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 pragma Convention (C, Ada_Version_Type); 128 -- Versions of Ada for Ada_Version below. Note that these are ordered, 129 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful. 130 -- Think twice before using "="; Ada_Version >= Ada_2012 is more likely 131 -- what you want, because it will apply to future versions of the language. 132 133 -- WARNING: There is a matching C declaration of this type in fe.h 134 135 Ada_Version_Default : constant Ada_Version_Type := Ada_2012; 136 pragma Warnings (Off, Ada_Version_Default); 137 -- GNAT 138 -- Default Ada version if no switch given. The Warnings off is to kill 139 -- constant condition warnings. 140 141 Ada_Version : Ada_Version_Type := Ada_Version_Default; 142 -- GNAT 143 -- Current Ada version for compiler, as set by configuration pragmas, 144 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a 145 -- predefined or internal file is compiled. 146 147 -- WARNING: There is a matching C declaration of this variable in fe.h 148 149 Ada_Version_Pragma : Node_Id := Empty; 150 -- Reflects the Ada_xxx pragma that resulted in setting Ada_Version. Used 151 -- to specialize error messages complaining about the Ada version in use. 152 153 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default; 154 -- GNAT 155 -- Like Ada_Version, but does not get set implicitly for predefined or 156 -- internal units, so it reflects the Ada version explicitly set using 157 -- configuration pragmas or compiler switches (or if neither appears, it 158 -- remains set to Ada_Version_Default). This is used in the rare cases 159 -- (notably pragma Obsolescent) where we want the explicit version set. 160 161 Ada_Version_Runtime : Ada_Version_Type := Ada_2012; 162 -- GNAT 163 -- Ada version used to compile the runtime. Used to set Ada_Version (but 164 -- not Ada_Version_Explicit) when compiling predefined or internal units. 165 166 Ada_Final_Suffix : constant String := "final"; 167 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix); 168 -- GNATBIND 169 -- The name of the procedure that performs the finalization at the end of 170 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 171 172 Ada_Init_Suffix : constant String := "init"; 173 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix); 174 -- GNATBIND 175 -- The name of the procedure that performs initialization at the start 176 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 177 178 Ada_Main_Name_Suffix : constant String := "main"; 179 -- GNATBIND 180 -- The suffix for Ada_Main_Name. Defined as a constant here so that it 181 -- can be referenced in a uniform manner to create either the default 182 -- value of Ada_Main_Name (declared below), or the non-default name 183 -- set by Gnatbind.Scan_Bind_Arg. 184 185 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix); 186 -- GNATBIND 187 -- The name of the Ada package generated by the binder (when in Ada mode). 188 -- This variable may be modified by Gnatbind.Scan_Bind_Arg. 189 190 Address_Clause_Overlay_Warnings : Boolean := True; 191 -- GNAT 192 -- Set False to disable address clause warnings. Modified by use of 193 -- -gnatwo/O. 194 195 Address_Is_Private : Boolean := False; 196 -- GNAT, GNATBIND 197 -- Set True if package System has the line "type Address is private;" 198 199 Aggregate_Individually_Assign : Boolean := False; 200 -- GNAT 201 -- Set True if record aggregates are to be always converted into assignment 202 -- statements. Set through the corresponding pragma. 203 204 All_Errors_Mode : Boolean := False; 205 -- GNAT 206 -- Flag set to force display of multiple errors on a single line and 207 -- also repeated error messages for references to undefined identifiers 208 -- and certain other repeated error messages. Set by use of -gnatf. 209 210 Allow_Integer_Address : Boolean := False; 211 -- GNAT 212 -- Allow use of integer expression in a context requiring System.Address. 213 -- Set by the use of configuration pragma Allow_Integer_Address Also set 214 -- in relaxed semantics mode for use by CodePeer or when -gnatd.M is used. 215 216 All_Sources : Boolean := False; 217 -- GNATBIND 218 -- Set to True to require all source files to be present. This flag is 219 -- directly modified by gnatmake to affect the shared binder routines. 220 221 Alternate_Main_Name : String_Ptr := null; 222 -- GNATBIND 223 -- Set to non-null when Bind_Alternate_Main_Name is True. This value 224 -- is modified as needed by Gnatbind.Scan_Bind_Arg. 225 226 ASIS_GNSA_Mode : Boolean := False; 227 -- GNAT 228 -- Enable GNSA back-end processing assuming ASIS_Mode is already set to 229 -- True. ASIS_GNSA mode suppresses the call to gigi. 230 231 ASIS_Mode : Boolean := False; 232 -- GNAT 233 -- Enable semantic checks and tree transformations that are important 234 -- for ASIS but that are usually skipped if Operating_Mode is set to 235 -- Check_Semantics. This flag does not have the corresponding option to set 236 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON 237 -- from the code of GNSA-based tool (a client may need to set ON the 238 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not 239 -- make very much sense, because GNSA cannot do back annotation). 240 241 Assertions_Enabled : Boolean := False; 242 -- GNAT 243 -- Indicates default policy (True = Check, False = Ignore) to be applied 244 -- to all assertion aspects and pragmas, and to pragma Debug, if there is 245 -- no overriding Assertion_Policy, Check_Policy, or Debug_Policy pragma. 246 -- Set True by use of -gnata. 247 248 Assume_No_Invalid_Values : Boolean := False; 249 -- GNAT Normally, in accordance with (RM 13.9.1 (9-11)) the front end 250 -- assumes that values could have invalid representations, unless it can 251 -- clearly prove that the values are valid. If this switch is set (by 252 -- pragma Assume_No_Invalid_Values (On)), then the compiler assumes values 253 -- are valid and in range of their representations. This feature is now 254 -- fully enabled in the compiler. 255 256 Back_Annotate_Rep_Info : Boolean := False; 257 -- GNAT 258 -- If set True, enables back annotation of representation information 259 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR 260 -- (list representation information) or -gnatt (generate tree). It is 261 -- also set true if certain Unchecked_Conversion instantiations require 262 -- checking based on annotated values. 263 264 Back_End_Handles_Limited_Types : Boolean; 265 -- This flag is set true if the back end can properly handle limited or 266 -- other by reference types, and avoid copies. If this flag is False, then 267 -- the front end does special expansion for if/case expressions to make 268 -- sure that no copy occurs. If the flag is True, then the expansion for 269 -- if and case expressions relies on the back end properly handling things. 270 -- Currently the default is False for all cases (set in gnat1drv). The 271 -- default can be modified using -gnatd.L (sets the flag True). This is 272 -- used to test the possibility of having the backend handle this. 273 274 Back_End_Inlining : Boolean := False; 275 -- GNAT 276 -- Set True to activate inlining by back-end expansion. This is the normal 277 -- default mode for gcc targets, so it is True on such targets unless the 278 -- switches -gnatN or -gnatd.z are used. See circuitry in gnat1drv for the 279 -- exact conditions for setting this switch. 280 281 -- WARNING: There is a matching C declaration of this variable in fe.h 282 283 Bind_Alternate_Main_Name : Boolean := False; 284 -- GNATBIND 285 -- True if main should be called Alternate_Main_Name.all. 286 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg. 287 288 Bind_Main_Program : Boolean := True; 289 -- GNATBIND 290 -- Set to False if not binding main Ada program 291 292 Bind_For_Library : Boolean := False; 293 -- GNATBIND 294 -- Set to True if the binder needs to generate a file designed for building 295 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg. 296 297 Bind_Only : Boolean := False; 298 -- GNATMAKE, GPRBUILD 299 -- Set to True to skip compile and link steps 300 -- (except when Compile_Only and/or Link_Only are True). 301 302 Blank_Deleted_Lines : Boolean := False; 303 -- GNAT, GNATPREP 304 -- Output empty lines for each line of preprocessed input that is deleted 305 -- in the output, including preprocessor lines starting with a '#'. 306 307 Brief_Output : Boolean := False; 308 -- GNAT, GNATBIND 309 -- Force brief error messages to standard error, even if verbose mode is 310 -- set (so that main error messages go to standard output). 311 312 Build_Bind_And_Link_Full_Project : Boolean := False; 313 -- GNATMAKE 314 -- Set to True to build, bind and link all the sources of a project file 315 -- (switch -B) 316 317 Check_Aliasing_Of_Parameters : Boolean := False; 318 -- GNAT 319 -- Set to True to detect whether subprogram parameters and function results 320 -- alias the same object(s). 321 322 Check_Float_Overflow : Boolean := False; 323 -- GNAT 324 -- Set to True to check that operations on predefined unconstrained float 325 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 326 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 327 -- of the -gnateF switch. 328 329 Check_Object_Consistency : Boolean := False; 330 -- GNATBIND, GNATMAKE 331 -- Set to True to check whether every object file is consistent with its 332 -- corresponding ada library information (ALI) file. An object file is 333 -- inconsistent with the corresponding ALI file if the object file does 334 -- not exist or if it has an older time stamp than the ALI file. Default 335 -- above is for GNATBIND. GNATMAKE overrides this default to True (see 336 -- Make.Initialize) since we normally do need to check source consistencies 337 -- in gnatmake. 338 339 Check_Only : Boolean := False; 340 -- GNATBIND 341 -- Set to True to do checks only, no output of binder file 342 343 Check_Policy_List : Node_Id := Empty; 344 -- GNAT 345 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 346 -- that are linked through the Next_Pragma fields, with the list being 347 -- terminated by Empty. The order is most recently processed first. Note 348 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value 349 -- of this variable, implementing the required scope control for pragmas 350 -- appearing in a declarative part. 351 352 Check_Readonly_Files : Boolean := False; 353 -- GNATMAKE 354 -- Set to True to check readonly files during the make process 355 356 Check_Source_Files : Boolean := True; 357 -- GNATBIND, GNATMAKE 358 -- Set to True to enable consistency checking for any source files that 359 -- are present (i.e. date must match the date in the library info file). 360 -- Set to False for object file consistency check only. This flag is 361 -- directly modified by gnatmake, to affect the shared binder routines. 362 363 Check_Switches : Boolean := False; 364 -- GNATMAKE, GPBUILD 365 -- Set to True to check compiler options during the make process 366 367 Check_Unreferenced : Boolean := False; 368 -- GNAT 369 -- Set to True to enable checking for unreferenced entities other 370 -- than formal parameters (for which see Check_Unreferenced_Formals) 371 -- Modified by use of -gnatwu/U. 372 373 Check_Unreferenced_Formals : Boolean := False; 374 -- GNAT 375 -- Set to True to check for unreferenced formals. This is turned on by 376 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU. 377 378 Check_Validity_Of_Parameters : Boolean := False; 379 -- GNAT 380 -- Set to True to check for proper scalar initialization of subprogram 381 -- parameters on both entry and exit. This is turned on by -gnateV. 382 383 Check_Withs : Boolean := False; 384 -- GNAT 385 -- Set to True to enable checking for unused withs, and also the case 386 -- of withing a package and using none of the entities in the package. 387 -- Modified by use of -gnatwu/U. 388 389 CodePeer_Mode : Boolean := False; 390 -- GNAT, GNATBIND, GPRBUILD 391 -- Enable full CodePeer mode (SCIL generation, disable switches that 392 -- interact badly with it, etc...). This is turned on by -gnatC. 393 394 Commands_To_Stdout : Boolean := False; 395 -- GNATMAKE 396 -- True if echoed commands to be written to stdout instead of stderr 397 398 Comment_Deleted_Lines : Boolean := False; 399 -- GNATPREP 400 -- True if source lines removed by the preprocessor should be commented 401 -- in the output file. 402 403 Compilation_Time : String (1 .. 19); 404 -- GNAT 405 -- Compilation date and time in form YYYY-MM-DD HH:MM:SS 406 407 Compile_Only : Boolean := False; 408 -- GNATMAKE, GNATCLEAN, GPBUILD, GPRCLEAN 409 -- GNATMAKE, GPRBUILD: 410 -- set True to skip bind and link steps (except when Bind_Only is True) 411 -- GNATCLEAN, GPRCLEAN: 412 -- set True to delete only the files produced by the compiler but not the 413 -- library files or the executable files. 