overrides this main unit default. 1951 1952 Wide_Character_Encoding_Method_Specified : Boolean := False; 1953 -- GNAT, GNATBIND 1954 -- Set True if the value in Wide_Character_Encoding_Method was set as 1955 -- a result of an explicit -gnatW? or -W? switch. False otherwise. 1956 1957 Xref_Active : Boolean := True; 1958 -- GNAT 1959 -- Set if cross-referencing is enabled (i.e. xref info in ALI files) 1960 1961 Zero_Formatting : Boolean := False; 1962 -- GNATBIND 1963 -- Do no formatting (no title, no leading spaces, no empty lines) in 1964 -- auxiliary outputs (-e, -K, -l, -R). 1965 1966 ---------------------------- 1967 -- Configuration Settings -- 1968 ---------------------------- 1969 1970 -- These are settings that are used to establish the mode at the start of 1971 -- each unit. The values defined below can be affected either by command 1972 -- line switches, or by the use of appropriate configuration pragmas in a 1973 -- configuration pragma file (but NOT by a local use of a configuration 1974 -- pragma in a single file). 1975 1976 Ada_Version_Config : Ada_Version_Type; 1977 -- GNAT 1978 -- This is the value of the configuration switch for the Ada 83 mode, as 1979 -- set by the command line switches -gnat83/95/2005/2012, and possibly 1980 -- modified by the use of configuration pragmas Ada_*. This switch is used 1981 -- to set the initial value for Ada_Version mode at the start of analysis 1982 -- of a unit. Note however that the setting of this flag is ignored for 1983 -- internal and predefined units (which are always compiled in the most up 1984 -- to date version of Ada). 1985 1986 Ada_Version_Pragma_Config : Node_Id; 1987 -- This will be set nonempty if it is set by a configuration pragma 1988 1989 Ada_Version_Explicit_Config : Ada_Version_Type; 1990 -- GNAT 1991 -- This is set in the same manner as Ada_Version_Config. The difference is 1992 -- that the setting of this flag is not ignored for internal and predefined 1993 -- units, which for some purposes do indeed access this value, regardless 1994 -- of the fact that they are compiled the most up to date ada version). 1995 1996 Assertions_Enabled_Config : Boolean; 1997 -- GNAT 1998 -- This is the value of the configuration switch for assertions enabled 1999 -- mode, as possibly set by the command line switch -gnata, and possibly 2000 -- modified by the use of the configuration pragma Assertion_Policy. 2001 2002 Assume_No_Invalid_Values_Config : Boolean; 2003 -- GNAT 2004 -- This is the value of the configuration switch for assuming "no invalid 2005 -- values enabled" mode, as possibly set by the command line switch 2006 -- -gnatB, and possibly modified by the use of the configuration pragma 2007 -- Assume_No_Invalid_Values. 2008 2009 Check_Float_Overflow_Config : Boolean; 2010 -- GNAT 2011 -- Set to True to check that operations on predefined unconstrained float 2012 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 2013 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 2014 -- of the -gnateF switch. 2015 2016 Check_Policy_List_Config : Node_Id; 2017 -- GNAT 2018 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 2019 -- that are linked through the Next_Pragma fields, with the list being 2020 -- terminated by Empty. The order is most recently processed first. This 2021 -- list includes only those pragmas in configuration pragma files. 2022 2023 Default_Pool_Config : Node_Id := Empty; 2024 -- GNAT 2025 -- Same as Default_Pool above, except this is only for Default_Storage_Pool 2026 -- pragmas that are configuration pragmas. 2027 2028 Default_SSO_Config : Character := ' '; 2029 -- GNAT 2030 -- Set if a pragma Default_Scalar_Storage_Order appears as a configuration 2031 -- pragma. A value of ' ' means that no pragma was given, otherwise the 2032 -- value is 'H' for High_Order_First or 'L' for Low_Order_First. 2033 2034 Dynamic_Elaboration_Checks_Config : Boolean := False; 2035 -- GNAT 2036 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 2037 -- switch or by the use of pragma Elaboration_Checking (Dynamic). 