1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2008, 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 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 -- This package contains global flags set by the initialization routine from
35 -- the command line and referenced throughout the compiler, the binder, or
36 -- other GNAT tools. The comments indicate which options are used by which
37 -- programs (GNAT, GNATBIND, GNATLINK, GNATMAKE, GPRMAKE, etc).
39 -- Some flags are labelled "PROJECT MANAGER". These are used by tools that
40 -- use the Project Manager. These tools include gnatmake, gnatname, the gnat
41 -- driver, gnatclean, gprbuild and gprclean.
44 with Hostparm; use Hostparm;
45 with Types; use Types;
47 with System.Strings; use System.Strings;
48 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 := True;
162 -- ??? true for now, enable by setting to false later
164 -- Normally, in accordance with (RM 13.9.1 (9-11)) the front end assumes
165 -- that values could have invalid representations, unless it can clearly
166 -- prove that the values are valid. If this switch is set (by -gnatB or by
167 -- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values
168 -- are valid and in range of their representations.
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 Bind_Alternate_Main_Name : Boolean := False;
180 -- True if main should be called Alternate_Main_Name.all.
181 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
183 Bind_Main_Program : Boolean := True;
185 -- Set to False if not binding main Ada program
187 Bind_For_Library : Boolean := False;
189 -- Set to True if the binder needs to generate a file designed for
190 -- building a library. May be set to True by Gnatbind.Scan_Bind_Arg.
192 Bind_Only : Boolean := False;
193 -- GNATMAKE, GPRMAKE, GPRBUILD
194 -- Set to True to skip compile and link steps
195 -- (except when Compile_Only and/or Link_Only are True).
197 Blank_Deleted_Lines : Boolean := False;
199 -- Output empty lines for each line of preprocessed input that is deleted
200 -- in the output, including preprocessor lines starting with a '#'.
202 Brief_Output : Boolean := False;
204 -- Force brief error messages to standard error, even if verbose mode is
205 -- set (so that main error messages go to standard output).
207 Build_Bind_And_Link_Full_Project : Boolean := False;
209 -- Set to True to build, bind and link all the sources of a project file
212 Check_Object_Consistency : Boolean := False;
213 -- GNATBIND, GNATMAKE
214 -- Set to True to check whether every object file is consistent with
215 -- its corresponding ada library information (ALI) file. An object
216 -- file is inconsistent with the corresponding ALI file if the object
217 -- file does not exist or if it has an older time stamp than the ALI file.
218 -- Default above is for GNATBIND. GNATMAKE overrides this default to
219 -- True (see Make.Initialize) since we normally do need to check source
220 -- consistencies in gnatmake.
222 Check_Only : Boolean := False;
224 -- Set to True to do checks only, no output of binder file
226 Check_Policy_List : Node_Id := Empty;
228 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
229 -- that are linked through the Next_Pragma fields, with the list being
230 -- terminated by Empty. The order is most recently processed first.
232 Check_Readonly_Files : Boolean := False;
234 -- Set to True to check readonly files during the make process
236 Check_Source_Files : Boolean := True;
237 -- GNATBIND, GNATMAKE
238 -- Set to True to enable consistency checking for any source files that
239 -- are present (i.e. date must match the date in the library info file).
240 -- Set to False for object file consistency check only. This flag is
241 -- directly modified by gnatmake, to affect the shared binder routines.
243 Check_Switches : Boolean := False;
244 -- GNATMAKE, GPRMAKE, GPBUILD
245 -- Set to True to check compiler options during the make process
247 Check_Unreferenced : Boolean := False;
249 -- Set to True to enable checking for unreferenced entities other
250 -- than formal parameters (for which see Check_Unreferenced_Formals)
252 Check_Unreferenced_Formals : Boolean := False;
254 -- Set True to check for unreferenced formals. This is turned on by
255 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
257 Check_Withs : Boolean := False;
259 -- Set to True to enable checking for unused withs, and also the case
260 -- of withing a package and using none of the entities in the package.
262 Commands_To_Stdout : Boolean := False;
264 -- True if echoed commands to be written to stdout instead of stderr
266 Comment_Deleted_Lines : Boolean := False;
268 -- True if source lines removed by the preprocessor should be commented
269 -- in the output file.
271 Compile_Only : Boolean := False;
272 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN
273 -- GNATMAKE, GPRMAKE, GPRMAKE:
274 -- set to True to skip bind and link steps (except when Bind_Only is
276 -- GNATCLEAN, GPRCLEAN:
277 -- set to True to delete only the files produced by the compiler but not
278 -- the library files or the executable files.
280 Config_File : Boolean := True;
282 -- Set to False to inhibit reading and processing of gnat.adc file
284 Config_File_Names : String_List_Access := null;
286 -- Names of configuration pragmas files (given by switches -gnatec)
288 Configurable_Run_Time_Mode : Boolean := False;
290 -- Set True if the compiler is operating in configurable run-time mode.
291 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
292 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
293 -- for details on the handling of the latter pragma.
295 Constant_Condition_Warnings : Boolean := False;
297 -- Set to True to activate warnings on constant conditions
299 Create_Mapping_File : Boolean := False;
301 -- Set to True (-C switch) to indicate that the compiler will be invoked
302 -- with a mapping file (-gnatem compiler switch).
304 Debug_Pragmas_Enabled : Boolean := False;
306 -- Enable debug statements from pragma Debug
308 subtype Debug_Level_Value is Nat range 0 .. 3;
309 Debugger_Level : Debug_Level_Value := 0;
311 -- The value given to the -g parameter. The default value for -g with
312 -- no value is 2. This is usually ignored by GNATBIND, except in the
313 -- VMS version where it is passed as an argument to __gnat_initialize
314 -- to trigger the activation of the remote debugging interface.
315 -- Is this still true ???
317 Debug_Generated_Code : Boolean := False;
319 -- Set True (-gnatD switch) to debug generated expanded code instead
320 -- of the original source code. Causes debugging information to be
321 -- written with respect to the generated code file that is written.
323 Default_Exit_Status : Int := 0;
325 -- Set the default exit status value. Set by the -Xnnn switch for the
328 Default_Stack_Size : Int := -1;
330 -- Set to default primary stack size in units of bytes. Set by
331 -- the -dnnn switch for the binder. A value of -1 indicates that no
332 -- default was set by the binder.
334 Default_Sec_Stack_Size : Int := -1;
336 -- Set to default secondary stack size in units of bytes. Set by
337 -- the -Dnnn switch for the binder. A value of -1 indicates that no
338 -- default was set by the binder, and that the default should be the
339 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
341 Detect_Blocking : Boolean := False;
343 -- Set True to force the run time to raise Program_Error if calls to
344 -- potentially blocking operations are detected from protected actions.
346 Display_Compilation_Progress : Boolean := False;
347 -- GNATMAKE, GPRMAKE, GPRBUILD
348 -- Set True (-d switch) to display information on progress while compiling
349 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
351 type Distribution_Stub_Mode_Type is
354 -- Normal mode, no generation/compilation of distribution stubs
356 Generate_Receiver_Stub_Body,
357 -- The unit being compiled is the RCI body, and the compiler will
358 -- generate the body for the receiver stubs and compile it.