414 415 Compiler_Unit : Boolean := False; 416 -- GNAT1 417 -- Set True by an occurrence of pragma Compiler_Unit_Warning (or of the 418 -- obsolete pragma Compiler_Unit) in the main unit. Once set True, stays 419 -- True, since any units that are with'ed directly or indirectly by 420 -- a Compiler_Unit_Warning main unit are subject to the same restrictions. 421 -- Such units really should have their own pragmas, but we do not bother to 422 -- check for that, so this transitivity provides extra checking. 423 424 Config_File : Boolean := True; 425 -- GNAT 426 -- Set to False to inhibit reading and processing of gnat.adc file 427 428 Config_File_Names : String_List_Access := null; 429 -- GNAT 430 -- Names of configuration pragmas files (given by switches -gnatec) 431 432 Configurable_Run_Time_Mode : Boolean := False; 433 -- GNAT, GNATBIND 434 -- Set True if the compiler is operating in configurable run-time mode. 435 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target 436 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind 437 -- for details on the handling of the latter pragma. 438 439 Constant_Condition_Warnings : Boolean := False; 440 -- GNAT 441 -- Set to True to activate warnings on constant conditions. Modified by 442 -- use of -gnatwc/C. 443 444 Create_Mapping_File : Boolean := False; 445 -- GNATMAKE 446 -- Set to True (-C switch) to indicate that the compiler will be invoked 447 -- with a mapping file (-gnatem compiler switch). 448 449 subtype Debug_Level_Value is Nat range 0 .. 3; 450 Debugger_Level : Debug_Level_Value := 0; 451 -- GNAT, GNATBIND 452 -- The value given to the -g parameter. The default value for -g with 453 -- no value is 2. If no -g is specified, defaults to 0. 454 -- Note that the generated code should never depend on this variable, 455 -- since we want debug info to be nonintrusive on the generate code. 456 457 Default_Exit_Status : Int := 0; 458 -- GNATBIND 459 -- Set the default exit status value. Set by the -Xnnn switch for the 460 -- binder. 461 462 Debug_Generated_Code : Boolean := False; 463 -- GNAT 464 -- Set True (-gnatD switch) to debug generated expanded code instead 465 -- of the original source code. Causes debugging information to be 466 -- written with respect to the generated code file that is written. 467 468 -- WARNING: There is a matching C declaration of this variable in fe.h 469 470 Default_Pool : Node_Id := Empty; 471 -- GNAT 472 -- Used to record the storage pool name (or null literal) that is the 473 -- argument of an applicable pragma Default_Storage_Pool. 474 -- Empty: No pragma Default_Storage_Pool applies. 475 -- N_Null node: "pragma Default_Storage_Pool (null);" applies. 476 -- otherwise: "pragma Default_Storage_Pool (X);" applies, and 477 -- this points to the name X. 478 -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value. 479 480 No_Stack_Size : constant := -1; 481 482 Default_Stack_Size : Int := No_Stack_Size; 483 -- GNATBIND 484 -- Set to default primary stack size in units of bytes. Set by the -dnnn 485 -- switch for the binder. A value of No_Stack_Size indicates that 486 -- no default was set by the binder. 487 488 Default_Sec_Stack_Size : Int := No_Stack_Size; 489 -- GNATBIND 490 -- Set to default secondary stack size in units of bytes. Set by the -Dnnn 491 -- switch for the binder. A value of No_Stack_Size indicates that no 492 -- default was set by the binder and the run-time value should be used 493 -- instead. 494 495 Default_SSO : Character := ' '; 496 -- GNAT 497 -- Set if a pragma Default_Scalar_Storage_Order has been given. The value 498 -- of ' ' indicates that no default has been set, otherwise the value is 499 -- either 'H' for High_Order_First or 'L' for Lower_Order_First. 500 501 Detect_Blocking : Boolean := False; 502 -- GNAT 503 -- Set True to force the run time to raise Program_Error if calls to 504 -- potentially blocking operations are detected from protected actions. 505 506 Directories_Must_Exist_In_Projects : Boolean := True; 507 -- PROJECT MANAGER 508 -- Set to False with switch -f of gnatclean and gprclean 509 510 Display_Compilation_Progress : Boolean := False; 511 -- GNATMAKE, GPRBUILD 512 -- Set True (-d switch) to display information on progress while compiling 513 -- files. Internal flag to be used in conjunction with an IDE 514 -- (e.g GNAT Studio). 515 516 type Distribution_Stub_Mode_Type is 517 -- GNAT 518 (No_Stubs, 519 -- Normal mode, no generation of distribution stubs 520 521 Generate_Receiver_Stub_Body, 522 -- The unit being compiled is the RCI body, and the compiler will 523 -- generate the body for the receiver stubs and compile it. 524 525 Generate_Caller_Stub_Body); 526 -- The unit being compiled is the RCI spec, and the compiler will 527 -- generate the body for the caller stubs and compile it. 528 529 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs; 530 -- GNAT 531 -- This enumeration variable indicates the three states of distribution 532 -- annex stub generation. 533 534 Do_Not_Execute : Boolean := False; 535 -- GNATMAKE 536 -- Set to True if no actual compilations should be undertaken 537 538 Dump_Source_Text : Boolean := False; 539 -- GNAT 540 -- Set to True (by -gnatL) to dump source text intermingled with generated 541 -- code. Effective only if either of Debug/Print_Generated_Code is true. 542 543 Dynamic_Elaboration_Checks : Boolean := False; 544 -- GNAT 545 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 546 -- switch or by the use of pragma Elaboration_Checks (Dynamic). 547 548 Dynamic_Stack_Measurement : Boolean := False; 549 -- GNATBIND 550 -- Set True to enable dynamic stack measurement (-u flag for gnatbind) 551 552 Dynamic_Stack_Measurement_Array_Size : Nat := 100; 553 -- GNATBIND 554 -- Number of measurements we want to store during dynamic stack analysis. 555 -- When the buffer is full, non-storable results will be output on the fly. 556 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set 557 -- by processing of -u flag for gnatbind. 558 559 Elab_Dependency_Output : Boolean := False; 560 -- GNATBIND 561 -- Set to True to output complete list of elaboration constraints 562 563 Elab_Order_Output : Boolean := False; 564 -- GNATBIND 565 -- Set to True to output chosen elaboration order 566 567 Elab_Info_Messages : Boolean := False; 568 -- GNAT 569 -- Set to True to output info messages for static elabmodel (-gnatel) 570 571 Elab_Warnings : Boolean := True; 572 -- GNAT 573 -- Set to True to generate elaboration warnings (-gnatwl). The warnings are 574 -- enabled by default because they carry the same importance as errors. The 575 -- compiler cannot emit actual errors because elaboration diagnostics need 576 -- dataflow analysis, which is not available. This behavior parallels that 577 -- of the old ABE mechanism. 578 579 Error_Msg_Line_Length : Nat := 0; 580 -- GNAT 581 -- Records the error message line length limit. If this is set to zero, 582 -- then we get the old style behavior, in which each call to the error 583 -- message routines generates one line of output as a separate message. 584 -- If it is set to a non-zero value, then continuation lines are folded 585 -- to make a single long message, and then this message is split up into 586 -- multiple lines not exceeding the specified length. Set by -gnatj=nn. 587 588 Error_To_Warning : Boolean := False; 589 -- GNAT 590 -- If True, then certain error messages (e.g. parameter overlap messages 591 -- for procedure calls in Ada 2012 mode) are treated as warnings instead 592 -- of errors. Set by debug flag -gnatd.E. A search for Error_To_Warning 593 -- will identify affected messages. 594 595 Exception_Handler_Encountered : Boolean := False; 596 -- GNAT 597 -- This flag is set true if the parser encounters an exception handler. 598 -- It is used to set Warn_On_Exception_Propagation True if the restriction 599 -- No_Exception_Propagation is set. 600 601 Exception_Extra_Info : Boolean := False; 602 -- GNAT 603 -- True when switch -gnateE is used. When True, generate extra information 604 -- associated with exception messages (in particular range and index 605 -- checks). 606 607 -- WARNING: There is a matching C declaration of this variable in fe.h 608 609 Exception_Locations_Suppressed : Boolean := False; 610 -- GNAT 611 -- Set to True if a Suppress_Exception_Locations configuration pragma is 612 -- currently active. 613 614 -- WARNING: There is a matching C declaration of this variable in fe.h 615 616 type Exception_Mechanism_Type is 617 -- Determines the kind of mechanism used to handle exceptions 618 -- 619 (Front_End_SJLJ, 620 -- Exceptions use setjmp/longjmp generated explicitly by the front end 621 -- (this includes gigi or other equivalent parts of the code generator). 622 -- AT END handlers are converted into exception handlers by the front 623 -- end in this mode. 624 625 Back_End_ZCX, 626 -- Exceptions are handled by the back end. The front end simply 627 -- generates the handlers as they appear in the source, and AT END 628 -- handlers are left untouched (they are not converted into exception 629 -- handlers when operating in this mode). Propagation is performed 630 -- using a frame unwinding scheme and requires no particular setup code 631 -- at handler sites on regular execution paths. 632 633 Back_End_SJLJ); 634 -- Similar to Back_End_ZCX with respect to the front-end processing 635 -- of regular and AT-END handlers. A setjmp/longjmp scheme is used to 636 -- propagate and setup handler contexts on regular execution paths. 637 pragma Convention (C, Exception_Mechanism_Type); 638 639 -- WARNING: There is a matching C declaration of this type in fe.h 640 641 Exception_Mechanism : Exception_Mechanism_Type := Front_End_SJLJ; 642 -- GNAT 643 -- Set to the appropriate value depending on the flags in system.ads 644 -- (Frontend_Exceptions + ZCX_By_Default). The C convention is there to 645 -- allow access by gigi. 646 647 -- WARNING: There is a matching C declaration of this variable in fe.h 648 649 function Back_End_Exceptions return Boolean; 650 function Front_End_Exceptions return Boolean; 651 function ZCX_Exceptions return Boolean; 652 function SJLJ_Exceptions return Boolean; 653 -- GNAT 654 -- Various properties of the active Exception_Mechanism 655 656 -- WARNING: There is a matching C declaration of these subprograms in fe.h 657 658 Exception_Tracebacks : Boolean := False; 659 -- GNATBIND 660 -- Set to True to store tracebacks in exception occurrences (-Ea or -E) 661 662 Exception_Tracebacks_Symbolic : Boolean := False; 663 -- GNATBIND 664 -- Set to True to store tracebacks in exception occurrences and enable 665 -- symbolic tracebacks (-Es). 666 667 Expand_Nonbinary_Modular_Ops : Boolean := False; 668 -- Set to True to convert nonbinary modular additions into code 669 -- that relies on the front-end expansion of operator Mod. 670 671 Extensions_Allowed : Boolean := False; 672 -- GNAT 673 -- Set to True by switch -gnatX if GNAT specific language extensions 674 -- are allowed. Currently there are no such defined extensions. 675 676 type External_Casing_Type is ( 677 As_Is, -- External names cased as they appear in the Ada source 678 Uppercase, -- External names forced to all uppercase letters 679 Lowercase); -- External names forced to all lowercase letters 680 681 External_Name_Imp_Casing : External_Casing_Type := Lowercase; 682 -- GNAT 683 -- The setting of this flag determines the casing of external names 684 -- when the name is implicitly derived from an entity name (i.e. either 685 -- no explicit External_Name or Link_Name argument is used, or, in the 686 -- case of extended DEC pragmas, the external name is given using an 687 -- identifier. The As_Is setting is not permitted here (since this would 688 -- create Ada source programs that were case sensitive). 689 690 External_Name_Exp_Casing : External_Casing_Type := As_Is; 691 -- GNAT 692 -- The setting of this flag determines the casing of an external name 693 -- specified explicitly with a string literal. As_Is means the string 694 -- literal is used as given with no modification to the casing. If 695 -- Lowercase or Uppercase is set, then the string is forced to all 696 -- lowercase or all uppercase letters as appropriate. Note that this 697 -- setting has no effect if the external name is given using an identifier 698 -- in the case of extended DEC import/export pragmas (in this case the 699 -- casing is controlled by External_Name_Imp_Casing), and also has no 700 -- effect if an explicit Link_Name is supplied (a link name is always 701 -- used exactly as given). 702 703 External_Unit_Compilation_Allowed : Boolean := False; 704 -- GNATMAKE 705 -- When True (set by gnatmake switch -x), allow compilation of sources 706 -- that are not part of any project file. 707 708 Fast_Math : Boolean := False; 709 -- GNAT 710 -- Indicates the current setting of Fast_Math mode, as set by the use 711 -- of a Fast_Math pragma (set True by Fast_Math (On)). 712 713 Force_ALI_Tree_File : Boolean := False; 714 -- GNAT 715 -- Force generation of ALI file even if errors are encountered. Also forces 716 -- generation of tree file if -gnatt is also set. Set on by use of -gnatQ. 