1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 -- This package contains global flags set by the initialization routine from
35 -- the command line and referenced throughout the compiler, the binder, or
36 -- other GNAT tools. The comments indicate which options are used by which
37 -- programs (GNAT, GNATBIND, GNATLINK, GNATMAKE, GPRMAKE, etc).
39 with Gnatvsn; use Gnatvsn;
40 with Hostparm; use Hostparm;
41 with Types; use Types;
43 with System.WCh_Con; use System.WCh_Con;
44 with GNAT.Strings; use GNAT.Strings;
48 ----------------------------------------------
49 -- Settings of Modes for Current Processing --
50 ----------------------------------------------
52 -- The following mode values represent the current state of processing.
53 -- The values set here are the default values. Unless otherwise noted,
54 -- the value may be reset in Switch with an appropropiate switch. In
55 -- some cases, the values can also be modified by pragmas, and in the
56 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
57 -- the default values.
59 Ada_Bind_File : Boolean := True;
61 -- Set True if binder file to be generated in Ada rather than C
63 type Ada_Version_Type is (Ada_83, Ada_95, Ada_05);
64 pragma Warnings (Off, Ada_Version_Type);
65 -- Versions of Ada for Ada_Version below. Note that these are ordered,
66 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
67 -- The Warnings_Off pragma stops warnings for Ada_Version >= Ada_05,
68 -- which we want to allow, so that things work OK when Ada_15 is added!
69 -- This warning is now removed, so this pragma can be removed some time???
71 Ada_Version_Default : Ada_Version_Type := Ada_95;
73 -- Default Ada version if no switch given
75 Ada_Version : Ada_Version_Type := Ada_Version_Default;
77 -- Current Ada version for compiler, as set by configuration pragmas,
78 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
79 -- predefined or internal file is compiled.
81 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
83 -- Like Ada_Version, but does not get set implicitly for predefined
84 -- or internal units, so it reflects the Ada version explicitly set
85 -- using configuration pragmas or compiler switches (or if neither
86 -- appears, it remains set to Ada_Version_Default). This is used in
87 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
88 -- where in the run-time we want the explicit version set.
90 Ada_Version_Runtime : Ada_Version_Type := Ada_05;
92 -- Ada version used to compile the runtime. Used to set Ada_Version (but
93 -- not Ada_Version_Explicit) when compiling predefined or internal units.
95 Ada_Final_Suffix : constant String := "final";
96 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
98 -- The name of the procedure that performs the finalization at the end of
99 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
101 Ada_Init_Suffix : constant String := "init";
102 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
104 -- The name of the procedure that performs initialization at the start
105 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
107 Ada_Main_Name_Suffix : constant String := "main";
109 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
110 -- can be referenced in a uniform manner to create either the default
111 -- value of Ada_Main_Name (declared below), or the non-default name
112 -- set by Gnatbind.Scan_Bind_Arg.
114 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
116 -- The name of the Ada package generated by the binder (when in Ada mode).
117 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
119 Address_Clause_Overlay_Warnings : Boolean := True;
121 -- Set False to disable address clause warnings
123 Address_Is_Private : Boolean := False;
125 -- Set True if package System has the line "type Address is private;"
127 All_Errors_Mode : Boolean := False;
129 -- Flag set to force display of multiple errors on a single line and
130 -- also repeated error messages for references to undefined identifiers
131 -- and certain other repeated error messages.
133 All_Sources : Boolean := False;
135 -- Set to True to require all source files to be present. This flag is
136 -- directly modified by gnatmake to affect the shared binder routines.
138 Alternate_Main_Name : String_Ptr := null;
140 -- Set to non null when Bind_Alternate_Main_Name is True. This value
141 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
143 Assertions_Enabled : Boolean := False;
145 -- Enable assertions made using pragma Assert
147 ASIS_Mode : Boolean := False;
149 -- Enable semantic checks and tree transformations that are important
150 -- for ASIS but that are usually skipped if Operating_Mode is set to
151 -- Check_Semantics. This flag does not have the corresponding option to set
152 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
153 -- from the code of GNSA-based tool (a client may need to set ON the
154 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
155 -- make very much sense, because GNSA cannot do back annotation).
157 Back_Annotate_Rep_Info : Boolean := False;
159 -- If set True, enables back annotation of representation information
160 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
161 -- (list representation information) or -gnatt (generate tree). It is
162 -- also set true if certain Unchecked_Conversion instantiations require
163 -- checking based on annotated values.
165 Bind_Alternate_Main_Name : Boolean := False;
167 -- True if main should be called Alternate_Main_Name.all.
168 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
170 Bind_Main_Program : Boolean := True;
172 -- Set to False if not binding main Ada program
174 Bind_For_Library : Boolean := False;
176 -- Set to True if the binder needs to generate a file designed for
177 -- building a library. May be set to True by Gnatbind.Scan_Bind_Arg.
179 Bind_Only : Boolean := False;
181 -- Set to True to skip compile and link steps
182 -- (except when Compile_Only and/or Link_Only are True).
184 Blank_Deleted_Lines : Boolean := False;
186 -- Output empty lines for each line of preprocessed input that is deleted
187 -- in the output, including preprocessor lines starting with a '#'.
189 Brief_Output : Boolean := False;
191 -- Force brief error messages to standard error, even if verbose mode is
192 -- set (so that main error messages go to standard output).
194 Build_Bind_And_Link_Full_Project : Boolean := False;
196 -- Set to True to build, bind and link all the sources of a project file
199 Check_Object_Consistency : Boolean := False;
200 -- GNATBIND, GNATMAKE
201 -- Set to True to check whether every object file is consistent with
202 -- its corresponding ada library information (ALI) file. An object
203 -- file is inconsistent with the corresponding ALI file if the object
204 -- file does not exist or if it has an older time stamp than the ALI file.
