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, GNATMAKE, 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 -- 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.
67 Ada_Version_Default : Ada_Version_Type := Ada_95;
69 -- Default Ada version if no switch given
71 Ada_Version : Ada_Version_Type := Ada_Version_Default;
73 -- Current Ada version for compiler, as set by configuration pragmas,
74 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
75 -- predefined or internal file is compiled.
77 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
79 -- Like Ada_Version, but does not get set implicitly for predefined
80 -- or internal units, so it reflects the Ada version explicitly set
81 -- using configuration pragmas or compiler switches (or if neither
82 -- appears, it remains set to Ada_Version_Default). This is used in
83 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
84 -- where in the run-time we want the explicit version set.
86 Ada_Version_Runtime : Ada_Version_Type := Ada_05;
88 -- Ada version used to compile the runtime. Used to set Ada_Version (but
89 -- not Ada_Version_Explicit) when compiling predefined or internal units.
91 Ada_Final_Suffix : constant String := "final";
92 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
94 -- The name of the procedure that performs the finalization at the end of
95 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
97 Ada_Init_Suffix : constant String := "init";
98 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
100 -- The name of the procedure that performs initialization at the start
101 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
103 Ada_Main_Name_Suffix : constant String := "main";
105 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
106 -- can be referenced in a uniform manner to create either the default
107 -- value of Ada_Main_Name (declared below), or the non-default name
108 -- set by Gnatbind.Scan_Bind_Arg.
110 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
112 -- The name of the Ada package generated by the binder (when in Ada mode).
113 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
115 Address_Clause_Overlay_Warnings : Boolean := True;
117 -- Set False to disable address clause warnings
119 Address_Is_Private : Boolean := False;
121 -- Set True if package System has the line "type Address is private;"
123 All_Errors_Mode : Boolean := False;
125 -- Flag set to force display of multiple errors on a single line and
126 -- also repeated error messages for references to undefined identifiers
127 -- and certain other repeated error messages.
129 All_Sources : Boolean := False;
131 -- Set to True to require all source files to be present. This flag is
132 -- directly modified by gnatmake to affect the shared binder routines.
134 Alternate_Main_Name : String_Ptr := null;
136 -- Set to non null when Bind_Alternate_Main_Name is True. This value
137 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
139 Assertions_Enabled : Boolean := False;
141 -- Enable assertions made using pragma Assert
143 ASIS_Mode : Boolean := False;
145 -- Enable semantic checks and tree transformations that are important
146 -- for ASIS but that are usually skipped if Operating_Mode is set to
147 -- Check_Semantics. This flag does not have the corresponding option to set
148 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
149 -- from the code of GNSA-based tool (a client may need to set ON the
150 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
151 -- make very much sense, because GNSA can not do back annotation).
153 Back_Annotate_Rep_Info : Boolean := False;
155 -- If set True, enables back annotation of representation information
156 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
157 -- (list representation information) or -gnatt (generate tree). It is
158 -- also set true if certain Unchecked_Conversion instantiations require
159 -- checking based on annotated values.
161 Bind_Alternate_Main_Name : Boolean := False;
163 -- True if main should be called Alternate_Main_Name.all.
164 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
166 Bind_Main_Program : Boolean := True;
168 -- Set to False if not binding main Ada program
170 Bind_For_Library : Boolean := False;
172 -- Set to True if the binder needs to generate a file designed for
173 -- building a library. May be set to True by Gnatbind.Scan_Bind_Arg.
175 Bind_Only : Boolean := False;
177 -- Set to True to skip compile and link steps
178 -- (except when Compile_Only and/or Link_Only are True).
180 Blank_Deleted_Lines : Boolean := False;
182 -- Output empty lines for each line of preprocessed input that is deleted
183 -- in the output, including preprocessor lines starting with a '#'.
185 Brief_Output : Boolean := False;
187 -- Force brief error messages to standard error, even if verbose mode is
188 -- set (so that main error messages go to standard output).
190 Build_Bind_And_Link_Full_Project : Boolean := False;
192 -- Set to True to build, bind and link all the sources of a project file
195 Check_Object_Consistency : Boolean := False;
196 -- GNATBIND, GNATMAKE
197 -- Set to True to check whether every object file is consistent with
198 -- its corresponding ada library information (ALI) file. An object
199 -- file is inconsistent with the corresponding ALI file if the object
200 -- file does not exist or if it has an older time stamp than the ALI file.
201 -- Default above is for GNATBIND. GNATMAKE overrides this default to
202 -- True (see Make.Initialize) since we normally do need to check source
203 -- consistencies in gnatmake.
205 Check_Only : Boolean := False;
207 -- Set to True to do checks only, no output of binder file
209 Check_Readonly_Files : Boolean := False;
211 -- Set to True to check readonly files during the make process
213 Check_Source_Files : Boolean := True;
214 -- GNATBIND, GNATMAKE
215 -- Set to True to enable consistency checking for any source files that
216 -- are present (i.e. date must match the date in the library info file).
217 -- Set to False for object file consistency check only. This flag is
218 -- directly modified by gnatmake, to affect the shared binder routines.
220 Check_Switches : Boolean := False;
222 -- Set to True to check compiler options during the make process
224 Check_Unreferenced : Boolean := False;
226 -- Set to True to enable checking for unreferenced entities other
227 -- than formal parameters (for which see Check_Unreferenced_Formals)
229 Check_Unreferenced_Formals : Boolean := False;
231 -- Set True to check for unreferenced formals. This is turned on by
232 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
234 Check_Withs : Boolean := False;
236 -- Set to True to enable checking for unused withs, and also the case
237 -- of withing a package and using none of the entities in the package.