717 718 Disable_ALI_File : Boolean := False; 719 -- GNAT 720 -- Disable generation of ALI file 721 722 Follow_Links_For_Files : Boolean := False; 723 -- PROJECT MANAGER 724 -- Set to True (-eL) to process the project files in trusted mode. If 725 -- Follow_Links is False, it is assumed that the project doesn't contain 726 -- any file duplicated through symbolic links (although the latter are 727 -- still valid if they point to a file which is outside of the project), 728 -- and that no directory has a name which is a valid source name. 729 730 Follow_Links_For_Dirs : Boolean := False; 731 -- PROJECT MANAGER 732 -- Set to True if directories can be links in this project, and therefore 733 -- additional system calls must be performed to ensure that we always see 734 -- the same full name for each directory. 735 736 Force_Checking_Of_Elaboration_Flags : Boolean := False; 737 -- GNATBIND 738 -- True if binding with forced checking of the elaboration flags 739 -- (-F switch set). 740 741 Force_Compilations : Boolean := False; 742 -- GNATMAKE, GPRBUILD 743 -- Set to force recompilations even when the objects are up-to-date. 744 745 Force_Elab_Order_File : String_Ptr := null; 746 -- GNATBIND 747 -- File name specified for -f switch (the forced elaboration order file) 748 749 Front_End_Inlining : Boolean := False; 750 -- GNAT 751 -- Set True to activate inlining by front-end expansion (even on GCC 752 -- targets, where inlining is normally handled by the back end). Set by 753 -- the flag -gnatN (which is now considered obsolescent, since the GCC 754 -- back end can do a better job of inlining than the front end these days). 755 756 Full_Path_Name_For_Brief_Errors : Boolean := False; 757 -- PROJECT MANAGER 758 -- When True, in Brief_Output mode, each error message line will start with 759 -- the full path name of the source. When False, only the file name without 760 -- directory information is used. 761 762 Full_List : Boolean := False; 763 -- GNAT 764 -- Set True to generate full source listing with embedded errors 765 766 Full_List_File_Name : String_Ptr := null; 767 -- GNAT 768 -- Set to file name to generate full source listing to named file (or if 769 -- the name is of the form .xxx, then to name.xxx where name is the source 770 -- file name with extension stripped. 771 772 Generate_C_Code : Boolean := False; 773 -- GNAT, GNATBIND 774 -- If True, the Cprint circuitry to generate C code output is activated. 775 -- Set True by use of -gnateg or -gnatd.V for GNAT, and -G for GNATBIND. 776 777 Generate_CodePeer_Messages : Boolean := False; 778 -- GNAT 779 -- Generate CodePeer messages. Ignored if CodePeer_Mode is false. This is 780 -- turned on by -gnateC. 781 782 Generate_Processed_File : Boolean := False; 783 -- GNAT 784 -- True when switch -gnateG is used. When True, create in a file 785 -- <source>.prep, if the source is preprocessed. 786 787 Generate_SCIL : Boolean := False; 788 -- GNAT 789 -- Set True to activate SCIL code generation. 790 791 Generate_SCO : Boolean := False; 792 -- GNAT 793 -- True when switch -fdump-scos (or -gnateS) is used. When True, Source 794 -- Coverage Obligation (SCO) information is generated and output in the ALI 795 -- file. See unit Par_SCO for full details. 796 797 Generate_SCO_Instance_Table : Boolean := False; 798 -- GNAT 799 -- True when switch -fdump-scos is used. When True, a table of instances is 800 -- included in SCOs. 801 802 -- WARNING: There is a matching C declaration of this variable in fe.h 803 804 Generating_Code : Boolean := False; 805 -- GNAT 806 -- True if the frontend finished its work and has called the backend to 807 -- process the tree and generate the object file. 808 809 type Ghost_Mode_Type is (None, Check, Ignore); 810 -- Possible legal modes that can be set by aspect/pragma Ghost as well as 811 -- value None, which indicates that no such aspect/pragma applies. 812 813 Ghost_Mode : Ghost_Mode_Type := None; 814 -- GNAT 815 -- The current Ghost mode in effect 816 817 Global_Discard_Names : Boolean := False; 818 -- GNAT, GNATBIND 819 -- True if a pragma Discard_Names appeared as a configuration pragma for 820 -- the current compilation unit. 821 822 GNAT_Encodings : Int; 823 pragma Import (C, GNAT_Encodings, "gnat_encodings"); 824 -- Constant controlling the balance between GNAT encodings and standard 825 -- DWARF to emit in the debug information. It accepts the following values. 826 827 DWARF_GNAT_Encodings_All : constant Int := 0; 828 DWARF_GNAT_Encodings_GDB : constant Int := 1; 829 DWARF_GNAT_Encodings_Minimal : constant Int := 2; 830 831 Identifier_Character_Set : Character; 832 -- GNAT 833 -- This variable indicates the character set to be used for identifiers. 834 -- The possible settings are: 835 -- '1' Latin-1 (ISO-8859-1) 836 -- '2' Latin-2 (ISO-8859-2) 837 -- '3' Latin-3 (ISO-8859-3) 838 -- '4' Latin-4 (ISO-8859-4) 839 -- '5' Latin-Cyrillic (ISO-8859-5) 840 -- '9' Latin-9 (ISO-8859-15) 841 -- 'p' PC (US, IBM page 437) 842 -- '8' PC (European, IBM page 850) 843 -- 'f' Full upper set (all distinct) 844 -- 'n' No upper characters (Ada 83 rules) 845 -- 'w' Latin-1 plus wide characters allowed in identifiers 846 -- 847 -- The setting affects the set of letters allowed in identifiers and the 848 -- upper/lower case equivalences. It does not affect the interpretation of 849 -- character and string literals, which are always stored using the actual 850 -- coding in the source program. This variable is initialized to the 851 -- default value appropriate to the system (in Osint.Initialize), and then 852 -- reset if a command line switch is used to change the setting. 853 854 Ignore_Rep_Clauses : Boolean := False; 855 -- GNAT 856 -- Set True to ignore all representation clauses. Useful when compiling 857 -- code from foreign compilers for checking or ASIS purposes. Can be 858 -- set True by use of -gnatI. 859 860 Ignore_SPARK_Mode_Pragmas_In_Instance : Boolean := False; 861 -- GNAT 862 -- Set True to ignore the semantics and effects of pragma SPARK_Mode when 863 -- the pragma appears inside an instance whose enclosing context is subject 864 -- to SPARK_Mode "off". This property applies to nested instances. 865 866 Ignore_Style_Checks_Pragmas : Boolean := False; 867 -- GNAT 868 -- Set True to ignore all Style_Checks pragmas. Can be set True by use 869 -- of -gnateY. 870 871 Ignore_Unrecognized_VWY_Switches : Boolean := False; 872 -- GNAT 873 -- Set True to ignore unrecognized y, V, w switches. Can be set True by 874 -- use of -gnateu, causing subsequent unrecognized switches to result in 875 -- a warning rather than an error. 876 877 Ignored_Ghost_Region : Node_Id := Empty; 878 -- GNAT 879 -- The start of the current ignored Ghost region. This value must always 880 -- reflect the starting node of the outermost ignored Ghost region. If a 881 -- nested ignored Ghost region is entered, the value must remain unchanged. 882 883 Implementation_Unit_Warnings : Boolean := True; 884 -- GNAT 885 -- Set True to active warnings for use of implementation internal units. 886 -- Modified by use of -gnatwi/-gnatwI. 887 888 Implicit_Packing : Boolean := False; 889 -- GNAT 890 -- If set True, then a Size attribute clause on an array is allowed to 891 -- cause implicit packing instead of generating an error message. Set by 892 -- use of pragma Implicit_Packing. 893 894 Include_Subprogram_In_Messages : Boolean := False; 895 -- GNAT 896 -- Set True to include the enclosing subprogram in compiler messages. 897 898 Ineffective_Inline_Warnings : Boolean := False; 899 -- GNAT 900 -- Set True to activate warnings if front-end inlining (-gnatN) is not able 901 -- to actually inline a particular call (or all calls). Can be controlled 902 -- by use of -gnatwp/-gnatwP. Also set True to activate warnings if 903 -- frontend inlining is not able to inline a subprogram expected to 904 -- be inlined in GNATprove mode. 905 906 Init_Or_Norm_Scalars : Boolean := False; 907 -- GNAT, GNATBIND 908 -- Set True if a pragma Initialize_Scalars applies to the current unit. 909 -- Also set True if a pragma Restriction (Normalize_Scalars) applies. 910 911 Initialize_Scalars : Boolean := False; 912 -- GNAT 913 -- Set True if a pragma Initialize_Scalars applies to the current unit. 914 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 915 916 Initialize_Scalars_Mode1 : Character := 'I'; 917 Initialize_Scalars_Mode2 : Character := 'N'; 918 -- GNATBIND 919 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default 920 -- is IN (invalid values), used if no -S switch is used. 921 922 Inline_Active : Boolean := False; 923 -- GNAT 924 -- Set True to activate pragma Inline processing across modules. Default 925 -- for now is not to inline across module boundaries. 926 927 Inline_Level : Nat := 0; 928 -- GNAT 929 -- Set to indicate the inlining level: 0 means that an appropriate value is 930 -- to be computed by the compiler based on the optimization level (-gnatn), 931 -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full 932 -- inlining across modules (-gnatn2). 933 934 Interface_Library_Unit : Boolean := False; 935 -- GNATBIND 936 -- Set to True to indicate that at least one ALI file is an interface ALI: 937 -- then elaboration flag checks are to be generated in the binder 938 -- generated file. 939 940 Invalid_Value_Used : Boolean := False; 941 -- GNAT 942 -- Set True if a valid Invalid_Value attribute is encountered 943 944 Inline_Processing_Required : Boolean := False; 945 -- GNAT 946 -- Set True if inline processing is required. Inline processing is required 947 -- if an active Inline pragma is processed. The flag is set for a pragma 948 -- Inline or Inline_Always that is actually active. 949 950 In_Place_Mode : Boolean := False; 951 -- GNATMAKE 952 -- Set True to store ALI and object files in place i.e. in the object 953 -- directory if these files already exist or in the source directory 954 -- if not. 955 956 Keep_Going : Boolean := False; 957 -- GNATMAKE, GPRBUILD 958 -- When True signals to ignore compilation errors and keep processing 959 -- sources until there is no more work. 960 961 Keep_Temporary_Files : Boolean := False; 962 -- GNATCMD, GNATMAKE, GPRBUILD 963 -- When True the temporary files are not deleted. Set by switches -dn or 964 -- --keep-temp-files. 965 966 Leap_Seconds_Support : Boolean := False; 967 -- GNATBIND 968 -- Set to True to enable leap seconds support in Ada.Calendar and its 969 -- children. 970 971 Legacy_Elaboration_Checks : Boolean := False; 972 -- GNAT 973 -- Set to True when the pre-18.x access-before-elaboration model is to be 974 -- used. Modified by use of -gnatH. 975 976 Legacy_Elaboration_Order : Boolean := False; 977 -- GNATBIND 978 -- Set to True when the pre-20.x elaboration-order model is to be used. 979 -- Modified by use of -H. 980 981 Link_Only : Boolean := False; 982 -- GNATMAKE, GPRBUILD 983 -- Set to True to skip compile and bind steps (except when Bind_Only is 984 -- set to True). 985 986 List_Body_Required_Info : Boolean := False; 987 -- GNATMAKE 988 -- List info messages about why a package requires a body. Modified by use 989 -- of -gnatw.y/.Y. 990 991 List_Inherited_Aspects : Boolean := False; 992 -- GNAT 993 -- List inherited invariants, preconditions, and postconditions from 994 -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited 995 -- subtype predicates. Modified by use of -gnatw.l/.L. 996 997 List_Restrictions : Boolean := False; 998 -- GNATBIND 999 -- Set to True to list restrictions pragmas that could apply to partition 1000 1001 List_Units : Boolean := False; 1002 -- GNAT 1003 -- List units in the active library for a compilation (-gnatu switch) 1004 1005 List_Closure : Boolean := False; 1006 -- GNATBIND 1007 -- List all sources in the closure of a main (-R or -Ra gnatbind switch) 1008 1009 List_Closure_All : Boolean := False; 1010 -- GNATBIND 1011 -- List all sources in closure of main including run-time units (-Ra 1012 -- gnatbind switch). 1013 1014 List_Dependencies : Boolean := False; 1015 -- GNATMAKE 1016 -- When True gnatmake verifies that the objects are up to date and outputs 1017 -- the list of object dependencies (-M switch). Output depends if -a switch 1018 -- is used or not. This list can be used directly in a Makefile. 1019 1020 List_Representation_Info : Int range 0 .. 4 := 0; 1021 -- GNAT 1022 -- Set non-zero by -gnatR switch to list representation information. 1023 -- The settings are as follows: 1024 -- 1025 -- 0 = no listing of representation information (default as above) 1026 -- 1 = list rep info for user-defined record and array types 1027 -- 2 = list rep info for all user-defined types and objects 1028 -- 3 = like 2, but variable fields are decoded symbolically 1029 -- 4 = like 3, but list rep info for relevant compiler-generated types 1030 1031 -- WARNING: There is a matching C declaration of this variable in fe.h 1032 1033 List_Representation_Info_To_File : Boolean := False; 1034 -- GNAT 1035 -- Set true by -gnatRs switch. Causes information from -gnatR[1-4]m to be 1036 -- written to file.rep (where file is the name of the source file) instead 1037 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then 1038 -- representation info is written to x.adb.ref. 1039 1040 List_Representation_Info_To_JSON : Boolean := False; 1041 -- GNAT 1042 -- Set true by -gnatRj switch. Causes information from -gnatR[1-4]m to be 1043 -- output in the JSON data interchange format. 