1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- O P T -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2020, 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. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNAT; see file COPYING3. If not, go to -- 19-- http://www.gnu.org/licenses for a complete copy of the license. -- 20-- -- 21-- GNAT was originally developed by the GNAT team at New York University. -- 22-- Extensive contributions were provided by Ada Core Technologies Inc. -- 23-- -- 24------------------------------------------------------------------------------ 25 26-- This package contains global flags set by the initialization routine from 27-- the command line and referenced throughout the compiler, the binder, or 28-- other GNAT tools. The comments indicate which options are used by which 29-- programs (GNAT, GNATBIND, GNATLINK, GNATMAKE, etc). 30 31-- Some flags are labelled "PROJECT MANAGER". These are used by tools that 32-- use the Project Manager. These tools include gnatmake, gnatname, the gnat 33-- driver, gnatclean, gprbuild and gprclean. 34 35with Hostparm; use Hostparm; 36with Types; use Types; 37 38pragma Warnings (Off); 39-- This package is used also by gnatcoll 40with System.Strings; use System.Strings; 41with System.WCh_Con; use System.WCh_Con; 42pragma Warnings (On); 43 44package Opt is 45 46 ---------------------- 47 -- Checksum Control -- 48 ---------------------- 49 50 -- Checksums are computed for sources to check for sources being the same 51 -- from a compilation point of view (e.g. spelling of identifiers and 52 -- white space layout do not count in this computation). 53 54 Checksum_Accumulate_Limited_Checksum : Boolean := False; 55 -- Used to control the computation of the limited view of a package. 56 -- (Not currently used, possible optimization for ALI files of units 57 -- in limited with_clauses). 58 59 ---------------------------------------------- 60 -- Settings of Modes for Current Processing -- 61 ---------------------------------------------- 62 63 -- The following mode values represent the current state of processing. 64 -- The values set here are the default values. Unless otherwise noted, 65 -- the value may be reset in Switch-? with an appropriate switch. In 66 -- some cases, the values can also be modified by pragmas, and in the 67 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify 68 -- the default values. 69 70 Latest_Ada_Only : Boolean := False; 71 -- If True, the only value valid for Ada_Version is Ada_Version_Type'Last, 72 -- trying to specify other values will be ignored (in case of pragma 73 -- Ada_xxx) or generate an error (in case of -gnat83/95/xx switches). 74 75 type Ada_Version_Type is (Ada_83, Ada_95, Ada_2005, Ada_2012, Ada_2020); 76 pragma Ordered (Ada_Version_Type); 77 pragma Convention (C, Ada_Version_Type); 78 -- Versions of Ada for Ada_Version below. Note that these are ordered, 79 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful. 80 -- Think twice before using "="; Ada_Version >= Ada_2012 is more likely 81 -- what you want, because it will apply to future versions of the language. 82 83 -- WARNING: There is a matching C declaration of this type in fe.h 84 85 Ada_Version_Default : constant Ada_Version_Type := Ada_2012; 86 pragma Warnings (Off, Ada_Version_Default); 87 -- GNAT 88 -- Default Ada version if no switch given. The Warnings off is to kill 89 -- constant condition warnings. 90 91 Ada_Version : Ada_Version_Type := Ada_Version_Default; 92 -- GNAT 93 -- Current Ada version for compiler, as set by configuration pragmas, 94 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a 95 -- predefined or internal file is compiled. 96 97 -- WARNING: There is a matching C declaration of this variable in fe.h 98 99 Ada_Version_Pragma : Node_Id := Empty; 100 -- Reflects the Ada_xxx pragma that resulted in setting Ada_Version. Used 101 -- to specialize error messages complaining about the Ada version in use. 102 103 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default; 104 -- GNAT 105 -- Like Ada_Version, but does not get set implicitly for predefined or 106 -- internal units, so it reflects the Ada version explicitly set using 107 -- configuration pragmas or compiler switches (or if neither appears, it 108 -- remains set to Ada_Version_Default). This is used in the rare cases 109 -- (notably pragma Obsolescent) where we want the explicit version set. 110 111 Ada_Version_Runtime : Ada_Version_Type := Ada_2020; 112 -- GNAT 113 -- Ada version used to compile the runtime. Used to set Ada_Version (but 114 -- not Ada_Version_Explicit) when compiling predefined or internal units. 115 116 Ada_Final_Suffix : constant String := "final"; 117 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix); 118 -- GNATBIND 119 -- The name of the procedure that performs the finalization at the end of 120 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 121 122 Ada_Init_Suffix : constant String := "init"; 123 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix); 124 -- GNATBIND 125 -- The name of the procedure that performs initialization at the start 126 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg. 127 128 Ada_Main_Name_Suffix : constant String := "main"; 129 -- GNATBIND 130 -- The suffix for Ada_Main_Name. Defined as a constant here so that it 131 -- can be referenced in a uniform manner to create either the default 132 -- value of Ada_Main_Name (declared below), or the non-default name 133 -- set by Gnatbind.Scan_Bind_Arg. 134 135 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix); 136 -- GNATBIND 137 -- The name of the Ada package generated by the binder (when in Ada mode). 138 -- This variable may be modified by Gnatbind.Scan_Bind_Arg. 139 140 Address_Clause_Overlay_Warnings : Boolean := True; 141 -- GNAT 142 -- Set False to disable address clause warnings. Modified by use of 143 -- -gnatwo/O. 144 145 Address_Is_Private : Boolean := False; 146 -- GNAT, GNATBIND 147 -- Set True if package System has the line "type Address is private;" 148 149 Aggregate_Individually_Assign : Boolean := False; 150 -- GNAT 151 -- Set True if record aggregates are to be always converted into assignment 152 -- statements. Set through the corresponding pragma. 153 154 All_Errors_Mode : Boolean := False; 155 -- GNAT 156 -- Flag set to force display of multiple errors on a single line and 157 -- also repeated error messages for references to undefined identifiers 158 -- and certain other repeated error messages. Set by use of -gnatf. 159 160 Allow_Integer_Address : Boolean := False; 161 -- GNAT 162 -- Allow use of integer expression in a context requiring System.Address. 163 -- Set by the use of configuration pragma Allow_Integer_Address. Also set 164 -- in relaxed semantics mode for use by CodePeer or when -gnatd.M is used. 165 166 All_Sources : Boolean := False; 167 -- GNATBIND 168 -- Set to True to require all source files to be present. This flag is 169 -- directly modified by gnatmake to affect the shared binder routines. 170 171 Alternate_Main_Name : String_Ptr := null; 172 -- GNATBIND 173 -- Set to non-null when Bind_Alternate_Main_Name is True. This value 174 -- is modified as needed by Gnatbind.Scan_Bind_Arg. 175 176 Assertions_Enabled : Boolean := False; 177 -- GNAT 178 -- Indicates default policy (True = Check, False = Ignore) to be applied 179 -- to all assertion aspects and pragmas, and to pragma Debug, if there is 180 -- no overriding Assertion_Policy, Check_Policy, or Debug_Policy pragma. 181 -- Set True by use of -gnata. 182 183 Assume_No_Invalid_Values : Boolean := False; 184 -- GNAT Normally, in accordance with (RM 13.9.1 (9-11)) the front end 185 -- assumes that values could have invalid representations, unless it can 186 -- clearly prove that the values are valid. If this switch is set (by 187 -- pragma Assume_No_Invalid_Values (On)), then the compiler assumes values 188 -- are valid and in range of their representations. This feature is now 189 -- fully enabled in the compiler. 190 191 Back_Annotate_Rep_Info : Boolean := False; 192 -- GNAT 193 -- If set True, enables back annotation of representation information 194 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR 195 -- (list representation information). It is also set true if certain 196 -- Unchecked_Conversion instantiations require checking based on annotated 197 -- values. 198 199 Back_End_Handles_Limited_Types : Boolean; 200 -- This flag is set true if the back end can properly handle limited or 201 -- other by reference types, and avoid copies. If this flag is False, then 202 -- the front end does special expansion for if/case expressions to make 203 -- sure that no copy occurs. If the flag is True, then the expansion for 204 -- if and case expressions relies on the back end properly handling things. 205 -- Currently the default is False for all cases (set in gnat1drv). The 206 -- default can be modified using -gnatd.L (sets the flag True). This is 207 -- used to test the possibility of having the backend handle this. 208 209 Back_End_Inlining : Boolean := False; 210 -- GNAT 211 -- Set True to activate inlining by back-end expansion. This is the normal 212 -- default mode for gcc targets, so it is True on such targets unless the 213 -- switches -gnatN or -gnatd.z are used. See circuitry in gnat1drv for the 214 -- exact conditions for setting this switch. 215 216 -- WARNING: There is a matching C declaration of this variable in fe.h 217 218 Bind_Alternate_Main_Name : Boolean := False; 219 -- GNATBIND 220 -- True if main should be called Alternate_Main_Name.all. 221 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg. 222 223 Bind_Main_Program : Boolean := True; 224 -- GNATBIND 225 -- Set to False if not binding main Ada program 226 227 Bind_For_Library : Boolean := False; 228 -- GNATBIND 229 -- Set to True if the binder needs to generate a file designed for building 230 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg. 231 232 Bind_Only : Boolean := False; 233 -- GNATMAKE, GPRBUILD 234 -- Set to True to skip compile and link steps 235 -- (except when Compile_Only and/or Link_Only are True). 236 237 Blank_Deleted_Lines : Boolean := False; 238 -- GNAT, GNATPREP 239 -- Output empty lines for each line of preprocessed input that is deleted 240 -- in the output, including preprocessor lines starting with a '#'. 241 242 Brief_Output : Boolean := False; 243 -- GNAT, GNATBIND 244 -- Force brief error messages to standard error, even if verbose mode is 245 -- set (so that main error messages go to standard output). 246 247 Build_Bind_And_Link_Full_Project : Boolean := False; 248 -- GNATMAKE 249 -- Set to True to build, bind and link all the sources of a project file 250 -- (switch -B) 251 252 Check_Aliasing_Of_Parameters : Boolean := False; 253 -- GNAT 254 -- Set to True to detect whether subprogram parameters and function results 255 -- alias the same object(s). 256 257 Check_Float_Overflow : Boolean := False; 258 -- GNAT 259 -- Set to True to check that operations on predefined unconstrained float 260 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 261 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 262 -- of the -gnateF switch. 263 264 Check_Object_Consistency : Boolean := False; 265 -- GNATBIND, GNATMAKE 266 -- Set to True to check whether every object file is consistent with its 267 -- corresponding ada library information (ALI) file. An object file is 268 -- inconsistent with the corresponding ALI file if the object file does 269 -- not exist or if it has an older time stamp than the ALI file. Default 270 -- above is for GNATBIND. GNATMAKE overrides this default to True (see 271 -- Make.Initialize) since we normally do need to check source consistencies 272 -- in gnatmake. 273 274 Check_Only : Boolean := False; 275 -- GNATBIND 276 -- Set to True to do checks only, no output of binder file 277 278 Check_Policy_List : Node_Id := Empty; 279 -- GNAT 280 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 281 -- that are linked through the Next_Pragma fields, with the list being 282 -- terminated by Empty. The order is most recently processed first. Note 283 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value 284 -- of this variable, implementing the required scope control for pragmas 285 -- appearing in a declarative part. 286 287 Check_Readonly_Files : Boolean := False; 288 -- GNATMAKE 289 -- Set to True to check readonly files during the make process 290 291 Check_Source_Files : Boolean := True; 292 -- GNATBIND, GNATMAKE 293 -- Set to True to enable consistency checking for any source files that 294 -- are present (i.e. date must match the date in the library info file). 295 -- Set to False for object file consistency check only. This flag is 296 -- directly modified by gnatmake, to affect the shared binder routines. 