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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.
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 Comment_Deleted_Lines : Boolean := False;
243 -- GNATPREP
244 -- True if source lines removed by the preprocessor should be commented
245 -- in the output file.
247 Compile_Only : Boolean := False;
248 -- GNATMAKE, GNATCLEAN, GPRMAKE
249 -- GNATMAKE, GPRMAKE: set to True to skip bind and link steps (except when
250 -- Bind_Only is True).
251 -- GNATCLEAN: set to True to only the files produced by the compiler are to
252 -- be deleted, but not the library files or executable files.
254 Config_File : Boolean := True;
255 -- GNAT
256 -- Set to False to inhibit reading and processing of gnat.adc file
258 Config_File_Names : String_List_Access := null;
259 -- GNAT
260 -- Names of configuration pragmas files (given by switches -gnatec)
262 Configurable_Run_Time_Mode : Boolean := False;
263 -- GNAT, GNATBIND
264 -- Set True if the compiler is operating in configurable run-time mode.
265 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
266 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
267 -- for details on the handling of the latter pragma.
269 Constant_Condition_Warnings : Boolean := False;
270 -- GNAT
271 -- Set to True to activate warnings on constant conditions
273 Create_Mapping_File : Boolean := False;
274 -- GNATMAKE, GPRMAKE
275 -- Set to True (-C switch) to indicate that the compiler will be invoked
276 -- with a mapping file (-gnatem compiler switch).
278 Debug_Pragmas_Enabled : Boolean := False;
279 -- GNAT
280 -- Enable debug statements from pragma Debug
282 subtype Debug_Level_Value is Nat range 0 .. 3;
283 Debugger_Level : Debug_Level_Value := 0;
284 -- GNATBIND
285 -- The value given to the -g parameter. The default value for -g with
286 -- no value is 2. This is usually ignored by GNATBIND, except in the
287 -- VMS version where it is passed as an argument to __gnat_initialize
288 -- to trigger the activation of the remote debugging interface.
289 -- Is this still true ???
291 Debug_Generated_Code : Boolean := False;
292 -- GNAT
293 -- Set True (-gnatD switch) to debug generated expanded code instead
294 -- of the original source code. Causes debugging information to be
295 -- written with respect to the generated code file that is written.
297 Default_Exit_Status : Int := 0;
298 -- GNATBIND
299 -- Set the default exit status value. Set by the -Xnnn switch for the
300 -- binder.
302 Default_Stack_Size : Int := -1;
303 -- GNATBIND
304 -- Set to default primary stack size in units of bytes. Set by
305 -- the -dnnn switch for the binder. A value of -1 indicates that no
306 -- default was set by the binder.
308 Default_Sec_Stack_Size : Int := -1;
309 -- GNATBIND
310 -- Set to default secondary stack size in units of bytes. Set by
311 -- the -Dnnn switch for the binder. A value of -1 indicates that no
312 -- default was set by the binder, and that the default should be the
313 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
315 Detect_Blocking : Boolean := False;
316 -- GNAT
317 -- Set True to force the run time to raise Program_Error if calls to
318 -- potentially blocking operations are detected from protected actions.
320 Display_Compilation_Progress : Boolean := False;
321 -- GNATMAKE, GPRMAKE
322 -- Set True (-d switch) to display information on progress while compiling
323 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
325 type Distribution_Stub_Mode_Type is
326 -- GNAT
327 (No_Stubs,
328 -- Normal mode, no generation/compilation of distribution stubs
330 Generate_Receiver_Stub_Body,
331 -- The unit being compiled is the RCI body, and the compiler will
332 -- generate the body for the receiver stubs and compile it.
334 Generate_Caller_Stub_Body);
335 -- The unit being compiled is the RCI spec, and the compiler will
336 -- generate the body for the caller stubs and compile it.
338 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
339 -- GNAT
340 -- This enumeration variable indicates the five states of distribution
341 -- annex stub generation/compilation.
343 Do_Not_Execute : Boolean := False;
344 -- GNATMAKE
345 -- Set to True if no actual compilations should be undertaken.
347 Dynamic_Elaboration_Checks : Boolean := False;
348 -- GNAT
349 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
350 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
352 Dynamic_Stack_Measurement : Boolean := False;
353 -- GNATBIND
354 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
356 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
357 -- GNATBIND
358 -- Number of measurements we want to store during dynamic stack analysis.
359 -- When the buffer is full, non-storable results will be output on the fly.
360 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
361 -- by processing of -u flag for gnatbind.
363 Elab_Dependency_Output : Boolean := False;
364 -- GNATBIND
365 -- Set to True to output complete list of elaboration constraints
367 Elab_Order_Output : Boolean := False;
368 -- GNATBIND
369 -- Set to True to output chosen elaboration order
371 Elab_Warnings : Boolean := False;
372 -- GNAT
373 -- Set to True to generate full elaboration warnings (-gnatwl)
375 Enable_Overflow_Checks : Boolean := False;
376 -- GNAT
377 -- Set to True if -gnato (enable overflow checks) switch is set,
378 -- but not -gnatp.
380 Exception_Locations_Suppressed : Boolean := False;
381 -- GNAT
382 -- This flag is set True if a Suppress_Exception_Locations configuration
383 -- pragma is currently active.
385 type Exception_Mechanism_Type is
386 -- Determines the handling of exceptions. See Exp_Ch11 for details
387 --
388 (Front_End_Setjmp_Longjmp_Exceptions,
389 -- Exceptions use setjmp/longjmp generated explicitly by the
390 -- front end (this includes gigi or other equivalent parts of
391 -- the code generator). AT END handlers are converted into
392 -- exception handlers by the front end in this mode.