1044 1045 List_Representation_Info_Mechanisms : Boolean := False; 1046 -- GNAT 1047 -- Set true by -gnatRm switch. Causes information on mechanisms to be 1048 -- included in the representation output information. 1049 1050 List_Representation_Info_Extended : Boolean := False; 1051 -- GNAT 1052 -- Set true by -gnatRe switch. Causes extended information for record types 1053 -- to be included in the representation output information. 1054 1055 List_Preprocessing_Symbols : Boolean := False; 1056 -- GNAT, GNATPREP 1057 -- Set to True if symbols for preprocessing a source are to be listed 1058 -- before preprocessing occurs. Set to True by switch -s of gnatprep or 1059 -- -s in preprocessing data file for the compiler. 1060 1061 type Create_Repinfo_File_Proc is access procedure (Src : String); 1062 type Write_Repinfo_Line_Proc is access procedure (Info : String); 1063 type Close_Repinfo_File_Proc is access procedure; 1064 -- Types used for procedure addresses below 1065 1066 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null; 1067 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null; 1068 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null; 1069 -- GNAT 1070 -- These three locations are left null when operating in non-compiler (e.g. 1071 -- ASIS mode), but when operating in compiler mode, they are set to point 1072 -- to the three corresponding procedures in Osint-C. The reason for this 1073 -- slightly strange interface is to stop Repinfo from dragging in Osint in 1074 -- ASIS mode, which would include lots of unwanted units in the ASIS build. 1075 1076 type Create_List_File_Proc is access procedure (S : String); 1077 type Write_List_Info_Proc is access procedure (S : String); 1078 type Close_List_File_Proc is access procedure; 1079 -- Types used for procedure addresses below 1080 1081 Create_List_File_Access : Create_List_File_Proc := null; 1082 Write_List_Info_Access : Write_List_Info_Proc := null; 1083 Close_List_File_Access : Close_List_File_Proc := null; 1084 -- GNAT 1085 -- These three locations are left null when operating in non-compiler 1086 -- (e.g. from the binder), but when operating in compiler mode, they are 1087 -- set to point to the three corresponding procedures in Osint-C. The 1088 -- reason for this slightly strange interface is to prevent Repinfo 1089 -- from dragging in Osint-C in the binder, which would include unwanted 1090 -- units in the binder. 1091 1092 Locking_Policy : Character := ' '; 1093 -- GNAT, GNATBIND 1094 1095 -- Set to ' ' for the default case (no locking policy specified). Otherwise 1096 -- set based on the pragma Locking_Policy: 1097 -- Ceiling_Locking: 'C' 1098 -- Concurrent_Readers_Locking: 'R' 1099 -- Inheritance_Locking: 'I' 1100 1101 Locking_Policy_Sloc : Source_Ptr := No_Location; 1102 -- GNAT, GNATBIND 1103 -- Remember location of previous Locking_Policy pragma. This is used for 1104 -- inconsistency error messages. A value of System_Location is used if the 1105 -- policy is set in package System. 1106 1107 Look_In_Primary_Dir : Boolean := True; 1108 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN 1109 -- Set to False if a -I- was present on the command line. When True we are 1110 -- allowed to look in the primary directory to locate other source or 1111 -- library files. 1112 1113 Make_Steps : Boolean := False; 1114 -- GNATMAKE 1115 -- Set to True when either Compile_Only, Bind_Only or Link_Only is 1116 -- set to True. 1117 1118 Main_Index : Int := 0; 1119 -- GNATMAKE 1120 -- This is set to non-zero by gnatmake switch -eInnn to indicate that 1121 -- the main program is the nnn unit in a multi-unit source file. 1122 1123 Mapping_File_Name : String_Ptr := null; 1124 -- GNAT 1125 -- File name of mapping between unit names, file names and path names. 1126 -- (given by switch -gnatem) 1127 1128 Maximum_Messages : Int := 9999; 1129 -- GNAT, GNATBIND 1130 -- Maximum default number of errors before compilation is terminated, or in 1131 -- the case of GNAT, maximum number of warnings before further warnings are 1132 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch. 1133 1134 Maximum_File_Name_Length : Int; 1135 -- GNAT, GNATBIND 1136 -- Maximum number of characters allowed in a file name, not counting the 1137 -- extension, as set by the appropriate switch. If no switch is given, 1138 -- then this value is initialized by Osint to the appropriate value. 1139 1140 Maximum_Instantiations : Int := 8000; 1141 -- GNAT 1142 -- Maximum number of instantiations permitted (to stop runaway cases 1143 -- of nested instantiations). These situations probably only occur in 1144 -- specially concocted test cases. Can be modified by -gnateinn switch. 1145 1146 Maximum_Processes : Positive := 1; 1147 -- GNATMAKE, GPRBUILD 1148 -- Maximum number of processes that should be spawned to carry out 1149 -- compilations. 1150 1151 Minimal_Binder : Boolean := False; 1152 -- GNATBIND 1153 -- Set to True to suppress the generation of objects by the binder that 1154 -- are not strictly required for a program to run. Intended for ZFP 1155 -- applications that have tight memory constraints. 1156 1157 Minimal_Recompilation : Boolean := False; 1158 -- GNATMAKE 1159 -- Set to True if minimal recompilation mode requested 1160 1161 Minimize_Expression_With_Actions : Boolean := False; 1162 -- GNAT 1163 -- If True, minimize the use of N_Expression_With_Actions node. 1164 -- This can be used in particular on some back-ends where this node is 1165 -- difficult to support. 1166 1167 Modify_Tree_For_C : Boolean := False; 1168 -- GNAT 1169 -- If this switch is set True (currently it is set only by -gnatd.V), then 1170 -- certain meaning-preserving transformations are applied to the tree to 1171 -- make it easier to interface with back ends that implement C semantics. 1172 -- There is a section in Sinfo which describes the transformations made. 1173 1174 Multiple_Unit_Index : Int := 0; 1175 -- GNAT 1176 -- This is set non-zero if the current unit is being compiled in multiple 1177 -- unit per file mode, meaning that the current unit is selected from the 1178 -- sequence of units in the current source file, using the value stored 1179 -- in this variable (e.g. 2 = select second unit in file). A value of 1180 -- zero indicates that we are in normal (one unit per file) mode. 1181 1182 No_Backup : Boolean := False; 1183 -- GNATNAME 1184 -- Do not create backup copies of project files. Set by switch --no-backup. 1185 1186 No_Component_Reordering : Boolean := False; 1187 -- GNAT 1188 -- Set True if pragma No_Component_Reordering with no parameter encountered 1189 1190 No_Deletion : Boolean := False; 1191 -- GNATPREP 1192 -- Set by preprocessor switch -a. Do not eliminate any source text. Implies 1193 -- Undefined_Symbols_Are_False. Useful to perform a syntax check on all 1194 -- branches of #if constructs. 1195 1196 No_Elab_Code_All_Pragma : Node_Id := Empty; 1197 -- Set to point to a No_Elaboration_Code_All pragma or aspect encountered 1198 -- in the spec of the extended main unit. Used to determine if we need to 1199 -- do special tests for violation of this aspect. 1200 1201 No_Heap_Finalization_Pragma : Node_Id := Empty; 1202 -- GNAT 1203 -- Set to point to a No_Heap_Finalization pragma defined in a configuration 1204 -- file. 1205 1206 No_Main_Subprogram : Boolean := False; 1207 -- GNATMAKE, GNATBIND 1208 -- Set to True if compilation/binding of a program without main 1209 -- subprogram requested. 1210 1211 No_Run_Time_Mode : Boolean := False; 1212 -- GNAT, GNATBIND 1213 -- This flag is set True if a No_Run_Time pragma is encountered. See spec 1214 -- of Rtsfind for a full description of handling of this pragma. 1215 1216 No_Split_Units : Boolean := False; 1217 -- GPRBUILD 1218 -- Set to True with switch --no-split-units. When True, unit sources, spec, 1219 -- body and subunits, must all be in the same project. This is checked 1220 -- after each compilation. 1221 1222 No_Stdinc : Boolean := False; 1223 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF 1224 -- Set to True if no default source search dirs added to search list. 1225 1226 No_Stdlib : Boolean := False; 1227 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF 1228 -- Set to True if no default library search dirs added to search list. 1229 1230 No_Strict_Aliasing : Boolean := False; 1231 -- GNAT 1232 -- Set True if pragma No_Strict_Aliasing with no parameters encountered. 1233 1234 -- WARNING: There is a matching C declaration of this variable in fe.h 1235 1236 No_Tagged_Streams : Node_Id := Empty; 1237 -- GNAT 1238 -- If a pragma No_Tagged_Streams is active for the current scope, this 1239 -- points to the corresponding pragma. 1240 1241 Normalize_Scalars : Boolean := False; 1242 -- GNAT, GNATBIND 1243 -- Set True if a pragma Normalize_Scalars applies to the current unit. 1244 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 1245 1246 Object_Directory_Present : Boolean := False; 1247 -- GNATMAKE 1248 -- Set to True when an object directory is specified with option -D 1249 1250 Object_Path_File_Name : String_Ptr := null; 1251 -- GNAT2WHY 1252 -- Path of the temporary file that contains a list of object directories 1253 -- passed by -gnateO=<obj_path_file>. 1254 1255 One_Compilation_Per_Obj_Dir : Boolean := False; 1256 -- GNATMAKE, GPRBUILD 1257 -- Set to True with switch --single-compile-per-obj-dir. When True, there 1258 -- cannot be simultaneous compilations with the object files in the same 1259 -- object directory, if project files are used. 1260 1261 OpenAcc_Enabled : Boolean := False; 1262 -- GNAT 1263 -- Indicates whether OpenAcc pragmas should be taken into account. Set to 1264 -- True by the use of -fopenacc. 1265 1266 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code); 1267 pragma Ordered (Operating_Mode_Type); 1268 Operating_Mode : Operating_Mode_Type := Generate_Code; 1269 -- GNAT 1270 -- Indicates the operating mode of the compiler. The default is generate 1271 -- code, which runs the parser, semantics and backend. Switches can be 1272 -- used to set syntax checking only mode, or syntax and semantics checking 1273 -- only mode. Operating_Mode can also be modified as a result of detecting 1274 -- errors during the compilation process. In particular if any serious 1275 -- error is detected then this flag is reset from Generate_Code to 1276 -- Check_Semantics after generating an error message. This is an ordered 1277 -- type with the semantics that each value does more than the previous one. 1278 1279 Optimize_Alignment : Character := 'O'; 1280 -- GNAT 1281 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can 1282 -- be modified by use of pragma Optimize_Alignment. 1283 1284 Optimize_Alignment_Local : Boolean := False; 1285 -- GNAT 1286 -- Set True if Optimize_Alignment mode is set by a local configuration 1287 -- pragma that overrides the gnat.adc (or other configuration file) default 1288 -- so that the unit is not dependent on the default setting. Also always 1289 -- set True for internal units, since these always have a default setting 1290 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to 1291 -- them all having such an explicit pragma in each unit). 1292 1293 Original_Operating_Mode : Operating_Mode_Type := Generate_Code; 1294 -- GNAT 1295 -- Indicates the original operating mode of the compiler as set by compiler 1296 -- options. This is identical to Operating_Mode except that this is not 1297 -- affected by errors. 1298 1299 Optimization_Level : Int; 1300 pragma Import (C, Optimization_Level, "optimize"); 1301 -- GNAT 1302 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3) 1303 1304 Optimize_Size : Int; 1305 pragma Import (C, Optimize_Size, "optimize_size"); 1306 -- GNAT 1307 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero 1308 -- in -Os mode and set to zero otherwise. 1309 1310 Output_File_Name_Present : Boolean := False; 1311 -- GNATBIND, GNAT, GNATMAKE 1312 -- Set to True when the output C file name is given with option -o for 1313 -- GNATBIND, when the object file name is given with option -gnatO for GNAT 1314 -- or when the executable is given with option -o for GNATMAKE. 1315 1316 Output_Linker_Option_List : Boolean := False; 1317 -- GNATBIND 1318 -- True if output of list of linker options is requested (-K switch set) 1319 1320 Output_ALI_List : Boolean := False; 1321 ALI_List_Filename : String_Ptr; 1322 -- GNATBIND 1323 -- True if output of list of ALIs is requested (-A switch set). List is 1324 -- output under the given filename, or standard output if not specified. 