1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2010, 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 -- Settings of Modes for Current Processing --
54 ----------------------------------------------
56 -- The following mode values represent the current state of processing.
57 -- The values set here are the default values. Unless otherwise noted,
58 -- the value may be reset in Switch-? with an appropriate switch. In
59 -- some cases, the values can also be modified by pragmas, and in the
60 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
61 -- the default values.
63 Ada_Bind_File : Boolean := True;
65 -- Set True if binder file to be generated in Ada rather than C
67 type Ada_Version_Type is (Ada_83, Ada_95, Ada_05);
68 pragma Warnings (Off, Ada_Version_Type);
69 -- Versions of Ada for Ada_Version below. Note that these are ordered,
70 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
71 -- The Warnings_Off pragma stops warnings for Ada_Version >= Ada_05,
72 -- which we want to allow, so that things work OK when Ada_15 is added!
73 -- This warning is now removed, so this pragma can be removed some time???
75 Ada_Version_Default : Ada_Version_Type := Ada_05;
77 -- Default Ada version if no switch given
79 Ada_Version : Ada_Version_Type := Ada_Version_Default;
81 -- Current Ada version for compiler, as set by configuration pragmas,
82 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
83 -- predefined or internal file is compiled.
85 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
87 -- Like Ada_Version, but does not get set implicitly for predefined
88 -- or internal units, so it reflects the Ada version explicitly set
89 -- using configuration pragmas or compiler switches (or if neither
90 -- appears, it remains set to Ada_Version_Default). This is used in
91 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
92 -- where in the run-time we want the explicit version set.
94 Ada_Version_Runtime : Ada_Version_Type := Ada_05;
96 -- Ada version used to compile the runtime. Used to set Ada_Version (but
97 -- not Ada_Version_Explicit) when compiling predefined or internal units.
99 Ada_Final_Suffix : constant String := "final";
100 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
102 -- The name of the procedure that performs the finalization at the end of
103 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
105 Ada_Init_Suffix : constant String := "init";
106 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
108 -- The name of the procedure that performs initialization at the start
109 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
111 Ada_Main_Name_Suffix : constant String := "main";
113 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
114 -- can be referenced in a uniform manner to create either the default
115 -- value of Ada_Main_Name (declared below), or the non-default name
116 -- set by Gnatbind.Scan_Bind_Arg.
118 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
120 -- The name of the Ada package generated by the binder (when in Ada mode).
121 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
123 Address_Clause_Overlay_Warnings : Boolean := True;
125 -- Set False to disable address clause warnings
127 Address_Is_Private : Boolean := False;
129 -- Set True if package System has the line "type Address is private;"
131 All_Errors_Mode : Boolean := False;
133 -- Flag set to force display of multiple errors on a single line and
134 -- also repeated error messages for references to undefined identifiers
135 -- and certain other repeated error messages. Set by use of -gnatf.
137 All_Sources : Boolean := False;
139 -- Set to True to require all source files to be present. This flag is
140 -- directly modified by gnatmake to affect the shared binder routines.
142 Alternate_Main_Name : String_Ptr := null;
144 -- Set to non null when Bind_Alternate_Main_Name is True. This value
145 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
147 ASIS_Mode : Boolean := False;
149 -- Enable semantic checks and tree transformations that are important
150 -- for ASIS but that are usually skipped if Operating_Mode is set to
151 -- Check_Semantics. This flag does not have the corresponding option to set
152 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
153 -- from the code of GNSA-based tool (a client may need to set ON the
154 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
155 -- make very much sense, because GNSA cannot do back annotation).
157 Assertions_Enabled : Boolean := False;
159 -- Enable assertions made using pragma Assert
161 Assume_No_Invalid_Values : Boolean := False;
163 -- Normally, in accordance with (RM 13.9.1 (9-11)) the front end assumes
164 -- that values could have invalid representations, unless it can clearly
165 -- prove that the values are valid. If this switch is set (by -gnatB or by
166 -- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values
167 -- are valid and in range of their representations. This feature is now
168 -- fully enabled in the compiler.
170 Back_Annotate_Rep_Info : Boolean := False;
172 -- If set True, enables back annotation of representation information
173 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
174 -- (list representation information) or -gnatt (generate tree). It is
175 -- also set true if certain Unchecked_Conversion instantiations require
176 -- checking based on annotated values.
178 Back_End_Handles_Limited_Types : Boolean;
179 -- This flag is set true if the back end can properly handle limited or
180 -- other by reference types, and avoid copies. If this flag is False, then
181 -- the front end does special expansion for conditional expressions to make
182 -- sure that no copy occurs. If the flag is True, then the expansion for
183 -- conditional expressions relies on the back end properly handling things.
184 -- Currently the default is False for all cases (set in gnat1drv). The
185 -- default can be modified using -gnatd.L (sets the flag True).
187 Bind_Alternate_Main_Name : Boolean := False;
189 -- True if main should be called Alternate_Main_Name.all.
190 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
192 Bind_Main_Program : Boolean := True;
194 -- Set to False if not binding main Ada program
196 Bind_For_Library : Boolean := False;
198 -- Set to True if the binder needs to generate a file designed for building
199 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg.
201 Bind_Only : Boolean := False;
202 -- GNATMAKE, GPRMAKE, GPRBUILD
203 -- Set to True to skip compile and link steps
204 -- (except when Compile_Only and/or Link_Only are True).
206 Blank_Deleted_Lines : Boolean := False;
208 -- Output empty lines for each line of preprocessed input that is deleted
209 -- in the output, including preprocessor lines starting with a '#'.
211 Brief_Output : Boolean := False;
213 -- Force brief error messages to standard error, even if verbose mode is
214 -- set (so that main error messages go to standard output).
216 Build_Bind_And_Link_Full_Project : Boolean := False;
218 -- Set to True to build, bind and link all the sources of a project file
221 Check_Object_Consistency : Boolean := False;
222 -- GNATBIND, GNATMAKE
223 -- Set to True to check whether every object file is consistent with
224 -- its corresponding ada library information (ALI) file. An object
225 -- file is inconsistent with the corresponding ALI file if the object
226 -- file does not exist or if it has an older time stamp than the ALI file.
227 -- Default above is for GNATBIND. GNATMAKE overrides this default to
228 -- True (see Make.Initialize) since we normally do need to check source
229 -- consistencies in gnatmake.
231 Check_Only : Boolean := False;
233 -- Set to True to do checks only, no output of binder file
235 Check_Policy_List : Node_Id := Empty;
237 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
238 -- that are linked through the Next_Pragma fields, with the list being
239 -- terminated by Empty. The order is most recently processed first. Note
240 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value
241 -- of this variable, implementing the required scope control for pragmas
242 -- appearing a declarative part.
244 Check_Readonly_Files : Boolean := False;
246 -- Set to True to check readonly files during the make process
248 Check_Source_Files : Boolean := True;
249 -- GNATBIND, GNATMAKE
250 -- Set to True to enable consistency checking for any source files that
251 -- are present (i.e. date must match the date in the library info file).
252 -- Set to False for object file consistency check only. This flag is
253 -- directly modified by gnatmake, to affect the shared binder routines.
255 Check_Switches : Boolean := False;
256 -- GNATMAKE, GPRMAKE, GPBUILD
257 -- Set to True to check compiler options during the make process
259 Check_Unreferenced : Boolean := False;
261 -- Set to True to enable checking for unreferenced entities other
262 -- than formal parameters (for which see Check_Unreferenced_Formals)
264 Check_Unreferenced_Formals : Boolean := False;
266 -- Set True to check for unreferenced formals. This is turned on by
267 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
269 Check_Withs : Boolean := False;
271 -- Set to True to enable checking for unused withs, and also the case
272 -- of withing a package and using none of the entities in the package.
274 CodePeer_Mode : Boolean := False;
276 -- Enable full CodePeer mode (SCIL generation, disable switches that
277 -- interact badly with it, etc...).
