1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2007, 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 Hostparm; use Hostparm;
40 with Types; use Types;
42 with System.Strings; use System.Strings;
43 with System.WCh_Con; use System.WCh_Con;
47 ----------------------------------------------
48 -- Settings of Modes for Current Processing --
49 ----------------------------------------------
51 -- The following mode values represent the current state of processing.
52 -- The values set here are the default values. Unless otherwise noted,
53 -- the value may be reset in Switch-? with an appropropiate switch. In
54 -- some cases, the values can also be modified by pragmas, and in the
55 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
56 -- the default values.
58 Ada_Bind_File : Boolean := True;
60 -- Set True if binder file to be generated in Ada rather than C
62 type Ada_Version_Type is (Ada_83, Ada_95, Ada_05);
63 pragma Warnings (Off, Ada_Version_Type);
64 -- Versions of Ada for Ada_Version below. Note that these are ordered,
65 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
66 -- The Warnings_Off pragma stops warnings for Ada_Version >= Ada_05,
67 -- which we want to allow, so that things work OK when Ada_15 is added!
68 -- This warning is now removed, so this pragma can be removed some time???
70 Ada_Version_Default : Ada_Version_Type := Ada_05;
72 -- Default Ada version if no switch given
74 Ada_Version : Ada_Version_Type := Ada_Version_Default;
76 -- Current Ada version for compiler, as set by configuration pragmas,
77 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
78 -- predefined or internal file is compiled.
80 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
82 -- Like Ada_Version, but does not get set implicitly for predefined
83 -- or internal units, so it reflects the Ada version explicitly set
84 -- using configuration pragmas or compiler switches (or if neither
85 -- appears, it remains set to Ada_Version_Default). This is used in
86 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
87 -- where in the run-time we want the explicit version set.
89 Ada_Version_Runtime : Ada_Version_Type := Ada_05;
91 -- Ada version used to compile the runtime. Used to set Ada_Version (but
92 -- not Ada_Version_Explicit) when compiling predefined or internal units.
94 Ada_Final_Suffix : constant String := "final";
95 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
97 -- The name of the procedure that performs the finalization at the end of
98 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
100 Ada_Init_Suffix : constant String := "init";
101 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
103 -- The name of the procedure that performs initialization at the start
104 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
106 Ada_Main_Name_Suffix : constant String := "main";
108 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
109 -- can be referenced in a uniform manner to create either the default
110 -- value of Ada_Main_Name (declared below), or the non-default name
111 -- set by Gnatbind.Scan_Bind_Arg.
113 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
115 -- The name of the Ada package generated by the binder (when in Ada mode).
116 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
118 Address_Clause_Overlay_Warnings : Boolean := True;
120 -- Set False to disable address clause warnings
122 Address_Is_Private : Boolean := False;
124 -- Set True if package System has the line "type Address is private;"
126 All_Errors_Mode : Boolean := False;
128 -- Flag set to force display of multiple errors on a single line and
129 -- also repeated error messages for references to undefined identifiers
130 -- and certain other repeated error messages. Set by use of -gnatf.
132 All_Sources : Boolean := False;
134 -- Set to True to require all source files to be present. This flag is
135 -- directly modified by gnatmake to affect the shared binder routines.
137 Alternate_Main_Name : String_Ptr := null;
139 -- Set to non null when Bind_Alternate_Main_Name is True. This value
140 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
142 Assertions_Enabled : Boolean := False;
144 -- Enable assertions made using pragma Assert
146 ASIS_Mode : Boolean := False;
148 -- Enable semantic checks and tree transformations that are important
149 -- for ASIS but that are usually skipped if Operating_Mode is set to
150 -- Check_Semantics. This flag does not have the corresponding option to set
151 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
152 -- from the code of GNSA-based tool (a client may need to set ON the
153 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
154 -- make very much sense, because GNSA cannot do back annotation).
156 Back_Annotate_Rep_Info : Boolean := False;
158 -- If set True, enables back annotation of representation information
159 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
160 -- (list representation information) or -gnatt (generate tree). It is
161 -- also set true if certain Unchecked_Conversion instantiations require
162 -- checking based on annotated values.
164 Bind_Alternate_Main_Name : Boolean := False;
166 -- True if main should be called Alternate_Main_Name.all.
167 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
169 Bind_Main_Program : Boolean := True;
171 -- Set to False if not binding main Ada program
173 Bind_For_Library : Boolean := False;
175 -- Set to True if the binder needs to generate a file designed for
176 -- building a library. May be set to True by Gnatbind.Scan_Bind_Arg.
178 Bind_Only : Boolean := False;
180 -- Set to True to skip compile and link steps
181 -- (except when Compile_Only and/or Link_Only are True).
183 Blank_Deleted_Lines : Boolean := False;
185 -- Output empty lines for each line of preprocessed input that is deleted
186 -- in the output, including preprocessor lines starting with a '#'.
188 Brief_Output : Boolean := False;
190 -- Force brief error messages to standard error, even if verbose mode is
191 -- set (so that main error messages go to standard output).
193 Build_Bind_And_Link_Full_Project : Boolean := False;
195 -- Set to True to build, bind and link all the sources of a project file
198 Check_Object_Consistency : Boolean := False;
199 -- GNATBIND, GNATMAKE
200 -- Set to True to check whether every object file is consistent with
201 -- its corresponding ada library information (ALI) file. An object
202 -- file is inconsistent with the corresponding ALI file if the object
203 -- file does not exist or if it has an older time stamp than the ALI file.
204 -- Default above is for GNATBIND. GNATMAKE overrides this default to
205 -- True (see Make.Initialize) since we normally do need to check source
206 -- consistencies in gnatmake.
208 Check_Only : Boolean := False;
210 -- Set to True to do checks only, no output of binder file
212 Check_Readonly_Files : Boolean := False;
214 -- Set to True to check readonly files during the make process
216 Check_Source_Files : Boolean := True;
217 -- GNATBIND, GNATMAKE
218 -- Set to True to enable consistency checking for any source files that
219 -- are present (i.e. date must match the date in the library info file).
220 -- Set to False for object file consistency check only. This flag is
221 -- directly modified by gnatmake, to affect the shared binder routines.
223 Check_Switches : Boolean := False;
225 -- Set to True to check compiler options during the make process
227 Check_Unreferenced : Boolean := False;
229 -- Set to True to enable checking for unreferenced entities other
230 -- than formal parameters (for which see Check_Unreferenced_Formals)
232 Check_Unreferenced_Formals : Boolean := False;
234 -- Set True to check for unreferenced formals. This is turned on by
235 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
237 Check_Withs : Boolean := False;
239 -- Set to True to enable checking for unused withs, and also the case
240 -- of withing a package and using none of the entities in the package.