1325 1326 Output_Object_List : Boolean := False; 1327 Object_List_Filename : String_Ptr; 1328 -- GNATBIND 1329 -- True if output of list of objects is requested (-O switch set). List is 1330 -- output under the given filename, or standard output if not specified. 1331 1332 Partition_Elaboration_Policy : Character := ' '; 1333 -- GNAT, GNATBIND 1334 -- Set to ' ' for the default case (no elaboration policy specified). Reset 1335 -- to first character (uppercase) of locking policy name if a valid pragma 1336 -- Partition_Elaboration_Policy is encountered. 1337 1338 Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location; 1339 -- GNAT, GNATBIND 1340 -- Remember location of previous Partition_Elaboration_Policy pragma. This 1341 -- is used for inconsistency error messages. A value of System_Location is 1342 -- used if the policy is set in package System. 1343 1344 Persistent_BSS_Mode : Boolean := False; 1345 -- GNAT 1346 -- True if a Persistent_BSS configuration pragma is in effect, causing 1347 -- potentially persistent data to be placed in the persistent_bss section. 1348 1349 Pessimistic_Elab_Order : Boolean := False; 1350 -- GNATBIND 1351 -- True if pessimistic elaboration order is to be chosen (-p switch set) 1352 1353 Polling_Required : Boolean := False; 1354 -- GNAT 1355 -- Set to True if polling for asynchronous abort is enabled by using 1356 -- the -gnatP option for GNAT. 1357 1358 Prefix_Exception_Messages : Boolean := False; 1359 -- GNAT 1360 -- Set True to prefix exception messages with entity-name: 1361 1362 Preprocessing_Data_File : String_Ptr := null; 1363 -- GNAT 1364 -- Set by switch -gnatep=. The file name of the preprocessing data file. 1365 1366 Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4); 1367 -- An extensible array to temporarily stores symbol definitions specified 1368 -- on the command line with -gnateD switches. The value 4 is an arbitrary 1369 -- starting point, if more space is needed it is allocated as required. 1370 1371 Preprocessing_Symbol_Last : Natural := 0; 1372 -- Index of last symbol definition in array Symbol_Definitions 1373 1374 Print_Generated_Code : Boolean := False; 1375 -- GNAT 1376 -- Set to True to enable output of generated code in source form. This 1377 -- flag is set by the -gnatG switch. 1378 1379 Print_Standard : Boolean := False; 1380 -- GNAT 1381 -- Set to true to enable printing of package standard in source form. 1382 -- This flag is set by the -gnatS switch 1383 1384 type Usage is (Unknown, Not_In_Use, In_Use); 1385 Project_File_In_Use : Usage := Unknown; 1386 -- GNAT 1387 -- Indicates if a project file is used or not. Set to In_Use by the first 1388 -- SFNP pragma. 1389 1390 Quantity_Of_Default_Size_Sec_Stacks : Int := -1; 1391 -- GNATBIND 1392 -- The number of default sized secondary stacks that the binder should 1393 -- generate. Allows ZFP users to have the binder generate extra stacks if 1394 -- needed to support multithreaded applications. A value of -1 indicates 1395 -- that no size was set by the binder. 1396 1397 Queuing_Policy : Character := ' '; 1398 -- GNAT, GNATBIND 1399 -- Set to ' ' for the default case (no queuing policy specified). Reset to 1400 -- first character (uppercase) of locking policy name if a valid 1401 -- Queuing_Policy pragma is encountered. 1402 1403 Queuing_Policy_Sloc : Source_Ptr := No_Location; 1404 -- GNAT, GNATBIND 1405 -- Remember location of previous Queuing_Policy pragma. This is used for 1406 -- inconsistency error messages. A value of System_Location is used if the 1407 -- policy is set in package System. 1408 1409 Quiet_Output : Boolean := False; 1410 -- GNATMAKE, GNATCLEAN, GPRBUILD, GPRCLEAN 1411 -- Set to True if the tool should not have any output if there are no 1412 -- errors or warnings. 1413 1414 Overriding_Renamings : Boolean := False; 1415 -- GNAT 1416 -- Set to True to enable compatibility mode with Rational compiler, and 1417 -- to accept renamings of implicit operations in their own scope. 1418 1419 Relaxed_Elaboration_Checks : Boolean := False; 1420 -- GNAT 1421 -- Set to True to ignore certain elaboration scenarios, thus making the 1422 -- current ABE mechanism more permissive. This behavior is applicable to 1423 -- both the default and the legacy ABE models. Modified by use of -gnatJ. 1424 1425 Relaxed_RM_Semantics : Boolean := False; 1426 -- GNAT 1427 -- Set to True to ignore some Ada semantic error to help parse legacy Ada 1428 -- code for use in e.g. static analysis (such as CodePeer). This deals 1429 -- with cases where other compilers allow illegal constructs. Tools such as 1430 -- CodePeer are interested in analyzing code rather than enforcing legality 1431 -- rules, so as long as these illegal constructs end up with code that can 1432 -- be handled by the tool in question, there is no reason to reject the 1433 -- code that is considered correct by the other compiler. 1434 1435 Replace_In_Comments : Boolean := False; 1436 -- GNATPREP 1437 -- Set to True if -C switch used. 1438 1439 RTS_Lib_Path_Name : String_Ptr := null; 1440 RTS_Src_Path_Name : String_Ptr := null; 1441 -- GNAT 1442 -- Set to the "adalib" and "adainclude" directories of the run time 1443 -- specified by --RTS=. 1444 1445 RTS_Switch : Boolean := False; 1446 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF 1447 -- Set to True when the --RTS switch is set 1448 1449 Run_Path_Option : Boolean := True; 1450 -- GNATMAKE, GNATLINK 1451 -- Set to False when no run_path_option should be issued to the linker 1452 1453 Search_Directory_Present : Boolean := False; 1454 -- GNAT 1455 -- Set to True when argument is -I. Reset to False when next argument, a 1456 -- search directory path is taken into account. Note that this is quite 1457 -- different from other switches in this section in that it is only set in 1458 -- a transitory manner as a result of scanning a -I switch with no file 1459 -- name, and if set, is an indication that the next argument is to be 1460 -- treated as a file name. 1461 1462 Sec_Stack_Used : Boolean := False; 1463 -- GNAT, GBATBIND 1464 -- Set True if generated code uses the System.Secondary_Stack package. For 1465 -- the binder, set if any unit uses the secondary stack package. 1466 1467 Setup_Projects : Boolean := False; 1468 -- GNAT DRIVER 1469 -- Set to True for GNAT SETUP: the Project Manager creates nonexistent 1470 -- object, library, and exec directories. 1471 1472 Shared_Libgnat : Boolean; 1473 -- GNATBIND 1474 -- Set to True if a shared libgnat is requested by using the -shared option 1475 -- for GNATBIND and to False when using the -static option. The value of 1476 -- this flag is set by Gnatbind.Scan_Bind_Arg. 1477 1478 Short_Circuit_And_Or : Boolean := False; 1479 -- GNAT 1480 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit. 1481 1482 type SPARK_Mode_Type is (None, Off, On); 1483 -- Possible legal modes that can be set by aspect/pragma SPARK_Mode, as 1484 -- well as the value None, which indicates no such pragma/aspect applies. 1485 1486 SPARK_Mode : SPARK_Mode_Type := None; 1487 -- GNAT 1488 -- Current SPARK mode setting. 1489 1490 SPARK_Mode_Pragma : Node_Id := Empty; 1491 -- GNAT 1492 -- If the current SPARK_Mode (above) was set by a pragma, this records 1493 -- the pragma that set this mode. 1494 1495 SPARK_Switches_File_Name : String_Ptr := null; 1496 -- GNAT 1497 -- Set to non-null file name by use of the -gnates switch to specify 1498 -- SPARK (gnat2why) specific switches in the given file name. 1499 1500 Special_Exception_Package_Used : Boolean := False; 1501 -- GNAT 1502 -- Set to True if either of the unit GNAT.Most_Recent_Exception or 1503 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of 1504 -- local raise statements into gotos in the presence of either package. 1505 1506 Sprint_Line_Limit : Nat := 72; 1507 -- GNAT 1508 -- Limit values for chopping long lines in Cprint/Sprint output, can be 1509 -- reset by use of NNN parameter with -gnatG or -gnatD switches. 1510 1511 Stack_Checking_Enabled : Boolean := False; 1512 -- GNAT 1513 -- Set to indicate if stack checking is enabled for the compilation. This 1514 -- is set directly from the value in the gcc back end in the body of the 1515 -- gcc version of back_end.adb. 1516 1517 Style_Check : Boolean := False; 1518 -- GNAT 1519 -- Set True to perform style checks. Activates checks carried out in 1520 -- package Style (see body of this package for details of checks). This 1521 -- flag is set True by use of either the -gnatg or -gnaty switches, or 1522 -- by the Style_Check pragma. 1523 1524 Style_Check_Main : Boolean := False; 1525 -- GNAT 1526 -- Set True if Style_Check was set for the main unit. This is used to 1527 -- enable style checks for units in the main extended source that get 1528 -- with'ed indirectly. It is set True by use of either the -gnatg or 1529 -- -gnaty switches, but not by use of the Style_Checks pragma. 1530 1531 Disable_FE_Inline : Boolean := False; 1532 Disable_FE_Inline_Always : Boolean := False; 1533 -- GNAT 1534 -- Request to disable front end inlining from pragma Inline or pragma 1535 -- Inline_Always out of the presence of the -fno-inline back end flag 1536 -- on the command line, regardless of any other switches that are set. 1537 -- It remains the back end's reponsibility to honor -fno-inline at the 1538 -- back end level. 1539 1540 Suppress_Control_Flow_Optimizations : Boolean := False; 1541 -- GNAT 1542 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations 1543 -- that interfere with coverage analysis based on the object code. 1544 1545 System_Extend_Pragma_Arg : Node_Id := Empty; 1546 -- GNAT 1547 -- Set non-empty if and only if a correct Extend_System pragma was present 1548 -- in which case it points to the argument of the pragma, and the name can 1549 -- be located as Chars (Expression (System_Extend_Pragma_Arg)). 1550 1551 System_Extend_Unit : Node_Id := Empty; 1552 -- GNAT 1553 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System 1554 -- is never appropriate in GNAT_Mode (and causes troubles, including 1555 -- bogus circularities, if we try to compile the run-time library with 1556 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit 1557 -- is a copy of the value set in System_Extend_Pragma_Arg. 1558 1559 Subunits_Missing : Boolean := False; 1560 -- GNAT 1561 -- This flag is set true if missing subunits are detected with code 1562 -- generation active. This causes code generation to be skipped. 1563 1564 Suppress_Checks : Boolean := False; 1565 -- GNAT 1566 -- Set to True if -gnatp (suppress all checks) switch present. 1567 1568 -- WARNING: There is a matching C declaration of this variable in fe.h 1569 1570 Suppress_Options : Suppress_Record; 1571 -- GNAT 1572 -- Indicates outer level setting of check suppression. This initializes 1573 -- the settings of the outer scope level in any unit compiled. This is 1574 -- initialized by Osint.Initialize, and further initialized by the 1575 -- Adjust_Global_Switches flag in Gnat1drv. 1576 1577 Table_Factor : Int := 1; 1578 -- GNAT 1579 -- Factor by which all initial table sizes set in Alloc are multiplied. 1580 -- Used in Table to calculate initial table sizes (the initial table size 1581 -- is the value in Alloc, used as the Table_Initial parameter value, 1582 -- multiplied by the factor given here. The default value is used if no 1583 -- -gnatT switch appears. 1584 1585 Tagged_Type_Expansion : Boolean := True; 1586 -- GNAT 1587 -- Set True if tagged types and interfaces should be expanded by the 1588 -- front-end. If False, the original tree is left unexpanded for tagged 1589 -- types and dispatching calls, assuming the underlying target supports it. 1590 1591 Target_Dependent_Info_Read_Name : String_Ptr := null; 1592 -- GNAT 1593 -- Set non-null to override the normal processing in Get_Targ and set the 1594 -- necessary information by reading the target dependent information file 1595 -- whose name is given here (see packages Get_Targ and Set_Targ for full 1596 -- details). Set to non-null file name by use of the -gnateT switch. 1597 1598 Target_Dependent_Info_Write_Name : String_Ptr := null; 1599 -- GNAT 1600 -- Set non-null to enable a call to Set_Targ.Write_Target_Dependent_Info 1601 -- which writes a target independent information file (see packages 1602 -- Get_Targ and Set_Targ for full details) using the name given by 1603 -- this switch. Set to non-null file name by use of the -gnatet switch. 1604 1605 type Origin_Of_Target is (Unknown, Default, Specified); 1606 1607 Target_Origin : Origin_Of_Target := Unknown; 1608 -- GPRBUILD 1609 -- Indicates the origin of attribute Target in project files 1610 1611 Target_Value : String_Access := null; 1612 -- GPRBUILD 1613 -- Indicates the value of attribute Target in project files 1614 1615 Task_Dispatching_Policy : Character := ' '; 1616 -- GNAT, GNATBIND 1617 -- Set to ' ' for the default case (no task dispatching policy specified). 