279 Commands_To_Stdout : Boolean := False;
281 -- True if echoed commands to be written to stdout instead of stderr
283 Comment_Deleted_Lines : Boolean := False;
285 -- True if source lines removed by the preprocessor should be commented
286 -- in the output file.
288 Compile_Only : Boolean := False;
289 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN
290 -- GNATMAKE, GPRMAKE, GPRMAKE:
291 -- set to True to skip bind and link steps (except when Bind_Only is
293 -- GNATCLEAN, GPRCLEAN:
294 -- set to True to delete only the files produced by the compiler but not
295 -- the library files or the executable files.
297 Config_File : Boolean := True;
299 -- Set to False to inhibit reading and processing of gnat.adc file
301 Config_File_Names : String_List_Access := null;
303 -- Names of configuration pragmas files (given by switches -gnatec)
305 Configurable_Run_Time_Mode : Boolean := False;
307 -- Set True if the compiler is operating in configurable run-time mode.
308 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
309 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
310 -- for details on the handling of the latter pragma.
312 Constant_Condition_Warnings : Boolean := False;
314 -- Set to True to activate warnings on constant conditions
316 Create_Mapping_File : Boolean := False;
318 -- Set to True (-C switch) to indicate that the compiler will be invoked
319 -- with a mapping file (-gnatem compiler switch).
321 Debug_Pragmas_Enabled : Boolean := False;
323 -- Enable debug statements from pragma Debug
325 subtype Debug_Level_Value is Nat range 0 .. 3;
326 Debugger_Level : Debug_Level_Value := 0;
328 -- The value given to the -g parameter. The default value for -g with
329 -- no value is 2. This is usually ignored by GNATBIND, except in the
330 -- VMS version where it is passed as an argument to __gnat_initialize
331 -- to trigger the activation of the remote debugging interface.
332 -- Is this still true ???
334 Debug_Generated_Code : Boolean := False;
336 -- Set True (-gnatD switch) to debug generated expanded code instead
337 -- of the original source code. Causes debugging information to be
338 -- written with respect to the generated code file that is written.
340 Default_Exit_Status : Int := 0;
342 -- Set the default exit status value. Set by the -Xnnn switch for the
345 Default_Stack_Size : Int := -1;
347 -- Set to default primary stack size in units of bytes. Set by
348 -- the -dnnn switch for the binder. A value of -1 indicates that no
349 -- default was set by the binder.
351 Default_Sec_Stack_Size : Int := -1;
353 -- Set to default secondary stack size in units of bytes. Set by
354 -- the -Dnnn switch for the binder. A value of -1 indicates that no
355 -- default was set by the binder, and that the default should be the
356 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
358 Detect_Blocking : Boolean := False;
360 -- Set True to force the run time to raise Program_Error if calls to
361 -- potentially blocking operations are detected from protected actions.
363 Display_Compilation_Progress : Boolean := False;
364 -- GNATMAKE, GPRMAKE, GPRBUILD
365 -- Set True (-d switch) to display information on progress while compiling
366 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
368 type Distribution_Stub_Mode_Type is
371 -- Normal mode, no generation/compilation of distribution stubs
373 Generate_Receiver_Stub_Body,
374 -- The unit being compiled is the RCI body, and the compiler will
375 -- generate the body for the receiver stubs and compile it.
377 Generate_Caller_Stub_Body);
378 -- The unit being compiled is the RCI spec, and the compiler will
379 -- generate the body for the caller stubs and compile it.
381 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
383 -- This enumeration variable indicates the five states of distribution
384 -- annex stub generation/compilation.
386 Do_Not_Execute : Boolean := False;
388 -- Set to True if no actual compilations should be undertaken.
390 Dump_Source_Text : Boolean := False;
392 -- Set to True (by -gnatL) to dump source text intermingled with generated
393 -- code. Effective only if either of Debug/Print_Generated_Code is true.
395 Dynamic_Elaboration_Checks : Boolean := False;
397 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
398 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
400 Dynamic_Stack_Measurement : Boolean := False;
402 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
404 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
406 -- Number of measurements we want to store during dynamic stack analysis.
407 -- When the buffer is full, non-storable results will be output on the fly.
408 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
409 -- by processing of -u flag for gnatbind.
411 Elab_Dependency_Output : Boolean := False;
413 -- Set to True to output complete list of elaboration constraints
415 Elab_Order_Output : Boolean := False;
417 -- Set to True to output chosen elaboration order
419 Elab_Warnings : Boolean := False;
421 -- Set to True to generate full elaboration warnings (-gnatwl)
423 Enable_Overflow_Checks : Boolean := False;
425 -- Set to True if -gnato (enable overflow checks) switch is set,
428 Error_Msg_Line_Length : Nat := 0;
430 -- Records the error message line length limit. If this is set to zero,
431 -- then we get the old style behavior, in which each call to the error
432 -- message routines generates one line of output as a separate message.
433 -- If it is set to a non-zero value, then continuation lines are folded
434 -- to make a single long message, and then this message is split up into
435 -- multiple lines not exceeding the specified length. Set by -gnatj=nn.
437 Exception_Handler_Encountered : Boolean := False;
439 -- This flag is set true if the parser encounters an exception handler.
440 -- It is used to set Warn_On_Exception_Propagation True if the restriction
441 -- No_Exception_Propagation is set.
443 Exception_Locations_Suppressed : Boolean := False;
445 -- This flag is set True if a Suppress_Exception_Locations configuration
446 -- pragma is currently active.
448 type Exception_Mechanism_Type is
449 -- Determines the handling of exceptions. See Exp_Ch11 for details
451 (Front_End_Setjmp_Longjmp_Exceptions,
452 -- Exceptions use setjmp/longjmp generated explicitly by the
453 -- front end (this includes gigi or other equivalent parts of
454 -- the code generator). AT END handlers are converted into
455 -- exception handlers by the front end in this mode.
457 Back_End_Exceptions);
458 -- Exceptions are handled by the back end. The front end simply
459 -- generates the handlers as they appear in the source, and AT
460 -- END handlers are left untouched (they are not converted into
461 -- exception handlers when operating in this mode.
462 pragma Convention (C, Exception_Mechanism_Type);
464 Exception_Mechanism : Exception_Mechanism_Type :=
465 Front_End_Setjmp_Longjmp_Exceptions;
467 -- Set to the appropriate value depending on the default as given in
468 -- system.ads (ZCX_By_Default, GCC_ZCX_Support). The C convention is there
469 -- to make this variable accessible to gigi.
471 Exception_Tracebacks : Boolean := False;
473 -- Set to True to store tracebacks in exception occurrences (-E)
475 Extensions_Allowed : Boolean := False;
477 -- Set to True by switch -gnatX if GNAT specific language extensions
478 -- are allowed. For example, the use of 'Constrained with objects of
479 -- generic types is a GNAT extension.
481 type External_Casing_Type is (
482 As_Is, -- External names cased as they appear in the Ada source
483 Uppercase, -- External names forced to all uppercase letters
484 Lowercase); -- External names forced to all lowercase letters
486 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
488 -- The setting of this flag determines the casing of external names
489 -- when the name is implicitly derived from an entity name (i.e. either
490 -- no explicit External_Name or Link_Name argument is used, or, in the
491 -- case of extended DEC pragmas, the external name is given using an
492 -- identifier. The As_Is setting is not permitted here (since this would
493 -- create Ada source programs that were case sensitive).
495 External_Name_Exp_Casing : External_Casing_Type := As_Is;
497 -- The setting of this flag determines the casing of an external name
498 -- specified explicitly with a string literal. As_Is means the string
499 -- literal is used as given with no modification to the casing. If
500 -- Lowercase or Uppercase is set, then the string is forced to all
501 -- lowercase or all uppercase letters as appropriate. Note that this
502 -- setting has no effect if the external name is given using an identifier
503 -- in the case of extended DEC import/export pragmas (in this case the
504 -- casing is controlled by External_Name_Imp_Casing), and also has no
505 -- effect if an explicit Link_Name is supplied (a link name is always
506 -- used exactly as given).