242 Commands_To_Stdout : Boolean := False;
244 -- True if echoed commands to be written to stdout instead of stderr
246 Comment_Deleted_Lines : Boolean := False;
248 -- True if source lines removed by the preprocessor should be commented
249 -- in the output file.
251 Compile_Only : Boolean := False;
252 -- GNATMAKE, GNATCLEAN, GPRMAKE
253 -- GNATMAKE, GPRMAKE: set to True to skip bind and link steps (except when
254 -- Bind_Only is True).
255 -- GNATCLEAN: set to True to only the files produced by the compiler are to
256 -- be deleted, but not the library files or executable files.
258 Config_File : Boolean := True;
260 -- Set to False to inhibit reading and processing of gnat.adc file
262 Config_File_Names : String_List_Access := null;
264 -- Names of configuration pragmas files (given by switches -gnatec)
266 Configurable_Run_Time_Mode : Boolean := False;
268 -- Set True if the compiler is operating in configurable run-time mode.
269 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
270 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
271 -- for details on the handling of the latter pragma.
273 Constant_Condition_Warnings : Boolean := False;
275 -- Set to True to activate warnings on constant conditions
277 Create_Mapping_File : Boolean := False;
279 -- Set to True (-C switch) to indicate that the compiler will be invoked
280 -- with a mapping file (-gnatem compiler switch).
282 Debug_Pragmas_Enabled : Boolean := False;
284 -- Enable debug statements from pragma Debug
286 subtype Debug_Level_Value is Nat range 0 .. 3;
287 Debugger_Level : Debug_Level_Value := 0;
289 -- The value given to the -g parameter. The default value for -g with
290 -- no value is 2. This is usually ignored by GNATBIND, except in the
291 -- VMS version where it is passed as an argument to __gnat_initialize
292 -- to trigger the activation of the remote debugging interface.
293 -- Is this still true ???
295 Debug_Generated_Code : Boolean := False;
297 -- Set True (-gnatD switch) to debug generated expanded code instead
298 -- of the original source code. Causes debugging information to be
299 -- written with respect to the generated code file that is written.
301 Default_Exit_Status : Int := 0;
303 -- Set the default exit status value. Set by the -Xnnn switch for the
306 Default_Stack_Size : Int := -1;
308 -- Set to default primary stack size in units of bytes. Set by
309 -- the -dnnn switch for the binder. A value of -1 indicates that no
310 -- default was set by the binder.
312 Default_Sec_Stack_Size : Int := -1;
314 -- Set to default secondary stack size in units of bytes. Set by
315 -- the -Dnnn switch for the binder. A value of -1 indicates that no
316 -- default was set by the binder, and that the default should be the
317 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
319 Detect_Blocking : Boolean := False;
321 -- Set True to force the run time to raise Program_Error if calls to
322 -- potentially blocking operations are detected from protected actions.
324 Display_Compilation_Progress : Boolean := False;
326 -- Set True (-d switch) to display information on progress while compiling
327 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
329 type Distribution_Stub_Mode_Type is
332 -- Normal mode, no generation/compilation of distribution stubs
334 Generate_Receiver_Stub_Body,
335 -- The unit being compiled is the RCI body, and the compiler will
336 -- generate the body for the receiver stubs and compile it.
338 Generate_Caller_Stub_Body);
339 -- The unit being compiled is the RCI spec, and the compiler will
340 -- generate the body for the caller stubs and compile it.
342 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
344 -- This enumeration variable indicates the five states of distribution
345 -- annex stub generation/compilation.
347 Do_Not_Execute : Boolean := False;
349 -- Set to True if no actual compilations should be undertaken.
351 Dump_Source_Text : Boolean := False;
353 -- Set to True (by -gnatL) to dump source text intermingled with generated
354 -- code. Effective only if either of Debug/Print_Generated_Code is true.
356 Dynamic_Elaboration_Checks : Boolean := False;
358 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
359 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
361 Dynamic_Stack_Measurement : Boolean := False;
363 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
365 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
367 -- Number of measurements we want to store during dynamic stack analysis.
368 -- When the buffer is full, non-storable results will be output on the fly.
369 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
370 -- by processing of -u flag for gnatbind.
372 Elab_Dependency_Output : Boolean := False;
374 -- Set to True to output complete list of elaboration constraints
376 Elab_Order_Output : Boolean := False;
378 -- Set to True to output chosen elaboration order
380 Elab_Warnings : Boolean := False;
382 -- Set to True to generate full elaboration warnings (-gnatwl)
384 Enable_Overflow_Checks : Boolean := False;
386 -- Set to True if -gnato (enable overflow checks) switch is set,
389 Overflow_Checks_Unsuppressed : Boolean := False;
391 -- Set to True if at least one pragma Unsuppress
392 -- (All_Checks|Overflow_Checks) has been processed.
394 Error_Msg_Line_Length : Nat := 0;
396 -- Records the error message line length limit. If this is set to zero,
397 -- then we get the old style behavior, in which each call to the error
398 -- message routines generates one line of output as a separate message.
399 -- If it is set to a non-zero value, then continuation lines are folded
400 -- to make a single long message, and then this message is split up into
401 -- multiple lines not exceeding the specified length. Set by -gnatLnnn.
403 Exception_Locations_Suppressed : Boolean := False;
405 -- This flag is set True if a Suppress_Exception_Locations configuration
406 -- pragma is currently active.
408 type Exception_Mechanism_Type is
409 -- Determines the handling of exceptions. See Exp_Ch11 for details
411 (Front_End_Setjmp_Longjmp_Exceptions,
412 -- Exceptions use setjmp/longjmp generated explicitly by the
413 -- front end (this includes gigi or other equivalent parts of
414 -- the code generator). AT END handlers are converted into
415 -- exception handlers by the front end in this mode.
417 Back_End_Exceptions);
418 -- Exceptions are handled by the back end. The front end simply
419 -- generates the handlers as they appear in the source, and AT
420 -- END handlers are left untouched (they are not converted into
421 -- exception handlers when operating in this mode.
422 pragma Convention (C, Exception_Mechanism_Type);
424 Exception_Mechanism : Exception_Mechanism_Type :=
425 Front_End_Setjmp_Longjmp_Exceptions;
427 -- Set to the appropriate value depending on the default as given in
428 -- system.ads (ZCX_By_Default, GCC_ZCX_Support).
