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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) 1992-2006, 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, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, 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 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).
47 ----------------------------------------------
48 -- Settings of Modes for Current Processing --
49 ----------------------------------------------
51 -- The following mode values represent the current state of processing.
52 -- The values set here are the default values. Unless otherwise noted,
53 -- the value may be reset in Switch-? with an appropropiate switch. In
54 -- some cases, the values can also be modified by pragmas, and in the
55 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
56 -- the default values.
59 -- GNATBIND, GNATLINK
60 -- 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.
66 -- The Warnings_Off pragma stops warnings for Ada_Version >= Ada_05,
67 -- which we want to allow, so that things work OK when Ada_15 is added!
68 -- This warning is now removed, so this pragma can be removed some time???
71 -- GNAT
72 -- Default Ada version if no switch given
75 -- GNAT
76 -- Current Ada version for compiler, as set by configuration pragmas,
77 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
78 -- predefined or internal file is compiled.
81 -- GNAT
82 -- Like Ada_Version, but does not get set implicitly for predefined
83 -- or internal units, so it reflects the Ada version explicitly set
84 -- using configuration pragmas or compiler switches (or if neither
85 -- appears, it remains set to Ada_Version_Default). This is used in
86 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
87 -- where in the run-time we want the explicit version set.
90 -- GNAT
91 -- Ada version used to compile the runtime. Used to set Ada_Version (but
92 -- not Ada_Version_Explicit) when compiling predefined or internal units.
96 -- GNATBIND
97 -- The name of the procedure that performs the finalization at the end of
98 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
100 Ada_Init_Suffix : constant String := "init";
102 -- GNATBIND
103 -- The name of the procedure that performs initialization at the start
104 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
107 -- GNATBIND
108 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
109 -- can be referenced in a uniform manner to create either the default
110 -- value of Ada_Main_Name (declared below), or the non-default name
111 -- set by Gnatbind.Scan_Bind_Arg.
114 -- GNATBIND
115 -- The name of the Ada package generated by the binder (when in Ada mode).
116 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
118 Address_Clause_Overlay_Warnings : Boolean := True;
119 -- GNAT
120 -- Set False to disable address clause warnings
122 Address_Is_Private : Boolean := False;
123 -- GNAT, GNATBIND
124 -- Set True if package System has the line "type Address is private;"
126 All_Errors_Mode : Boolean := False;
127 -- GNAT
128 -- Flag set to force display of multiple errors on a single line and
129 -- also repeated error messages for references to undefined identifiers
130 -- and certain other repeated error messages. Set by use of -gnatf.
132 All_Sources : Boolean := False;
133 -- GNATBIND
134 -- Set to True to require all source files to be present. This flag is
135 -- directly modified by gnatmake to affect the shared binder routines.
137 Alternate_Main_Name : String_Ptr := null;
138 -- GNATBIND
139 -- Set to non null when Bind_Alternate_Main_Name is True. This value
140 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
142 Assertions_Enabled : Boolean := False;
143 -- GNAT
144 -- Enable assertions made using pragma Assert
146 ASIS_Mode : Boolean := False;
147 -- GNAT
148 -- Enable semantic checks and tree transformations that are important
149 -- for ASIS but that are usually skipped if Operating_Mode is set to
150 -- Check_Semantics. This flag does not have the corresponding option to set
151 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
152 -- from the code of GNSA-based tool (a client may need to set ON the
153 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
154 -- make very much sense, because GNSA cannot do back annotation).
156 Back_Annotate_Rep_Info : Boolean := False;
157 -- GNAT
158 -- If set True, enables back annotation of representation information
159 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
160 -- (list representation information) or -gnatt (generate tree). It is
161 -- also set true if certain Unchecked_Conversion instantiations require
162 -- checking based on annotated values.
164 Bind_Alternate_Main_Name : Boolean := False;
165 -- GNATBIND
166 -- True if main should be called Alternate_Main_Name.all.
167 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
169 Bind_Main_Program : Boolean := True;
170 -- GNATBIND
171 -- Set to False if not binding main Ada program
173 Bind_For_Library : Boolean := False;
174 -- GNATBIND
175 -- Set to True if the binder needs to generate a file designed for
176 -- building a library. May be set to True by Gnatbind.Scan_Bind_Arg.
178 Bind_Only : Boolean := False;
179 -- GNATMAKE, GPRMAKE
180 -- Set to True to skip compile and link steps
181 -- (except when Compile_Only and/or Link_Only are True).
183 Blank_Deleted_Lines : Boolean := False;
184 -- GNAT, GNATPREP
185 -- Output empty lines for each line of preprocessed input that is deleted
188 Brief_Output : Boolean := False;
189 -- GNAT, GNATBIND
190 -- Force brief error messages to standard error, even if verbose mode is
191 -- set (so that main error messages go to standard output).
193 Build_Bind_And_Link_Full_Project : Boolean := False;
194 -- GNATMAKE
195 -- Set to True to build, bind and link all the sources of a project file
196 -- (switch -B)
198 Check_Object_Consistency : Boolean := False;
199 -- GNATBIND, GNATMAKE
200 -- Set to True to check whether every object file is consistent with
201 -- its corresponding ada library information (ALI) file. An object
202 -- file is inconsistent with the corresponding ALI file if the object
203 -- file does not exist or if it has an older time stamp than the ALI file.
204 -- Default above is for GNATBIND. GNATMAKE overrides this default to
205 -- True (see Make.Initialize) since we normally do need to check source
206 -- consistencies in gnatmake.
208 Check_Only : Boolean := False;
209 -- GNATBIND
210 -- Set to True to do checks only, no output of binder file
212 Check_Readonly_Files : Boolean := False;
213 -- GNATMAKE
214 -- Set to True to check readonly files during the make process
216 Check_Source_Files : Boolean := True;
217 -- GNATBIND, GNATMAKE
218 -- Set to True to enable consistency checking for any source files that
219 -- are present (i.e. date must match the date in the library info file).
220 -- Set to False for object file consistency check only. This flag is
221 -- directly modified by gnatmake, to affect the shared binder routines.
223 Check_Switches : Boolean := False;
224 -- GNATMAKE, GPRMAKE
225 -- Set to True to check compiler options during the make process
227 Check_Unreferenced : Boolean := False;
228 -- GNAT
229 -- Set to True to enable checking for unreferenced entities other
230 -- than formal parameters (for which see Check_Unreferenced_Formals)
232 Check_Unreferenced_Formals : Boolean := False;
233 -- GNAT
234 -- Set True to check for unreferenced formals. This is turned on by
235 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
237 Check_Withs : Boolean := False;
238 -- GNAT
239 -- Set to True to enable checking for unused withs, and also the case
240 -- of withing a package and using none of the entities in the package.