508 External_Unit_Compilation_Allowed : Boolean := False;
510 -- When True (set by gnatmake switch -x), allow compilation of sources
511 -- that are not part of any project file.
513 Fast_Math : Boolean := False;
515 -- Indicates the current setting of Fast_Math mode, as set by the use
516 -- of a Fast_Math pragma (set on by Fast_Math (On)).
518 Float_Format : Character := ' ';
520 -- A non-blank value indicates that a Float_Format pragma has been
521 -- processed, in which case this variable is set to 'I' for IEEE or
522 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
525 Float_Format_Long : Character := ' ';
527 -- A non-blank value indicates that a Long_Float pragma has been
528 -- processed (this pragma is recognized only in OpenVMS versions
529 -- of GNAT), in which case this variable is set to D or G for
530 -- D_Float or G_Float.
532 Force_ALI_Tree_File : Boolean := False;
534 -- Force generation of ALI file even if errors are encountered.
535 -- Also forces generation of tree file if -gnatt is also set.
537 Force_Checking_Of_Elaboration_Flags : Boolean := False;
539 -- True if binding with forced checking of the elaboration flags
542 Force_Compilations : Boolean := False;
543 -- GNATMAKE, GPRMAKE, GPRBUILD
544 -- Set to force recompilations even when the objects are up-to-date.
546 Full_Path_Name_For_Brief_Errors : Boolean := False;
548 -- When True, in Brief_Output mode, each error message line
549 -- will start with the full path name of the source.
550 -- When False, only the file name without directory information
553 Full_List : Boolean := False;
555 -- Set True to generate full source listing with embedded errors
557 Full_List_File_Name : String_Ptr := null;
559 -- Set to file name to generate full source listing to named file (or if
560 -- the name is of the form .xxx, then to name.xxx where name is the source
561 -- file name with extension stripped.
563 Generate_Processed_File : Boolean := False;
565 -- True when switch -gnateG is used. When True, create in a file
566 -- <source>.prep, if the source is preprocessed.
568 Generate_SCO : Boolean := False;
570 -- True when switch -gnateS is used. When True, Source Coverage Obligation
571 -- (SCO) information is generated and output in the ALI file. See unit
572 -- Par_SCO for full details.
574 Generating_Code : Boolean := False;
576 -- True if the frontend finished its work and has called the backend to
577 -- process the tree and generate the object file.
579 Global_Discard_Names : Boolean := False;
581 -- True if a pragma Discard_Names appeared as a configuration pragma for
582 -- the current compilation unit.
584 GNAT_Mode : Boolean := False;
586 -- True if compiling in GNAT system mode (-gnatg switch)
588 HLO_Active : Boolean := False;
590 -- True if High Level Optimizer is activated (-gnatH switch)
592 Identifier_Character_Set : Character;
594 -- This variable indicates the character set to be used for identifiers.
595 -- The possible settings are:
596 -- '1' Latin-5 (ISO-8859-1)
597 -- '2' Latin-5 (ISO-8859-2)
598 -- '3' Latin-5 (ISO-8859-3)
599 -- '4' Latin-5 (ISO-8859-4)
600 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
601 -- '9' Latin-5 (ISO-8859-9)
602 -- 'p' PC (US, IBM page 437)
603 -- '8' PC (European, IBM page 850)
604 -- 'f' Full upper set (all distinct)
605 -- 'n' No upper characters (Ada 83 rules)
606 -- 'w' Latin-1 plus wide characters allowed in identifiers
608 -- The setting affects the set of letters allowed in identifiers and the
609 -- upper/lower case equivalences. It does not affect the interpretation of
610 -- character and string literals, which are always stored using the actual
611 -- coding in the source program. This variable is initialized to the
612 -- default value appropriate to the system (in Osint.Initialize), and then
613 -- reset if a command line switch is used to change the setting.
615 Ignore_Rep_Clauses : Boolean := False;
617 -- Set True to ignore all representation clauses. Useful when compiling
618 -- code from foreign compilers for checking or ASIS purposes. Can be
619 -- set True by use of -gnatI.
621 Implementation_Unit_Warnings : Boolean := True;
623 -- Set True to active warnings for use of implementation internal units.
624 -- Can be controlled by use of -gnatwi/-gnatwI.
626 Implicit_Packing : Boolean := False;
628 -- If set True, then a Size attribute clause on an array is allowed to
629 -- cause implicit packing instead of generating an error message. Set by
630 -- use of pragma Implicit_Packing.
632 Ineffective_Inline_Warnings : Boolean := False;
634 -- Set True to activate warnings if front-end inlining (-gnatN) is not
635 -- able to actually inline a particular call (or all calls). Can be
636 -- controlled by use of -gnatwp/-gnatwP.
638 Init_Or_Norm_Scalars : Boolean := False;
640 -- Set True if a pragma Initialize_Scalars applies to the current unit.
641 -- Also set True if a pragma Normalize_Scalars applies.
643 Initialize_Scalars : Boolean := False;
645 -- Set True if a pragma Initialize_Scalars applies to the current unit.
646 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
648 Initialize_Scalars_Mode1 : Character := 'I';
649 Initialize_Scalars_Mode2 : Character := 'N';
651 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
652 -- is IN (invalid values), used if no -S switch is used.
654 Inline_Active : Boolean := False;
656 -- Set True to activate pragma Inline processing across modules. Default
657 -- for now is not to inline across module boundaries.
659 Interface_Library_Unit : Boolean := False;
661 -- Set to True to indicate that at least one ALI file is an interface ALI:
662 -- then elaboration flag checks are to be generated in the binder
665 Generate_SCIL : Boolean := False;
667 -- Set True to activate SCIL code generation.
669 Invalid_Value_Used : Boolean := False;
671 -- Set True if a valid Invalid_Value attribute is encountered
673 Follow_Links_For_Files : Boolean := False;
675 -- Set to True (-eL) to process the project files in trusted mode. If
676 -- Follow_Links is False, it is assumed that the project doesn't contain
677 -- any file duplicated through symbolic links (although the latter are
678 -- still valid if they point to a file which is outside of the project),
679 -- and that no directory has a name which is a valid source name.
681 Follow_Links_For_Dirs : Boolean := False;
683 -- Set to True if directories can be links in this project, and therefore
684 -- additional system calls must be performed to ensure that we always see
685 -- the same full name for each directory.
687 Front_End_Inlining : Boolean := False;
689 -- Set True to activate inlining by front-end expansion
691 Inline_Processing_Required : Boolean := False;
693 -- Set True if inline processing is required. Inline processing is required
694 -- if an active Inline pragma is processed. The flag is set for a pragma
695 -- Inline or Inline_Always that is actually active.
697 In_Place_Mode : Boolean := False;
699 -- Set True to store ALI and object files in place i.e. in the object
700 -- directory if these files already exist or in the source directory
703 Keep_Going : Boolean := False;
704 -- GNATMAKE, GPRMAKE, GPRBUILD
705 -- When True signals to ignore compilation errors and keep processing
706 -- sources until there is no more work.
708 Keep_Temporary_Files : Boolean := False;
710 -- When True the temporary files created by the GNAT driver are not
711 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
713 Leap_Seconds_Support : Boolean := False;
715 -- Set to True to enable leap seconds support in Ada.Calendar and its
718 Link_Only : Boolean := False;
719 -- GNATMAKE, GPRMAKE, GPRBUILD
720 -- Set to True to skip compile and bind steps (except when Bind_Only is
723 List_Restrictions : Boolean := False;
725 -- Set to True to list restrictions pragmas that could apply to partition
727 List_Units : Boolean := False;
729 -- List units in the active library for a compilation (-gnatu switch)
731 List_Closure : Boolean := False;
733 -- List all sources in the closure of a main (-R gnatbind switch)
735 List_Dependencies : Boolean := False;
737 -- When True gnatmake verifies that the objects are up to date and
738 -- outputs the list of object dependencies (-M switch).