429 -- The C convention is there to make this variable accessible to gigi.
431 Exception_Tracebacks : Boolean := False;
433 -- Set to True to store tracebacks in exception occurrences (-E)
435 Extensions_Allowed : Boolean := False;
437 -- Set to True by switch -gnatX if GNAT specific language extensions
438 -- are allowed. For example, the use of 'Constrained with objects of
439 -- generic types is a GNAT extension.
441 type External_Casing_Type is (
442 As_Is, -- External names cased as they appear in the Ada source
443 Uppercase, -- External names forced to all uppercase letters
444 Lowercase); -- External names forced to all lowercase letters
446 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
448 -- The setting of this flag determines the casing of external names
449 -- when the name is implicitly derived from an entity name (i.e. either
450 -- no explicit External_Name or Link_Name argument is used, or, in the
451 -- case of extended DEC pragmas, the external name is given using an
452 -- identifier. The As_Is setting is not permitted here (since this would
453 -- create Ada source programs that were case sensitive).
455 External_Name_Exp_Casing : External_Casing_Type := As_Is;
457 -- The setting of this flag determines the casing of an external name
458 -- specified explicitly with a string literal. As_Is means the string
459 -- literal is used as given with no modification to the casing. If
460 -- Lowercase or Uppercase is set, then the string is forced to all
461 -- lowercase or all uppercase letters as appropriate. Note that this
462 -- setting has no effect if the external name is given using an identifier
463 -- in the case of extended DEC import/export pragmas (in this case the
464 -- casing is controlled by External_Name_Imp_Casing), and also has no
465 -- effect if an explicit Link_Name is supplied (a link name is always
466 -- used exactly as given).
468 External_Unit_Compilation_Allowed : Boolean := False;
470 -- When True (set by gnatmake switch -x), allow compilation of sources
471 -- that are not part of any project file.
473 Float_Format : Character := ' ';
475 -- A non-blank value indicates that a Float_Format pragma has been
476 -- processed, in which case this variable is set to 'I' for IEEE or
477 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
480 Float_Format_Long : Character := ' ';
482 -- A non-blank value indicates that a Long_Float pragma has been
483 -- processed (this pragma is recognized only in OpenVMS versions
484 -- of GNAT), in which case this variable is set to D or G for
485 -- D_Float or G_Float.
487 Force_ALI_Tree_File : Boolean := False;
489 -- Force generation of ALI file even if errors are encountered.
490 -- Also forces generation of tree file if -gnatt is also set.
492 Force_Checking_Of_Elaboration_Flags : Boolean := False;
494 -- True if binding with forced checking of the elaboration flags
497 Force_Compilations : Boolean := False;
499 -- Set to force recompilations even when the objects are up-to-date.
501 Full_Path_Name_For_Brief_Errors : Boolean := False;
502 -- GNAT, GNATMAKE, GNATCLEAN, GPRMAKE
503 -- When True, in Brief_Output mode, each error message line
504 -- will start with the full path name of the source.
505 -- When False, only the file name without directory information
508 Full_List : Boolean := False;
510 -- Set True to generate full source listing with embedded errors
512 Full_List_File_Name : String_Ptr := null;
514 -- Set to file name to generate full source listing to named file (or if
515 -- the name is of the form .xxx, then to name.xxx where name is the source
516 -- file name with extension stripped.
518 Generating_Code : Boolean := False;
520 -- True if the frontend finished its work and has called the backend to
521 -- processs the tree and generate the object file.
523 Global_Discard_Names : Boolean := False;
525 -- True if a pragma Discard_Names appeared as a configuration pragma for
526 -- the current compilation unit.
528 GNAT_Mode : Boolean := False;
530 -- True if compiling in GNAT system mode (-gnatg switch)
532 HLO_Active : Boolean := False;
534 -- True if High Level Optimizer is activated (-gnatH switch)
536 Implementation_Unit_Warnings : Boolean := True;
538 -- Set True to active warnings for use of implementation internal units.
539 -- Can be controlled by use of -gnatwi/-gnatwI.
541 Identifier_Character_Set : Character;
543 -- This variable indicates the character set to be used for identifiers.
544 -- The possible settings are:
545 -- '1' Latin-5 (ISO-8859-1)
546 -- '2' Latin-5 (ISO-8859-2)
547 -- '3' Latin-5 (ISO-8859-3)
548 -- '4' Latin-5 (ISO-8859-4)
549 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
550 -- '9' Latin-5 (ISO-8859-9)
551 -- 'p' PC (US, IBM page 437)
552 -- '8' PC (European, IBM page 850)
553 -- 'f' Full upper set (all distinct)
554 -- 'n' No upper characters (Ada 83 rules)
555 -- 'w' Latin-1 plus wide characters allowed in identifiers
557 -- The setting affects the set of letters allowed in identifiers and the
558 -- upper/lower case equivalences. It does not affect the interpretation of
559 -- character and string literals, which are always stored using the actual
560 -- coding in the source program. This variable is initialized to the
561 -- default value appropriate to the system (in Osint.Initialize), and then
562 -- reset if a command line switch is used to change the setting.
564 Ineffective_Inline_Warnings : Boolean := False;
566 -- Set True to activate warnings if front-end inlining (-gnatN) is not
567 -- able to actually inline a particular call (or all calls). Can be
568 -- controlled by use of -gnatwp/-gnatwP.
570 Init_Or_Norm_Scalars : Boolean := False;
572 -- Set True if a pragma Initialize_Scalars applies to the current unit.
573 -- Also set True if a pragma Normalize_Scalars applies.
575 Initialize_Scalars : Boolean := False;
577 -- Set True if a pragma Initialize_Scalars applies to the current unit.
578 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
580 Initialize_Scalars_Mode1 : Character := 'I';
581 Initialize_Scalars_Mode2 : Character := 'N';
583 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
584 -- is IN (invalid values), used if no -S switch is used.
586 Inline_Active : Boolean := False;
588 -- Set True to activate pragma Inline processing across modules. Default
589 -- for now is not to inline across module boundaries.
591 Interface_Library_Unit : Boolean := False;
593 -- Set to True to indicate that at least one ALI file is an interface ALI:
594 -- then elaboration flag checks are to be generated in the binder
597 Follow_Links : Boolean := False;
599 -- Set to True (-eL) to process the project files in trusted mode
601 Front_End_Inlining : Boolean := False;
603 -- Set True to activate inlining by front-end expansion
605 Inline_Processing_Required : Boolean := False;
607 -- Set True if inline processing is required. Inline processing is
608 -- required if an active Inline pragma is processed. The flag is set
609 -- for a pragma Inline or Inline_Always that is actually active.