297 298 Check_Switches : Boolean := False; 299 -- GNATMAKE, GPBUILD 300 -- Set to True to check compiler options during the make process 301 302 Check_Unreferenced : Boolean := False; 303 -- GNAT 304 -- Set to True to enable checking for unreferenced entities other 305 -- than formal parameters (for which see Check_Unreferenced_Formals) 306 -- Modified by use of -gnatwu/U. 307 308 Check_Unreferenced_Formals : Boolean := False; 309 -- GNAT 310 -- Set to True to check for unreferenced formals. This is turned on by 311 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU. 312 313 Check_Validity_Of_Parameters : Boolean := False; 314 -- GNAT 315 -- Set to True to check for proper scalar initialization of subprogram 316 -- parameters on both entry and exit. This is turned on by -gnateV. 317 318 Check_Withs : Boolean := False; 319 -- GNAT 320 -- Set to True to enable checking for unused withs, and also the case 321 -- of withing a package and using none of the entities in the package. 322 -- Modified by use of -gnatwu/U. 323 324 CodePeer_Mode : Boolean := False; 325 -- GNAT, GNATBIND, GPRBUILD 326 -- Enable full CodePeer mode (SCIL generation, disable switches that 327 -- interact badly with it, etc...). This is turned on by -gnatC. 328 329 Commands_To_Stdout : Boolean := False; 330 -- GNATMAKE 331 -- True if echoed commands to be written to stdout instead of stderr 332 333 Comment_Deleted_Lines : Boolean := False; 334 -- GNATPREP 335 -- True if source lines removed by the preprocessor should be commented 336 -- in the output file. 337 338 Compilation_Time : String (1 .. 19); 339 -- GNAT 340 -- Compilation date and time in form YYYY-MM-DD HH:MM:SS 341 342 Compile_Only : Boolean := False; 343 -- GNATMAKE, GNATCLEAN, GPBUILD, GPRCLEAN 344 -- GNATMAKE, GPRBUILD: 345 -- set True to skip bind and link steps (except when Bind_Only is True) 346 -- GNATCLEAN, GPRCLEAN: 347 -- set True to delete only the files produced by the compiler but not the 348 -- library files or the executable files. 349 350 Compiler_Unit : Boolean := False; 351 -- GNAT1 352 -- Set True by an occurrence of pragma Compiler_Unit_Warning (or of the 353 -- obsolete pragma Compiler_Unit) in the main unit. Once set True, stays 354 -- True, since any units that are with'ed directly or indirectly by 355 -- a Compiler_Unit_Warning main unit are subject to the same restrictions. 356 -- Such units really should have their own pragmas, but we do not bother to 357 -- check for that, so this transitivity provides extra checking. 358 359 Config_File : Boolean := True; 360 -- GNAT 361 -- Set to False to inhibit reading and processing of gnat.adc file 362 363 Config_File_Names : String_List_Access := null; 364 -- GNAT 365 -- Names of configuration pragmas files (given by switches -gnatec) 366 367 Config_Files_Store_Basename : Boolean := False; 368 -- GNAT 369 -- Set True for -gnateb. Tells GNAT that config files should be referred to 370 -- by their basename and their checksums computed in ALI files. 371 372 Configurable_Run_Time_Mode : Boolean := False; 373 -- GNAT, GNATBIND 374 -- Set True if the compiler is operating in configurable run-time mode. 375 -- This happens if the flag Targparm.Configurable_Run_Time_On_Target is 376 -- True, or if pragma No_Run_Time is used. See the spec of Rtsfind for 377 -- details on the handling of the latter pragma. 378 379 Constant_Condition_Warnings : Boolean := False; 380 -- GNAT 381 -- Set to True to activate warnings on constant conditions. Modified by 382 -- use of -gnatwc/C. 383 384 Create_Mapping_File : Boolean := False; 385 -- GNATMAKE 386 -- Set to True (-C switch) to indicate that the compiler will be invoked 387 -- with a mapping file (-gnatem compiler switch). 388 389 subtype Debug_Level_Value is Nat range 0 .. 3; 390 Debugger_Level : Debug_Level_Value := 0; 391 -- GNAT, GNATBIND 392 -- The value given to the -g parameter. The default value for -g with 393 -- no value is 2. If no -g is specified, defaults to 0. 394 -- Note that the generated code should never depend on this variable, 395 -- since we want debug info to be nonintrusive on the generate code. 396 397 Default_Exit_Status : Int := 0; 398 -- GNATBIND 399 -- Set the default exit status value. Set by the -Xnnn switch for the 400 -- binder. 401 402 Debug_Generated_Code : Boolean := False; 403 -- GNAT 404 -- Set True (-gnatD switch) to debug generated expanded code instead 405 -- of the original source code. Causes debugging information to be 406 -- written with respect to the generated code file that is written. 407 408 -- WARNING: There is a matching C declaration of this variable in fe.h 409 410 Default_Pool : Node_Id := Empty; 411 -- GNAT 412 -- Used to record the storage pool name (or null literal) that is the 413 -- argument of an applicable pragma Default_Storage_Pool. 414 -- Empty: No pragma Default_Storage_Pool applies. 415 -- N_Null node: "pragma Default_Storage_Pool (null);" applies. 416 -- otherwise: "pragma Default_Storage_Pool (X);" applies, and 417 -- this points to the name X. 418 -- Push_Scope and Pop_Scope in Sem_Ch8 save and restore this value. 419 420 No_Stack_Size : constant := -1; 421 422 Default_Stack_Size : Int := No_Stack_Size; 423 -- GNATBIND 424 -- Set to default primary stack size in units of bytes. Set by the -dnnn 425 -- switch for the binder. A value of No_Stack_Size indicates that 426 -- no default was set by the binder. 427 428 Default_Sec_Stack_Size : Int := No_Stack_Size; 429 -- GNATBIND 430 -- Set to default secondary stack size in units of bytes. Set by the -Dnnn 431 -- switch for the binder. A value of No_Stack_Size indicates that no 432 -- default was set by the binder and the run-time value should be used 433 -- instead. 434 435 Default_SSO : Character := ' '; 436 -- GNAT 437 -- Set if a pragma Default_Scalar_Storage_Order has been given. The value 438 -- of ' ' indicates that no default has been set, otherwise the value is 439 -- either 'H' for High_Order_First or 'L' for Lower_Order_First. 440 441 Detect_Blocking : Boolean := False; 442 -- GNAT 443 -- Set True to force the run time to raise Program_Error if calls to 444 -- potentially blocking operations are detected from protected actions. 445 446 Directories_Must_Exist_In_Projects : Boolean := True; 447 -- PROJECT MANAGER 448 -- Set to False with switch -f of gnatclean and gprclean 449 450 Disable_FE_Inline : Boolean := False; 451 -- GNAT 452 -- Request to disable front end inlining from pragma Inline in the 453 -- presence of the -fno-inline back end flag on the command line, 454 -- regardless of any other switches that are set. 455 -- It remains the back end's reponsibility to honor -fno-inline at the 456 -- back end level. 457 458 Display_Compilation_Progress : Boolean := False; 459 -- GNATMAKE, GPRBUILD 460 -- Set True (-d switch) to display information on progress while compiling 461 -- files. Internal flag to be used in conjunction with an IDE 462 -- (e.g GNAT Studio). 463 464 type Distribution_Stub_Mode_Type is 465 -- GNAT 466 (No_Stubs, 467 -- Normal mode, no generation of distribution stubs 468 469 Generate_Receiver_Stub_Body, 470 -- The unit being compiled is the RCI body, and the compiler will 471 -- generate the body for the receiver stubs and compile it. 472 473 Generate_Caller_Stub_Body); 474 -- The unit being compiled is the RCI spec, and the compiler will 475 -- generate the body for the caller stubs and compile it. 476 477 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs; 478 -- GNAT 479 -- This enumeration variable indicates the three states of distribution 480 -- annex stub generation. 481 482 Do_Not_Execute : Boolean := False; 483 -- GNATMAKE 484 -- Set to True if no actual compilations should be undertaken 485 486 Dump_Source_Text : Boolean := False; 487 -- GNAT 488 -- Set to True (by -gnatL) to dump source text intermingled with generated 489 -- code. Effective only if either of Debug/Print_Generated_Code is true. 490 491 Dynamic_Elaboration_Checks : Boolean := False; 492 -- GNAT 493 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 494 -- switch or by the use of pragma Elaboration_Checks (Dynamic). 495 496 Dynamic_Stack_Measurement : Boolean := False; 497 -- GNATBIND 498 -- Set True to enable dynamic stack measurement (-u flag for gnatbind) 499 500 Dynamic_Stack_Measurement_Array_Size : Nat := 100; 501 -- GNATBIND 502 -- Number of measurements we want to store during dynamic stack analysis. 503 -- When the buffer is full, non-storable results will be output on the fly. 504 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set 505 -- by processing of -u flag for gnatbind. 506 507 Elab_Dependency_Output : Boolean := False; 508 -- GNATBIND 509 -- Set to True to output complete list of elaboration constraints 510 511 Elab_Order_Output : Boolean := False; 512 -- GNATBIND 513 -- Set to True to output chosen elaboration order 514 515 Elab_Info_Messages : Boolean := False; 516 -- GNAT 517 -- Set to True to output info messages for static elabmodel (-gnatel) 518 519 Elab_Warnings : Boolean := True; 520 -- GNAT 521 -- Set to True to generate elaboration warnings (-gnatwl). The warnings are 522 -- enabled by default because they carry the same importance as errors. The 523 -- compiler cannot emit actual errors because elaboration diagnostics need 524 -- dataflow analysis, which is not available. This behavior parallels that 525 -- of the old ABE mechanism. 526 527 Enable_128bit_Types : Boolean := False; 528 -- GNAT 529 -- Set to True to enable the support for 128-bit types in the compiler. 530 -- The prerequisite is a 64-bit target that supports 128-bit computation. 531 532 -- WARNING: There is a matching C declaration of this variable in fe.h 533 534 Error_Msg_Line_Length : Nat := 0; 535 -- GNAT 536 -- Records the error message line length limit. If this is set to zero, 537 -- then we get the old style behavior, in which each call to the error 538 -- message routines generates one line of output as a separate message. 539 -- If it is set to a non-zero value, then continuation lines are folded 540 -- to make a single long message, and then this message is split up into 541 -- multiple lines not exceeding the specified length. Set by -gnatj=nn. 542 543 Error_To_Warning : Boolean := False; 544 -- GNAT 545 -- If True, then certain error messages (e.g. parameter overlap messages 546 -- for procedure calls in Ada 2012 mode) are treated as warnings instead 547 -- of errors. Set by debug flag -gnatd.E. A search for Error_To_Warning 548 -- will identify affected messages. 549 550 Exception_Handler_Encountered : Boolean := False; 551 -- GNAT 552 -- This flag is set true if the parser encounters an exception handler. 553 -- It is used to set Warn_On_Exception_Propagation True if the restriction 554 -- No_Exception_Propagation is set. 555 556 Exception_Extra_Info : Boolean := False; 557 -- GNAT 558 -- True when switch -gnateE is used. When True, generate extra information 559 -- associated with exception messages (in particular range and index 560 -- checks). 561 562 -- WARNING: There is a matching C declaration of this variable in fe.h 563 564 Exception_Locations_Suppressed : Boolean := False; 565 -- GNAT 566 -- Set to True if a Suppress_Exception_Locations configuration pragma is 567 -- currently active. 568 569 -- WARNING: There is a matching C declaration of this variable in fe.h 570 571 type Exception_Mechanism_Type is 572 -- Determines the kind of mechanism used to handle exceptions 573 -- 574 (Front_End_SJLJ, 575 -- Exceptions use setjmp/longjmp generated explicitly by the front end 576 -- (this includes gigi or other equivalent parts of the code generator). 577 -- AT END handlers are converted into exception handlers by the front 578 -- end in this mode. 579 580 Back_End_ZCX, 581 -- Exceptions are handled by the back end. The front end simply 582 -- generates the handlers as they appear in the source, and AT END 583 -- handlers are left untouched (they are not converted into exception 584 -- handlers when operating in this mode). Propagation is performed 585 -- using a frame unwinding scheme and requires no particular setup code 586 -- at handler sites on regular execution paths. 587 588 Back_End_SJLJ); 589 -- Similar to Back_End_ZCX with respect to the front-end processing 590 -- of regular and AT-END handlers. A setjmp/longjmp scheme is used to 591 -- propagate and setup handler contexts on regular execution paths. 592 pragma Convention (C, Exception_Mechanism_Type); 593 594 -- WARNING: There is a matching C declaration of this type in fe.h 595 596 Exception_Mechanism : Exception_Mechanism_Type := Front_End_SJLJ; 597 -- GNAT 598 -- Set to the appropriate value depending on the flags in system.ads 599 -- (Frontend_Exceptions + ZCX_By_Default). The C convention is there to 600 -- allow access by gigi. 601 602 -- WARNING: There is a matching C declaration of this variable in fe.h 603 604 function Back_End_Exceptions return Boolean; 605 function Front_End_Exceptions return Boolean; 606 function ZCX_Exceptions return Boolean; 607 function SJLJ_Exceptions return Boolean; 608 -- GNAT 609 -- Various properties of the active Exception_Mechanism 610 611 -- WARNING: There is a matching C declaration of these subprograms in fe.h 612 613 Exception_Tracebacks : Boolean := False; 614 -- GNATBIND 615 -- Set to True to store tracebacks in exception occurrences (-Ea or -E) 616 617 Exception_Tracebacks_Symbolic : Boolean := False; 618 -- GNATBIND 619 -- Set to True to store tracebacks in exception occurrences and enable 620 -- symbolic tracebacks (-Es). 