739 -- Output depends if -a switch is used or not.
740 -- This list can be used directly in a Makefile.
742 List_Representation_Info : Int range 0 .. 3 := 0;
744 -- Set non-zero by -gnatR switch to list representation information.
745 -- The settings are as follows:
747 -- 0 = no listing of representation information (default as above)
748 -- 1 = list rep info for user defined record and array types
749 -- 2 = list rep info for all user defined types and objects
750 -- 3 = like 2, but variable fields are decoded symbolically
752 List_Representation_Info_To_File : Boolean := False;
754 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3 to be
755 -- written to file.rep (where file is the name of the source file) instead
756 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then
757 -- representation info is written to x.adb.ref.
759 List_Representation_Info_Mechanisms : Boolean := False;
761 -- Set true by -gnatRm switch. Causes information on mechanisms to be
762 -- included in the representation output information.
764 List_Preprocessing_Symbols : Boolean := False;
766 -- Set to True if symbols for preprocessing a source are to be listed
767 -- before preprocessing occurs. Set to True by switch -s of gnatprep or
768 -- -s in preprocessing data file for the compiler.
770 type Create_Repinfo_File_Proc is access procedure (Src : String);
771 type Write_Repinfo_Line_Proc is access procedure (Info : String);
772 type Close_Repinfo_File_Proc is access procedure;
773 -- Types used for procedure addresses below
775 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
776 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
777 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
779 -- These three locations are left null when operating in non-compiler (e.g.
780 -- ASIS mode), but when operating in compiler mode, they are set to point
781 -- to the three corresponding procedures in Osint-C. The reason for this
782 -- slightly strange interface is to stop Repinfo from dragging in Osint in
783 -- ASIS mode, which would include lots of unwanted units in the ASIS build.
785 type Create_List_File_Proc is access procedure (S : String);
786 type Write_List_Info_Proc is access procedure (S : String);
787 type Close_List_File_Proc is access procedure;
788 -- Types used for procedure addresses below
790 Create_List_File_Access : Create_List_File_Proc := null;
791 Write_List_Info_Access : Write_List_Info_Proc := null;
792 Close_List_File_Access : Close_List_File_Proc := null;
794 -- These three locations are left null when operating in non-compiler
795 -- (e.g. from the binder), but when operating in compiler mode, they are
796 -- set to point to the three corresponding procedures in Osint-C. The
797 -- reason for this slightly strange interface is to prevent Repinfo
798 -- from dragging in Osint-C in the binder, which would include unwanted
799 -- units in the binder.
801 Locking_Policy : Character := ' ';
803 -- Set to ' ' for the default case (no locking policy specified). Reset to
804 -- first character (uppercase) of locking policy name if a valid pragma
805 -- Locking_Policy is encountered.
807 Locking_Policy_Sloc : Source_Ptr := No_Location;
809 -- Remember location of previous Locking_Policy pragma. This is used for
810 -- inconsistency error messages. A value of System_Location is used if the
811 -- policy is set in package System.
813 Look_In_Primary_Dir : Boolean := True;
814 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
815 -- Set to False if a -I- was present on the command line. When True we are
816 -- allowed to look in the primary directory to locate other source or
819 Make_Steps : Boolean := False;
821 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
824 Main_Index : Int := 0;
826 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
827 -- the main program is the nnn unit in a multi-unit source file.
829 Mapping_File_Name : String_Ptr := null;
831 -- File name of mapping between unit names, file names and path names.
832 -- (given by switch -gnatem)
834 Maximum_Messages : Int := 9999;
836 -- Maximum default number of errors before compilation is terminated, or in
837 -- the case of GNAT, maximum number of warnings before further warnings are
838 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch.
840 Maximum_File_Name_Length : Int;
842 -- Maximum number of characters allowed in a file name, not counting the
843 -- extension, as set by the appropriate switch. If no switch is given,
844 -- then this value is initialized by Osint to the appropriate value.
846 Maximum_Processes : Positive := 1;
847 -- GNATMAKE, GPRMAKE, GPRBUILD
848 -- Maximum number of processes that should be spawned to carry out
851 Minimal_Recompilation : Boolean := False;
853 -- Set to True if minimal recompilation mode requested
855 Special_Exception_Package_Used : Boolean := False;
857 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
858 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
859 -- local raise statements into gotos in the presence of either package.
861 Multiple_Unit_Index : Int;
863 -- This is set non-zero if the current unit is being compiled in multiple
864 -- unit per file mode, meaning that the current unit is selected from the
865 -- sequence of units in the current source file, using the value stored
866 -- in this variable (e.g. 2 = select second unit in file). A value of
867 -- zero indicates that we are in normal (one unit per file) mode.
869 No_Main_Subprogram : Boolean := False;
870 -- GNATMAKE, GNATBIND
871 -- Set to True if compilation/binding of a program without main
872 -- subprogram requested.
874 No_Run_Time_Mode : Boolean := False;
876 -- This flag is set True if a No_Run_Time pragma is encountered. See
877 -- spec of Rtsfind for a full description of handling of this pragma.
879 No_Split_Units : Boolean := False;
881 -- Set to True with switch --no-split-units. When True, unit sources, spec,
882 -- body and subunits, must all be in the same project.This is checked after
885 No_Stdinc : Boolean := False;
886 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
887 -- Set to True if no default source search dirs added to search list
889 No_Stdlib : Boolean := False;
890 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
891 -- Set to True if no default library search dirs added to search list
893 No_Strict_Aliasing : Boolean := False;
895 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
897 Normalize_Scalars : Boolean := False;
899 -- Set True if a pragma Normalize_Scalars applies to the current unit.
900 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
902 Object_Directory_Present : Boolean := False;
904 -- Set to True when an object directory is specified with option -D
906 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
907 Operating_Mode : Operating_Mode_Type := Generate_Code;
909 -- Indicates the operating mode of the compiler. The default is generate
910 -- code, which runs the parser, semantics and backend. Switches can be
911 -- used to set syntax checking only mode, or syntax and semantics checking
912 -- only mode. Operating_Mode can also be modified as a result of detecting
913 -- errors during the compilation process. In particular if any serious
914 -- error is detected then this flag is reset from Generate_Code to
915 -- Check_Semantics after generating an error message.
917 Optimize_Alignment : Character := 'O';
918 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can
919 -- be modified by use of pragma Optimize_Alignment.
921 Optimize_Alignment_Local : Boolean := False;
922 -- Set True if Optimize_Alignment mode is set by a local configuration
923 -- pragma that overrides the gnat.adc (or other configuration file) default
924 -- so that the unit is not dependent on the default setting. Also always
925 -- set True for internal units, since these always have a default setting
926 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to
927 -- them all having such an explicit pragma in each unit).
929 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
931 -- Indicates the original operating mode of the compiler as set by compiler
932 -- options. This is identical to Operating_Mode except that this is not
933 -- affected by errors.
935 Optimization_Level : Int;
936 pragma Import (C, Optimization_Level, "optimize");
937 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
938 -- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and
942 pragma Import (C, Optimize_Size, "optimize_size");
943 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero
944 -- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c
945 -- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends
947 Output_File_Name_Present : Boolean := False;
948 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
949 -- Set to True when the output C file name is given with option -o for
950 -- GNATBIND, when the object file name is given with option -gnatO for GNAT
951 -- or when the executable is given with option -o for GNATMAKE or GPRMAKE.
953 Output_Linker_Option_List : Boolean := False;
955 -- True if output of list of linker options is requested (-K switch set)
957 Output_ALI_List : Boolean := False;
958 ALI_List_Filename : String_Ptr;
960 -- True if output of list of ALIs is requested (-A switch set). List is
961 -- output under the given filename, or standard output if not specified.
