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1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- O P T --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 1992-2004, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 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, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
21 -- --
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. --
28 -- --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
31 -- --
32 ------------------------------------------------------------------------------
34 -- This package contains global flags set by the initialization
35 -- routine from the command line and referenced throughout the compiler,
36 -- the binder, gnatmake or other GNAT tools. The comments indicate which
37 -- options are used by which programs (GNAT, GNATBIND, GNATMAKE, etc).
48 ----------------------------------------------
49 -- Settings of Modes for Current Processing --
50 ----------------------------------------------
52 -- The following mode values represent the current state of processing.
53 -- The values set here are the default values. Unless otherwise noted,
54 -- the value may be reset in Switch with an appropropiate switch. In
55 -- some cases, the values can also be modified by pragmas, and in the
56 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
57 -- the default values.
60 -- GNATBIND, GNATLINK
61 -- Set True if binder file to be generated in Ada rather than C
64 -- Versions of Ada for Ada_Version below. Note that these are ordered,
65 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
68 -- GNAT
69 -- Default Ada version if no switch given
72 -- GNAT
73 -- Current Ada version for compiler
77 -- GNATBIND
78 -- The name of the procedure that performs the finalization at the end of
79 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
81 Ada_Init_Suffix : constant String := "init";
83 -- GNATBIND
84 -- The name of the procedure that performs initialization at the start
85 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
88 -- GNATBIND
89 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
90 -- can be referenced in a uniform manner to create either the default
91 -- value of Ada_Main_Name (declared below), or the non-default name
92 -- set by Gnatbind.Scan_Bind_Arg.
95 -- GNATBIND
96 -- The name of the Ada package generated by the binder (when in Ada mode).
97 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
99 Address_Clause_Overlay_Warnings : Boolean := True;
100 -- GNAT
101 -- Set False to disable address clause warnings
103 All_Errors_Mode : Boolean := False;
104 -- GNAT
105 -- Flag set to force display of multiple errors on a single line and
106 -- also repeated error messages for references to undefined identifiers
107 -- and certain other repeated error messages.
109 All_Sources : Boolean := False;
110 -- GNATBIND
111 -- Set to True to require all source files to be present. This flag is
112 -- directly modified by gnatmake to affect the shared binder routines.
114 Alternate_Main_Name : String_Ptr := null;
115 -- GNATBIND
116 -- Set to non null when Bind_Alternate_Main_Name is True. This value
117 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
119 Assertions_Enabled : Boolean := False;
120 -- GNAT
121 -- Enable assertions made using pragma Assert.
123 ASIS_Mode : Boolean := False;
124 -- GNAT
125 -- Enable semantic checks and tree transformations that are important
126 -- for ASIS but that are usually skipped if Operating_Mode is set to
127 -- Check_Semantics. This flag does not have the corresponding option to set
128 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
129 -- from the code of GNSA-based tool (a client may need to set ON the
130 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
131 -- make very much sense, because GNSA can not do back annotation).
133 Back_Annotate_Rep_Info : Boolean := False;
134 -- GNAT
135 -- If set True, enables back annotation of representation information
136 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
137 -- (list representation information) or -gnatt (generate tree). It is
138 -- also set true if certain Unchecked_Conversion instantiations require
139 -- checking based on annotated values.
141 Bind_Alternate_Main_Name : Boolean := False;
142 -- GNATBIND
143 -- True if main should be called Alternate_Main_Name.all.
144 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
146 Bind_Main_Program : Boolean := True;
147 -- GNATBIND
148 -- Set to False if not binding main Ada program.
150 Bind_For_Library : Boolean := False;
151 -- GNATBIND
152 -- Set to True if the binder needs to generate a file designed for
153 -- building a library. May be set to True by Gnatbind.Scan_Bind_Arg.
155 Bind_Only : Boolean := False;
156 -- GNATMAKE
157 -- Set to True to skip compile and link steps
158 -- (except when Compile_Only and/or Link_Only are True).
160 Blank_Deleted_Lines : Boolean := False;
161 -- GNAT, GNATPREP
162 -- Output empty lines for each line of preprocessed input that is deleted
165 Brief_Output : Boolean := False;
166 -- GNAT, GNATBIND
167 -- Force brief error messages to standard error, even if verbose mode is
168 -- set (so that main error messages go to standard output).
170 Build_Bind_And_Link_Full_Project : Boolean := False;
171 -- GNATMAKE
172 -- Set to True to build, bind and link all the sources of a project file
173 -- (switch -B)
175 Check_Object_Consistency : Boolean := False;
176 -- GNATBIND, GNATMAKE
177 -- Set to True to check whether every object file is consistent with
178 -- its corresponding ada library information (ALI) file. An object
179 -- file is inconsistent with the corresponding ALI file if the object
180 -- file does not exist or if it has an older time stamp than the ALI file.
181 -- Default above is for GNATBIND. GNATMAKE overrides this default to
182 -- True (see Make.Initialize) since we normally do need to check source
183 -- consistencies in gnatmake.
185 Check_Only : Boolean := False;
186 -- GNATBIND
187 -- Set to True to do checks only, no output of binder file.
189 Check_Readonly_Files : Boolean := False;
190 -- GNATMAKE
191 -- Set to True to check readonly files during the make process.
193 Check_Source_Files : Boolean := True;
194 -- GNATBIND, GNATMAKE
195 -- Set to True to enable consistency checking for any source files that
196 -- are present (i.e. date must match the date in the library info file).
197 -- Set to False for object file consistency check only. This flag is
198 -- directly modified by gnatmake, to affect the shared binder routines.
200 Check_Switches : Boolean := False;
201 -- GNATMAKE
202 -- Set to True to check compiler options during the make process.
204 Check_Unreferenced : Boolean := False;
205 -- GNAT
206 -- Set to True to enable checking for unreferenced entities other
207 -- than formal parameters (for which see Check_Unreferenced_Formals)
209 Check_Unreferenced_Formals : Boolean := False;
210 -- GNAT
211 -- Set True to check for unreferenced formals. This is turned
212 -- on by -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
214 Check_Withs : Boolean := False;
215 -- GNAT
216 -- Set to True to enable checking for unused withs, and also the case
217 -- of withing a package and using none of the entities in the package.
