1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2011, Free Software Foundation, Inc. --
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. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 -- This package contains global flags set by the initialization routine from
33 -- the command line and referenced throughout the compiler, the binder, or
34 -- other GNAT tools. The comments indicate which options are used by which
35 -- programs (GNAT, GNATBIND, GNATLINK, GNATMAKE, GPRMAKE, etc).
37 -- Some flags are labelled "PROJECT MANAGER". These are used by tools that
38 -- use the Project Manager. These tools include gnatmake, gnatname, the gnat
39 -- driver, gnatclean, gprbuild and gprclean.
41 with Hostparm; use Hostparm;
42 with Types; use Types;
44 pragma Warnings (Off);
45 -- This package is used also by gnatcoll
46 with System.Strings; use System.Strings;
47 with System.WCh_Con; use System.WCh_Con;
52 ----------------------
53 -- Checksum Control --
54 ----------------------
56 -- Checksums are computed for sources to check for sources being the same
57 -- from a compilation point of view (e.g. spelling of identifiers and
58 -- white space layout do not count in this computation).
60 -- The way the checksum is computed has evolved across the various versions
61 -- of GNAT. When gprbuild is called with -m, the checksums must be computed
62 -- the same way in gprbuild as it was in the GNAT version of the compiler.
63 -- The different ways are
65 -- Version 6.4 and later:
67 -- The Accumulate_Token_Checksum procedure is called after each numeric
68 -- literal and each identifier/keyword. For keywords, Tok_Identifier is
69 -- used in the call to Accumulate_Token_Checksum.
71 -- Versions 5.04 to 6.3:
73 -- For keywords, the token value were used in the call to procedure
74 -- Accumulate_Token_Checksum. Type Token_Type did not include Tok_Some.
78 -- For keywords, the token value were used in the call to
79 -- Accumulate_Token_Checksum. Type Token_Type did not include
80 -- Tok_Interface, Tok_Overriding, Tok_Synchronized and Tok_Some.
82 -- Versions 5.02 and before:
84 -- No calls to procedure Accumulate_Token_Checksum (the checksum
85 -- mechanism was introduced in version 5.03).
87 -- To signal to the scanner whether Accumulate_Token_Checksum needs to be
88 -- called and what versions to call, the following Boolean flags are used:
90 Checksum_Accumulate_Token_Checksum : Boolean := True;
92 -- Set to False by gprbuild when the version of GNAT is 5.02 or before. If
93 -- this switch is False, then we do not call Accumulate_Token_Checksum, so
94 -- the setting of the following two flags is irrelevant.
96 Checksum_GNAT_6_3 : Boolean := False;
98 -- Set to True by gprbuild when the version of GNAT is 6.3 or before.
100 Checksum_GNAT_5_03 : Boolean := False;
102 -- Set to True by gprbuild when the version of GNAT is 5.03 or before.
104 ----------------------------------------------
105 -- Settings of Modes for Current Processing --
106 ----------------------------------------------
108 -- The following mode values represent the current state of processing.
109 -- The values set here are the default values. Unless otherwise noted,
110 -- the value may be reset in Switch-? with an appropriate switch. In
111 -- some cases, the values can also be modified by pragmas, and in the
112 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
113 -- the default values.
115 type Ada_Version_Type is (Ada_83, Ada_95, Ada_2005, Ada_2012);
116 pragma Ordered (Ada_Version_Type);
117 -- Versions of Ada for Ada_Version below. Note that these are ordered,
118 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
119 -- Think twice before using "="; Ada_Version >= Ada_2012 is more likely
120 -- what you want, because it will apply to future versions of the language.
122 Ada_Version_Default : constant Ada_Version_Type := Ada_2005;
123 pragma Warnings (Off, Ada_Version_Default);
125 -- Default Ada version if no switch given. The Warnings off is to kill
126 -- constant condition warnings.
128 -- WARNING: some scripts rely on the format of this line of code. Any
129 -- change must be coordinated with the scripts requirements.
131 Ada_Version : Ada_Version_Type := Ada_Version_Default;
133 -- Current Ada version for compiler, as set by configuration pragmas,
134 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
135 -- predefined or internal file is compiled.
137 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
139 -- Like Ada_Version, but does not get set implicitly for predefined
140 -- or internal units, so it reflects the Ada version explicitly set
141 -- using configuration pragmas or compiler switches (or if neither
142 -- appears, it remains set to Ada_Version_Default). This is used in
143 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
144 -- where in the run-time we want the explicit version set.
146 Ada_Version_Runtime : Ada_Version_Type := Ada_2012;
148 -- Ada version used to compile the runtime. Used to set Ada_Version (but
149 -- not Ada_Version_Explicit) when compiling predefined or internal units.
151 Ada_Final_Suffix : constant String := "final";
152 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
154 -- The name of the procedure that performs the finalization at the end of
155 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
157 Ada_Init_Suffix : constant String := "init";
158 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
160 -- The name of the procedure that performs initialization at the start
161 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
163 Ada_Main_Name_Suffix : constant String := "main";
165 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
166 -- can be referenced in a uniform manner to create either the default
167 -- value of Ada_Main_Name (declared below), or the non-default name
168 -- set by Gnatbind.Scan_Bind_Arg.
170 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
172 -- The name of the Ada package generated by the binder (when in Ada mode).
173 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
175 Address_Clause_Overlay_Warnings : Boolean := True;
177 -- Set False to disable address clause warnings
179 Address_Is_Private : Boolean := False;
181 -- Set True if package System has the line "type Address is private;"
183 All_Errors_Mode : Boolean := False;
185 -- Flag set to force display of multiple errors on a single line and
186 -- also repeated error messages for references to undefined identifiers
187 -- and certain other repeated error messages. Set by use of -gnatf.
189 All_Sources : Boolean := False;
191 -- Set to True to require all source files to be present. This flag is
192 -- directly modified by gnatmake to affect the shared binder routines.
194 Alternate_Main_Name : String_Ptr := null;
196 -- Set to non null when Bind_Alternate_Main_Name is True. This value
197 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
199 ASIS_Mode : Boolean := False;
201 -- Enable semantic checks and tree transformations that are important
202 -- for ASIS but that are usually skipped if Operating_Mode is set to
203 -- Check_Semantics. This flag does not have the corresponding option to set
204 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
205 -- from the code of GNSA-based tool (a client may need to set ON the
206 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
207 -- make very much sense, because GNSA cannot do back annotation).
209 Assertions_Enabled : Boolean := False;
211 -- Enable assertions made using pragma Assert
213 Assume_No_Invalid_Values : Boolean := False;
215 -- Normally, in accordance with (RM 13.9.1 (9-11)) the front end assumes
216 -- that values could have invalid representations, unless it can clearly
217 -- prove that the values are valid. If this switch is set (by -gnatB or by
218 -- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values
219 -- are valid and in range of their representations. This feature is now
220 -- fully enabled in the compiler.
222 Back_Annotate_Rep_Info : Boolean := False;
224 -- If set True, enables back annotation of representation information
225 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
226 -- (list representation information) or -gnatt (generate tree). It is
227 -- also set true if certain Unchecked_Conversion instantiations require
228 -- checking based on annotated values.
230 Back_End_Handles_Limited_Types : Boolean;
231 -- This flag is set true if the back end can properly handle limited or
232 -- other by reference types, and avoid copies. If this flag is False, then
233 -- the front end does special expansion for conditional expressions to make
234 -- sure that no copy occurs. If the flag is True, then the expansion for
235 -- conditional expressions relies on the back end properly handling things.
236 -- Currently the default is False for all cases (set in gnat1drv). The
237 -- default can be modified using -gnatd.L (sets the flag True).
239 Bind_Alternate_Main_Name : Boolean := False;
241 -- True if main should be called Alternate_Main_Name.all.
242 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
244 Bind_Main_Program : Boolean := True;
246 -- Set to False if not binding main Ada program
248 Bind_For_Library : Boolean := False;
250 -- Set to True if the binder needs to generate a file designed for building
251 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg.
253 Bind_Only : Boolean := False;
254 -- GNATMAKE, GPRMAKE, GPRBUILD
255 -- Set to True to skip compile and link steps
256 -- (except when Compile_Only and/or Link_Only are True).
258 Blank_Deleted_Lines : Boolean := False;
260 -- Output empty lines for each line of preprocessed input that is deleted
261 -- in the output, including preprocessor lines starting with a '#'.
263 Brief_Output : Boolean := False;
265 -- Force brief error messages to standard error, even if verbose mode is
266 -- set (so that main error messages go to standard output).