242 Commands_To_Stdout : Boolean := False;
243 -- GNATMAKE
244 -- True if echoed commands to be written to stdout instead of stderr
246 Comment_Deleted_Lines : Boolean := False;
247 -- GNATPREP
248 -- True if source lines removed by the preprocessor should be commented
249 -- in the output file.
251 Compile_Only : Boolean := False;
252 -- GNATMAKE, GNATCLEAN, GPRMAKE
253 -- GNATMAKE, GPRMAKE: set to True to skip bind and link steps (except when
254 -- Bind_Only is True).
255 -- GNATCLEAN: set to True to only the files produced by the compiler are to
256 -- be deleted, but not the library files or executable files.
258 Config_File : Boolean := True;
259 -- GNAT
260 -- Set to False to inhibit reading and processing of gnat.adc file
262 Config_File_Names : String_List_Access := null;
263 -- GNAT
264 -- Names of configuration pragmas files (given by switches -gnatec)
266 Configurable_Run_Time_Mode : Boolean := False;
267 -- GNAT, GNATBIND
268 -- Set True if the compiler is operating in configurable run-time mode.
269 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
270 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
271 -- for details on the handling of the latter pragma.
273 Constant_Condition_Warnings : Boolean := False;
274 -- GNAT
275 -- Set to True to activate warnings on constant conditions
277 Create_Mapping_File : Boolean := False;
278 -- GNATMAKE, GPRMAKE
279 -- Set to True (-C switch) to indicate that the compiler will be invoked
280 -- with a mapping file (-gnatem compiler switch).
282 Debug_Pragmas_Enabled : Boolean := False;
283 -- GNAT
284 -- Enable debug statements from pragma Debug
286 subtype Debug_Level_Value is Nat range 0 .. 3;
287 Debugger_Level : Debug_Level_Value := 0;
288 -- GNATBIND
289 -- The value given to the -g parameter. The default value for -g with
290 -- no value is 2. This is usually ignored by GNATBIND, except in the
291 -- VMS version where it is passed as an argument to __gnat_initialize
292 -- to trigger the activation of the remote debugging interface.
293 -- Is this still true ???
295 Debug_Generated_Code : Boolean := False;
296 -- GNAT
297 -- Set True (-gnatD switch) to debug generated expanded code instead
298 -- of the original source code. Causes debugging information to be
299 -- written with respect to the generated code file that is written.
301 Default_Exit_Status : Int := 0;
302 -- GNATBIND
303 -- Set the default exit status value. Set by the -Xnnn switch for the
304 -- binder.
306 Default_Stack_Size : Int := -1;
307 -- GNATBIND
308 -- Set to default primary stack size in units of bytes. Set by
309 -- the -dnnn switch for the binder. A value of -1 indicates that no
310 -- default was set by the binder.
312 Default_Sec_Stack_Size : Int := -1;
313 -- GNATBIND
314 -- Set to default secondary stack size in units of bytes. Set by
315 -- the -Dnnn switch for the binder. A value of -1 indicates that no
316 -- default was set by the binder, and that the default should be the
317 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
319 Detect_Blocking : Boolean := False;
320 -- GNAT
321 -- Set True to force the run time to raise Program_Error if calls to
322 -- potentially blocking operations are detected from protected actions.
324 Display_Compilation_Progress : Boolean := False;
325 -- GNATMAKE, GPRMAKE
326 -- Set True (-d switch) to display information on progress while compiling
327 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
329 type Distribution_Stub_Mode_Type is
330 -- GNAT
331 (No_Stubs,
332 -- Normal mode, no generation/compilation of distribution stubs
334 Generate_Receiver_Stub_Body,
335 -- The unit being compiled is the RCI body, and the compiler will
336 -- generate the body for the receiver stubs and compile it.
338 Generate_Caller_Stub_Body);
339 -- The unit being compiled is the RCI spec, and the compiler will
340 -- generate the body for the caller stubs and compile it.
342 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
343 -- GNAT
344 -- This enumeration variable indicates the five states of distribution
345 -- annex stub generation/compilation.
347 Do_Not_Execute : Boolean := False;
348 -- GNATMAKE
349 -- Set to True if no actual compilations should be undertaken.
351 Dump_Source_Text : Boolean := False;
352 -- GNAT
353 -- Set to True (by -gnatL) to dump source text intermingled with generated
354 -- code. Effective only if either of Debug/Print_Generated_Code is true.
356 Dynamic_Elaboration_Checks : Boolean := False;
357 -- GNAT
358 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
359 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
361 Dynamic_Stack_Measurement : Boolean := False;
362 -- GNATBIND
363 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
365 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
366 -- GNATBIND
367 -- Number of measurements we want to store during dynamic stack analysis.
368 -- When the buffer is full, non-storable results will be output on the fly.
369 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
370 -- by processing of -u flag for gnatbind.
372 Elab_Dependency_Output : Boolean := False;
373 -- GNATBIND
374 -- Set to True to output complete list of elaboration constraints
376 Elab_Order_Output : Boolean := False;
377 -- GNATBIND
378 -- Set to True to output chosen elaboration order
380 Elab_Warnings : Boolean := False;
381 -- GNAT
382 -- Set to True to generate full elaboration warnings (-gnatwl)
384 Enable_Overflow_Checks : Boolean := False;
385 -- GNAT
386 -- Set to True if -gnato (enable overflow checks) switch is set,
387 -- but not -gnatp.
389 Error_Msg_Line_Length : Nat := 0;
390 -- GNAT
391 -- Records the error message line length limit. If this is set to zero,
392 -- then we get the old style behavior, in which each call to the error
393 -- message routines generates one line of output as a separate message.
394 -- If it is set to a non-zero value, then continuation lines are folded
395 -- to make a single long message, and then this message is split up into
396 -- multiple lines not exceeding the specified length. Set by -gnatLnnn.
398 Exception_Locations_Suppressed : Boolean := False;
399 -- GNAT
400 -- This flag is set True if a Suppress_Exception_Locations configuration
401 -- pragma is currently active.
403 type Exception_Mechanism_Type is
404 -- Determines the handling of exceptions. See Exp_Ch11 for details
405 --
406 (Front_End_Setjmp_Longjmp_Exceptions,
407 -- Exceptions use setjmp/longjmp generated explicitly by the
408 -- front end (this includes gigi or other equivalent parts of
409 -- the code generator). AT END handlers are converted into
410 -- exception handlers by the front end in this mode.
412 Back_End_Exceptions);
413 -- Exceptions are handled by the back end. The front end simply
414 -- generates the handlers as they appear in the source, and AT
415 -- END handlers are left untouched (they are not converted into
416 -- exception handlers when operating in this mode.