2038 2039 Exception_Locations_Suppressed_Config : Boolean := False; 2040 -- GNAT 2041 -- Set True by use of the configuration pragma Suppress_Exception_Messages 2042 2043 Extensions_Allowed_Config : Boolean; 2044 -- GNAT 2045 -- This is the flag that indicates whether extensions are allowed. It can 2046 -- be set True either by use of the -gnatX switch, or by use of the 2047 -- configuration pragma Extensions_Allowed (On). It is always set to True 2048 -- for internal GNAT units, since extensions are always permitted in such 2049 -- units. 2050 2051 External_Name_Exp_Casing_Config : External_Casing_Type; 2052 -- GNAT 2053 -- This is the value of the configuration switch that controls casing of 2054 -- external symbols for which an explicit external name is given. It can be 2055 -- set to Uppercase by the command line switch -gnatF, and further modified 2056 -- by the use of the configuration pragma External_Name_Casing in the 2057 -- gnat.adc file. This flag is used to set the initial value for 2058 -- External_Name_Exp_Casing at the start of analyzing each unit. Note 2059 -- however that the setting of this flag is ignored for internal and 2060 -- predefined units (which are always compiled with As_Is mode). 2061 2062 External_Name_Imp_Casing_Config : External_Casing_Type; 2063 -- GNAT 2064 -- This is the value of the configuration switch that controls casing of 2065 -- external symbols where the external name is implicitly given. It can be 2066 -- set to Uppercase by the command line switch -gnatF, and further modified 2067 -- by the use of the configuration pragma External_Name_Casing in the 2068 -- gnat.adc file. This flag is used to set the initial value for 2069 -- External_Name_Imp_Casing at the start of analyzing each unit. Note 2070 -- however that the setting of this flag is ignored for internal and 2071 -- predefined units (which are always compiled with Lowercase mode). 2072 2073 Fast_Math_Config : Boolean; 2074 -- GNAT 2075 -- This is the value of the configuration switch that controls Fast_Math 2076 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is 2077 -- used to set the initial value of Fast_Math at the start of each new 2078 -- compilation unit. 2079 2080 Initialize_Scalars_Config : Boolean; 2081 -- GNAT 2082 -- This is the value of the configuration switch that is set by the 2083 -- pragma Initialize_Scalars when it appears in the gnat.adc file. 2084 -- This switch is not set when the pragma appears ahead of a given 2085 -- unit, so it does not affect the compilation of other units. 2086 2087 No_Component_Reordering_Config : Boolean; 2088 -- GNAT 2089 -- This is the value of the configuration switch that is set by the 2090 -- pragma No_Component_Reordering when it appears in the gnat.adc file. 2091 -- This flag is used to set the initial value of No_Component_Reordering 2092 -- at the start of each compilation unit, except that it is always set 2093 -- False for predefined units. 2094 2095 No_Exit_Message : Boolean := False; 2096 -- GNATMAKE, GPRBUILD 2097 -- Set with switch --no-exit-message. When True, if there are compilation 2098 -- failures, the builder does not issue an exit error message. 2099 2100 Optimize_Alignment_Config : Character; 2101 -- GNAT 2102 -- This is the value of the configuration switch that controls the 2103 -- alignment optimization mode, as set by an Optimize_Alignment pragma. 2104 -- It is used to set the initial value of Optimize_Alignment at the start 2105 -- of each new compilation unit, except that it is always set to 'O' (off) 2106 -- for internal units. 2107 2108 Persistent_BSS_Mode_Config : Boolean; 2109 -- GNAT 2110 -- This is the value of the configuration switch that controls whether 2111 -- potentially persistent data is to be placed in the persistent_bss 2112 -- section. It can be set True by use of the pragma Persistent_BSS. 2113 -- This flag is used to set the initial value of Persistent_BSS_Mode 2114 -- at the start of each compilation unit, except that it is always 2115 -- set False for predefined units. 