268 Build_Bind_And_Link_Full_Project : Boolean := False;
270 -- Set to True to build, bind and link all the sources of a project file
273 Check_Object_Consistency : Boolean := False;
274 -- GNATBIND, GNATMAKE
275 -- Set to True to check whether every object file is consistent with
276 -- its corresponding ada library information (ALI) file. An object
277 -- file is inconsistent with the corresponding ALI file if the object
278 -- file does not exist or if it has an older time stamp than the ALI file.
279 -- Default above is for GNATBIND. GNATMAKE overrides this default to
280 -- True (see Make.Initialize) since we normally do need to check source
281 -- consistencies in gnatmake.
283 Check_Only : Boolean := False;
285 -- Set to True to do checks only, no output of binder file
287 Check_Policy_List : Node_Id := Empty;
289 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
290 -- that are linked through the Next_Pragma fields, with the list being
291 -- terminated by Empty. The order is most recently processed first. Note
292 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value
293 -- of this variable, implementing the required scope control for pragmas
294 -- appearing a declarative part.
296 Check_Readonly_Files : Boolean := False;
298 -- Set to True to check readonly files during the make process
300 Check_Source_Files : Boolean := True;
301 -- GNATBIND, GNATMAKE
302 -- Set to True to enable consistency checking for any source files that
303 -- are present (i.e. date must match the date in the library info file).
304 -- Set to False for object file consistency check only. This flag is
305 -- directly modified by gnatmake, to affect the shared binder routines.
307 Check_Switches : Boolean := False;
308 -- GNATMAKE, GPRMAKE, GPBUILD
309 -- Set to True to check compiler options during the make process
311 Check_Unreferenced : Boolean := False;
313 -- Set to True to enable checking for unreferenced entities other
314 -- than formal parameters (for which see Check_Unreferenced_Formals)
316 Check_Unreferenced_Formals : Boolean := False;
318 -- Set True to check for unreferenced formals. This is turned on by
319 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
321 Check_Withs : Boolean := False;
323 -- Set to True to enable checking for unused withs, and also the case
324 -- of withing a package and using none of the entities in the package.
326 CodePeer_Mode : Boolean := False;
328 -- Enable full CodePeer mode (SCIL generation, disable switches that
329 -- interact badly with it, etc...).
331 Commands_To_Stdout : Boolean := False;
333 -- True if echoed commands to be written to stdout instead of stderr
335 Comment_Deleted_Lines : Boolean := False;
337 -- True if source lines removed by the preprocessor should be commented
338 -- in the output file.
340 Compile_Only : Boolean := False;
341 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN
342 -- GNATMAKE, GPRMAKE, GPRMAKE:
343 -- set to True to skip bind and link steps (except when Bind_Only is
345 -- GNATCLEAN, GPRCLEAN:
346 -- set to True to delete only the files produced by the compiler but not
347 -- the library files or the executable files.
349 Config_File : Boolean := True;
351 -- Set to False to inhibit reading and processing of gnat.adc file
353 Config_File_Names : String_List_Access := null;
355 -- Names of configuration pragmas files (given by switches -gnatec)
357 Configurable_Run_Time_Mode : Boolean := False;
359 -- Set True if the compiler is operating in configurable run-time mode.
360 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
361 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
362 -- for details on the handling of the latter pragma.
364 Constant_Condition_Warnings : Boolean := False;
366 -- Set to True to activate warnings on constant conditions
368 Create_Mapping_File : Boolean := False;
370 -- Set to True (-C switch) to indicate that the compiler will be invoked
371 -- with a mapping file (-gnatem compiler switch).
373 Debug_Pragmas_Enabled : Boolean := False;
375 -- Enable debug statements from pragma Debug
377 subtype Debug_Level_Value is Nat range 0 .. 3;
378 Debugger_Level : Debug_Level_Value := 0;
380 -- The value given to the -g parameter. The default value for -g with
381 -- no value is 2. This is usually ignored by GNATBIND, except in the
382 -- VMS version where it is passed as an argument to __gnat_initialize
383 -- to trigger the activation of the remote debugging interface.
384 -- Is this still true ???
386 Debug_Generated_Code : Boolean := False;
388 -- Set True (-gnatD switch) to debug generated expanded code instead
389 -- of the original source code. Causes debugging information to be
390 -- written with respect to the generated code file that is written.
392 Default_Exit_Status : Int := 0;
394 -- Set the default exit status value. Set by the -Xnnn switch for the
397 Default_Stack_Size : Int := -1;
399 -- Set to default primary stack size in units of bytes. Set by
400 -- the -dnnn switch for the binder. A value of -1 indicates that no
401 -- default was set by the binder.
403 Default_Sec_Stack_Size : Int := -1;
405 -- Set to default secondary stack size in units of bytes. Set by
406 -- the -Dnnn switch for the binder. A value of -1 indicates that no
407 -- default was set by the binder, and that the default should be the
408 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
410 Default_Pool : Node_Id := Empty;
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.
420 Detect_Blocking : Boolean := False;
422 -- Set True to force the run time to raise Program_Error if calls to
423 -- potentially blocking operations are detected from protected actions.
425 Display_Compilation_Progress : Boolean := False;
426 -- GNATMAKE, GPRMAKE, GPRBUILD
427 -- Set True (-d switch) to display information on progress while compiling
428 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
430 type Distribution_Stub_Mode_Type is
433 -- Normal mode, no generation/compilation of distribution stubs
435 Generate_Receiver_Stub_Body,
436 -- The unit being compiled is the RCI body, and the compiler will
437 -- generate the body for the receiver stubs and compile it.
439 Generate_Caller_Stub_Body);
440 -- The unit being compiled is the RCI spec, and the compiler will
441 -- generate the body for the caller stubs and compile it.
443 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
445 -- This enumeration variable indicates the five states of distribution
446 -- annex stub generation/compilation.
448 Do_Not_Execute : Boolean := False;
450 -- Set to True if no actual compilations should be undertaken.
452 Dump_Source_Text : Boolean := False;
454 -- Set to True (by -gnatL) to dump source text intermingled with generated
455 -- code. Effective only if either of Debug/Print_Generated_Code is true.
457 Dynamic_Elaboration_Checks : Boolean := False;
459 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
460 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
462 Dynamic_Stack_Measurement : Boolean := False;
464 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
466 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
468 -- Number of measurements we want to store during dynamic stack analysis.
469 -- When the buffer is full, non-storable results will be output on the fly.
470 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
471 -- by processing of -u flag for gnatbind.
473 Elab_Dependency_Output : Boolean := False;
475 -- Set to True to output complete list of elaboration constraints
477 Elab_Order_Output : Boolean := False;
479 -- Set to True to output chosen elaboration order
481 Elab_Warnings : Boolean := False;
483 -- Set to True to generate full elaboration warnings (-gnatwl)
485 Enable_Overflow_Checks : Boolean := False;
487 -- Set to True if -gnato (enable overflow checks) switch is set,
490 Error_Msg_Line_Length : Nat := 0;
492 -- Records the error message line length limit. If this is set to zero,
493 -- then we get the old style behavior, in which each call to the error
494 -- message routines generates one line of output as a separate message.
495 -- If it is set to a non-zero value, then continuation lines are folded
496 -- to make a single long message, and then this message is split up into
497 -- multiple lines not exceeding the specified length. Set by -gnatj=nn.
499 Exception_Handler_Encountered : Boolean := False;
501 -- This flag is set true if the parser encounters an exception handler.
502 -- It is used to set Warn_On_Exception_Propagation True if the restriction
503 -- No_Exception_Propagation is set.
505 Exception_Extra_Info : Boolean := False;
507 -- True when switch -gnateE is used. When True, generate extra information
508 -- associated with exception messages (in particular range and index
511 Exception_Locations_Suppressed : Boolean := False;
513 -- Set to True if a Suppress_Exception_Locations configuration pragma is
516 type Exception_Mechanism_Type is
517 -- Determines the handling of exceptions. See Exp_Ch11 for details
519 (Front_End_Setjmp_Longjmp_Exceptions,
520 -- Exceptions use setjmp/longjmp generated explicitly by the
521 -- front end (this includes gigi or other equivalent parts of
522 -- the code generator). AT END handlers are converted into
523 -- exception handlers by the front end in this mode.
525 Back_End_Exceptions);
526 -- Exceptions are handled by the back end. The front end simply
527 -- generates the handlers as they appear in the source, and AT
528 -- END handlers are left untouched (they are not converted into
529 -- exception handlers when operating in this mode.
530 pragma Convention (C, Exception_Mechanism_Type);
532 Exception_Mechanism : Exception_Mechanism_Type :=
533 Front_End_Setjmp_Longjmp_Exceptions;
535 -- Set to the appropriate value depending on the default as given in
536 -- system.ads (ZCX_By_Default, GCC_ZCX_Support). The C convention is there
537 -- to make this variable accessible to gigi.
