1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2008, 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 -- Some flags are labelled "PROJECT MANAGER". These are used by tools that
40 -- use the Project Manager. These tools include gnatmake, gnatname, the gnat
41 -- driver, gnatclean, gprbuild and gprclean.
44 with Hostparm; use Hostparm;
45 with Types; use Types;
47 with System.Strings; use System.Strings;
48 with System.WCh_Con; use System.WCh_Con;
52 ----------------------------------------------
53 -- Settings of Modes for Current Processing --
54 ----------------------------------------------
56 -- The following mode values represent the current state of processing.
57 -- The values set here are the default values. Unless otherwise noted,
58 -- the value may be reset in Switch-? with an appropriate switch. In
59 -- some cases, the values can also be modified by pragmas, and in the
60 -- case of some binder variables, Gnatbind.Scan_Bind_Arg may modify
61 -- the default values.
63 Ada_Bind_File : Boolean := True;
65 -- Set True if binder file to be generated in Ada rather than C
67 type Ada_Version_Type is (Ada_83, Ada_95, Ada_05);
68 pragma Warnings (Off, Ada_Version_Type);
69 -- Versions of Ada for Ada_Version below. Note that these are ordered,
70 -- so that tests like Ada_Version >= Ada_95 are legitimate and useful.
71 -- The Warnings_Off pragma stops warnings for Ada_Version >= Ada_05,
72 -- which we want to allow, so that things work OK when Ada_15 is added!
73 -- This warning is now removed, so this pragma can be removed some time???
75 Ada_Version_Default : Ada_Version_Type := Ada_05;
77 -- Default Ada version if no switch given
79 Ada_Version : Ada_Version_Type := Ada_Version_Default;
81 -- Current Ada version for compiler, as set by configuration pragmas,
82 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
83 -- predefined or internal file is compiled.
85 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
87 -- Like Ada_Version, but does not get set implicitly for predefined
88 -- or internal units, so it reflects the Ada version explicitly set
89 -- using configuration pragmas or compiler switches (or if neither
90 -- appears, it remains set to Ada_Version_Default). This is used in
91 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
92 -- where in the run-time we want the explicit version set.
94 Ada_Version_Runtime : Ada_Version_Type := Ada_05;
96 -- Ada version used to compile the runtime. Used to set Ada_Version (but
97 -- not Ada_Version_Explicit) when compiling predefined or internal units.
99 Ada_Final_Suffix : constant String := "final";
100 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
102 -- The name of the procedure that performs the finalization at the end of
103 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
105 Ada_Init_Suffix : constant String := "init";
106 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
108 -- The name of the procedure that performs initialization at the start
109 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
111 Ada_Main_Name_Suffix : constant String := "main";
113 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
114 -- can be referenced in a uniform manner to create either the default
115 -- value of Ada_Main_Name (declared below), or the non-default name
116 -- set by Gnatbind.Scan_Bind_Arg.
118 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
120 -- The name of the Ada package generated by the binder (when in Ada mode).
121 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
123 Address_Clause_Overlay_Warnings : Boolean := True;
125 -- Set False to disable address clause warnings
127 Address_Is_Private : Boolean := False;
129 -- Set True if package System has the line "type Address is private;"
131 All_Errors_Mode : Boolean := False;
133 -- Flag set to force display of multiple errors on a single line and
134 -- also repeated error messages for references to undefined identifiers
135 -- and certain other repeated error messages. Set by use of -gnatf.
137 All_Sources : Boolean := False;
139 -- Set to True to require all source files to be present. This flag is
140 -- directly modified by gnatmake to affect the shared binder routines.
142 Alternate_Main_Name : String_Ptr := null;
144 -- Set to non null when Bind_Alternate_Main_Name is True. This value
145 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
147 Assertions_Enabled : Boolean := False;
149 -- Enable assertions made using pragma Assert
151 ASIS_Mode : Boolean := False;
153 -- Enable semantic checks and tree transformations that are important
154 -- for ASIS but that are usually skipped if Operating_Mode is set to
155 -- Check_Semantics. This flag does not have the corresponding option to set
156 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
157 -- from the code of GNSA-based tool (a client may need to set ON the
158 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
159 -- make very much sense, because GNSA cannot do back annotation).