611 In_Place_Mode : Boolean := False;
613 -- Set True to store ALI and object files in place ie in the object
614 -- directory if these files already exist or in the source directory
617 Keep_Going : Boolean := False;
619 -- When True signals to ignore compilation errors and keep
620 -- processing sources until there is no more work.
622 Keep_Temporary_Files : Boolean := False;
624 -- When True the temporary files created by the GNAT driver are not
625 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
627 Link_Only : Boolean := False;
629 -- Set to True to skip compile and bind steps
630 -- (except when Bind_Only is set to True).
632 List_Restrictions : Boolean := False;
634 -- Set to True to list restrictions pragmas that could apply to partition
636 List_Units : Boolean := False;
638 -- List units in the active library for a compilation (-gnatu switch)
640 List_Closure : Boolean := False;
642 -- List all sources in the closure of a main (-R gnatbind switch)
644 List_Dependencies : Boolean := False;
646 -- When True gnatmake verifies that the objects are up to date and
647 -- outputs the list of object dependencies (-M switch).
648 -- Output depends if -a switch is used or not.
649 -- This list can be used directly in a Makefile.
651 List_Representation_Info : Int range 0 .. 3 := 0;
653 -- Set non-zero by -gnatR switch to list representation information.
654 -- The settings are as follows:
656 -- 0 = no listing of representation information (default as above)
657 -- 1 = list rep info for user defined record and array types
658 -- 2 = list rep info for all user defined types and objects
659 -- 3 = like 2, but variable fields are decoded symbolically
661 List_Representation_Info_To_File : Boolean := False;
663 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3
664 -- to be written to file.rep (where file is the name of the source
665 -- file) instead of stdout. For example, if file x.adb is compiled
666 -- using -gnatR2s then representation info is written to x.adb.ref.
668 List_Representation_Info_Mechanisms : Boolean := False;
670 -- Set true by -gnatRm switch. Causes information on mechanisms to
671 -- be included in the representation output information.
673 List_Preprocessing_Symbols : Boolean := False;
675 -- Set to True if symbols for preprocessing a source are to be listed
676 -- before preprocessing occurs. Set to True by switch -s of gnatprep
677 -- or -s in preprocessing data file for the compiler.
679 type Create_Repinfo_File_Proc is access procedure (Src : String);
680 type Write_Repinfo_Line_Proc is access procedure (Info : String);
681 type Close_Repinfo_File_Proc is access procedure;
682 -- Types used for procedure addresses below
684 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
685 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
686 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
688 -- These three locations are left null when operating in non-compiler
689 -- (e.g. ASIS mode), but when operating in compiler mode, they are
690 -- set to point to the three corresponding procedures in Osint-C. The
691 -- reason for this slightly strange interface is to prevent Repinfo
692 -- from dragging in Osint in ASIS mode, which would include a lot of
693 -- unwanted units in the ASIS build.
695 type Create_List_File_Proc is access procedure (S : String);
696 type Write_List_Info_Proc is access procedure (S : String);
697 type Close_List_File_Proc is access procedure;
698 -- Types used for procedure addresses below
700 Create_List_File_Access : Create_List_File_Proc := null;
701 Write_List_Info_Access : Write_List_Info_Proc := null;
702 Close_List_File_Access : Close_List_File_Proc := null;
704 -- These three locations are left null when operating in non-compiler
705 -- (e.g. from the binder), but when operating in compiler mode, they are
706 -- set to point to the three corresponding procedures in Osint-C. The
707 -- reason for this slightly strange interface is to prevent Repinfo
708 -- from dragging in Osint-C in the binder, which would include unwanted
709 -- units in the binder.
711 Locking_Policy : Character := ' ';
713 -- Set to ' ' for the default case (no locking policy specified).
714 -- Reset to first character (uppercase) of locking policy name if a
715 -- valid pragma Locking_Policy is encountered.
717 Locking_Policy_Sloc : Source_Ptr := No_Location;
719 -- Remember location of previous Locking_Policy pragma. This is used
720 -- for inconsistency error messages. A value of System_Location is
721 -- used if the policy is set in package System.
723 Look_In_Primary_Dir : Boolean := True;
724 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
725 -- Set to False if a -I- was present on the command line.
726 -- When True we are allowed to look in the primary directory to locate
727 -- other source or library files.
729 Make_Steps : Boolean := False;
731 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
734 Main_Index : Int := 0;
736 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
737 -- the main program is the nnn unit in a multi-unit source file.
739 Mapping_File_Name : String_Ptr := null;
741 -- File name of mapping between unit names, file names and path names.
742 -- (given by switch -gnatem)
744 Maximum_Errors : Int := 9999;
746 -- Maximum default number of errors before compilation is terminated.
747 -- Can be overridden using -gnatm (GNAT) or -m (GNATBIND) switch.
749 Maximum_File_Name_Length : Int;
751 -- Maximum number of characters allowed in a file name, not counting the
752 -- extension, as set by the appropriate switch. If no switch is given,
753 -- then this value is initialized by Osint to the appropriate value.
755 Maximum_Processes : Positive := 1;
757 -- Maximum number of processes that should be spawned to carry out
760 Minimal_Recompilation : Boolean := False;
762 -- Set to True if minimal recompilation mode requested
764 Special_Exception_Package_Used : Boolean := False;
766 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
767 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
768 -- local raise statements into gotos in the presence of either package.
770 Multiple_Unit_Index : Int;
772 -- This is set non-zero if the current unit is being compiled in multiple
773 -- unit per file mode, meaning that the current unit is selected from the
774 -- sequence of units in the current source file, using the value stored
775 -- in this variable (e.g. 2 = select second unit in file). A value of
776 -- zero indicates that we are in normal (one unit per file) mode.
778 No_Main_Subprogram : Boolean := False;
779 -- GNATMAKE, GNATBIND
780 -- Set to True if compilation/binding of a program without main
781 -- subprogram requested.
783 No_Run_Time_Mode : Boolean := False;
785 -- This flag is set True if a No_Run_Time pragma is encountered. See
786 -- spec of Rtsfind for a full description of handling of this pragma.
788 No_Stdinc : Boolean := False;
789 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
790 -- Set to True if no default source search dirs added to search list
792 No_Stdlib : Boolean := False;
793 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
794 -- Set to True if no default library search dirs added to search list
796 No_Strict_Aliasing : Boolean := False;
798 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
800 Normalize_Scalars : Boolean := False;
802 -- Set True if a pragma Normalize_Scalars applies to the current unit.