219 Comment_Deleted_Lines : Boolean := False;
220 -- GNATPREP
221 -- True if source lines removed by the preprocessor should be commented
222 -- in the output file.
224 Compile_Only : Boolean := False;
225 -- GNATMAKE, GNATCLEAN
226 -- GNATMAKE: set to True to skip bind and link steps (except when
227 -- Bind_Only is True).
228 -- GNATCLEAN: set to True to only the files produced by the compiler are to
229 -- be deleted, but not the library files or executable files.
231 Config_File : Boolean := True;
232 -- GNAT
233 -- Set to False to inhibit reading and processing of gnat.adc file
235 Config_File_Names : String_List_Access := null;
236 -- GNAT
237 -- Names of configuration pragmas files (given by switches -gnatec)
239 Configurable_Run_Time_Mode : Boolean := False;
240 -- GNAT, GNATBIND
241 -- Set True if the compiler is operating in configurable run-time mode.
242 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
243 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
244 -- for details on the handling of the latter pragma.
246 Constant_Condition_Warnings : Boolean := False;
247 -- GNAT
248 -- Set to True to activate warnings on constant conditions
250 Create_Mapping_File : Boolean := False;
251 -- GNATMAKE
252 -- Set to True (-C switch) to indicate that gnatmake will invoke
253 -- the compiler with a mapping file (-gnatem compiler switch).
255 subtype Debug_Level_Value is Nat range 0 .. 3;
256 Debugger_Level : Debug_Level_Value := 0;
257 -- GNATBIND
258 -- The value given to the -g parameter. The default value for -g with
259 -- no value is 2. This is usually ignored by GNATBIND, except in the
260 -- VMS version where it is passed as an argument to __gnat_initialize
261 -- to trigger the activation of the remote debugging interface.
262 -- Is this still true ???
264 Debug_Generated_Code : Boolean := False;
265 -- GNAT
266 -- Set True (-gnatD switch) to debug generated expanded code instead
267 -- of the original source code. Causes debugging information to be
268 -- written with respect to the generated code file that is written.
270 Default_Sec_Stack_Size : Int := -1;
271 -- GNATBIND
272 -- Set to default secondary stack size in units of kilobytes. Set by
273 -- the -Dnnn switch for the binder. A value of -1 indicates that no
274 -- default was set by the binder, and that the default should be the
275 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
277 Detect_Blocking : Boolean := False;
278 -- GNAT
279 -- Set True to force the run time to raise Program_Error if calls to
280 -- potentially blocking operations are detected from protected actions.
282 Display_Compilation_Progress : Boolean := False;
283 -- GNATMAKE
284 -- Set True (-d switch) to display information on progress while compiling
285 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
287 type Distribution_Stub_Mode_Type is
288 -- GNAT
289 (No_Stubs,
290 -- Normal mode, no generation/compilation of distribution stubs
292 Generate_Receiver_Stub_Body,
293 -- The unit being compiled is the RCI body, and the compiler will
294 -- generate the body for the receiver stubs and compile it.
296 Generate_Caller_Stub_Body);
297 -- The unit being compiled is the RCI spec, and the compiler will
298 -- generate the body for the caller stubs and compile it.
300 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
301 -- GNAT
302 -- This enumeration variable indicates the five states of distribution
303 -- annex stub generation/compilation.
305 Do_Not_Execute : Boolean := False;
306 -- GNATMAKE
307 -- Set to True if no actual compilations should be undertaken.
309 Dynamic_Elaboration_Checks : Boolean := False;
310 -- GNAT
311 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
312 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
314 Elab_Dependency_Output : Boolean := False;
315 -- GNATBIND
316 -- Set to True to output complete list of elaboration constraints
318 Elab_Order_Output : Boolean := False;
319 -- GNATBIND
320 -- Set to True to output chosen elaboration order
322 Elab_Warnings : Boolean := False;
323 -- GNAT
324 -- Set to True to generate full elaboration warnings (-gnatwl)
326 Enable_Overflow_Checks : Boolean := False;
327 -- GNAT
328 -- Set to True if -gnato (enable overflow checks) switch is set,
329 -- but not -gnatp.
331 Exception_Locations_Suppressed : Boolean := False;
332 -- GNAT
333 -- This flag is set True if a Suppress_Exception_Locations configuration
334 -- pragma is currently active.
336 type Exception_Mechanism_Type is
337 -- Determines the handling of exceptions. See Exp_Ch11 for details
338 --
339 (Front_End_Setjmp_Longjmp_Exceptions,
340 -- Exceptions use setjmp/longjmp generated explicitly by the
341 -- front end (this includes gigi or other equivalent parts of
342 -- the code generator). AT END handlers are converted into
343 -- exception handlers by the front end in this mode.
345 Front_End_ZCX_Exceptions,
346 -- Exceptions use the zero cost table mechanism with explicit
347 -- tables and exception regions generated by the front end.
348 -- AT END handlers are converted into exception handlers by
349 -- the front end in this mode.
351 Back_End_ZCX_Exceptions);
352 -- Exceptions are handled by the back end. The front end simply
353 -- generates the handlers as they appear in the source, and AT
354 -- END handlers are left untouched (they are not converted into
355 -- exception handlers when operating in this mode. Note that the
356 -- name includes ZCX, since the expectation is that the back end
357 -- mechanism will in fact be a ZCX approach, but nothing in the
358 -- compiler depends on this, so for example if GNAT is run with
359 -- a version of GCC configured for setjmp/longjmp exception handling,
360 -- then everything will work fine.
361 pragma Convention (C, Exception_Mechanism_Type);
363 Exception_Mechanism : Exception_Mechanism_Type :=
364 Front_End_Setjmp_Longjmp_Exceptions;
365 -- GNAT
366 -- Set to the appropriate value depending on the default as given in
367 -- system.ads (ZCX_By_Default, GCC_ZCX_Support, Front_End_ZCX_Support)
368 -- and the use of -gnatL -gnatZ (and -gnatdX). The C convention is
369 -- there to make this variable accessible to gigi.