2116 2117 Polling_Required_Config : Boolean; 2118 -- GNAT 2119 -- This is the value of the configuration switch that controls polling 2120 -- mode. It can be set True by the command line switch -gnatP, and then 2121 -- further modified by the use of pragma Polling in the gnat.adc file. This 2122 -- flag is used to set the initial value for Polling_Required at the start 2123 -- of analyzing each unit. 2124 2125 Prefix_Exception_Messages_Config : Boolean; 2126 -- The setting of Prefix_Exception_Messages from configuration pragmas 2127 2128 SPARK_Mode_Config : SPARK_Mode_Type := None; 2129 -- GNAT 2130 -- The setting of SPARK_Mode from configuration pragmas 2131 2132 SPARK_Mode_Pragma_Config : Node_Id := Empty; 2133 -- If a SPARK_Mode pragma appeared in the configuration pragmas (setting 2134 -- SPARK_Mode_Config appropriately), then this points to the N_Pragma node. 2135 2136 Uneval_Old_Config : Character; 2137 -- GNAT 2138 -- The setting of Uneval_Old from configuration pragmas 2139 2140 Use_VADS_Size_Config : Boolean; 2141 -- GNAT 2142 -- This is the value of the configuration switch that controls the use of 2143 -- VADS_Size instead of Size wherever the attribute Size is used. It can 2144 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file. 2145 -- This flag is used to set the initial value for Use_VADS_Size at the 2146 -- start of analyzing each unit. Note however that the setting of this flag 2147 -- is ignored for internal and predefined units (which are always compiled 2148 -- with the standard Size semantics). 2149 2150 Warnings_As_Errors_Count_Config : Natural; 2151 -- GNAT 2152 -- Count of pattern strings stored from Warning_As_Error pragmas 2153 2154 type Config_Switches_Type is private; 2155 -- Type used to save values of the switches set from Config values 2156 2157 procedure Register_Config_Switches; 2158 -- This procedure is called after processing the gnat.adc file and other 2159 -- configuration pragma files to record the values of the Config switches, 2160 -- as possibly modified by the use of command line switches and pragmas 2161 -- appearing in these files. 2162 2163 procedure Restore_Config_Switches (Save : Config_Switches_Type); 2164 -- This procedure restores a set of switch values previously saved by a 2165 -- call to Save_Config_Switches. 2166 2167 function Save_Config_Switches return Config_Switches_Type; 2168 -- Return the current state of all configuration-related attributes 2169 2170 procedure Set_Config_Switches 2171 (Internal_Unit : Boolean; 2172 Main_Unit : Boolean); 2173 -- This procedure sets the switches to the appropriate initial values. The 2174 -- parameter Internal_Unit is True for an internal or predefined unit, and 2175 -- affects the way the switches are set (see above). Main_Unit is true if 2176 -- switches are being set for the main unit or for the spec of the main 2177 -- unit. This affects setting of the assert/debug pragma switches, which 2178 -- are normally set false by default for an internal unit, except when the 2179 -- internal unit is the main unit, in which case we use the command line 2180 -- settings. 2181 2182 ------------------------ 2183 -- Other Global Flags -- 2184 ------------------------ 2185 2186 Building_Static_Dispatch_Tables : Boolean := True; 2187 -- This flag indicates if the backend supports generation of statically 2188 -- allocated dispatch tables. If it is True, then the front end will 2189 -- generate static aggregates for dispatch tables that contain forward 2190 -- references to addresses of subprograms not seen yet, and the back end 2191 -- must be prepared to handle this case. If it is False, then the front 2192 -- end generates assignments to initialize the dispatch table, and there 2193 -- are no such forward references. By default we build statically allocated 2194 -- dispatch tables for all library level tagged types in all platforms.This 2195 -- behavior can be disabled using switch -gnatd.t which will set this flag 2196 -- to False and revert to the previous dynamic behavior. 2197 2198 Expander_Active : Boolean := False; 2199 -- A flag that indicates if expansion is active (True) or deactivated 2200 -- (False). When expansion is deactivated all calls to expander routines 2201 -- have no effect. Note that the initial setting of False is merely to 2202 -- prevent saving of an undefined value for an initial call to the 2203 -- Expander_Mode_Save_And_Set procedure. For more information on the use of 2204 -- this flag, see package Expander. Indeed this flag might more logically 2205 -- be in the spec of Expander, but it is referenced by Errout, and it 2206 -- really seems wrong for Errout to depend on Expander. 