539 Exception_Tracebacks : Boolean := False;
541 -- Set to True to store tracebacks in exception occurrences (-E)
543 Extensions_Allowed : Boolean := False;
545 -- Set to True by switch -gnatX if GNAT specific language extensions
546 -- are allowed. For example, the use of 'Constrained with objects of
547 -- generic types is a GNAT extension.
549 type External_Casing_Type is (
550 As_Is, -- External names cased as they appear in the Ada source
551 Uppercase, -- External names forced to all uppercase letters
552 Lowercase); -- External names forced to all lowercase letters
554 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
556 -- The setting of this flag determines the casing of external names
557 -- when the name is implicitly derived from an entity name (i.e. either
558 -- no explicit External_Name or Link_Name argument is used, or, in the
559 -- case of extended DEC pragmas, the external name is given using an
560 -- identifier. The As_Is setting is not permitted here (since this would
561 -- create Ada source programs that were case sensitive).
563 External_Name_Exp_Casing : External_Casing_Type := As_Is;
565 -- The setting of this flag determines the casing of an external name
566 -- specified explicitly with a string literal. As_Is means the string
567 -- literal is used as given with no modification to the casing. If
568 -- Lowercase or Uppercase is set, then the string is forced to all
569 -- lowercase or all uppercase letters as appropriate. Note that this
570 -- setting has no effect if the external name is given using an identifier
571 -- in the case of extended DEC import/export pragmas (in this case the
572 -- casing is controlled by External_Name_Imp_Casing), and also has no
573 -- effect if an explicit Link_Name is supplied (a link name is always
574 -- used exactly as given).
576 External_Unit_Compilation_Allowed : Boolean := False;
578 -- When True (set by gnatmake switch -x), allow compilation of sources
579 -- that are not part of any project file.
581 Fast_Math : Boolean := False;
583 -- Indicates the current setting of Fast_Math mode, as set by the use
584 -- of a Fast_Math pragma (set on by Fast_Math (On)).
586 Float_Format : Character := ' ';
588 -- A non-blank value indicates that a Float_Format pragma has been
589 -- processed, in which case this variable is set to 'I' for IEEE or
590 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
593 Float_Format_Long : Character := ' ';
595 -- A non-blank value indicates that a Long_Float pragma has been
596 -- processed (this pragma is recognized only in OpenVMS versions
597 -- of GNAT), in which case this variable is set to D or G for
598 -- D_Float or G_Float.
600 Force_ALI_Tree_File : Boolean := False;
602 -- Force generation of ALI file even if errors are encountered.
603 -- Also forces generation of tree file if -gnatt is also set.
605 Force_Checking_Of_Elaboration_Flags : Boolean := False;
607 -- True if binding with forced checking of the elaboration flags
610 Force_Compilations : Boolean := False;
611 -- GNATMAKE, GPRMAKE, GPRBUILD
612 -- Set to force recompilations even when the objects are up-to-date.
614 Full_Path_Name_For_Brief_Errors : Boolean := False;
616 -- When True, in Brief_Output mode, each error message line
617 -- will start with the full path name of the source.
618 -- When False, only the file name without directory information
621 Full_List : Boolean := False;
623 -- Set True to generate full source listing with embedded errors
625 Full_List_File_Name : String_Ptr := null;
627 -- Set to file name to generate full source listing to named file (or if
628 -- the name is of the form .xxx, then to name.xxx where name is the source
629 -- file name with extension stripped.
631 Generate_Processed_File : Boolean := False;
633 -- True when switch -gnateG is used. When True, create in a file
634 -- <source>.prep, if the source is preprocessed.
636 Generate_SCO : Boolean := False;
638 -- True when switch -gnateS is used. When True, Source Coverage Obligation
639 -- (SCO) information is generated and output in the ALI file. See unit
640 -- Par_SCO for full details.
642 Generating_Code : Boolean := False;
644 -- True if the frontend finished its work and has called the backend to
645 -- process the tree and generate the object file.
647 Global_Discard_Names : Boolean := False;
649 -- True if a pragma Discard_Names appeared as a configuration pragma for
650 -- the current compilation unit.
652 GNAT_Mode : Boolean := False;
654 -- True if compiling in GNAT system mode (-gnatg switch)
656 Heap_Size : Nat := 0;
658 -- Heap size for memory allocations. Valid values are 32 and 64. Only
661 HLO_Active : Boolean := False;
663 -- True if High Level Optimizer is activated (-gnatH switch)
665 Identifier_Character_Set : Character;
667 -- This variable indicates the character set to be used for identifiers.
668 -- The possible settings are:
669 -- '1' Latin-5 (ISO-8859-1)
670 -- '2' Latin-5 (ISO-8859-2)
671 -- '3' Latin-5 (ISO-8859-3)
672 -- '4' Latin-5 (ISO-8859-4)
673 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
674 -- '9' Latin-5 (ISO-8859-9)
675 -- 'p' PC (US, IBM page 437)
676 -- '8' PC (European, IBM page 850)
677 -- 'f' Full upper set (all distinct)
678 -- 'n' No upper characters (Ada 83 rules)
679 -- 'w' Latin-1 plus wide characters allowed in identifiers
681 -- The setting affects the set of letters allowed in identifiers and the
682 -- upper/lower case equivalences. It does not affect the interpretation of
683 -- character and string literals, which are always stored using the actual
684 -- coding in the source program. This variable is initialized to the
685 -- default value appropriate to the system (in Osint.Initialize), and then
686 -- reset if a command line switch is used to change the setting.
688 Ignore_Rep_Clauses : Boolean := False;
690 -- Set True to ignore all representation clauses. Useful when compiling
691 -- code from foreign compilers for checking or ASIS purposes. Can be
692 -- set True by use of -gnatI.
694 Implementation_Unit_Warnings : Boolean := True;
696 -- Set True to active warnings for use of implementation internal units.
697 -- Can be controlled by use of -gnatwi/-gnatwI.
699 Implicit_Packing : Boolean := False;
701 -- If set True, then a Size attribute clause on an array is allowed to
702 -- cause implicit packing instead of generating an error message. Set by
703 -- use of pragma Implicit_Packing.
705 Ineffective_Inline_Warnings : Boolean := False;
707 -- Set True to activate warnings if front-end inlining (-gnatN) is not
708 -- able to actually inline a particular call (or all calls). Can be
709 -- controlled by use of -gnatwp/-gnatwP.
711 Init_Or_Norm_Scalars : Boolean := False;
713 -- Set True if a pragma Initialize_Scalars applies to the current unit.
714 -- Also set True if a pragma Normalize_Scalars applies.
716 Initialize_Scalars : Boolean := False;
718 -- Set True if a pragma Initialize_Scalars applies to the current unit.
719 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
721 Initialize_Scalars_Mode1 : Character := 'I';
722 Initialize_Scalars_Mode2 : Character := 'N';
724 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
725 -- is IN (invalid values), used if no -S switch is used.
727 Inline_Active : Boolean := False;
729 -- Set True to activate pragma Inline processing across modules. Default
730 -- for now is not to inline across module boundaries.
732 Interface_Library_Unit : Boolean := False;
734 -- Set to True to indicate that at least one ALI file is an interface ALI:
735 -- then elaboration flag checks are to be generated in the binder
738 Generate_SCIL : Boolean := False;
740 -- Set True to activate SCIL code generation.
742 Invalid_Value_Used : Boolean := False;
744 -- Set True if a valid Invalid_Value attribute is encountered
746 Follow_Links_For_Files : Boolean := False;
748 -- Set to True (-eL) to process the project files in trusted mode. If
749 -- Follow_Links is False, it is assumed that the project doesn't contain
750 -- any file duplicated through symbolic links (although the latter are
751 -- still valid if they point to a file which is outside of the project),
752 -- and that no directory has a name which is a valid source name.
754 Follow_Links_For_Dirs : Boolean := False;
756 -- Set to True if directories can be links in this project, and therefore
757 -- additional system calls must be performed to ensure that we always see
758 -- the same full name for each directory.
760 Front_End_Inlining : Boolean := False;
762 -- Set True to activate inlining by front-end expansion
764 Inline_Processing_Required : Boolean := False;
766 -- Set True if inline processing is required. Inline processing is required
767 -- if an active Inline pragma is processed. The flag is set for a pragma
768 -- Inline or Inline_Always that is actually active.
770 In_Place_Mode : Boolean := False;
772 -- Set True to store ALI and object files in place i.e. in the object
773 -- directory if these files already exist or in the source directory
776 Keep_Going : Boolean := False;
777 -- GNATMAKE, GPRMAKE, GPRBUILD
778 -- When True signals to ignore compilation errors and keep processing
779 -- sources until there is no more work.