239 Comment_Deleted_Lines : Boolean := False;
241 -- True if source lines removed by the preprocessor should be commented
242 -- in the output file.
244 Compile_Only : Boolean := False;
245 -- GNATMAKE, GNATCLEAN
246 -- GNATMAKE: set to True to skip bind and link steps (except when
247 -- Bind_Only is True).
248 -- GNATCLEAN: set to True to only the files produced by the compiler are to
249 -- be deleted, but not the library files or executable files.
251 Config_File : Boolean := True;
253 -- Set to False to inhibit reading and processing of gnat.adc file
255 Config_File_Names : String_List_Access := null;
257 -- Names of configuration pragmas files (given by switches -gnatec)
259 Configurable_Run_Time_Mode : Boolean := False;
261 -- Set True if the compiler is operating in configurable run-time mode.
262 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
263 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
264 -- for details on the handling of the latter pragma.
266 Constant_Condition_Warnings : Boolean := False;
268 -- Set to True to activate warnings on constant conditions
270 Create_Mapping_File : Boolean := False;
272 -- Set to True (-C switch) to indicate that gnatmake will invoke
273 -- the compiler with a mapping file (-gnatem compiler switch).
275 Debug_Pragmas_Enabled : Boolean := False;
277 -- Enable debug statements from pragma Debug
279 subtype Debug_Level_Value is Nat range 0 .. 3;
280 Debugger_Level : Debug_Level_Value := 0;
282 -- The value given to the -g parameter. The default value for -g with
283 -- no value is 2. This is usually ignored by GNATBIND, except in the
284 -- VMS version where it is passed as an argument to __gnat_initialize
285 -- to trigger the activation of the remote debugging interface.
286 -- Is this still true ???
288 Debug_Generated_Code : Boolean := False;
290 -- Set True (-gnatD switch) to debug generated expanded code instead
291 -- of the original source code. Causes debugging information to be
292 -- written with respect to the generated code file that is written.
294 Default_Exit_Status : Int := 0;
296 -- Set the default exit status value. Set by the -Xnnn switch for the
299 Default_Sec_Stack_Size : Int := -1;
301 -- Set to default secondary stack size in units of kilobytes. Set by
302 -- the -Dnnn switch for the binder. A value of -1 indicates that no
303 -- default was set by the binder, and that the default should be the
304 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
306 Detect_Blocking : Boolean := False;
308 -- Set True to force the run time to raise Program_Error if calls to
309 -- potentially blocking operations are detected from protected actions.
311 Display_Compilation_Progress : Boolean := False;
313 -- Set True (-d switch) to display information on progress while compiling
314 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
316 type Distribution_Stub_Mode_Type is
319 -- Normal mode, no generation/compilation of distribution stubs
321 Generate_Receiver_Stub_Body,
322 -- The unit being compiled is the RCI body, and the compiler will
323 -- generate the body for the receiver stubs and compile it.
325 Generate_Caller_Stub_Body);
326 -- The unit being compiled is the RCI spec, and the compiler will
327 -- generate the body for the caller stubs and compile it.
329 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
331 -- This enumeration variable indicates the five states of distribution
332 -- annex stub generation/compilation.
334 Do_Not_Execute : Boolean := False;
336 -- Set to True if no actual compilations should be undertaken.
338 Dynamic_Elaboration_Checks : Boolean := False;
340 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
341 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
343 Elab_Dependency_Output : Boolean := False;
345 -- Set to True to output complete list of elaboration constraints
347 Elab_Order_Output : Boolean := False;
349 -- Set to True to output chosen elaboration order
351 Elab_Warnings : Boolean := False;
353 -- Set to True to generate full elaboration warnings (-gnatwl)
355 Enable_Overflow_Checks : Boolean := False;
357 -- Set to True if -gnato (enable overflow checks) switch is set,
360 Exception_Locations_Suppressed : Boolean := False;
362 -- This flag is set True if a Suppress_Exception_Locations configuration
363 -- pragma is currently active.
365 type Exception_Mechanism_Type is
366 -- Determines the handling of exceptions. See Exp_Ch11 for details
368 (Front_End_Setjmp_Longjmp_Exceptions,
369 -- Exceptions use setjmp/longjmp generated explicitly by the
370 -- front end (this includes gigi or other equivalent parts of
371 -- the code generator). AT END handlers are converted into
372 -- exception handlers by the front end in this mode.
374 Back_End_Exceptions);
375 -- Exceptions are handled by the back end. The front end simply
376 -- generates the handlers as they appear in the source, and AT
377 -- END handlers are left untouched (they are not converted into
378 -- exception handlers when operating in this mode.
379 pragma Convention (C, Exception_Mechanism_Type);
381 Exception_Mechanism : Exception_Mechanism_Type :=
382 Front_End_Setjmp_Longjmp_Exceptions;
384 -- Set to the appropriate value depending on the default as given in
385 -- system.ads (ZCX_By_Default, GCC_ZCX_Support).
386 -- The C convention is there to make this variable accessible to gigi.
388 Exception_Tracebacks : Boolean := False;
390 -- Set to True to store tracebacks in exception occurrences (-E)
392 Extensions_Allowed : Boolean := False;
394 -- Set to True by switch -gnatX if GNAT specific language extensions
395 -- are allowed. For example, "limited with" is a GNAT extension.
397 type External_Casing_Type is (
398 As_Is, -- External names cased as they appear in the Ada source
399 Uppercase, -- External names forced to all uppercase letters
400 Lowercase); -- External names forced to all lowercase letters
402 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
404 -- The setting of this flag determines the casing of external names
405 -- when the name is implicitly derived from an entity name (i.e. either
406 -- no explicit External_Name or Link_Name argument is used, or, in the
407 -- case of extended DEC pragmas, the external name is given using an
408 -- identifier. The As_Is setting is not permitted here (since this would
409 -- create Ada source programs that were case sensitive).