394 Back_End_Exceptions);
395 -- Exceptions are handled by the back end. The front end simply
396 -- generates the handlers as they appear in the source, and AT
397 -- END handlers are left untouched (they are not converted into
398 -- exception handlers when operating in this mode.
399 pragma Convention (C, Exception_Mechanism_Type);
401 Exception_Mechanism : Exception_Mechanism_Type :=
402 Front_End_Setjmp_Longjmp_Exceptions;
403 -- GNAT
404 -- Set to the appropriate value depending on the default as given in
405 -- system.ads (ZCX_By_Default, GCC_ZCX_Support).
406 -- The C convention is there to make this variable accessible to gigi.
408 Exception_Tracebacks : Boolean := False;
409 -- GNATBIND
410 -- Set to True to store tracebacks in exception occurrences (-E)
412 Extensions_Allowed : Boolean := False;
413 -- GNAT
414 -- Set to True by switch -gnatX if GNAT specific language extensions
415 -- are allowed. For example, "limited with" is a GNAT extension.
417 type External_Casing_Type is (
418 As_Is, -- External names cased as they appear in the Ada source
419 Uppercase, -- External names forced to all uppercase letters
420 Lowercase); -- External names forced to all lowercase letters
422 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
423 -- GNAT
424 -- The setting of this flag determines the casing of external names
425 -- when the name is implicitly derived from an entity name (i.e. either
426 -- no explicit External_Name or Link_Name argument is used, or, in the
427 -- case of extended DEC pragmas, the external name is given using an
428 -- identifier. The As_Is setting is not permitted here (since this would
429 -- create Ada source programs that were case sensitive).
431 External_Name_Exp_Casing : External_Casing_Type := As_Is;
432 -- GNAT
433 -- The setting of this flag determines the casing of an external name
434 -- specified explicitly with a string literal. As_Is means the string
435 -- literal is used as given with no modification to the casing. If
436 -- Lowercase or Uppercase is set, then the string is forced to all
437 -- lowercase or all uppercase letters as appropriate. Note that this
438 -- setting has no effect if the external name is given using an identifier
439 -- in the case of extended DEC import/export pragmas (in this case the
440 -- casing is controlled by External_Name_Imp_Casing), and also has no
441 -- effect if an explicit Link_Name is supplied (a link name is always
442 -- used exactly as given).
444 External_Unit_Compilation_Allowed : Boolean := False;
445 -- GNATMAKE
446 -- When True (set by gnatmake switch -x), allow compilation of sources
447 -- that are not part of any project file.
450 -- GNAT
451 -- A non-blank value indicates that a Float_Format pragma has been
454 -- versions of GNAT.
457 -- GNAT
458 -- A non-blank value indicates that a Long_Float pragma has been
459 -- processed (this pragma is recognized only in OpenVMS versions
460 -- of GNAT), in which case this variable is set to D or G for
461 -- D_Float or G_Float.
463 Force_ALI_Tree_File : Boolean := False;
464 -- GNAT
465 -- Force generation of ALI file even if errors are encountered.
466 -- Also forces generation of tree file if -gnatt is also set.
468 Force_Checking_Of_Elaboration_Flags : Boolean := False;
469 -- GNATBIND
470 -- True if binding with forced checking of the elaboration flags
471 -- (-F switch set).
473 Force_Compilations : Boolean := False;
474 -- GNATMAKE, GPRMAKE
475 -- Set to force recompilations even when the objects are up-to-date.
477 Full_Path_Name_For_Brief_Errors : Boolean := False;
478 -- GNAT, GNATMAKE, GNATCLEAN, GPRMAKE
479 -- When True, in Brief_Output mode, each error message line
480 -- will start with the full path name of the source.
481 -- When False, only the file name without directory information
482 -- is used.
484 Full_List : Boolean := False;
485 -- GNAT
486 -- Set True to generate full source listing with embedded errors
488 function get_gcc_version return Int;
489 pragma Import (C, get_gcc_version, "get_gcc_version");
491 GCC_Version : constant Nat := get_gcc_version;
492 -- GNATMAKE
493 -- Indicates which version of gcc is in use (2 = 2.8.1, 3 = 3.x)
495 Global_Discard_Names : Boolean := False;
496 -- GNAT, GNATBIND
497 -- Set true if a pragma Discard_Names applies to the current unit
499 GNAT_Mode : Boolean := False;
500 -- GNAT
501 -- True if compiling in GNAT system mode (-gnatg switch)
503 HLO_Active : Boolean := False;
504 -- GNAT
505 -- True if High Level Optimizer is activated (-gnatH switch)
507 Implementation_Unit_Warnings : Boolean := True;
508 -- GNAT
509 -- Set True to active warnings for use of implementation internal units.
510 -- Can be controlled by use of -gnatwi/-gnatwI.
512 Identifier_Character_Set : Character;
513 -- GNAT
514 -- This variable indicates the character set to be used for identifiers.
515 -- The possible settings are:
527 --
528 -- The setting affects the set of letters allowed in identifiers and the
529 -- upper/lower case equivalences. It does not affect the interpretation of
530 -- character and string literals, which are always stored using the actual
531 -- coding in the source program. This variable is initialized to the
532 -- default value appropriate to the system (in Osint.Initialize), and then
533 -- reset if a command line switch is used to change the setting.