1618 -- Reset to first character (uppercase) of task dispatching policy name 1619 -- if a valid Task_Dispatching_Policy pragma is encountered. 1620 1621 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location; 1622 -- GNAT, GNATBIND 1623 -- Remember location of previous Task_Dispatching_Policy pragma. This is 1624 -- used for inconsistency error messages. A value of System_Location is 1625 -- used if the policy is set in package System. 1626 1627 Tasking_Used : Boolean := False; 1628 -- Set True if any tasking construct is encountered. Used to activate the 1629 -- output of the Q, L and T lines in ALI files. 1630 1631 Time_Slice_Set : Boolean := False; 1632 -- GNATBIND 1633 -- Set True if a pragma Time_Slice is processed in the main unit, or 1634 -- if the -gnatTnn switch is present to set a time slice value. 1635 1636 Time_Slice_Value : Nat; 1637 -- GNATBIND 1638 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if 1639 -- Time_Slice pragma has been processed. Set to the time slice value in 1640 -- microseconds. Negative values are stored as zero, and the value is not 1641 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are 1642 -- reset to this maximum. This can also be set with the -gnatTnn switch. 1643 1644 Tolerate_Consistency_Errors : Boolean := False; 1645 -- GNATBIND 1646 -- Tolerate time stamp and other consistency errors. If this flag is set to 1647 -- True (-t), then inconsistencies result in warnings rather than errors. 1648 1649 Treat_Categorization_Errors_As_Warnings : Boolean := False; 1650 -- Normally categorization errors are true illegalities. If this switch 1651 -- is set, then such errors result in warning messages rather than error 1652 -- messages. Set True by -gnateP (P for Pure/Preelaborate). Also set in 1653 -- Relaxed_RM_Semantics mode since some old Ada 83 compilers treated 1654 -- pragma Preelaborate differently. 1655 1656 Treat_Restrictions_As_Warnings : Boolean := False; 1657 -- GNAT 1658 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by 1659 -- -gnatr switch. 1660 1661 Tree_Output : Boolean := False; 1662 -- GNAT 1663 -- Set to True (-gnatt) to generate output tree file 1664 1665 Try_Semantics : Boolean := False; 1666 -- GNAT 1667 -- Flag set to force attempt at semantic analysis, even if parser errors 1668 -- occur. This will probably cause blowups at this stage in the game. On 1669 -- the other hand, most such blowups will be caught cleanly and simply 1670 -- say compilation abandoned. This flag is set True by -gnatq or -gnatQ. 1671 1672 Unchecked_Shared_Lib_Imports : Boolean := False; 1673 -- GPRBUILD 1674 -- Set to True when shared library projects are allowed to import projects 1675 -- that are not shared library projects. Set on by use of the switch 1676 -- --unchecked-shared-lib-imports. 1677 1678 Undefined_Symbols_Are_False : Boolean := False; 1679 -- GNAT, GNATPREP 1680 -- Set to True by switch -u of gnatprep or -u in the preprocessing data 1681 -- file for the compiler. Indicates that while preprocessing sources, 1682 -- symbols that are not defined have the value FALSE. 1683 1684 Uneval_Old : Character := 'E'; 1685 -- GNAT 1686 -- Set to 'E'/'W'/'A' for use of Error/Warn/Allow in a valid pragma 1687 -- Unevaluated_Use_Of_Old. Default in the absence of the pragma is 'E' 1688 -- for the RM default behavior of giving an error. 1689 1690 Unique_Error_Tag : Boolean := Tag_Errors; 1691 -- GNAT 1692 -- Indicates if error messages are to be prefixed by the string error: 1693 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch. 1694 1695 Unnest_Subprogram_Mode : Boolean := False; 1696 -- If true, activates the circuitry for unnesting subprograms (see the spec 1697 -- of Exp_Unst for full details). Currently set only by use of -gnatd.1. 1698 1699 Unreserve_All_Interrupts : Boolean := False; 1700 -- GNAT, GNATBIND 1701 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma 1702 -- appears anywhere in the main unit for GNAT, or if any ALI file has the 1703 -- corresponding attribute set in GNATBIND. 1704 1705 Upper_Half_Encoding : Boolean := False; 1706 -- GNAT, GNATBIND 1707 -- Normally set False, indicating that upper half ISO 8859-1 characters are 1708 -- used in the normal way to represent themselves. If the wide character 1709 -- encoding method uses the upper bit for this encoding, then this flag is 1710 -- set True, and upper half characters in the source indicate the start of 1711 -- a wide character sequence. Set by -gnatW or -W switches. 1712 1713 Use_Include_Path_File : Boolean := False; 1714 -- GNATMAKE, GPRBUILD 1715 -- When True, create a source search path file, even when a mapping file 1716 -- is used. 1717 1718 Usage_Requested : Boolean := False; 1719 -- GNAT, GNATBIND, GNATMAKE 1720 -- Set to True if -h (-gnath for the compiler) switch encountered 1721 -- requesting usage information 1722 1723 Use_Pragma_Linker_Constructor : Boolean := False; 1724 -- GNATBIND 1725 -- True if pragma Linker_Constructor applies to adainit 1726 1727 Use_VADS_Size : Boolean := False; 1728 -- GNAT 1729 -- Set to True if a valid pragma Use_VADS_Size is processed 1730 1731 Validity_Checks_On : Boolean := True; 1732 -- GNAT 1733 -- This flag determines if validity checking is on or off. The initial 1734 -- state is on, and the required default validity checks are active. The 1735 -- actual set of checks that is performed if Validity_Checks_On is set is 1736 -- defined by the switches in package Validsw. The Validity_Checks_On flag 1737 -- is controlled by pragma Validity_Checks (On | Off), and also some 1738 -- generated compiler code (typically code that has to do with validity 1739 -- check generation) is compiled with this flag set to False. This flag is 1740 -- set to False by the -gnatp switch. 1741 1742 Verbose_Mode : Boolean := False; 1743 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN, 1744 -- GPRBUILD, GPRCLEAN 1745 -- Set to True to get verbose mode (full error message text and location 1746 -- information sent to standard output, also header, copyright and summary) 1747 1748 type Verbosity_Level_Type is (None, Low, Medium, High); 1749 pragma Ordered (Verbosity_Level_Type); 1750 Verbosity_Level : Verbosity_Level_Type := High; 1751 -- GNATMAKE 1752 -- Modified by gnatmake switches -v, -vl, -vm, -vh. Indicates 1753 -- the level of verbosity of informational messages: 1754 -- 1755 -- In Low Verbosity, the reasons why a source is recompiled, the name 1756 -- of the executable and the reason it must be rebuilt is output. 1757 -- 1758 -- In Medium Verbosity, additional lines are output for each ALI file 1759 -- that is checked. 1760 -- 1761 -- In High Verbosity, additional lines are output when the ALI file 1762 -- is part of an Ada library, is read-only or is part of the runtime. 1763 1764 Warn_On_Ada_2005_Compatibility : Boolean := True; 1765 -- GNAT 1766 -- Set to True to generate all warnings on Ada 2005 compatibility issues, 1767 -- including warnings on Ada 2005 obsolescent features used in Ada 2005 1768 -- mode. Set by default, modified by use of -gnatwy/Y. 1769 1770 Warn_On_Ada_2012_Compatibility : Boolean := True; 1771 -- GNAT 1772 -- Set to True to generate all warnings on Ada 2012 compatibility issues, 1773 -- including warnings on Ada 2012 obsolescent features used in Ada 2012 1774 -- mode. Modified by use of -gnatwy/Y. 1775 1776 Warn_On_Ada_202X_Compatibility : Boolean := True; 1777 -- GNAT 1778 -- Set to True to generate all warnings on Ada 202X compatibility issues, 1779 -- including warnings on Ada 202X obsolescent features used in Ada 202X 1780 -- mode. ???There is no warning switch for this yet. 1781 1782 Warn_On_All_Unread_Out_Parameters : Boolean := False; 1783 -- GNAT 1784 -- Set to True to generate warnings in all cases where a variable is 1785 -- modified by being passed as to an OUT formal, but the resulting value is 1786 -- never read. The default is that this warning is suppressed. Modified 1787 -- by use of gnatw.o/.O. 1788 1789 Warn_On_Assertion_Failure : Boolean := True; 1790 -- GNAT 1791 -- Set to True to activate warnings on assertions that can be determined 1792 -- at compile time will always fail. Modified by use of -gnatw.a/.A. 1793 1794 Warn_On_Assumed_Low_Bound : Boolean := True; 1795 -- GNAT 1796 -- Set to True to activate warnings for string parameters that are indexed 1797 -- with literals or S'Length, presumably assuming a lower bound of one. 1798 -- Modified by use of -gnatww/W. 1799 1800 Warn_On_Atomic_Synchronization : Boolean := False; 1801 -- GNAT 1802 -- Set to True to generate information messages for atomic synchronization. 1803 -- Modified by use of -gnatw.n/.N. 1804 1805 Warn_On_Bad_Fixed_Value : Boolean := False; 1806 -- GNAT 1807 -- Set to True to generate warnings for static fixed-point expression 1808 -- values that are not an exact multiple of the small value of the type. 1809 -- Odd by default, modified by use of -gnatwb/B. 1810 1811 Warn_On_Biased_Representation : Boolean := True; 1812 -- GNAT 1813 -- Set to True to generate warnings for size clauses, component clauses 1814 -- and component_size clauses that force biased representation. Modified 1815 -- by use of -gnatw.b/.B. 1816 1817 Warn_On_Constant : Boolean := False; 1818 -- GNAT 1819 -- Set to True to generate warnings for variables that could be declared 1820 -- as constants. Modified by use of -gnatwk/K. 1821 1822 Warn_On_Deleted_Code : Boolean := False; 1823 -- GNAT 1824 -- Set to True to generate warnings for code deleted by the front end 1825 -- for conditional statements whose outcome is known at compile time. 1826 -- Modified by use of -gnatwt/T. 1827 1828 Warn_On_Dereference : Boolean := False; 1829 -- GNAT 1830 -- Set to True to generate warnings for implicit dereferences for array 1831 -- indexing and record component access. Modified by use of -gnatwd/D. 1832 1833 Warn_On_Export_Import : Boolean := True; 1834 -- GNAT 1835 -- Set to True to generate warnings for suspicious use of export or 1836 -- import pragmas. Modified by use of -gnatwx/X. 1837 1838 Warn_On_Elab_Access : Boolean := False; 1839 -- GNAT 1840 -- Set to True to generate warnings for P'Access in the case where 1841 -- subprogram P is in the same package as the P'Access, and the P'Access is 1842 -- evaluated at package elaboration time, and occurs before the body of P 1843 -- has been elaborated. 1844 1845 Warn_On_Hiding : Boolean := False; 1846 -- GNAT 1847 -- Set to True to generate warnings if a declared entity hides another 1848 -- entity. The default is that this warning is suppressed. Modified by 1849 -- use of -gnatwh/H. 1850 1851 Warn_On_Modified_Unread : Boolean := False; 1852 -- GNAT 1853 -- Set to True to generate warnings if a variable is assigned but is never 1854 -- read. Also controls warnings for similar cases involving out parameters, 1855 -- but only if there is only one out parameter for the procedure involved. 1856 -- The default is that this warning is suppressed, modified by use of 1857 -- -gnatwm/M. 1858 1859 Warn_On_No_Value_Assigned : Boolean := True; 1860 -- GNAT 1861 -- Set to True to generate warnings if no value is ever assigned to a 1862 -- variable that is at least partially uninitialized. Set to false to 1863 -- suppress such warnings. The default is that such warnings are enabled. 1864 -- Modified by use of -gnatwv/V. 1865 1866 Warn_On_Non_Local_Exception : Boolean := False; 1867 -- GNAT 1868 -- Set to True to generate warnings for non-local exception raises and also 1869 -- handlers that can never handle a local raise. This warning is only ever 1870 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The 1871 -- default is not to generate the warnings except that if the source has 1872 -- at least one exception handler, and this restriction is set, and the 1873 -- warning was not explicitly turned off, then it is turned on by default. 1874 -- Modified by use of -gnatw.x/.X. 1875 1876 No_Warn_On_Non_Local_Exception : Boolean := False; 1877 -- GNAT 1878 -- This is set to True if the above warning is explicitly suppressed. We 1879 -- use this to avoid turning it on by default when No_Exception_Propagation 1880 -- restriction is set and an exception handler is present. 1881 1882 Warn_On_Object_Renames_Function : Boolean := False; 1883 -- GNAT 1884 -- Set to True to generate warnings when a function result is renamed as 1885 -- an object. The default is that this warning is disabled. Modified by 1886 -- use of -gnatw.r/.R. 1887 1888 Warn_On_Obsolescent_Feature : Boolean := False; 1889 -- GNAT 1890 -- Set to True to generate warnings on use of any feature in Annex or if a 1891 -- subprogram is called for which a pragma Obsolescent applies. Modified 1892 -- by use of -gnatwj/J. 1893 1894 Warn_On_Overlap : Boolean := False; 1895 -- GNAT 1896 -- Set to True to generate warnings when a writable actual overlaps with 1897 -- another actual in a subprogram call. This applies only in modes before 1898 -- Ada 2012. Starting with Ada 2012, such overlaps are illegal. 