963 Output_Object_List : Boolean := False;
964 Object_List_Filename : String_Ptr;
966 -- True if output of list of objects is requested (-O switch set). List is
967 -- output under the given filename, or standard output if not specified.
969 Overflow_Checks_Unsuppressed : Boolean := False;
971 -- Set to True if at least one occurrence of pragma Unsuppress
972 -- (All_Checks|Overflow_Checks) has been processed.
974 Persistent_BSS_Mode : Boolean := False;
976 -- True if a Persistent_BSS configuration pragma is in effect, causing
977 -- potentially persistent data to be placed in the persistent_bss section.
979 Pessimistic_Elab_Order : Boolean := False;
981 -- True if pessimistic elaboration order is to be chosen (-p switch set)
983 Polling_Required : Boolean := False;
985 -- Set to True if polling for asynchronous abort is enabled by using
986 -- the -gnatP option for GNAT.
988 Preprocessing_Data_File : String_Ptr := null;
990 -- Set by switch -gnatep=. The file name of the preprocessing data file.
992 Print_Generated_Code : Boolean := False;
994 -- Set to True to enable output of generated code in source form. This
995 -- flag is set by the -gnatG switch.
997 Print_Standard : Boolean := False;
999 -- Set to true to enable printing of package standard in source form.
1000 -- This flag is set by the -gnatS switch
1002 Propagate_Exceptions : Boolean := False;
1004 -- Indicates if subprogram descriptor exception tables should be
1005 -- built for imported subprograms. Set True if a Propagate_Exceptions
1006 -- pragma applies to the extended main unit.
1008 type Usage is (Unknown, Not_In_Use, In_Use);
1009 Project_File_In_Use : Usage := Unknown;
1011 -- Indicates if a project file is used or not. Set to In_Use by the first
1014 Queuing_Policy : Character := ' ';
1016 -- Set to ' ' for the default case (no queuing policy specified). Reset to
1017 -- first character (uppercase) of locking policy name if a valid
1018 -- Queuing_Policy pragma is encountered.
1020 Queuing_Policy_Sloc : Source_Ptr := No_Location;
1022 -- Remember location of previous Queuing_Policy pragma. This is used for
1023 -- inconsistency error messages. A value of System_Location is used if the
1024 -- policy is set in package System.
1026 Quiet_Output : Boolean := False;
1027 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN
1028 -- Set to True if the tool should not have any output if there are no
1029 -- errors or warnings.
1031 Replace_In_Comments : Boolean := False;
1033 -- Set to True if -C switch used
1035 RTS_Lib_Path_Name : String_Ptr := null;
1036 RTS_Src_Path_Name : String_Ptr := null;
1038 -- Set to the "adalib" and "adainclude" directories of the run time
1039 -- specified by --RTS=.
1041 RTS_Switch : Boolean := False;
1042 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
1043 -- Set to True when the --RTS switch is set
1045 Run_Path_Option : Boolean := True;
1046 -- GNATMAKE, GNATLINK
1047 -- Set to False when no run_path_option should be issued to the linker
1049 Search_Directory_Present : Boolean := False;
1051 -- Set to True when argument is -I. Reset to False when next argument, a
1052 -- search directory path is taken into account. Note that this is quite
1053 -- different from other switches in this section in that it is only set in
1054 -- a transitory manner as a result of scanning a -I switch with no file
1055 -- name, and if set, is an indication that the next argument is to be
1056 -- treated as a file name.
1058 Sec_Stack_Used : Boolean := False;
1060 -- Set True if generated code uses the System.Secondary_Stack package. For
1061 -- the binder, set if any unit uses the secondary stack package.
1063 Setup_Projects : Boolean := False;
1065 -- Set to True for GNAT SETUP: the Project Manager creates non existing
1066 -- object, library and exec directories.
1068 Shared_Libgnat : Boolean;
1070 -- Set to True if a shared libgnat is requested by using the -shared option
1071 -- for GNATBIND and to False when using the -static option. The value of
1072 -- this flag is set by Gnatbind.Scan_Bind_Arg.
1074 Short_Circuit_And_Or : Boolean := False;
1076 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit.
1078 Sprint_Line_Limit : Nat := 72;
1079 -- Limit values for chopping long lines in Sprint output, can be reset
1080 -- by use of NNN parameter with -gnatG or -gnatD switches.
1082 Stack_Checking_Enabled : Boolean;
1084 -- Set to indicate if -fstack-check switch is set for the compilation. True
1085 -- means that the switch is set, so that stack checking is enabled. False
1086 -- means that the switch is not set (no stack checking). This value is
1087 -- obtained from the external imported value flag_stack_check in the gcc
1088 -- backend (see Frontend) and may be referenced throughout the compilation
1091 Style_Check : Boolean := False;
1093 -- Set True to perform style checks. Activates checks carried out in
1094 -- package Style (see body of this package for details of checks) This
1095 -- flag is set True by either the -gnatg or -gnaty switches.
1097 Suppress_All_Inlining : Boolean := False;
1099 -- Set by -fno-inline. Suppresses all inlining, both front end and back end
1100 -- regardless of any other switches that are set.
1102 Suppress_Control_Flow_Optimizations : Boolean := False;
1104 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations
1105 -- that interfere with coverage analysis based on the object code.
1107 System_Extend_Pragma_Arg : Node_Id := Empty;
1109 -- Set non-empty if and only if a correct Extend_System pragma was present
1110 -- in which case it points to the argument of the pragma, and the name can
1111 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
1113 System_Extend_Unit : Node_Id := Empty;
1115 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
1116 -- is never appropriate in GNAT_Mode (and causes troubles, including
1117 -- bogus circularities, if we try to compile the run-time library with
1118 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
1119 -- is a copy of the value set in System_Extend_Pragma_Arg.
1121 Subunits_Missing : Boolean := False;
1123 -- This flag is set true if missing subunits are detected with code
1124 -- generation active. This causes code generation to be skipped.
1126 Suppress_Checks : Boolean := False;
1128 -- Set to True if -gnatp (suppress all checks) switch present.
1130 Suppress_Options : Suppress_Array;
1132 -- Flags set True to suppress corresponding check, i.e. add an implicit
1133 -- pragma Suppress at the outer level of each unit compiled. Note that
1134 -- these suppress actions can be overridden by the use of the Unsuppress
1135 -- pragma. This variable is initialized by Osint.Initialize.
1137 Suppress_Back_Annotation : Boolean := False;
1139 -- This flag is set True if back annotation of representation information
1140 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
1141 -- This avoids unnecessary time being spent on back annotation.
1143 Table_Factor : Int := 1;
1145 -- Factor by which all initial table sizes set in Alloc are multiplied.
1146 -- Used in Table to calculate initial table sizes (the initial table size
1147 -- is the value in Alloc, used as the Table_Initial parameter value,
1148 -- multiplied by the factor given here. The default value is used if no
1149 -- -gnatT switch appears.
1151 Tagged_Type_Expansion : Boolean := True;
1153 -- Set True if tagged types and interfaces should be expanded by the
1154 -- front-end. If False, the original tree is left unexpanded for tagged
1155 -- types and dispatching calls, assuming the underlying target supports
1156 -- it (e.g. in the JVM case).
1158 Task_Dispatching_Policy : Character := ' ';
1160 -- Set to ' ' for the default case (no task dispatching policy specified).
1161 -- Reset to first character (uppercase) of task dispatching policy name
1162 -- if a valid Task_Dispatching_Policy pragma is encountered.
1164 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
1166 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1167 -- used for inconsistency error messages. A value of System_Location is
1168 -- used if the policy is set in package System.
1170 Tasking_Used : Boolean := False;
1171 -- Set True if any tasking construct is encountered. Used to activate the
1172 -- output of the Q, L and T lines in ALI files.
1174 Time_Slice_Set : Boolean := False;
1176 -- Set True if a pragma Time_Slice is processed in the main unit, or
1177 -- if the -gnatTnn switch is present to set a time slice value.