621 622 Expand_Nonbinary_Modular_Ops : Boolean := False; 623 -- Set to True to convert nonbinary modular additions into code 624 -- that relies on the front-end expansion of operator Mod. 625 626 Extensions_Allowed : Boolean := False; 627 -- GNAT 628 -- Set to True by switch -gnatX if GNAT specific language extensions 629 -- are allowed. See GNAT RM for details. 630 631 type External_Casing_Type is ( 632 As_Is, -- External names cased as they appear in the Ada source 633 Uppercase, -- External names forced to all uppercase letters 634 Lowercase); -- External names forced to all lowercase letters 635 636 External_Name_Imp_Casing : External_Casing_Type := Lowercase; 637 -- GNAT 638 -- The setting of this flag determines the casing of external names 639 -- when the name is implicitly derived from an entity name (i.e. either 640 -- no explicit External_Name or Link_Name argument is used, or, in the 641 -- case of extended DEC pragmas, the external name is given using an 642 -- identifier. The As_Is setting is not permitted here (since this would 643 -- create Ada source programs that were case sensitive). 644 645 External_Name_Exp_Casing : External_Casing_Type := As_Is; 646 -- GNAT 647 -- The setting of this flag determines the casing of an external name 648 -- specified explicitly with a string literal. As_Is means the string 649 -- literal is used as given with no modification to the casing. If 650 -- Lowercase or Uppercase is set, then the string is forced to all 651 -- lowercase or all uppercase letters as appropriate. Note that this 652 -- setting has no effect if the external name is given using an identifier 653 -- in the case of extended DEC import/export pragmas (in this case the 654 -- casing is controlled by External_Name_Imp_Casing), and also has no 655 -- effect if an explicit Link_Name is supplied (a link name is always 656 -- used exactly as given). 657 658 External_Unit_Compilation_Allowed : Boolean := False; 659 -- GNATMAKE 660 -- When True (set by gnatmake switch -x), allow compilation of sources 661 -- that are not part of any project file. 662 663 Fast_Math : Boolean := False; 664 -- GNAT 665 -- Indicates the current setting of Fast_Math mode, as set by the use 666 -- of a Fast_Math pragma (set True by Fast_Math (On)). 667 668 Force_ALI_File : Boolean := False; 669 -- GNAT 670 -- Force generation of ALI file even if errors are encountered. 671 -- Set on by use of -gnatQ. 672 673 Disable_ALI_File : Boolean := False; 674 -- GNAT 675 -- Disable generation of ALI file 676 677 Follow_Links_For_Files : Boolean := False; 678 -- PROJECT MANAGER 679 -- Set to True (-eL) to process the project files in trusted mode. If 680 -- Follow_Links is False, it is assumed that the project doesn't contain 681 -- any file duplicated through symbolic links (although the latter are 682 -- still valid if they point to a file which is outside of the project), 683 -- and that no directory has a name which is a valid source name. 684 685 Follow_Links_For_Dirs : Boolean := False; 686 -- PROJECT MANAGER 687 -- Set to True if directories can be links in this project, and therefore 688 -- additional system calls must be performed to ensure that we always see 689 -- the same full name for each directory. 690 691 Force_Checking_Of_Elaboration_Flags : Boolean := False; 692 -- GNATBIND 693 -- True if binding with forced checking of the elaboration flags 694 -- (-F switch set). 695 696 Force_Compilations : Boolean := False; 697 -- GNATMAKE, GPRBUILD 698 -- Set to force recompilations even when the objects are up-to-date. 699 700 Force_Elab_Order_File : String_Ptr := null; 701 -- GNATBIND 702 -- File name specified for -f switch (the forced elaboration order file) 703 704 Front_End_Inlining : Boolean := False; 705 -- GNAT 706 -- Set True to activate inlining by front-end expansion (even on GCC 707 -- targets, where inlining is normally handled by the back end). Set by 708 -- the flag -gnatN (which is now considered obsolescent, since the GCC 709 -- back end can do a better job of inlining than the front end these days). 710 711 Full_Path_Name_For_Brief_Errors : Boolean := False; 712 -- PROJECT MANAGER 713 -- When True, in Brief_Output mode, each error message line will start with 714 -- the full path name of the source. When False, only the file name without 715 -- directory information is used. 716 717 Full_List : Boolean := False; 718 -- GNAT 719 -- Set True to generate full source listing with embedded errors 720 721 Full_List_File_Name : String_Ptr := null; 722 -- GNAT 723 -- Set to file name to generate full source listing to named file (or if 724 -- the name is of the form .xxx, then to name.xxx where name is the source 725 -- file name with extension stripped. 726 727 Generate_Asm : Boolean := False; 728 -- GNAT 729 -- True if generating assembly instead of an object file, via the -S switch 730 731 Generate_C_Code : Boolean := False; 732 -- GNAT, GNATBIND 733 -- If True, the Cprint circuitry to generate C code output is activated. 734 -- Set True by use of -gnateg or -gnatd.V for GNAT, and -G for GNATBIND. 735 736 Generate_CodePeer_Messages : Boolean := False; 737 -- GNAT 738 -- Generate CodePeer messages. Ignored if CodePeer_Mode is false. This is 739 -- turned on by -gnateC. 740 741 Generate_Processed_File : Boolean := False; 742 -- GNAT 743 -- True when switch -gnateG is used. When True, create in a file 744 -- <source>.prep, if the source is preprocessed. 745 746 Generate_SCIL : Boolean := False; 747 -- GNAT 748 -- Set True to activate SCIL code generation. 749 750 Generate_SCO : Boolean := False; 751 -- GNAT 752 -- True when switch -fdump-scos (or -gnateS) is used. When True, Source 753 -- Coverage Obligation (SCO) information is generated and output in the ALI 754 -- file. See unit Par_SCO for full details. 755 756 Generate_SCO_Instance_Table : Boolean := False; 757 -- GNAT 758 -- True when switch -fdump-scos is used. When True, a table of instances is 759 -- included in SCOs. 760 761 -- WARNING: There is a matching C declaration of this variable in fe.h 762 763 Generating_Code : Boolean := False; 764 -- GNAT 765 -- True if the frontend finished its work and has called the backend to 766 -- process the tree and generate the object file. 767 768 type Ghost_Mode_Type is (None, Check, Ignore); 769 -- Possible legal modes that can be set by aspect/pragma Ghost as well as 770 -- value None, which indicates that no such aspect/pragma applies. 771 772 Ghost_Mode : Ghost_Mode_Type := None; 773 -- GNAT 774 -- The current Ghost mode in effect 775 776 Global_Discard_Names : Boolean := False; 777 -- GNAT, GNATBIND 778 -- True if a pragma Discard_Names appeared as a configuration pragma for 779 -- the current compilation unit. 780 781 GNAT_Encodings : Int; 782 pragma Import (C, GNAT_Encodings, "gnat_encodings"); 783 -- Constant controlling the balance between GNAT encodings and standard 784 -- DWARF to emit in the debug information. It accepts the following values. 785 786 DWARF_GNAT_Encodings_All : constant Int := 0; 787 DWARF_GNAT_Encodings_GDB : constant Int := 1; 788 DWARF_GNAT_Encodings_Minimal : constant Int := 2; 789 790 Identifier_Character_Set : Character; 791 -- GNAT 792 -- This variable indicates the character set to be used for identifiers. 793 -- The possible settings are: 794 -- '1' Latin-1 (ISO-8859-1) 795 -- '2' Latin-2 (ISO-8859-2) 796 -- '3' Latin-3 (ISO-8859-3) 797 -- '4' Latin-4 (ISO-8859-4) 798 -- '5' Latin-Cyrillic (ISO-8859-5) 799 -- '9' Latin-9 (ISO-8859-15) 800 -- 'p' PC (US, IBM page 437) 801 -- '8' PC (European, IBM page 850) 802 -- 'f' Full upper set (all distinct) 803 -- 'n' No upper characters (Ada 83 rules) 804 -- 'w' Latin-1 plus wide characters allowed in identifiers 805 -- 806 -- The setting affects the set of letters allowed in identifiers and the 807 -- upper/lower case equivalences. It does not affect the interpretation of 808 -- character and string literals, which are always stored using the actual 809 -- coding in the source program. This variable is initialized to the 810 -- default value appropriate to the system (in Osint.Initialize), and then 811 -- reset if a command line switch is used to change the setting. 812 813 Ignore_Rep_Clauses : Boolean := False; 814 -- GNAT 815 -- Set True to ignore all representation clauses. Useful when compiling 816 -- code from foreign compilers for checking purposes. Can be 817 -- set True by use of -gnatI. 818 819 Ignore_SPARK_Mode_Pragmas_In_Instance : Boolean := False; 820 -- GNAT 821 -- Set True to ignore the semantics and effects of pragma SPARK_Mode when 822 -- the pragma appears inside an instance whose enclosing context is subject 823 -- to SPARK_Mode "off". This property applies to nested instances. 824 825 Ignore_Style_Checks_Pragmas : Boolean := False; 826 -- GNAT 827 -- Set True to ignore all Style_Checks pragmas. Can be set True by use 828 -- of -gnateY. 829 830 Ignore_Unrecognized_VWY_Switches : Boolean := False; 831 -- GNAT 832 -- Set True to ignore unrecognized y, V, w switches. Can be set True by 833 -- use of -gnateu, causing subsequent unrecognized switches to result in 834 -- a warning rather than an error. 835 836 Ignored_Ghost_Region : Node_Id := Empty; 837 -- GNAT 838 -- The start of the current ignored Ghost region. This value must always 839 -- reflect the starting node of the outermost ignored Ghost region. If a 840 -- nested ignored Ghost region is entered, the value must remain unchanged. 841 842 Implementation_Unit_Warnings : Boolean := True; 843 -- GNAT 844 -- Set True to active warnings for use of implementation internal units. 845 -- Modified by use of -gnatwi/-gnatwI. 846 847 Implicit_Packing : Boolean := False; 848 -- GNAT 849 -- If set True, then a Size attribute clause on an array is allowed to 850 -- cause implicit packing instead of generating an error message. Set by 851 -- use of pragma Implicit_Packing. 852 853 Include_Subprogram_In_Messages : Boolean := False; 854 -- GNAT 855 -- Set True to include the enclosing subprogram in compiler messages. 856 857 Ineffective_Inline_Warnings : Boolean := False; 858 -- GNAT 859 -- Set True to activate warnings if front-end inlining (-gnatN) is not able 860 -- to actually inline a particular call (or all calls). Can be controlled 861 -- by use of -gnatwp/-gnatwP. Also set True to activate warnings if 862 -- frontend inlining is not able to inline a subprogram expected to 863 -- be inlined in GNATprove mode. 864 865 Init_Or_Norm_Scalars : Boolean := False; 866 -- GNAT, GNATBIND 867 -- Set True if a pragma Initialize_Scalars applies to the current unit. 868 -- Also set True if a pragma Restriction (Normalize_Scalars) applies. 869 870 Initialize_Scalars : Boolean := False; 871 -- GNAT 872 -- Set True if a pragma Initialize_Scalars applies to the current unit. 873 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 874 875 Initialize_Scalars_Mode1 : Character := 'I'; 876 Initialize_Scalars_Mode2 : Character := 'N'; 877 -- GNATBIND 878 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default 879 -- is IN (invalid values), used if no -S switch is used. 880 881 Inline_Active : Boolean := False; 882 -- GNAT 883 -- Set True to activate pragma Inline processing across modules. Default 884 -- for now is not to inline across module boundaries. 885 886 Inline_Level : Nat := 0; 887 -- GNAT 888 -- Set to indicate the inlining level: 0 means that an appropriate value is 889 -- to be computed by the compiler based on the optimization level (-gnatn), 890 -- 1 is for moderate inlining across modules (-gnatn1) and 2 for full 891 -- inlining across modules (-gnatn2). 892 893 Interface_Library_Unit : Boolean := False; 894 -- GNATBIND 895 -- Set to True to indicate that at least one ALI file is an interface ALI: 896 -- then elaboration flag checks are to be generated in the binder 897 -- generated file. 898 899 Invalid_Value_Used : Boolean := False; 900 -- GNAT 901 -- Set True if a valid Invalid_Value attribute is encountered 902 903 Inline_Processing_Required : Boolean := False; 904 -- GNAT 905 -- Set True if inline processing is required. Inline processing is required 906 -- if an active Inline pragma is processed. The flag is set for a pragma 907 -- Inline or Inline_Always that is actually active. 908 909 In_Place_Mode : Boolean := False; 910 -- GNATMAKE 911 -- Set True to store ALI and object files in place i.e. in the object 912 -- directory if these files already exist or in the source directory 913 -- if not. 914 915 Keep_Going : Boolean := False; 916 -- GNATMAKE, GPRBUILD 917 -- When True signals to ignore compilation errors and keep processing 918 -- sources until there is no more work. 919 920 Keep_Temporary_Files : Boolean := False; 921 -- GNATCMD, GNATMAKE, GPRBUILD 922 -- When True the temporary files are not deleted. Set by switches -dn or 923 -- --keep-temp-files. 