360 Generate_Caller_Stub_Body);
361 -- The unit being compiled is the RCI spec, and the compiler will
362 -- generate the body for the caller stubs and compile it.
364 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
366 -- This enumeration variable indicates the five states of distribution
367 -- annex stub generation/compilation.
369 Do_Not_Execute : Boolean := False;
371 -- Set to True if no actual compilations should be undertaken.
373 Dump_Source_Text : Boolean := False;
375 -- Set to True (by -gnatL) to dump source text intermingled with generated
376 -- code. Effective only if either of Debug/Print_Generated_Code is true.
378 Dynamic_Elaboration_Checks : Boolean := False;
380 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
381 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
383 Dynamic_Stack_Measurement : Boolean := False;
385 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
387 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
389 -- Number of measurements we want to store during dynamic stack analysis.
390 -- When the buffer is full, non-storable results will be output on the fly.
391 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
392 -- by processing of -u flag for gnatbind.
394 Elab_Dependency_Output : Boolean := False;
396 -- Set to True to output complete list of elaboration constraints
398 Elab_Order_Output : Boolean := False;
400 -- Set to True to output chosen elaboration order
402 Elab_Warnings : Boolean := False;
404 -- Set to True to generate full elaboration warnings (-gnatwl)
406 Enable_Overflow_Checks : Boolean := False;
408 -- Set to True if -gnato (enable overflow checks) switch is set,
411 Error_Msg_Line_Length : Nat := 0;
413 -- Records the error message line length limit. If this is set to zero,
414 -- then we get the old style behavior, in which each call to the error
415 -- message routines generates one line of output as a separate message.
416 -- If it is set to a non-zero value, then continuation lines are folded
417 -- to make a single long message, and then this message is split up into
418 -- multiple lines not exceeding the specified length. Set by -gnatj=nn.
420 Exception_Locations_Suppressed : Boolean := False;
422 -- This flag is set True if a Suppress_Exception_Locations configuration
423 -- pragma is currently active.
425 type Exception_Mechanism_Type is
426 -- Determines the handling of exceptions. See Exp_Ch11 for details
428 (Front_End_Setjmp_Longjmp_Exceptions,
429 -- Exceptions use setjmp/longjmp generated explicitly by the
430 -- front end (this includes gigi or other equivalent parts of
431 -- the code generator). AT END handlers are converted into
432 -- exception handlers by the front end in this mode.
434 Back_End_Exceptions);
435 -- Exceptions are handled by the back end. The front end simply
436 -- generates the handlers as they appear in the source, and AT
437 -- END handlers are left untouched (they are not converted into
438 -- exception handlers when operating in this mode.
439 pragma Convention (C, Exception_Mechanism_Type);
441 Exception_Mechanism : Exception_Mechanism_Type :=
442 Front_End_Setjmp_Longjmp_Exceptions;
444 -- Set to the appropriate value depending on the default as given in
445 -- system.ads (ZCX_By_Default, GCC_ZCX_Support).
446 -- The C convention is there to make this variable accessible to gigi.
448 Exception_Tracebacks : Boolean := False;
450 -- Set to True to store tracebacks in exception occurrences (-E)
452 Extensions_Allowed : Boolean := False;
454 -- Set to True by switch -gnatX if GNAT specific language extensions
455 -- are allowed. For example, the use of 'Constrained with objects of
456 -- generic types is a GNAT extension.
458 type External_Casing_Type is (
459 As_Is, -- External names cased as they appear in the Ada source
460 Uppercase, -- External names forced to all uppercase letters
461 Lowercase); -- External names forced to all lowercase letters
463 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
465 -- The setting of this flag determines the casing of external names
466 -- when the name is implicitly derived from an entity name (i.e. either
467 -- no explicit External_Name or Link_Name argument is used, or, in the
468 -- case of extended DEC pragmas, the external name is given using an
469 -- identifier. The As_Is setting is not permitted here (since this would
470 -- create Ada source programs that were case sensitive).
472 External_Name_Exp_Casing : External_Casing_Type := As_Is;
474 -- The setting of this flag determines the casing of an external name
475 -- specified explicitly with a string literal. As_Is means the string
476 -- literal is used as given with no modification to the casing. If
477 -- Lowercase or Uppercase is set, then the string is forced to all
478 -- lowercase or all uppercase letters as appropriate. Note that this
479 -- setting has no effect if the external name is given using an identifier
480 -- in the case of extended DEC import/export pragmas (in this case the
481 -- casing is controlled by External_Name_Imp_Casing), and also has no
482 -- effect if an explicit Link_Name is supplied (a link name is always
483 -- used exactly as given).
485 External_Unit_Compilation_Allowed : Boolean := False;
487 -- When True (set by gnatmake switch -x), allow compilation of sources
488 -- that are not part of any project file.
490 Fast_Math : Boolean := False;
492 -- Indicates the current setting of Fast_Math mode, as set by the use
493 -- of a Fast_Math pragma (set on by Fast_Math (On)).
495 Float_Format : Character := ' ';
497 -- A non-blank value indicates that a Float_Format pragma has been
498 -- processed, in which case this variable is set to 'I' for IEEE or
499 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
502 Float_Format_Long : Character := ' ';
504 -- A non-blank value indicates that a Long_Float pragma has been
505 -- processed (this pragma is recognized only in OpenVMS versions
506 -- of GNAT), in which case this variable is set to D or G for
507 -- D_Float or G_Float.
509 Force_ALI_Tree_File : Boolean := False;
511 -- Force generation of ALI file even if errors are encountered.
512 -- Also forces generation of tree file if -gnatt is also set.
514 Force_Checking_Of_Elaboration_Flags : Boolean := False;
516 -- True if binding with forced checking of the elaboration flags
519 Force_Compilations : Boolean := False;
520 -- GNATMAKE, GPRMAKE, GPRBUILD
521 -- Set to force recompilations even when the objects are up-to-date.
523 Full_Path_Name_For_Brief_Errors : Boolean := False;
525 -- When True, in Brief_Output mode, each error message line
526 -- will start with the full path name of the source.
527 -- When False, only the file name without directory information
530 Full_List : Boolean := False;
532 -- Set True to generate full source listing with embedded errors
534 Full_List_File_Name : String_Ptr := null;
536 -- Set to file name to generate full source listing to named file (or if
537 -- the name is of the form .xxx, then to name.xxx where name is the source
538 -- file name with extension stripped.
540 Generate_Processed_File : Boolean := False;
542 -- True when switch -gnateG is used. When True, create in a file
543 -- <source>.prep, if the source is preprocessed.
545 Generating_Code : Boolean := False;
547 -- True if the frontend finished its work and has called the backend to
548 -- process the tree and generate the object file.