417 pragma Convention (C, Exception_Mechanism_Type);
419 Exception_Mechanism : Exception_Mechanism_Type :=
420 Front_End_Setjmp_Longjmp_Exceptions;
421 -- GNAT
422 -- Set to the appropriate value depending on the default as given in
423 -- system.ads (ZCX_By_Default, GCC_ZCX_Support).
424 -- The C convention is there to make this variable accessible to gigi.
426 Exception_Tracebacks : Boolean := False;
427 -- GNATBIND
428 -- Set to True to store tracebacks in exception occurrences (-E)
430 Extensions_Allowed : Boolean := False;
431 -- GNAT
432 -- Set to True by switch -gnatX if GNAT specific language extensions
433 -- are allowed. For example, "limited with" is a GNAT extension.
435 type External_Casing_Type is (
436 As_Is, -- External names cased as they appear in the Ada source
437 Uppercase, -- External names forced to all uppercase letters
438 Lowercase); -- External names forced to all lowercase letters
440 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
441 -- GNAT
442 -- The setting of this flag determines the casing of external names
443 -- when the name is implicitly derived from an entity name (i.e. either
444 -- no explicit External_Name or Link_Name argument is used, or, in the
445 -- case of extended DEC pragmas, the external name is given using an
446 -- identifier. The As_Is setting is not permitted here (since this would
447 -- create Ada source programs that were case sensitive).
449 External_Name_Exp_Casing : External_Casing_Type := As_Is;
450 -- GNAT
451 -- The setting of this flag determines the casing of an external name
452 -- specified explicitly with a string literal. As_Is means the string
453 -- literal is used as given with no modification to the casing. If
454 -- Lowercase or Uppercase is set, then the string is forced to all
455 -- lowercase or all uppercase letters as appropriate. Note that this
456 -- setting has no effect if the external name is given using an identifier
457 -- in the case of extended DEC import/export pragmas (in this case the
458 -- casing is controlled by External_Name_Imp_Casing), and also has no
459 -- effect if an explicit Link_Name is supplied (a link name is always
460 -- used exactly as given).
462 External_Unit_Compilation_Allowed : Boolean := False;
463 -- GNATMAKE
464 -- When True (set by gnatmake switch -x), allow compilation of sources
465 -- that are not part of any project file.
468 -- GNAT
469 -- A non-blank value indicates that a Float_Format pragma has been
472 -- versions of GNAT.
475 -- GNAT
476 -- A non-blank value indicates that a Long_Float pragma has been
477 -- processed (this pragma is recognized only in OpenVMS versions
478 -- of GNAT), in which case this variable is set to D or G for
479 -- D_Float or G_Float.
481 Force_ALI_Tree_File : Boolean := False;
482 -- GNAT
483 -- Force generation of ALI file even if errors are encountered.
484 -- Also forces generation of tree file if -gnatt is also set.
486 Force_Checking_Of_Elaboration_Flags : Boolean := False;
487 -- GNATBIND
488 -- True if binding with forced checking of the elaboration flags
489 -- (-F switch set).
491 Force_Compilations : Boolean := False;
492 -- GNATMAKE, GPRMAKE
493 -- Set to force recompilations even when the objects are up-to-date.
495 Full_Path_Name_For_Brief_Errors : Boolean := False;
496 -- GNAT, GNATMAKE, GNATCLEAN, GPRMAKE
497 -- When True, in Brief_Output mode, each error message line
498 -- will start with the full path name of the source.
499 -- When False, only the file name without directory information
500 -- is used.
502 Full_List : Boolean := False;
503 -- GNAT
504 -- Set True to generate full source listing with embedded errors
506 Full_List_File_Name : String_Ptr := null;
507 -- GNAT
508 -- Set to file name to generate full source listing to named file (or if
509 -- the name is of the form .xxx, then to name.xxx where name is the source
510 -- file name with extension stripped.
512 function get_gcc_version return Int;
513 pragma Import (C, get_gcc_version, "get_gcc_version");
515 GCC_Version : constant Nat := get_gcc_version;
516 -- GNATMAKE
517 -- Indicates which version of gcc is in use (2 = 2.8.1, 3 = 3.x)
519 Global_Discard_Names : Boolean := False;
520 -- GNAT, GNATBIND
521 -- Set true if a pragma Discard_Names applies to the current unit
523 GNAT_Mode : Boolean := False;
524 -- GNAT
525 -- True if compiling in GNAT system mode (-gnatg switch)
527 HLO_Active : Boolean := False;
528 -- GNAT
529 -- True if High Level Optimizer is activated (-gnatH switch)
531 Implementation_Unit_Warnings : Boolean := True;
532 -- GNAT
533 -- Set True to active warnings for use of implementation internal units.
534 -- Can be controlled by use of -gnatwi/-gnatwI.
536 Identifier_Character_Set : Character;
537 -- GNAT
538 -- This variable indicates the character set to be used for identifiers.
539 -- The possible settings are:
551 --
552 -- The setting affects the set of letters allowed in identifiers and the
553 -- upper/lower case equivalences. It does not affect the interpretation of
554 -- character and string literals, which are always stored using the actual
555 -- coding in the source program. This variable is initialized to the
556 -- default value appropriate to the system (in Osint.Initialize), and then
557 -- reset if a command line switch is used to change the setting.
559 Ineffective_Inline_Warnings : Boolean := False;
560 -- GNAT
561 -- Set True to activate warnings if front-end inlining (-gnatN) is not
562 -- able to actually inline a particular call (or all calls). Can be
563 -- controlled by use of -gnatwp/-gnatwP.
565 Init_Or_Norm_Scalars : Boolean := False;
566 -- GNAT, GANTBIND
567 -- Set True if a pragma Initialize_Scalars applies to the current unit.
568 -- Also set True if a pragma Normalize_Scalars applies.
570 Initialize_Scalars : Boolean := False;
571 -- GNAT
572 -- Set True if a pragma Initialize_Scalars applies to the current unit.
573 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
577 -- GNATBIND
578 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
579 -- is IN (invalid values), used if no -S switch is used.
581 Inline_Active : Boolean := False;
582 -- GNAT
583 -- Set True to activate pragma Inline processing across modules. Default
584 -- for now is not to inline across module boundaries.
586 Interface_Library_Unit : Boolean := False;
587 -- GNATBIND
588 -- Set to True to indicate that at least one ALI file is an interface ALI:
589 -- then elaboration flag checks are to be generated in the binder
590 -- generated file.