205 -- Default above is for GNATBIND. GNATMAKE overrides this default to
206 -- True (see Make.Initialize) since we normally do need to check source
207 -- consistencies in gnatmake.
209 Check_Only : Boolean := False;
211 -- Set to True to do checks only, no output of binder file
213 Check_Readonly_Files : Boolean := False;
215 -- Set to True to check readonly files during the make process
217 Check_Source_Files : Boolean := True;
218 -- GNATBIND, GNATMAKE
219 -- Set to True to enable consistency checking for any source files that
220 -- are present (i.e. date must match the date in the library info file).
221 -- Set to False for object file consistency check only. This flag is
222 -- directly modified by gnatmake, to affect the shared binder routines.
224 Check_Switches : Boolean := False;
226 -- Set to True to check compiler options during the make process
228 Check_Unreferenced : Boolean := False;
230 -- Set to True to enable checking for unreferenced entities other
231 -- than formal parameters (for which see Check_Unreferenced_Formals)
233 Check_Unreferenced_Formals : Boolean := False;
235 -- Set True to check for unreferenced formals. This is turned on by
236 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
238 Check_Withs : Boolean := False;
240 -- Set to True to enable checking for unused withs, and also the case
241 -- of withing a package and using none of the entities in the package.
243 Comment_Deleted_Lines : Boolean := False;
245 -- True if source lines removed by the preprocessor should be commented
246 -- in the output file.
248 Compile_Only : Boolean := False;
249 -- GNATMAKE, GNATCLEAN, GPRMAKE
250 -- GNATMAKE, GPRMAKE: set to True to skip bind and link steps (except when
251 -- Bind_Only is True).
252 -- GNATCLEAN: set to True to only the files produced by the compiler are to
253 -- be deleted, but not the library files or executable files.
255 Config_File : Boolean := True;
257 -- Set to False to inhibit reading and processing of gnat.adc file
259 Config_File_Names : String_List_Access := null;
261 -- Names of configuration pragmas files (given by switches -gnatec)
263 Configurable_Run_Time_Mode : Boolean := False;
265 -- Set True if the compiler is operating in configurable run-time mode.
266 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
267 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
268 -- for details on the handling of the latter pragma.
270 Constant_Condition_Warnings : Boolean := False;
272 -- Set to True to activate warnings on constant conditions
274 Create_Mapping_File : Boolean := False;
276 -- Set to True (-C switch) to indicate that the compiler will be invoked
277 -- with a mapping file (-gnatem compiler switch).
279 Debug_Pragmas_Enabled : Boolean := False;
281 -- Enable debug statements from pragma Debug
283 subtype Debug_Level_Value is Nat range 0 .. 3;
284 Debugger_Level : Debug_Level_Value := 0;
286 -- The value given to the -g parameter. The default value for -g with
287 -- no value is 2. This is usually ignored by GNATBIND, except in the
288 -- VMS version where it is passed as an argument to __gnat_initialize
289 -- to trigger the activation of the remote debugging interface.
290 -- Is this still true ???
292 Debug_Generated_Code : Boolean := False;
294 -- Set True (-gnatD switch) to debug generated expanded code instead
295 -- of the original source code. Causes debugging information to be
296 -- written with respect to the generated code file that is written.
298 Default_Exit_Status : Int := 0;
300 -- Set the default exit status value. Set by the -Xnnn switch for the
303 Default_Sec_Stack_Size : Int := -1;
305 -- Set to default secondary stack size in units of kilobytes. Set by
306 -- the -Dnnn switch for the binder. A value of -1 indicates that no
307 -- default was set by the binder, and that the default should be the
308 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
310 Detect_Blocking : Boolean := False;
312 -- Set True to force the run time to raise Program_Error if calls to
313 -- potentially blocking operations are detected from protected actions.
315 Display_Compilation_Progress : Boolean := False;
317 -- Set True (-d switch) to display information on progress while compiling
318 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
320 type Distribution_Stub_Mode_Type is
323 -- Normal mode, no generation/compilation of distribution stubs
325 Generate_Receiver_Stub_Body,
326 -- The unit being compiled is the RCI body, and the compiler will
327 -- generate the body for the receiver stubs and compile it.
329 Generate_Caller_Stub_Body);
330 -- The unit being compiled is the RCI spec, and the compiler will
331 -- generate the body for the caller stubs and compile it.
333 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
335 -- This enumeration variable indicates the five states of distribution
336 -- annex stub generation/compilation.
338 Do_Not_Execute : Boolean := False;
340 -- Set to True if no actual compilations should be undertaken.
342 Dynamic_Elaboration_Checks : Boolean := False;
344 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
345 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
347 Dynamic_Stack_Measurement : Boolean := False;
349 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
351 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
353 -- Number of measurements we want to store during dynamic stack analysis.
354 -- When the buffer is full, non-storable results will be output on the fly.
355 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
356 -- by processing of -u flag for gnatbind.
358 Elab_Dependency_Output : Boolean := False;
360 -- Set to True to output complete list of elaboration constraints
362 Elab_Order_Output : Boolean := False;
364 -- Set to True to output chosen elaboration order
366 Elab_Warnings : Boolean := False;
368 -- Set to True to generate full elaboration warnings (-gnatwl)
370 Enable_Overflow_Checks : Boolean := False;
372 -- Set to True if -gnato (enable overflow checks) switch is set,
375 Exception_Locations_Suppressed : Boolean := False;
377 -- This flag is set True if a Suppress_Exception_Locations configuration
378 -- pragma is currently active.
380 type Exception_Mechanism_Type is
381 -- Determines the handling of exceptions. See Exp_Ch11 for details
383 (Front_End_Setjmp_Longjmp_Exceptions,
384 -- Exceptions use setjmp/longjmp generated explicitly by the
385 -- front end (this includes gigi or other equivalent parts of
386 -- the code generator). AT END handlers are converted into
387 -- exception handlers by the front end in this mode.