535 Ineffective_Inline_Warnings : Boolean := False;
536 -- GNAT
537 -- Set True to activate warnings if front-end inlining (-gnatN) is not
538 -- able to actually inline a particular call (or all calls). Can be
539 -- controlled by use of -gnatwp/-gnatwP.
541 Init_Or_Norm_Scalars : Boolean := False;
542 -- GNAT, GANTBIND
543 -- Set True if a pragma Initialize_Scalars applies to the current unit.
544 -- Also set True if a pragma Normalize_Scalars applies.
546 Initialize_Scalars : Boolean := False;
547 -- GNAT
548 -- Set True if a pragma Initialize_Scalars applies to the current unit.
549 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
553 -- GNATBIND
554 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
555 -- is IN (invalid values), used if no -S switch is used.
557 Inline_Active : Boolean := False;
558 -- GNAT
559 -- Set True to activate pragma Inline processing across modules. Default
560 -- for now is not to inline across module boundaries.
562 Interface_Library_Unit : Boolean := False;
563 -- GNATBIND
564 -- Set to True to indicate that at least one ALI file is an interface ALI:
565 -- then elaboration flag checks are to be generated in the binder
566 -- generated file.
568 Follow_Links : Boolean := False;
569 -- GNATMAKE
570 -- Set to True (-eL) to process the project files in trusted mode
572 Front_End_Inlining : Boolean := False;
573 -- GNAT
574 -- Set True to activate inlining by front-end expansion
576 Inline_Processing_Required : Boolean := False;
577 -- GNAT
578 -- Set True if inline processing is required. Inline processing is
579 -- required if an active Inline pragma is processed. The flag is set
580 -- for a pragma Inline or Inline_Always that is actually active.
582 In_Place_Mode : Boolean := False;
583 -- GNATMAKE
584 -- Set True to store ALI and object files in place ie in the object
585 -- directory if these files already exist or in the source directory
586 -- if not.
588 Keep_Going : Boolean := False;
589 -- GNATMAKE, GPRMAKE
590 -- When True signals to ignore compilation errors and keep
591 -- processing sources until there is no more work.
593 Keep_Temporary_Files : Boolean := False;
594 -- GNATCMD
595 -- When True the temporary files created by the GNAT driver are not
596 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
598 Link_Only : Boolean := False;
599 -- GNATMAKE, GPRMAKE
600 -- Set to True to skip compile and bind steps
601 -- (except when Bind_Only is set to True).
603 List_Restrictions : Boolean := False;
604 -- GNATBIND
605 -- Set to True to list restrictions pragmas that could apply to partition
607 List_Units : Boolean := False;
608 -- GNAT
609 -- List units in the active library for a compilation (-gnatu switch)
611 List_Dependencies : Boolean := False;
612 -- GNATMAKE
613 -- When True gnatmake verifies that the objects are up to date and
614 -- outputs the list of object dependencies (-M switch).
615 -- Output depends if -a switch is used or not.
616 -- This list can be used directly in a Makefile.
618 List_Representation_Info : Int range 0 .. 3 := 0;
619 -- GNAT
620 -- Set non-zero by -gnatR switch to list representation information.
621 -- The settings are as follows:
622 --
623 -- 0 = no listing of representation information (default as above)
624 -- 1 = list rep info for user defined record and array types
625 -- 2 = list rep info for all user defined types and objects
626 -- 3 = like 2, but variable fields are decoded symbolically
628 List_Representation_Info_To_File : Boolean := False;
629 -- GNAT
630 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3
631 -- to be written to file.rep (where file is the name of the source
632 -- file) instead of stdout. For example, if file x.adb is compiled
633 -- using -gnatR2s then representation info is written to x.adb.ref.
635 List_Representation_Info_Mechanisms : Boolean := False;
636 -- GNAT
637 -- Set true by -gnatRm switch. Causes information on mechanisms to
638 -- be included in the representation output information.
640 List_Preprocessing_Symbols : Boolean := False;
641 -- GNAT, GNATPREP
642 -- Set to True if symbols for preprocessing a source are to be listed
643 -- before preprocessing occurs. Set to True by switch -s of gnatprep
644 -- or -s in preprocessing data file for the compiler.
646 type Creat_Repinfo_File_Proc is access procedure (Src : File_Name_Type);
647 type Write_Repinfo_Line_Proc is access procedure (Info : String);
648 type Close_Repinfo_File_Proc is access procedure;
649 -- Types used for procedure addresses below
651 Creat_Repinfo_File_Access : Creat_Repinfo_File_Proc := null;
652 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
653 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
654 -- GNAT
655 -- These three locations are left null when operating in non-compiler
656 -- (e.g. ASIS mode), but when operating in compiler mode, they are
657 -- set to point to the three corresponding procedures in Osint. The
658 -- reason for this slightly strange interface is to prevent Repinfo
659 -- from dragging in Osint in ASIS mode, which would include a lot of
660 -- unwanted units in the ASIS build.
663 -- GNAT, GNATBIND
665 -- Reset to first character (uppercase) of locking policy name if a
666 -- valid pragma Locking_Policy is encountered.
668 Locking_Policy_Sloc : Source_Ptr := No_Location;
669 -- GNAT, GNATBIND
670 -- Remember location of previous Locking_Policy pragma. This is used
671 -- for inconsistency error messages. A value of System_Location is
672 -- used if the policy is set in package System.
674 Look_In_Primary_Dir : Boolean := True;
675 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
676 -- Set to False if a -I- was present on the command line.
677 -- When True we are allowed to look in the primary directory to locate
678 -- other source or library files.
680 Make_Steps : Boolean := False;
681 -- GNATMAKE
682 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
683 -- set to True.