592 Follow_Links : Boolean := False;
593 -- GNATMAKE
594 -- Set to True (-eL) to process the project files in trusted mode
596 Front_End_Inlining : Boolean := False;
597 -- GNAT
598 -- Set True to activate inlining by front-end expansion
600 Inline_Processing_Required : Boolean := False;
601 -- GNAT
602 -- Set True if inline processing is required. Inline processing is
603 -- required if an active Inline pragma is processed. The flag is set
604 -- for a pragma Inline or Inline_Always that is actually active.
606 In_Place_Mode : Boolean := False;
607 -- GNATMAKE
608 -- Set True to store ALI and object files in place ie in the object
609 -- directory if these files already exist or in the source directory
610 -- if not.
612 Keep_Going : Boolean := False;
613 -- GNATMAKE, GPRMAKE
614 -- When True signals to ignore compilation errors and keep
615 -- processing sources until there is no more work.
617 Keep_Temporary_Files : Boolean := False;
618 -- GNATCMD
619 -- When True the temporary files created by the GNAT driver are not
620 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
622 Link_Only : Boolean := False;
623 -- GNATMAKE, GPRMAKE
624 -- Set to True to skip compile and bind steps
625 -- (except when Bind_Only is set to True).
627 List_Restrictions : Boolean := False;
628 -- GNATBIND
629 -- Set to True to list restrictions pragmas that could apply to partition
631 List_Units : Boolean := False;
632 -- GNAT
633 -- List units in the active library for a compilation (-gnatu switch)
635 List_Dependencies : Boolean := False;
636 -- GNATMAKE
637 -- When True gnatmake verifies that the objects are up to date and
638 -- outputs the list of object dependencies (-M switch).
639 -- Output depends if -a switch is used or not.
640 -- This list can be used directly in a Makefile.
642 List_Representation_Info : Int range 0 .. 3 := 0;
643 -- GNAT
644 -- Set non-zero by -gnatR switch to list representation information.
645 -- The settings are as follows:
646 --
647 -- 0 = no listing of representation information (default as above)
648 -- 1 = list rep info for user defined record and array types
649 -- 2 = list rep info for all user defined types and objects
650 -- 3 = like 2, but variable fields are decoded symbolically
652 List_Representation_Info_To_File : Boolean := False;
653 -- GNAT
654 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3
655 -- to be written to file.rep (where file is the name of the source
656 -- file) instead of stdout. For example, if file x.adb is compiled
657 -- using -gnatR2s then representation info is written to x.adb.ref.
659 List_Representation_Info_Mechanisms : Boolean := False;
660 -- GNAT
661 -- Set true by -gnatRm switch. Causes information on mechanisms to
662 -- be included in the representation output information.
664 List_Preprocessing_Symbols : Boolean := False;
665 -- GNAT, GNATPREP
666 -- Set to True if symbols for preprocessing a source are to be listed
667 -- before preprocessing occurs. Set to True by switch -s of gnatprep
668 -- or -s in preprocessing data file for the compiler.
670 type Create_Repinfo_File_Proc is access procedure (Src : File_Name_Type);
671 type Write_Repinfo_Line_Proc is access procedure (Info : String);
672 type Close_Repinfo_File_Proc is access procedure;
673 -- Types used for procedure addresses below
675 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
676 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
677 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
678 -- GNAT
679 -- These three locations are left null when operating in non-compiler
680 -- (e.g. ASIS mode), but when operating in compiler mode, they are
681 -- set to point to the three corresponding procedures in Osint-C. The
682 -- reason for this slightly strange interface is to prevent Repinfo
683 -- from dragging in Osint in ASIS mode, which would include a lot of
684 -- unwanted units in the ASIS build.
686 type Create_List_File_Proc is access procedure (S : String);
687 type Write_List_Info_Proc is access procedure (S : String);
688 type Close_List_File_Proc is access procedure;
689 -- Types used for procedure addresses below
691 Create_List_File_Access : Create_List_File_Proc := null;
692 Write_List_Info_Access : Write_List_Info_Proc := null;
693 Close_List_File_Access : Close_List_File_Proc := null;
694 -- GNAT
695 -- These three locations are left null when operating in non-compiler
696 -- (e.g. from the binder), but when operating in compiler mode, they are
697 -- set to point to the three corresponding procedures in Osint-C. The
698 -- reason for this slightly strange interface is to prevent Repinfo
699 -- from dragging in Osint-C in the binder, which would include unwanted
700 -- units in the binder.
703 -- GNAT, GNATBIND
705 -- Reset to first character (uppercase) of locking policy name if a
706 -- valid pragma Locking_Policy is encountered.
708 Locking_Policy_Sloc : Source_Ptr := No_Location;
709 -- GNAT, GNATBIND
710 -- Remember location of previous Locking_Policy pragma. This is used
711 -- for inconsistency error messages. A value of System_Location is
712 -- used if the policy is set in package System.
714 Look_In_Primary_Dir : Boolean := True;
715 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
716 -- Set to False if a -I- was present on the command line.
717 -- When True we are allowed to look in the primary directory to locate
718 -- other source or library files.
720 Make_Steps : Boolean := False;
721 -- GNATMAKE
722 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
723 -- set to True.
725 Main_Index : Int := 0;
726 -- GNATMAKE
727 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
728 -- the main program is the nnn unit in a multi-unit source file.
730 Mapping_File_Name : String_Ptr := null;
731 -- GNAT
732 -- File name of mapping between unit names, file names and path names.
733 -- (given by switch -gnatem)
735 Maximum_Errors : Int := 9999;
736 -- GNAT, GNATBIND
737 -- Maximum default number of errors before compilation is terminated.
738 -- Can be overridden using -gnatm (GNAT) or -m (GNATBIND) switch.
740 Maximum_File_Name_Length : Int;
741 -- GNAT, GNATBIND
742 -- Maximum number of characters allowed in a file name, not counting the
743 -- extension, as set by the appropriate switch. If no switch is given,
744 -- then this value is initialized by Osint to the appropriate value.
746 Maximum_Processes : Positive := 1;
747 -- GNATMAKE, GPRMAKE
748 -- Maximum number of processes that should be spawned to carry out
749 -- compilations.
751 Minimal_Recompilation : Boolean := False;
752 -- GNATMAKE
753 -- Set to True if minimal recompilation mode requested
755 Multiple_Unit_Index : Int;
756 -- GNAT
757 -- This is set non-zero if the current unit is being compiled in multiple
758 -- unit per file mode, meaning that the current unit is selected from the
759 -- sequence of units in the current source file, using the value stored
760 -- in this variable (e.g. 2 = select second unit in file). A value of
761 -- zero indicates that we are in normal (one unit per file) mode.
763 No_Main_Subprogram : Boolean := False;
764 -- GNATMAKE, GNATBIND
765 -- Set to True if compilation/binding of a program without main
766 -- subprogram requested.