389 Back_End_Exceptions);
390 -- Exceptions are handled by the back end. The front end simply
391 -- generates the handlers as they appear in the source, and AT
392 -- END handlers are left untouched (they are not converted into
393 -- exception handlers when operating in this mode.
394 pragma Convention (C, Exception_Mechanism_Type);
396 Exception_Mechanism : Exception_Mechanism_Type :=
397 Front_End_Setjmp_Longjmp_Exceptions;
399 -- Set to the appropriate value depending on the default as given in
400 -- system.ads (ZCX_By_Default, GCC_ZCX_Support).
401 -- The C convention is there to make this variable accessible to gigi.
403 Exception_Tracebacks : Boolean := False;
405 -- Set to True to store tracebacks in exception occurrences (-E)
407 Extensions_Allowed : Boolean := False;
409 -- Set to True by switch -gnatX if GNAT specific language extensions
410 -- are allowed. For example, "limited with" is a GNAT extension.
412 type External_Casing_Type is (
413 As_Is, -- External names cased as they appear in the Ada source
414 Uppercase, -- External names forced to all uppercase letters
415 Lowercase); -- External names forced to all lowercase letters
417 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
419 -- The setting of this flag determines the casing of external names
420 -- when the name is implicitly derived from an entity name (i.e. either
421 -- no explicit External_Name or Link_Name argument is used, or, in the
422 -- case of extended DEC pragmas, the external name is given using an
423 -- identifier. The As_Is setting is not permitted here (since this would
424 -- create Ada source programs that were case sensitive).
426 External_Name_Exp_Casing : External_Casing_Type := As_Is;
428 -- The setting of this flag determines the casing of an external name
429 -- specified explicitly with a string literal. As_Is means the string
430 -- literal is used as given with no modification to the casing. If
431 -- Lowercase or Uppercase is set, then the string is forced to all
432 -- lowercase or all uppercase letters as appropriate. Note that this
433 -- setting has no effect if the external name is given using an identifier
434 -- in the case of extended DEC import/export pragmas (in this case the
435 -- casing is controlled by External_Name_Imp_Casing), and also has no
436 -- effect if an explicit Link_Name is supplied (a link name is always
437 -- used exactly as given).
439 External_Unit_Compilation_Allowed : Boolean := False;
441 -- When True (set by gnatmake switch -x), allow compilation of sources
442 -- that are not part of any project file.
444 Float_Format : Character := ' ';
446 -- A non-blank value indicates that a Float_Format pragma has been
447 -- processed, in which case this variable is set to 'I' for IEEE or
448 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
451 Float_Format_Long : Character := ' ';
453 -- A non-blank value indicates that a Long_Float pragma has been
454 -- processed (this pragma is recognized only in OpenVMS versions
455 -- of GNAT), in which case this variable is set to D or G for
456 -- D_Float or G_Float.
458 Force_ALI_Tree_File : Boolean := False;
460 -- Force generation of ALI file even if errors are encountered.
461 -- Also forces generation of tree file if -gnatt is also set.
463 Force_Checking_Of_Elaboration_Flags : Boolean := False;
465 -- True if binding with forced checking of the elaboration flags
468 Force_Compilations : Boolean := False;
470 -- Set to force recompilations even when the objects are up-to-date.
472 Full_Path_Name_For_Brief_Errors : Boolean := False;
473 -- GNAT, GNATMAKE, GNATCLEAN, GPRMAKE
474 -- When True, in Brief_Output mode, each error message line
475 -- will start with the full path name of the source.
476 -- When False, only the file name without directory information
479 Full_List : Boolean := False;
481 -- Set True to generate full source listing with embedded errors
483 function get_gcc_version return Int;
484 pragma Import (C, get_gcc_version, "get_gcc_version");
486 GCC_Version : constant Nat := get_gcc_version;
488 -- Indicates which version of gcc is in use (2 = 2.8.1, 3 = 3.x)
490 Global_Discard_Names : Boolean := False;
492 -- Set true if a pragma Discard_Names applies to the current unit
494 GNAT_Mode : Boolean := False;
496 -- True if compiling in GNAT system mode (-gnatg switch)
498 HLO_Active : Boolean := False;
500 -- True if High Level Optimizer is activated (-gnatH switch)
502 Implementation_Unit_Warnings : Boolean := True;
504 -- Set True to active warnings for use of implementation internal units.
505 -- Can be controlled by use of -gnatwi/-gnatwI.
507 Identifier_Character_Set : Character;
509 -- This variable indicates the character set to be used for identifiers.
510 -- The possible settings are:
511 -- '1' Latin-5 (ISO-8859-1)
512 -- '2' Latin-5 (ISO-8859-2)
513 -- '3' Latin-5 (ISO-8859-3)
514 -- '4' Latin-5 (ISO-8859-4)
515 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
516 -- '9' Latin-5 (ISO-8859-9)
517 -- 'p' PC (US, IBM page 437)
518 -- '8' PC (European, IBM page 850)
519 -- 'f' Full upper set (all distinct)
520 -- 'n' No upper characters (Ada 83 rules)
521 -- 'w' Latin-1 plus wide characters allowed in identifiers
523 -- The setting affects the set of letters allowed in identifiers and the
524 -- upper/lower case equivalences. It does not affect the interpretation of
525 -- character and string literals, which are always stored using the actual
526 -- coding in the source program. This variable is initialized to the
527 -- default value appropriate to the system (in Osint.Initialize), and then
528 -- reset if a command line switch is used to change the setting.
530 Ineffective_Inline_Warnings : Boolean := False;
532 -- Set True to activate warnings if front-end inlining (-gnatN) is not
533 -- able to actually inline a particular call (or all calls). Can be
534 -- controlled by use of -gnatwp/-gnatwP.
536 Init_Or_Norm_Scalars : Boolean := False;
538 -- Set True if a pragma Initialize_Scalars applies to the current unit.
539 -- Also set True if a pragma Normalize_Scalars applies.