781 Keep_Temporary_Files : Boolean := False;
783 -- When True the temporary files created by the GNAT driver are not
784 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
786 Leap_Seconds_Support : Boolean := False;
788 -- Set to True to enable leap seconds support in Ada.Calendar and its
791 Link_Only : Boolean := False;
792 -- GNATMAKE, GPRMAKE, GPRBUILD
793 -- Set to True to skip compile and bind steps (except when Bind_Only is
796 List_Inherited_Aspects : Boolean := True;
798 -- List inherited invariants, preconditions, and postconditions from
799 -- Invariant'Class, Pre'Class, and Post'Class aspects.
801 List_Restrictions : Boolean := False;
803 -- Set to True to list restrictions pragmas that could apply to partition
805 List_Units : Boolean := False;
807 -- List units in the active library for a compilation (-gnatu switch)
809 List_Closure : Boolean := False;
811 -- List all sources in the closure of a main (-R gnatbind switch)
813 List_Dependencies : Boolean := False;
815 -- When True gnatmake verifies that the objects are up to date and
816 -- outputs the list of object dependencies (-M switch).
817 -- Output depends if -a switch is used or not.
818 -- This list can be used directly in a Makefile.
820 List_Representation_Info : Int range 0 .. 3 := 0;
822 -- Set non-zero by -gnatR switch to list representation information.
823 -- The settings are as follows:
825 -- 0 = no listing of representation information (default as above)
826 -- 1 = list rep info for user defined record and array types
827 -- 2 = list rep info for all user defined types and objects
828 -- 3 = like 2, but variable fields are decoded symbolically
830 List_Representation_Info_To_File : Boolean := False;
832 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3 to be
833 -- written to file.rep (where file is the name of the source file) instead
834 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then
835 -- representation info is written to x.adb.ref.
837 List_Representation_Info_Mechanisms : Boolean := False;
839 -- Set true by -gnatRm switch. Causes information on mechanisms to be
840 -- included in the representation output information.
842 List_Preprocessing_Symbols : Boolean := False;
844 -- Set to True if symbols for preprocessing a source are to be listed
845 -- before preprocessing occurs. Set to True by switch -s of gnatprep or
846 -- -s in preprocessing data file for the compiler.
848 type Create_Repinfo_File_Proc is access procedure (Src : String);
849 type Write_Repinfo_Line_Proc is access procedure (Info : String);
850 type Close_Repinfo_File_Proc is access procedure;
851 -- Types used for procedure addresses below
853 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
854 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
855 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
857 -- These three locations are left null when operating in non-compiler (e.g.
858 -- ASIS mode), but when operating in compiler mode, they are set to point
859 -- to the three corresponding procedures in Osint-C. The reason for this
860 -- slightly strange interface is to stop Repinfo from dragging in Osint in
861 -- ASIS mode, which would include lots of unwanted units in the ASIS build.
863 type Create_List_File_Proc is access procedure (S : String);
864 type Write_List_Info_Proc is access procedure (S : String);
865 type Close_List_File_Proc is access procedure;
866 -- Types used for procedure addresses below
868 Create_List_File_Access : Create_List_File_Proc := null;
869 Write_List_Info_Access : Write_List_Info_Proc := null;
870 Close_List_File_Access : Close_List_File_Proc := null;
872 -- These three locations are left null when operating in non-compiler
873 -- (e.g. from the binder), but when operating in compiler mode, they are
874 -- set to point to the three corresponding procedures in Osint-C. The
875 -- reason for this slightly strange interface is to prevent Repinfo
876 -- from dragging in Osint-C in the binder, which would include unwanted
877 -- units in the binder.
879 Locking_Policy : Character := ' ';
881 -- Set to ' ' for the default case (no locking policy specified). Reset to
882 -- first character (uppercase) of locking policy name if a valid pragma
883 -- Locking_Policy is encountered.
885 Locking_Policy_Sloc : Source_Ptr := No_Location;
887 -- Remember location of previous Locking_Policy pragma. This is used for
888 -- inconsistency error messages. A value of System_Location is used if the
889 -- policy is set in package System.
891 Look_In_Primary_Dir : Boolean := True;
892 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
893 -- Set to False if a -I- was present on the command line. When True we are
894 -- allowed to look in the primary directory to locate other source or
897 Make_Steps : Boolean := False;
899 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
902 Main_Index : Int := 0;
904 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
905 -- the main program is the nnn unit in a multi-unit source file.
907 Mapping_File_Name : String_Ptr := null;
909 -- File name of mapping between unit names, file names and path names.
910 -- (given by switch -gnatem)
912 Maximum_Messages : Int := 9999;
914 -- Maximum default number of errors before compilation is terminated, or in
915 -- the case of GNAT, maximum number of warnings before further warnings are
916 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch.
918 Maximum_File_Name_Length : Int;
920 -- Maximum number of characters allowed in a file name, not counting the
921 -- extension, as set by the appropriate switch. If no switch is given,
922 -- then this value is initialized by Osint to the appropriate value.
924 Maximum_Processes : Positive := 1;
925 -- GNATMAKE, GPRMAKE, GPRBUILD
926 -- Maximum number of processes that should be spawned to carry out
929 Minimal_Recompilation : Boolean := False;
931 -- Set to True if minimal recompilation mode requested
933 Special_Exception_Package_Used : Boolean := False;
935 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
936 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
937 -- local raise statements into gotos in the presence of either package.
939 Multiple_Unit_Index : Int;
941 -- This is set non-zero if the current unit is being compiled in multiple
942 -- unit per file mode, meaning that the current unit is selected from the
943 -- sequence of units in the current source file, using the value stored
944 -- in this variable (e.g. 2 = select second unit in file). A value of
945 -- zero indicates that we are in normal (one unit per file) mode.
947 No_Main_Subprogram : Boolean := False;
948 -- GNATMAKE, GNATBIND
949 -- Set to True if compilation/binding of a program without main
950 -- subprogram requested.
952 No_Run_Time_Mode : Boolean := False;
954 -- This flag is set True if a No_Run_Time pragma is encountered. See
955 -- spec of Rtsfind for a full description of handling of this pragma.
957 No_Split_Units : Boolean := False;
959 -- Set to True with switch --no-split-units. When True, unit sources, spec,
960 -- body and subunits, must all be in the same project.This is checked after
963 No_Stdinc : Boolean := False;
964 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
965 -- Set to True if no default source search dirs added to search list
967 No_Stdlib : Boolean := False;
968 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
969 -- Set to True if no default library search dirs added to search list
971 No_Strict_Aliasing : Boolean := False;
973 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
975 Normalize_Scalars : Boolean := False;
977 -- Set True if a pragma Normalize_Scalars applies to the current unit.
978 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
980 Object_Directory_Present : Boolean := False;
982 -- Set to True when an object directory is specified with option -D
984 One_Compilation_Per_Obj_Dir : Boolean := False;
985 -- GNATMAKE, GPRBUILD
986 -- Set to True with switch --single-compile-per-obj-dir. When True, there
987 -- cannot be simultaneous compilations with the object files in the same
988 -- object directory, if project files are used.
990 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
991 Operating_Mode : Operating_Mode_Type := Generate_Code;
993 -- Indicates the operating mode of the compiler. The default is generate
994 -- code, which runs the parser, semantics and backend. Switches can be
995 -- used to set syntax checking only mode, or syntax and semantics checking
996 -- only mode. Operating_Mode can also be modified as a result of detecting
997 -- errors during the compilation process. In particular if any serious
998 -- error is detected then this flag is reset from Generate_Code to
999 -- Check_Semantics after generating an error message.
1001 Optimize_Alignment : Character := 'O';
1002 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can
1003 -- be modified by use of pragma Optimize_Alignment.
1005 Optimize_Alignment_Local : Boolean := False;
1006 -- Set True if Optimize_Alignment mode is set by a local configuration
1007 -- pragma that overrides the gnat.adc (or other configuration file) default
1008 -- so that the unit is not dependent on the default setting. Also always
1009 -- set True for internal units, since these always have a default setting
1010 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to
1011 -- them all having such an explicit pragma in each unit).
1013 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
1015 -- Indicates the original operating mode of the compiler as set by compiler
1016 -- options. This is identical to Operating_Mode except that this is not
1017 -- affected by errors.
1019 Optimization_Level : Int;
1020 pragma Import (C, Optimization_Level, "optimize");
1021 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
1022 -- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and
1023 -- GNAAMP back ends.