924 925 Leap_Seconds_Support : Boolean := False; 926 -- GNATBIND 927 -- Set to True to enable leap seconds support in Ada.Calendar and its 928 -- children. Set by -y. 929 930 Legacy_Elaboration_Checks : Boolean := False; 931 -- GNAT 932 -- Set to True when the pre-18.x access-before-elaboration model is to be 933 -- used. Modified by use of -gnatH. 934 935 Legacy_Elaboration_Order : Boolean := False; 936 -- GNATBIND 937 -- Set to True when the pre-20.x elaboration-order model is to be used. 938 -- Modified by use of -H. 939 940 Link_Only : Boolean := False; 941 -- GNATMAKE, GPRBUILD 942 -- Set to True to skip compile and bind steps (except when Bind_Only is 943 -- set to True). 944 945 List_Body_Required_Info : Boolean := False; 946 -- GNATMAKE 947 -- List info messages about why a package requires a body. Modified by use 948 -- of -gnatw.y/.Y. 949 950 List_Inherited_Aspects : Boolean := False; 951 -- GNAT 952 -- List inherited invariants, preconditions, and postconditions from 953 -- Invariant'Class, Pre'Class, and Post'Class aspects. Also list inherited 954 -- subtype predicates. Modified by use of -gnatw.l/.L. 955 956 List_Restrictions : Boolean := False; 957 -- GNATBIND 958 -- Set to True to list restrictions pragmas that could apply to partition 959 960 List_Units : Boolean := False; 961 -- GNAT 962 -- List units in the active library for a compilation (-gnatu switch) 963 964 List_Closure : Boolean := False; 965 -- GNATBIND 966 -- List all sources in the closure of a main (-R or -Ra gnatbind switch) 967 968 List_Closure_All : Boolean := False; 969 -- GNATBIND 970 -- List all sources in closure of main including run-time units (-Ra 971 -- gnatbind switch). 972 973 List_Dependencies : Boolean := False; 974 -- GNATMAKE 975 -- When True gnatmake verifies that the objects are up to date and outputs 976 -- the list of object dependencies (-M switch). Output depends if -a switch 977 -- is used or not. This list can be used directly in a Makefile. 978 979 List_Representation_Info : Int range 0 .. 4 := 0; 980 -- GNAT 981 -- Set non-zero by -gnatR switch to list representation information. 982 -- The settings are as follows: 983 -- 984 -- 0 = no listing of representation information (default as above) 985 -- 1 = list rep info for user-defined record and array types 986 -- 2 = list rep info for all user-defined types and objects 987 -- 3 = like 2, but variable fields are decoded symbolically 988 -- 4 = like 3, but list rep info for relevant compiler-generated types 989 990 -- WARNING: There is a matching C declaration of this variable in fe.h 991 992 List_Representation_Info_To_File : Boolean := False; 993 -- GNAT 994 -- Set true by -gnatRs switch. Causes information from -gnatR[1-4]m to be 995 -- written to file.rep (where file is the name of the source file) instead 996 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then 997 -- representation info is written to x.adb.ref. 998 999 List_Representation_Info_To_JSON : Boolean := False; 1000 -- GNAT 1001 -- Set true by -gnatRj switch. Causes information from -gnatR[1-4]m to be 1002 -- output in the JSON data interchange format. 1003 1004 List_Representation_Info_Mechanisms : Boolean := False; 1005 -- GNAT 1006 -- Set true by -gnatRm switch. Causes information on mechanisms to be 1007 -- included in the representation output information. 1008 1009 List_Representation_Info_Extended : Boolean := False; 1010 -- GNAT 1011 -- Set true by -gnatRe switch. Causes extended information for record types 1012 -- to be included in the representation output information. 1013 1014 List_Preprocessing_Symbols : Boolean := False; 1015 -- GNAT, GNATPREP 1016 -- Set to True if symbols for preprocessing a source are to be listed 1017 -- before preprocessing occurs. Set to True by switch -s of gnatprep or 1018 -- -s in preprocessing data file for the compiler. 1019 1020 XDR_Stream : Boolean := False; 1021 -- GNATBIND 1022 -- Set to True to enable XDR in s-stratt.adb. Set by -xdr. 1023 1024 type Create_Repinfo_File_Proc is access procedure (Src : String); 1025 type Write_Repinfo_Line_Proc is access procedure (Info : String); 1026 type Close_Repinfo_File_Proc is access procedure; 1027 -- Types used for procedure addresses below 1028 1029 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null; 1030 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null; 1031 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null; 1032 -- GNAT 1033 -- These three locations are left null when operating in non-compiler (e.g. 1034 -- ASIS mode), but when operating in compiler mode, they are set to point 1035 -- to the three corresponding procedures in Osint-C. The reason for this 1036 -- slightly strange interface is to stop Repinfo from dragging in Osint in 1037 -- ASIS mode, which would include lots of unwanted units in the ASIS build. 1038 -- ??? Revisit this now that ASIS mode is gone. 1039 1040 type Create_List_File_Proc is access procedure (S : String); 1041 type Write_List_Info_Proc is access procedure (S : String); 1042 type Close_List_File_Proc is access procedure; 1043 -- Types used for procedure addresses below 1044 1045 Create_List_File_Access : Create_List_File_Proc := null; 1046 Write_List_Info_Access : Write_List_Info_Proc := null; 1047 Close_List_File_Access : Close_List_File_Proc := null; 1048 -- GNAT 1049 -- These three locations are left null when operating in non-compiler 1050 -- (e.g. from the binder), but when operating in compiler mode, they are 1051 -- set to point to the three corresponding procedures in Osint-C. The 1052 -- reason for this slightly strange interface is to prevent Repinfo 1053 -- from dragging in Osint-C in the binder, which would include unwanted 1054 -- units in the binder. 1055 1056 Locking_Policy : Character := ' '; 1057 -- GNAT, GNATBIND 1058 1059 -- Set to ' ' for the default case (no locking policy specified). Otherwise 1060 -- set based on the pragma Locking_Policy: 1061 -- Ceiling_Locking: 'C' 1062 -- Concurrent_Readers_Locking: 'R' 1063 -- Inheritance_Locking: 'I' 1064 1065 Locking_Policy_Sloc : Source_Ptr := No_Location; 1066 -- GNAT, GNATBIND 1067 -- Remember location of previous Locking_Policy pragma. This is used for 1068 -- inconsistency error messages. A value of System_Location is used if the 1069 -- policy is set in package System. 1070 1071 Look_In_Primary_Dir : Boolean := True; 1072 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN 1073 -- Set to False if a -I- was present on the command line. When True we are 1074 -- allowed to look in the primary directory to locate other source or 1075 -- library files. 1076 1077 Make_Steps : Boolean := False; 1078 -- GNATMAKE 1079 -- Set to True when either Compile_Only, Bind_Only or Link_Only is 1080 -- set to True. 1081 1082 Main_Index : Int := 0; 1083 -- GNATMAKE 1084 -- This is set to non-zero by gnatmake switch -eInnn to indicate that 1085 -- the main program is the nnn unit in a multi-unit source file. 1086 1087 Mapping_File_Name : String_Ptr := null; 1088 -- GNAT 1089 -- File name of mapping between unit names, file names and path names. 1090 -- (given by switch -gnatem) 1091 1092 Maximum_Messages : Int := 9999; 1093 -- GNAT, GNATBIND 1094 -- Maximum default number of errors before compilation is terminated, or in 1095 -- the case of GNAT, maximum number of warnings before further warnings are 1096 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch. 1097 1098 Maximum_File_Name_Length : Int; 1099 -- GNAT, GNATBIND 1100 -- Maximum number of characters allowed in a file name, not counting the 1101 -- extension, as set by the appropriate switch. If no switch is given, 1102 -- then this value is initialized by Osint to the appropriate value. 1103 1104 Maximum_Instantiations : Int := 8000; 1105 -- GNAT 1106 -- Maximum number of instantiations permitted (to stop runaway cases 1107 -- of nested instantiations). These situations probably only occur in 1108 -- specially concocted test cases. Can be modified by -gnateinn switch. 1109 1110 Maximum_Processes : Positive := 1; 1111 -- GNATMAKE, GPRBUILD 1112 -- Maximum number of processes that should be spawned to carry out 1113 -- compilations. 1114 1115 Minimal_Binder : Boolean := False; 1116 -- GNATBIND 1117 -- Set to True to suppress the generation of objects by the binder that 1118 -- are not strictly required for a program to run. Intended for ZFP 1119 -- applications that have tight memory constraints. 1120 1121 Minimal_Recompilation : Boolean := False; 1122 -- GNATMAKE 1123 -- Set to True if minimal recompilation mode requested 1124 1125 Minimize_Expression_With_Actions : Boolean := False; 1126 -- GNAT 1127 -- If True, minimize the use of N_Expression_With_Actions node. 1128 -- This can be used in particular on some back-ends where this node is 1129 -- difficult to support. 1130 1131 Modify_Tree_For_C : Boolean := False; 1132 -- GNAT 1133 -- If this switch is set True (currently it is set only by -gnatd.V), then 1134 -- certain meaning-preserving transformations are applied to the tree to 1135 -- make it easier to interface with back ends that implement C semantics. 1136 -- There is a section in Sinfo which describes the transformations made. 1137 1138 Multiple_Unit_Index : Nat := 0; 1139 -- GNAT 1140 -- This is set non-zero if the current unit is being compiled in multiple 1141 -- unit per file mode, meaning that the current unit is selected from the 1142 -- sequence of units in the current source file, using the value stored 1143 -- in this variable (e.g. 2 = select second unit in file). A value of 1144 -- zero indicates that we are in normal (one unit per file) mode. 1145 1146 No_Backup : Boolean := False; 1147 -- GNATNAME 1148 -- Do not create backup copies of project files. Set by switch --no-backup. 1149 1150 No_Component_Reordering : Boolean := False; 1151 -- GNAT 1152 -- Set True if pragma No_Component_Reordering with no parameter encountered 1153 1154 No_Deletion : Boolean := False; 1155 -- GNATPREP 1156 -- Set by preprocessor switch -a. Do not eliminate any source text. Implies 1157 -- Undefined_Symbols_Are_False. Useful to perform a syntax check on all 1158 -- branches of #if constructs. 1159 1160 No_Elab_Code_All_Pragma : Node_Id := Empty; 1161 -- Set to point to a No_Elaboration_Code_All pragma or aspect encountered 1162 -- in the spec of the extended main unit. Used to determine if we need to 1163 -- do special tests for violation of this aspect. 1164 1165 No_Heap_Finalization_Pragma : Node_Id := Empty; 1166 -- GNAT 1167 -- Set to point to a No_Heap_Finalization pragma defined in a configuration 1168 -- file. 1169 1170 No_Main_Subprogram : Boolean := False; 1171 -- GNATMAKE, GNATBIND 1172 -- Set to True if compilation/binding of a program without main 1173 -- subprogram requested. 1174 1175 No_Run_Time_Mode : Boolean := False; 1176 -- GNAT, GNATBIND 1177 -- This flag is set True if a No_Run_Time pragma is encountered. See spec 1178 -- of Rtsfind for a full description of handling of this pragma. 1179 1180 No_Split_Units : Boolean := False; 1181 -- GPRBUILD 1182 -- Set to True with switch --no-split-units. When True, unit sources, spec, 1183 -- body and subunits, must all be in the same project. This is checked 1184 -- after each compilation. 1185 1186 No_Stdinc : Boolean := False; 1187 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF 1188 -- Set to True if no default source search dirs added to search list. 1189 1190 No_Stdlib : Boolean := False; 1191 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF 1192 -- Set to True if no default library search dirs added to search list. 1193 1194 No_Strict_Aliasing : Boolean := False; 1195 -- GNAT 1196 -- Set True if pragma No_Strict_Aliasing with no parameters encountered. 1197 1198 -- WARNING: There is a matching C declaration of this variable in fe.h 1199 1200 No_Tagged_Streams : Node_Id := Empty; 1201 -- GNAT 1202 -- If a pragma No_Tagged_Streams is active for the current scope, this 1203 -- points to the corresponding pragma. 1204 1205 Nodes_Size_In_Meg : Nat := 0; 1206 -- GNAT 1207 -- Amount of memory to allocate for all nodes, in units of 2**20 bytes. 1208 -- Set by the -gnaten switch; 0 means -gnaten was not given, and a default 1209 -- value should be used. 1210 1211 Normalize_Scalars : Boolean := False; 1212 -- GNAT, GNATBIND 1213 -- Set True if a pragma Normalize_Scalars applies to the current unit. 1214 -- Note that Init_Or_Norm_Scalars is also set to True if this is True. 1215 1216 Object_Directory_Present : Boolean := False; 1217 -- GNATMAKE 1218 -- Set to True when an object directory is specified with option -D 1219 1220 Object_Path_File_Name : String_Ptr := null; 1221 -- GNAT2WHY 1222 -- Path of the temporary file that contains a list of object directories 1223 -- passed by -gnateO=<obj_path_file>. 