541 Initialize_Scalars : Boolean := False;
543 -- Set True if a pragma Initialize_Scalars applies to the current unit.
544 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
546 Initialize_Scalars_Mode1 : Character := 'I';
547 Initialize_Scalars_Mode2 : Character := 'N';
549 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
550 -- is IN (invalid values), used if no -S switch is used.
552 Inline_Active : Boolean := False;
554 -- Set True to activate pragma Inline processing across modules. Default
555 -- for now is not to inline across module boundaries.
557 Interface_Library_Unit : Boolean := False;
559 -- Set to True to indicate that at least one ALI file is an interface ALI:
560 -- then elaboration flag checks are to be generated in the binder
563 Follow_Links : Boolean := False;
565 -- Set to True (-eL) to process the project files in trusted mode
567 Front_End_Inlining : Boolean := False;
569 -- Set True to activate inlining by front-end expansion
571 Inline_Processing_Required : Boolean := False;
573 -- Set True if inline processing is required. Inline processing is
574 -- required if an active Inline pragma is processed. The flag is set
575 -- for a pragma Inline or Inline_Always that is actually active.
577 In_Place_Mode : Boolean := False;
579 -- Set True to store ALI and object files in place ie in the object
580 -- directory if these files already exist or in the source directory
583 Keep_Going : Boolean := False;
585 -- When True signals to ignore compilation errors and keep
586 -- processing sources until there is no more work.
588 Keep_Temporary_Files : Boolean := False;
590 -- When True the temporary files created by the GNAT driver are not
591 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
593 Link_Only : Boolean := False;
595 -- Set to True to skip compile and bind steps
596 -- (except when Bind_Only is set to True).
598 List_Restrictions : Boolean := False;
600 -- Set to True to list restrictions pragmas that could apply to partition
602 List_Units : Boolean := False;
604 -- List units in the active library for a compilation (-gnatu switch)
606 List_Dependencies : Boolean := False;
608 -- When True gnatmake verifies that the objects are up to date and
609 -- outputs the list of object dependencies (-M switch).
610 -- Output depends if -a switch is used or not.
611 -- This list can be used directly in a Makefile.
613 List_Representation_Info : Int range 0 .. 3 := 0;
615 -- Set non-zero by -gnatR switch to list representation information.
616 -- The settings are as follows:
618 -- 0 = no listing of representation information (default as above)
619 -- 1 = list rep info for user defined record and array types
620 -- 2 = list rep info for all user defined types and objects
621 -- 3 = like 2, but variable fields are decoded symbolically
623 List_Representation_Info_To_File : Boolean := False;
625 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3
626 -- to be written to file.rep (where file is the name of the source
627 -- file) instead of stdout. For example, if file x.adb is compiled
628 -- using -gnatR2s then representation info is written to x.adb.ref.
630 List_Representation_Info_Mechanisms : Boolean := False;
632 -- Set true by -gnatRm switch. Causes information on mechanisms to
633 -- be included in the representation output information.
635 List_Preprocessing_Symbols : Boolean := False;
637 -- Set to True if symbols for preprocessing a source are to be listed
638 -- before preprocessing occurs. Set to True by switch -s of gnatprep
639 -- or -s in preprocessing data file for the compiler.
641 type Creat_Repinfo_File_Proc is access procedure (Src : File_Name_Type);
642 type Write_Repinfo_Line_Proc is access procedure (Info : String);
643 type Close_Repinfo_File_Proc is access procedure;
644 -- Types used for procedure addresses below
646 Creat_Repinfo_File_Access : Creat_Repinfo_File_Proc := null;
647 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
648 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
650 -- These three locations are left null when operating in non-compiler
651 -- (e.g. ASIS mode), but when operating in compiler mode, they are
652 -- set to point to the three corresponding procedures in Osint. The
653 -- reason for this slightly strange interface is to prevent Repinfo
654 -- from dragging in Osint in ASIS mode, which would include a lot of
655 -- unwanted units in the ASIS build.
657 Locking_Policy : Character := ' ';
659 -- Set to ' ' for the default case (no locking policy specified).
660 -- Reset to first character (uppercase) of locking policy name if a
661 -- valid pragma Locking_Policy is encountered.
663 Locking_Policy_Sloc : Source_Ptr := No_Location;
665 -- Remember location of previous Locking_Policy pragma. This is used
666 -- for inconsistency error messages. A value of System_Location is
667 -- used if the policy is set in package System.
669 Look_In_Primary_Dir : Boolean := True;
670 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
671 -- Set to False if a -I- was present on the command line.
672 -- When True we are allowed to look in the primary directory to locate
673 -- other source or library files.
675 Make_Steps : Boolean := False;
677 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
680 Main_Index : Int := 0;
682 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
683 -- the main program is the nnn unit in a multi-unit source file.
685 Mapping_File_Name : String_Ptr := null;
687 -- File name of mapping between unit names, file names and path names.
688 -- (given by switch -gnatem)
690 Maximum_Errors : Int := 9999;
692 -- Maximum default number of errors before compilation is terminated.
693 -- Can be overridden using -gnatm (GNAT) or -m (GNATBIND) switch.
695 Maximum_File_Name_Length : Int;
697 -- Maximum number of characters allowed in a file name, not counting the
698 -- extension, as set by the appropriate switch. If no switch is given,
699 -- then this value is initialized by Osint to the appropriate value.
701 Maximum_Processes : Positive := 1;
703 -- Maximum number of processes that should be spawned to carry out
706 Minimal_Recompilation : Boolean := False;
708 -- Set to True if minimal recompilation mode requested
710 Multiple_Unit_Index : Int;
712 -- This is set non-zero if the current unit is being compiled in multiple
713 -- unit per file mode, meaning that the current unit is selected from the
714 -- sequence of units in the current source file, using the value stored
715 -- in this variable (e.g. 2 = select second unit in file). A value of
716 -- zero indicates that we are in normal (one unit per file) mode.