371 Exception_Tracebacks : Boolean := False;
372 -- GNATBIND
373 -- Set to True to store tracebacks in exception occurrences (-E)
375 Extensions_Allowed : Boolean := False;
376 -- GNAT
377 -- Set to True by switch -gnatX if GNAT specific language extensions
378 -- are allowed. For example, "limited with" is a GNAT extension.
380 type External_Casing_Type is (
381 As_Is, -- External names cased as they appear in the Ada source
382 Uppercase, -- External names forced to all uppercase letters
383 Lowercase); -- External names forced to all lowercase letters
385 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
386 -- GNAT
387 -- The setting of this flag determines the casing of external names
388 -- when the name is implicitly derived from an entity name (i.e. either
389 -- no explicit External_Name or Link_Name argument is used, or, in the
390 -- case of extended DEC pragmas, the external name is given using an
391 -- identifier. The As_Is setting is not permitted here (since this would
392 -- create Ada source programs that were case sensitive).
394 External_Name_Exp_Casing : External_Casing_Type := As_Is;
395 -- GNAT
396 -- The setting of this flag determines the casing of an external name
397 -- specified explicitly with a string literal. As_Is means the string
398 -- literal is used as given with no modification to the casing. If
399 -- Lowercase or Uppercase is set, then the string is forced to all
400 -- lowercase or all uppercase letters as appropriate. Note that this
401 -- setting has no effect if the external name is given using an identifier
402 -- in the case of extended DEC import/export pragmas (in this case the
403 -- casing is controlled by External_Name_Imp_Casing), and also has no
404 -- effect if an explicit Link_Name is supplied (a link name is always
405 -- used exactly as given).
407 External_Unit_Compilation_Allowed : Boolean := False;
408 -- GNATMAKE
409 -- When True (set by gnatmake switch -x), allow compilation of sources
410 -- that are not part of any project file.
413 -- GNAT
414 -- A non-blank value indicates that a Float_Format pragma has been
417 -- versions of GNAT.
420 -- GNAT
421 -- A non-blank value indicates that a Long_Float pragma has been
422 -- processed (this pragma is recognized only in OpenVMS versions
423 -- of GNAT), in which case this variable is set to D or G for
424 -- D_Float or G_Float.
426 Force_ALI_Tree_File : Boolean := False;
427 -- GNAT
428 -- Force generation of ALI file even if errors are encountered.
429 -- Also forces generation of tree file if -gnatt is also set.
431 Force_Checking_Of_Elaboration_Flags : Boolean := False;
432 -- GNATBIND
433 -- True if binding with forced checking of the elaboration flags
434 -- (-F switch set).
436 Force_Compilations : Boolean := False;
437 -- GNATMAKE
438 -- Set to force recompilations even when the objects are up-to-date.
440 Force_RM_Elaboration_Order : Boolean := False;
441 -- GNATBIND
442 -- True if binding with forced RM elaboration order (-f switch set)
443 -- Note: this is considered an obsolescent option, to be removed in
444 -- some future release. It is no longer documented. The proper way
445 -- to get this effect is to use -gnatE and suppress elab checks.
447 Full_Path_Name_For_Brief_Errors : Boolean := False;
448 -- GNAT, GNATMAKE, GNATCLEAN
449 -- When True, in Brief_Output mode, each error message line
450 -- will start with the full path name of the source.
451 -- When False, only the file name without directory information
452 -- is used.
454 Full_List : Boolean := False;
455 -- GNAT
456 -- Set True to generate full source listing with embedded errors
458 function get_gcc_version return Int;
459 pragma Import (C, get_gcc_version, "get_gcc_version");
461 GCC_Version : constant Nat := get_gcc_version;
462 -- GNATMAKE
463 -- Indicates which version of gcc is in use (2 = 2.8.1, 3 = 3.x).
465 Global_Discard_Names : Boolean := False;
466 -- GNAT, GNATBIND
467 -- Set true if a pragma Discard_Names applies to the current unit
469 GNAT_Mode : Boolean := False;
470 -- GNAT
471 -- True if compiling in GNAT system mode (-gnatg switch)
473 HLO_Active : Boolean := False;
474 -- GNAT
475 -- True if High Level Optimizer is activated (-gnatH switch)
477 Implementation_Unit_Warnings : Boolean := True;
478 -- GNAT
479 -- Set True to active warnings for use of implementation internal units.
480 -- Can be controlled by use of -gnatwi/-gnatwI.
482 Identifier_Character_Set : Character;
483 -- GNAT
484 -- This variable indicates the character set to be used for identifiers.
485 -- The possible settings are:
497 --
498 -- The setting affects the set of letters allowed in identifiers and the
499 -- upper/lower case equivalences. It does not affect the interpretation of
500 -- character and string literals, which are always stored using the actual
501 -- coding in the source program. This variable is initialized to the
502 -- default value appropriate to the system (in Osint.Initialize), and then
503 -- reset if a command line switch is used to change the setting.
505 Ineffective_Inline_Warnings : Boolean := False;
506 -- GNAT
507 -- Set True to activate warnings if front-end inlining (-gnatN) is not
508 -- able to actually inline a particular call (or all calls). Can be
509 -- controlled by use of -gnatwp/-gnatwP.
511 Init_Or_Norm_Scalars : Boolean := False;
512 -- GNAT, GANTBIND
513 -- Set True if a pragma Initialize_Scalars applies to the current unit.
514 -- Also set True if a pragma Normalize_Scalars applies.
516 Initialize_Scalars : Boolean := False;
517 -- GNAT
518 -- Set True if a pragma Initialize_Scalars applies to the current unit.
519 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
523 -- GNATBIND
524 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
525 -- is IN (invalid values), used if no -S switch is used.