550 Global_Discard_Names : Boolean := False;
552 -- True if a pragma Discard_Names appeared as a configuration pragma for
553 -- the current compilation unit.
555 GNAT_Mode : Boolean := False;
557 -- True if compiling in GNAT system mode (-gnatg switch)
559 HLO_Active : Boolean := False;
561 -- True if High Level Optimizer is activated (-gnatH switch)
563 Identifier_Character_Set : Character;
565 -- This variable indicates the character set to be used for identifiers.
566 -- The possible settings are:
567 -- '1' Latin-5 (ISO-8859-1)
568 -- '2' Latin-5 (ISO-8859-2)
569 -- '3' Latin-5 (ISO-8859-3)
570 -- '4' Latin-5 (ISO-8859-4)
571 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
572 -- '9' Latin-5 (ISO-8859-9)
573 -- 'p' PC (US, IBM page 437)
574 -- '8' PC (European, IBM page 850)
575 -- 'f' Full upper set (all distinct)
576 -- 'n' No upper characters (Ada 83 rules)
577 -- 'w' Latin-1 plus wide characters allowed in identifiers
579 -- The setting affects the set of letters allowed in identifiers and the
580 -- upper/lower case equivalences. It does not affect the interpretation of
581 -- character and string literals, which are always stored using the actual
582 -- coding in the source program. This variable is initialized to the
583 -- default value appropriate to the system (in Osint.Initialize), and then
584 -- reset if a command line switch is used to change the setting.
586 Ignore_Rep_Clauses : Boolean := False;
588 -- Set True to ignore all representation clauses. Useful when compiling
589 -- code from foreign compilers for checking or ASIS purposes. Can be
590 -- set True by use of -gnatI.
592 Implementation_Unit_Warnings : Boolean := True;
594 -- Set True to active warnings for use of implementation internal units.
595 -- Can be controlled by use of -gnatwi/-gnatwI.
597 Implicit_Packing : Boolean := False;
599 -- If set True, then a Size attribute clause on an array is allowed to
600 -- cause implicit packing instead of generating an error message. Set by
601 -- use of pragma Implicit_Packing.
603 Ineffective_Inline_Warnings : Boolean := False;
605 -- Set True to activate warnings if front-end inlining (-gnatN) is not
606 -- able to actually inline a particular call (or all calls). Can be
607 -- controlled by use of -gnatwp/-gnatwP.
609 Init_Or_Norm_Scalars : Boolean := False;
611 -- Set True if a pragma Initialize_Scalars applies to the current unit.
612 -- Also set True if a pragma Normalize_Scalars applies.
614 Initialize_Scalars : Boolean := False;
616 -- Set True if a pragma Initialize_Scalars applies to the current unit.
617 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
619 Initialize_Scalars_Mode1 : Character := 'I';
620 Initialize_Scalars_Mode2 : Character := 'N';
622 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
623 -- is IN (invalid values), used if no -S switch is used.
625 Inline_Active : Boolean := False;
627 -- Set True to activate pragma Inline processing across modules. Default
628 -- for now is not to inline across module boundaries.
630 Interface_Library_Unit : Boolean := False;
632 -- Set to True to indicate that at least one ALI file is an interface ALI:
633 -- then elaboration flag checks are to be generated in the binder
636 Inspector_Mode : Boolean renames Debug.Debug_Flag_Dot_II;
638 -- True if compiling in inspector mode (-gnatd.I switch).
639 -- Only relevant when VM_Target /= None. The compiler will attempt to
640 -- generate code even in case of unsupported construct, so that the byte
641 -- code can be used by static analysis tools.
643 Invalid_Value_Used : Boolean := False;
645 -- Set True if a valid Invalid_Value attribute is encountered
647 Follow_Links_For_Files : Boolean := False;
649 -- Set to True (-eL) to process the project files in trusted mode
650 -- If Follow_Links is False, it is assumed that the project doesn't contain
651 -- any file duplicated through symbolic links (although the latter are
652 -- still valid if they point to a file which is outside of the project),
653 -- and that no directory has a name which is a valid source name.
655 Follow_Links_For_Dirs : Boolean := True;
657 -- Whether directories can be links in this project, and therefore
658 -- additional system calls should be performed to ensure we always see the
659 -- same full name for each directory.
661 Front_End_Inlining : Boolean := False;
663 -- Set True to activate inlining by front-end expansion
665 Inline_Processing_Required : Boolean := False;
667 -- Set True if inline processing is required. Inline processing is
668 -- required if an active Inline pragma is processed. The flag is set
669 -- for a pragma Inline or Inline_Always that is actually active.
671 In_Place_Mode : Boolean := False;
673 -- Set True to store ALI and object files in place i.e. in the object
674 -- directory if these files already exist or in the source directory
677 Keep_Going : Boolean := False;
678 -- GNATMAKE, GPRMAKE, GPRBUILD
679 -- When True signals to ignore compilation errors and keep
680 -- processing sources until there is no more work.
682 Keep_Temporary_Files : Boolean := False;
684 -- When True the temporary files created by the GNAT driver are not
685 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
687 Leap_Seconds_Support : Boolean := False;
689 -- Set to True to enable leap seconds support in Ada.Calendar and its
692 Link_Only : Boolean := False;
693 -- GNATMAKE, GPRMAKE, GPRBUILD
694 -- Set to True to skip compile and bind steps
695 -- (except when Bind_Only is set to True).
697 List_Restrictions : Boolean := False;
699 -- Set to True to list restrictions pragmas that could apply to partition
701 List_Units : Boolean := False;
703 -- List units in the active library for a compilation (-gnatu switch)
705 List_Closure : Boolean := False;
707 -- List all sources in the closure of a main (-R gnatbind switch)
709 List_Dependencies : Boolean := False;
711 -- When True gnatmake verifies that the objects are up to date and
712 -- outputs the list of object dependencies (-M switch).
713 -- Output depends if -a switch is used or not.
714 -- This list can be used directly in a Makefile.
716 List_Representation_Info : Int range 0 .. 3 := 0;
718 -- Set non-zero by -gnatR switch to list representation information.
719 -- The settings are as follows:
721 -- 0 = no listing of representation information (default as above)
722 -- 1 = list rep info for user defined record and array types
723 -- 2 = list rep info for all user defined types and objects
724 -- 3 = like 2, but variable fields are decoded symbolically
726 List_Representation_Info_To_File : Boolean := False;
728 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3
729 -- to be written to file.rep (where file is the name of the source
730 -- file) instead of stdout. For example, if file x.adb is compiled
731 -- using -gnatR2s then representation info is written to x.adb.ref.
733 List_Representation_Info_Mechanisms : Boolean := False;
735 -- Set true by -gnatRm switch. Causes information on mechanisms to
736 -- be included in the representation output information.
738 List_Preprocessing_Symbols : Boolean := False;
740 -- Set to True if symbols for preprocessing a source are to be listed
741 -- before preprocessing occurs. Set to True by switch -s of gnatprep
742 -- or -s in preprocessing data file for the compiler.