1025 Optimize_Size : Int;
1026 pragma Import (C, Optimize_Size, "optimize_size");
1027 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero
1028 -- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c
1029 -- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends
1031 Output_File_Name_Present : Boolean := False;
1032 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
1033 -- Set to True when the output C file name is given with option -o for
1034 -- GNATBIND, when the object file name is given with option -gnatO for GNAT
1035 -- or when the executable is given with option -o for GNATMAKE or GPRMAKE.
1037 Output_Linker_Option_List : Boolean := False;
1039 -- True if output of list of linker options is requested (-K switch set)
1041 Output_ALI_List : Boolean := False;
1042 ALI_List_Filename : String_Ptr;
1044 -- True if output of list of ALIs is requested (-A switch set). List is
1045 -- output under the given filename, or standard output if not specified.
1047 Output_Object_List : Boolean := False;
1048 Object_List_Filename : String_Ptr;
1050 -- True if output of list of objects is requested (-O switch set). List is
1051 -- output under the given filename, or standard output if not specified.
1053 Overflow_Checks_Unsuppressed : Boolean := False;
1055 -- Set to True if at least one occurrence of pragma Unsuppress
1056 -- (All_Checks|Overflow_Checks) has been processed.
1058 Persistent_BSS_Mode : Boolean := False;
1060 -- True if a Persistent_BSS configuration pragma is in effect, causing
1061 -- potentially persistent data to be placed in the persistent_bss section.
1063 Pessimistic_Elab_Order : Boolean := False;
1065 -- True if pessimistic elaboration order is to be chosen (-p switch set)
1067 Polling_Required : Boolean := False;
1069 -- Set to True if polling for asynchronous abort is enabled by using
1070 -- the -gnatP option for GNAT.
1072 Preprocessing_Data_File : String_Ptr := null;
1074 -- Set by switch -gnatep=. The file name of the preprocessing data file.
1076 Preprocessing_Symbol_Defs : String_List_Access := new String_List (1 .. 4);
1077 -- An extensible array to temporarily stores symbol definitions specified
1078 -- on the command line with -gnateD switches.
1079 -- What is this magic constant 4 ???
1080 -- What is extensible about this fixed length array ???
1082 Preprocessing_Symbol_Last : Natural := 0;
1083 -- Index of last symbol definition in array Symbol_Definitions
1085 Print_Generated_Code : Boolean := False;
1087 -- Set to True to enable output of generated code in source form. This
1088 -- flag is set by the -gnatG switch.
1090 Print_Standard : Boolean := False;
1092 -- Set to true to enable printing of package standard in source form.
1093 -- This flag is set by the -gnatS switch
1095 Propagate_Exceptions : Boolean := False;
1097 -- Indicates if subprogram descriptor exception tables should be
1098 -- built for imported subprograms. Set True if a Propagate_Exceptions
1099 -- pragma applies to the extended main unit.
1101 type Usage is (Unknown, Not_In_Use, In_Use);
1102 Project_File_In_Use : Usage := Unknown;
1104 -- Indicates if a project file is used or not. Set to In_Use by the first
1107 Queuing_Policy : Character := ' ';
1109 -- Set to ' ' for the default case (no queuing policy specified). Reset to
1110 -- first character (uppercase) of locking policy name if a valid
1111 -- Queuing_Policy pragma is encountered.
1113 Queuing_Policy_Sloc : Source_Ptr := No_Location;
1115 -- Remember location of previous Queuing_Policy pragma. This is used for
1116 -- inconsistency error messages. A value of System_Location is used if the
1117 -- policy is set in package System.
1119 Quiet_Output : Boolean := False;
1120 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN
1121 -- Set to True if the tool should not have any output if there are no
1122 -- errors or warnings.
1124 Replace_In_Comments : Boolean := False;
1126 -- Set to True if -C switch used
1128 RTS_Lib_Path_Name : String_Ptr := null;
1129 RTS_Src_Path_Name : String_Ptr := null;
1131 -- Set to the "adalib" and "adainclude" directories of the run time
1132 -- specified by --RTS=.
1134 RTS_Switch : Boolean := False;
1135 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
1136 -- Set to True when the --RTS switch is set
1138 Run_Path_Option : Boolean := True;
1139 -- GNATMAKE, GNATLINK
1140 -- Set to False when no run_path_option should be issued to the linker
1142 Search_Directory_Present : Boolean := False;
1144 -- Set to True when argument is -I. Reset to False when next argument, a
1145 -- search directory path is taken into account. Note that this is quite
1146 -- different from other switches in this section in that it is only set in
1147 -- a transitory manner as a result of scanning a -I switch with no file
1148 -- name, and if set, is an indication that the next argument is to be
1149 -- treated as a file name.
1151 Sec_Stack_Used : Boolean := False;
1153 -- Set True if generated code uses the System.Secondary_Stack package. For
1154 -- the binder, set if any unit uses the secondary stack package.
1156 Setup_Projects : Boolean := False;
1158 -- Set to True for GNAT SETUP: the Project Manager creates non existing
1159 -- object, library and exec directories.
1161 Shared_Libgnat : Boolean;
1163 -- Set to True if a shared libgnat is requested by using the -shared option
1164 -- for GNATBIND and to False when using the -static option. The value of
1165 -- this flag is set by Gnatbind.Scan_Bind_Arg.
1167 Short_Circuit_And_Or : Boolean := False;
1169 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit.
1171 Short_Descriptors : Boolean := False;
1173 -- Set True if a pragma Short_Descriptors applies to the current unit.
1175 Sprint_Line_Limit : Nat := 72;
1177 -- Limit values for chopping long lines in Sprint output, can be reset
1178 -- by use of NNN parameter with -gnatG or -gnatD switches.
1180 Stack_Checking_Enabled : Boolean;
1182 -- Set to indicate if -fstack-check switch is set for the compilation. True
1183 -- means that the switch is set, so that stack checking is enabled. False
1184 -- means that the switch is not set (no stack checking). This value is
1185 -- obtained from the external imported value flag_stack_check in the gcc
1186 -- backend (see Frontend) and may be referenced throughout the compilation
1189 Style_Check : Boolean := False;
1191 -- Set True to perform style checks. Activates checks carried out in
1192 -- package Style (see body of this package for details of checks). This
1193 -- flag is set True by either the -gnatg or -gnaty switches.
1195 Suppress_All_Inlining : Boolean := False;
1197 -- Set by -fno-inline. Suppresses all inlining, both front end and back end
1198 -- regardless of any other switches that are set.
1200 Suppress_Control_Flow_Optimizations : Boolean := False;
1202 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations
1203 -- that interfere with coverage analysis based on the object code.
1205 System_Extend_Pragma_Arg : Node_Id := Empty;
1207 -- Set non-empty if and only if a correct Extend_System pragma was present
1208 -- in which case it points to the argument of the pragma, and the name can
1209 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
1211 System_Extend_Unit : Node_Id := Empty;
1213 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
1214 -- is never appropriate in GNAT_Mode (and causes troubles, including
1215 -- bogus circularities, if we try to compile the run-time library with
1216 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
1217 -- is a copy of the value set in System_Extend_Pragma_Arg.
1219 Subunits_Missing : Boolean := False;
1221 -- This flag is set true if missing subunits are detected with code
1222 -- generation active. This causes code generation to be skipped.
1224 Suppress_Checks : Boolean := False;
1226 -- Set to True if -gnatp (suppress all checks) switch present.
1228 Suppress_Options : Suppress_Array;
1230 -- Flags set True to suppress corresponding check, i.e. add an implicit
1231 -- pragma Suppress at the outer level of each unit compiled. Note that
1232 -- these suppress actions can be overridden by the use of the Unsuppress
1233 -- pragma. This variable is initialized by Osint.Initialize.
1235 Suppress_Back_Annotation : Boolean := False;
1237 -- This flag is set True if back annotation of representation information
1238 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
1239 -- This avoids unnecessary time being spent on back annotation.
1241 Table_Factor : Int := 1;
1243 -- Factor by which all initial table sizes set in Alloc are multiplied.
1244 -- Used in Table to calculate initial table sizes (the initial table size
1245 -- is the value in Alloc, used as the Table_Initial parameter value,
1246 -- multiplied by the factor given here. The default value is used if no
1247 -- -gnatT switch appears.
1249 Tagged_Type_Expansion : Boolean := True;
1251 -- Set True if tagged types and interfaces should be expanded by the
1252 -- front-end. If False, the original tree is left unexpanded for tagged
1253 -- types and dispatching calls, assuming the underlying target supports
1254 -- it (e.g. in the JVM case).
1256 Task_Dispatching_Policy : Character := ' ';
1258 -- Set to ' ' for the default case (no task dispatching policy specified).