1224 1225 One_Compilation_Per_Obj_Dir : Boolean := False; 1226 -- GNATMAKE, GPRBUILD 1227 -- Set to True with switch --single-compile-per-obj-dir. When True, there 1228 -- cannot be simultaneous compilations with the object files in the same 1229 -- object directory, if project files are used. 1230 1231 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code); 1232 pragma Ordered (Operating_Mode_Type); 1233 Operating_Mode : Operating_Mode_Type := Generate_Code; 1234 -- GNAT 1235 -- Indicates the operating mode of the compiler. The default is generate 1236 -- code, which runs the parser, semantics and backend. Switches can be 1237 -- used to set syntax checking only mode, or syntax and semantics checking 1238 -- only mode. Operating_Mode can also be modified as a result of detecting 1239 -- errors during the compilation process. In particular if any serious 1240 -- error is detected then this flag is reset from Generate_Code to 1241 -- Check_Semantics after generating an error message. This is an ordered 1242 -- type with the semantics that each value does more than the previous one. 1243 1244 Optimize_Alignment : Character := 'O'; 1245 -- GNAT 1246 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can 1247 -- be modified by use of pragma Optimize_Alignment. 1248 1249 Optimize_Alignment_Local : Boolean := False; 1250 -- GNAT 1251 -- Set True if Optimize_Alignment mode is set by a local configuration 1252 -- pragma that overrides the gnat.adc (or other configuration file) default 1253 -- so that the unit is not dependent on the default setting. Also always 1254 -- set True for internal units, since these always have a default setting 1255 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to 1256 -- them all having such an explicit pragma in each unit). 1257 1258 Original_Operating_Mode : Operating_Mode_Type := Generate_Code; 1259 -- GNAT 1260 -- Indicates the original operating mode of the compiler as set by compiler 1261 -- options. This is identical to Operating_Mode except that this is not 1262 -- affected by errors. 1263 1264 Optimization_Level : Int; 1265 pragma Import (C, Optimization_Level, "optimize"); 1266 -- GNAT 1267 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3) 1268 1269 Optimize_Size : Int; 1270 pragma Import (C, Optimize_Size, "optimize_size"); 1271 -- GNAT 1272 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero 1273 -- in -Os mode and set to zero otherwise. 1274 1275 Output_File_Name_Present : Boolean := False; 1276 -- GNATBIND, GNAT, GNATMAKE 1277 -- Set to True when the output C file name is given with option -o for 1278 -- GNATBIND, when the object file name is given with option -gnatO for GNAT 1279 -- or when the executable is given with option -o for GNATMAKE. 1280 1281 Output_Linker_Option_List : Boolean := False; 1282 -- GNATBIND 1283 -- True if output of list of linker options is requested (-K switch set) 1284 1285 Output_ALI_List : Boolean := False; 1286 ALI_List_Filename : String_Ptr; 1287 -- GNATBIND 1288 -- True if output of list of ALIs is requested (-A switch set). List is 1289 -- output under the given filename, or standard output if not specified. 1290 1291 Output_Object_List : Boolean := False; 1292 Object_List_Filename : String_Ptr; 1293 -- GNATBIND 1294 -- True if output of list of objects is requested (-O switch set). List is 1295 -- output under the given filename, or standard output if not specified. 1296 1297 Partition_Elaboration_Policy : Character := ' '; 1298 -- GNAT, GNATBIND 1299 -- Set to ' ' for the default case (no elaboration policy specified). Reset 1300 -- to first character (uppercase) of locking policy name if a valid pragma 1301 -- Partition_Elaboration_Policy is encountered. 1302 1303 Partition_Elaboration_Policy_Sloc : Source_Ptr := No_Location; 1304 -- GNAT, GNATBIND 1305 -- Remember location of previous Partition_Elaboration_Policy pragma. This 1306 -- is used for inconsistency error messages. A value of System_Location is 1307 -- used if the policy is set in package System. 1308 1309 Persistent_BSS_Mode : Boolean := False; 1310 -- GNAT 1311 -- True if a Persistent_BSS configuration pragma is in effect, causing 1312 -- potentially persistent data to be placed in the persistent_bss section. 1313 1314 Pessimistic_Elab_Order : Boolean := False; 1315 -- GNATBIND 1316 -- True if pessimistic elaboration order is to be chosen (-p switch set) 1317 1318 Prefix_Exception_Messages : Boolean := False; 1319 -- GNAT 1320 -- Set True to prefix exception messages with entity-name: 1321 1322 Preprocessing_Data_File : String_Ptr := null; 1323 -- GNAT 1324 -- Set by switch -gnatep=. The file name of the preprocessing data file. 1325 1326 Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4); 1327 -- An extensible array to temporarily stores symbol definitions specified 1328 -- on the command line with -gnateD switches. The value 4 is an arbitrary 1329 -- starting point, if more space is needed it is allocated as required. 1330 1331 Preprocessing_Symbol_Last : Natural := 0; 1332 -- Index of last symbol definition in array Symbol_Definitions 1333 1334 Print_Generated_Code : Boolean := False; 1335 -- GNAT 1336 -- Set to True to enable output of generated code in source form. This 1337 -- flag is set by the -gnatG switch. 1338 1339 Print_Standard : Boolean := False; 1340 -- GNAT 1341 -- Set to true to enable printing of package standard in source form. 1342 -- This flag is set by the -gnatS switch 1343 1344 type Usage is (Unknown, Not_In_Use, In_Use); 1345 Project_File_In_Use : Usage := Unknown; 1346 -- GNAT 1347 -- Indicates if a project file is used or not. Set to In_Use by the first 1348 -- SFNP pragma. 1349 1350 Quantity_Of_Default_Size_Sec_Stacks : Int := -1; 1351 -- GNATBIND 1352 -- The number of default sized secondary stacks that the binder should 1353 -- generate. Allows ZFP users to have the binder generate extra stacks if 1354 -- needed to support multithreaded applications. A value of -1 indicates 1355 -- that no size was set by the binder. 1356 1357 Queuing_Policy : Character := ' '; 1358 -- GNAT, GNATBIND 1359 -- Set to ' ' for the default case (no queuing policy specified). Reset to 1360 -- first character (uppercase) of locking policy name if a valid 1361 -- Queuing_Policy pragma is encountered. 1362 1363 Queuing_Policy_Sloc : Source_Ptr := No_Location; 1364 -- GNAT, GNATBIND 1365 -- Remember location of previous Queuing_Policy pragma. This is used for 1366 -- inconsistency error messages. A value of System_Location is used if the 1367 -- policy is set in package System. 1368 1369 Quiet_Output : Boolean := False; 1370 -- GNATMAKE, GNATCLEAN, GPRBUILD, GPRCLEAN 1371 -- Set to True if the tool should not have any output if there are no 1372 -- errors or warnings. 1373 1374 Overriding_Renamings : Boolean := False; 1375 -- GNAT 1376 -- Set to True to enable compatibility mode with Rational compiler, and 1377 -- to accept renamings of implicit operations in their own scope. 1378 1379 Relaxed_Elaboration_Checks : Boolean := False; 1380 -- GNAT 1381 -- Set to True to ignore certain elaboration scenarios, thus making the 1382 -- current ABE mechanism more permissive. This behavior is applicable to 1383 -- both the default and the legacy ABE models. Modified by use of -gnatJ. 1384 1385 Relaxed_RM_Semantics : Boolean := False; 1386 -- GNAT 1387 -- Set to True to ignore some Ada semantic error to help parse legacy Ada 1388 -- code for use in e.g. static analysis (such as CodePeer). This deals 1389 -- with cases where other compilers allow illegal constructs. Tools such as 1390 -- CodePeer are interested in analyzing code rather than enforcing legality 1391 -- rules, so as long as these illegal constructs end up with code that can 1392 -- be handled by the tool in question, there is no reason to reject the 1393 -- code that is considered correct by the other compiler. 1394 1395 Replace_In_Comments : Boolean := False; 1396 -- GNATPREP 1397 -- Set to True if -C switch used. 1398 1399 RTS_Lib_Path_Name : String_Ptr := null; 1400 RTS_Src_Path_Name : String_Ptr := null; 1401 -- GNAT 1402 -- Set to the "adalib" and "adainclude" directories of the run time 1403 -- specified by --RTS=. 1404 1405 RTS_Switch : Boolean := False; 1406 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF 1407 -- Set to True when the --RTS switch is set 1408 1409 Run_Path_Option : Boolean := True; 1410 -- GNATMAKE, GNATLINK 1411 -- Set to False when no run_path_option should be issued to the linker 1412 1413 Search_Directory_Present : Boolean := False; 1414 -- GNAT 1415 -- Set to True when argument is -I. Reset to False when next argument, a 1416 -- search directory path is taken into account. Note that this is quite 1417 -- different from other switches in this section in that it is only set in 1418 -- a transitory manner as a result of scanning a -I switch with no file 1419 -- name, and if set, is an indication that the next argument is to be 1420 -- treated as a file name. 1421 1422 Sec_Stack_Used : Boolean := False; 1423 -- GNAT, GBATBIND 1424 -- Set True if generated code uses the System.Secondary_Stack package. For 1425 -- the binder, set if any unit uses the secondary stack package. 1426 1427 Setup_Projects : Boolean := False; 1428 -- GNAT DRIVER 1429 -- Set to True for GNAT SETUP: the Project Manager creates nonexistent 1430 -- object, library, and exec directories. 1431 1432 Shared_Libgnat : Boolean; 1433 -- GNATBIND 1434 -- Set to True if a shared libgnat is requested by using the -shared option 1435 -- for GNATBIND and to False when using the -static option. The value of 1436 -- this flag is set by Gnatbind.Scan_Bind_Arg. 1437 1438 Short_Circuit_And_Or : Boolean := False; 1439 -- GNAT 1440 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit. 1441 1442 type SPARK_Mode_Type is (None, Off, On); 1443 -- Possible legal modes that can be set by aspect/pragma SPARK_Mode, as 1444 -- well as the value None, which indicates no such pragma/aspect applies. 1445 1446 SPARK_Mode : SPARK_Mode_Type := None; 1447 -- GNAT 1448 -- Current SPARK mode setting. 1449 1450 SPARK_Mode_Pragma : Node_Id := Empty; 1451 -- GNAT 1452 -- If the current SPARK_Mode (above) was set by a pragma, this records 1453 -- the pragma that set this mode. 1454 1455 SPARK_Switches_File_Name : String_Ptr := null; 1456 -- GNAT 1457 -- Set to non-null file name by use of the -gnates switch to specify 1458 -- SPARK (gnat2why) specific switches in the given file name. 1459 1460 Special_Exception_Package_Used : Boolean := False; 1461 -- GNAT 1462 -- Set to True if either of the unit GNAT.Most_Recent_Exception or 1463 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of 1464 -- local raise statements into gotos in the presence of either package. 1465 1466 Sprint_Line_Limit : Nat := 72; 1467 -- GNAT 1468 -- Limit values for chopping long lines in Cprint/Sprint output, can be 1469 -- reset by use of NNN parameter with -gnatG or -gnatD switches. 1470 1471 Stack_Checking_Enabled : Boolean := False; 1472 -- GNAT 1473 -- Set to indicate if stack checking is enabled for the compilation. This 1474 -- is set directly from the value in the gcc back end in the body of the 1475 -- gcc version of back_end.adb. 1476 1477 Style_Check : Boolean := False; 1478 -- GNAT 1479 -- Set True to perform style checks. Activates checks carried out in 1480 -- package Style (see body of this package for details of checks). This 1481 -- flag is set True by use of either the -gnatg or -gnaty switches, or 1482 -- by the Style_Check pragma. 1483 1484 Style_Check_Main : Boolean := False; 1485 -- GNAT 1486 -- Set True if Style_Check was set for the main unit. This is used to 1487 -- enable style checks for units in the main extended source that get 1488 -- with'ed indirectly. It is set True by use of either the -gnatg or 1489 -- -gnaty switches, but not by use of the Style_Checks pragma. 1490 1491 Suppress_Control_Flow_Optimizations : Boolean := False; 1492 -- GNAT 1493 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations 1494 -- that interfere with coverage analysis based on the object code. 1495 1496 System_Extend_Pragma_Arg : Node_Id := Empty; 1497 -- GNAT 1498 -- Set non-empty if and only if a correct Extend_System pragma was present 1499 -- in which case it points to the argument of the pragma, and the name can 1500 -- be located as Chars (Expression (System_Extend_Pragma_Arg)). 1501 1502 System_Extend_Unit : Node_Id := Empty; 1503 -- GNAT 1504 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System 1505 -- is never appropriate in GNAT_Mode (and causes troubles, including 1506 -- bogus circularities, if we try to compile the run-time library with 1507 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit 1508 -- is a copy of the value set in System_Extend_Pragma_Arg. 1509 1510 Subunits_Missing : Boolean := False; 1511 -- GNAT 1512 -- This flag is set true if missing subunits are detected with code 1513 -- generation active. This causes code generation to be skipped. 1514 1515 Suppress_Checks : Boolean := False; 1516 -- GNAT 1517 -- Set to True if -gnatp (suppress all checks) switch present. 1518 1519 -- WARNING: There is a matching C declaration of this variable in fe.h 1520 1521 Suppress_Options : Suppress_Record; 1522 -- GNAT 1523 -- Indicates outer level setting of check suppression. This initializes 1524 -- the settings of the outer scope level in any unit compiled. This is 1525 -- initialized by Osint.Initialize, and further initialized by the 1526 -- Adjust_Global_Switches flag in Gnat1drv. 1527 1528 Table_Factor : Int := 1; 1529 -- GNAT 1530 -- Factor by which all initial table sizes set in Alloc are multiplied. 