803 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
805 Object_Directory_Present : Boolean := False;
807 -- Set to True when an object directory is specified with option -D
809 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
810 Operating_Mode : Operating_Mode_Type := Generate_Code;
812 -- Indicates the operating mode of the compiler. The default is generate
813 -- code, which runs the parser, semantics and backend. Switches can be
814 -- used to set syntax checking only mode, or syntax and semantics checking
815 -- only mode. Operating_Mode can also be modified as a result of detecting
816 -- errors during the compilation process. In particular if any serious
817 -- error is detected then this flag is reset from Generate_Code to
818 -- Check_Semantics after generating an error message.
820 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
822 -- Indicates the original operating mode of the compiler as set by
823 -- compiler options. This is identical to Operating_Mode except that
824 -- this is not affected by errors.
826 Optimization_Level : Int;
827 pragma Import (C, Optimization_Level, "optimize");
828 -- This constant reflects the optimization level (0,1,2 for -O0,-O1,-O2)
830 Output_File_Name_Present : Boolean := False;
831 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
832 -- Set to True when the output C file name is given with option -o
833 -- for GNATBIND, when the object file name is given with option
834 -- -gnatO for GNAT or when the executable is given with option -o
835 -- for GNATMAKE or GPRMAKE.
837 Output_Linker_Option_List : Boolean := False;
839 -- True if output of list of linker options is requested (-K switch set)
841 Output_Object_List : Boolean := False;
843 -- True if output of list of objects is requested (-O switch set)
845 Persistent_BSS_Mode : Boolean := False;
847 -- True if a Persistent_BSS configuration pragma is in effect, causing
848 -- potentially persistent data to be placed in the persistent_bss section.
850 Pessimistic_Elab_Order : Boolean := False;
852 -- True if pessimistic elaboration order is to be chosen (-p switch set)
854 Polling_Required : Boolean := False;
856 -- Set to True if polling for asynchronous abort is enabled by using
857 -- the -gnatP option for GNAT.
859 Preprocessing_Data_File : String_Ptr := null;
861 -- Set by switch -gnatep=. The file name of the prepocessing data file.
863 Print_Generated_Code : Boolean := False;
865 -- Set to True to enable output of generated code in source form. This
866 -- flag is set by the -gnatG switch.
868 Print_Standard : Boolean := False;
870 -- Set to true to enable printing of package standard in source form.
871 -- This flag is set by the -gnatS switch
873 Propagate_Exceptions : Boolean := False;
875 -- Indicates if subprogram descriptor exception tables should be
876 -- built for imported subprograms. Set True if a Propagate_Exceptions
877 -- pragma applies to the extended main unit.
879 type Usage is (Unknown, Not_In_Use, In_Use);
880 Project_File_In_Use : Usage := Unknown;
882 -- Indicates if a project file is used or not.
883 -- Set to In_Use by the first SFNP pragma.
885 Queuing_Policy : Character := ' ';
887 -- Set to ' ' for the default case (no queuing policy specified).
888 -- Reset to first character (uppercase) of locking policy name if a valid
889 -- Queuing_Policy pragma is encountered.
891 Queuing_Policy_Sloc : Source_Ptr := No_Location;
893 -- Remember location of previous Queuing_Policy pragma. This is used
894 -- for inconsistency error messages. A value of System_Location is
895 -- used if the policy is set in package System.
897 Quiet_Output : Boolean := False;
898 -- GNATMAKE, GNATCLEAN, GPRMAKE
899 -- Set to True if the tool should not have any output if there are no
900 -- errors or warnings.
902 Replace_In_Comments : Boolean := False;
904 -- Set to True if -C switch used
906 RTS_Lib_Path_Name : String_Ptr := null;
907 RTS_Src_Path_Name : String_Ptr := null;
909 -- Set to the "adalib" and "adainclude" directories of the run time
910 -- specified by --RTS=.
912 RTS_Switch : Boolean := False;
913 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
914 -- Set to True when the --RTS switch is set
916 Run_Path_Option : Boolean := True;
917 -- GNATMAKE, GNATLINK
918 -- Set to False when no run_path_option should be issued to the linker
920 Search_Directory_Present : Boolean := False;
922 -- Set to True when argument is -I. Reset to False when next argument,
923 -- a search directory path is taken into account. Note that this is
924 -- quite different from other switches in this section in that it is
925 -- only set in a transitory manner as a result of scanning a -I switch
926 -- with no file name, and if set, is an indication that the next argument
927 -- is to be treated as a file name.
929 Sec_Stack_Used : Boolean := False;
931 -- Set True if generated code uses the System.Secondary_Stack package.
932 -- For the binder, set if any unit uses the secondary stack package.
934 Setup_Projects : Boolean := False;
936 -- Set to True for GNAT SETUP: the Project Manager creates non existing
937 -- object, library and exec directories.
939 Shared_Libgnat : Boolean;
941 -- Set to True if a shared libgnat is requested by using the -shared
942 -- option for GNATBIND and to False when using the -static option. The
943 -- value of this flag is set by Gnatbind.Scan_Bind_Arg.
945 Stack_Checking_Enabled : Boolean;
947 -- Set to indicate if -fstack-check switch is set for the compilation. True
948 -- means that the switch is set, so that stack checking is enabled. False
949 -- means that the switch is not set (no stack checking). This value is
950 -- obtained from the external imported value flag_stack_check in the gcc
951 -- backend (see Frontend) and may be referenced throughout the compilation
954 Style_Check : Boolean := False;
956 -- Set True to perform style checks. Activates checks carried out
957 -- in package Style (see body of this package for details of checks)
958 -- This flag is set True by either the -gnatg or -gnaty switches.
960 System_Extend_Pragma_Arg : Node_Id := Empty;
962 -- Set non-empty if and only if a correct Extend_System pragma was present
963 -- in which case it points to the argument of the pragma, and the name can
964 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
966 System_Extend_Unit : Node_Id := Empty;
968 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
969 -- is never appropriate in GNAT_Mode (and causes troubles, including
970 -- bogus circularities, if we try to compile the run-time library with
971 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
972 -- is a copy of the value set in System_Extend_Pragma_Arg.
974 Subunits_Missing : Boolean := False;
976 -- This flag is set true if missing subunits are detected with code
977 -- generation active. This causes code generation to be skipped.
979 Suppress_Checks : Boolean := False;
981 -- Set to True if -gnatp (suppress all checks) switch present.