1259 -- Reset to first character (uppercase) of task dispatching policy name
1260 -- if a valid Task_Dispatching_Policy pragma is encountered.
1262 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
1264 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1265 -- used for inconsistency error messages. A value of System_Location is
1266 -- used if the policy is set in package System.
1268 Tasking_Used : Boolean := False;
1269 -- Set True if any tasking construct is encountered. Used to activate the
1270 -- output of the Q, L and T lines in ALI files.
1272 Time_Slice_Set : Boolean := False;
1274 -- Set True if a pragma Time_Slice is processed in the main unit, or
1275 -- if the -gnatTnn switch is present to set a time slice value.
1277 Time_Slice_Value : Nat;
1279 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1280 -- Time_Slice pragma has been processed. Set to the time slice value in
1281 -- microseconds. Negative values are stored as zero, and the value is not
1282 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1283 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1285 Tolerate_Consistency_Errors : Boolean := False;
1287 -- Tolerate time stamp and other consistency errors. If this flag is set to
1288 -- True (-t), then inconsistencies result in warnings rather than errors.
1290 Treat_Categorization_Errors_As_Warnings : Boolean := False;
1291 -- Normally categorization errors are true illegalities. If this switch
1292 -- is set, then such errors result in warning messages rather than error
1293 -- messages. Set True by -gnateP (P for Pure/Preelaborate).
1295 Treat_Restrictions_As_Warnings : Boolean := False;
1297 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
1300 Tree_Output : Boolean := False;
1302 -- Set to True (-gnatt) to generate output tree file
1304 True_VMS_Target : Boolean := False;
1305 -- Set True if we are on a VMS target. The setting of this flag reflects
1306 -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which
1307 -- can also be true when debug flag m is set (-gnatdm). This is used in the
1308 -- few cases where we do NOT want -gnatdm to trigger the VMS behavior.
1310 Try_Semantics : Boolean := False;
1312 -- Flag set to force attempt at semantic analysis, even if parser errors
1313 -- occur. This will probably cause blowups at this stage in the game. On
1314 -- the other hand, most such blowups will be caught cleanly and simply
1315 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
1317 Unchecked_Shared_Lib_Imports : Boolean := False;
1319 -- Set to True when shared library projects are allowed to import projects
1320 -- that are not shared library projects. Set by switch
1321 -- --unchecked-shared-lib-imports.
1323 Undefined_Symbols_Are_False : Boolean := False;
1325 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1326 -- file for the compiler. Indicates that while preprocessing sources,
1327 -- symbols that are not defined have the value FALSE.
1329 Unique_Error_Tag : Boolean := Tag_Errors;
1331 -- Indicates if error messages are to be prefixed by the string error:
1332 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1334 Universal_Addressing_On_AAMP : Boolean := False;
1336 -- Indicates if library-level objects should be accessed and updated using
1337 -- universal addressing instructions on the AAMP architecture. This flag is
1338 -- set to True when pragma Universal_Data is given as a configuration
1341 Unreserve_All_Interrupts : Boolean := False;
1343 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1344 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1345 -- corresponding attribute set in GNATBIND.
1347 Upper_Half_Encoding : Boolean := False;
1349 -- Normally set False, indicating that upper half ISO 8859-1 characters are
1350 -- used in the normal way to represent themselves. If the wide character
1351 -- encoding method uses the upper bit for this encoding, then this flag is
1352 -- set True, and upper half characters in the source indicate the start of
1353 -- a wide character sequence. Set by -gnatW or -W switches.
1355 Use_Include_Path_File : Boolean := False;
1356 -- GNATMAKE, GPRBUILD
1357 -- When True, create a source search path file, even when a mapping file
1360 Usage_Requested : Boolean := False;
1361 -- GNAT, GNATBIND, GNATMAKE
1362 -- Set to True if -h (-gnath for the compiler) switch encountered
1363 -- requesting usage information
1365 Use_Expression_With_Actions : Boolean;
1366 -- The N_Expression_With_Actions node has been introduced relatively
1367 -- recently, and not all back ends are prepared to handle it yet. So
1368 -- we use this flag to suppress its use during a transitional period.
1369 -- Currently the default is False for all cases (set in gnat1drv).
1370 -- The default can be modified using -gnatd.X/-gnatd.Y.
1372 Use_Pragma_Linker_Constructor : Boolean := False;
1374 -- True if pragma Linker_Constructor applies to adainit
1376 Use_VADS_Size : Boolean := False;
1378 -- Set to True if a valid pragma Use_VADS_Size is processed
1380 Validity_Checks_On : Boolean := True;
1382 -- This flag determines if validity checking is on or off. The initial
1383 -- state is on, and the required default validity checks are active. The
1384 -- actual set of checks that is performed if Validity_Checks_On is set is
1385 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1386 -- is controlled by pragma Validity_Checks (On | Off), and also some
1387 -- generated compiler code (typically code that has to do with validity
1388 -- check generation) is compiled with this flag set to False. This flag is
1389 -- set to False by the -gnatp switch.
1391 Verbose_Mode : Boolean := False;
1392 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1393 -- GPRMAKE, GPRBUILD, GPRCLEAN
1394 -- Set to True to get verbose mode (full error message text and location
1395 -- information sent to standard output, also header, copyright and summary)
1397 type Verbosity_Level_Type is (None, Low, Medium, High);
1398 pragma Ordered (Verbosity_Level_Type);
1399 Verbosity_Level : Verbosity_Level_Type := High;
1400 -- GNATMAKE, GPRMAKE
1401 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1402 -- the level of verbosity of informational messages:
1404 -- In Low Verbosity, the reasons why a source is recompiled, the name
1405 -- of the executable and the reason it must be rebuilt is output.
1407 -- In Medium Verbosity, additional lines are output for each ALI file
1410 -- In High Verbosity, additional lines are output when the ALI file
1411 -- is part of an Ada library, is read-only or is part of the runtime.
1413 Warn_On_Ada_2005_Compatibility : Boolean := True;
1415 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1416 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1417 -- mode. Set False by -gnatwY.
1419 Warn_On_Ada_2012_Compatibility : Boolean := True;
1421 -- Set to True to generate all warnings on Ada 2012 compatibility issues,
1422 -- including warnings on Ada 2012 obsolescent features used in Ada 2012
1423 -- mode. Set False by -gnatwY.
1425 Warn_On_All_Unread_Out_Parameters : Boolean := False;
1427 -- Set to True to generate warnings in all cases where a variable is
1428 -- modified by being passed as to an OUT formal, but the resulting value is
1429 -- never read. The default is that this warning is suppressed, except in
1432 Warn_On_Assertion_Failure : Boolean := True;
1434 -- Set to True to activate warnings on assertions that can be determined
1435 -- at compile time will always fail. Set false by -gnatw.A.
1437 Warn_On_Assumed_Low_Bound : Boolean := True;
1439 -- Set to True to activate warnings for string parameters that are indexed
1440 -- with literals or S'Length, presumably assuming a lower bound of one. Set
1441 -- False by -gnatwW.
1443 Warn_On_Bad_Fixed_Value : Boolean := False;
1445 -- Set to True to generate warnings for static fixed-point expression
1446 -- values that are not an exact multiple of the small value of the type.
1448 Warn_On_Biased_Representation : Boolean := True;
1450 -- Set to True to generate warnings for size clauses, component clauses
1451 -- and component_size clauses that force biased representation. Set False
1454 Warn_On_Constant : Boolean := False;
1456 -- Set to True to generate warnings for variables that could be declared
1457 -- as constants. Modified by use of -gnatwk/K.
1459 Warn_On_Deleted_Code : Boolean := False;
1461 -- Set to True to generate warnings for code deleted by the front end
1462 -- for conditional statements whose outcome is known at compile time.
1463 -- Modified by use of -gnatwt/T.
1465 Warn_On_Dereference : Boolean := False;
1467 -- Set to True to generate warnings for implicit dereferences for array
1468 -- indexing and record component access. Modified by use of -gnatwd/D.
1470 Warn_On_Export_Import : Boolean := True;
1472 -- Set to True to generate warnings for suspicious use of export or
1473 -- import pragmas. Modified by use of -gnatwx/X.
1475 Warn_On_Hiding : Boolean := False;
1477 -- Set to True to generate warnings if a declared entity hides another
1478 -- entity. The default is that this warning is suppressed.
1480 Warn_On_Modified_Unread : Boolean := False;
1482 -- Set to True to generate warnings if a variable is assigned but is never
1483 -- read. Also controls warnings for similar cases involving out parameters,
1484 -- but only if there is only one out parameter for the procedure involved.
1485 -- The default is that this warning is suppressed.