411 External_Name_Exp_Casing : External_Casing_Type := As_Is;
413 -- The setting of this flag determines the casing of an external name
414 -- specified explicitly with a string literal. As_Is means the string
415 -- literal is used as given with no modification to the casing. If
416 -- Lowercase or Uppercase is set, then the string is forced to all
417 -- lowercase or all uppercase letters as appropriate. Note that this
418 -- setting has no effect if the external name is given using an identifier
419 -- in the case of extended DEC import/export pragmas (in this case the
420 -- casing is controlled by External_Name_Imp_Casing), and also has no
421 -- effect if an explicit Link_Name is supplied (a link name is always
422 -- used exactly as given).
424 External_Unit_Compilation_Allowed : Boolean := False;
426 -- When True (set by gnatmake switch -x), allow compilation of sources
427 -- that are not part of any project file.
429 Float_Format : Character := ' ';
431 -- A non-blank value indicates that a Float_Format pragma has been
432 -- processed, in which case this variable is set to 'I' for IEEE or
433 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
436 Float_Format_Long : Character := ' ';
438 -- A non-blank value indicates that a Long_Float pragma has been
439 -- processed (this pragma is recognized only in OpenVMS versions
440 -- of GNAT), in which case this variable is set to D or G for
441 -- D_Float or G_Float.
443 Force_ALI_Tree_File : Boolean := False;
445 -- Force generation of ALI file even if errors are encountered.
446 -- Also forces generation of tree file if -gnatt is also set.
448 Force_Checking_Of_Elaboration_Flags : Boolean := False;
450 -- True if binding with forced checking of the elaboration flags
453 Force_Compilations : Boolean := False;
455 -- Set to force recompilations even when the objects are up-to-date.
457 Full_Path_Name_For_Brief_Errors : Boolean := False;
458 -- GNAT, GNATMAKE, GNATCLEAN
459 -- When True, in Brief_Output mode, each error message line
460 -- will start with the full path name of the source.
461 -- When False, only the file name without directory information
464 Full_List : Boolean := False;
466 -- Set True to generate full source listing with embedded errors
468 function get_gcc_version return Int;
469 pragma Import (C, get_gcc_version, "get_gcc_version");
471 GCC_Version : constant Nat := get_gcc_version;
473 -- Indicates which version of gcc is in use (2 = 2.8.1, 3 = 3.x)
475 Global_Discard_Names : Boolean := False;
477 -- Set true if a pragma Discard_Names applies to the current unit
479 GNAT_Mode : Boolean := False;
481 -- True if compiling in GNAT system mode (-gnatg switch)
483 HLO_Active : Boolean := False;
485 -- True if High Level Optimizer is activated (-gnatH switch)
487 Implementation_Unit_Warnings : Boolean := True;
489 -- Set True to active warnings for use of implementation internal units.
490 -- Can be controlled by use of -gnatwi/-gnatwI.
492 Identifier_Character_Set : Character;
494 -- This variable indicates the character set to be used for identifiers.
495 -- The possible settings are:
496 -- '1' Latin-5 (ISO-8859-1)
497 -- '2' Latin-5 (ISO-8859-2)
498 -- '3' Latin-5 (ISO-8859-3)
499 -- '4' Latin-5 (ISO-8859-4)
500 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
501 -- '9' Latin-5 (ISO-8859-9)
502 -- 'p' PC (US, IBM page 437)
503 -- '8' PC (European, IBM page 850)
504 -- 'f' Full upper set (all distinct)
505 -- 'n' No upper characters (Ada 83 rules)
506 -- 'w' Latin-1 plus wide characters allowed in identifiers
508 -- The setting affects the set of letters allowed in identifiers and the
509 -- upper/lower case equivalences. It does not affect the interpretation of
510 -- character and string literals, which are always stored using the actual
511 -- coding in the source program. This variable is initialized to the
512 -- default value appropriate to the system (in Osint.Initialize), and then
513 -- reset if a command line switch is used to change the setting.
515 Ineffective_Inline_Warnings : Boolean := False;
517 -- Set True to activate warnings if front-end inlining (-gnatN) is not
518 -- able to actually inline a particular call (or all calls). Can be
519 -- controlled by use of -gnatwp/-gnatwP.
521 Init_Or_Norm_Scalars : Boolean := False;
523 -- Set True if a pragma Initialize_Scalars applies to the current unit.
524 -- Also set True if a pragma Normalize_Scalars applies.
526 Initialize_Scalars : Boolean := False;
528 -- Set True if a pragma Initialize_Scalars applies to the current unit.
529 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
531 Initialize_Scalars_Mode1 : Character := 'I';
532 Initialize_Scalars_Mode2 : Character := 'N';
534 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
535 -- is IN (invalid values), used if no -S switch is used.
537 Inline_Active : Boolean := False;
539 -- Set True to activate pragma Inline processing across modules. Default
540 -- for now is not to inline across module boundaries.
542 Interface_Library_Unit : Boolean := False;
544 -- Set to True to indicate that at least one ALI file is an interface ALI:
545 -- then elaboration flag checks are to be generated in the binder
548 Follow_Links : Boolean := False;
550 -- Set to True (-eL) to process the project files in trusted mode
552 Front_End_Inlining : Boolean := False;
554 -- Set True to activate inlining by front-end expansion
556 Inline_Processing_Required : Boolean := False;
558 -- Set True if inline processing is required. Inline processing is
559 -- required if an active Inline pragma is processed. The flag is set
560 -- for a pragma Inline or Inline_Always that is actually active.