1899 -- Modified by use of -gnatw.i/.I. 1900 1901 Warn_On_Questionable_Missing_Parens : Boolean := True; 1902 -- GNAT 1903 -- Set to True to generate warnings for cases where parentheses are missing 1904 -- and the usage is questionable, because the intent is unclear. On by 1905 -- default, modified by use of -gnatwq/Q. 1906 1907 Warn_On_Parameter_Order : Boolean := False; 1908 -- GNAT 1909 -- Set to True to generate warnings for cases where the argument list for 1910 -- a call is a sequence of identifiers that match the formal identifiers, 1911 -- but are in the wrong order. 1912 1913 Warn_On_Redundant_Constructs : Boolean := False; 1914 -- GNAT 1915 -- Set to True to generate warnings for redundant constructs (e.g. useless 1916 -- assignments/conversions). The default is that this warning is disabled. 1917 -- Modified by use of -gnatwr/R. 1918 1919 Warn_On_Reverse_Bit_Order : Boolean := True; 1920 -- GNAT 1921 -- Set to True to generate warning (informational) messages for component 1922 -- clauses that are affected by non-standard bit-order. The default is 1923 -- that this warning is enabled. Modified by -gnatw.v/.V. 1924 1925 Warn_On_Suspicious_Contract : Boolean := True; 1926 -- GNAT 1927 -- Set to True to generate warnings for suspicious contracts expressed as 1928 -- pragmas or aspects precondition and postcondition, as well as other 1929 -- suspicious cases of expressions typically found in contracts like 1930 -- quantified expressions and uses of Update attribute. The default is that 1931 -- this warning is enabled. Modified by use of -gnatw.t/.T. 1932 1933 Warn_On_Suspicious_Modulus_Value : Boolean := True; 1934 -- GNAT 1935 -- Set to True to generate warnings for suspicious modulus values. The 1936 -- default is that this warning is enabled. Modified by -gnatw.m/.M. 1937 1938 Warn_On_Unchecked_Conversion : Boolean := True; 1939 -- GNAT 1940 -- Set to True to generate warnings for unchecked conversions that may have 1941 -- non-portable semantics (e.g. because sizes of types differ). Modified 1942 -- by use of -gnatwz/Z. 1943 1944 Warn_On_Unordered_Enumeration_Type : Boolean := False; 1945 -- GNAT 1946 -- Set to True to generate warnings for inappropriate uses (comparisons 1947 -- and explicit ranges) on unordered enumeration types (which includes 1948 -- all enumeration types for which pragma Ordered is not given). The 1949 -- default is that this warning is disabled. Modified by -gnat.u/.U. 1950 1951 Warn_On_Unrecognized_Pragma : Boolean := True; 1952 -- GNAT 1953 -- Set to True to generate warnings for unrecognized pragmas. The default 1954 -- is that this warning is enabled. Modified by use of -gnatwg/G. 1955 1956 Warn_On_Unrepped_Components : Boolean := False; 1957 -- GNAT 1958 -- Set to True to generate warnings for the case of components of record 1959 -- which have a record representation clause but this component does not 1960 -- have a component clause. Modified by use of -gnatw.c/.C. 1961 1962 Warn_On_Warnings_Off : Boolean := False; 1963 -- GNAT 1964 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent), 1965 -- where either the pragma is never used, or it could be replaced by a 1966 -- pragma Unmodified or Unreferenced. Also generates warnings for pragma 1967 -- Warning (Off, string) which either has no matching pragma Warning On, 1968 -- or where no warning has been suppressed by the use of the pragma. 1969 -- Modified by use of -gnatw.w/.W. 1970 1971 type Warning_Mode_Type is 1972 (Suppress, Normal, Treat_As_Error, Treat_Run_Time_Warnings_As_Errors); 1973 Warning_Mode : Warning_Mode_Type := Normal; 1974 -- GNAT, GNATBIND 1975 -- Controls treatment of warning messages. If set to Suppress, warning 1976 -- messages are not generated at all. In Normal mode, they are generated 1977 -- but do not count as errors. In Treat_As_Error mode, warning messages are 1978 -- generated and treated as errors. In Treat_Run_Time_Warnings_As_Errors, 1979 -- warning messages regarding errors raised at run time are treated as 1980 -- errors. Note that Warning_Mode = Suppress causes pragma Warnings to be 1981 -- ignored (except for legality checks), unless we are in GNATprove_Mode, 1982 -- which requires pragma Warnings to be stored for the formal verification 1983 -- backend. 1984 1985 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets; 1986 -- GNAT, GNATBIND 1987 -- Method used for encoding wide characters in the source program. See 1988 -- description of type in unit System.WCh_Con for a list of the methods 1989 -- that are currently supported. Note that brackets notation is always 1990 -- recognized in source programs regardless of the setting of this 1991 -- variable. The default setting causes only the brackets notation to be 1992 -- recognized. If this is the main unit, this setting also controls the 1993 -- output of the W=? parameter in the ALI file, which is used to provide 1994 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder, 1995 -- the value set here overrides this main unit default. 1996 1997 Wide_Character_Encoding_Method_Specified : Boolean := False; 1998 -- GNAT, GNATBIND 1999 -- Set True if the value in Wide_Character_Encoding_Method was set as 2000 -- a result of an explicit -gnatW? or -W? switch. False otherwise. 2001 2002 Xref_Active : Boolean := True; 2003 -- GNAT 2004 -- Set if cross-referencing is enabled (i.e. xref info in ALI files) 2005 2006 Zero_Formatting : Boolean := False; 2007 -- GNATBIND 2008 -- Do no formatting (no title, no leading spaces, no empty lines) in 2009 -- auxiliary outputs (-e, -K, -l, -R). 2010 2011 ---------------------------- 2012 -- Configuration Settings -- 2013 ---------------------------- 2014 2015 -- These are settings that are used to establish the mode at the start of 2016 -- each unit. The values defined below can be affected either by command 2017 -- line switches, or by the use of appropriate configuration pragmas in a 2018 -- configuration pragma file (but NOT by a local use of a configuration 2019 -- pragma in a single file). 2020 2021 Ada_Version_Config : Ada_Version_Type; 2022 -- GNAT 2023 -- This is the value of the configuration switch for the Ada 83 mode, as 2024 -- set by the command line switches -gnat83/95/2005/2012, and possibly 2025 -- modified by the use of configuration pragmas Ada_*. This switch is used 2026 -- to set the initial value for Ada_Version mode at the start of analysis 2027 -- of a unit. Note however that the setting of this flag is ignored for 2028 -- internal and predefined units (which are always compiled in the most up 2029 -- to date version of Ada). 2030 2031 Ada_Version_Pragma_Config : Node_Id; 2032 -- This will be set nonempty if it is set by a configuration pragma 2033 2034 Ada_Version_Explicit_Config : Ada_Version_Type; 2035 -- GNAT 2036 -- This is set in the same manner as Ada_Version_Config. The difference is 2037 -- that the setting of this flag is not ignored for internal and predefined 2038 -- units, which for some purposes do indeed access this value, regardless 2039 -- of the fact that they are compiled the most up to date ada version). 2040 2041 Assertions_Enabled_Config : Boolean; 2042 -- GNAT 2043 -- This is the value of the configuration switch for assertions enabled 2044 -- mode, as possibly set by the command line switch -gnata, and possibly 2045 -- modified by the use of the configuration pragma Assertion_Policy. 2046 2047 Assume_No_Invalid_Values_Config : Boolean; 2048 -- GNAT 2049 -- This is the value of the configuration switch for assuming "no invalid 2050 -- values enabled" mode, as possibly set by the command line switch 2051 -- -gnatB, and possibly modified by the use of the configuration pragma 2052 -- Assume_No_Invalid_Values. 2053 2054 Check_Float_Overflow_Config : Boolean; 2055 -- GNAT 2056 -- Set to True to check that operations on predefined unconstrained float 2057 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 2058 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 2059 -- of the -gnateF switch. 2060 2061 Check_Policy_List_Config : Node_Id; 2062 -- GNAT 2063 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 2064 -- that are linked through the Next_Pragma fields, with the list being 2065 -- terminated by Empty. The order is most recently processed first. This 2066 -- list includes only those pragmas in configuration pragma files. 2067 2068 Default_Pool_Config : Node_Id := Empty; 2069 -- GNAT 2070 -- Same as Default_Pool above, except this is only for Default_Storage_Pool 2071 -- pragmas that are configuration pragmas. 2072 2073 Default_SSO_Config : Character := ' '; 2074 -- GNAT 2075 -- Set if a pragma Default_Scalar_Storage_Order appears as a configuration 2076 -- pragma. A value of ' ' means that no pragma was given, otherwise the 2077 -- value is 'H' for High_Order_First or 'L' for Low_Order_First. 2078 2079 Dynamic_Elaboration_Checks_Config : Boolean := False; 2080 -- GNAT 2081 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 2082 -- switch or by the use of pragma Elaboration_Checking (Dynamic). 2083 2084 Exception_Locations_Suppressed_Config : Boolean := False; 2085 -- GNAT 2086 -- Set True by use of the configuration pragma Suppress_Exception_Messages 2087 2088 Extensions_Allowed_Config : Boolean; 2089 -- GNAT 2090 -- This is the flag that indicates whether extensions are allowed. It can 2091 -- be set True either by use of the -gnatX switch, or by use of the 2092 -- configuration pragma Extensions_Allowed (On). It is always set to True 2093 -- for internal GNAT units, since extensions are always permitted in such 2094 -- units. 2095 2096 External_Name_Exp_Casing_Config : External_Casing_Type; 2097 -- GNAT 2098 -- This is the value of the configuration switch that controls casing of 2099 -- external symbols for which an explicit external name is given. It can be 2100 -- set to Uppercase by the command line switch -gnatF, and further modified 2101 -- by the use of the configuration pragma External_Name_Casing in the 2102 -- gnat.adc file. This flag is used to set the initial value for 2103 -- External_Name_Exp_Casing at the start of analyzing each unit. Note 2104 -- however that the setting of this flag is ignored for internal and 2105 -- predefined units (which are always compiled with As_Is mode). 2106 2107 External_Name_Imp_Casing_Config : External_Casing_Type; 2108 -- GNAT 2109 -- This is the value of the configuration switch that controls casing of 2110 -- external symbols where the external name is implicitly given. It can be 2111 -- set to Uppercase by the command line switch -gnatF, and further modified 2112 -- by the use of the configuration pragma External_Name_Casing in the 2113 -- gnat.adc file. This flag is used to set the initial value for 2114 -- External_Name_Imp_Casing at the start of analyzing each unit. Note 2115 -- however that the setting of this flag is ignored for internal and 2116 -- predefined units (which are always compiled with Lowercase mode). 2117 2118 Fast_Math_Config : Boolean; 2119 -- GNAT 2120 -- This is the value of the configuration switch that controls Fast_Math 2121 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is 2122 -- used to set the initial value of Fast_Math at the start of each new 2123 -- compilation unit. 2124 2125 Initialize_Scalars_Config : Boolean; 2126 -- GNAT 2127 -- This is the value of the configuration switch that is set by the 2128 -- pragma Initialize_Scalars when it appears in the gnat.adc file. 2129 -- This switch is not set when the pragma appears ahead of a given 2130 -- unit, so it does not affect the compilation of other units. 2131 2132 No_Component_Reordering_Config : Boolean; 2133 -- GNAT 2134 -- This is the value of the configuration switch that is set by the 2135 -- pragma No_Component_Reordering when it appears in the gnat.adc file. 2136 -- This flag is used to set the initial value of No_Component_Reordering 2137 -- at the start of each compilation unit, except that it is always set 2138 -- False for predefined units. 2139 2140 No_Exit_Message : Boolean := False; 2141 -- GNATMAKE, GPRBUILD 2142 -- Set with switch --no-exit-message. When True, if there are compilation 2143 -- failures, the builder does not issue an exit error message. 2144 2145 Optimize_Alignment_Config : Character; 2146 -- GNAT 2147 -- This is the value of the configuration switch that controls the 2148 -- alignment optimization mode, as set by an Optimize_Alignment pragma. 2149 -- It is used to set the initial value of Optimize_Alignment at the start 2150 -- of each new compilation unit, except that it is always set to 'O' (off) 2151 -- for internal units. 2152 2153 Persistent_BSS_Mode_Config : Boolean; 2154 -- GNAT 2155 -- This is the value of the configuration switch that controls whether 2156 -- potentially persistent data is to be placed in the persistent_bss 2157 -- section. It can be set True by use of the pragma Persistent_BSS. 2158 -- This flag is used to set the initial value of Persistent_BSS_Mode 2159 -- at the start of each compilation unit, except that it is always 2160 -- set False for predefined units. 