768 No_Run_Time_Mode : Boolean := False;
769 -- GNAT, GNATBIND
770 -- This flag is set True if a No_Run_Time pragma is encountered. See
771 -- spec of Rtsfind for a full description of handling of this pragma.
773 No_Stdinc : Boolean := False;
774 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
775 -- Set to True if no default source search dirs added to search list
777 No_Stdlib : Boolean := False;
778 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
779 -- Set to True if no default library search dirs added to search list
781 No_Strict_Aliasing : Boolean := False;
782 -- GNAT
783 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
785 Normalize_Scalars : Boolean := False;
786 -- GNAT, GNATBIND
787 -- Set True if a pragma Normalize_Scalars applies to the current unit.
788 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
790 Object_Directory_Present : Boolean := False;
791 -- GNATMAKE
792 -- Set to True when an object directory is specified with option -D
794 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
795 Operating_Mode : Operating_Mode_Type := Generate_Code;
796 -- GNAT
797 -- Indicates the operating mode of the compiler. The default is generate
798 -- code, which runs the parser, semantics and backend. Switches can be
799 -- used to set syntax checking only mode, or syntax and semantics checking
800 -- only mode. Operating_Mode can also be modified as a result of detecting
801 -- errors during the compilation process. In particular if any serious
802 -- error is detected then this flag is reset from Generate_Code to
803 -- Check_Semantics after generating an error message.
805 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
806 -- GNAT
807 -- Indicates the original operating mode of the compiler as set by
808 -- compiler options. This is identical to Operating_Mode except that
809 -- this is not affected by errors.
811 Optimization_Level : Int;
812 pragma Import (C, Optimization_Level, "optimize");
813 -- This constant reflects the optimization level (0,1,2 for -O0,-O1,-O2)
815 Output_File_Name_Present : Boolean := False;
816 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
817 -- Set to True when the output C file name is given with option -o
818 -- for GNATBIND, when the object file name is given with option
819 -- -gnatO for GNAT or when the executable is given with option -o
820 -- for GNATMAKE or GPRMAKE.
822 Output_Linker_Option_List : Boolean := False;
823 -- GNATBIND
824 -- True if output of list of linker options is requested (-K switch set)
826 Output_Object_List : Boolean := False;
827 -- GNATBIND
828 -- True if output of list of objects is requested (-O switch set)
830 Persistent_BSS_Mode : Boolean := False;
831 -- GNAT
832 -- True if a Persistent_BSS configuration pragma is in effect, causing
833 -- potentially persistent data to be placed in the persistent_bss section.
835 Pessimistic_Elab_Order : Boolean := False;
836 -- GNATBIND
837 -- True if pessimistic elaboration order is to be chosen (-p switch set)
839 Polling_Required : Boolean := False;
840 -- GNAT
841 -- Set to True if polling for asynchronous abort is enabled by using
842 -- the -gnatP option for GNAT.
844 Preprocessing_Data_File : String_Ptr := null;
845 -- GNAT
846 -- Set by switch -gnatep=. The file name of the prepocessing data file.
848 Print_Generated_Code : Boolean := False;
849 -- GNAT
850 -- Set to True to enable output of generated code in source form. This
851 -- flag is set by the -gnatG switch.
853 Print_Standard : Boolean := False;
854 -- GNAT
855 -- Set to true to enable printing of package standard in source form.
856 -- This flag is set by the -gnatS switch
858 Propagate_Exceptions : Boolean := False;
859 -- GNAT
860 -- Indicates if subprogram descriptor exception tables should be
861 -- built for imported subprograms. Set True if a Propagate_Exceptions
862 -- pragma applies to the extended main unit.
864 type Usage is (Unknown, Not_In_Use, In_Use);
865 Project_File_In_Use : Usage := Unknown;
866 -- GNAT
867 -- Indicates if a project file is used or not.
868 -- Set to In_Use by the first SFNP pragma.
871 -- GNAT, GNATBIND
873 -- Reset to first character (uppercase) of locking policy name if a valid
874 -- Queuing_Policy pragma is encountered.
876 Queuing_Policy_Sloc : Source_Ptr := No_Location;
877 -- GNAT, GNATBIND
878 -- Remember location of previous Queuing_Policy pragma. This is used
879 -- for inconsistency error messages. A value of System_Location is
880 -- used if the policy is set in package System.
882 Quiet_Output : Boolean := False;
883 -- GNATMAKE, GNATCLEAN, GPRMAKE
884 -- Set to True if the tool should not have any output if there are no
885 -- errors or warnings.
887 Replace_In_Comments : Boolean := False;
888 -- GNATPREP
889 -- Set to True if -C switch used
891 RTS_Lib_Path_Name : String_Ptr := null;
892 RTS_Src_Path_Name : String_Ptr := null;
893 -- GNAT
894 -- Set to the "adalib" and "adainclude" directories of the run time
895 -- specified by --RTS=.
897 RTS_Switch : Boolean := False;
898 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
899 -- Set to True when the --RTS switch is set
901 Run_Path_Option : Boolean := True;
902 -- GNATMAKE, GNATLINK
903 -- Set to False when no run_path_option should be issued to the linker
905 Search_Directory_Present : Boolean := False;
906 -- GNAT
907 -- Set to True when argument is -I. Reset to False when next argument,
908 -- a search directory path is taken into account. Note that this is
909 -- quite different from other switches in this section in that it is
910 -- only set in a transitory manner as a result of scanning a -I switch
911 -- with no file name, and if set, is an indication that the next argument
912 -- is to be treated as a file name.
914 Sec_Stack_Used : Boolean := False;
915 -- GNAT, GBATBIND
916 -- Set True if generated code uses the System.Secondary_Stack package.
917 -- For the binder, set if any unit uses the secondary stack package.
919 Setup_Projects : Boolean := False;
920 -- GNAT DRIVER
921 -- Set to True for GNAT SETUP: the Project Manager creates non existing
922 -- object, library and exec directories.
924 Shared_Libgnat : Boolean;
925 -- GNATBIND
926 -- Set to True if a shared libgnat is requested by using the -shared
927 -- option for GNATBIND and to False when using the -static option. The
928 -- value of this flag is set by Gnatbind.Scan_Bind_Arg.
930 Stack_Checking_Enabled : Boolean;
931 -- GNAT
932 -- Set to indicate if -fstack-check switch is set for the compilation. True
933 -- means that the switch is set, so that stack checking is enabled. False
934 -- means that the switch is not set (no stack checking). This value is
935 -- obtained from the external imported value flag_stack_check in the gcc
936 -- backend (see Frontend) and may be referenced throughout the compilation
937 -- phases.