1179 Time_Slice_Value : Nat;
1181 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1182 -- Time_Slice pragma has been processed. Set to the time slice value in
1183 -- microseconds. Negative values are stored as zero, and the value is not
1184 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1185 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1187 Tolerate_Consistency_Errors : Boolean := False;
1189 -- Tolerate time stamp and other consistency errors. If this flag is set to
1190 -- True (-t), then inconsistencies result in warnings rather than errors.
1192 Treat_Restrictions_As_Warnings : Boolean := False;
1194 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
1197 Tree_Output : Boolean := False;
1199 -- Set to True (-gnatt) to generate output tree file
1201 True_VMS_Target : Boolean := False;
1202 -- Set True if we are on a VMS target. The setting of this flag reflects
1203 -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which
1204 -- can also be true when debug flag m is set (-gnatdm). This is used in the
1205 -- few cases where we do NOT want -gnatdm to trigger the VMS behavior.
1207 Try_Semantics : Boolean := False;
1209 -- Flag set to force attempt at semantic analysis, even if parser errors
1210 -- occur. This will probably cause blowups at this stage in the game. On
1211 -- the other hand, most such blowups will be caught cleanly and simply
1212 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
1214 Unchecked_Shared_Lib_Imports : Boolean := False;
1216 -- Set to True when shared library projects are allowed to import projects
1217 -- that are not shared library projects. Set by switch
1218 -- --unchecked-shared-lib-imports.
1220 Undefined_Symbols_Are_False : Boolean := False;
1222 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1223 -- file for the compiler. Indicates that while preprocessing sources,
1224 -- symbols that are not defined have the value FALSE.
1226 Unique_Error_Tag : Boolean := Tag_Errors;
1228 -- Indicates if error messages are to be prefixed by the string error:
1229 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1231 Universal_Addressing_On_AAMP : Boolean := False;
1233 -- Indicates if library-level objects should be accessed and updated using
1234 -- universal addressing instructions on the AAMP architecture. This flag is
1235 -- set to True when pragma Universal_Data is given as a configuration
1238 Unreserve_All_Interrupts : Boolean := False;
1240 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1241 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1242 -- corresponding attribute set in GNATBIND.
1244 Upper_Half_Encoding : Boolean := False;
1246 -- Normally set False, indicating that upper half ISO 8859-1 characters are
1247 -- used in the normal way to represent themselves. If the wide character
1248 -- encoding method uses the upper bit for this encoding, then this flag is
1249 -- set True, and upper half characters in the source indicate the start of
1250 -- a wide character sequence. Set by -gnatW or -W switches.
1252 Use_Include_Path_File : Boolean := False;
1253 -- GNATMAKE, GPRBUILD
1254 -- When True, create a source search path file, even when a mapping file
1257 Usage_Requested : Boolean := False;
1258 -- GNAT, GNATBIND, GNATMAKE
1259 -- Set to True if -h (-gnath for the compiler) switch encountered
1260 -- requesting usage information
1262 Use_Expression_With_Actions : Boolean;
1263 -- The N_Expression_With_Actions node has been introduced relatively
1264 -- recently, and not all back ends are prepared to handle it yet. So
1265 -- we use this flag to suppress its use during a transitional period.
1266 -- Currently the default is False for all cases (set in gnat1drv).
1267 -- The default can be modified using -gnatd.X/-gnatd.Y.
1269 Use_Pragma_Linker_Constructor : Boolean := False;
1271 -- True if pragma Linker_Constructor applies to adainit
1273 Use_VADS_Size : Boolean := False;
1275 -- Set to True if a valid pragma Use_VADS_Size is processed
1277 Validity_Checks_On : Boolean := True;
1279 -- This flag determines if validity checking is on or off. The initial
1280 -- state is on, and the required default validity checks are active. The
1281 -- actual set of checks that is performed if Validity_Checks_On is set is
1282 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1283 -- is controlled by pragma Validity_Checks (On | Off), and also some
1284 -- generated compiler code (typically code that has to do with validity
1285 -- check generation) is compiled with this flag set to False. This flag is
1286 -- set to False by the -gnatp switch.
1288 Verbose_Mode : Boolean := False;
1289 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1290 -- GPRMAKE, GPRBUILD, GPRCLEAN
1291 -- Set to True to get verbose mode (full error message text and location
1292 -- information sent to standard output, also header, copyright and summary)
1294 type Verbosity_Level_Type is (None, Low, Medium, High);
1295 Verbosity_Level : Verbosity_Level_Type := High;
1296 -- GNATMAKE, GPRMAKE
1297 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1298 -- the level of verbosity of informational messages:
1300 -- In Low Verbosity, the reasons why a source is recompiled, the name
1301 -- of the executable and the reason it must be rebuilt is output.
1303 -- In Medium Verbosity, additional lines are output for each ALI file
1306 -- In High Verbosity, additional lines are output when the ALI file
1307 -- is part of an Ada library, is read-only or is part of the runtime.
1309 Warn_On_Ada_2005_Compatibility : Boolean := True;
1311 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1312 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1313 -- mode. Set False by -gnatwY.
1315 Warn_On_Parameter_Order : Boolean := False;
1317 -- Set to True to generate warnings for cases where the argument list for
1318 -- a call is a sequence of identifiers that match the formal identifiers,
1319 -- but are in the wrong order.
1321 Warn_On_Assertion_Failure : Boolean := True;
1323 -- Set to True to activate warnings on assertions that can be determined
1324 -- at compile time will always fail. Set false by -gnatw.A.
1326 Warn_On_Assumed_Low_Bound : Boolean := True;
1328 -- Set to True to activate warnings for string parameters that are indexed
1329 -- with literals or S'Length, presumably assuming a lower bound of one. Set
1330 -- False by -gnatwW.
1332 Warn_On_Bad_Fixed_Value : Boolean := False;
1334 -- Set to True to generate warnings for static fixed-point expression
1335 -- values that are not an exact multiple of the small value of the type.
1337 Warn_On_Biased_Representation : Boolean := True;
1339 -- Set to True to generate warnings for size clauses, component clauses
1340 -- and component_size clauses that force biased representation. Set False
1343 Warn_On_Constant : Boolean := False;
1345 -- Set to True to generate warnings for variables that could be declared
1346 -- as constants. Modified by use of -gnatwk/K.
1348 Warn_On_Deleted_Code : Boolean := False;
1350 -- Set to True to generate warnings for code deleted by the front end
1351 -- for conditional statements whose outcome is known at compile time.
1352 -- Modified by use of -gnatwt/T.
1354 Warn_On_Dereference : Boolean := False;
1356 -- Set to True to generate warnings for implicit dereferences for array
1357 -- indexing and record component access. Modified by use of -gnatwd/D.
1359 Warn_On_Export_Import : Boolean := True;
1361 -- Set to True to generate warnings for suspicious use of export or
1362 -- import pragmas. Modified by use of -gnatwx/X.
1364 Warn_On_Hiding : Boolean := False;
1366 -- Set to True to generate warnings if a declared entity hides another
1367 -- entity. The default is that this warning is suppressed.
1369 Warn_On_Modified_Unread : Boolean := False;
1371 -- Set to True to generate warnings if a variable is assigned but is never
1372 -- read. Also controls warnings for similar cases involving out parameters,
1373 -- but only if there is only one out parameter for the procedure involved.
1374 -- The default is that this warning is suppressed.
1376 Warn_On_All_Unread_Out_Parameters : Boolean := False;
1378 -- Set to True to generate warnings in all cases where a variable is
1379 -- modified by being passed as to an OUT formal, but the resulting value is
1380 -- never read. The default is that this warning is suppressed, except in
1383 Warn_On_No_Value_Assigned : Boolean := True;
1385 -- Set to True to generate warnings if no value is ever assigned to a
1386 -- variable that is at least partially uninitialized. Set to false to
1387 -- suppress such warnings. The default is that such warnings are enabled.