983 Suppress_Options : Suppress_Array;
985 -- Flags set True to suppress corresponding check, i.e. add an implicit
986 -- pragma Suppress at the outer level of each unit compiled. Note that
987 -- these suppress actions can be overridden by the use of the Unsuppress
988 -- pragma. This variable is initialized by Osint.Initialize.
990 Suppress_Back_Annotation : Boolean := False;
992 -- This flag is set True if back annotation of representation information
993 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
994 -- This avoids unnecessary time being spent on back annotation.
996 Table_Factor : Int := 1;
998 -- Factor by which all initial table sizes set in Alloc are multiplied.
999 -- Used in Table to calculate initial table sizes (the initial table size
1000 -- is the value in Alloc, used as the Table_Initial parameter value,
1001 -- multiplied by the factor given here. The default value is used if no
1002 -- -gnatT switch appears.
1004 Task_Dispatching_Policy : Character := ' ';
1006 -- Set to ' ' for the default case (no task dispatching policy specified).
1007 -- Reset to first character (uppercase) of task dispatching policy name
1008 -- if a valid Task_Dispatching_Policy pragma is encountered.
1010 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
1012 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1013 -- used for inconsistency error messages. A value of System_Location is
1014 -- used if the policy is set in package System.
1016 Tasking_Used : Boolean := False;
1017 -- Set True if any tasking construct is encountered. Used to activate the
1018 -- output of the Q, L and T lines in ALI files.
1020 Time_Slice_Set : Boolean := False;
1022 -- Set True if a pragma Time_Slice is processed in the main unit, or
1023 -- if the -gnatTnn switch is present to set a time slice value.
1025 Time_Slice_Value : Nat;
1027 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1028 -- Time_Slice pragma has been processed. Set to the time slice value in
1029 -- microseconds. Negative values are stored as zero, and the value is not
1030 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1031 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1033 Tolerate_Consistency_Errors : Boolean := False;
1035 -- Tolerate time stamp and other consistency errors. If this flag is set to
1036 -- True (-t), then inconsistencies result in warnings rather than errors.
1038 Tree_Output : Boolean := False;
1040 -- Set to True (-gnatt) to generate output tree file
1042 Try_Semantics : Boolean := False;
1044 -- Flag set to force attempt at semantic analysis, even if parser errors
1045 -- occur. This will probably cause blowups at this stage in the game. On
1046 -- the other hand, most such blowups will be caught cleanly and simply
1047 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
1049 Undefined_Symbols_Are_False : Boolean := False;
1051 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1052 -- file for the compiler. Indicates that while preprocessing sources,
1053 -- symbols that are not defined have the value FALSE.
1055 Unique_Error_Tag : Boolean := Tag_Errors;
1057 -- Indicates if error messages are to be prefixed by the string error:
1058 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1060 Universal_Addressing_On_AAMP : Boolean := False;
1062 -- Indicates if library-level objects should be accessed and updated using
1063 -- universal addressing instructions on the AAMP architecture. This flag is
1064 -- set to True when pragma Universal_Data is given as a configuration
1067 Unreserve_All_Interrupts : Boolean := False;
1069 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1070 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1071 -- corresponding attribute set in GNATBIND.
1073 Upper_Half_Encoding : Boolean := False;
1075 -- Normally set False, indicating that upper half ASCII characters are
1076 -- used in the normal way to represent themselves. If the wide character
1077 -- encoding method uses the upper bit for this encoding, then this flag is
1078 -- set True, and upper half characters in the source indicate the start of
1079 -- a wide character sequence.
1081 Usage_Requested : Boolean := False;
1082 -- GNAT, GNATBIND, GNATMAKE
1083 -- Set to True if -h (-gnath for the compiler) switch encountered
1084 -- requesting usage information
1086 Use_Pragma_Linker_Constructor : Boolean := False;
1088 -- True if pragma Linker_Constructor applies to adainit
1090 Use_VADS_Size : Boolean := False;
1092 -- Set to True if a valid pragma Use_VADS_Size is processed
1094 Validity_Checks_On : Boolean := True;
1096 -- This flag determines if validity checking is on or off. The initial
1097 -- state is on, and the required default validity checks are active. The
1098 -- actual set of checks that is performed if Validity_Checks_On is set is
1099 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1100 -- is controlled by pragma Validity_Checks (On | Off), and also some
1101 -- generated compiler code (typically code that has to do with validity
1102 -- check generation) is compiled with this flag set to False. This flag is
1103 -- set to False by the -gnatp switch.
1105 Verbose_Mode : Boolean := False;
1106 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1108 -- Set to True to get verbose mode (full error message text and location
1109 -- information sent to standard output, also header, copyright and summary)
1111 type Verbosity_Level_Type is (None, Low, Medium, High);
1112 Verbosity_Level : Verbosity_Level_Type := High;
1113 -- GNATMAKE, GPRMAKE
1114 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1115 -- the level of verbosity of informational messages:
1117 -- In Low Verbosity, the reasons why a source is recompiled, the name
1118 -- of the executable and the reason it must be rebuilt is output.
1120 -- In Medium Verbosity, additional lines are output for each ALI file
1123 -- In High Verbosity, additional lines are output when the ALI file
1124 -- is part of an Ada library, is read-only or is part of the runtime.
1126 Warn_On_Ada_2005_Compatibility : Boolean := True;
1128 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1129 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1130 -- mode. Set False by -gnatwY.
1132 Warn_On_Assumed_Low_Bound : Boolean := True;
1134 -- Set to True to activate warnings for string parameters that are indexed
1135 -- with literals or S'Length, presumably assuming a lower bound of one. Set
1136 -- False by -gnatwW.
1138 Warn_On_Bad_Fixed_Value : Boolean := False;
1140 -- Set to True to generate warnings for static fixed-point expression
1141 -- values that are not an exact multiple of the small value of the type.
1143 Warn_On_Constant : Boolean := False;
1145 -- Set to True to generate warnings for variables that could be declared
1146 -- as constants. Modified by use of -gnatwk/K.
1148 Warn_On_Deleted_Code : Boolean := False;
1150 -- Set to True to generate warnings for code deleted by the front end
1151 -- for conditional statements whose outcome is known at compile time.
1152 -- Modified by use of -gnatwt/T.
1154 Warn_On_Dereference : Boolean := False;
1156 -- Set to True to generate warnings for implicit dereferences for array
1157 -- indexing and record component access. Modified by use of -gnatwd/D.
1159 Warn_On_Export_Import : Boolean := True;
1161 -- Set to True to generate warnings for suspicious use of export or
1162 -- import pragmas. Modified by use of -gnatwx/X.