562 In_Place_Mode : Boolean := False;
564 -- Set True to store ALI and object files in place ie in the object
565 -- directory if these files already exist or in the source directory
568 Keep_Going : Boolean := False;
570 -- When True signals gnatmake to ignore compilation errors and keep
571 -- processing sources until there is no more work.
573 Keep_Temporary_Files : Boolean := False;
575 -- When True the temporary files created by the GNAT driver are not
576 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
578 Link_Only : Boolean := False;
580 -- Set to True to skip compile and bind steps
581 -- (except when Bind_Only is set to True).
583 List_Restrictions : Boolean := False;
585 -- Set to True to list restrictions pragmas that could apply to partition
587 List_Units : Boolean := False;
589 -- List units in the active library for a compilation (-gnatu switch)
591 List_Dependencies : Boolean := False;
593 -- When True gnatmake verifies that the objects are up to date and
594 -- outputs the list of object dependencies (-M switch).
595 -- Output depends if -a switch is used or not.
596 -- This list can be used directly in a Makefile.
598 List_Representation_Info : Int range 0 .. 3 := 0;
600 -- Set non-zero by -gnatR switch to list representation information.
601 -- The settings are as follows:
603 -- 0 = no listing of representation information (default as above)
604 -- 1 = list rep info for user defined record and array types
605 -- 2 = list rep info for all user defined types and objects
606 -- 3 = like 2, but variable fields are decoded symbolically
608 List_Representation_Info_To_File : Boolean := False;
610 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3
611 -- to be written to file.rep (where file is the name of the source
612 -- file) instead of stdout. For example, if file x.adb is compiled
613 -- using -gnatR2s then representation info is written to x.adb.ref.
615 List_Representation_Info_Mechanisms : Boolean := False;
617 -- Set true by -gnatRm switch. Causes information on mechanisms to
618 -- be included in the representation output information.
620 List_Preprocessing_Symbols : Boolean := False;
622 -- Set to True if symbols for preprocessing a source are to be listed
623 -- before preprocessing occurs. Set to True by switch -s of gnatprep
624 -- or -s in preprocessing data file for the compiler.
626 type Creat_Repinfo_File_Proc is access procedure (Src : File_Name_Type);
627 type Write_Repinfo_Line_Proc is access procedure (Info : String);
628 type Close_Repinfo_File_Proc is access procedure;
629 -- Types used for procedure addresses below
631 Creat_Repinfo_File_Access : Creat_Repinfo_File_Proc := null;
632 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
633 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
635 -- These three locations are left null when operating in non-compiler
636 -- (e.g. ASIS mode), but when operating in compiler mode, they are
637 -- set to point to the three corresponding procedures in Osint. The
638 -- reason for this slightly strange interface is to prevent Repinfo
639 -- from dragging in Osint in ASIS mode, which would include a lot of
640 -- unwanted units in the ASIS build.
642 Locking_Policy : Character := ' ';
644 -- Set to ' ' for the default case (no locking policy specified).
645 -- Reset to first character (uppercase) of locking policy name if a
646 -- valid pragma Locking_Policy is encountered.
648 Locking_Policy_Sloc : Source_Ptr := No_Location;
650 -- Remember location of previous Locking_Policy pragma. This is used
651 -- for inconsistency error messages. A value of System_Location is
652 -- used if the policy is set in package System.
654 Look_In_Primary_Dir : Boolean := True;
655 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
656 -- Set to False if a -I- was present on the command line.
657 -- When True we are allowed to look in the primary directory to locate
658 -- other source or library files.
660 Make_Steps : Boolean := False;
662 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
665 Main_Index : Int := 0;
667 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
668 -- the main program is the nnn unit in a multi-unit source file.
670 Mapping_File_Name : String_Ptr := null;
672 -- File name of mapping between unit names, file names and path names.
673 -- (given by switch -gnatem)
675 Maximum_Errors : Int := 9999;
677 -- Maximum default number of errors before compilation is terminated.
678 -- Can be overridden using -gnatm (GNAT) or -m (GNATBIND) switch.
680 Maximum_File_Name_Length : Int;
682 -- Maximum number of characters allowed in a file name, not counting the
683 -- extension, as set by the appropriate switch. If no switch is given,
684 -- then this value is initialized by Osint to the appropriate value.
686 Max_Line_Length : Int := Hostparm.Max_Line_Length;
687 -- This is a copy of Max_Line_Length used by the scanner. It is usually
688 -- set to be a copy of Hostparm.Max_Line_Length, and is used to check
689 -- the maximum line length in the scanner when style checking is inactive.
690 -- The only time it is set to a different value is during the scanning of
691 -- configuration pragma files, where we want to turn off all checking and
692 -- in particular we want to allow long lines. So we reset this value to
693 -- Column_Number'Last during scanning of configuration pragma files.
695 Maximum_Processes : Positive := 1;
697 -- Maximum number of processes that should be spawned to carry out
700 Minimal_Recompilation : Boolean := False;
702 -- Set to True if minimal recompilation mode requested
704 Multiple_Unit_Index : Int;
706 -- This is set non-zero if the current unit is being compiled in multiple
707 -- unit per file mode, meaning that the current unit is selected from the
708 -- sequence of units in the current source file, using the value stored
709 -- in this variable (e.g. 2 = select second unit in file). A value of
710 -- zero indicates that we are in normal (one unit per file) mode.
712 No_Main_Subprogram : Boolean := False;
713 -- GNATMAKE, GNATBIND
714 -- Set to True if compilation/binding of a program without main
715 -- subprogram requested.