1389 Warn_On_Non_Local_Exception : Boolean := False;
1391 -- Set to True to generate warnings for non-local exception raises and also
1392 -- handlers that can never handle a local raise. This warning is only ever
1393 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1394 -- default is not to generate the warnings except that if the source has
1395 -- at least one exception handler, and this restriction is set, and the
1396 -- warning was not explicitly turned off, then it is turned on by default.
1398 No_Warn_On_Non_Local_Exception : Boolean := False;
1400 -- This is set to True if the above warning is explicitly suppressed. We
1401 -- use this to avoid turning it on by default when No_Exception_Propagation
1402 -- restriction is set and an exception handler is present.
1404 Warn_On_Obsolescent_Feature : Boolean := False;
1406 -- Set to True to generate warnings on use of any feature in Annex or if a
1407 -- subprogram is called for which a pragma Obsolescent applies.
1409 Warn_On_Overlap : Boolean := False;
1411 -- Set to True to generate warnings when a writable actual which is not
1412 -- a by-copy type overlaps with another actual in a subprogram call.
1414 Warn_On_Questionable_Missing_Parens : Boolean := True;
1416 -- Set to True to generate warnings for cases where parentheses are missing
1417 -- and the usage is questionable, because the intent is unclear.
1419 Warn_On_Redundant_Constructs : Boolean := False;
1421 -- Set to True to generate warnings for redundant constructs (e.g. useless
1422 -- assignments/conversions). The default is that this warning is disabled.
1424 Warn_On_Object_Renames_Function : Boolean := False;
1426 -- Set to True to generate warnings when a function result is renamed as
1427 -- an object. The default is that this warning is disabled.
1429 Warn_On_Reverse_Bit_Order : Boolean := True;
1431 -- Set to True to generate warning (informational) messages for component
1432 -- clauses that are affected by non-standard bit-order. The default is
1433 -- that this warning is enabled.
1435 Warn_On_Suspicious_Modulus_Value : Boolean := True;
1437 -- Set to True to generate warnings for suspicious modulus values. The
1438 -- default is that this warning is enabled.
1440 Warn_On_Unchecked_Conversion : Boolean := True;
1442 -- Set to True to generate warnings for unchecked conversions that may have
1443 -- non-portable semantics (e.g. because sizes of types differ). The default
1444 -- is that this warning is enabled.
1446 Warn_On_Unrecognized_Pragma : Boolean := True;
1448 -- Set to True to generate warnings for unrecognized pragmas. The default
1449 -- is that this warning is enabled.
1451 Warn_On_Unrepped_Components : Boolean := False;
1453 -- Set to True to generate warnings for the case of components of record
1454 -- which have a record representation clause but this component does not
1455 -- have a component clause. The default is that this warning is disabled.
1457 Warn_On_Warnings_Off : Boolean := False;
1459 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent),
1460 -- where either the pragma is never used, or it could be replaced by a
1461 -- pragma Unmodified or Unreferenced.
1463 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1464 Warning_Mode : Warning_Mode_Type := Normal;
1466 -- Controls treatment of warning messages. If set to Suppress, warning
1467 -- messages are not generated at all. In Normal mode, they are generated
1468 -- but do not count as errors. In Treat_As_Error mode, warning messages
1469 -- are generated and are treated as errors.
1471 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1473 -- Method used for encoding wide characters in the source program. See
1474 -- description of type in unit System.WCh_Con for a list of the methods
1475 -- that are currently supported. Note that brackets notation is always
1476 -- recognized in source programs regardless of the setting of this
1477 -- variable. The default setting causes only the brackets notation to be
1478 -- recognized. If this is the main unit, this setting also controls the
1479 -- output of the W=? parameter in the ALI file, which is used to provide
1480 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder,
1481 -- the value set here overrides this main unit default.
1483 Wide_Character_Encoding_Method_Specified : Boolean := False;
1485 -- Set True if the value in Wide_Character_Encoding_Method was set as
1486 -- a result of an explicit -gnatW? or -W? switch. False otherwise.
1488 Xref_Active : Boolean := True;
1490 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1492 Zero_Formatting : Boolean := False;
1494 -- Do no formatting (no title, no leading spaces, no empty lines) in
1495 -- auxiliary outputs (-e, -K, -l, -R).
1497 ----------------------------
1498 -- Configuration Settings --
1499 ----------------------------
1501 -- These are settings that are used to establish the mode at the start of
1502 -- each unit. The values defined below can be affected either by command
1503 -- line switches, or by the use of appropriate configuration pragmas in a
1504 -- configuration pragma file.
1506 Ada_Version_Config : Ada_Version_Type;
1508 -- This is the value of the configuration switch for the Ada 83 mode, as
1509 -- set by the command line switches -gnat83/95/05, and possibly modified by
1510 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1511 -- to set the initial value for Ada_Version mode at the start of analysis
1512 -- of a unit. Note however, that the setting of this flag is ignored for
1513 -- internal and predefined units (which are always compiled in the most up
1514 -- to date version of Ada).
1516 Ada_Version_Explicit_Config : Ada_Version_Type;
1518 -- This is set in the same manner as Ada_Version_Config. The difference is
1519 -- that the setting of this flag is not ignored for internal and predefined
1520 -- units, which for some purposes do indeed access this value, regardless
1521 -- of the fact that they are compiled the most up to date ada version).
1523 Assertions_Enabled_Config : Boolean;
1525 -- This is the value of the configuration switch for assertions enabled
1526 -- mode, as possibly set by the command line switch -gnata, and possibly
1527 -- modified by the use of the configuration pragma Assertion_Policy.
1529 Assume_No_Invalid_Values_Config : Boolean;
1531 -- This is the value of the configuration switch for assuming "no invalid
1532 -- values enabled" mode, as possibly set by the command line switch
1533 -- -gnatB, and possibly modified by the use of the configuration pragma
1534 -- Assume_No_Invalid_Values.
1536 Check_Policy_List_Config : Node_Id;
1538 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
1539 -- that are linked through the Next_Pragma fields, with the list being
1540 -- terminated by Empty. The order is most recently processed first. This
1541 -- list includes only those pragmas in configuration pragma files.
1543 Debug_Pragmas_Enabled_Config : Boolean;
1545 -- This is the value of the configuration switch for debug pragmas enabled
1546 -- mode, as possibly set by the command line switch -gnata and possibly
1547 -- modified by the use of the configuration pragma Debug_Policy.
1549 Dynamic_Elaboration_Checks_Config : Boolean := False;
1551 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1552 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1554 Exception_Locations_Suppressed_Config : Boolean := False;
1556 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1558 Extensions_Allowed_Config : Boolean;
1560 -- This is the flag that indicates whether extensions are allowed. It can
1561 -- be set True either by use of the -gnatX switch, or by use of the
1562 -- configuration pragma Extensions_Allowed (On). It is always set to True
1563 -- for internal GNAT units, since extensions are always permitted in such
1566 External_Name_Exp_Casing_Config : External_Casing_Type;
1568 -- This is the value of the configuration switch that controls casing of
1569 -- external symbols for which an explicit external name is given. It can be
1570 -- set to Uppercase by the command line switch -gnatF, and further modified
1571 -- by the use of the configuration pragma External_Name_Casing in the
1572 -- gnat.adc file. This flag is used to set the initial value for
1573 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1574 -- however that the setting of this flag is ignored for internal and
1575 -- predefined units (which are always compiled with As_Is mode).
1577 External_Name_Imp_Casing_Config : External_Casing_Type;
1579 -- This is the value of the configuration switch that controls casing of
1580 -- external symbols where the external name is implicitly given. It can be
1581 -- set to Uppercase by the command line switch -gnatF, and further modified
1582 -- by the use of the configuration pragma External_Name_Casing in the
1583 -- gnat.adc file. This flag is used to set the initial value for
1584 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1585 -- however that the setting of this flag is ignored for internal and
1586 -- predefined units (which are always compiled with Lowercase mode).