718 No_Main_Subprogram : Boolean := False;
719 -- GNATMAKE, GNATBIND
720 -- Set to True if compilation/binding of a program without main
721 -- subprogram requested.
723 No_Run_Time_Mode : Boolean := False;
725 -- This flag is set True if a No_Run_Time pragma is encountered. See
726 -- spec of Rtsfind for a full description of handling of this pragma.
728 No_Stdinc : Boolean := False;
729 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
730 -- Set to True if no default source search dirs added to search list
732 No_Stdlib : Boolean := False;
733 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
734 -- Set to True if no default library search dirs added to search list
736 No_Strict_Aliasing : Boolean := False;
738 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
740 Normalize_Scalars : Boolean := False;
742 -- Set True if a pragma Normalize_Scalars applies to the current unit.
743 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
745 Object_Directory_Present : Boolean := False;
747 -- Set to True when an object directory is specified with option -D
749 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
750 Operating_Mode : Operating_Mode_Type := Generate_Code;
752 -- Indicates the operating mode of the compiler. The default is generate
753 -- code, which runs the parser, semantics and backend. Switches can be
754 -- used to set syntax checking only mode, or syntax and semantics checking
755 -- only mode. Operating_Mode can also be modified as a result of detecting
756 -- errors during the compilation process. In particular if any serious
757 -- error is detected then this flag is reset from Generate_Code to
758 -- Check_Semantics after generating an error message.
760 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
762 -- Indicates the original operating mode of the compiler as set by
763 -- compiler options. This is identical to Operating_Mode except that
764 -- this is not affected by errors.
766 Optimization_Level : Int;
767 pragma Import (C, Optimization_Level, "optimize");
768 -- This constant reflects the optimization level (0,1,2 for -O0,-O1,-O2)
770 Output_File_Name_Present : Boolean := False;
771 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
772 -- Set to True when the output C file name is given with option -o
773 -- for GNATBIND, when the object file name is given with option
774 -- -gnatO for GNAT or when the executable is given with option -o
775 -- for GNATMAKE or GPRMAKE.
777 Output_Linker_Option_List : Boolean := False;
779 -- True if output of list of linker options is requested (-K switch set)
781 Output_Object_List : Boolean := False;
783 -- True if output of list of objects is requested (-O switch set)
785 Persistent_BSS_Mode : Boolean := False;
787 -- True if a Persistent_BSS configuration pragma is in effect, causing
788 -- potentially persistent data to be placed in the persistent_bss section.
790 Pessimistic_Elab_Order : Boolean := False;
792 -- True if pessimistic elaboration order is to be chosen (-p switch set)
794 Polling_Required : Boolean := False;
796 -- Set to True if polling for asynchronous abort is enabled by using
797 -- the -gnatP option for GNAT.
799 Preprocessing_Data_File : String_Ptr := null;
801 -- Set by switch -gnatep=. The file name of the prepocessing data file.
803 Print_Generated_Code : Boolean := False;
805 -- Set to True to enable output of generated code in source form. This
806 -- flag is set by the -gnatG switch.
808 Print_Standard : Boolean := False;
810 -- Set to true to enable printing of package standard in source form.
811 -- This flag is set by the -gnatS switch
813 Propagate_Exceptions : Boolean := False;
815 -- Indicates if subprogram descriptor exception tables should be
816 -- built for imported subprograms. Set True if a Propagate_Exceptions
817 -- pragma applies to the extended main unit.
819 type Usage is (Unknown, Not_In_Use, In_Use);
820 Project_File_In_Use : Usage := Unknown;
822 -- Indicates if a project file is used or not.
823 -- Set to In_Use by the first SFNP pragma.
825 Queuing_Policy : Character := ' ';
827 -- Set to ' ' for the default case (no queuing policy specified).
828 -- Reset to first character (uppercase) of locking policy name if a valid
829 -- Queuing_Policy pragma is encountered.
831 Queuing_Policy_Sloc : Source_Ptr := No_Location;
833 -- Remember location of previous Queuing_Policy pragma. This is used
834 -- for inconsistency error messages. A value of System_Location is
835 -- used if the policy is set in package System.
837 Quiet_Output : Boolean := False;
838 -- GNATMAKE, GNATCLEAN, GPRMAKE
839 -- Set to True if the tool should not have any output if there are no
840 -- errors or warnings.
842 Replace_In_Comments : Boolean := False;
844 -- Set to True if -C switch used
846 RTS_Lib_Path_Name : String_Ptr := null;
847 RTS_Src_Path_Name : String_Ptr := null;
849 -- Set to the "adalib" and "adainclude" directories of the run time
850 -- specified by --RTS=.
852 RTS_Switch : Boolean := False;
853 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
854 -- Set to True when the --RTS switch is set
856 Run_Path_Option : Boolean := True;
857 -- GNATMAKE, GNATLINK
858 -- Set to False when no run_path_option should be issued to the linker
860 Sec_Stack_Used : Boolean := False;
862 -- Set True if generated code uses the System.Secondary_Stack package.
863 -- For the binder, set if any unit uses the secondary stack package.
865 Setup_Projects : Boolean := False;
867 -- Set to True for GNAT SETUP: the Project Manager creates non existing
868 -- object, library and exec directories.
870 Shared_Libgnat : Boolean;
872 -- Set to True if a shared libgnat is requested by using the -shared
873 -- option for GNATBIND and to False when using the -static option. The
874 -- value of this flag is set by Gnatbind.Scan_Bind_Arg.
876 Stack_Checking_Enabled : Boolean;
878 -- Set to indicate if -fstack-check switch is set for the compilation. True
879 -- means that the switch is set, so that stack checking is enabled. False
880 -- means that the switch is not set (no stack checking). This value is
881 -- obtained from the external imported value flag_stack_check in the gcc
882 -- backend (see Frontend) and may be referenced throughout the compilation
885 Style_Check : Boolean := False;
887 -- Set True to perform style checks. Activates checks carried out
888 -- in package Style (see body of this package for details of checks)
889 -- This flag is set True by either the -gnatg or -gnaty switches.