717 No_Run_Time_Mode : Boolean := False;
719 -- This flag is set True if a No_Run_Time pragma is encountered. See
720 -- spec of Rtsfind for a full description of handling of this pragma.
722 No_Stdinc : Boolean := False;
723 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
724 -- Set to True if no default source search dirs added to search list
726 No_Stdlib : Boolean := False;
727 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
728 -- Set to True if no default library search dirs added to search list
730 No_Strict_Aliasing : Boolean := False;
732 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
734 Normalize_Scalars : Boolean := False;
736 -- Set True if a pragma Normalize_Scalars applies to the current unit.
737 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
739 Object_Directory_Present : Boolean := False;
741 -- Set to True when an object directory is specified with option -D
743 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
744 Operating_Mode : Operating_Mode_Type := Generate_Code;
746 -- Indicates the operating mode of the compiler. The default is generate
747 -- code, which runs the parser, semantics and backend. Switches can be
748 -- used to set syntax checking only mode, or syntax and semantics checking
749 -- only mode. Operating_Mode can also be modified as a result of detecting
750 -- errors during the compilation process. In particular if any serious
751 -- error is detected then this flag is reset from Generate_Code to
752 -- Check_Semantics after generating an error message.
754 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
756 -- Indicates the original operating mode of the compiler as set by
757 -- compiler options. This is identical to Operating_Mode except that
758 -- this is not affected by errors.
760 Optimization_Level : Int;
761 pragma Import (C, Optimization_Level, "optimize");
762 -- This constant reflects the optimization level (0,1,2 for -O0,-O1,-O2)
764 Output_File_Name_Present : Boolean := False;
765 -- GNATBIND, GNAT, GNATMAKE
766 -- Set to True when the output C file name is given with option -o
767 -- for GNATBIND, when the object file name is given with option
768 -- -gnatO for GNAT or when the executable is given with option -o
771 Output_Linker_Option_List : Boolean := False;
773 -- True if output of list of linker options is requested (-K switch set)
775 Output_Object_List : Boolean := False;
777 -- True if output of list of objects is requested (-O switch set)
779 Persistent_BSS_Mode : Boolean := False;
781 -- True if a Persistent_BSS configuration pragma is in effect, causing
782 -- potentially persistent data to be placed in the persistent_bss section.
784 Pessimistic_Elab_Order : Boolean := False;
786 -- True if pessimistic elaboration order is to be chosen (-p switch set)
788 Polling_Required : Boolean := False;
790 -- Set to True if polling for asynchronous abort is enabled by using
791 -- the -gnatP option for GNAT.
793 Preprocessing_Data_File : String_Ptr := null;
795 -- Set by switch -gnatep=. The file name of the prepocessing data file.
797 Print_Generated_Code : Boolean := False;
799 -- Set to True to enable output of generated code in source form. This
800 -- flag is set by the -gnatG switch.
802 Print_Standard : Boolean := False;
804 -- Set to true to enable printing of package standard in source form.
805 -- This flag is set by the -gnatS switch
807 Propagate_Exceptions : Boolean := False;
809 -- Indicates if subprogram descriptor exception tables should be
810 -- built for imported subprograms. Set True if a Propagate_Exceptions
811 -- pragma applies to the extended main unit.
813 type Usage is (Unknown, Not_In_Use, In_Use);
814 Project_File_In_Use : Usage := Unknown;
816 -- Indicates if a project file is used or not.
817 -- Set to In_Use by the first SFNP pragma.
819 Queuing_Policy : Character := ' ';
821 -- Set to ' ' for the default case (no queuing policy specified).
822 -- Reset to first character (uppercase) of locking policy name if a valid
823 -- Queuing_Policy pragma is encountered.
825 Queuing_Policy_Sloc : Source_Ptr := No_Location;
827 -- Remember location of previous Queuing_Policy pragma. This is used
828 -- for inconsistency error messages. A value of System_Location is
829 -- used if the policy is set in package System.
831 Quiet_Output : Boolean := False;
832 -- GNATMAKE, GNATCLEAN, GPR2MAKE
833 -- Set to True if the tool should not have any output if there are no
834 -- errors or warnings.
836 RTS_Lib_Path_Name : String_Ptr := null;
837 RTS_Src_Path_Name : String_Ptr := null;
839 -- Set to the "adalib" and "adainclude" directories of the run time
840 -- specified by --RTS=.
842 RTS_Switch : Boolean := False;
843 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
844 -- Set to True when the --RTS switch is set
846 Run_Path_Option : Boolean := True;
847 -- GNATMAKE, GNATLINK
848 -- Set to False when no run_path_option should be issued to the linker
850 Sec_Stack_Used : Boolean := False;
852 -- Set True if generated code uses the System.Secondary_Stack package.
853 -- For the binder, set if any unit uses the secondary stack package.
855 Setup_Projects : Boolean := False;
857 -- Set to True for GNAT SETUP: the Project Manager creates non existing
858 -- object, library and exec directories.
860 Shared_Libgnat : Boolean;
862 -- Set to True if a shared libgnat is requested by using the -shared
863 -- option for GNATBIND and to False when using the -static option. The
864 -- value of this flag is set by Gnatbind.Scan_Bind_Arg.
866 Stack_Checking_Enabled : Boolean;
868 -- Set to indicate if -fstack-check switch is set for the compilation. True
869 -- means that the switch is set, so that stack checking is enabled. False
870 -- means that the switch is not set (no stack checking). This value is
871 -- obtained from the external imported value flag_stack_check in the gcc
872 -- backend (see Frontend) and may be referenced throughout the compilation
875 Style_Check : Boolean := False;
877 -- Set True to perform style checks. Activates checks carried out
878 -- in package Style (see body of this package for details of checks)
879 -- This flag is set True by either the -gnatg or -gnaty switches.