744 type Create_Repinfo_File_Proc is access procedure (Src : String);
745 type Write_Repinfo_Line_Proc is access procedure (Info : String);
746 type Close_Repinfo_File_Proc is access procedure;
747 -- Types used for procedure addresses below
749 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
750 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
751 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
753 -- These three locations are left null when operating in non-compiler
754 -- (e.g. ASIS mode), but when operating in compiler mode, they are
755 -- set to point to the three corresponding procedures in Osint-C. The
756 -- reason for this slightly strange interface is to prevent Repinfo
757 -- from dragging in Osint in ASIS mode, which would include a lot of
758 -- unwanted units in the ASIS build.
760 type Create_List_File_Proc is access procedure (S : String);
761 type Write_List_Info_Proc is access procedure (S : String);
762 type Close_List_File_Proc is access procedure;
763 -- Types used for procedure addresses below
765 Create_List_File_Access : Create_List_File_Proc := null;
766 Write_List_Info_Access : Write_List_Info_Proc := null;
767 Close_List_File_Access : Close_List_File_Proc := null;
769 -- These three locations are left null when operating in non-compiler
770 -- (e.g. from the binder), but when operating in compiler mode, they are
771 -- set to point to the three corresponding procedures in Osint-C. The
772 -- reason for this slightly strange interface is to prevent Repinfo
773 -- from dragging in Osint-C in the binder, which would include unwanted
774 -- units in the binder.
776 Locking_Policy : Character := ' ';
778 -- Set to ' ' for the default case (no locking policy specified).
779 -- Reset to first character (uppercase) of locking policy name if a
780 -- valid pragma Locking_Policy is encountered.
782 Locking_Policy_Sloc : Source_Ptr := No_Location;
784 -- Remember location of previous Locking_Policy pragma. This is used
785 -- for inconsistency error messages. A value of System_Location is
786 -- used if the policy is set in package System.
788 Look_In_Primary_Dir : Boolean := True;
789 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
790 -- Set to False if a -I- was present on the command line.
791 -- When True we are allowed to look in the primary directory to locate
792 -- other source or library files.
794 Make_Steps : Boolean := False;
796 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
799 Main_Index : Int := 0;
801 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
802 -- the main program is the nnn unit in a multi-unit source file.
804 Mapping_File_Name : String_Ptr := null;
806 -- File name of mapping between unit names, file names and path names.
807 -- (given by switch -gnatem)
809 Maximum_Errors : Int := 9999;
811 -- Maximum default number of errors before compilation is terminated.
812 -- Can be overridden using -gnatm (GNAT) or -m (GNATBIND) switch.
814 Maximum_File_Name_Length : Int;
816 -- Maximum number of characters allowed in a file name, not counting the
817 -- extension, as set by the appropriate switch. If no switch is given,
818 -- then this value is initialized by Osint to the appropriate value.
820 Maximum_Processes : Positive := 1;
821 -- GNATMAKE, GPRMAKE, GPRBUILD
822 -- Maximum number of processes that should be spawned to carry out
825 Minimal_Recompilation : Boolean := False;
827 -- Set to True if minimal recompilation mode requested
829 Special_Exception_Package_Used : Boolean := False;
831 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
832 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
833 -- local raise statements into gotos in the presence of either package.
835 Multiple_Unit_Index : Int;
837 -- This is set non-zero if the current unit is being compiled in multiple
838 -- unit per file mode, meaning that the current unit is selected from the
839 -- sequence of units in the current source file, using the value stored
840 -- in this variable (e.g. 2 = select second unit in file). A value of
841 -- zero indicates that we are in normal (one unit per file) mode.
843 No_Main_Subprogram : Boolean := False;
844 -- GNATMAKE, GNATBIND
845 -- Set to True if compilation/binding of a program without main
846 -- subprogram requested.
848 No_Run_Time_Mode : Boolean := False;
850 -- This flag is set True if a No_Run_Time pragma is encountered. See
851 -- spec of Rtsfind for a full description of handling of this pragma.
853 No_Stdinc : Boolean := False;
854 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
855 -- Set to True if no default source search dirs added to search list
857 No_Stdlib : Boolean := False;
858 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
859 -- Set to True if no default library search dirs added to search list
861 No_Strict_Aliasing : Boolean := False;
863 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
865 Normalize_Scalars : Boolean := False;
867 -- Set True if a pragma Normalize_Scalars applies to the current unit.
868 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
870 Object_Directory_Present : Boolean := False;
872 -- Set to True when an object directory is specified with option -D
874 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
875 Operating_Mode : Operating_Mode_Type := Generate_Code;
877 -- Indicates the operating mode of the compiler. The default is generate
878 -- code, which runs the parser, semantics and backend. Switches can be
879 -- used to set syntax checking only mode, or syntax and semantics checking
880 -- only mode. Operating_Mode can also be modified as a result of detecting
881 -- errors during the compilation process. In particular if any serious
882 -- error is detected then this flag is reset from Generate_Code to
883 -- Check_Semantics after generating an error message.
885 Optimize_Alignment : Character := 'O';
886 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can
887 -- be modified by use of pragma Optimize_Alignment.
889 Optimize_Alignment_Local : Boolean := False;
890 -- Set True if Optimize_Alignment mode is set by a local configuration
891 -- pragma that overrides the gnat.adc (or other configuration file) default
892 -- so that the unit is not dependent on the default setting. Also always
893 -- set True for internal units, since these always have a default setting
894 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to
895 -- them all having such an explicit pragma in each unit).
897 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
899 -- Indicates the original operating mode of the compiler as set by
900 -- compiler options. This is identical to Operating_Mode except that
901 -- this is not affected by errors.
903 Optimization_Level : Int;
904 pragma Import (C, Optimization_Level, "optimize");
905 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
907 Output_File_Name_Present : Boolean := False;
908 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
909 -- Set to True when the output C file name is given with option -o
910 -- for GNATBIND, when the object file name is given with option
911 -- -gnatO for GNAT or when the executable is given with option -o
912 -- for GNATMAKE or GPRMAKE.
914 Output_Linker_Option_List : Boolean := False;
916 -- True if output of list of linker options is requested (-K switch set)
918 Output_Object_List : Boolean := False;
920 -- True if output of list of objects is requested (-O switch set)
922 Overflow_Checks_Unsuppressed : Boolean := False;
924 -- Set to True if at least one pragma Unsuppress
925 -- (All_Checks|Overflow_Checks) has been processed.
927 Persistent_BSS_Mode : Boolean := False;
929 -- True if a Persistent_BSS configuration pragma is in effect, causing
930 -- potentially persistent data to be placed in the persistent_bss section.
932 Pessimistic_Elab_Order : Boolean := False;
934 -- True if pessimistic elaboration order is to be chosen (-p switch set)
936 Polling_Required : Boolean := False;
938 -- Set to True if polling for asynchronous abort is enabled by using
939 -- the -gnatP option for GNAT.