685 Main_Index : Int := 0;
686 -- GNATMAKE
687 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
688 -- the main program is the nnn unit in a multi-unit source file.
690 Mapping_File_Name : String_Ptr := null;
691 -- GNAT
692 -- File name of mapping between unit names, file names and path names.
693 -- (given by switch -gnatem)
695 Maximum_Errors : Int := 9999;
696 -- GNAT, GNATBIND
697 -- Maximum default number of errors before compilation is terminated.
698 -- Can be overridden using -gnatm (GNAT) or -m (GNATBIND) switch.
700 Maximum_File_Name_Length : Int;
701 -- GNAT, GNATBIND
702 -- Maximum number of characters allowed in a file name, not counting the
703 -- extension, as set by the appropriate switch. If no switch is given,
704 -- then this value is initialized by Osint to the appropriate value.
706 Maximum_Processes : Positive := 1;
707 -- GNATMAKE, GPRMAKE
708 -- Maximum number of processes that should be spawned to carry out
709 -- compilations.
711 Minimal_Recompilation : Boolean := False;
712 -- GNATMAKE
713 -- Set to True if minimal recompilation mode requested
715 Multiple_Unit_Index : Int;
716 -- GNAT
717 -- This is set non-zero if the current unit is being compiled in multiple
718 -- unit per file mode, meaning that the current unit is selected from the
719 -- sequence of units in the current source file, using the value stored
720 -- in this variable (e.g. 2 = select second unit in file). A value of
721 -- zero indicates that we are in normal (one unit per file) mode.
723 No_Main_Subprogram : Boolean := False;
724 -- GNATMAKE, GNATBIND
725 -- Set to True if compilation/binding of a program without main
726 -- subprogram requested.
728 No_Run_Time_Mode : Boolean := False;
729 -- GNAT, GNATBIND
730 -- This flag is set True if a No_Run_Time pragma is encountered. See
731 -- spec of Rtsfind for a full description of handling of this pragma.
733 No_Stdinc : Boolean := False;
734 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
735 -- Set to True if no default source search dirs added to search list
737 No_Stdlib : Boolean := False;
738 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
739 -- Set to True if no default library search dirs added to search list
741 No_Strict_Aliasing : Boolean := False;
742 -- GNAT
743 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
745 Normalize_Scalars : Boolean := False;
746 -- GNAT, GNATBIND
747 -- Set True if a pragma Normalize_Scalars applies to the current unit.
748 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
750 Object_Directory_Present : Boolean := False;
751 -- GNATMAKE
752 -- Set to True when an object directory is specified with option -D
754 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
755 Operating_Mode : Operating_Mode_Type := Generate_Code;
756 -- GNAT
757 -- Indicates the operating mode of the compiler. The default is generate
758 -- code, which runs the parser, semantics and backend. Switches can be
759 -- used to set syntax checking only mode, or syntax and semantics checking
760 -- only mode. Operating_Mode can also be modified as a result of detecting
761 -- errors during the compilation process. In particular if any serious
762 -- error is detected then this flag is reset from Generate_Code to
763 -- Check_Semantics after generating an error message.
765 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
766 -- GNAT
767 -- Indicates the original operating mode of the compiler as set by
768 -- compiler options. This is identical to Operating_Mode except that
769 -- this is not affected by errors.
771 Optimization_Level : Int;
772 pragma Import (C, Optimization_Level, "optimize");
773 -- This constant reflects the optimization level (0,1,2 for -O0,-O1,-O2)
775 Output_File_Name_Present : Boolean := False;
776 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
777 -- Set to True when the output C file name is given with option -o
778 -- for GNATBIND, when the object file name is given with option
779 -- -gnatO for GNAT or when the executable is given with option -o
780 -- for GNATMAKE or GPRMAKE.
782 Output_Linker_Option_List : Boolean := False;
783 -- GNATBIND
784 -- True if output of list of linker options is requested (-K switch set)
786 Output_Object_List : Boolean := False;
787 -- GNATBIND
788 -- True if output of list of objects is requested (-O switch set)
790 Persistent_BSS_Mode : Boolean := False;
791 -- GNAT
792 -- True if a Persistent_BSS configuration pragma is in effect, causing
793 -- potentially persistent data to be placed in the persistent_bss section.
795 Pessimistic_Elab_Order : Boolean := False;
796 -- GNATBIND
797 -- True if pessimistic elaboration order is to be chosen (-p switch set)
799 Polling_Required : Boolean := False;
800 -- GNAT
801 -- Set to True if polling for asynchronous abort is enabled by using
802 -- the -gnatP option for GNAT.
804 Preprocessing_Data_File : String_Ptr := null;
805 -- GNAT
806 -- Set by switch -gnatep=. The file name of the prepocessing data file.
808 Print_Generated_Code : Boolean := False;
809 -- GNAT
810 -- Set to True to enable output of generated code in source form. This
811 -- flag is set by the -gnatG switch.
813 Print_Standard : Boolean := False;
814 -- GNAT
815 -- Set to true to enable printing of package standard in source form.
816 -- This flag is set by the -gnatS switch
818 Propagate_Exceptions : Boolean := False;
819 -- GNAT
820 -- Indicates if subprogram descriptor exception tables should be
821 -- built for imported subprograms. Set True if a Propagate_Exceptions
822 -- pragma applies to the extended main unit.
824 type Usage is (Unknown, Not_In_Use, In_Use);
825 Project_File_In_Use : Usage := Unknown;
826 -- GNAT
827 -- Indicates if a project file is used or not.
828 -- Set to In_Use by the first SFNP pragma.