939 Style_Check : Boolean := False;
940 -- GNAT
941 -- Set True to perform style checks. Activates checks carried out
942 -- in package Style (see body of this package for details of checks)
943 -- This flag is set True by either the -gnatg or -gnaty switches.
945 System_Extend_Pragma_Arg : Node_Id := Empty;
946 -- GNAT
947 -- Set non-empty if and only if a correct Extend_System pragma was present
948 -- in which case it points to the argument of the pragma, and the name can
949 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
951 System_Extend_Unit : Node_Id := Empty;
952 -- GNAT
953 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
954 -- is never appropriate in GNAT_Mode (and causes troubles, including
955 -- bogus circularities, if we try to compile the run-time library with
956 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
957 -- is a copy of the value set in System_Extend_Pragma_Arg.
959 Subunits_Missing : Boolean := False;
960 -- GNAT
961 -- This flag is set true if missing subunits are detected with code
962 -- generation active. This causes code generation to be skipped.
964 Suppress_Checks : Boolean := False;
965 -- GNAT
966 -- Set to True if -gnatp (suppress all checks) switch present.
968 Suppress_Options : Suppress_Array;
969 -- GNAT
970 -- Flags set True to suppress corresponding check, i.e. add an implicit
971 -- pragma Suppress at the outer level of each unit compiled. Note that
972 -- these suppress actions can be overridden by the use of the Unsuppress
973 -- pragma. This variable is initialized by Osint.Initialize.
975 Suppress_Back_Annotation : Boolean := False;
976 -- GNAT
977 -- This flag is set True if back annotation of representation information
978 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
979 -- This avoids unnecessary time being spent on back annotation.
981 Table_Factor : Int := 1;
982 -- GNAT
983 -- Factor by which all initial table sizes set in Alloc are multiplied.
984 -- Used in Table to calculate initial table sizes (the initial table size
985 -- is the value in Alloc, used as the Table_Initial parameter value,
986 -- multiplied by the factor given here. The default value is used if no
987 -- -gnatT switch appears.
990 -- GNAT, GNATBIND
992 -- Reset to first character (uppercase) of task dispatching policy name
993 -- if a valid Task_Dispatching_Policy pragma is encountered.
995 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
996 -- GNAT, GNATBIND
997 -- Remember location of previous Task_Dispatching_Policy pragma. This is
998 -- used for inconsistency error messages. A value of System_Location is
999 -- used if the policy is set in package System.
1001 Tasking_Used : Boolean := False;
1002 -- Set True if any tasking construct is encountered. Used to activate the
1003 -- output of the Q, L and T lines in ALI files.
1005 Time_Slice_Set : Boolean := False;
1006 -- GNATBIND
1007 -- Set True if a pragma Time_Slice is processed in the main unit, or
1008 -- if the -gnatTnn switch is present to set a time slice value.
1010 Time_Slice_Value : Nat;
1011 -- GNATBIND
1012 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1013 -- Time_Slice pragma has been processed. Set to the time slice value in
1014 -- microseconds. Negative values are stored as zero, and the value is not
1015 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1016 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1018 Tolerate_Consistency_Errors : Boolean := False;
1019 -- GNATBIND
1020 -- Tolerate time stamp and other consistency errors. If this flag is set to
1021 -- True (-t), then inconsistencies result in warnings rather than errors.
1023 Tree_Output : Boolean := False;
1024 -- GNAT
1025 -- Set to True (-gnatt) to generate output tree file
1027 Try_Semantics : Boolean := False;
1028 -- GNAT
1029 -- Flag set to force attempt at semantic analysis, even if parser errors
1030 -- occur. This will probably cause blowups at this stage in the game. On
1031 -- the other hand, most such blowups will be caught cleanly and simply
1032 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
1034 Undefined_Symbols_Are_False : Boolean := False;
1035 -- GNAT, GNATPREP
1036 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1037 -- file for the compiler. Indicates that while preprocessing sources,
1038 -- symbols that are not defined have the value FALSE.
1040 Unique_Error_Tag : Boolean := Tag_Errors;
1041 -- GNAT
1042 -- Indicates if error messages are to be prefixed by the string error:
1043 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1045 Universal_Addressing_On_AAMP : Boolean := False;
1046 -- GNAAMP
1047 -- Indicates if library-level objects should be accessed and updated using
1048 -- universal addressing instructions on the AAMP architecture. This flag is
1049 -- set to True when pragma Universal_Data is given as a configuration
1050 -- pragma.
1052 Unreserve_All_Interrupts : Boolean := False;
1053 -- GNAT, GNATBIND
1054 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1055 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1056 -- corresponding attribute set in GNATBIND.
1058 Upper_Half_Encoding : Boolean := False;
1059 -- GNAT
1060 -- Normally set False, indicating that upper half ASCII characters are
1061 -- used in the normal way to represent themselves. If the wide character
1062 -- encoding method uses the upper bit for this encoding, then this flag is
1063 -- set True, and upper half characters in the source indicate the start of
1064 -- a wide character sequence.
1066 Usage_Requested : Boolean := False;
1067 -- GNAT, GNATBIND, GNATMAKE
1068 -- Set to True if -h (-gnath for the compiler) switch encountered
1069 -- requesting usage information
1071 Use_Pragma_Linker_Constructor : Boolean := False;
1072 -- GNATBIND
1073 -- True if pragma Linker_Constructor applies to adainit
1075 Use_VADS_Size : Boolean := False;
1076 -- GNAT
1077 -- Set to True if a valid pragma Use_VADS_Size is processed
1079 Validity_Checks_On : Boolean := True;
1080 -- GNAT
1081 -- This flag determines if validity checking is on or off. The initial
1082 -- state is on, and the required default validity checks are active. The
1083 -- actual set of checks that is performed if Validity_Checks_On is set is
1084 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1085 -- is controlled by pragma Validity_Checks (On | Off), and also some
1086 -- generated compiler code (typically code that has to do with validity
1087 -- check generation) is compiled with this flag set to False. This flag is
1088 -- set to False by the -gnatp switch.
1090 Verbose_Mode : Boolean := False;
1091 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1092 -- GPRMAKE
1093 -- Set to True to get verbose mode (full error message text and location
1094 -- information sent to standard output, also header, copyright and summary)
1096 type Verbosity_Level_Type is (None, Low, Medium, High);
1097 Verbosity_Level : Verbosity_Level_Type := High;
1098 -- GNATMAKE, GPRMAKE
1099 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1100 -- the level of verbosity of informational messages:
1101 --
1102 -- In Low Verbosity, the reasons why a source is recompiled, the name
1103 -- of the executable and the reason it must be rebuilt is output.
1104 --
1105 -- In Medium Verbosity, additional lines are output for each ALI file
1106 -- that is checked.