941 Preprocessing_Data_File : String_Ptr := null;
943 -- Set by switch -gnatep=. The file name of the preprocessing data file.
945 Print_Generated_Code : Boolean := False;
947 -- Set to True to enable output of generated code in source form. This
948 -- flag is set by the -gnatG switch.
950 Print_Standard : Boolean := False;
952 -- Set to true to enable printing of package standard in source form.
953 -- This flag is set by the -gnatS switch
955 Propagate_Exceptions : Boolean := False;
957 -- Indicates if subprogram descriptor exception tables should be
958 -- built for imported subprograms. Set True if a Propagate_Exceptions
959 -- pragma applies to the extended main unit.
961 type Usage is (Unknown, Not_In_Use, In_Use);
962 Project_File_In_Use : Usage := Unknown;
964 -- Indicates if a project file is used or not.
965 -- Set to In_Use by the first SFNP pragma.
967 Queuing_Policy : Character := ' ';
969 -- Set to ' ' for the default case (no queuing policy specified).
970 -- Reset to first character (uppercase) of locking policy name if a valid
971 -- Queuing_Policy pragma is encountered.
973 Queuing_Policy_Sloc : Source_Ptr := No_Location;
975 -- Remember location of previous Queuing_Policy pragma. This is used
976 -- for inconsistency error messages. A value of System_Location is
977 -- used if the policy is set in package System.
979 Quiet_Output : Boolean := False;
980 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN
981 -- Set to True if the tool should not have any output if there are no
982 -- errors or warnings.
984 Replace_In_Comments : Boolean := False;
986 -- Set to True if -C switch used
988 RTS_Lib_Path_Name : String_Ptr := null;
989 RTS_Src_Path_Name : String_Ptr := null;
991 -- Set to the "adalib" and "adainclude" directories of the run time
992 -- specified by --RTS=.
994 RTS_Switch : Boolean := False;
995 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
996 -- Set to True when the --RTS switch is set
998 Run_Path_Option : Boolean := True;
999 -- GNATMAKE, GNATLINK
1000 -- Set to False when no run_path_option should be issued to the linker
1002 Search_Directory_Present : Boolean := False;
1004 -- Set to True when argument is -I. Reset to False when next argument,
1005 -- a search directory path is taken into account. Note that this is
1006 -- quite different from other switches in this section in that it is
1007 -- only set in a transitory manner as a result of scanning a -I switch
1008 -- with no file name, and if set, is an indication that the next argument
1009 -- is to be treated as a file name.
1011 Sec_Stack_Used : Boolean := False;
1013 -- Set True if generated code uses the System.Secondary_Stack package.
1014 -- For the binder, set if any unit uses the secondary stack package.
1016 Setup_Projects : Boolean := False;
1018 -- Set to True for GNAT SETUP: the Project Manager creates non existing
1019 -- object, library and exec directories.
1021 Shared_Libgnat : Boolean;
1023 -- Set to True if a shared libgnat is requested by using the -shared
1024 -- option for GNATBIND and to False when using the -static option. The
1025 -- value of this flag is set by Gnatbind.Scan_Bind_Arg.
1027 Stack_Checking_Enabled : Boolean;
1029 -- Set to indicate if -fstack-check switch is set for the compilation. True
1030 -- means that the switch is set, so that stack checking is enabled. False
1031 -- means that the switch is not set (no stack checking). This value is
1032 -- obtained from the external imported value flag_stack_check in the gcc
1033 -- backend (see Frontend) and may be referenced throughout the compilation
1036 Style_Check : Boolean := False;
1038 -- Set True to perform style checks. Activates checks carried out
1039 -- in package Style (see body of this package for details of checks)
1040 -- This flag is set True by either the -gnatg or -gnaty switches.
1042 Suppress_All_Inlining : Boolean := False;
1044 -- Set by -fno-inline. Suppresses all inlining, both front end and back end
1045 -- regardless of any other switches that are set.
1047 System_Extend_Pragma_Arg : Node_Id := Empty;
1049 -- Set non-empty if and only if a correct Extend_System pragma was present
1050 -- in which case it points to the argument of the pragma, and the name can
1051 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
1053 System_Extend_Unit : Node_Id := Empty;
1055 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
1056 -- is never appropriate in GNAT_Mode (and causes troubles, including
1057 -- bogus circularities, if we try to compile the run-time library with
1058 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
1059 -- is a copy of the value set in System_Extend_Pragma_Arg.
1061 Subunits_Missing : Boolean := False;
1063 -- This flag is set true if missing subunits are detected with code
1064 -- generation active. This causes code generation to be skipped.
1066 Suppress_Checks : Boolean := False;
1068 -- Set to True if -gnatp (suppress all checks) switch present.
1070 Suppress_Options : Suppress_Array;
1072 -- Flags set True to suppress corresponding check, i.e. add an implicit
1073 -- pragma Suppress at the outer level of each unit compiled. Note that
1074 -- these suppress actions can be overridden by the use of the Unsuppress
1075 -- pragma. This variable is initialized by Osint.Initialize.
1077 Suppress_Back_Annotation : Boolean := False;
1079 -- This flag is set True if back annotation of representation information
1080 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
1081 -- This avoids unnecessary time being spent on back annotation.
1083 Table_Factor : Int := 1;
1085 -- Factor by which all initial table sizes set in Alloc are multiplied.
1086 -- Used in Table to calculate initial table sizes (the initial table size
1087 -- is the value in Alloc, used as the Table_Initial parameter value,
1088 -- multiplied by the factor given here. The default value is used if no
1089 -- -gnatT switch appears.
1091 Task_Dispatching_Policy : Character := ' ';
1093 -- Set to ' ' for the default case (no task dispatching policy specified).
1094 -- Reset to first character (uppercase) of task dispatching policy name
1095 -- if a valid Task_Dispatching_Policy pragma is encountered.
1097 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
1099 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1100 -- used for inconsistency error messages. A value of System_Location is
1101 -- used if the policy is set in package System.
1103 Tasking_Used : Boolean := False;
1104 -- Set True if any tasking construct is encountered. Used to activate the
1105 -- output of the Q, L and T lines in ALI files.
1107 Time_Slice_Set : Boolean := False;
1109 -- Set True if a pragma Time_Slice is processed in the main unit, or
1110 -- if the -gnatTnn switch is present to set a time slice value.
1112 Time_Slice_Value : Nat;
1114 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1115 -- Time_Slice pragma has been processed. Set to the time slice value in
1116 -- microseconds. Negative values are stored as zero, and the value is not
1117 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1118 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1120 Tolerate_Consistency_Errors : Boolean := False;
1122 -- Tolerate time stamp and other consistency errors. If this flag is set to
1123 -- True (-t), then inconsistencies result in warnings rather than errors.
1125 Treat_Restrictions_As_Warnings : Boolean := False;
1127 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
1130 Tree_Output : Boolean := False;
1132 -- Set to True (-gnatt) to generate output tree file
1134 True_VMS_Target : Boolean := False;
1135 -- Set True if we are on a VMS target. The setting of this flag reflects
1136 -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which
1137 -- can also be true when debug flag m is set (-gnatdm). This is used in the
1138 -- few cases where we do NOT want -gnatdm to trigger the VMS behavior.