881 System_Extend_Pragma_Arg : Node_Id := Empty;
883 -- Set non-empty if and only if a correct Extend_System pragma was present
884 -- in which case it points to the argument of the pragma, and the name can
885 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
887 System_Extend_Unit : Node_Id := Empty;
889 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
890 -- is never appropriate in GNAT_Mode (and causes troubles, including
891 -- bogus circularities, if we try to compile the run-time library with
892 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
893 -- is a copy of the value set in System_Extend_Pragma_Arg.
895 Subunits_Missing : Boolean := False;
897 -- This flag is set true if missing subunits are detected with code
898 -- generation active. This causes code generation to be skipped.
900 Suppress_Checks : Boolean := False;
902 -- Set to True if -gnatp (suppress all checks) switch present.
904 Suppress_Options : Suppress_Array;
906 -- Flags set True to suppress corresponding check, i.e. add an implicit
907 -- pragma Suppress at the outer level of each unit compiled. Note that
908 -- these suppress actions can be overridden by the use of the Unsuppress
909 -- pragma. This variable is initialized by Osint.Initialize.
911 Suppress_Back_Annotation : Boolean := False;
913 -- This flag is set True if back annotation of representation information
914 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
915 -- This avoids unnecessary time being spent on back annotation.
917 Table_Factor : Int := 1;
919 -- Factor by which all initial table sizes set in Alloc are multiplied.
920 -- Used in Table to calculate initial table sizes (the initial table size
921 -- is the value in Alloc, used as the Table_Initial parameter value,
922 -- multiplied by the factor given here. The default value is used if no
923 -- -gnatT switch appears.
925 Task_Dispatching_Policy : Character := ' ';
927 -- Set to ' ' for the default case (no task dispatching policy specified).
928 -- Reset to first character (uppercase) of task dispatching policy name
929 -- if a valid Task_Dispatching_Policy pragma is encountered.
931 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
933 -- Remember location of previous Task_Dispatching_Policy pragma. This is
934 -- used for inconsistency error messages. A value of System_Location is
935 -- used if the policy is set in package System.
937 Tasking_Used : Boolean := False;
938 -- Set True if any tasking construct is encountered. Used to activate the
939 -- output of the Q, L and T lines in ALI files.
941 Time_Slice_Set : Boolean := False;
943 -- Set True if a pragma Time_Slice is processed in the main unit, or
944 -- if the -gnatTnn switch is present to set a time slice value.
946 Time_Slice_Value : Nat;
948 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
949 -- Time_Slice pragma has been processed. Set to the time slice value in
950 -- microseconds. Negative values are stored as zero, and the value is not
951 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
952 -- reset to this maximum. This can also be set with the -gnatTnn switch.
954 Tolerate_Consistency_Errors : Boolean := False;
956 -- Tolerate time stamp and other consistency errors. If this flag is set to
957 -- True (-t), then inconsistencies result in warnings rather than errors.
959 Tree_Output : Boolean := False;
961 -- Set to True (-gnatt) to generate output tree file
963 Try_Semantics : Boolean := False;
965 -- Flag set to force attempt at semantic analysis, even if parser errors
966 -- occur. This will probably cause blowups at this stage in the game. On
967 -- the other hand, most such blowups will be caught cleanly and simply
968 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
970 Undefined_Symbols_Are_False : Boolean := False;
972 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
973 -- file for the compiler. Indicates that while preprocessing sources,
974 -- symbols that are not defined have the value FALSE.
976 Unique_Error_Tag : Boolean := Tag_Errors;
978 -- Indicates if error messages are to be prefixed by the string error:
979 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
981 Universal_Addressing_On_AAMP : Boolean := False;
983 -- Indicates if library-level objects should be accessed and updated using
984 -- universal addressing instructions on the AAMP architecture. This flag is
985 -- set to True when pragma Universal_Data is given as a configuration
988 Unreserve_All_Interrupts : Boolean := False;
990 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
991 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
992 -- corresponding attribute set in GNATBIND.
994 Upper_Half_Encoding : Boolean := False;
996 -- Normally set False, indicating that upper half ASCII characters are
997 -- used in the normal way to represent themselves. If the wide character
998 -- encoding method uses the upper bit for this encoding, then this flag is
999 -- set True, and upper half characters in the source indicate the start of
1000 -- a wide character sequence.
1002 Usage_Requested : Boolean := False;
1003 -- GNAT, GNATBIND, GNATMAKE
1004 -- Set to True if -h (-gnath for the compiler) switch encountered
1005 -- requesting usage information
1007 Use_Pragma_Linker_Constructor : Boolean := False;
1009 -- True if pragma Linker_Constructor applies to adainit
1011 Use_VADS_Size : Boolean := False;
1013 -- Set to True if a valid pragma Use_VADS_Size is processed
1015 Validity_Checks_On : Boolean := True;
1017 -- This flag determines if validity checking is on or off. The initial
1018 -- state is on, and the required default validity checks are active. The
1019 -- actual set of checks that is performed if Validity_Checks_On is set is
1020 -- defined by the switches in package Sem_Val. The Validity_Checks_On flag
1021 -- is controlled by pragma Validity_Checks (On | Off), and also some
1022 -- generated compiler code (typically code that has to do with validity
1023 -- check generation) is compiled with this flag set to False. This flag is
1024 -- set to False by the -gnatp switch.
1026 Verbose_Mode : Boolean := False;
1027 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN
1028 -- Set to True to get verbose mode (full error message text and location
1029 -- information sent to standard output, also header, copyright and summary)
1031 Warn_On_Ada_2005_Compatibility : Boolean := True;
1033 -- Set to True to active all warnings on Ada 2005 compatibility issues,
1034 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1035 -- mode. Set False by -gnatwY.