1164 Warn_On_Hiding : Boolean := False;
1166 -- Set to True to generate warnings if a declared entity hides another
1167 -- entity. The default is that this warning is suppressed.
1169 Warn_On_Modified_Unread : Boolean := False;
1171 -- Set to True to generate warnings if a variable is assigned but is never
1172 -- read. The default is that this warning is suppressed. Also controls
1173 -- warnings about assignments whose value is never read.
1175 Warn_On_No_Value_Assigned : Boolean := True;
1177 -- Set to True to generate warnings if no value is ever assigned to a
1178 -- variable that is at least partially uninitialized. Set to false to
1179 -- suppress such warnings. The default is that such warnings are enabled.
1181 Warn_On_Non_Local_Exception : Boolean := True;
1183 -- Set to True to generate warnings for non-local exception raises and also
1184 -- handlers that can never handle a local raise. This warning is only ever
1185 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1186 -- default is to generate the warnings if the restriction is set.
1188 Warn_On_Obsolescent_Feature : Boolean := False;
1190 -- Set to True to generate warnings on use of any feature in Annex or if a
1191 -- subprogram is called for which a pragma Obsolescent applies.
1193 Warn_On_Questionable_Missing_Parens : Boolean := True;
1195 -- Set to True to generate warnings for cases where parenthese are missing
1196 -- and the usage is questionable, because the intent is unclear.
1198 Warn_On_Redundant_Constructs : Boolean := False;
1200 -- Set to True to generate warnings for redundant constructs (e.g. useless
1201 -- assignments/conversions). The default is that this warning is disabled.
1203 Warn_On_Object_Renames_Function : Boolean := False;
1205 -- Set to True to generate warnings when a function result is renamed as
1206 -- an object. The default is that this warning is disabled.
1208 Warn_On_Reverse_Bit_Order : Boolean := True;
1210 -- Set to True to generate warning (informational) messages for component
1211 -- clauses that are affected by non-standard bit-order. The default is
1212 -- that this warning is enabled.
1214 Warn_On_Unchecked_Conversion : Boolean := True;
1216 -- Set to True to generate warnings for unchecked conversions that may have
1217 -- non-portable semantics (e.g. because sizes of types differ). The default
1218 -- is that this warning is enabled.
1220 Warn_On_Unrecognized_Pragma : Boolean := True;
1222 -- Set to True to generate warnings for unrecognized pragmas. The default
1223 -- is that this warning is enabled.
1225 Warn_On_Unrepped_Components : Boolean := False;
1227 -- Set to True to generate warnings for the case of components of record
1228 -- which have a record representation clause but this component does not
1229 -- have a component clause. The default is that this warning is disabled.
1231 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1232 Warning_Mode : Warning_Mode_Type := Normal;
1234 -- Controls treatment of warning messages. If set to Suppress, warning
1235 -- messages are not generated at all. In Normal mode, they are generated
1236 -- but do not count as errors. In Treat_As_Error mode, warning messages
1237 -- are generated and are treated as errors.
1239 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1241 -- Method used for encoding wide characters in the source program. See
1242 -- description of type in unit System.WCh_Con for a list of the methods
1243 -- that are currently supported. Note that brackets notation is always
1244 -- recognized in source programs regardless of the setting of this
1245 -- variable. The default setting causes only the brackets notation to be
1246 -- recognized. If this is the main unit, this setting also controls the
1247 -- output of the W=? parameter in the ALI file, which is used to provide
1248 -- the default for Wide_Text_IO files.
1250 Xref_Active : Boolean := True;
1252 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1254 Zero_Formatting : Boolean := False;
1256 -- Do no formatting (no title, no leading spaces, no empty lines) in
1257 -- auxiliary outputs (-e, -K, -l, -R).
1259 ----------------------------
1260 -- Configuration Settings --
1261 ----------------------------
1263 -- These are settings that are used to establish the mode at the start of
1264 -- each unit. The values defined below can be affected either by command
1265 -- line switches, or by the use of appropriate configuration pragmas in the
1268 Ada_Version_Config : Ada_Version_Type;
1270 -- This is the value of the configuration switch for the Ada 83 mode, as
1271 -- set by the command line switches -gnat83/95/05, and possibly modified by
1272 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1273 -- to set the initial value for Ada_Version mode at the start of analysis
1274 -- of a unit. Note however, that the setting of this flag is ignored for
1275 -- internal and predefined units (which are always compiled in the most up
1276 -- to date version of Ada).
1278 Ada_Version_Explicit_Config : Ada_Version_Type;
1280 -- This is set in the same manner as Ada_Version_Config. The difference is
1281 -- that the setting of this flag is not ignored for internal and predefined
1282 -- units, which for some purposes do indeed access this value, regardless
1283 -- of the fact that they are compiled the the most up to date ada version).
1285 Assertions_Enabled_Config : Boolean;
1287 -- This is the value of the configuration switch for assertions enabled
1288 -- mode, as possibly set by the command line switch -gnata, and possibly
1289 -- modified by the use of the configuration pragma Assertion_Policy.
1291 Debug_Pragmas_Enabled_Config : Boolean;
1293 -- This is the value of the configuration switch for debug pragmas enabled
1294 -- mode, as possibly set by the command line switch -gnata and possibly
1295 -- modified by the use of the configuration pragma Debug_Policy.
1297 Dynamic_Elaboration_Checks_Config : Boolean := False;
1299 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1300 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1302 Exception_Locations_Suppressed_Config : Boolean := False;
1304 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1306 Extensions_Allowed_Config : Boolean;
1308 -- This is the flag that indicates whether extensions are allowed. It can
1309 -- be set True either by use of the -gnatX switch, or by use of the
1310 -- configuration pragma Extensions_Allowed (On). It is always set to True
1311 -- for internal GNAT units, since extensions are always permitted in such
1314 External_Name_Exp_Casing_Config : External_Casing_Type;
1316 -- This is the value of the configuration switch that controls casing of
1317 -- external symbols for which an explicit external name is given. It can be
1318 -- set to Uppercase by the command line switch -gnatF, and further modified
1319 -- by the use of the configuration pragma External_Name_Casing in the
1320 -- gnat.adc file. This flag is used to set the initial value for
1321 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1322 -- however that the setting of this flag is ignored for internal and
1323 -- predefined units (which are always compiled with As_Is mode).