161 Back_Annotate_Rep_Info : Boolean := False;
163 -- If set True, enables back annotation of representation information
164 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
165 -- (list representation information) or -gnatt (generate tree). It is
166 -- also set true if certain Unchecked_Conversion instantiations require
167 -- checking based on annotated values.
169 Bind_Alternate_Main_Name : Boolean := False;
171 -- True if main should be called Alternate_Main_Name.all.
172 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
174 Bind_Main_Program : Boolean := True;
176 -- Set to False if not binding main Ada program
178 Bind_For_Library : Boolean := False;
180 -- Set to True if the binder needs to generate a file designed for
181 -- building a library. May be set to True by Gnatbind.Scan_Bind_Arg.
183 Bind_Only : Boolean := False;
184 -- GNATMAKE, GPRMAKE, GPRBUILD
185 -- Set to True to skip compile and link steps
186 -- (except when Compile_Only and/or Link_Only are True).
188 Blank_Deleted_Lines : Boolean := False;
190 -- Output empty lines for each line of preprocessed input that is deleted
191 -- in the output, including preprocessor lines starting with a '#'.
193 Brief_Output : Boolean := False;
195 -- Force brief error messages to standard error, even if verbose mode is
196 -- set (so that main error messages go to standard output).
198 Build_Bind_And_Link_Full_Project : Boolean := False;
200 -- Set to True to build, bind and link all the sources of a project file
203 Check_Object_Consistency : Boolean := False;
204 -- GNATBIND, GNATMAKE
205 -- Set to True to check whether every object file is consistent with
206 -- its corresponding ada library information (ALI) file. An object
207 -- file is inconsistent with the corresponding ALI file if the object
208 -- file does not exist or if it has an older time stamp than the ALI file.
209 -- Default above is for GNATBIND. GNATMAKE overrides this default to
210 -- True (see Make.Initialize) since we normally do need to check source
211 -- consistencies in gnatmake.
213 Check_Only : Boolean := False;
215 -- Set to True to do checks only, no output of binder file
217 Check_Policy_List : Node_Id := Empty;
219 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
220 -- that are linked through the Next_Pragma fields, with the list being
221 -- terminated by Empty. The order is most recently processed first.
223 Check_Readonly_Files : Boolean := False;
225 -- Set to True to check readonly files during the make process
227 Check_Source_Files : Boolean := True;
228 -- GNATBIND, GNATMAKE
229 -- Set to True to enable consistency checking for any source files that
230 -- are present (i.e. date must match the date in the library info file).
231 -- Set to False for object file consistency check only. This flag is
232 -- directly modified by gnatmake, to affect the shared binder routines.
234 Check_Switches : Boolean := False;
235 -- GNATMAKE, GPRMAKE, GPBUILD
236 -- Set to True to check compiler options during the make process
238 Check_Unreferenced : Boolean := False;
240 -- Set to True to enable checking for unreferenced entities other
241 -- than formal parameters (for which see Check_Unreferenced_Formals)
243 Check_Unreferenced_Formals : Boolean := False;
245 -- Set True to check for unreferenced formals. This is turned on by
246 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
248 Check_Withs : Boolean := False;
250 -- Set to True to enable checking for unused withs, and also the case
251 -- of withing a package and using none of the entities in the package.
253 Commands_To_Stdout : Boolean := False;
255 -- True if echoed commands to be written to stdout instead of stderr
257 Comment_Deleted_Lines : Boolean := False;
259 -- True if source lines removed by the preprocessor should be commented
260 -- in the output file.
262 Compile_Only : Boolean := False;
263 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN
264 -- GNATMAKE, GPRMAKE, GPRMAKE:
265 -- set to True to skip bind and link steps (except when Bind_Only is
267 -- GNATCLEAN, GPRCLEAN:
268 -- set to True to delete only the files produced by the compiler but not
269 -- the library files or the executable files.
271 Config_File : Boolean := True;
273 -- Set to False to inhibit reading and processing of gnat.adc file
275 Config_File_Names : String_List_Access := null;
277 -- Names of configuration pragmas files (given by switches -gnatec)
279 Configurable_Run_Time_Mode : Boolean := False;
281 -- Set True if the compiler is operating in configurable run-time mode.
282 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
283 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
284 -- for details on the handling of the latter pragma.