2161 2162 Polling_Required_Config : Boolean; 2163 -- GNAT 2164 -- This is the value of the configuration switch that controls polling 2165 -- mode. It can be set True by the command line switch -gnatP, and then 2166 -- further modified by the use of pragma Polling in the gnat.adc file. This 2167 -- flag is used to set the initial value for Polling_Required at the start 2168 -- of analyzing each unit. 2169 2170 Prefix_Exception_Messages_Config : Boolean; 2171 -- The setting of Prefix_Exception_Messages from configuration pragmas 2172 2173 SPARK_Mode_Config : SPARK_Mode_Type := None; 2174 -- GNAT 2175 -- The setting of SPARK_Mode from configuration pragmas 2176 2177 SPARK_Mode_Pragma_Config : Node_Id := Empty; 2178 -- If a SPARK_Mode pragma appeared in the configuration pragmas (setting 2179 -- SPARK_Mode_Config appropriately), then this points to the N_Pragma node. 2180 2181 Uneval_Old_Config : Character; 2182 -- GNAT 2183 -- The setting of Uneval_Old from configuration pragmas 2184 2185 Use_VADS_Size_Config : Boolean; 2186 -- GNAT 2187 -- This is the value of the configuration switch that controls the use of 2188 -- VADS_Size instead of Size wherever the attribute Size is used. It can 2189 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file. 2190 -- This flag is used to set the initial value for Use_VADS_Size at the 2191 -- start of analyzing each unit. Note however that the setting of this flag 2192 -- is ignored for internal and predefined units (which are always compiled 2193 -- with the standard Size semantics). 2194 2195 type Config_Switches_Type is private; 2196 -- Type used to save values of the switches set from Config values 2197 2198 procedure Register_Config_Switches; 2199 -- This procedure is called after processing the gnat.adc file and other 2200 -- configuration pragma files to record the values of the Config switches, 2201 -- as possibly modified by the use of command line switches and pragmas 2202 -- appearing in these files. 2203 2204 procedure Restore_Config_Switches (Save : Config_Switches_Type); 2205 -- This procedure restores a set of switch values previously saved by a 2206 -- call to Save_Config_Switches. 2207 2208 function Save_Config_Switches return Config_Switches_Type; 2209 -- Return the current state of all configuration-related attributes 2210 2211 procedure Set_Config_Switches 2212 (Internal_Unit : Boolean; 2213 Main_Unit : Boolean); 2214 -- This procedure sets the switches to the appropriate initial values. The 2215 -- parameter Internal_Unit is True for an internal or predefined unit, and 2216 -- affects the way the switches are set (see above). Main_Unit is true if 2217 -- switches are being set for the main unit or for the spec of the main 2218 -- unit. This affects setting of the assert/debug pragma switches, which 2219 -- are normally set false by default for an internal unit, except when the 2220 -- internal unit is the main unit, in which case we use the command line 2221 -- settings. 2222 2223 ------------------------ 2224 -- Other Global Flags -- 2225 ------------------------ 2226 2227 Building_Static_Dispatch_Tables : Boolean := True; 2228 -- This flag indicates if the backend supports generation of statically 2229 -- allocated dispatch tables. If it is True, then the front end will 2230 -- generate static aggregates for dispatch tables that contain forward 2231 -- references to addresses of subprograms not seen yet, and the back end 2232 -- must be prepared to handle this case. If it is False, then the front 2233 -- end generates assignments to initialize the dispatch table, and there 2234 -- are no such forward references. By default we build statically allocated 2235 -- dispatch tables for all library level tagged types in all platforms.This 2236 -- behavior can be disabled using switch -gnatd.t which will set this flag 2237 -- to False and revert to the previous dynamic behavior. 2238 2239 Expander_Active : Boolean := False; 2240 -- A flag that indicates if expansion is active (True) or deactivated 2241 -- (False). When expansion is deactivated all calls to expander routines 2242 -- have no effect. Note that the initial setting of False is merely to 2243 -- prevent saving of an undefined value for an initial call to the 2244 -- Expander_Mode_Save_And_Set procedure. For more information on the use of 2245 -- this flag, see package Expander. Indeed this flag might more logically 2246 -- be in the spec of Expander, but it is referenced by Errout, and it 2247 -- really seems wrong for Errout to depend on Expander. 2248 2249 ----------------------- 2250 -- Tree I/O Routines -- 2251 ----------------------- 2252 2253 procedure Tree_Read; 2254 -- Reads switch settings from current tree file using Tree_Read 2255 2256 procedure Tree_Write; 2257 -- Writes out switch settings to current tree file using Tree_Write 2258 2259 -------------------------- 2260 -- ASIS Version Control -- 2261 -------------------------- 2262 2263 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number) 2264 -- are supposed to be used in the GNAT/ASIS version check performed in 2265 -- the ASIS code (this package is also a part of the ASIS implementation). 2266 -- They are set by Tree_Read procedure, so they represent the version 2267 -- number (and the version string) of the compiler which has created the 2268 -- tree, and they are supposed to be compared with the corresponding values 2269 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS 2270 -- implementation. 2271 2272 Tree_Version_String : String_Access; 2273 -- Used to store the compiler version string read from a tree file to check 2274 -- if it is from the same date as stored in the version string in Gnatvsn. 2275 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow 2276 -- non-Pro ASIS and ASIS-based tools to be used with any version of the 2277 -- GNAT compiler. Therefore, we need the possibility to compare the dates 2278 -- of the corresponding source sets, using version strings that may be 2279 -- of different lengths. 2280 2281 Tree_ASIS_Version_Number : Int; 2282 -- Used to store the ASIS version number read from a tree file to check if 2283 -- it is the same as stored in the ASIS version number in Tree_IO. 2284 2285 ----------------------------------- 2286 -- Modes for Formal Verification -- 2287 ----------------------------------- 2288 2289 GNATprove_Mode : Boolean := False; 2290 -- Specific compiling mode targeting formal verification for those parts 2291 -- of the input code that belong to the SPARK 2014 subset of Ada. Set True 2292 -- by the gnat2why executable or by use of the -gnatd.F debug switch. Note 2293 -- that this is completely separate from the SPARK restriction defined in 2294 -- GNAT to detect violations of a subset of SPARK 2005 rules. 2295 2296 --------------------------- 2297 -- Error/Warning Control -- 2298 --------------------------- 2299 2300 -- The following array would more reasonably be located in Err_Vars or 2301 -- Errout, but we put them here to deal with licensing issues (we need 2302 -- this to have the GPL exception licensing, since these variables and 2303 -- subprograms are accessed from units with this licensing). 2304 2305 Warnings_As_Errors : array (1 .. 10_000) of String_Ptr; 2306 -- Table for recording Warning_As_Error pragmas as they are processed. It 2307 -- would be nicer to use Table, but there are circular elaboration problems 2308 -- if we try to do this, and an attempt to find some other appropriately 2309 -- licensed unit to declare this as a Table failed with various elaboration 2310 -- circularities. 2311 2312 Warnings_As_Errors_Count : Natural; 2313 -- GNAT 2314 -- Number of entries stored in Warnings_As_Errors table 2315 2316 Warnings_As_Errors_Count_Config : Natural; 2317 -- GNAT 2318 -- Count of pattern strings stored from Warning_As_Error pragmas 2319 2320 --------------- 2321 -- GNAT_Mode -- 2322 --------------- 2323 2324 GNAT_Mode : Boolean := False; 2325 -- GNAT 2326 -- True if compiling in GNAT system mode (-gnatg switch) 2327 2328 -- WARNING: There is a matching C declaration of this variable in fe.h 2329 2330 GNAT_Mode_Config : Boolean := False; 2331 -- GNAT 2332 -- True if -gnatg switch is present. GNAT_Mode may be temporary set to 2333 -- True during the analysis of a system unit, but GNAT_Mode_Config must 2334 -- not change once scanned and set. 2335 2336 -- Setting GNAT mode has the following effects on the language that is 2337 -- accepted. Note that several of the following have the effect of changing 2338 -- an error to a warning. But warnings are usually treated as fatal errors 2339 -- in -gnatg mode, so to actually take advantage of such a change, it is 2340 -- necessary to add an explicit pragma Warnings (Off) in the source and 2341 -- this requires clear documentation of why this is necessary. 2342 2343 -- The identifier character set is set to 'n' (7-bit ASCII) 2344 2345 -- Pragma Extend_System is ignored 2346 2347 -- Warning_Mode is set to Treat_As_Error (-gnatwe) 2348 2349 -- Standard style checks are set (See Set_GNAT_Style_Check_Options) 2350 2351 -- Standard warnings are turned on (see Set_GNAT_Mode_Warnings) 2352 2353 -- The Ada version is set to Ada 2012 2354 2355 -- Task priorities are always allowed to be in the range Any_Priority 2356 2357 -- Overflow checks are suppressed, overflow checking set to strict mode 2358 2359 -- ALI files are always generated for predefined generic packages 2360 2361 -- Obsolescent feature warnings are suppressed 2362 2363 -- Recompilation of children of GNAT, System, Ada, Interfaces is allowed 2364 2365 -- The Scalar_Storage_Order attribute applies to generic types 2366 2367 -- Categorization errors are treated as warnings rather than errors 2368 2369 -- Statements in preelaborated units give warnings rather than errors 2370 2371 -- Private objects are allowed in preelaborated units 2372 2373 -- Non-static constants in preelaborated units give warnings not errors 2374 2375 -- The warning about component size being ignored is suppressed 2376 2377 -- The warning about size clauses being ignored is suppressed 2378 2379 -- Initializing limited types gives a warning rather than an error 2380 2381 -- Copying of limited objects is allowed 2382 2383 -- Returning objects of limited types is allowed 2384 2385 -- Non-static call in preelaborated unit give a warning, not an error 2386 2387 -- Warnings on possible elaboration errors are suppressed 2388 2389 -- Warnings about packing being ignored are suppressed 2390 2391 -- Warnings in internal units are not suppressed (they normally are) 2392 2393 -- The only special comment sequence allowed is --! 2394 2395 -------------------------- 2396 -- Private Declarations -- 2397 -------------------------- 2398 2399private 2400 -- The following type is used to save and restore settings of switches in 2401 -- Opt that represent the configuration (i.e. result of config pragmas). 2402 2403 -- Note that Ada_Version_Explicit is not included, since this is a sticky 2404 -- flag that once set does not get reset, since the whole idea of this flag 2405 -- is to record the setting for the main unit. 2406 2407 type Config_Switches_Type is record 2408 Ada_Version : Ada_Version_Type; 2409 Ada_Version_Explicit : Ada_Version_Type; 2410 Ada_Version_Pragma : Node_Id; 2411 Assertions_Enabled : Boolean; 2412 Assume_No_Invalid_Values : Boolean; 2413 Check_Float_Overflow : Boolean; 2414 Check_Policy_List : Node_Id; 2415 Default_Pool : Node_Id; 2416 Default_SSO : Character; 2417 Dynamic_Elaboration_Checks : Boolean; 2418 Exception_Locations_Suppressed : Boolean; 2419 Extensions_Allowed : Boolean; 2420 External_Name_Exp_Casing : External_Casing_Type; 2421 External_Name_Imp_Casing : External_Casing_Type; 2422 Fast_Math : Boolean; 2423 Initialize_Scalars : Boolean; 2424 No_Component_Reordering : Boolean; 2425 Normalize_Scalars : Boolean; 2426 Optimize_Alignment : Character; 2427 Optimize_Alignment_Local : Boolean; 2428 Persistent_BSS_Mode : Boolean; 2429 Polling_Required : Boolean; 2430 Prefix_Exception_Messages : Boolean; 2431 SPARK_Mode : SPARK_Mode_Type; 2432 SPARK_Mode_Pragma : Node_Id; 2433 Uneval_Old : Character; 2434 Use_VADS_Size : Boolean; 2435 Warnings_As_Errors_Count : Natural; 2436 end record; 2437 2438 -- The following declarations are for GCC version dependent flags. We do 2439 -- not let client code in the compiler test GCC_Version directly, but 2440 -- instead use deferred constants for relevant feature tags. 2441 2442 -- Note: there currently are no such constants defined in this section, 2443 -- since the compiler front end is currently entirely independent of the 2444 -- GCC version, which is a desirable state of affairs. 2445 2446 function get_gcc_version return Int; 2447 pragma Import (C, get_gcc_version, "get_gcc_version"); 2448 2449 GCC_Version : constant Nat := get_gcc_version; 2450 -- GNATMAKE 2451 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that 2452 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported. 2453 2454end Opt; 2455