1325 External_Name_Imp_Casing_Config : External_Casing_Type;
1327 -- This is the value of the configuration switch that controls casing of
1328 -- external symbols where the external name is implicitly given. It can be
1329 -- set to Uppercase by the command line switch -gnatF, and further modified
1330 -- by the use of the configuration pragma External_Name_Casing in the
1331 -- gnat.adc file. This flag is used to set the initial value for
1332 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1333 -- however that the setting of this flag is ignored for internal and
1334 -- predefined units (which are always compiled with Lowercase mode).
1336 Persistent_BSS_Mode_Config : Boolean;
1338 -- This is the value of the configuration switch that controls whether
1339 -- potentially persistent data is to be placed in the persistent_bss
1340 -- section. It can be set True by use of the pragma Persistent_BSS.
1341 -- This flag is used to set the initial value of Persistent_BSS_Mode
1342 -- at the start of each compilation unit, except that it is always
1343 -- set False for predefined units.
1345 Polling_Required_Config : Boolean;
1347 -- This is the value of the configuration switch that controls polling
1348 -- mode. It can be set True by the command line switch -gnatP, and then
1349 -- further modified by the use of pragma Polling in the gnat.adc file. This
1350 -- flag is used to set the initial value for Polling_Required at the start
1351 -- of analyzing each unit.
1353 Use_VADS_Size_Config : Boolean;
1355 -- This is the value of the configuration switch that controls the use of
1356 -- VADS_Size instead of Size whereever the attribute Size is used. It can
1357 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1358 -- This flag is used to set the initial value for Use_VADS_Size at the
1359 -- start of analyzing each unit. Note however that the setting of this flag
1360 -- is ignored for internal and predefined units (which are always compiled
1361 -- with the standard Size semantics).
1363 type Config_Switches_Type is private;
1364 -- Type used to save values of the switches set from Config values
1366 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1367 -- This procedure saves the current values of the switches which are
1368 -- initialized from the above Config values, and then resets these switches
1369 -- according to the Config value settings.
1371 procedure Set_Opt_Config_Switches
1372 (Internal_Unit : Boolean;
1373 Main_Unit : Boolean);
1374 -- This procedure sets the switches to the appropriate initial values. The
1375 -- parameter Internal_Unit is True for an internal or predefined unit, and
1376 -- affects the way the switches are set (see above). Main_Unit is true if
1377 -- switches are being set for the main unit (this affects setting of the
1378 -- assert/debug pragm switches, which are normally set false by default for
1379 -- an internal unit, except when the internal unit is the main unit, in
1380 -- which case we use the command line settings).
1382 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1383 -- This procedure restores a set of switch values previously saved by a
1384 -- call to Save_Opt_Switches.
1386 procedure Register_Opt_Config_Switches;
1387 -- This procedure is called after processing the gnat.adc file to record
1388 -- the values of the Config switches, as possibly modified by the use of
1389 -- command line switches and configuration pragmas.
1391 ------------------------
1392 -- Other Global Flags --
1393 ------------------------
1395 Static_Dispatch_Tables : constant Boolean;
1396 -- This flag indicates if the backend supports generation of statically
1397 -- allocated dispatch tables. If it is True, then the front end will
1398 -- generate static aggregates for dispatch tables that contain forward
1399 -- references to addresses of subprograms not seen yet, and the back end
1400 -- must be prepared to handle this case. If it is False, then the front
1401 -- end generates assignments to initialize the dispatch table, and there
1402 -- are no such forward references.
1404 Expander_Active : Boolean := False;
1405 -- A flag that indicates if expansion is active (True) or deactivated
1406 -- (False). When expansion is deactivated all calls to expander routines
1407 -- have no effect. Note that the initial setting of False is merely to
1408 -- prevent saving of an undefined value for an initial call to the
1409 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1410 -- this flag, see package Expander. Indeed this flag might more logically
1411 -- be in the spec of Expander, but it is referenced by Errout, and it
1412 -- really seems wrong for Errout to depend on Expander.
1414 -----------------------
1415 -- Tree I/O Routines --
1416 -----------------------
1418 procedure Tree_Read;
1419 -- Reads switch settings from current tree file using Tree_Read
1421 procedure Tree_Write;
1422 -- Writes out switch settings to current tree file using Tree_Write
1424 --------------------------
1425 -- ASIS Version Control --
1426 --------------------------
1428 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1429 -- are supposed to be used in the GNAT/ASIS version check performed in
1430 -- the ASIS code (this package is also a part of the ASIS implementation).
1431 -- They are set by Tree_Read procedure, so they represent the version
1432 -- number (and the version string) of the compiler which has created the
1433 -- tree, and they are supposed to be compared with the corresponding values
1434 -- from the Gnatvsn package which is a part of ASIS implementation.
1436 Tree_Version_String : String_Access;
1437 -- Used to store the compiler version string read from a tree file to check
1438 -- if it is from the same date as stored in the version string in Gnatvsn.
1439 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1440 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1441 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1442 -- of the corresponding source sets, using version strings that may be
1443 -- of different lengths.
1445 Tree_ASIS_Version_Number : Int;
1446 -- Used to store the ASIS version number read from a tree file to check if
1447 -- it is the same as stored in the ASIS version number in Gnatvsn.
1451 -- The following type is used to save and restore settings of switches in
1452 -- Opt that represent the configuration (i.e. result of config pragmas).
1454 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1455 -- flag that once set does not get reset, since the whole idea of this flag
1456 -- is to record the setting for the main unit.
1458 type Config_Switches_Type is record
1459 Ada_Version : Ada_Version_Type;
1460 Ada_Version_Explicit : Ada_Version_Type;
1461 Assertions_Enabled : Boolean;
1462 Debug_Pragmas_Enabled : Boolean;
1463 Dynamic_Elaboration_Checks : Boolean;
1464 Exception_Locations_Suppressed : Boolean;
1465 Extensions_Allowed : Boolean;
1466 External_Name_Exp_Casing : External_Casing_Type;
1467 External_Name_Imp_Casing : External_Casing_Type;
1468 Persistent_BSS_Mode : Boolean;
1469 Polling_Required : Boolean;
1470 Use_VADS_Size : Boolean;
1473 -- The following declarations are for GCC version dependent flags. We do
1474 -- not let client code in the compiler test GCC_Version directly, but
1475 -- instead use deferred constants for relevant feature tags.
1477 function get_gcc_version return Int;
1478 pragma Import (C, get_gcc_version, "get_gcc_version");
1480 GCC_Version : constant Nat := get_gcc_version;
1482 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
1483 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.
1485 Static_Dispatch_Tables : constant Boolean := GCC_Version >= 4;
1486 -- GCC version 4 can handle the static dispatch tables, but not version 3.
1487 -- Also we need -funit-at-a-time, which should also be tested here ???