1037 Warn_On_Bad_Fixed_Value : Boolean := False;
1039 -- Set to True to generate warnings for static fixed-point expression
1040 -- values that are not an exact multiple of the small value of the type.
1042 Warn_On_Constant : Boolean := False;
1044 -- Set to True to generate warnings for variables that could be declared
1045 -- as constants. Modified by use of -gnatwk/K.
1047 Warn_On_Dereference : Boolean := False;
1049 -- Set to True to generate warnings for implicit dereferences for array
1050 -- indexing and record component access. Modified by use of -gnatwd/D.
1052 Warn_On_Export_Import : Boolean := True;
1054 -- Set to True to generate warnings for suspicious use of export or
1055 -- import pragmas. Modified by use of -gnatwx/X.
1057 Warn_On_Hiding : Boolean := False;
1059 -- Set to True to generate warnings if a declared entity hides another
1060 -- entity. The default is that this warning is suppressed.
1062 Warn_On_Modified_Unread : Boolean := False;
1064 -- Set to True to generate warnings if a variable is assigned but is never
1065 -- read. The default is that this warning is suppressed.
1067 Warn_On_No_Value_Assigned : Boolean := True;
1069 -- Set to True to generate warnings if no value is ever assigned to a
1070 -- variable that is at least partially uninitialized. Set to false to
1071 -- suppress such warnings. The default is that such warnings are enabled.
1073 Warn_On_Obsolescent_Feature : Boolean := False;
1075 -- Set to True to generate warnings on use of any feature in Annex or if a
1076 -- subprogram is called for which a pragma Obsolescent applies.
1078 Warn_On_Redundant_Constructs : Boolean := False;
1080 -- Set to True to generate warnings for redundant constructs (e.g. useless
1081 -- assignments/conversions). The default is that this warning is disabled.
1083 Warn_On_Unchecked_Conversion : Boolean := True;
1085 -- Set to True to generate warnings for unchecked conversions that may have
1086 -- non-portable semantics (e.g. because sizes of types differ). The default
1087 -- is that this warning is enabled.
1089 Warn_On_Unrecognized_Pragma : Boolean := True;
1091 -- Set to True to generate warnings for unrecognized pragmas. The default
1092 -- is that this warning is enabled.
1094 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1095 Warning_Mode : Warning_Mode_Type := Normal;
1097 -- Controls treatment of warning messages. If set to Suppress, warning
1098 -- messages are not generated at all. In Normal mode, they are generated
1099 -- but do not count as errors. In Treat_As_Error mode, warning messages
1100 -- are generated and are treated as errors.
1102 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1104 -- Method used for encoding wide characters in the source program. See
1105 -- description of type in unit System.WCh_Con for a list of the methods
1106 -- that are currently supported. Note that brackets notation is always
1107 -- recognized in source programs regardless of the setting of this
1108 -- variable. The default setting causes only the brackets notation to be
1109 -- recognized. If this is the main unit, this setting also controls the
1110 -- output of the W=? parameter in the ALI file, which is used to provide
1111 -- the default for Wide_Text_IO files.
1113 Xref_Active : Boolean := True;
1115 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1117 ----------------------------
1118 -- Configuration Settings --
1119 ----------------------------
1121 -- These are settings that are used to establish the mode at the start of
1122 -- each unit. The values defined below can be affected either by command
1123 -- line switches, or by the use of appropriate configuration pragmas in the
1126 Ada_Version_Config : Ada_Version_Type;
1128 -- This is the value of the configuration switch for the Ada 83 mode, as
1129 -- set by the command line switches -gnat83/95/05, and possibly modified by
1130 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1131 -- to set the initial value for Ada_Version mode at the start of analysis
1132 -- of a unit. Note however, that the setting of this flag is ignored for
1133 -- internal and predefined units (which are always compiled in the most up
1134 -- to date version of Ada).
1136 Ada_Version_Explicit_Config : Ada_Version_Type;
1138 -- Same as above but used to initialize Ada_Version_Explicit. Currently
1139 -- this will always have the same value as Ada_Version_Config.
1141 Assertions_Enabled_Config : Boolean;
1143 -- This is the value of the configuration switch for assertions enabled
1144 -- mode, as possibly set by the command line switch -gnata, and possibly
1145 -- modified by the use of the configuration pragma Assertion_Policy.
1147 Debug_Pragmas_Enabled_Config : Boolean;
1149 -- This is the value of the configuration switch for debug pragmas enabled
1150 -- mode, as possibly set by the command line switch -gnata and possibly
1151 -- modified by the use of the configuration pragma Debug_Policy.
1153 Dynamic_Elaboration_Checks_Config : Boolean := False;
1155 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1156 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1158 Exception_Locations_Suppressed_Config : Boolean := False;
1160 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1162 Extensions_Allowed_Config : Boolean;
1164 -- This is the flag that indicates whether extensions are allowed. It can
1165 -- be set True either by use of the -gnatX switch, or by use of the
1166 -- configuration pragma Extensions_Allowed (On). It is always set to True
1167 -- for internal GNAT units, since extensions are always permitted in such
1170 External_Name_Exp_Casing_Config : External_Casing_Type;
1172 -- This is the value of the configuration switch that controls casing of
1173 -- external symbols for which an explicit external name is given. It can be
1174 -- set to Uppercase by the command line switch -gnatF, and further modified
1175 -- by the use of the configuration pragma External_Name_Casing in the
1176 -- gnat.adc file. This flag is used to set the initial value for
1177 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1178 -- however that the setting of this flag is ignored for internal and
1179 -- predefined units (which are always compiled with As_Is mode).