527 Inline_Active : Boolean := False;
528 -- GNAT
529 -- Set True to activate pragma Inline processing across modules. Default
530 -- for now is not to inline across module boundaries.
532 Interface_Library_Unit : Boolean := False;
533 -- GNATBIND
534 -- Set to True to indicate that at least one ALI file is an interface ALI:
535 -- then elaboration flag checks are to be generated in the binder
536 -- generated file.
538 Follow_Links : Boolean := False;
539 -- GNATMAKE
540 -- Set to True (-eL) to process the project files in trusted mode
542 Front_End_Inlining : Boolean := False;
543 -- GNAT
544 -- Set True to activate inlining by front-end expansion.
546 Inline_Processing_Required : Boolean := False;
547 -- GNAT
548 -- Set True if inline processing is required. Inline processing is
549 -- required if an active Inline pragma is processed. The flag is set
550 -- for a pragma Inline or Inline_Always that is actually active.
552 In_Place_Mode : Boolean := False;
553 -- GNATMAKE
554 -- Set True to store ALI and object files in place ie in the object
555 -- directory if these files already exist or in the source directory
556 -- if not.
558 Keep_Going : Boolean := False;
559 -- GNATMAKE
560 -- When True signals gnatmake to ignore compilation errors and keep
561 -- processing sources until there is no more work.
563 Keep_Temporary_Files : Boolean := False;
564 -- GNATCMD
565 -- When True the temporary files created by the GNAT driver are not
566 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
568 Link_Only : Boolean := False;
569 -- GNATMAKE
570 -- Set to True to skip compile and bind steps
571 -- (except when Bind_Only is set to True).
573 List_Restrictions : Boolean := False;
574 -- GNATBIND
575 -- Set to True to list restrictions pragmas that could apply to partition
577 List_Units : Boolean := False;
578 -- GNAT
579 -- List units in the active library for a compilation (-gnatu switch)
581 List_Dependencies : Boolean := False;
582 -- GNATMAKE
583 -- When True gnatmake verifies that the objects are up to date and
584 -- outputs the list of object dependencies (-M switch).
585 -- Output depends if -a switch is used or not.
586 -- This list can be used directly in a Makefile.
588 List_Representation_Info : Int range 0 .. 3 := 0;
589 -- GNAT
590 -- Set non-zero by -gnatR switch to list representation information.
591 -- The settings are as follows:
592 --
593 -- 0 = no listing of representation information (default as above)
594 -- 1 = list rep info for user defined record and array types
595 -- 2 = list rep info for all user defined types and objects
596 -- 3 = like 2, but variable fields are decoded symbolically
598 List_Representation_Info_To_File : Boolean := False;
599 -- GNAT
600 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3
601 -- to be written to file.rep (where file is the name of the source
602 -- file) instead of stdout. For example, if file x.adb is compiled
603 -- using -gnatR2s then representation info is written to x.adb.ref.
605 List_Representation_Info_Mechanisms : Boolean := False;
606 -- GNAT
607 -- Set true by -gnatRm switch. Causes information on mechanisms to
608 -- be included in the representation output information.
610 List_Preprocessing_Symbols : Boolean := False;
611 -- GNAT, GNATPREP
612 -- Set to True if symbols for preprocessing a source are to be listed
613 -- before preprocessing occurs. Set to True by switch -s of gnatprep
614 -- or -s in preprocessing data file for the compiler.
616 type Creat_Repinfo_File_Proc is access procedure (Src : File_Name_Type);
617 type Write_Repinfo_Line_Proc is access procedure (Info : String);
618 type Close_Repinfo_File_Proc is access procedure;
619 -- Types used for procedure addresses below
621 Creat_Repinfo_File_Access : Creat_Repinfo_File_Proc := null;
622 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
623 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
624 -- GNAT
625 -- These three locations are left null when operating in non-compiler
626 -- (e.g. ASIS mode), but when operating in compiler mode, they are
627 -- set to point to the three corresponding procedures in Osint. The
628 -- reason for this slightly strange interface is to prevent Repinfo
629 -- from dragging in Osint in ASIS mode, which would include a lot of
630 -- unwanted units in the ASIS build.
633 -- GNAT, GNATBIND
635 -- Reset to first character (uppercase) of locking policy name if a
636 -- valid pragma Locking_Policy is encountered.
638 Locking_Policy_Sloc : Source_Ptr := No_Location;
639 -- GNAT, GNATBIND
640 -- Remember location of previous Locking_Policy pragma. This is used
641 -- for inconsistency error messages. A value of System_Location is
642 -- used if the policy is set in package System.
644 Look_In_Primary_Dir : Boolean := True;
645 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
646 -- Set to False if a -I- was present on the command line.
647 -- When True we are allowed to look in the primary directory to locate
648 -- other source or library files.
650 Make_Steps : Boolean := False;
651 -- GNATMAKE
652 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
653 -- set to True.
655 Main_Index : Int := 0;
656 -- GNATMAKE
657 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
658 -- the main program is the nnn unit in a multi-unit source file.
660 Mapping_File_Name : String_Ptr := null;
661 -- GNAT
662 -- File name of mapping between unit names, file names and path names.
663 -- (given by switch -gnatem)
665 Maximum_Errors : Int := 9999;
666 -- GNAT, GNATBIND
667 -- Maximum default number of errors before compilation is terminated.
668 -- Can be overridden using -gnatm (GNAT) or -m (GNATBIND) switch.
670 Maximum_File_Name_Length : Int;
671 -- GNAT, GNATBIND
672 -- Maximum number of characters allowed in a file name, not counting the
673 -- extension, as set by the appropriate switch. If no switch is given,
674 -- then this value is initialized by Osint to the appropriate value.
676 Max_Line_Length : Int := Hostparm.Max_Line_Length;
677 -- This is a copy of Max_Line_Length used by the scanner. It is usually
678 -- set to be a copy of Hostparm.Max_Line_Length, and is used to check
679 -- the maximum line length in the scanner when style checking is inactive.