831 -- GNAT, GNATBIND
833 -- Reset to first character (uppercase) of locking policy name if a valid
834 -- Queuing_Policy pragma is encountered.
836 Queuing_Policy_Sloc : Source_Ptr := No_Location;
837 -- GNAT, GNATBIND
838 -- Remember location of previous Queuing_Policy pragma. This is used
839 -- for inconsistency error messages. A value of System_Location is
840 -- used if the policy is set in package System.
842 Quiet_Output : Boolean := False;
843 -- GNATMAKE, GNATCLEAN, GPRMAKE
844 -- Set to True if the tool should not have any output if there are no
845 -- errors or warnings.
847 Replace_In_Comments : Boolean := False;
848 -- GNATPREP
849 -- Set to True if -C switch used
851 RTS_Lib_Path_Name : String_Ptr := null;
852 RTS_Src_Path_Name : String_Ptr := null;
853 -- GNAT
854 -- Set to the "adalib" and "adainclude" directories of the run time
855 -- specified by --RTS=.
857 RTS_Switch : Boolean := False;
858 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
859 -- Set to True when the --RTS switch is set
861 Run_Path_Option : Boolean := True;
862 -- GNATMAKE, GNATLINK
863 -- Set to False when no run_path_option should be issued to the linker
865 Search_Directory_Present : Boolean := False;
866 -- GNAT
867 -- Set to True when argument is -I. Reset to False when next argument,
868 -- a search directory path is taken into account. Note that this is
869 -- quite different from other switches in this section in that it is
870 -- only set in a transitory manner as a result of scanning a -I switch
871 -- with no file name, and if set, is an indication that the next argument
872 -- is to be treated as a file name.
874 Sec_Stack_Used : Boolean := False;
875 -- GNAT, GBATBIND
876 -- Set True if generated code uses the System.Secondary_Stack package.
877 -- For the binder, set if any unit uses the secondary stack package.
879 Setup_Projects : Boolean := False;
880 -- GNAT DRIVER
881 -- Set to True for GNAT SETUP: the Project Manager creates non existing
882 -- object, library and exec directories.
884 Shared_Libgnat : Boolean;
885 -- GNATBIND
886 -- Set to True if a shared libgnat is requested by using the -shared
887 -- option for GNATBIND and to False when using the -static option. The
888 -- value of this flag is set by Gnatbind.Scan_Bind_Arg.
890 Stack_Checking_Enabled : Boolean;
891 -- GNAT
892 -- Set to indicate if -fstack-check switch is set for the compilation. True
893 -- means that the switch is set, so that stack checking is enabled. False
894 -- means that the switch is not set (no stack checking). This value is
895 -- obtained from the external imported value flag_stack_check in the gcc
896 -- backend (see Frontend) and may be referenced throughout the compilation
897 -- phases.
899 Style_Check : Boolean := False;
900 -- GNAT
901 -- Set True to perform style checks. Activates checks carried out
902 -- in package Style (see body of this package for details of checks)
903 -- This flag is set True by either the -gnatg or -gnaty switches.
905 System_Extend_Pragma_Arg : Node_Id := Empty;
906 -- GNAT
907 -- Set non-empty if and only if a correct Extend_System pragma was present
908 -- in which case it points to the argument of the pragma, and the name can
909 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
911 System_Extend_Unit : Node_Id := Empty;
912 -- GNAT
913 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
914 -- is never appropriate in GNAT_Mode (and causes troubles, including
915 -- bogus circularities, if we try to compile the run-time library with
916 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
917 -- is a copy of the value set in System_Extend_Pragma_Arg.
919 Subunits_Missing : Boolean := False;
920 -- GNAT
921 -- This flag is set true if missing subunits are detected with code
922 -- generation active. This causes code generation to be skipped.
924 Suppress_Checks : Boolean := False;
925 -- GNAT
926 -- Set to True if -gnatp (suppress all checks) switch present.
928 Suppress_Options : Suppress_Array;
929 -- GNAT
930 -- Flags set True to suppress corresponding check, i.e. add an implicit
931 -- pragma Suppress at the outer level of each unit compiled. Note that
932 -- these suppress actions can be overridden by the use of the Unsuppress
933 -- pragma. This variable is initialized by Osint.Initialize.
935 Suppress_Back_Annotation : Boolean := False;
936 -- GNAT
937 -- This flag is set True if back annotation of representation information
938 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
939 -- This avoids unnecessary time being spent on back annotation.
941 Table_Factor : Int := 1;
942 -- GNAT
943 -- Factor by which all initial table sizes set in Alloc are multiplied.
944 -- Used in Table to calculate initial table sizes (the initial table size
945 -- is the value in Alloc, used as the Table_Initial parameter value,
946 -- multiplied by the factor given here. The default value is used if no
947 -- -gnatT switch appears.
950 -- GNAT, GNATBIND
952 -- Reset to first character (uppercase) of task dispatching policy name
953 -- if a valid Task_Dispatching_Policy pragma is encountered.
955 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
956 -- GNAT, GNATBIND
957 -- Remember location of previous Task_Dispatching_Policy pragma. This is
958 -- used for inconsistency error messages. A value of System_Location is
959 -- used if the policy is set in package System.
961 Tasking_Used : Boolean := False;
962 -- Set True if any tasking construct is encountered. Used to activate the
963 -- output of the Q, L and T lines in ALI files.
965 Time_Slice_Set : Boolean := False;
966 -- GNATBIND
967 -- Set True if a pragma Time_Slice is processed in the main unit, or
968 -- if the -gnatTnn switch is present to set a time slice value.