1181 External_Name_Imp_Casing_Config : External_Casing_Type;
1183 -- This is the value of the configuration switch that controls casing of
1184 -- external symbols where the external name is implicitly given. It can be
1185 -- set to Uppercase by the command line switch -gnatF, and further modified
1186 -- by the use of the configuration pragma External_Name_Casing in the
1187 -- gnat.adc file. This flag is used to set the initial value for
1188 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1189 -- however that the setting of this flag is ignored for internal and
1190 -- predefined units (which are always compiled with Lowercase mode).
1192 Persistent_BSS_Mode_Config : Boolean;
1194 -- This is the value of the configuration switch that controls whether
1195 -- potentially persistent data is to be placed in the persistent_bss
1196 -- section. It can be set True by use of the pragma Persistent_BSS.
1197 -- This flag is used to set the initial value of Persistent_BSS_Mode
1198 -- at the start of each compilation unit, except that it is always
1199 -- set False for predefined units.
1201 Polling_Required_Config : Boolean;
1203 -- This is the value of the configuration switch that controls polling
1204 -- mode. It can be set True by the command line switch -gnatP, and then
1205 -- further modified by the use of pragma Polling in the gnat.adc file. This
1206 -- flag is used to set the initial value for Polling_Required at the start
1207 -- of analyzing each unit.
1209 Use_VADS_Size_Config : Boolean;
1211 -- This is the value of the configuration switch that controls the use of
1212 -- VADS_Size instead of Size whereever the attribute Size is used. It can
1213 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1214 -- This flag is used to set the initial value for Use_VADS_Size at the
1215 -- start of analyzing each unit. Note however that the setting of this flag
1216 -- is ignored for internal and predefined units (which are always compiled
1217 -- with the standard Size semantics).
1219 type Config_Switches_Type is private;
1220 -- Type used to save values of the switches set from Config values
1222 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1223 -- This procedure saves the current values of the switches which are
1224 -- initialized from the above Config values, and then resets these switches
1225 -- according to the Config value settings.
1227 procedure Set_Opt_Config_Switches
1228 (Internal_Unit : Boolean;
1229 Main_Unit : Boolean);
1230 -- This procedure sets the switches to the appropriate initial values. The
1231 -- parameter Internal_Unit is True for an internal or predefined unit, and
1232 -- affects the way the switches are set (see above). Main_Unit is true if
1233 -- switches are being set for the main unit (this affects setting of the
1234 -- assert/debug pragm switches, which are normally set false by default for
1235 -- an internal unit, except when the internal unit is the main unit, in
1236 -- which case we use the command line settings).
1238 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1239 -- This procedure restores a set of switch values previously saved by a
1240 -- call to Save_Opt_Switches.
1242 procedure Register_Opt_Config_Switches;
1243 -- This procedure is called after processing the gnat.adc file to record
1244 -- the values of the Config switches, as possibly modified by the use of
1245 -- command line switches and configuration pragmas.
1247 ------------------------
1248 -- Other Global Flags --
1249 ------------------------
1251 Expander_Active : Boolean := False;
1252 -- A flag that indicates if expansion is active (True) or deactivated
1253 -- (False). When expansion is deactivated all calls to expander routines
1254 -- have no effect. Note that the initial setting of False is merely to
1255 -- prevent saving of an undefined value for an initial call to the
1256 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1257 -- this flag, see package Expander. Indeed this flag might more logically
1258 -- be in the spec of Expander, but it is referenced by Errout, and it
1259 -- really seems wrong for Errout to depend on Expander.
1261 -----------------------
1262 -- Tree I/O Routines --
1263 -----------------------
1265 procedure Tree_Read;
1266 -- Reads switch settings from current tree file using Tree_Read
1268 procedure Tree_Write;
1269 -- Writes out switch settings to current tree file using Tree_Write
1271 --------------------------
1272 -- ASIS Version Control --
1273 --------------------------
1275 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1276 -- are supposed to be used in the GNAT/ASIS version check performed in
1277 -- the ASIS code (this package is also a part of the ASIS implementation).
1278 -- They are set by Tree_Read procedure, so they represent the version
1279 -- number (and the version string) of the compiler which has created the
1280 -- tree, and they are supposed to be compared with the corresponding values
1281 -- from the Gnatvsn package which is a part of ASIS implementation.
1283 Tree_Version_String : String (Gnat_Version_String'Range);
1284 -- Used to store the compiler version string read from a tree file to check
1285 -- if it is the same as stored in the version string in Gnatvsn. Therefore
1286 -- its length is taken directly from the version string in Gnatvsn. If the
1287 -- length of the version string stored in the tree is different, then
1288 -- versions are for sure different, and a string containing '?' characters
1289 -- is assigned to this variable as a result of tree read.
1291 Tree_ASIS_Version_Number : Int;
1292 -- Used to store the ASIS version number read from a tree file to check if
1293 -- it is the same as stored in the ASIS version number in Gnatvsn.
1297 type Config_Switches_Type is record
1298 Ada_Version : Ada_Version_Type;
1299 Ada_Version_Explicit : Ada_Version_Type;
1300 Assertions_Enabled : Boolean;
1301 Debug_Pragmas_Enabled : Boolean;
1302 Dynamic_Elaboration_Checks : Boolean;
1303 Exception_Locations_Suppressed : Boolean;
1304 Extensions_Allowed : Boolean;
1305 External_Name_Exp_Casing : External_Casing_Type;
1306 External_Name_Imp_Casing : External_Casing_Type;
1307 Persistent_BSS_Mode : Boolean;
1308 Polling_Required : Boolean;
1309 Use_VADS_Size : Boolean;
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