680 -- The only time it is set to a different value is during the scanning of
681 -- configuration pragma files, where we want to turn off all checking and
682 -- in particular we want to allow long lines. So we reset this value to
683 -- Column_Number'Last during scanning of configuration pragma files.
685 Maximum_Processes : Positive := 1;
686 -- GNATMAKE
687 -- Maximum number of processes that should be spawned to carry out
688 -- compilations.
690 Minimal_Recompilation : Boolean := False;
691 -- GNATMAKE
692 -- Set to True if minimal recompilation mode requested.
694 Multiple_Unit_Index : Int;
695 -- GNAT
696 -- This is set non-zero if the current unit is being compiled in multiple
697 -- unit per file mode, meaning that the current unit is selected from the
698 -- sequence of units in the current source file, using the value stored
699 -- in this variable (e.g. 2 = select second unit in file). A value of
700 -- zero indicates that we are in normal (one unit per file) mode.
702 No_Main_Subprogram : Boolean := False;
703 -- GNATMAKE, GNATBIND
704 -- Set to True if compilation/binding of a program without main
705 -- subprogram requested.
707 No_Run_Time_Mode : Boolean := False;
708 -- GNAT, GNATBIND
709 -- This flag is set True if a No_Run_Time pragma is encountered. See
710 -- spec of Rtsfind for a full description of handling of this pragma.
712 No_Stdinc : Boolean := False;
713 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
714 -- Set to True if no default source search dirs added to search list
716 No_Stdlib : Boolean := False;
717 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
718 -- Set to True if no default library search dirs added to search list
720 No_Strict_Aliasing : Boolean := False;
721 -- GNAT
722 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
724 Normalize_Scalars : Boolean := False;
725 -- GNAT, GNATBIND
726 -- Set True if a pragma Normalize_Scalars applies to the current unit.
727 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
729 Object_Directory_Present : Boolean := False;
730 -- GNATMAKE
731 -- Set to True when an object directory is specified with option -D
733 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
734 Operating_Mode : Operating_Mode_Type := Generate_Code;
735 -- GNAT
736 -- Indicates the operating mode of the compiler. The default is generate
737 -- code, which runs the parser, semantics and backend. Switches can be
738 -- used to set syntax checking only mode, or syntax and semantics checking
739 -- only mode. Operating_Mode can also be modified as a result of detecting
740 -- errors during the compilation process. In particular if any serious
741 -- error is detected then this flag is reset from Generate_Code to
742 -- Check_Semantics after generating an error message.
744 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
745 -- GNAT
746 -- Indicates the original operating mode of the compiler as set by
747 -- compiler options. This is identical to Operating_Mode except that
748 -- this is not affected by errors.
750 Optimization_Level : Int;
751 pragma Import (C, Optimization_Level, "optimize");
752 -- This constant reflects the optimization level (0,1,2 for -O0,-O1,-O2)
754 Output_File_Name_Present : Boolean := False;
755 -- GNATBIND, GNAT, GNATMAKE
756 -- Set to True when the output C file name is given with option -o
757 -- for GNATBIND, when the object file name is given with option
758 -- -gnatO for GNAT or when the executable is given with option -o
759 -- for GNATMAKE.
761 Output_Linker_Option_List : Boolean := False;
762 -- GNATBIND
763 -- True if output of list of linker options is requested (-K switch set)
765 Output_Object_List : Boolean := False;
766 -- GNATBIND
767 -- True if output of list of objects is requested (-O switch set)
769 Pessimistic_Elab_Order : Boolean := False;
770 -- GNATBIND
771 -- True if pessimistic elaboration order is to be chosen (-p switch set)
773 Polling_Required : Boolean := False;
774 -- GNAT
775 -- Set to True if polling for asynchronous abort is enabled by using
776 -- the -gnatP option for GNAT.
778 Preprocessing_Data_File : String_Ptr := null;
779 -- GNAT
780 -- Set by switch -gnatep=. The file name of the prepocessing data file.
782 Print_Generated_Code : Boolean := False;
783 -- GNAT
784 -- Set to True to enable output of generated code in source form. This
785 -- flag is set by the -gnatG switch.
787 Print_Standard : Boolean := False;
788 -- GNAT
789 -- Set to true to enable printing of package standard in source form.
790 -- This flag is set by the -gnatS switch
792 Propagate_Exceptions : Boolean := False;
793 -- GNAT
794 -- Indicates if subprogram descriptor exception tables should be
795 -- built for imported subprograms. Set True if a Propagate_Exceptions
796 -- pragma applies to the extended main unit.
798 type Usage is (Unknown, Not_In_Use, In_Use);
799 Project_File_In_Use : Usage := Unknown;
800 -- GNAT
801 -- Indicates if a project file is used or not.
802 -- Set to In_Use by the first SFNP pragma.
805 -- GNAT, GNATBIND
807 -- Reset to first character (uppercase) of locking policy name if a valid
808 -- Queuing_Policy pragma is encountered.
810 Queuing_Policy_Sloc : Source_Ptr := No_Location;
811 -- GNAT, GNATBIND
812 -- Remember location of previous Queuing_Policy pragma. This is used
813 -- for inconsistency error messages. A value of System_Location is
814 -- used if the policy is set in package System.
816 Quiet_Output : Boolean := False;
817 -- GNATMAKE, GNATCLEAN, GPR2MAKE
818 -- Set to True if the tool should not have any output if there are no
819 -- errors or warnings.
821 RTS_Lib_Path_Name : String_Ptr := null;
822 RTS_Src_Path_Name : String_Ptr := null;
823 -- GNAT
824 -- Set to the "adalib" and "adainclude" directories of the run time
825 -- specified by --RTS=.
827 RTS_Switch : Boolean := False;
828 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
829 -- Set to True when the --RTS switch is set
831 Run_Path_Option : Boolean := True;
832 -- GNATMAKE, GNATLINK
833 -- Set to False when no run_path_option should be issued to the linker
835 Sec_Stack_Used : Boolean := False;
836 -- GNAT, GBATBIND
837 -- Set True if generated code uses the System.Secondary_Stack package.