891 System_Extend_Pragma_Arg : Node_Id := Empty;
893 -- Set non-empty if and only if a correct Extend_System pragma was present
894 -- in which case it points to the argument of the pragma, and the name can
895 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
897 System_Extend_Unit : Node_Id := Empty;
899 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
900 -- is never appropriate in GNAT_Mode (and causes troubles, including
901 -- bogus circularities, if we try to compile the run-time library with
902 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
903 -- is a copy of the value set in System_Extend_Pragma_Arg.
905 Subunits_Missing : Boolean := False;
907 -- This flag is set true if missing subunits are detected with code
908 -- generation active. This causes code generation to be skipped.
910 Suppress_Checks : Boolean := False;
912 -- Set to True if -gnatp (suppress all checks) switch present.
914 Suppress_Options : Suppress_Array;
916 -- Flags set True to suppress corresponding check, i.e. add an implicit
917 -- pragma Suppress at the outer level of each unit compiled. Note that
918 -- these suppress actions can be overridden by the use of the Unsuppress
919 -- pragma. This variable is initialized by Osint.Initialize.
921 Suppress_Back_Annotation : Boolean := False;
923 -- This flag is set True if back annotation of representation information
924 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
925 -- This avoids unnecessary time being spent on back annotation.
927 Table_Factor : Int := 1;
929 -- Factor by which all initial table sizes set in Alloc are multiplied.
930 -- Used in Table to calculate initial table sizes (the initial table size
931 -- is the value in Alloc, used as the Table_Initial parameter value,
932 -- multiplied by the factor given here. The default value is used if no
933 -- -gnatT switch appears.
935 Task_Dispatching_Policy : Character := ' ';
937 -- Set to ' ' for the default case (no task dispatching policy specified).
938 -- Reset to first character (uppercase) of task dispatching policy name
939 -- if a valid Task_Dispatching_Policy pragma is encountered.
941 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
943 -- Remember location of previous Task_Dispatching_Policy pragma. This is
944 -- used for inconsistency error messages. A value of System_Location is
945 -- used if the policy is set in package System.
947 Tasking_Used : Boolean := False;
948 -- Set True if any tasking construct is encountered. Used to activate the
949 -- output of the Q, L and T lines in ALI files.
951 Time_Slice_Set : Boolean := False;
953 -- Set True if a pragma Time_Slice is processed in the main unit, or
954 -- if the -gnatTnn switch is present to set a time slice value.
956 Time_Slice_Value : Nat;
958 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
959 -- Time_Slice pragma has been processed. Set to the time slice value in
960 -- microseconds. Negative values are stored as zero, and the value is not
961 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
962 -- reset to this maximum. This can also be set with the -gnatTnn switch.
964 Tolerate_Consistency_Errors : Boolean := False;
966 -- Tolerate time stamp and other consistency errors. If this flag is set to
967 -- True (-t), then inconsistencies result in warnings rather than errors.
969 Tree_Output : Boolean := False;
971 -- Set to True (-gnatt) to generate output tree file
973 Try_Semantics : Boolean := False;
975 -- Flag set to force attempt at semantic analysis, even if parser errors
976 -- occur. This will probably cause blowups at this stage in the game. On
977 -- the other hand, most such blowups will be caught cleanly and simply
978 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
980 Undefined_Symbols_Are_False : Boolean := False;
982 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
983 -- file for the compiler. Indicates that while preprocessing sources,
984 -- symbols that are not defined have the value FALSE.
986 Unique_Error_Tag : Boolean := Tag_Errors;
988 -- Indicates if error messages are to be prefixed by the string error:
989 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
991 Universal_Addressing_On_AAMP : Boolean := False;
993 -- Indicates if library-level objects should be accessed and updated using
994 -- universal addressing instructions on the AAMP architecture. This flag is
995 -- set to True when pragma Universal_Data is given as a configuration
998 Unreserve_All_Interrupts : Boolean := False;
1000 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1001 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1002 -- corresponding attribute set in GNATBIND.
1004 Upper_Half_Encoding : Boolean := False;
1006 -- Normally set False, indicating that upper half ASCII characters are
1007 -- used in the normal way to represent themselves. If the wide character
1008 -- encoding method uses the upper bit for this encoding, then this flag is
1009 -- set True, and upper half characters in the source indicate the start of
1010 -- a wide character sequence.
1012 Usage_Requested : Boolean := False;
1013 -- GNAT, GNATBIND, GNATMAKE
1014 -- Set to True if -h (-gnath for the compiler) switch encountered
1015 -- requesting usage information
1017 Use_Pragma_Linker_Constructor : Boolean := False;
1019 -- True if pragma Linker_Constructor applies to adainit
1021 Use_VADS_Size : Boolean := False;
1023 -- Set to True if a valid pragma Use_VADS_Size is processed
1025 Validity_Checks_On : Boolean := True;
1027 -- This flag determines if validity checking is on or off. The initial
1028 -- state is on, and the required default validity checks are active. The
1029 -- actual set of checks that is performed if Validity_Checks_On is set is
1030 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1031 -- is controlled by pragma Validity_Checks (On | Off), and also some
1032 -- generated compiler code (typically code that has to do with validity
1033 -- check generation) is compiled with this flag set to False. This flag is
1034 -- set to False by the -gnatp switch.
1036 Verbose_Mode : Boolean := False;
1037 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1039 -- Set to True to get verbose mode (full error message text and location
1040 -- information sent to standard output, also header, copyright and summary)
1042 type Verbosity_Level_Type is (None, Low, Medium, High);
1043 Verbosity_Level : Verbosity_Level_Type := High;
1044 -- GNATMAKE, GPRMAKE
1045 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1046 -- the level of verbosity of informational messages:
1048 -- In Low Verbosity, the reasons why a source is recompiled, the name
1049 -- of the executable and the reason it must be rebuilt is output.