1531 -- Used in Table to calculate initial table sizes (the initial table size 1532 -- is the value in Alloc, used as the Table_Initial parameter value, 1533 -- multiplied by the factor given here. The default value is used if no 1534 -- -gnatT switch appears. 1535 1536 Tagged_Type_Expansion : Boolean := True; 1537 -- GNAT 1538 -- Set True if tagged types and interfaces should be expanded by the 1539 -- front-end. If False, the original tree is left unexpanded for tagged 1540 -- types and dispatching calls, assuming the underlying target supports it. 1541 1542 Target_Dependent_Info_Read_Name : String_Ptr := null; 1543 -- GNAT 1544 -- Set non-null to override the normal processing in Get_Targ and set the 1545 -- necessary information by reading the target dependent information file 1546 -- whose name is given here (see packages Get_Targ and Set_Targ for full 1547 -- details). Set to non-null file name by use of the -gnateT switch. 1548 1549 Target_Dependent_Info_Write_Name : String_Ptr := null; 1550 -- GNAT 1551 -- Set non-null to enable a call to Set_Targ.Write_Target_Dependent_Info 1552 -- which writes a target independent information file (see packages 1553 -- Get_Targ and Set_Targ for full details) using the name given by 1554 -- this switch. Set to non-null file name by use of the -gnatet switch. 1555 1556 type Origin_Of_Target is (Unknown, Default, Specified); 1557 1558 Target_Origin : Origin_Of_Target := Unknown; 1559 -- GPRBUILD 1560 -- Indicates the origin of attribute Target in project files 1561 1562 Target_Value : String_Access := null; 1563 -- GPRBUILD 1564 -- Indicates the value of attribute Target in project files 1565 1566 Task_Dispatching_Policy : Character := ' '; 1567 -- GNAT, GNATBIND 1568 -- Set to ' ' for the default case (no task dispatching policy specified). 1569 -- Reset to first character (uppercase) of task dispatching policy name 1570 -- if a valid Task_Dispatching_Policy pragma is encountered. 1571 1572 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location; 1573 -- GNAT, GNATBIND 1574 -- Remember location of previous Task_Dispatching_Policy pragma. This is 1575 -- used for inconsistency error messages. A value of System_Location is 1576 -- used if the policy is set in package System. 1577 1578 Tasking_Used : Boolean := False; 1579 -- Set True if any tasking construct is encountered. Used to activate the 1580 -- output of the Q, L and T lines in ALI files. 1581 1582 Time_Slice_Set : Boolean := False; 1583 -- GNATBIND 1584 -- Set True if a pragma Time_Slice is processed in the main unit, or 1585 -- if the -gnatTnn switch is present to set a time slice value. 1586 1587 Time_Slice_Value : Nat; 1588 -- GNATBIND 1589 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if 1590 -- Time_Slice pragma has been processed. Set to the time slice value in 1591 -- microseconds. Negative values are stored as zero, and the value is not 1592 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are 1593 -- reset to this maximum. This can also be set with the -gnatTnn switch. 1594 1595 Tolerate_Consistency_Errors : Boolean := False; 1596 -- GNATBIND 1597 -- Tolerate time stamp and other consistency errors. If this flag is set to 1598 -- True (-t), then inconsistencies result in warnings rather than errors. 1599 1600 Transform_Function_Array : Boolean := False; 1601 -- GNAT 1602 -- If this switch is set True, then functions returning constrained arrays 1603 -- are transformed into a procedure with an out parameter, and all calls 1604 -- are updated accordingly. 1605 1606 Treat_Categorization_Errors_As_Warnings : Boolean := False; 1607 -- Normally categorization errors are true illegalities. If this switch 1608 -- is set, then such errors result in warning messages rather than error 1609 -- messages. Set True by -gnateP (P for Pure/Preelaborate). Also set in 1610 -- Relaxed_RM_Semantics mode since some old Ada 83 compilers treated 1611 -- pragma Preelaborate differently. 1612 1613 Treat_Restrictions_As_Warnings : Boolean := False; 1614 -- GNAT 1615 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by 1616 -- -gnatr switch. 1617 1618 Try_Semantics : Boolean := False; 1619 -- GNAT 1620 -- Flag set to force attempt at semantic analysis, even if parser errors 1621 -- occur. This will probably cause blowups at this stage in the game. On 1622 -- the other hand, most such blowups will be caught cleanly and simply 1623 -- say compilation abandoned. This flag is set True by -gnatq or -gnatQ. 1624 1625 Unchecked_Shared_Lib_Imports : Boolean := False; 1626 -- GPRBUILD 1627 -- Set to True when shared library projects are allowed to import projects 1628 -- that are not shared library projects. Set on by use of the switch 1629 -- --unchecked-shared-lib-imports. 1630 1631 Undefined_Symbols_Are_False : Boolean := False; 1632 -- GNAT, GNATPREP 1633 -- Set to True by switch -u of gnatprep or -u in the preprocessing data 1634 -- file for the compiler. Indicates that while preprocessing sources, 1635 -- symbols that are not defined have the value FALSE. 1636 1637 Uneval_Old : Character := 'E'; 1638 -- GNAT 1639 -- Set to 'E'/'W'/'A' for use of Error/Warn/Allow in a valid pragma 1640 -- Unevaluated_Use_Of_Old. Default in the absence of the pragma is 'E' 1641 -- for the RM default behavior of giving an error. 1642 1643 Unique_Error_Tag : Boolean := Tag_Errors; 1644 -- GNAT 1645 -- Indicates if error messages are to be prefixed by the string error: 1646 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch. 1647 1648 Unnest_Subprogram_Mode : Boolean := False; 1649 -- If true, activates the circuitry for unnesting subprograms (see the spec 1650 -- of Exp_Unst for full details). Currently set only by use of -gnatd.1. 1651 1652 Unreserve_All_Interrupts : Boolean := False; 1653 -- GNAT, GNATBIND 1654 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma 1655 -- appears anywhere in the main unit for GNAT, or if any ALI file has the 1656 -- corresponding attribute set in GNATBIND. 1657 1658 Upper_Half_Encoding : Boolean := False; 1659 -- GNAT, GNATBIND 1660 -- Normally set False, indicating that upper half ISO 8859-1 characters are 1661 -- used in the normal way to represent themselves. If the wide character 1662 -- encoding method uses the upper bit for this encoding, then this flag is 1663 -- set True, and upper half characters in the source indicate the start of 1664 -- a wide character sequence. Set by -gnatW or -W switches. 1665 1666 Use_Include_Path_File : Boolean := False; 1667 -- GNATMAKE, GPRBUILD 1668 -- When True, create a source search path file, even when a mapping file 1669 -- is used. 1670 1671 Usage_Requested : Boolean := False; 1672 -- GNAT, GNATBIND, GNATMAKE 1673 -- Set to True if -h (-gnath for the compiler) switch encountered 1674 -- requesting usage information 1675 1676 Use_Pragma_Linker_Constructor : Boolean := False; 1677 -- GNATBIND 1678 -- True if pragma Linker_Constructor applies to adainit 1679 1680 Use_VADS_Size : Boolean := False; 1681 -- GNAT 1682 -- Set to True if a valid pragma Use_VADS_Size is processed 1683 1684 Validity_Checks_On : Boolean := True; 1685 -- GNAT 1686 -- This flag determines if validity checking is on or off. The initial 1687 -- state is on, and the required default validity checks are active. The 1688 -- actual set of checks that is performed if Validity_Checks_On is set is 1689 -- defined by the switches in package Validsw. The Validity_Checks_On flag 1690 -- is controlled by pragma Validity_Checks (On | Off), and also some 1691 -- generated compiler code (typically code that has to do with validity 1692 -- check generation) is compiled with this flag set to False. This flag is 1693 -- set to False by the -gnatp switch. 1694 1695 Verbose_Mode : Boolean := False; 1696 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN, 1697 -- GPRBUILD, GPRCLEAN 1698 -- Set to True to get verbose mode (full error message text and location 1699 -- information sent to standard output, also header, copyright and summary) 1700 1701 type Verbosity_Level_Type is (None, Low, Medium, High); 1702 pragma Ordered (Verbosity_Level_Type); 1703 Verbosity_Level : Verbosity_Level_Type := High; 1704 -- GNATMAKE 1705 -- Modified by gnatmake switches -v, -vl, -vm, -vh. Indicates 1706 -- the level of verbosity of informational messages: 1707 -- 1708 -- In Low Verbosity, the reasons why a source is recompiled, the name 1709 -- of the executable and the reason it must be rebuilt is output. 1710 -- 1711 -- In Medium Verbosity, additional lines are output for each ALI file 1712 -- that is checked. 1713 -- 1714 -- In High Verbosity, additional lines are output when the ALI file 1715 -- is part of an Ada library, is read-only or is part of the runtime. 1716 1717 Warn_On_Ada_2005_Compatibility : Boolean := True; 1718 -- GNAT 1719 -- Set to True to generate all warnings on Ada 2005 compatibility issues, 1720 -- including warnings on Ada 2005 obsolescent features used in Ada 2005 1721 -- mode. Set by default, modified by use of -gnatwy/Y. 1722 1723 Warn_On_Ada_2012_Compatibility : Boolean := True; 1724 -- GNAT 1725 -- Set to True to generate all warnings on Ada 2012 compatibility issues, 1726 -- including warnings on Ada 2012 obsolescent features used in Ada 2012 1727 -- mode. Modified by use of -gnatwy/Y. 1728 1729 Warn_On_Ada_202X_Compatibility : Boolean := True; 1730 -- GNAT 1731 -- Set to True to generate all warnings on Ada 202X compatibility issues, 1732 -- including warnings on Ada 202X obsolescent features used in Ada 202X 1733 -- mode. ???There is no warning switch for this yet. 1734 1735 Warn_On_All_Unread_Out_Parameters : Boolean := False; 1736 -- GNAT 1737 -- Set to True to generate warnings in all cases where a variable is 1738 -- modified by being passed as to an OUT formal, but the resulting value is 1739 -- never read. The default is that this warning is suppressed. Modified 1740 -- by use of gnatw.o/.O. 1741 1742 Warn_On_Assertion_Failure : Boolean := True; 1743 -- GNAT 1744 -- Set to True to activate warnings on assertions that can be determined 1745 -- at compile time will always fail. Modified by use of -gnatw.a/.A. 1746 1747 Warn_On_Assumed_Low_Bound : Boolean := True; 1748 -- GNAT 1749 -- Set to True to activate warnings for string parameters that are indexed 1750 -- with literals or S'Length, presumably assuming a lower bound of one. 1751 -- Modified by use of -gnatww/W. 1752 1753 Warn_On_Atomic_Synchronization : Boolean := False; 1754 -- GNAT 1755 -- Set to True to generate information messages for atomic synchronization. 1756 -- Modified by use of -gnatw.n/.N. 1757 1758 Warn_On_Bad_Fixed_Value : Boolean := False; 1759 -- GNAT 1760 -- Set to True to generate warnings for static fixed-point expression 1761 -- values that are not an exact multiple of the small value of the type. 1762 -- Odd by default, modified by use of -gnatwb/B. 1763 1764 Warn_On_Biased_Representation : Boolean := True; 1765 -- GNAT 1766 -- Set to True to generate warnings for size clauses, component clauses 1767 -- and component_size clauses that force biased representation. Modified 1768 -- by use of -gnatw.b/.B. 1769 1770 Warn_On_Constant : Boolean := False; 1771 -- GNAT 1772 -- Set to True to generate warnings for variables that could be declared 1773 -- as constants. Modified by use of -gnatwk/K. 1774 1775 Warn_On_Deleted_Code : Boolean := False; 1776 -- GNAT 1777 -- Set to True to generate warnings for code deleted by the front end 1778 -- for conditional statements whose outcome is known at compile time. 1779 -- Modified by use of -gnatwt/T. 1780 1781 Warn_On_Dereference : Boolean := False; 1782 -- GNAT 1783 -- Set to True to generate warnings for implicit dereferences for array 1784 -- indexing and record component access. Modified by use of -gnatwd/D. 1785 1786 Warn_On_Export_Import : Boolean := True; 1787 -- GNAT 1788 -- Set to True to generate warnings for suspicious use of export or 1789 -- import pragmas. Modified by use of -gnatwx/X. 1790 1791 Warn_On_Elab_Access : Boolean := False; 1792 -- GNAT 1793 -- Set to True to generate warnings for P'Access in the case where 1794 -- subprogram P is in the same package as the P'Access, and the P'Access is 1795 -- evaluated at package elaboration time, and occurs before the body of P 1796 -- has been elaborated. 1797 1798 Warn_On_Hiding : Boolean := False; 1799 -- GNAT 1800 -- Set to True to generate warnings if a declared entity hides another 1801 -- entity. The default is that this warning is suppressed. Modified by 1802 -- use of -gnatwh/H. 1803 1804 Warn_On_Modified_Unread : Boolean := False; 1805 -- GNAT 1806 -- Set to True to generate warnings if a variable is assigned but is never 1807 -- read. Also controls warnings for similar cases involving out parameters, 1808 -- but only if there is only one out parameter for the procedure involved. 