838 -- For the binder, set if any unit uses the secondary stack package.
840 Setup_Projects : Boolean := False;
841 -- GNAT DRIVER
842 -- Set to True for GNAT SETUP: the Project Manager creates non existing
843 -- object, library and exec directories.
845 Shared_Libgnat : Boolean;
846 -- GNATBIND
847 -- Set to True if a shared libgnat is requested by using the -shared
848 -- option for GNATBIND and to False when using the -static option. The
849 -- value of this flag is set by Gnatbind.Scan_Bind_Arg.
851 Stack_Checking_Enabled : Boolean;
852 -- GNAT
853 -- Set to indicate if -fstack-check switch is set for the compilation.
854 -- True means that the switch is set, so that stack checking is enabled.
855 -- False means that the switch is not set (no stack checking). This
856 -- value is obtained from the external imported value flag_stack_check
857 -- in the gcc backend (see Frontend) and may be referenced throughout
858 -- the compilation phases.
860 Style_Check : Boolean := False;
861 -- GNAT
862 -- Set True to perform style checks. Activates checks carried out
863 -- in package Style (see body of this package for details of checks)
864 -- This flag is set True by either the -gnatg or -gnaty switches.
866 System_Extend_Pragma_Arg : Node_Id := Empty;
867 -- GNAT
868 -- Set non-empty if and only if a correct Extend_System pragma was present
869 -- in which case it points to the argument of the pragma, and the name can
870 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
872 System_Extend_Unit : Node_Id := Empty;
873 -- GNAT
874 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
875 -- is never appropriate in GNAT_Mode (and causes troubles, including
876 -- bogus circularities, if we try to compile the run-time library with
877 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
878 -- is a copy of the value set in System_Extend_Pragma_Ary.
880 Subunits_Missing : Boolean := False;
881 -- GNAT
882 -- This flag is set true if missing subunits are detected with code
883 -- generation active. This causes code generation to be skipped.
885 Suppress_Checks : Boolean := False;
886 -- GNAT
887 -- Set to True if -gnatp (suppress all checks) switch present.
889 Suppress_Options : Suppress_Array;
890 -- GNAT
891 -- Flags set True to suppress corresponding check, i.e. add an implicit
892 -- pragma Suppress at the outer level of each unit compiled. Note that
893 -- these suppress actions can be overridden by the use of the Unsuppress
894 -- pragma. This variable is initialized by Osint.Initialize.
896 Suppress_Back_Annotation : Boolean := False;
897 -- GNAT
898 -- This flag is set True if back annotation of representation information
899 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
900 -- This avoids unnecessary time being spent on back annotation.
902 Table_Factor : Int := 1;
903 -- GNAT
904 -- Factor by which all initial table sizes set in Alloc are multiplied.
905 -- Used in Table to calculate initial table sizes (the initial table
906 -- size is the value in Alloc, used as the Table_Initial parameter
907 -- value, multiplied by the factor given here. The default value is
908 -- used if no -gnatT switch appears.
911 -- GNAT, GNATBIND
913 -- Reset to first character (uppercase) of task dispatching policy name
914 -- if a valid Task_Dispatching_Policy pragma is encountered.
916 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
917 -- GNAT, GNATBIND
918 -- Remember location of previous Task_Dispatching_Policy pragma. This is
919 -- used for inconsistency error messages. A value of System_Location is
920 -- used if the policy is set in package System.
922 Tasking_Used : Boolean := False;
923 -- Set True if any tasking construct is encountered. Used to activate the
924 -- output of the Q, L and T lines in ALI files.
926 Time_Slice_Set : Boolean := False;
927 -- GNATBIND
928 -- Set True if a pragma Time_Slice is processed in the main unit, or
929 -- if the -gnatTnn switch is present to set a time slice value.
931 Time_Slice_Value : Nat;
932 -- GNATBIND
933 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if a
934 -- Time_Slice pragma has been processed. Set to the time slice value
935 -- in microseconds. Negative values are stored as zero, and the value
936 -- is not larger than 1_000_000_000 (1000 seconds). Values larger than
937 -- this are reset to this maximum. This can also be set with the -gnatTnn
938 -- switch.
940 Tolerate_Consistency_Errors : Boolean := False;
941 -- GNATBIND
942 -- Tolerate time stamp and other consistency errors. If this flag is
943 -- set to True (-t), then inconsistencies result in warnings rather than
944 -- errors.
946 Tree_Output : Boolean := False;
947 -- GNAT
948 -- Set to True (-gnatt) to generate output tree file
950 Try_Semantics : Boolean := False;
951 -- GNAT
952 -- Flag set to force attempt at semantic analysis, even if parser errors
953 -- occur. This will probably cause blowups at this stage in the game. On
954 -- the other hand, most such blowups will be caught cleanly and simply
955 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
957 Undefined_Symbols_Are_False : Boolean := False;
958 -- GNAT, GNATPREP
959 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
960 -- file for the compiler. Indicates that while preprocessing sources,
961 -- symbols that are not defined have the value FALSE.
963 Unique_Error_Tag : Boolean := Tag_Errors;
964 -- GNAT
965 -- Indicates if error messages are to be prefixed by the string error:
966 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
968 Universal_Addressing_On_AAMP : Boolean := False;
969 -- GNAAMP
970 -- Indicates if library-level objects should be accessed and updated
971 -- using universal addressing instructions on the AAMP architecture.
972 -- This flag is set to True when pragma Universal_Data is given as
973 -- a configuration pragma.
975 Unreserve_All_Interrupts : Boolean := False;
976 -- GNAT, GNATBIND
977 -- Normally set False, set True if a valid Unreserve_All_Interrupts
978 -- pragma appears anywhere in the main unit for GNAT, or if any ALI
979 -- file has the corresponding attribute set in GNATBIND.
981 Upper_Half_Encoding : Boolean := False;
982 -- GNAT
983 -- Normally set False, indicating that upper half ASCII characters are
984 -- used in the normal way to represent themselves. If the wide character
985 -- encoding method uses the upper bit for this encoding, then this flag
986 -- is set True, and upper half characters in the source indicate the
987 -- start of a wide character sequence.