1107 --
1108 -- In High Verbosity, additional lines are output when the ALI file
1109 -- is part of an Ada library, is read-only or is part of the runtime.
1111 Warn_On_Ada_2005_Compatibility : Boolean := True;
1112 -- GNAT
1113 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1114 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1115 -- mode. Set False by -gnatwY.
1117 Warn_On_Assumed_Low_Bound : Boolean := True;
1118 -- GNAT
1119 -- Set to True to activate warnings for string parameters that are indexed
1120 -- with literals or S'Length, presumably assuming a lower bound of one. Set
1121 -- False by -gnatwW.
1123 Warn_On_Bad_Fixed_Value : Boolean := False;
1124 -- GNAT
1125 -- Set to True to generate warnings for static fixed-point expression
1126 -- values that are not an exact multiple of the small value of the type.
1128 Warn_On_Constant : Boolean := False;
1129 -- GNAT
1130 -- Set to True to generate warnings for variables that could be declared
1131 -- as constants. Modified by use of -gnatwk/K.
1133 Warn_On_Deleted_Code : Boolean := False;
1134 -- GNAT
1135 -- Set to True to generate warnings for code deleted by the front end
1136 -- for conditional statements whose outcome is known at compile time.
1137 -- Modified by use of -gnatwt/T.
1139 Warn_On_Dereference : Boolean := False;
1140 -- GNAT
1141 -- Set to True to generate warnings for implicit dereferences for array
1142 -- indexing and record component access. Modified by use of -gnatwd/D.
1144 Warn_On_Export_Import : Boolean := True;
1145 -- GNAT
1146 -- Set to True to generate warnings for suspicious use of export or
1147 -- import pragmas. Modified by use of -gnatwx/X.
1149 Warn_On_Hiding : Boolean := False;
1150 -- GNAT
1151 -- Set to True to generate warnings if a declared entity hides another
1152 -- entity. The default is that this warning is suppressed.
1154 Warn_On_Modified_Unread : Boolean := False;
1155 -- GNAT
1156 -- Set to True to generate warnings if a variable is assigned but is never
1157 -- read. The default is that this warning is suppressed. Also controls
1158 -- warnings about assignments whose value is never read.
1160 Warn_On_No_Value_Assigned : Boolean := True;
1161 -- GNAT
1162 -- Set to True to generate warnings if no value is ever assigned to a
1163 -- variable that is at least partially uninitialized. Set to false to
1164 -- suppress such warnings. The default is that such warnings are enabled.
1166 Warn_On_Obsolescent_Feature : Boolean := False;
1167 -- GNAT
1168 -- Set to True to generate warnings on use of any feature in Annex or if a
1169 -- subprogram is called for which a pragma Obsolescent applies.
1171 Warn_On_Questionable_Missing_Parens : Boolean := False;
1172 -- GNAT
1173 -- Set to True to generate warnings for cases where parenthese are missing
1174 -- and the usage is questionable, because the intent is unclear.
1176 Warn_On_Redundant_Constructs : Boolean := False;
1177 -- GNAT
1178 -- Set to True to generate warnings for redundant constructs (e.g. useless
1179 -- assignments/conversions). The default is that this warning is disabled.
1181 Warn_On_Unchecked_Conversion : Boolean := True;
1182 -- GNAT
1183 -- Set to True to generate warnings for unchecked conversions that may have
1184 -- non-portable semantics (e.g. because sizes of types differ). The default
1185 -- is that this warning is enabled.
1187 Warn_On_Unrecognized_Pragma : Boolean := True;
1188 -- GNAT
1189 -- Set to True to generate warnings for unrecognized pragmas. The default
1190 -- is that this warning is enabled.
1192 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1193 Warning_Mode : Warning_Mode_Type := Normal;
1194 -- GNAT, GNATBIND
1195 -- Controls treatment of warning messages. If set to Suppress, warning
1196 -- messages are not generated at all. In Normal mode, they are generated
1197 -- but do not count as errors. In Treat_As_Error mode, warning messages
1198 -- are generated and are treated as errors.
1200 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1201 -- GNAT
1202 -- Method used for encoding wide characters in the source program. See
1203 -- description of type in unit System.WCh_Con for a list of the methods
1204 -- that are currently supported. Note that brackets notation is always
1205 -- recognized in source programs regardless of the setting of this
1206 -- variable. The default setting causes only the brackets notation to be
1207 -- recognized. If this is the main unit, this setting also controls the
1208 -- output of the W=? parameter in the ALI file, which is used to provide
1209 -- the default for Wide_Text_IO files.
1211 Xref_Active : Boolean := True;
1212 -- GNAT
1213 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1215 ----------------------------
1216 -- Configuration Settings --
1217 ----------------------------
1219 -- These are settings that are used to establish the mode at the start of
1220 -- each unit. The values defined below can be affected either by command
1221 -- line switches, or by the use of appropriate configuration pragmas in the
1222 -- gnat.adc file.
1224 Ada_Version_Config : Ada_Version_Type;
1225 -- GNAT
1226 -- This is the value of the configuration switch for the Ada 83 mode, as
1227 -- set by the command line switches -gnat83/95/05, and possibly modified by
1228 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1229 -- to set the initial value for Ada_Version mode at the start of analysis
1230 -- of a unit. Note however, that the setting of this flag is ignored for
1231 -- internal and predefined units (which are always compiled in the most up
1232 -- to date version of Ada).
1234 Ada_Version_Explicit_Config : Ada_Version_Type;
1235 -- GNAT
1236 -- This is set in the same manner as Ada_Version_Config. The difference is
1237 -- that the setting of this flag is not ignored for internal and predefined
1238 -- units, which for some purposes do indeed access this value, regardless
1239 -- of the fact that they are compiled the the most up to date ada version).
1241 Assertions_Enabled_Config : Boolean;
1242 -- GNAT
1243 -- This is the value of the configuration switch for assertions enabled
1244 -- mode, as possibly set by the command line switch -gnata, and possibly
1245 -- modified by the use of the configuration pragma Assertion_Policy.
1247 Debug_Pragmas_Enabled_Config : Boolean;
1248 -- GNAT
1249 -- This is the value of the configuration switch for debug pragmas enabled
1250 -- mode, as possibly set by the command line switch -gnata and possibly
1251 -- modified by the use of the configuration pragma Debug_Policy.
1253 Dynamic_Elaboration_Checks_Config : Boolean := False;
1254 -- GNAT
1255 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1256 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1258 Exception_Locations_Suppressed_Config : Boolean := False;
1259 -- GNAT
1260 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1262 Extensions_Allowed_Config : Boolean;
1263 -- GNAT
1264 -- This is the flag that indicates whether extensions are allowed. It can
1265 -- be set True either by use of the -gnatX switch, or by use of the
1266 -- configuration pragma Extensions_Allowed (On). It is always set to True
1267 -- for internal GNAT units, since extensions are always permitted in such
1268 -- units.