1051 -- In Medium Verbosity, additional lines are output for each ALI file
1054 -- In High Verbosity, additional lines are output when the ALI file
1055 -- is part of an Ada library, is read-only or is part of the runtime.
1057 Warn_On_Ada_2005_Compatibility : Boolean := True;
1059 -- Set to True to active all warnings on Ada 2005 compatibility issues,
1060 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1061 -- mode. Set False by -gnatwY.
1063 Warn_On_Bad_Fixed_Value : Boolean := False;
1065 -- Set to True to generate warnings for static fixed-point expression
1066 -- values that are not an exact multiple of the small value of the type.
1068 Warn_On_Constant : Boolean := False;
1070 -- Set to True to generate warnings for variables that could be declared
1071 -- as constants. Modified by use of -gnatwk/K.
1073 Warn_On_Dereference : Boolean := False;
1075 -- Set to True to generate warnings for implicit dereferences for array
1076 -- indexing and record component access. Modified by use of -gnatwd/D.
1078 Warn_On_Export_Import : Boolean := True;
1080 -- Set to True to generate warnings for suspicious use of export or
1081 -- import pragmas. Modified by use of -gnatwx/X.
1083 Warn_On_Hiding : Boolean := False;
1085 -- Set to True to generate warnings if a declared entity hides another
1086 -- entity. The default is that this warning is suppressed.
1088 Warn_On_Modified_Unread : Boolean := False;
1090 -- Set to True to generate warnings if a variable is assigned but is never
1091 -- read. The default is that this warning is suppressed.
1093 Warn_On_No_Value_Assigned : Boolean := True;
1095 -- Set to True to generate warnings if no value is ever assigned to a
1096 -- variable that is at least partially uninitialized. Set to false to
1097 -- suppress such warnings. The default is that such warnings are enabled.
1099 Warn_On_Obsolescent_Feature : Boolean := False;
1101 -- Set to True to generate warnings on use of any feature in Annex or if a
1102 -- subprogram is called for which a pragma Obsolescent applies.
1104 Warn_On_Redundant_Constructs : Boolean := False;
1106 -- Set to True to generate warnings for redundant constructs (e.g. useless
1107 -- assignments/conversions). The default is that this warning is disabled.
1109 Warn_On_Unchecked_Conversion : Boolean := True;
1111 -- Set to True to generate warnings for unchecked conversions that may have
1112 -- non-portable semantics (e.g. because sizes of types differ). The default
1113 -- is that this warning is enabled.
1115 Warn_On_Unrecognized_Pragma : Boolean := True;
1117 -- Set to True to generate warnings for unrecognized pragmas. The default
1118 -- is that this warning is enabled.
1120 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1121 Warning_Mode : Warning_Mode_Type := Normal;
1123 -- Controls treatment of warning messages. If set to Suppress, warning
1124 -- messages are not generated at all. In Normal mode, they are generated
1125 -- but do not count as errors. In Treat_As_Error mode, warning messages
1126 -- are generated and are treated as errors.
1128 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1130 -- Method used for encoding wide characters in the source program. See
1131 -- description of type in unit System.WCh_Con for a list of the methods
1132 -- that are currently supported. Note that brackets notation is always
1133 -- recognized in source programs regardless of the setting of this
1134 -- variable. The default setting causes only the brackets notation to be
1135 -- recognized. If this is the main unit, this setting also controls the
1136 -- output of the W=? parameter in the ALI file, which is used to provide
1137 -- the default for Wide_Text_IO files.
1139 Xref_Active : Boolean := True;
1141 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1143 ----------------------------
1144 -- Configuration Settings --
1145 ----------------------------
1147 -- These are settings that are used to establish the mode at the start of
1148 -- each unit. The values defined below can be affected either by command
1149 -- line switches, or by the use of appropriate configuration pragmas in the
1152 Ada_Version_Config : Ada_Version_Type;
1154 -- This is the value of the configuration switch for the Ada 83 mode, as
1155 -- set by the command line switches -gnat83/95/05, and possibly modified by
1156 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1157 -- to set the initial value for Ada_Version mode at the start of analysis
1158 -- of a unit. Note however, that the setting of this flag is ignored for
1159 -- internal and predefined units (which are always compiled in the most up
1160 -- to date version of Ada).
1162 Ada_Version_Explicit_Config : Ada_Version_Type;
1164 -- Same as above but used to initialize Ada_Version_Explicit. Currently
1165 -- this will always have the same value as Ada_Version_Config.
1167 Assertions_Enabled_Config : Boolean;
1169 -- This is the value of the configuration switch for assertions enabled
1170 -- mode, as possibly set by the command line switch -gnata, and possibly
1171 -- modified by the use of the configuration pragma Assertion_Policy.
1173 Debug_Pragmas_Enabled_Config : Boolean;
1175 -- This is the value of the configuration switch for debug pragmas enabled
1176 -- mode, as possibly set by the command line switch -gnata and possibly
1177 -- modified by the use of the configuration pragma Debug_Policy.
1179 Dynamic_Elaboration_Checks_Config : Boolean := False;
1181 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1182 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1184 Exception_Locations_Suppressed_Config : Boolean := False;
1186 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1188 Extensions_Allowed_Config : Boolean;
1190 -- This is the flag that indicates whether extensions are allowed. It can
1191 -- be set True either by use of the -gnatX switch, or by use of the
1192 -- configuration pragma Extensions_Allowed (On). It is always set to True
1193 -- for internal GNAT units, since extensions are always permitted in such
1196 External_Name_Exp_Casing_Config : External_Casing_Type;
1198 -- This is the value of the configuration switch that controls casing of
1199 -- external symbols for which an explicit external name is given. It can be
1200 -- set to Uppercase by the command line switch -gnatF, and further modified
1201 -- by the use of the configuration pragma External_Name_Casing in the
1202 -- gnat.adc file. This flag is used to set the initial value for
1203 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1204 -- however that the setting of this flag is ignored for internal and
1205 -- predefined units (which are always compiled with As_Is mode).