1140 Try_Semantics : Boolean := False;
1142 -- Flag set to force attempt at semantic analysis, even if parser errors
1143 -- occur. This will probably cause blowups at this stage in the game. On
1144 -- the other hand, most such blowups will be caught cleanly and simply
1145 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
1147 Undefined_Symbols_Are_False : Boolean := False;
1149 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1150 -- file for the compiler. Indicates that while preprocessing sources,
1151 -- symbols that are not defined have the value FALSE.
1153 Unique_Error_Tag : Boolean := Tag_Errors;
1155 -- Indicates if error messages are to be prefixed by the string error:
1156 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1158 Universal_Addressing_On_AAMP : Boolean := False;
1160 -- Indicates if library-level objects should be accessed and updated using
1161 -- universal addressing instructions on the AAMP architecture. This flag is
1162 -- set to True when pragma Universal_Data is given as a configuration
1165 Unreserve_All_Interrupts : Boolean := False;
1167 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1168 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1169 -- corresponding attribute set in GNATBIND.
1171 Upper_Half_Encoding : Boolean := False;
1173 -- Normally set False, indicating that upper half ISO 8859-1 characters are
1174 -- used in the normal way to represent themselves. If the wide character
1175 -- encoding method uses the upper bit for this encoding, then this flag is
1176 -- set True, and upper half characters in the source indicate the start of
1177 -- a wide character sequence. Set by -gnatW or -W switches.
1179 Usage_Requested : Boolean := False;
1180 -- GNAT, GNATBIND, GNATMAKE
1181 -- Set to True if -h (-gnath for the compiler) switch encountered
1182 -- requesting usage information
1184 Use_Pragma_Linker_Constructor : Boolean := False;
1186 -- True if pragma Linker_Constructor applies to adainit
1188 Use_VADS_Size : Boolean := False;
1190 -- Set to True if a valid pragma Use_VADS_Size is processed
1192 Validity_Checks_On : Boolean := True;
1194 -- This flag determines if validity checking is on or off. The initial
1195 -- state is on, and the required default validity checks are active. The
1196 -- actual set of checks that is performed if Validity_Checks_On is set is
1197 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1198 -- is controlled by pragma Validity_Checks (On | Off), and also some
1199 -- generated compiler code (typically code that has to do with validity
1200 -- check generation) is compiled with this flag set to False. This flag is
1201 -- set to False by the -gnatp switch.
1203 Verbose_Mode : Boolean := False;
1204 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1205 -- GPRMAKE, GPRBUILD, GPRCLEAN
1206 -- Set to True to get verbose mode (full error message text and location
1207 -- information sent to standard output, also header, copyright and summary)
1209 type Verbosity_Level_Type is (None, Low, Medium, High);
1210 Verbosity_Level : Verbosity_Level_Type := High;
1211 -- GNATMAKE, GPRMAKE
1212 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1213 -- the level of verbosity of informational messages:
1215 -- In Low Verbosity, the reasons why a source is recompiled, the name
1216 -- of the executable and the reason it must be rebuilt is output.
1218 -- In Medium Verbosity, additional lines are output for each ALI file
1221 -- In High Verbosity, additional lines are output when the ALI file
1222 -- is part of an Ada library, is read-only or is part of the runtime.
1224 Warn_On_Ada_2005_Compatibility : Boolean := True;
1226 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1227 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1228 -- mode. Set False by -gnatwY.
1230 Warn_On_Parameter_Order : Boolean := False;
1232 -- Set to True to generate warnings for cases where the argument list for
1233 -- a call is a sequence of identifiers that match the formal identifiers,
1234 -- but are in the wrong order.
1236 Warn_On_Assertion_Failure : Boolean := True;
1238 -- Set to True to activate warnings on assertions that can be determined
1239 -- at compile time will always fail. Set false by -gnatw.A.
1241 Warn_On_Assumed_Low_Bound : Boolean := True;
1243 -- Set to True to activate warnings for string parameters that are indexed
1244 -- with literals or S'Length, presumably assuming a lower bound of one. Set
1245 -- False by -gnatwW.
1247 Warn_On_Bad_Fixed_Value : Boolean := False;
1249 -- Set to True to generate warnings for static fixed-point expression
1250 -- values that are not an exact multiple of the small value of the type.
1252 Warn_On_Biased_Representation : Boolean := True;
1254 -- Set to True to generate warnings for size clauses, component clauses
1255 -- and component_size clauses that force biased representation. Set False
1258 Warn_On_Constant : Boolean := False;
1260 -- Set to True to generate warnings for variables that could be declared
1261 -- as constants. Modified by use of -gnatwk/K.
1263 Warn_On_Deleted_Code : Boolean := False;
1265 -- Set to True to generate warnings for code deleted by the front end
1266 -- for conditional statements whose outcome is known at compile time.
1267 -- Modified by use of -gnatwt/T.
1269 Warn_On_Dereference : Boolean := False;
1271 -- Set to True to generate warnings for implicit dereferences for array
1272 -- indexing and record component access. Modified by use of -gnatwd/D.
1274 Warn_On_Export_Import : Boolean := True;
1276 -- Set to True to generate warnings for suspicious use of export or
1277 -- import pragmas. Modified by use of -gnatwx/X.
1279 Warn_On_Hiding : Boolean := False;
1281 -- Set to True to generate warnings if a declared entity hides another
1282 -- entity. The default is that this warning is suppressed.
1284 Warn_On_Modified_Unread : Boolean := False;
1286 -- Set to True to generate warnings if a variable is assigned but is never
1287 -- read. Also controls warnings for similar cases involving out parameters,
1288 -- but only if there is only one out parameter for the procedure involved.
1289 -- The default is that this warning is suppressed.
1291 Warn_On_All_Unread_Out_Parameters : Boolean := False;
1293 -- Set to True to generate warnings in all cases where a variable is
1294 -- modified by being passed as to an OUT formal, but the resulting value is
1295 -- never read. The default is that this warning is suppressed, except in
1298 Warn_On_No_Value_Assigned : Boolean := True;
1300 -- Set to True to generate warnings if no value is ever assigned to a
1301 -- variable that is at least partially uninitialized. Set to false to
1302 -- suppress such warnings. The default is that such warnings are enabled.
1304 Warn_On_Non_Local_Exception : Boolean := False;
1306 -- Set to True to generate warnings for non-local exception raises and also
1307 -- handlers that can never handle a local raise. This warning is only ever
1308 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1309 -- default is not to generate the warnings even if the restriction is set.
1311 Warn_On_Obsolescent_Feature : Boolean := False;
1313 -- Set to True to generate warnings on use of any feature in Annex or if a
1314 -- subprogram is called for which a pragma Obsolescent applies.