989 Usage_Requested : Boolean := False;
990 -- GNAT, GNATBIND, GNATMAKE
991 -- Set to True if -h (-gnath for the compiler) switch encountered
992 -- requesting usage information
994 Use_VADS_Size : Boolean := False;
995 -- GNAT
996 -- Set to True if a valid pragma Use_VADS_Size is processed
998 Validity_Checks_On : Boolean := True;
999 -- GNAT
1000 -- This flag determines if validity checking is on or off. The initial
1001 -- state is on, and the required default validity checks are active. The
1002 -- actual set of checks that is performed if Validity_Checks_On is set
1003 -- is defined by the switches in package Sem_Val. The Validity_Checks_On
1004 -- flag is controlled by pragma Validity_Checks (On | Off), and also
1005 -- some generated compiler code (typically code that has to do with
1006 -- validity check generation) is compiled with this flag set to False.
1007 -- This flag is set to False by the -gnatp switch.
1009 Verbose_Mode : Boolean := False;
1010 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATCHOP, GNATNAME,
1011 -- GNATCLEAN
1012 -- Set to True to get verbose mode (full error message text and location
1013 -- information sent to standard output, also header, copyright and summary)
1015 Warn_On_Constant : Boolean := False;
1016 -- GNAT
1017 -- Set to True to generate warnings for variables that could be declared
1018 -- as constants. Modified by use of -gnatwk/K.
1020 Warn_On_Dereference : Boolean := False;
1021 -- GNAT
1022 -- Set to True to generate warnings for implicit dereferences for array
1023 -- indexing and record component access. Modified by use of -gnatwd/D.
1025 Warn_On_Export_Import : Boolean := True;
1026 -- GNAT
1027 -- Set to True to generate warnings for suspicious use of export or
1028 -- import pragmas. Modified by use of -gnatwx/X.
1030 Warn_On_Hiding : Boolean := False;
1031 -- GNAT
1032 -- Set to True to generate warnings if a declared entity hides another
1033 -- entity. The default is that this warning is suppressed.
1035 Warn_On_Modified_Unread : Boolean := False;
1036 -- GNAT
1037 -- Set to True to generate warnings if a variable is assigned but is
1038 -- never read. The default is that this warning is suppressed.
1040 Warn_On_No_Value_Assigned : Boolean := True;
1041 -- GNAT
1042 -- Set to True to generate warnings if no value is ever assigned to a
1043 -- variable that is at least partially uninitialized. Set to false to
1044 -- suppress such warnings. The default is that such warnings are enabled.
1046 Warn_On_Obsolescent_Feature : Boolean := False;
1047 -- GNAT
1048 -- Set to True to generate warnings on use of any feature in Annex J
1049 -- or if a subprogram is called for which a pragma Obsolescent applies.
1051 Warn_On_Redundant_Constructs : Boolean := False;
1052 -- GNAT
1053 -- Set to True to generate warnings for redundant constructs (e.g. useless
1054 -- assignments/conversions). The default is that this warning is disabled.
1056 Warn_On_Unchecked_Conversion : Boolean := True;
1057 -- GNAT
1058 -- Set to True to generate warnings for unchecked conversions that may have
1059 -- non-portable semantics (e.g. because sizes of types differ). The default
1060 -- is that this warning is enabled.
1062 Warn_On_Unrecognized_Pragma : Boolean := True;
1063 -- GNAT
1064 -- Set to True to generate warnings for unrecognized pragmas. The default
1065 -- is that this warning is enabled.
1067 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1068 Warning_Mode : Warning_Mode_Type := Normal;
1069 -- GNAT, GNATBIND
1070 -- Controls treatment of warning messages. If set to Suppress, warning
1071 -- messages are not generated at all. In Normal mode, they are generated
1072 -- but do not count as errors. In Treat_As_Error mode, warning messages
1073 -- are generated and are treated as errors.
1075 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1076 -- GNAT
1077 -- Method used for encoding wide characters in the source program. See
1078 -- description of type in unit System.WCh_Con for a list of the methods
1079 -- that are currently supported. Note that brackets notation is always
1080 -- recognized in source programs regardless of the setting of this
1081 -- variable. The default setting causes only the brackets notation
1082 -- to be recognized. If this is the main unit, this setting also
1083 -- controls the output of the W=? parameter in the ALI file, which
1084 -- is used to provide the default for Wide_Text_IO files.
1086 Xref_Active : Boolean := True;
1087 -- GNAT
1088 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1090 Zero_Cost_Exceptions_Val : Boolean;
1091 Zero_Cost_Exceptions_Set : Boolean := False;
1092 -- GNAT
1093 -- These values are to record the setting of the zero cost exception
1094 -- handling mode set by argument switches (-gnatZ/-gnatL). If the
1095 -- value is set by one of these switches, then Zero_Cost_Exceptions_Set
1096 -- is set to True, and Zero_Cost_Exceptions_Val indicates the setting.
1098 ----------------------------
1099 -- Configuration Settings --
1100 ----------------------------
1102 -- These are settings that are used to establish the mode at the start
1103 -- of each unit. The values defined below can be affected either by
1104 -- command line switches, or by the use of appropriate configuration
1105 -- pragmas in the gnat.adc file.
1107 Ada_Version_Config : Ada_Version_Type;
1108 -- GNAT
1109 -- This is the value of the configuration switch for the Ada 83 mode, as
1110 -- set by the command line switches -gnat83/95/05, and possibly modified
1111 -- by the use of configuration pragmas Ada_83/Ada95/Ada05. This switch
1112 -- is used to set the initial value for Ada_Version mode at the start
1113 -- of analysis of a unit. Note however, that the setting of this flag
1114 -- is ignored for internal and predefined units (which are always compiled
1115 -- in the most up to date version of Ada).