1487 Warn_On_No_Value_Assigned : Boolean := True;
1489 -- Set to True to generate warnings if no value is ever assigned to a
1490 -- variable that is at least partially uninitialized. Set to false to
1491 -- suppress such warnings. The default is that such warnings are enabled.
1493 Warn_On_Non_Local_Exception : Boolean := False;
1495 -- Set to True to generate warnings for non-local exception raises and also
1496 -- handlers that can never handle a local raise. This warning is only ever
1497 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1498 -- default is not to generate the warnings except that if the source has
1499 -- at least one exception handler, and this restriction is set, and the
1500 -- warning was not explicitly turned off, then it is turned on by default.
1502 No_Warn_On_Non_Local_Exception : Boolean := False;
1504 -- This is set to True if the above warning is explicitly suppressed. We
1505 -- use this to avoid turning it on by default when No_Exception_Propagation
1506 -- restriction is set and an exception handler is present.
1508 Warn_On_Object_Renames_Function : Boolean := False;
1510 -- Set to True to generate warnings when a function result is renamed as
1511 -- an object. The default is that this warning is disabled.
1513 Warn_On_Obsolescent_Feature : Boolean := False;
1515 -- Set to True to generate warnings on use of any feature in Annex or if a
1516 -- subprogram is called for which a pragma Obsolescent applies.
1518 Warn_On_Overlap : Boolean := False;
1520 -- Set to True to generate warnings when a writable actual which is not
1521 -- a by-copy type overlaps with another actual in a subprogram call.
1523 Warn_On_Questionable_Missing_Parens : Boolean := True;
1525 -- Set to True to generate warnings for cases where parentheses are missing
1526 -- and the usage is questionable, because the intent is unclear.
1528 Warn_On_Parameter_Order : Boolean := False;
1530 -- Set to True to generate warnings for cases where the argument list for
1531 -- a call is a sequence of identifiers that match the formal identifiers,
1532 -- but are in the wrong order.
1534 Warn_On_Redundant_Constructs : Boolean := False;
1536 -- Set to True to generate warnings for redundant constructs (e.g. useless
1537 -- assignments/conversions). The default is that this warning is disabled.
1539 Warn_On_Reverse_Bit_Order : Boolean := True;
1541 -- Set to True to generate warning (informational) messages for component
1542 -- clauses that are affected by non-standard bit-order. The default is
1543 -- that this warning is enabled.
1545 Warn_On_Suspicious_Modulus_Value : Boolean := True;
1547 -- Set to True to generate warnings for suspicious modulus values. The
1548 -- default is that this warning is enabled.
1550 Warn_On_Unchecked_Conversion : Boolean := True;
1552 -- Set to True to generate warnings for unchecked conversions that may have
1553 -- non-portable semantics (e.g. because sizes of types differ). The default
1554 -- is that this warning is enabled.
1556 Warn_On_Unordered_Enumeration_Type : Boolean := False;
1558 -- Set to True to generate warnings for inappropriate uses (comparisons
1559 -- and explicit ranges) on unordered enumeration types (which includes
1560 -- all enumeration types for which pragma Ordered is not given). The
1561 -- default is that this warning is disabled.
1563 Warn_On_Unrecognized_Pragma : Boolean := True;
1565 -- Set to True to generate warnings for unrecognized pragmas. The default
1566 -- is that this warning is enabled.
1568 Warn_On_Unrepped_Components : Boolean := False;
1570 -- Set to True to generate warnings for the case of components of record
1571 -- which have a record representation clause but this component does not
1572 -- have a component clause. The default is that this warning is disabled.
1574 Warn_On_Warnings_Off : Boolean := False;
1576 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent),
1577 -- where either the pragma is never used, or it could be replaced by a
1578 -- pragma Unmodified or Unreferenced.
1580 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1581 Warning_Mode : Warning_Mode_Type := Normal;
1583 -- Controls treatment of warning messages. If set to Suppress, warning
1584 -- messages are not generated at all. In Normal mode, they are generated
1585 -- but do not count as errors. In Treat_As_Error mode, warning messages
1586 -- are generated and are treated as errors.
1588 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1590 -- Method used for encoding wide characters in the source program. See
1591 -- description of type in unit System.WCh_Con for a list of the methods
1592 -- that are currently supported. Note that brackets notation is always
1593 -- recognized in source programs regardless of the setting of this
1594 -- variable. The default setting causes only the brackets notation to be
1595 -- recognized. If this is the main unit, this setting also controls the
1596 -- output of the W=? parameter in the ALI file, which is used to provide
1597 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder,
1598 -- the value set here overrides this main unit default.
1600 Wide_Character_Encoding_Method_Specified : Boolean := False;
1602 -- Set True if the value in Wide_Character_Encoding_Method was set as
1603 -- a result of an explicit -gnatW? or -W? switch. False otherwise.
1605 Xref_Active : Boolean := True;
1607 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1609 Zero_Formatting : Boolean := False;
1611 -- Do no formatting (no title, no leading spaces, no empty lines) in
1612 -- auxiliary outputs (-e, -K, -l, -R).
1614 ----------------------------
1615 -- Configuration Settings --
1616 ----------------------------
1618 -- These are settings that are used to establish the mode at the start of
1619 -- each unit. The values defined below can be affected either by command
1620 -- line switches, or by the use of appropriate configuration pragmas in a
1621 -- configuration pragma file.
1623 Ada_Version_Config : Ada_Version_Type;
1625 -- This is the value of the configuration switch for the Ada 83 mode, as
1626 -- set by the command line switches -gnat83/95/05, and possibly modified by
1627 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1628 -- to set the initial value for Ada_Version mode at the start of analysis
1629 -- of a unit. Note however, that the setting of this flag is ignored for
1630 -- internal and predefined units (which are always compiled in the most up
1631 -- to date version of Ada).
1633 Ada_Version_Explicit_Config : Ada_Version_Type;
1635 -- This is set in the same manner as Ada_Version_Config. The difference is
1636 -- that the setting of this flag is not ignored for internal and predefined
1637 -- units, which for some purposes do indeed access this value, regardless
1638 -- of the fact that they are compiled the most up to date ada version).
1640 Assertions_Enabled_Config : Boolean;
1642 -- This is the value of the configuration switch for assertions enabled
1643 -- mode, as possibly set by the command line switch -gnata, and possibly
1644 -- modified by the use of the configuration pragma Assertion_Policy.
1646 Assume_No_Invalid_Values_Config : Boolean;
1648 -- This is the value of the configuration switch for assuming "no invalid
1649 -- values enabled" mode, as possibly set by the command line switch
1650 -- -gnatB, and possibly modified by the use of the configuration pragma
1651 -- Assume_No_Invalid_Values.
1653 Check_Policy_List_Config : Node_Id;
1655 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
1656 -- that are linked through the Next_Pragma fields, with the list being
1657 -- terminated by Empty. The order is most recently processed first. This
1658 -- list includes only those pragmas in configuration pragma files.
1660 Debug_Pragmas_Enabled_Config : Boolean;
1662 -- This is the value of the configuration switch for debug pragmas enabled
1663 -- mode, as possibly set by the command line switch -gnata and possibly
1664 -- modified by the use of the configuration pragma Debug_Policy.
1666 Default_Pool_Config : Node_Id := Empty;
1668 -- Same as Default_Pool above, except this is only for Default_Storage_Pool
1669 -- pragmas that are configuration pragmas.
1671 Dynamic_Elaboration_Checks_Config : Boolean := False;
1673 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1674 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1676 Exception_Locations_Suppressed_Config : Boolean := False;
1678 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1680 Extensions_Allowed_Config : Boolean;
1682 -- This is the flag that indicates whether extensions are allowed. It can
1683 -- be set True either by use of the -gnatX switch, or by use of the
1684 -- configuration pragma Extensions_Allowed (On). It is always set to True
1685 -- for internal GNAT units, since extensions are always permitted in such
1688 External_Name_Exp_Casing_Config : External_Casing_Type;
1690 -- This is the value of the configuration switch that controls casing of
1691 -- external symbols for which an explicit external name is given. It can be
1692 -- set to Uppercase by the command line switch -gnatF, and further modified
1693 -- by the use of the configuration pragma External_Name_Casing in the
1694 -- gnat.adc file. This flag is used to set the initial value for
1695 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1696 -- however that the setting of this flag is ignored for internal and
1697 -- predefined units (which are always compiled with As_Is mode).
1699 External_Name_Imp_Casing_Config : External_Casing_Type;
1701 -- This is the value of the configuration switch that controls casing of
1702 -- external symbols where the external name is implicitly given. It can be
1703 -- set to Uppercase by the command line switch -gnatF, and further modified
1704 -- by the use of the configuration pragma External_Name_Casing in the
1705 -- gnat.adc file. This flag is used to set the initial value for
1706 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1707 -- however that the setting of this flag is ignored for internal and
1708 -- predefined units (which are always compiled with Lowercase mode).