2207 2208 ----------------------- 2209 -- Tree I/O Routines -- 2210 ----------------------- 2211 2212 procedure Tree_Read; 2213 -- Reads switch settings from current tree file using Tree_Read 2214 2215 procedure Tree_Write; 2216 -- Writes out switch settings to current tree file using Tree_Write 2217 2218 -------------------------- 2219 -- ASIS Version Control -- 2220 -------------------------- 2221 2222 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number) 2223 -- are supposed to be used in the GNAT/ASIS version check performed in 2224 -- the ASIS code (this package is also a part of the ASIS implementation). 2225 -- They are set by Tree_Read procedure, so they represent the version 2226 -- number (and the version string) of the compiler which has created the 2227 -- tree, and they are supposed to be compared with the corresponding values 2228 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS 2229 -- implementation. 2230 2231 Tree_Version_String : String_Access; 2232 -- Used to store the compiler version string read from a tree file to check 2233 -- if it is from the same date as stored in the version string in Gnatvsn. 2234 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow 2235 -- non-Pro ASIS and ASIS-based tools to be used with any version of the 2236 -- GNAT compiler. Therefore, we need the possibility to compare the dates 2237 -- of the corresponding source sets, using version strings that may be 2238 -- of different lengths. 2239 2240 Tree_ASIS_Version_Number : Int; 2241 -- Used to store the ASIS version number read from a tree file to check if 2242 -- it is the same as stored in the ASIS version number in Tree_IO. 2243 2244 ----------------------------------- 2245 -- Modes for Formal Verification -- 2246 ----------------------------------- 2247 2248 GNATprove_Mode : Boolean := False; 2249 -- Specific compiling mode targeting formal verification for those parts 2250 -- of the input code that belong to the SPARK 2014 subset of Ada. Set True 2251 -- by the gnat2why executable or by use of the -gnatd.F debug switch. Note 2252 -- that this is completely separate from the SPARK restriction defined in 2253 -- GNAT to detect violations of a subset of SPARK 2005 rules. 2254 2255 --------------------------- 2256 -- Error/Warning Control -- 2257 --------------------------- 2258 2259 -- The following array would more reasonably be located in Err_Vars or 2260 -- Errour, but we put them here to deal with licensing issues (we need 2261 -- this to have the GPL exception licensing, since these variables and 2262 -- subprograms are accessed from units with this licensing). 2263 2264 Warnings_As_Errors : array (1 .. 10_000) of String_Ptr; 2265 -- Table for recording Warning_As_Error pragmas as they are processed. 2266 -- It would be nicer to use Table, but there are circular elaboration 2267 -- problems if we try to do this, and an attempt to find some other 2268 -- appropriately licensed unit to declare this as a Table failed with 2269 -- various elaboration circularities. Memory is getting cheap these days! 2270 2271 --------------- 2272 -- GNAT_Mode -- 2273 --------------- 2274 2275 GNAT_Mode : Boolean := False; 2276 -- GNAT 2277 -- True if compiling in GNAT system mode (-gnatg switch) 2278 2279 GNAT_Mode_Config : Boolean := False; 2280 -- GNAT 2281 -- True if -gnatg switch is present. GNAT_Mode may be temporary set to 2282 -- True during the analysis of a system unit, but GNAT_Mode_Config must 2283 -- not change once scanned and set. 2284 2285 -- Setting GNAT mode has the following effects on the language that is 2286 -- accepted. Note that several of the following have the effect of changing 2287 -- an error to a warning. But warnings are usually treated as fatal errors 2288 -- in -gnatg mode, so to actually take advantage of such a change, it is 2289 -- necessary to add an explicit pragma Warnings (Off) in the source and 2290 -- this requires clear documentation of why this is necessary. 