970 Time_Slice_Value : Nat;
971 -- GNATBIND
972 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
973 -- Time_Slice pragma has been processed. Set to the time slice value in
974 -- microseconds. Negative values are stored as zero, and the value is not
975 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
976 -- reset to this maximum. This can also be set with the -gnatTnn switch.
978 Tolerate_Consistency_Errors : Boolean := False;
979 -- GNATBIND
980 -- Tolerate time stamp and other consistency errors. If this flag is set to
981 -- True (-t), then inconsistencies result in warnings rather than errors.
983 Tree_Output : Boolean := False;
984 -- GNAT
985 -- Set to True (-gnatt) to generate output tree file
987 Try_Semantics : Boolean := False;
988 -- GNAT
989 -- Flag set to force attempt at semantic analysis, even if parser errors
990 -- occur. This will probably cause blowups at this stage in the game. On
991 -- the other hand, most such blowups will be caught cleanly and simply
992 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
994 Undefined_Symbols_Are_False : Boolean := False;
995 -- GNAT, GNATPREP
996 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
997 -- file for the compiler. Indicates that while preprocessing sources,
998 -- symbols that are not defined have the value FALSE.
1000 Unique_Error_Tag : Boolean := Tag_Errors;
1001 -- GNAT
1002 -- Indicates if error messages are to be prefixed by the string error:
1003 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1005 Universal_Addressing_On_AAMP : Boolean := False;
1006 -- GNAAMP
1007 -- Indicates if library-level objects should be accessed and updated using
1008 -- universal addressing instructions on the AAMP architecture. This flag is
1009 -- set to True when pragma Universal_Data is given as a configuration
1010 -- pragma.
1012 Unreserve_All_Interrupts : Boolean := False;
1013 -- GNAT, GNATBIND
1014 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1015 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1016 -- corresponding attribute set in GNATBIND.
1018 Upper_Half_Encoding : Boolean := False;
1019 -- GNAT
1020 -- Normally set False, indicating that upper half ASCII characters are
1021 -- used in the normal way to represent themselves. If the wide character
1022 -- encoding method uses the upper bit for this encoding, then this flag is
1023 -- set True, and upper half characters in the source indicate the start of
1024 -- a wide character sequence.
1026 Usage_Requested : Boolean := False;
1027 -- GNAT, GNATBIND, GNATMAKE
1028 -- Set to True if -h (-gnath for the compiler) switch encountered
1029 -- requesting usage information
1031 Use_Pragma_Linker_Constructor : Boolean := False;
1032 -- GNATBIND
1033 -- True if pragma Linker_Constructor applies to adainit
1035 Use_VADS_Size : Boolean := False;
1036 -- GNAT
1037 -- Set to True if a valid pragma Use_VADS_Size is processed
1039 Validity_Checks_On : Boolean := True;
1040 -- GNAT
1041 -- This flag determines if validity checking is on or off. The initial
1042 -- state is on, and the required default validity checks are active. The
1043 -- actual set of checks that is performed if Validity_Checks_On is set is
1044 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1045 -- is controlled by pragma Validity_Checks (On | Off), and also some
1046 -- generated compiler code (typically code that has to do with validity
1047 -- check generation) is compiled with this flag set to False. This flag is
1048 -- set to False by the -gnatp switch.
1050 Verbose_Mode : Boolean := False;
1051 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1052 -- GPRMAKE
1053 -- Set to True to get verbose mode (full error message text and location
1054 -- information sent to standard output, also header, copyright and summary)
1056 type Verbosity_Level_Type is (None, Low, Medium, High);
1057 Verbosity_Level : Verbosity_Level_Type := High;
1058 -- GNATMAKE, GPRMAKE
1059 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1060 -- the level of verbosity of informational messages:
1061 --
1062 -- In Low Verbosity, the reasons why a source is recompiled, the name
1063 -- of the executable and the reason it must be rebuilt is output.
1064 --
1065 -- In Medium Verbosity, additional lines are output for each ALI file
1066 -- that is checked.
1067 --
1068 -- In High Verbosity, additional lines are output when the ALI file
1069 -- is part of an Ada library, is read-only or is part of the runtime.
1071 Warn_On_Ada_2005_Compatibility : Boolean := True;
1072 -- GNAT
1073 -- Set to True to active all warnings on Ada 2005 compatibility issues,
1074 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1075 -- mode. Set False by -gnatwY.
1077 Warn_On_Bad_Fixed_Value : Boolean := False;
1078 -- GNAT
1079 -- Set to True to generate warnings for static fixed-point expression
1080 -- values that are not an exact multiple of the small value of the type.
1082 Warn_On_Constant : Boolean := False;
1083 -- GNAT
1084 -- Set to True to generate warnings for variables that could be declared
1085 -- as constants. Modified by use of -gnatwk/K.
1087 Warn_On_Dereference : Boolean := False;
1088 -- GNAT
1089 -- Set to True to generate warnings for implicit dereferences for array
1090 -- indexing and record component access. Modified by use of -gnatwd/D.
1092 Warn_On_Export_Import : Boolean := True;
1093 -- GNAT
1094 -- Set to True to generate warnings for suspicious use of export or
1095 -- import pragmas. Modified by use of -gnatwx/X.
1097 Warn_On_Hiding : Boolean := False;
1098 -- GNAT
1099 -- Set to True to generate warnings if a declared entity hides another
1100 -- entity. The default is that this warning is suppressed.