1207 External_Name_Imp_Casing_Config : External_Casing_Type;
1209 -- This is the value of the configuration switch that controls casing of
1210 -- external symbols where the external name is implicitly given. It can be
1211 -- set to Uppercase by the command line switch -gnatF, and further modified
1212 -- by the use of the configuration pragma External_Name_Casing in the
1213 -- gnat.adc file. This flag is used to set the initial value for
1214 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1215 -- however that the setting of this flag is ignored for internal and
1216 -- predefined units (which are always compiled with Lowercase mode).
1218 Persistent_BSS_Mode_Config : Boolean;
1220 -- This is the value of the configuration switch that controls whether
1221 -- potentially persistent data is to be placed in the persistent_bss
1222 -- section. It can be set True by use of the pragma Persistent_BSS.
1223 -- This flag is used to set the initial value of Persistent_BSS_Mode
1224 -- at the start of each compilation unit, except that it is always
1225 -- set False for predefined units.
1227 Polling_Required_Config : Boolean;
1229 -- This is the value of the configuration switch that controls polling
1230 -- mode. It can be set True by the command line switch -gnatP, and then
1231 -- further modified by the use of pragma Polling in the gnat.adc file. This
1232 -- flag is used to set the initial value for Polling_Required at the start
1233 -- of analyzing each unit.
1235 Use_VADS_Size_Config : Boolean;
1237 -- This is the value of the configuration switch that controls the use of
1238 -- VADS_Size instead of Size whereever the attribute Size is used. It can
1239 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1240 -- This flag is used to set the initial value for Use_VADS_Size at the
1241 -- start of analyzing each unit. Note however that the setting of this flag
1242 -- is ignored for internal and predefined units (which are always compiled
1243 -- with the standard Size semantics).
1245 type Config_Switches_Type is private;
1246 -- Type used to save values of the switches set from Config values
1248 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1249 -- This procedure saves the current values of the switches which are
1250 -- initialized from the above Config values, and then resets these switches
1251 -- according to the Config value settings.
1253 procedure Set_Opt_Config_Switches
1254 (Internal_Unit : Boolean;
1255 Main_Unit : Boolean);
1256 -- This procedure sets the switches to the appropriate initial values. The
1257 -- parameter Internal_Unit is True for an internal or predefined unit, and
1258 -- affects the way the switches are set (see above). Main_Unit is true if
1259 -- switches are being set for the main unit (this affects setting of the
1260 -- assert/debug pragm switches, which are normally set false by default for
1261 -- an internal unit, except when the internal unit is the main unit, in
1262 -- which case we use the command line settings).
1264 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1265 -- This procedure restores a set of switch values previously saved by a
1266 -- call to Save_Opt_Switches.
1268 procedure Register_Opt_Config_Switches;
1269 -- This procedure is called after processing the gnat.adc file to record
1270 -- the values of the Config switches, as possibly modified by the use of
1271 -- command line switches and configuration pragmas.
1273 ------------------------
1274 -- Other Global Flags --
1275 ------------------------
1277 Expander_Active : Boolean := False;
1278 -- A flag that indicates if expansion is active (True) or deactivated
1279 -- (False). When expansion is deactivated all calls to expander routines
1280 -- have no effect. Note that the initial setting of False is merely to
1281 -- prevent saving of an undefined value for an initial call to the
1282 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1283 -- this flag, see package Expander. Indeed this flag might more logically
1284 -- be in the spec of Expander, but it is referenced by Errout, and it
1285 -- really seems wrong for Errout to depend on Expander.
1287 -----------------------
1288 -- Tree I/O Routines --
1289 -----------------------
1291 procedure Tree_Read;
1292 -- Reads switch settings from current tree file using Tree_Read
1294 procedure Tree_Write;
1295 -- Writes out switch settings to current tree file using Tree_Write
1297 --------------------------
1298 -- ASIS Version Control --
1299 --------------------------
1301 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1302 -- are supposed to be used in the GNAT/ASIS version check performed in
1303 -- the ASIS code (this package is also a part of the ASIS implementation).
1304 -- They are set by Tree_Read procedure, so they represent the version
1305 -- number (and the version string) of the compiler which has created the
1306 -- tree, and they are supposed to be compared with the corresponding values
1307 -- from the Gnatvsn package which is a part of ASIS implementation.
1309 Tree_Version_String : String (Gnat_Version_String'Range);
1310 -- Used to store the compiler version string read from a tree file to check
1311 -- if it is the same as stored in the version string in Gnatvsn. Therefore
1312 -- its length is taken directly from the version string in Gnatvsn. If the
1313 -- length of the version string stored in the tree is different, then
1314 -- versions are for sure different, and a string containing '?' characters
1315 -- is assigned to this variable as a result of tree read.
1317 Tree_ASIS_Version_Number : Int;
1318 -- Used to store the ASIS version number read from a tree file to check if
1319 -- it is the same as stored in the ASIS version number in Gnatvsn.
1323 type Config_Switches_Type is record
1324 Ada_Version : Ada_Version_Type;
1325 Ada_Version_Explicit : Ada_Version_Type;
1326 Assertions_Enabled : Boolean;
1327 Debug_Pragmas_Enabled : Boolean;
1328 Dynamic_Elaboration_Checks : Boolean;
1329 Exception_Locations_Suppressed : Boolean;
1330 Extensions_Allowed : Boolean;
1331 External_Name_Exp_Casing : External_Casing_Type;
1332 External_Name_Imp_Casing : External_Casing_Type;
1333 Persistent_BSS_Mode : Boolean;
1334 Polling_Required : Boolean;
1335 Use_VADS_Size : Boolean;