2291 2292 -- The identifier character set is set to 'n' (7-bit ASCII) 2293 2294 -- Pragma Extend_System is ignored 2295 2296 -- Warning_Mode is set to Treat_As_Error (-gnatwe) 2297 2298 -- Standard style checks are set (See Set_GNAT_Style_Check_Options) 2299 2300 -- Standard warnings are turned on (see Set_GNAT_Mode_Warnings) 2301 2302 -- The Ada version is set to Ada 2012 2303 2304 -- Task priorities are always allowed to be in the range Any_Priority 2305 2306 -- Overflow checks are suppressed, overflow checking set to strict mode 2307 2308 -- ALI files are always generated for predefined generic packages 2309 2310 -- Obsolescent feature warnings are suppressed 2311 2312 -- Recompilation of children of GNAT, System, Ada, Interfaces is allowed 2313 2314 -- The Scalar_Storage_Order attribute applies to generic types 2315 2316 -- Categorization errors are treated as warnings rather than errors 2317 2318 -- Statements in preelaborated units give warnings rather than errors 2319 2320 -- Private objects are allowed in preelaborated units 2321 2322 -- Non-static constants in preelaborated units give warnings not errors 2323 2324 -- The warning about component size being ignored is suppressed 2325 2326 -- The warning about size clauses being ignored is suppressed 2327 2328 -- Initializing limited types gives a warning rather than an error 2329 2330 -- Copying of limited objects is allowed 2331 2332 -- Returning objects of limited types is allowed 2333 2334 -- Non-static call in preelaborated unit give a warning, not an error 2335 2336 -- Warnings on possible elaboration errors are suppressed 2337 2338 -- Warnings about packing being ignored are suppressed 2339 2340 -- Warnings in internal units are not suppressed (they normally are) 2341 2342 -- The only special comment sequence allowed is --! 2343 2344 -------------------------- 2345 -- Private Declarations -- 2346 -------------------------- 2347 2348private 2349 -- The following type is used to save and restore settings of switches in 2350 -- Opt that represent the configuration (i.e. result of config pragmas). 2351 2352 -- Note that Ada_Version_Explicit is not included, since this is a sticky 2353 -- flag that once set does not get reset, since the whole idea of this flag 2354 -- is to record the setting for the main unit. 2355 2356 type Config_Switches_Type is record 2357 Ada_Version : Ada_Version_Type; 2358 Ada_Version_Explicit : Ada_Version_Type; 2359 Ada_Version_Pragma : Node_Id; 2360 Assertions_Enabled : Boolean; 2361 Assume_No_Invalid_Values : Boolean; 2362 Check_Float_Overflow : Boolean; 2363 Check_Policy_List : Node_Id; 2364 Default_Pool : Node_Id; 2365 Default_SSO : Character; 2366 Dynamic_Elaboration_Checks : Boolean; 2367 Exception_Locations_Suppressed : Boolean; 2368 Extensions_Allowed : Boolean; 2369 External_Name_Exp_Casing : External_Casing_Type; 2370 External_Name_Imp_Casing : External_Casing_Type; 2371 Fast_Math : Boolean; 2372 Initialize_Scalars : Boolean; 2373 No_Component_Reordering : Boolean; 2374 Normalize_Scalars : Boolean; 2375 Optimize_Alignment : Character; 2376 Optimize_Alignment_Local : Boolean; 2377 Persistent_BSS_Mode : Boolean; 2378 Polling_Required : Boolean; 2379 Prefix_Exception_Messages : Boolean; 2380 SPARK_Mode : SPARK_Mode_Type; 2381 SPARK_Mode_Pragma : Node_Id; 2382 Uneval_Old : Character; 2383 Use_VADS_Size : Boolean; 2384 Warnings_As_Errors_Count : Natural; 2385 end record; 2386 2387 -- The following declarations are for GCC version dependent flags. We do 2388 -- not let client code in the compiler test GCC_Version directly, but 2389 -- instead use deferred constants for relevant feature tags. 2390 2391 -- Note: there currently are no such constants defined in this section, 2392 -- since the compiler front end is currently entirely independent of the 2393 -- GCC version, which is a desirable state of affairs. 2394 2395 function get_gcc_version return Int; 2396 pragma Import (C, get_gcc_version, "get_gcc_version"); 2397 2398 GCC_Version : constant Nat := get_gcc_version; 2399 -- GNATMAKE 2400 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that 2401 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported. 2402 2403end Opt; 2404