1316 Warn_On_Questionable_Missing_Parens : Boolean := True;
1318 -- Set to True to generate warnings for cases where parentheses are missing
1319 -- and the usage is questionable, because the intent is unclear.
1321 Warn_On_Redundant_Constructs : Boolean := False;
1323 -- Set to True to generate warnings for redundant constructs (e.g. useless
1324 -- assignments/conversions). The default is that this warning is disabled.
1326 Warn_On_Object_Renames_Function : Boolean := False;
1328 -- Set to True to generate warnings when a function result is renamed as
1329 -- an object. The default is that this warning is disabled.
1331 Warn_On_Reverse_Bit_Order : Boolean := True;
1333 -- Set to True to generate warning (informational) messages for component
1334 -- clauses that are affected by non-standard bit-order. The default is
1335 -- that this warning is enabled.
1337 Warn_On_Unchecked_Conversion : Boolean := True;
1339 -- Set to True to generate warnings for unchecked conversions that may have
1340 -- non-portable semantics (e.g. because sizes of types differ). The default
1341 -- is that this warning is enabled.
1343 Warn_On_Unrecognized_Pragma : Boolean := True;
1345 -- Set to True to generate warnings for unrecognized pragmas. The default
1346 -- is that this warning is enabled.
1348 Warn_On_Unrepped_Components : Boolean := False;
1350 -- Set to True to generate warnings for the case of components of record
1351 -- which have a record representation clause but this component does not
1352 -- have a component clause. The default is that this warning is disabled.
1354 Warn_On_Warnings_Off : Boolean := False;
1356 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent),
1357 -- where either the pragma is never used, or it could be replaced by a
1358 -- pragma Unmodified or Unreferenced.
1360 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1361 Warning_Mode : Warning_Mode_Type := Normal;
1363 -- Controls treatment of warning messages. If set to Suppress, warning
1364 -- messages are not generated at all. In Normal mode, they are generated
1365 -- but do not count as errors. In Treat_As_Error mode, warning messages
1366 -- are generated and are treated as errors.
1368 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1370 -- Method used for encoding wide characters in the source program. See
1371 -- description of type in unit System.WCh_Con for a list of the methods
1372 -- that are currently supported. Note that brackets notation is always
1373 -- recognized in source programs regardless of the setting of this
1374 -- variable. The default setting causes only the brackets notation to be
1375 -- recognized. If this is the main unit, this setting also controls the
1376 -- output of the W=? parameter in the ALI file, which is used to provide
1377 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder,
1378 -- the value set here overrides this main unit default.
1380 Wide_Character_Encoding_Method_Specified : Boolean := False;
1382 -- Set True if the value in Wide_Character_Encoding_Method was set as
1383 -- a result of an explicit -gnatW? or -W? switch. False otherwise.
1385 Xref_Active : Boolean := True;
1387 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1389 Zero_Formatting : Boolean := False;
1391 -- Do no formatting (no title, no leading spaces, no empty lines) in
1392 -- auxiliary outputs (-e, -K, -l, -R).
1394 ----------------------------
1395 -- Configuration Settings --
1396 ----------------------------
1398 -- These are settings that are used to establish the mode at the start of
1399 -- each unit. The values defined below can be affected either by command
1400 -- line switches, or by the use of appropriate configuration pragmas in a
1401 -- configuration pragma file.
1403 Ada_Version_Config : Ada_Version_Type;
1405 -- This is the value of the configuration switch for the Ada 83 mode, as
1406 -- set by the command line switches -gnat83/95/05, and possibly modified by
1407 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1408 -- to set the initial value for Ada_Version mode at the start of analysis
1409 -- of a unit. Note however, that the setting of this flag is ignored for
1410 -- internal and predefined units (which are always compiled in the most up
1411 -- to date version of Ada).
1413 Ada_Version_Explicit_Config : Ada_Version_Type;
1415 -- This is set in the same manner as Ada_Version_Config. The difference is
1416 -- that the setting of this flag is not ignored for internal and predefined
1417 -- units, which for some purposes do indeed access this value, regardless
1418 -- of the fact that they are compiled the most up to date ada version).
1420 Assertions_Enabled_Config : Boolean;
1422 -- This is the value of the configuration switch for assertions enabled
1423 -- mode, as possibly set by the command line switch -gnata, and possibly
1424 -- modified by the use of the configuration pragma Assertion_Policy.
1426 Assume_No_Invalid_Values_Config : Boolean;
1428 -- This is the value of the configuration switch for assuming no invalid
1429 -- values enabled mode mode, as possibly set by the command line switch
1430 -- -gnatB, and possibly modified by the use of the configuration pragma
1431 -- Assume_No_Invalid_Values.
1433 Check_Policy_List_Config : Node_Id;
1435 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
1436 -- that are linked through the Next_Pragma fields, with the list being
1437 -- terminated by Empty. The order is most recently processed first. This
1438 -- list includes only those pragmas in configuration pragma files.
1440 Debug_Pragmas_Enabled_Config : Boolean;
1442 -- This is the value of the configuration switch for debug pragmas enabled
1443 -- mode, as possibly set by the command line switch -gnata and possibly
1444 -- modified by the use of the configuration pragma Debug_Policy.
1446 Dynamic_Elaboration_Checks_Config : Boolean := False;
1448 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1449 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1451 Exception_Locations_Suppressed_Config : Boolean := False;
1453 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1455 Extensions_Allowed_Config : Boolean;
1457 -- This is the flag that indicates whether extensions are allowed. It can
1458 -- be set True either by use of the -gnatX switch, or by use of the
1459 -- configuration pragma Extensions_Allowed (On). It is always set to True
1460 -- for internal GNAT units, since extensions are always permitted in such
1463 External_Name_Exp_Casing_Config : External_Casing_Type;
1465 -- This is the value of the configuration switch that controls casing of
1466 -- external symbols for which an explicit external name is given. It can be
1467 -- set to Uppercase by the command line switch -gnatF, and further modified
1468 -- by the use of the configuration pragma External_Name_Casing in the
1469 -- gnat.adc file. This flag is used to set the initial value for
1470 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1471 -- however that the setting of this flag is ignored for internal and
1472 -- predefined units (which are always compiled with As_Is mode).
1474 External_Name_Imp_Casing_Config : External_Casing_Type;
1476 -- This is the value of the configuration switch that controls casing of
1477 -- external symbols where the external name is implicitly given. It can be
1478 -- set to Uppercase by the command line switch -gnatF, and further modified
1479 -- by the use of the configuration pragma External_Name_Casing in the
1480 -- gnat.adc file. This flag is used to set the initial value for
1481 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1482 -- however that the setting of this flag is ignored for internal and
1483 -- predefined units (which are always compiled with Lowercase mode).
1485 Fast_Math_Config : Boolean;
1487 -- This is the value of the configuration switch that controls Fast_Math
1488 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is
1489 -- used to set the initial value of Fast_Math at the start of each new
1490 -- compilation unit.