1588 Fast_Math_Config : Boolean;
1590 -- This is the value of the configuration switch that controls Fast_Math
1591 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is
1592 -- used to set the initial value of Fast_Math at the start of each new
1593 -- compilation unit.
1595 Init_Or_Norm_Scalars_Config : Boolean;
1597 -- This is the value of the configuration switch that is set by one
1598 -- of the pragmas Initialize_Scalars or Normalize_Scalars.
1600 Initialize_Scalars_Config : Boolean;
1602 -- This is the value of the configuration switch that is set by the
1603 -- pragma Initialize_Scalars when it appears in the gnat.adc file.
1604 -- This switch is not set when the pragma appears ahead of a given
1605 -- unit, so it does not affect the compilation of other units.
1607 Optimize_Alignment_Config : Character;
1609 -- This is the value of the configuration switch that controls the
1610 -- alignment optimization mode, as set by an Optimize_Alignment pragma.
1611 -- It is used to set the initial value of Optimize_Alignment at the start
1612 -- of each new compilation unit, except that it is always set to 'O' (off)
1613 -- for internal units.
1615 Persistent_BSS_Mode_Config : Boolean;
1617 -- This is the value of the configuration switch that controls whether
1618 -- potentially persistent data is to be placed in the persistent_bss
1619 -- section. It can be set True by use of the pragma Persistent_BSS.
1620 -- This flag is used to set the initial value of Persistent_BSS_Mode
1621 -- at the start of each compilation unit, except that it is always
1622 -- set False for predefined units.
1624 Polling_Required_Config : Boolean;
1626 -- This is the value of the configuration switch that controls polling
1627 -- mode. It can be set True by the command line switch -gnatP, and then
1628 -- further modified by the use of pragma Polling in the gnat.adc file. This
1629 -- flag is used to set the initial value for Polling_Required at the start
1630 -- of analyzing each unit.
1632 Use_VADS_Size_Config : Boolean;
1634 -- This is the value of the configuration switch that controls the use of
1635 -- VADS_Size instead of Size wherever the attribute Size is used. It can
1636 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1637 -- This flag is used to set the initial value for Use_VADS_Size at the
1638 -- start of analyzing each unit. Note however that the setting of this flag
1639 -- is ignored for internal and predefined units (which are always compiled
1640 -- with the standard Size semantics).
1642 type Config_Switches_Type is private;
1643 -- Type used to save values of the switches set from Config values
1645 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1646 -- This procedure saves the current values of the switches which are
1647 -- initialized from the above Config values, and then resets these switches
1648 -- according to the Config value settings.
1650 procedure Set_Opt_Config_Switches
1651 (Internal_Unit : Boolean;
1652 Main_Unit : Boolean);
1653 -- This procedure sets the switches to the appropriate initial values. The
1654 -- parameter Internal_Unit is True for an internal or predefined unit, and
1655 -- affects the way the switches are set (see above). Main_Unit is true if
1656 -- switches are being set for the main unit (this affects setting of the
1657 -- assert/debug pragma switches, which are normally set false by default
1658 -- for an internal unit, except when the internal unit is the main unit,
1659 -- in which case we use the command line settings).
1661 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1662 -- This procedure restores a set of switch values previously saved by a
1663 -- call to Save_Opt_Switches.
1665 procedure Register_Opt_Config_Switches;
1666 -- This procedure is called after processing the gnat.adc file and other
1667 -- configuration pragma files to record the values of the Config switches,
1668 -- as possibly modified by the use of command line switches and pragmas
1669 -- appearing in these files.
1671 ------------------------
1672 -- Other Global Flags --
1673 ------------------------
1675 Expander_Active : Boolean := False;
1676 -- A flag that indicates if expansion is active (True) or deactivated
1677 -- (False). When expansion is deactivated all calls to expander routines
1678 -- have no effect. Note that the initial setting of False is merely to
1679 -- prevent saving of an undefined value for an initial call to the
1680 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1681 -- this flag, see package Expander. Indeed this flag might more logically
1682 -- be in the spec of Expander, but it is referenced by Errout, and it
1683 -- really seems wrong for Errout to depend on Expander.
1685 Static_Dispatch_Tables : Boolean := True;
1686 -- This flag indicates if the backend supports generation of statically
1687 -- allocated dispatch tables. If it is True, then the front end will
1688 -- generate static aggregates for dispatch tables that contain forward
1689 -- references to addresses of subprograms not seen yet, and the back end
1690 -- must be prepared to handle this case. If it is False, then the front
1691 -- end generates assignments to initialize the dispatch table, and there
1692 -- are no such forward references. By default we build statically allocated
1693 -- dispatch tables for all library level tagged types in all platforms.This
1694 -- behavior can be disabled using switch -gnatd.t which will set this flag
1695 -- to False and revert to the previous dynamic behavior.
1697 -----------------------
1698 -- Tree I/O Routines --
1699 -----------------------
1701 procedure Tree_Read;
1702 -- Reads switch settings from current tree file using Tree_Read
1704 procedure Tree_Write;
1705 -- Writes out switch settings to current tree file using Tree_Write
1707 --------------------------
1708 -- ASIS Version Control --
1709 --------------------------
1711 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1712 -- are supposed to be used in the GNAT/ASIS version check performed in
1713 -- the ASIS code (this package is also a part of the ASIS implementation).
1714 -- They are set by Tree_Read procedure, so they represent the version
1715 -- number (and the version string) of the compiler which has created the
1716 -- tree, and they are supposed to be compared with the corresponding values
1717 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS
1720 Tree_Version_String : String_Access;
1721 -- Used to store the compiler version string read from a tree file to check
1722 -- if it is from the same date as stored in the version string in Gnatvsn.
1723 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1724 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1725 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1726 -- of the corresponding source sets, using version strings that may be
1727 -- of different lengths.
1729 Tree_ASIS_Version_Number : Int;
1730 -- Used to store the ASIS version number read from a tree file to check if
1731 -- it is the same as stored in the ASIS version number in Tree_IO.
1735 -- The following type is used to save and restore settings of switches in
1736 -- Opt that represent the configuration (i.e. result of config pragmas).
1738 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1739 -- flag that once set does not get reset, since the whole idea of this flag
1740 -- is to record the setting for the main unit.
1742 type Config_Switches_Type is record
1743 Ada_Version : Ada_Version_Type;
1744 Ada_Version_Explicit : Ada_Version_Type;
1745 Assertions_Enabled : Boolean;
1746 Assume_No_Invalid_Values : Boolean;
1747 Check_Policy_List : Node_Id;
1748 Debug_Pragmas_Enabled : Boolean;
1749 Dynamic_Elaboration_Checks : Boolean;
1750 Exception_Locations_Suppressed : Boolean;
1751 Extensions_Allowed : Boolean;
1752 External_Name_Exp_Casing : External_Casing_Type;
1753 External_Name_Imp_Casing : External_Casing_Type;
1754 Fast_Math : Boolean;
1755 Init_Or_Norm_Scalars : Boolean;
1756 Initialize_Scalars : Boolean;
1757 Optimize_Alignment : Character;
1758 Optimize_Alignment_Local : Boolean;
1759 Persistent_BSS_Mode : Boolean;
1760 Polling_Required : Boolean;
1761 Use_VADS_Size : Boolean;
1764 -- The following declarations are for GCC version dependent flags. We do
1765 -- not let client code in the compiler test GCC_Version directly, but
1766 -- instead use deferred constants for relevant feature tags.
1768 -- Note: there currently are no such constants defined in this section,
1769 -- since the compiler front end is currently entirely independent of the
1770 -- GCC version, which is a desirable state of affairs.
1772 function get_gcc_version return Int;
1773 pragma Import (C, get_gcc_version, "get_gcc_version");
1775 GCC_Version : constant Nat := get_gcc_version;
1777 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
1778 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.