1710 Fast_Math_Config : Boolean;
1712 -- This is the value of the configuration switch that controls Fast_Math
1713 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is
1714 -- used to set the initial value of Fast_Math at the start of each new
1715 -- compilation unit.
1717 Initialize_Scalars_Config : Boolean;
1719 -- This is the value of the configuration switch that is set by the
1720 -- pragma Initialize_Scalars when it appears in the gnat.adc file.
1721 -- This switch is not set when the pragma appears ahead of a given
1722 -- unit, so it does not affect the compilation of other units.
1724 Optimize_Alignment_Config : Character;
1726 -- This is the value of the configuration switch that controls the
1727 -- alignment optimization mode, as set by an Optimize_Alignment pragma.
1728 -- It is used to set the initial value of Optimize_Alignment at the start
1729 -- of each new compilation unit, except that it is always set to 'O' (off)
1730 -- for internal units.
1732 Persistent_BSS_Mode_Config : Boolean;
1734 -- This is the value of the configuration switch that controls whether
1735 -- potentially persistent data is to be placed in the persistent_bss
1736 -- section. It can be set True by use of the pragma Persistent_BSS.
1737 -- This flag is used to set the initial value of Persistent_BSS_Mode
1738 -- at the start of each compilation unit, except that it is always
1739 -- set False for predefined units.
1741 Polling_Required_Config : Boolean;
1743 -- This is the value of the configuration switch that controls polling
1744 -- mode. It can be set True by the command line switch -gnatP, and then
1745 -- further modified by the use of pragma Polling in the gnat.adc file. This
1746 -- flag is used to set the initial value for Polling_Required at the start
1747 -- of analyzing each unit.
1749 Short_Descriptors_Config : Boolean;
1751 -- This is the value of the configuration switch that controls the use of
1752 -- Short_Descriptors for setting descriptor default sizes. It can be set
1753 -- True by the use of the pragma Short_Descriptors in the gnat.adc file.
1754 -- This flag is used to set the initial value for Short_Descriptors at the
1755 -- start of analyzing each unit.
1757 Use_VADS_Size_Config : Boolean;
1759 -- This is the value of the configuration switch that controls the use of
1760 -- VADS_Size instead of Size wherever the attribute Size is used. It can
1761 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1762 -- This flag is used to set the initial value for Use_VADS_Size at the
1763 -- start of analyzing each unit. Note however that the setting of this flag
1764 -- is ignored for internal and predefined units (which are always compiled
1765 -- with the standard Size semantics).
1767 type Config_Switches_Type is private;
1768 -- Type used to save values of the switches set from Config values
1770 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1771 -- This procedure saves the current values of the switches which are
1772 -- initialized from the above Config values, and then resets these switches
1773 -- according to the Config value settings.
1775 procedure Set_Opt_Config_Switches
1776 (Internal_Unit : Boolean;
1777 Main_Unit : Boolean);
1778 -- This procedure sets the switches to the appropriate initial values. The
1779 -- parameter Internal_Unit is True for an internal or predefined unit, and
1780 -- affects the way the switches are set (see above). Main_Unit is true if
1781 -- switches are being set for the main unit (this affects setting of the
1782 -- assert/debug pragma switches, which are normally set false by default
1783 -- for an internal unit, except when the internal unit is the main unit,
1784 -- in which case we use the command line settings).
1786 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1787 -- This procedure restores a set of switch values previously saved by a
1788 -- call to Save_Opt_Switches.
1790 procedure Register_Opt_Config_Switches;
1791 -- This procedure is called after processing the gnat.adc file and other
1792 -- configuration pragma files to record the values of the Config switches,
1793 -- as possibly modified by the use of command line switches and pragmas
1794 -- appearing in these files.
1796 ------------------------
1797 -- Other Global Flags --
1798 ------------------------
1800 Expander_Active : Boolean := False;
1801 -- A flag that indicates if expansion is active (True) or deactivated
1802 -- (False). When expansion is deactivated all calls to expander routines
1803 -- have no effect. Note that the initial setting of False is merely to
1804 -- prevent saving of an undefined value for an initial call to the
1805 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1806 -- this flag, see package Expander. Indeed this flag might more logically
1807 -- be in the spec of Expander, but it is referenced by Errout, and it
1808 -- really seems wrong for Errout to depend on Expander.
1810 Static_Dispatch_Tables : Boolean := True;
1811 -- This flag indicates if the backend supports generation of statically
1812 -- allocated dispatch tables. If it is True, then the front end will
1813 -- generate static aggregates for dispatch tables that contain forward
1814 -- references to addresses of subprograms not seen yet, and the back end
1815 -- must be prepared to handle this case. If it is False, then the front
1816 -- end generates assignments to initialize the dispatch table, and there
1817 -- are no such forward references. By default we build statically allocated
1818 -- dispatch tables for all library level tagged types in all platforms.This
1819 -- behavior can be disabled using switch -gnatd.t which will set this flag
1820 -- to False and revert to the previous dynamic behavior.
1822 -----------------------
1823 -- Tree I/O Routines --
1824 -----------------------
1826 procedure Tree_Read;
1827 -- Reads switch settings from current tree file using Tree_Read
1829 procedure Tree_Write;
1830 -- Writes out switch settings to current tree file using Tree_Write
1832 --------------------------
1833 -- ASIS Version Control --
1834 --------------------------
1836 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1837 -- are supposed to be used in the GNAT/ASIS version check performed in
1838 -- the ASIS code (this package is also a part of the ASIS implementation).
1839 -- They are set by Tree_Read procedure, so they represent the version
1840 -- number (and the version string) of the compiler which has created the
1841 -- tree, and they are supposed to be compared with the corresponding values
1842 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS
1845 Tree_Version_String : String_Access;
1846 -- Used to store the compiler version string read from a tree file to check
1847 -- if it is from the same date as stored in the version string in Gnatvsn.
1848 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1849 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1850 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1851 -- of the corresponding source sets, using version strings that may be
1852 -- of different lengths.
1854 Tree_ASIS_Version_Number : Int;
1855 -- Used to store the ASIS version number read from a tree file to check if
1856 -- it is the same as stored in the ASIS version number in Tree_IO.
1858 ----------------------------------
1859 -- Mode for Formal Verification --
1860 ----------------------------------
1862 -- This mode is currently defined through a debug flag
1864 ALFA_Mode : Boolean := False;
1865 -- Specific compiling mode targeting formal verification through the
1866 -- generation of Why code for those parts of the input code that belong to
1867 -- the ALFA subset of Ada. Set by debuf flag -gnatd.F.
1871 -- The following type is used to save and restore settings of switches in
1872 -- Opt that represent the configuration (i.e. result of config pragmas).
1874 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1875 -- flag that once set does not get reset, since the whole idea of this flag
1876 -- is to record the setting for the main unit.
1878 type Config_Switches_Type is record
1879 Ada_Version : Ada_Version_Type;
1880 Ada_Version_Explicit : Ada_Version_Type;
1881 Assertions_Enabled : Boolean;
1882 Assume_No_Invalid_Values : Boolean;
1883 Check_Policy_List : Node_Id;
1884 Debug_Pragmas_Enabled : Boolean;
1885 Default_Pool : Node_Id;
1886 Dynamic_Elaboration_Checks : Boolean;
1887 Exception_Locations_Suppressed : Boolean;
1888 Extensions_Allowed : Boolean;
1889 External_Name_Exp_Casing : External_Casing_Type;
1890 External_Name_Imp_Casing : External_Casing_Type;
1891 Fast_Math : Boolean;
1892 Initialize_Scalars : Boolean;
1893 Normalize_Scalars : Boolean;
1894 Optimize_Alignment : Character;
1895 Optimize_Alignment_Local : Boolean;
1896 Persistent_BSS_Mode : Boolean;
1897 Polling_Required : Boolean;
1898 Short_Descriptors : Boolean;
1899 Use_VADS_Size : Boolean;
1902 -- The following declarations are for GCC version dependent flags. We do
1903 -- not let client code in the compiler test GCC_Version directly, but
1904 -- instead use deferred constants for relevant feature tags.
1906 -- Note: there currently are no such constants defined in this section,
1907 -- since the compiler front end is currently entirely independent of the
1908 -- GCC version, which is a desirable state of affairs.
1910 function get_gcc_version return Int;
1911 pragma Import (C, get_gcc_version, "get_gcc_version");
1913 GCC_Version : constant Nat := get_gcc_version;
1915 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
1916 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.
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