1492 Optimize_Alignment_Config : Character;
1494 -- This is the value of the configuration switch that controls the
1495 -- alignment optimization mode, as set by an Optimize_Alignment pragma.
1496 -- It is used to set the initial value of Optimize_Alignment at the start
1497 -- of each new compilation unit, except that it is always set to 'O' (off)
1498 -- for internal units.
1500 Persistent_BSS_Mode_Config : Boolean;
1502 -- This is the value of the configuration switch that controls whether
1503 -- potentially persistent data is to be placed in the persistent_bss
1504 -- section. It can be set True by use of the pragma Persistent_BSS.
1505 -- This flag is used to set the initial value of Persistent_BSS_Mode
1506 -- at the start of each compilation unit, except that it is always
1507 -- set False for predefined units.
1509 Polling_Required_Config : Boolean;
1511 -- This is the value of the configuration switch that controls polling
1512 -- mode. It can be set True by the command line switch -gnatP, and then
1513 -- further modified by the use of pragma Polling in the gnat.adc file. This
1514 -- flag is used to set the initial value for Polling_Required at the start
1515 -- of analyzing each unit.
1517 Use_VADS_Size_Config : Boolean;
1519 -- This is the value of the configuration switch that controls the use of
1520 -- VADS_Size instead of Size wherever the attribute Size is used. It can
1521 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1522 -- This flag is used to set the initial value for Use_VADS_Size at the
1523 -- start of analyzing each unit. Note however that the setting of this flag
1524 -- is ignored for internal and predefined units (which are always compiled
1525 -- with the standard Size semantics).
1527 type Config_Switches_Type is private;
1528 -- Type used to save values of the switches set from Config values
1530 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1531 -- This procedure saves the current values of the switches which are
1532 -- initialized from the above Config values, and then resets these switches
1533 -- according to the Config value settings.
1535 procedure Set_Opt_Config_Switches
1536 (Internal_Unit : Boolean;
1537 Main_Unit : Boolean);
1538 -- This procedure sets the switches to the appropriate initial values. The
1539 -- parameter Internal_Unit is True for an internal or predefined unit, and
1540 -- affects the way the switches are set (see above). Main_Unit is true if
1541 -- switches are being set for the main unit (this affects setting of the
1542 -- assert/debug pragma switches, which are normally set false by default
1543 -- for an internal unit, except when the internal unit is the main unit,
1544 -- in which case we use the command line settings).
1546 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1547 -- This procedure restores a set of switch values previously saved by a
1548 -- call to Save_Opt_Switches.
1550 procedure Register_Opt_Config_Switches;
1551 -- This procedure is called after processing the gnat.adc file and other
1552 -- configuration pragma files to record the values of the Config switches,
1553 -- as possibly modified by the use of command line switches and pragmas
1554 -- appearing in these files.
1556 ------------------------
1557 -- Other Global Flags --
1558 ------------------------
1560 Expander_Active : Boolean := False;
1561 -- A flag that indicates if expansion is active (True) or deactivated
1562 -- (False). When expansion is deactivated all calls to expander routines
1563 -- have no effect. Note that the initial setting of False is merely to
1564 -- prevent saving of an undefined value for an initial call to the
1565 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1566 -- this flag, see package Expander. Indeed this flag might more logically
1567 -- be in the spec of Expander, but it is referenced by Errout, and it
1568 -- really seems wrong for Errout to depend on Expander.
1570 Static_Dispatch_Tables : Boolean := True;
1571 -- This flag indicates if the backend supports generation of statically
1572 -- allocated dispatch tables. If it is True, then the front end will
1573 -- generate static aggregates for dispatch tables that contain forward
1574 -- references to addresses of subprograms not seen yet, and the back end
1575 -- must be prepared to handle this case. If it is False, then the front
1576 -- end generates assignments to initialize the dispatch table, and there
1577 -- are no such forward references. By default we build statically allocated
1578 -- dispatch tables for all library level tagged types in all platforms.This
1579 -- behavior can be disabled using switch -gnatd.t which will set this flag
1580 -- to False and revert to the previous dynamic behavior.
1582 -----------------------
1583 -- Tree I/O Routines --
1584 -----------------------
1586 procedure Tree_Read;
1587 -- Reads switch settings from current tree file using Tree_Read
1589 procedure Tree_Write;
1590 -- Writes out switch settings to current tree file using Tree_Write
1592 --------------------------
1593 -- ASIS Version Control --
1594 --------------------------
1596 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1597 -- are supposed to be used in the GNAT/ASIS version check performed in
1598 -- the ASIS code (this package is also a part of the ASIS implementation).
1599 -- They are set by Tree_Read procedure, so they represent the version
1600 -- number (and the version string) of the compiler which has created the
1601 -- tree, and they are supposed to be compared with the corresponding values
1602 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS
1605 Tree_Version_String : String_Access;
1606 -- Used to store the compiler version string read from a tree file to check
1607 -- if it is from the same date as stored in the version string in Gnatvsn.
1608 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1609 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1610 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1611 -- of the corresponding source sets, using version strings that may be
1612 -- of different lengths.
1614 Tree_ASIS_Version_Number : Int;
1615 -- Used to store the ASIS version number read from a tree file to check if
1616 -- it is the same as stored in the ASIS version number in Tree_IO.
1620 -- The following type is used to save and restore settings of switches in
1621 -- Opt that represent the configuration (i.e. result of config pragmas).
1623 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1624 -- flag that once set does not get reset, since the whole idea of this flag
1625 -- is to record the setting for the main unit.
1627 type Config_Switches_Type is record
1628 Ada_Version : Ada_Version_Type;
1629 Ada_Version_Explicit : Ada_Version_Type;
1630 Assertions_Enabled : Boolean;
1631 Assume_No_Invalid_Values : Boolean;
1632 Check_Policy_List : Node_Id;
1633 Debug_Pragmas_Enabled : Boolean;
1634 Dynamic_Elaboration_Checks : Boolean;
1635 Exception_Locations_Suppressed : Boolean;
1636 Extensions_Allowed : Boolean;
1637 External_Name_Exp_Casing : External_Casing_Type;
1638 External_Name_Imp_Casing : External_Casing_Type;
1639 Fast_Math : Boolean;
1640 Optimize_Alignment : Character;
1641 Optimize_Alignment_Local : Boolean;
1642 Persistent_BSS_Mode : Boolean;
1643 Polling_Required : Boolean;
1644 Use_VADS_Size : Boolean;
1647 -- The following declarations are for GCC version dependent flags. We do
1648 -- not let client code in the compiler test GCC_Version directly, but
1649 -- instead use deferred constants for relevant feature tags.
1651 -- Note: there currently are no such constants defined in this section,
1652 -- since the compiler front end is currently entirely independent of the
1653 -- GCC version, which is a desirable state of affairs.
1655 function get_gcc_version return Int;
1656 pragma Import (C, get_gcc_version, "get_gcc_version");
1658 GCC_Version : constant Nat := get_gcc_version;
1660 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
1661 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.