1117 Dynamic_Elaboration_Checks_Config : Boolean := False;
1118 -- GNAT
1119 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1120 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1122 Exception_Locations_Suppressed_Config : Boolean := False;
1123 -- GNAT
1124 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1126 Extensions_Allowed_Config : Boolean;
1127 -- GNAT
1128 -- This is the flag that indicates whether extensions are allowed.
1129 -- It can be set True either by use of the -gnatX switch, or by use
1130 -- of the configuration pragma Extensions_Allowed (On). It is always
1131 -- set to True for internal GNAT units, since extensions are always
1132 -- permitted in such units.
1134 External_Name_Exp_Casing_Config : External_Casing_Type;
1135 -- GNAT
1136 -- This is the value of the configuration switch that controls casing
1137 -- of external symbols for which an explicit external name is given. It
1138 -- can be set to Uppercase by the command line switch -gnatF, and further
1139 -- modified by the use of the configuration pragma External_Name_Casing
1140 -- in the gnat.adc file. This flag is used to set the initial value
1141 -- for External_Name_Exp_Casing at the start of analyzing each unit.
1142 -- Note however that the setting of this flag is ignored for internal
1143 -- and predefined units (which are always compiled with As_Is mode).
1145 External_Name_Imp_Casing_Config : External_Casing_Type;
1146 -- GNAT
1147 -- This is the value of the configuration switch that controls casing
1148 -- of external symbols where the external name is implicitly given. It
1149 -- can be set to Uppercase by the command line switch -gnatF, and further
1150 -- modified by the use of the configuration pragma External_Name_Casing
1151 -- in the gnat.adc file. This flag is used to set the initial value
1152 -- for External_Name_Imp_Casing at the start of analyzing each unit.
1153 -- Note however that the setting of this flag is ignored for internal
1154 -- and predefined units (which are always compiled with Lowercase mode).
1156 Polling_Required_Config : Boolean;
1157 -- GNAT
1158 -- This is the value of the configuration switch that controls polling
1159 -- mode. It can be set True by the command line switch -gnatP, and then
1160 -- further modified by the use of pragma Polling in the gnat.adc file.
1161 -- This flag is used to set the initial value for Polling_Required
1162 -- at the start of analyzing each unit.
1164 Use_VADS_Size_Config : Boolean;
1165 -- GNAT
1166 -- This is the value of the configuration switch that controls the use
1167 -- of VADS_Size instead of Size whereever the attribute Size is used.
1168 -- It can be set True by the use of the pragma Use_VADS_Size in the
1169 -- gnat.adc file. This flag is used to set the initial value for
1170 -- Use_VADS_Size at the start of analyzing each unit. Note however that
1171 -- the setting of this flag is ignored for internal and predefined
1172 -- units (which are always compiled with the standard Size semantics).
1174 type Config_Switches_Type is private;
1175 -- Type used to save values of the switches set from Config values
1177 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1178 -- This procedure saves the current values of the switches which are
1179 -- initialized from the above Config values, and then resets these
1180 -- switches according to the Config value settings.
1182 procedure Set_Opt_Config_Switches (Internal_Unit : Boolean);
1183 -- This procedure sets the switches to the appropriate initial values.
1184 -- The parameter Internal_Unit is True for an internal or predefined
1185 -- unit, and affects the way the switches are set (see above).
1187 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1188 -- This procedure restores a set of switch values previously saved
1189 -- by a call to Save_Opt_Switches.
1191 procedure Register_Opt_Config_Switches;
1192 -- This procedure is called after processing the gnat.adc file to record
1193 -- the values of the Config switches, as possibly modified by the use
1194 -- of command line switches and configuration pragmas.
1196 ------------------------
1197 -- Other Global Flags --
1198 ------------------------
1200 Expander_Active : Boolean := False;
1201 -- A flag that indicates if expansion is active (True) or deactivated
1202 -- (False). When expansion is deactivated all calls to expander routines
1203 -- have no effect. Note that the initial setting of False is merely to
1204 -- prevent saving of an undefined value for an initial call to the
1205 -- Expander_Mode_Save_And_Set procedure. For more information on the
1206 -- use of this flag, see package Expander. Indeed this flag might more
1207 -- logically be in the spec of Expander, but it is referenced by Errout,
1208 -- and it really seems wrong for Errout to depend on Expander.
1210 -----------------------
1211 -- Tree I/O Routines --
1212 -----------------------
1214 procedure Tree_Read;
1215 -- Reads switch settings from current tree file using Tree_Read
1217 procedure Tree_Write;
1218 -- Writes out switch settings to current tree file using Tree_Write
1220 --------------------------
1221 -- ASIS Version Control --
1222 --------------------------
1224 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1225 -- are supposed to be used in the GNAT/ASIS version check performed in
1226 -- the ASIS code (this package is also a part of the ASIS implementation).
1227 -- They are set by Tree_Read procedure, so they represent the version
1228 -- number (and the version string) of the compiler which has created the
1229 -- tree, and they are supposed to be compared with the corresponding values
1230 -- from the Gnatvsn package which is a part of ASIS implementation.
1232 Tree_Version_String : String (Gnat_Version_String'Range);
1233 -- Used to store the compiler version string read from a tree file to
1234 -- check if it is the same as stored in the version string in Gnatvsn.
1235 -- Therefore its length is taken directly from the version string in
1236 -- Gnatvsn. If the length of the version string stored in the tree is
1237 -- different, then versions are for sure different, and a string containing
1240 Tree_ASIS_Version_Number : Int;
1241 -- Used to store the ASIS version number read from a tree file to check if
1242 -- it is the same as stored in the ASIS version number in Gnatvsn.
1244 private
1246 type Config_Switches_Type is record
1247 Ada_Version : Ada_Version_Type;
1248 Dynamic_Elaboration_Checks : Boolean;
1249 Exception_Locations_Suppressed : Boolean;
1250 Extensions_Allowed : Boolean;
1251 External_Name_Exp_Casing : External_Casing_Type;
1252 External_Name_Imp_Casing : External_Casing_Type;
1253 Polling_Required : Boolean;
1254 Use_VADS_Size : Boolean;
1255 end record;
1257 end Opt;