1809 -- The default is that this warning is suppressed, modified by use of 1810 -- -gnatwm/M. 1811 1812 Warn_On_No_Value_Assigned : Boolean := True; 1813 -- GNAT 1814 -- Set to True to generate warnings if no value is ever assigned to a 1815 -- variable that is at least partially uninitialized. Set to false to 1816 -- suppress such warnings. The default is that such warnings are enabled. 1817 -- Modified by use of -gnatwv/V. 1818 1819 Warn_On_Non_Local_Exception : Boolean := False; 1820 -- GNAT 1821 -- Set to True to generate warnings for non-local exception raises and also 1822 -- handlers that can never handle a local raise. This warning is only ever 1823 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The 1824 -- default is not to generate the warnings except that if the source has 1825 -- at least one exception handler, and this restriction is set, and the 1826 -- warning was not explicitly turned off, then it is turned on by default. 1827 -- Modified by use of -gnatw.x/.X. 1828 1829 No_Warn_On_Non_Local_Exception : Boolean := False; 1830 -- GNAT 1831 -- This is set to True if the above warning is explicitly suppressed. We 1832 -- use this to avoid turning it on by default when No_Exception_Propagation 1833 -- restriction is set and an exception handler is present. 1834 1835 Warn_On_Object_Renames_Function : Boolean := False; 1836 -- GNAT 1837 -- Set to True to generate warnings when a function result is renamed as 1838 -- an object. The default is that this warning is disabled. Modified by 1839 -- use of -gnatw.r/.R. 1840 1841 Warn_On_Obsolescent_Feature : Boolean := False; 1842 -- GNAT 1843 -- Set to True to generate warnings on use of any feature in Annex or if a 1844 -- subprogram is called for which a pragma Obsolescent applies. Modified 1845 -- by use of -gnatwj/J. 1846 1847 Warn_On_Overlap : Boolean := False; 1848 -- GNAT 1849 -- Set to True to generate warnings when a writable actual overlaps with 1850 -- another actual in a subprogram call. This applies only in modes before 1851 -- Ada 2012. Starting with Ada 2012, such overlaps are illegal. 1852 -- Modified by use of -gnatw.i/.I. 1853 1854 Warn_On_Questionable_Missing_Parens : Boolean := True; 1855 -- GNAT 1856 -- Set to True to generate warnings for cases where parentheses are missing 1857 -- and the usage is questionable, because the intent is unclear. On by 1858 -- default, modified by use of -gnatwq/Q. 1859 1860 Warn_On_Parameter_Order : Boolean := False; 1861 -- GNAT 1862 -- Set to True to generate warnings for cases where the argument list for 1863 -- a call is a sequence of identifiers that match the formal identifiers, 1864 -- but are in the wrong order. 1865 1866 Warn_On_Redundant_Constructs : Boolean := False; 1867 -- GNAT 1868 -- Set to True to generate warnings for redundant constructs (e.g. useless 1869 -- assignments/conversions). The default is that this warning is disabled. 1870 -- Modified by use of -gnatwr/R. 1871 1872 Warn_On_Reverse_Bit_Order : Boolean := True; 1873 -- GNAT 1874 -- Set to True to generate warning (informational) messages for component 1875 -- clauses that are affected by non-standard bit-order. The default is 1876 -- that this warning is enabled. Modified by -gnatw.v/.V. 1877 1878 Warn_On_Suspicious_Contract : Boolean := True; 1879 -- GNAT 1880 -- Set to True to generate warnings for suspicious contracts expressed as 1881 -- pragmas or aspects precondition and postcondition, as well as other 1882 -- suspicious cases of expressions typically found in contracts like 1883 -- quantified expressions and uses of Update attribute. The default is that 1884 -- this warning is enabled. Modified by use of -gnatw.t/.T. 1885 1886 Warn_On_Suspicious_Modulus_Value : Boolean := True; 1887 -- GNAT 1888 -- Set to True to generate warnings for suspicious modulus values. The 1889 -- default is that this warning is enabled. Modified by -gnatw.m/.M. 1890 1891 Warn_On_Unchecked_Conversion : Boolean := True; 1892 -- GNAT 1893 -- Set to True to generate warnings for unchecked conversions that may have 1894 -- non-portable semantics (e.g. because sizes of types differ). Modified 1895 -- by use of -gnatwz/Z. 1896 1897 Warn_On_Unordered_Enumeration_Type : Boolean := False; 1898 -- GNAT 1899 -- Set to True to generate warnings for inappropriate uses (comparisons 1900 -- and explicit ranges) on unordered enumeration types (which includes 1901 -- all enumeration types for which pragma Ordered is not given). The 1902 -- default is that this warning is disabled. Modified by -gnat.u/.U. 1903 1904 Warn_On_Unrecognized_Pragma : Boolean := True; 1905 -- GNAT 1906 -- Set to True to generate warnings for unrecognized pragmas. The default 1907 -- is that this warning is enabled. Modified by use of -gnatwg/G. 1908 1909 Warn_On_Unrepped_Components : Boolean := False; 1910 -- GNAT 1911 -- Set to True to generate warnings for the case of components of record 1912 -- which have a record representation clause but this component does not 1913 -- have a component clause. Modified by use of -gnatw.c/.C. 1914 1915 Warn_On_Warnings_Off : Boolean := False; 1916 -- GNAT 1917 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent), 1918 -- where either the pragma is never used, or it could be replaced by a 1919 -- pragma Unmodified or Unreferenced. Also generates warnings for pragma 1920 -- Warning (Off, string) which either has no matching pragma Warning On, 1921 -- or where no warning has been suppressed by the use of the pragma. 1922 -- Modified by use of -gnatw.w/.W. 1923 1924 type Warning_Mode_Type is 1925 (Suppress, Normal, Treat_As_Error, Treat_Run_Time_Warnings_As_Errors); 1926 Warning_Mode : Warning_Mode_Type := Normal; 1927 -- GNAT, GNATBIND 1928 -- Controls treatment of warning messages. If set to Suppress, warning 1929 -- messages are not generated at all. In Normal mode, they are generated 1930 -- but do not count as errors. In Treat_As_Error mode, warning messages are 1931 -- generated and treated as errors, except for warnings emitted by the 1932 -- Compile_Time_Warning pragma. In Treat_Run_Time_Warnings_As_Errors, 1933 -- warning messages regarding errors raised at run time are treated as 1934 -- errors. Note that Warning_Mode = Suppress causes pragma Warnings to be 1935 -- ignored (except for legality checks), unless we are in GNATprove_Mode, 1936 -- which requires pragma Warnings to be stored for the formal verification 1937 -- backend. 1938 1939 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets; 1940 -- GNAT, GNATBIND 1941 -- Method used for encoding wide characters in the source program. See 1942 -- description of type in unit System.WCh_Con for a list of the methods 1943 -- that are currently supported. Note that brackets notation is always 1944 -- recognized in source programs regardless of the setting of this 1945 -- variable. The default setting causes only the brackets notation to be 1946 -- recognized. If this is the main unit, this setting also controls the 1947 -- output of the W=? parameter in the ALI file, which is used to provide 1948 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder, 1949 -- the value set here overrides this main unit default. 1950 1951 Wide_Character_Encoding_Method_Specified : Boolean := False; 1952 -- GNAT, GNATBIND 1953 -- Set True if the value in Wide_Character_Encoding_Method was set as 1954 -- a result of an explicit -gnatW? or -W? switch. False otherwise. 1955 1956 Xref_Active : Boolean := True; 1957 -- GNAT 1958 -- Set if cross-referencing is enabled (i.e. xref info in ALI files) 1959 1960 Zero_Formatting : Boolean := False; 1961 -- GNATBIND 1962 -- Do no formatting (no title, no leading spaces, no empty lines) in 1963 -- auxiliary outputs (-e, -K, -l, -R). 1964 1965 ---------------------------- 1966 -- Configuration Settings -- 1967 ---------------------------- 1968 1969 -- These are settings that are used to establish the mode at the start of 1970 -- each unit. The values defined below can be affected either by command 1971 -- line switches, or by the use of appropriate configuration pragmas in a 1972 -- configuration pragma file (but NOT by a local use of a configuration 1973 -- pragma in a single file). 1974 1975 Ada_Version_Config : Ada_Version_Type; 1976 -- GNAT 1977 -- This is the value of the configuration switch for the Ada 83 mode, as 1978 -- set by the command line switches -gnat83/95/2005/2012, and possibly 1979 -- modified by the use of configuration pragmas Ada_*. This switch is used 1980 -- to set the initial value for Ada_Version mode at the start of analysis 1981 -- of a unit. Note however that the setting of this flag is ignored for 1982 -- internal and predefined units (which are always compiled in the most up 1983 -- to date version of Ada). 1984 1985 Ada_Version_Pragma_Config : Node_Id; 1986 -- This will be set nonempty if it is set by a configuration pragma 1987 1988 Ada_Version_Explicit_Config : Ada_Version_Type; 1989 -- GNAT 1990 -- This is set in the same manner as Ada_Version_Config. The difference is 1991 -- that the setting of this flag is not ignored for internal and predefined 1992 -- units, which for some purposes do indeed access this value, regardless 1993 -- of the fact that they are compiled the most up to date ada version). 1994 1995 Assertions_Enabled_Config : Boolean; 1996 -- GNAT 1997 -- This is the value of the configuration switch for assertions enabled 1998 -- mode, as possibly set by the command line switch -gnata, and possibly 1999 -- modified by the use of the configuration pragma Assertion_Policy. 2000 2001 Assume_No_Invalid_Values_Config : Boolean; 2002 -- GNAT 2003 -- This is the value of the configuration switch for assuming "no invalid 2004 -- values enabled" mode, as possibly set by the command line switch 2005 -- -gnatB, and possibly modified by the use of the configuration pragma 2006 -- Assume_No_Invalid_Values. 2007 2008 Check_Float_Overflow_Config : Boolean; 2009 -- GNAT 2010 -- Set to True to check that operations on predefined unconstrained float 2011 -- types (e.g. Float, Long_Float) do not overflow and generate infinities 2012 -- or invalid values. Set by the Check_Float_Overflow pragma, or by use 2013 -- of the -gnateF switch. 2014 2015 Check_Policy_List_Config : Node_Id; 2016 -- GNAT 2017 -- This points to the list of N_Pragma nodes for Check_Policy pragmas 2018 -- that are linked through the Next_Pragma fields, with the list being 2019 -- terminated by Empty. The order is most recently processed first. This 2020 -- list includes only those pragmas in configuration pragma files. 2021 2022 Default_Pool_Config : Node_Id := Empty; 2023 -- GNAT 2024 -- Same as Default_Pool above, except this is only for Default_Storage_Pool 2025 -- pragmas that are configuration pragmas. 2026 2027 Default_SSO_Config : Character := ' '; 2028 -- GNAT 2029 -- Set if a pragma Default_Scalar_Storage_Order appears as a configuration 2030 -- pragma. A value of ' ' means that no pragma was given, otherwise the 2031 -- value is 'H' for High_Order_First or 'L' for Low_Order_First. 2032 2033 Dynamic_Elaboration_Checks_Config : Boolean := False; 2034 -- GNAT 2035 -- Set True for dynamic elaboration checking mode, as set by the -gnatE 2036 -- switch or by the use of pragma Elaboration_Checking (Dynamic). 2037 2038 Exception_Locations_Suppressed_Config : Boolean := False; 2039 -- GNAT 2040 -- Set True by use of the configuration pragma Suppress_Exception_Messages 2041 2042 Extensions_Allowed_Config : Boolean; 2043 -- GNAT 2044 -- This is the flag that indicates whether extensions are allowed. It can 2045 -- be set True either by use of the -gnatX switch, or by use of the 2046 -- configuration pragma Extensions_Allowed (On). It is always set to True 2047 -- for internal GNAT units, since extensions are always permitted in such 2048 -- units. 2049 2050 External_Name_Exp_Casing_Config : External_Casing_Type; 2051 -- GNAT 2052 -- This is the value of the configuration switch that controls casing of 2053 -- external symbols for which an explicit external name is given. It can be 2054 -- set to Uppercase by the command line switch -gnatF, and further modified 2055 -- by the use of the configuration pragma External_Name_Casing in the 2056 -- gnat.adc file. This flag is used to set the initial value for 2057 -- External_Name_Exp_Casing at the start of analyzing each unit. Note 2058 -- however that the setting of this flag is ignored for internal and 2059 -- predefined units (which are always compiled with As_Is mode). 2060 2061 External_Name_Imp_Casing_Config : External_Casing_Type; 2062 -- GNAT 2063 -- This is the value of the configuration switch that controls casing of 2064 -- external symbols where the external name is implicitly given. It can be 2065 -- set to Uppercase by the command line switch -gnatF, and further modified 2066 -- by the use of the configuration pragma External_Name_Casing in the 2067 -- gnat.adc file. This flag is used to set the initial value for 2068 -- External_Name_Imp_Casing at the start of analyzing each unit. Note 2069 -- however that the setting of this flag is ignored for internal and 2070 -- predefined units (which are always compiled with Lowercase mode). 