1102 Warn_On_Modified_Unread : Boolean := False;
1103 -- GNAT
1104 -- Set to True to generate warnings if a variable is assigned but is never
1105 -- read. The default is that this warning is suppressed.
1107 Warn_On_No_Value_Assigned : Boolean := True;
1108 -- GNAT
1109 -- Set to True to generate warnings if no value is ever assigned to a
1110 -- variable that is at least partially uninitialized. Set to false to
1111 -- suppress such warnings. The default is that such warnings are enabled.
1113 Warn_On_Obsolescent_Feature : Boolean := False;
1114 -- GNAT
1115 -- Set to True to generate warnings on use of any feature in Annex or if a
1116 -- subprogram is called for which a pragma Obsolescent applies.
1118 Warn_On_Redundant_Constructs : Boolean := False;
1119 -- GNAT
1120 -- Set to True to generate warnings for redundant constructs (e.g. useless
1121 -- assignments/conversions). The default is that this warning is disabled.
1123 Warn_On_Unchecked_Conversion : Boolean := True;
1124 -- GNAT
1125 -- Set to True to generate warnings for unchecked conversions that may have
1126 -- non-portable semantics (e.g. because sizes of types differ). The default
1127 -- is that this warning is enabled.
1129 Warn_On_Unrecognized_Pragma : Boolean := True;
1130 -- GNAT
1131 -- Set to True to generate warnings for unrecognized pragmas. The default
1132 -- is that this warning is enabled.
1134 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1135 Warning_Mode : Warning_Mode_Type := Normal;
1136 -- GNAT, GNATBIND
1137 -- Controls treatment of warning messages. If set to Suppress, warning
1138 -- messages are not generated at all. In Normal mode, they are generated
1139 -- but do not count as errors. In Treat_As_Error mode, warning messages
1140 -- are generated and are treated as errors.
1142 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1143 -- GNAT
1144 -- Method used for encoding wide characters in the source program. See
1145 -- description of type in unit System.WCh_Con for a list of the methods
1146 -- that are currently supported. Note that brackets notation is always
1147 -- recognized in source programs regardless of the setting of this
1148 -- variable. The default setting causes only the brackets notation to be
1149 -- recognized. If this is the main unit, this setting also controls the
1150 -- output of the W=? parameter in the ALI file, which is used to provide
1151 -- the default for Wide_Text_IO files.
1153 Xref_Active : Boolean := True;
1154 -- GNAT
1155 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1157 ----------------------------
1158 -- Configuration Settings --
1159 ----------------------------
1161 -- These are settings that are used to establish the mode at the start of
1162 -- each unit. The values defined below can be affected either by command
1163 -- line switches, or by the use of appropriate configuration pragmas in the
1164 -- gnat.adc file.
1166 Ada_Version_Config : Ada_Version_Type;
1167 -- GNAT
1168 -- This is the value of the configuration switch for the Ada 83 mode, as
1169 -- set by the command line switches -gnat83/95/05, and possibly modified by
1170 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1171 -- to set the initial value for Ada_Version mode at the start of analysis
1172 -- of a unit. Note however, that the setting of this flag is ignored for
1173 -- internal and predefined units (which are always compiled in the most up
1174 -- to date version of Ada).
1176 Ada_Version_Explicit_Config : Ada_Version_Type;
1177 -- GNAT
1178 -- This is set in the same manner as Ada_Version_Config. The difference is
1179 -- that the setting of this flag is not ignored for internal and predefined
1180 -- units, which for some purposes do indeed access this value, regardless
1181 -- of the fact that they are compiled the the most up to date ada version).
1183 Assertions_Enabled_Config : Boolean;
1184 -- GNAT
1185 -- This is the value of the configuration switch for assertions enabled
1186 -- mode, as possibly set by the command line switch -gnata, and possibly
1187 -- modified by the use of the configuration pragma Assertion_Policy.
1189 Debug_Pragmas_Enabled_Config : Boolean;
1190 -- GNAT
1191 -- This is the value of the configuration switch for debug pragmas enabled
1192 -- mode, as possibly set by the command line switch -gnata and possibly
1193 -- modified by the use of the configuration pragma Debug_Policy.
1195 Dynamic_Elaboration_Checks_Config : Boolean := False;
1196 -- GNAT
1197 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1198 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1200 Exception_Locations_Suppressed_Config : Boolean := False;
1201 -- GNAT
1202 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1204 Extensions_Allowed_Config : Boolean;
1205 -- GNAT
1206 -- This is the flag that indicates whether extensions are allowed. It can
1207 -- be set True either by use of the -gnatX switch, or by use of the
1208 -- configuration pragma Extensions_Allowed (On). It is always set to True
1209 -- for internal GNAT units, since extensions are always permitted in such
1210 -- units.
1212 External_Name_Exp_Casing_Config : External_Casing_Type;
1213 -- GNAT
1214 -- This is the value of the configuration switch that controls casing of
1215 -- external symbols for which an explicit external name is given. It can be
1216 -- set to Uppercase by the command line switch -gnatF, and further modified
1217 -- by the use of the configuration pragma External_Name_Casing in the
1218 -- gnat.adc file. This flag is used to set the initial value for
1219 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1220 -- however that the setting of this flag is ignored for internal and
1221 -- predefined units (which are always compiled with As_Is mode).
1223 External_Name_Imp_Casing_Config : External_Casing_Type;
1224 -- GNAT
1225 -- This is the value of the configuration switch that controls casing of
1226 -- external symbols where the external name is implicitly given. It can be
1227 -- set to Uppercase by the command line switch -gnatF, and further modified
1228 -- by the use of the configuration pragma External_Name_Casing in the
1229 -- gnat.adc file. This flag is used to set the initial value for
1230 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1231 -- however that the setting of this flag is ignored for internal and
1232 -- predefined units (which are always compiled with Lowercase mode).