1270 External_Name_Exp_Casing_Config : External_Casing_Type;
1271 -- GNAT
1272 -- This is the value of the configuration switch that controls casing of
1273 -- external symbols for which an explicit external name is given. It can be
1274 -- set to Uppercase by the command line switch -gnatF, and further modified
1275 -- by the use of the configuration pragma External_Name_Casing in the
1276 -- gnat.adc file. This flag is used to set the initial value for
1277 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1278 -- however that the setting of this flag is ignored for internal and
1279 -- predefined units (which are always compiled with As_Is mode).
1281 External_Name_Imp_Casing_Config : External_Casing_Type;
1282 -- GNAT
1283 -- This is the value of the configuration switch that controls casing of
1284 -- external symbols where the external name is implicitly given. It can be
1285 -- set to Uppercase by the command line switch -gnatF, and further modified
1286 -- by the use of the configuration pragma External_Name_Casing in the
1287 -- gnat.adc file. This flag is used to set the initial value for
1288 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1289 -- however that the setting of this flag is ignored for internal and
1290 -- predefined units (which are always compiled with Lowercase mode).
1292 Persistent_BSS_Mode_Config : Boolean;
1293 -- GNAT
1294 -- This is the value of the configuration switch that controls whether
1295 -- potentially persistent data is to be placed in the persistent_bss
1296 -- section. It can be set True by use of the pragma Persistent_BSS.
1297 -- This flag is used to set the initial value of Persistent_BSS_Mode
1298 -- at the start of each compilation unit, except that it is always
1299 -- set False for predefined units.
1301 Polling_Required_Config : Boolean;
1302 -- GNAT
1303 -- This is the value of the configuration switch that controls polling
1304 -- mode. It can be set True by the command line switch -gnatP, and then
1305 -- further modified by the use of pragma Polling in the gnat.adc file. This
1306 -- flag is used to set the initial value for Polling_Required at the start
1307 -- of analyzing each unit.
1309 Use_VADS_Size_Config : Boolean;
1310 -- GNAT
1311 -- This is the value of the configuration switch that controls the use of
1312 -- VADS_Size instead of Size whereever the attribute Size is used. It can
1313 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1314 -- This flag is used to set the initial value for Use_VADS_Size at the
1315 -- start of analyzing each unit. Note however that the setting of this flag
1316 -- is ignored for internal and predefined units (which are always compiled
1317 -- with the standard Size semantics).
1319 type Config_Switches_Type is private;
1320 -- Type used to save values of the switches set from Config values
1322 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1323 -- This procedure saves the current values of the switches which are
1324 -- initialized from the above Config values, and then resets these switches
1325 -- according to the Config value settings.
1327 procedure Set_Opt_Config_Switches
1328 (Internal_Unit : Boolean;
1329 Main_Unit : Boolean);
1330 -- This procedure sets the switches to the appropriate initial values. The
1331 -- parameter Internal_Unit is True for an internal or predefined unit, and
1332 -- affects the way the switches are set (see above). Main_Unit is true if
1333 -- switches are being set for the main unit (this affects setting of the
1334 -- assert/debug pragm switches, which are normally set false by default for
1335 -- an internal unit, except when the internal unit is the main unit, in
1336 -- which case we use the command line settings).
1338 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1339 -- This procedure restores a set of switch values previously saved by a
1340 -- call to Save_Opt_Switches.
1342 procedure Register_Opt_Config_Switches;
1343 -- This procedure is called after processing the gnat.adc file to record
1344 -- the values of the Config switches, as possibly modified by the use of
1345 -- command line switches and configuration pragmas.
1347 ------------------------
1348 -- Other Global Flags --
1349 ------------------------
1351 Expander_Active : Boolean := False;
1352 -- A flag that indicates if expansion is active (True) or deactivated
1353 -- (False). When expansion is deactivated all calls to expander routines
1354 -- have no effect. Note that the initial setting of False is merely to
1355 -- prevent saving of an undefined value for an initial call to the
1356 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1357 -- this flag, see package Expander. Indeed this flag might more logically
1358 -- be in the spec of Expander, but it is referenced by Errout, and it
1359 -- really seems wrong for Errout to depend on Expander.
1361 -----------------------
1362 -- Tree I/O Routines --
1363 -----------------------
1365 procedure Tree_Read;
1366 -- Reads switch settings from current tree file using Tree_Read
1368 procedure Tree_Write;
1369 -- Writes out switch settings to current tree file using Tree_Write
1371 --------------------------
1372 -- ASIS Version Control --
1373 --------------------------
1375 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1376 -- are supposed to be used in the GNAT/ASIS version check performed in
1377 -- the ASIS code (this package is also a part of the ASIS implementation).
1378 -- They are set by Tree_Read procedure, so they represent the version
1379 -- number (and the version string) of the compiler which has created the
1380 -- tree, and they are supposed to be compared with the corresponding values
1381 -- from the Gnatvsn package which is a part of ASIS implementation.
1383 Tree_Version_String : String_Access;
1384 -- Used to store the compiler version string read from a tree file to check
1385 -- if it is from the same date as stored in the version string in Gnatvsn.
1386 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1387 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1388 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1389 -- of the corresponding source sets, using version strings that may be
1390 -- of different lengths.
1392 Tree_ASIS_Version_Number : Int;
1393 -- Used to store the ASIS version number read from a tree file to check if
1394 -- it is the same as stored in the ASIS version number in Gnatvsn.
1396 private
1398 -- The following type is used to save and restore settings of switches in
1399 -- Opt that represent the configuration (i.e. result of config pragmas).
1401 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1402 -- flag that once set does not get reset, since the whole idea of this flag
1403 -- is to record the setting for the main unit.
1405 type Config_Switches_Type is record
1406 Ada_Version : Ada_Version_Type;
1407 Ada_Version_Explicit : Ada_Version_Type;
1408 Assertions_Enabled : Boolean;
1409 Debug_Pragmas_Enabled : Boolean;
1410 Dynamic_Elaboration_Checks : Boolean;
1411 Exception_Locations_Suppressed : Boolean;
1412 Extensions_Allowed : Boolean;
1413 External_Name_Exp_Casing : External_Casing_Type;
1414 External_Name_Imp_Casing : External_Casing_Type;
1415 Persistent_BSS_Mode : Boolean;
1416 Polling_Required : Boolean;
1417 Use_VADS_Size : Boolean;
1418 end record;
1420 end Opt;