2071 2072 Fast_Math_Config : Boolean; 2073 -- GNAT 2074 -- This is the value of the configuration switch that controls Fast_Math 2075 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is 2076 -- used to set the initial value of Fast_Math at the start of each new 2077 -- compilation unit. 2078 2079 Initialize_Scalars_Config : Boolean; 2080 -- GNAT 2081 -- This is the value of the configuration switch that is set by the 2082 -- pragma Initialize_Scalars when it appears in the gnat.adc file. 2083 -- This switch is not set when the pragma appears ahead of a given 2084 -- unit, so it does not affect the compilation of other units. 2085 2086 No_Component_Reordering_Config : Boolean; 2087 -- GNAT 2088 -- This is the value of the configuration switch that is set by the 2089 -- pragma No_Component_Reordering when it appears in the gnat.adc file. 2090 -- This flag is used to set the initial value of No_Component_Reordering 2091 -- at the start of each compilation unit, except that it is always set 2092 -- False for predefined units. 2093 2094 No_Exit_Message : Boolean := False; 2095 -- GNATMAKE, GPRBUILD 2096 -- Set with switch --no-exit-message. When True, if there are compilation 2097 -- failures, the builder does not issue an exit error message. 2098 2099 Optimize_Alignment_Config : Character; 2100 -- GNAT 2101 -- This is the value of the configuration switch that controls the 2102 -- alignment optimization mode, as set by an Optimize_Alignment pragma. 2103 -- It is used to set the initial value of Optimize_Alignment at the start 2104 -- of each new compilation unit, except that it is always set to 'O' (off) 2105 -- for internal units. 2106 2107 Persistent_BSS_Mode_Config : Boolean; 2108 -- GNAT 2109 -- This is the value of the configuration switch that controls whether 2110 -- potentially persistent data is to be placed in the persistent_bss 2111 -- section. It can be set True by use of the pragma Persistent_BSS. 2112 -- This flag is used to set the initial value of Persistent_BSS_Mode 2113 -- at the start of each compilation unit, except that it is always 2114 -- set False for predefined units. 2115 2116 Prefix_Exception_Messages_Config : Boolean; 2117 -- The setting of Prefix_Exception_Messages from configuration pragmas 2118 2119 SPARK_Mode_Config : SPARK_Mode_Type := None; 2120 -- GNAT 2121 -- The setting of SPARK_Mode from configuration pragmas 2122 2123 SPARK_Mode_Pragma_Config : Node_Id := Empty; 2124 -- If a SPARK_Mode pragma appeared in the configuration pragmas (setting 2125 -- SPARK_Mode_Config appropriately), then this points to the N_Pragma node. 2126 2127 Uneval_Old_Config : Character; 2128 -- GNAT 2129 -- The setting of Uneval_Old from configuration pragmas 2130 2131 Use_VADS_Size_Config : Boolean; 2132 -- GNAT 2133 -- This is the value of the configuration switch that controls the use of 2134 -- VADS_Size instead of Size wherever the attribute Size is used. It can 2135 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file. 2136 -- This flag is used to set the initial value for Use_VADS_Size at the 2137 -- start of analyzing each unit. Note however that the setting of this flag 2138 -- is ignored for internal and predefined units (which are always compiled 2139 -- with the standard Size semantics). 2140 2141 type Config_Switches_Type is private; 2142 -- Type used to save values of the switches set from Config values 2143 2144 procedure Register_Config_Switches; 2145 -- This procedure is called after processing the gnat.adc file and other 2146 -- configuration pragma files to record the values of the Config switches, 2147 -- as possibly modified by the use of command line switches and pragmas 2148 -- appearing in these files. 2149 2150 procedure Restore_Config_Switches (Save : Config_Switches_Type); 2151 -- This procedure restores a set of switch values previously saved by a 2152 -- call to Save_Config_Switches. 2153 2154 function Save_Config_Switches return Config_Switches_Type; 2155 -- Return the current state of all configuration-related attributes 2156 2157 procedure Set_Config_Switches 2158 (Internal_Unit : Boolean; 2159 Main_Unit : Boolean); 2160 -- This procedure sets the switches to the appropriate initial values. The 2161 -- parameter Internal_Unit is True for an internal or predefined unit, and 2162 -- affects the way the switches are set (see above). Main_Unit is true if 2163 -- switches are being set for the main unit or for the spec of the main 2164 -- unit. This affects setting of the assert/debug pragma switches, which 2165 -- are normally set false by default for an internal unit, except when the 2166 -- internal unit is the main unit, in which case we use the command line 2167 -- settings. 2168 2169 ------------------------ 2170 -- Other Global Flags -- 2171 ------------------------ 2172 2173 Building_Static_Dispatch_Tables : Boolean := True; 2174 -- This flag indicates if the backend supports generation of statically 2175 -- allocated dispatch tables. If it is True, then the front end will 2176 -- generate static aggregates for dispatch tables that contain forward 2177 -- references to addresses of subprograms not seen yet, and the back end 2178 -- must be prepared to handle this case. If it is False, then the front end 2179 -- generates assignments to initialize the dispatch table, and there are 2180 -- no such forward references. By default we build statically allocated 2181 -- dispatch tables for all library-level tagged types in all platforms. 2182 -- This behavior can be disabled using switch -gnatd.t which will set 2183 -- this flag to False and revert to the previous dynamic behavior. 2184 2185 Expander_Active : Boolean := False; 2186 -- A flag that indicates if expansion is active (True) or deactivated 2187 -- (False). When expansion is deactivated all calls to expander routines 2188 -- have no effect. Note that the initial setting of False is merely to 2189 -- prevent saving of an undefined value for an initial call to the 2190 -- Expander_Mode_Save_And_Set procedure. For more information on the use of 2191 -- this flag, see package Expander. Indeed this flag might more logically 2192 -- be in the spec of Expander, but it is referenced by Errout, and it 2193 -- really seems wrong for Errout to depend on Expander. 2194 2195 Tagged_Seen : Boolean := False; 2196 -- Set True by the parser if the "tagged" reserved word is seen. This is 2197 -- needed in Exp_Put_Image (see that package for documentation). 2198 2199 ----------------------------------- 2200 -- Modes for Formal Verification -- 2201 ----------------------------------- 2202 2203 GNATprove_Mode : Boolean := False; 2204 -- Specific compiling mode targeting formal verification for those parts 2205 -- of the input code that belong to the SPARK 2014 subset of Ada. Set True 2206 -- by the gnat2why executable or by use of the -gnatd.F debug switch. Note 2207 -- that this is completely separate from the SPARK restriction defined in 2208 -- GNAT to detect violations of a subset of SPARK 2005 rules. 2209 2210 --------------------------- 2211 -- Error/Warning Control -- 2212 --------------------------- 2213 2214 -- The following array would more reasonably be located in Err_Vars or 2215 -- Errout, but we put them here to deal with licensing issues (we need 2216 -- this to have the GPL exception licensing, since these variables and 2217 -- subprograms are accessed from units with this licensing). 2218 2219 Warnings_As_Errors : array (1 .. 10_000) of String_Ptr; 2220 -- Table for recording Warning_As_Error pragmas as they are processed. It 2221 -- would be nicer to use Table, but there are circular elaboration problems 2222 -- if we try to do this, and an attempt to find some other appropriately 2223 -- licensed unit to declare this as a Table failed with various elaboration 2224 -- circularities. 2225 2226 Warnings_As_Errors_Count : Natural; 2227 -- GNAT 2228 -- Number of entries stored in Warnings_As_Errors table 2229 2230 Warnings_As_Errors_Count_Config : Natural; 2231 -- GNAT 2232 -- Count of pattern strings stored from Warning_As_Error pragmas 2233 2234 --------------- 2235 -- GNAT_Mode -- 2236 --------------- 2237 2238 GNAT_Mode : Boolean := False; 2239 -- GNAT 2240 -- True if compiling in GNAT system mode (-gnatg switch) 2241 2242 -- WARNING: There is a matching C declaration of this variable in fe.h 2243 2244 GNAT_Mode_Config : Boolean := False; 2245 -- GNAT 2246 -- True if -gnatg switch is present. GNAT_Mode may be temporary set to 2247 -- True during the analysis of a system unit, but GNAT_Mode_Config must 2248 -- not change once scanned and set. 2249 2250 -- Setting GNAT mode has the following effects on the language that is 2251 -- accepted. Note that several of the following have the effect of changing 2252 -- an error to a warning. But warnings are usually treated as fatal errors 2253 -- in -gnatg mode, so to actually take advantage of such a change, it is 2254 -- necessary to add an explicit pragma Warnings (Off) in the source and 2255 -- this requires clear documentation of why this is necessary. 2256 2257 -- The identifier character set is set to 'n' (7-bit ASCII) 2258 2259 -- Pragma Extend_System is ignored 2260 2261 -- Warning_Mode is set to Treat_As_Error (-gnatwe) 2262 2263 -- Standard style checks are set (See Set_GNAT_Style_Check_Options) 2264 2265 -- Standard warnings are turned on (see Set_GNAT_Mode_Warnings) 2266 2267 -- The Ada version is set to Ada 2012 2268 2269 -- Task priorities are always allowed to be in the range Any_Priority 2270 2271 -- Overflow checks are suppressed, overflow checking set to strict mode 2272 2273 -- ALI files are always generated for predefined generic packages 2274 2275 -- Obsolescent feature warnings are suppressed 2276 2277 -- Recompilation of children of GNAT, System, Ada, Interfaces is allowed 2278 2279 -- The Scalar_Storage_Order attribute applies to generic types 2280 2281 -- Categorization errors are treated as warnings rather than errors 2282 2283 -- Statements in preelaborated units give warnings rather than errors 2284 2285 -- Private objects are allowed in preelaborated units 2286 2287 -- Non-static constants in preelaborated units give warnings not errors 2288 2289 -- The warning about component size being ignored is suppressed 2290 2291 -- The warning about size clauses being ignored is suppressed 2292 2293 -- Initializing limited types gives a warning rather than an error 2294 2295 -- Copying of limited objects is allowed 2296 2297 -- Returning objects of limited types is allowed 2298 2299 -- Non-static call in preelaborated unit give a warning, not an error 2300 2301 -- Warnings on possible elaboration errors are suppressed 2302 2303 -- Warnings about packing being ignored are suppressed 2304 2305 -- Warnings in internal units are not suppressed (they normally are) 2306 2307 -- The only special comment sequence allowed is --! 2308 2309 -------------------------- 2310 -- Private Declarations -- 2311 -------------------------- 2312 2313private 2314 -- The following type is used to save and restore settings of switches in 2315 -- Opt that represent the configuration (i.e. result of config pragmas). 2316 2317 -- Note that Ada_Version_Explicit is not included, since this is a sticky 2318 -- flag that once set does not get reset, since the whole idea of this flag 2319 -- is to record the setting for the main unit. 2320 2321 type Config_Switches_Type is record 2322 Ada_Version : Ada_Version_Type; 2323 Ada_Version_Explicit : Ada_Version_Type; 2324 Ada_Version_Pragma : Node_Id; 2325 Assertions_Enabled : Boolean; 2326 Assume_No_Invalid_Values : Boolean; 2327 Check_Float_Overflow : Boolean; 2328 Check_Policy_List : Node_Id; 2329 Default_Pool : Node_Id; 2330 Default_SSO : Character; 2331 Dynamic_Elaboration_Checks : Boolean; 2332 Exception_Locations_Suppressed : Boolean; 2333 Extensions_Allowed : Boolean; 2334 External_Name_Exp_Casing : External_Casing_Type; 2335 External_Name_Imp_Casing : External_Casing_Type; 2336 Fast_Math : Boolean; 2337 Initialize_Scalars : Boolean; 2338 No_Component_Reordering : Boolean; 2339 Normalize_Scalars : Boolean; 2340 Optimize_Alignment : Character; 2341 Optimize_Alignment_Local : Boolean; 2342 Persistent_BSS_Mode : Boolean; 2343 Prefix_Exception_Messages : Boolean; 2344 SPARK_Mode : SPARK_Mode_Type; 2345 SPARK_Mode_Pragma : Node_Id; 2346 Uneval_Old : Character; 2347 Use_VADS_Size : Boolean; 2348 Warnings_As_Errors_Count : Natural; 2349 end record; 2350 2351 -- The following declarations are for GCC version dependent flags. We do 2352 -- not let client code in the compiler test GCC_Version directly, but 2353 -- instead use deferred constants for relevant feature tags. 2354 2355 -- Note: there currently are no such constants defined in this section, 2356 -- since the compiler front end is currently entirely independent of the 2357 -- GCC version, which is a desirable state of affairs. 2358 2359 function get_gcc_version return Int; 2360 pragma Import (C, get_gcc_version, "get_gcc_version"); 2361 2362 GCC_Version : constant Nat := get_gcc_version; 2363 -- GNATMAKE 2364 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that 2365 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported. 2366 2367end Opt; 2368