1234 Persistent_BSS_Mode_Config : Boolean;
1235 -- GNAT
1236 -- This is the value of the configuration switch that controls whether
1237 -- potentially persistent data is to be placed in the persistent_bss
1238 -- section. It can be set True by use of the pragma Persistent_BSS.
1239 -- This flag is used to set the initial value of Persistent_BSS_Mode
1240 -- at the start of each compilation unit, except that it is always
1241 -- set False for predefined units.
1243 Polling_Required_Config : Boolean;
1244 -- GNAT
1245 -- This is the value of the configuration switch that controls polling
1246 -- mode. It can be set True by the command line switch -gnatP, and then
1247 -- further modified by the use of pragma Polling in the gnat.adc file. This
1248 -- flag is used to set the initial value for Polling_Required at the start
1249 -- of analyzing each unit.
1251 Use_VADS_Size_Config : Boolean;
1252 -- GNAT
1253 -- This is the value of the configuration switch that controls the use of
1254 -- VADS_Size instead of Size whereever the attribute Size is used. It can
1255 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1256 -- This flag is used to set the initial value for Use_VADS_Size at the
1257 -- start of analyzing each unit. Note however that the setting of this flag
1258 -- is ignored for internal and predefined units (which are always compiled
1259 -- with the standard Size semantics).
1261 type Config_Switches_Type is private;
1262 -- Type used to save values of the switches set from Config values
1264 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1265 -- This procedure saves the current values of the switches which are
1266 -- initialized from the above Config values, and then resets these switches
1267 -- according to the Config value settings.
1269 procedure Set_Opt_Config_Switches
1270 (Internal_Unit : Boolean;
1271 Main_Unit : Boolean);
1272 -- This procedure sets the switches to the appropriate initial values. The
1273 -- parameter Internal_Unit is True for an internal or predefined unit, and
1274 -- affects the way the switches are set (see above). Main_Unit is true if
1275 -- switches are being set for the main unit (this affects setting of the
1276 -- assert/debug pragm switches, which are normally set false by default for
1277 -- an internal unit, except when the internal unit is the main unit, in
1278 -- which case we use the command line settings).
1280 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1281 -- This procedure restores a set of switch values previously saved by a
1282 -- call to Save_Opt_Switches.
1284 procedure Register_Opt_Config_Switches;
1285 -- This procedure is called after processing the gnat.adc file to record
1286 -- the values of the Config switches, as possibly modified by the use of
1287 -- command line switches and configuration pragmas.
1289 ------------------------
1290 -- Other Global Flags --
1291 ------------------------
1293 Expander_Active : Boolean := False;
1294 -- A flag that indicates if expansion is active (True) or deactivated
1295 -- (False). When expansion is deactivated all calls to expander routines
1296 -- have no effect. Note that the initial setting of False is merely to
1297 -- prevent saving of an undefined value for an initial call to the
1298 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1299 -- this flag, see package Expander. Indeed this flag might more logically
1300 -- be in the spec of Expander, but it is referenced by Errout, and it
1301 -- really seems wrong for Errout to depend on Expander.
1303 -----------------------
1304 -- Tree I/O Routines --
1305 -----------------------
1307 procedure Tree_Read;
1308 -- Reads switch settings from current tree file using Tree_Read
1310 procedure Tree_Write;
1311 -- Writes out switch settings to current tree file using Tree_Write
1313 --------------------------
1314 -- ASIS Version Control --
1315 --------------------------
1317 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1318 -- are supposed to be used in the GNAT/ASIS version check performed in
1319 -- the ASIS code (this package is also a part of the ASIS implementation).
1320 -- They are set by Tree_Read procedure, so they represent the version
1321 -- number (and the version string) of the compiler which has created the
1322 -- tree, and they are supposed to be compared with the corresponding values
1323 -- from the Gnatvsn package which is a part of ASIS implementation.
1325 Tree_Version_String : String_Access;
1326 -- Used to store the compiler version string read from a tree file to check
1327 -- if it is from the same date as stored in the version string in Gnatvsn.
1328 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1329 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1330 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1331 -- of the corresponding source sets, using version strings that may be
1332 -- of different lengths.
1334 Tree_ASIS_Version_Number : Int;
1335 -- Used to store the ASIS version number read from a tree file to check if
1336 -- it is the same as stored in the ASIS version number in Gnatvsn.
1338 private
1340 -- The following type is used to save and restore settings of switches in
1341 -- Opt that represent the configuration (i.e. result of config pragmas).
1343 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1344 -- flag that once set does not get reset, since the whole idea of this flag
1345 -- is to record the setting for the main unit.
1347 type Config_Switches_Type is record
1348 Ada_Version : Ada_Version_Type;
1349 Ada_Version_Explicit : Ada_Version_Type;
1350 Assertions_Enabled : Boolean;
1351 Debug_Pragmas_Enabled : Boolean;
1352 Dynamic_Elaboration_Checks : Boolean;
1353 Exception_Locations_Suppressed : Boolean;
1354 Extensions_Allowed : Boolean;
1355 External_Name_Exp_Casing : External_Casing_Type;
1356 External_Name_Imp_Casing : External_Casing_Type;
1357 Persistent_BSS_Mode : Boolean;
1358 Polling_Required : Boolean;
1359 Use_VADS_Size : Boolean;
1360 end record;
1362 end Opt;