286 Constant_Condition_Warnings : Boolean := False;
288 -- Set to True to activate warnings on constant conditions
290 Create_Mapping_File : Boolean := False;
292 -- Set to True (-C switch) to indicate that the compiler will be invoked
293 -- with a mapping file (-gnatem compiler switch).
295 Debug_Pragmas_Enabled : Boolean := False;
297 -- Enable debug statements from pragma Debug
299 subtype Debug_Level_Value is Nat range 0 .. 3;
300 Debugger_Level : Debug_Level_Value := 0;
302 -- The value given to the -g parameter. The default value for -g with
303 -- no value is 2. This is usually ignored by GNATBIND, except in the
304 -- VMS version where it is passed as an argument to __gnat_initialize
305 -- to trigger the activation of the remote debugging interface.
306 -- Is this still true ???
308 Debug_Generated_Code : Boolean := False;
310 -- Set True (-gnatD switch) to debug generated expanded code instead
311 -- of the original source code. Causes debugging information to be
312 -- written with respect to the generated code file that is written.
314 Default_Exit_Status : Int := 0;
316 -- Set the default exit status value. Set by the -Xnnn switch for the
319 Default_Stack_Size : Int := -1;
321 -- Set to default primary stack size in units of bytes. Set by
322 -- the -dnnn switch for the binder. A value of -1 indicates that no
323 -- default was set by the binder.
325 Default_Sec_Stack_Size : Int := -1;
327 -- Set to default secondary stack size in units of bytes. Set by
328 -- the -Dnnn switch for the binder. A value of -1 indicates that no
329 -- default was set by the binder, and that the default should be the
330 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
332 Detect_Blocking : Boolean := False;
334 -- Set True to force the run time to raise Program_Error if calls to
335 -- potentially blocking operations are detected from protected actions.
337 Display_Compilation_Progress : Boolean := False;
338 -- GNATMAKE, GPRMAKE, GPRBUILD
339 -- Set True (-d switch) to display information on progress while compiling
340 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
342 type Distribution_Stub_Mode_Type is
345 -- Normal mode, no generation/compilation of distribution stubs
347 Generate_Receiver_Stub_Body,
348 -- The unit being compiled is the RCI body, and the compiler will
349 -- generate the body for the receiver stubs and compile it.
351 Generate_Caller_Stub_Body);
352 -- The unit being compiled is the RCI spec, and the compiler will
353 -- generate the body for the caller stubs and compile it.
355 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
357 -- This enumeration variable indicates the five states of distribution
358 -- annex stub generation/compilation.
360 Do_Not_Execute : Boolean := False;
362 -- Set to True if no actual compilations should be undertaken.
364 Dump_Source_Text : Boolean := False;
366 -- Set to True (by -gnatL) to dump source text intermingled with generated
367 -- code. Effective only if either of Debug/Print_Generated_Code is true.
369 Dynamic_Elaboration_Checks : Boolean := False;
371 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
372 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
374 Dynamic_Stack_Measurement : Boolean := False;
376 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
378 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
380 -- Number of measurements we want to store during dynamic stack analysis.
381 -- When the buffer is full, non-storable results will be output on the fly.
382 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
383 -- by processing of -u flag for gnatbind.
385 Elab_Dependency_Output : Boolean := False;
387 -- Set to True to output complete list of elaboration constraints
389 Elab_Order_Output : Boolean := False;
391 -- Set to True to output chosen elaboration order
393 Elab_Warnings : Boolean := False;
395 -- Set to True to generate full elaboration warnings (-gnatwl)
397 Enable_Overflow_Checks : Boolean := False;
399 -- Set to True if -gnato (enable overflow checks) switch is set,
402 Error_Msg_Line_Length : Nat := 0;
404 -- Records the error message line length limit. If this is set to zero,
405 -- then we get the old style behavior, in which each call to the error
406 -- message routines generates one line of output as a separate message.
407 -- If it is set to a non-zero value, then continuation lines are folded
408 -- to make a single long message, and then this message is split up into
409 -- multiple lines not exceeding the specified length. Set by -gnatj=nn.
411 Exception_Locations_Suppressed : Boolean := False;
413 -- This flag is set True if a Suppress_Exception_Locations configuration
414 -- pragma is currently active.
416 type Exception_Mechanism_Type is
417 -- Determines the handling of exceptions. See Exp_Ch11 for details
419 (Front_End_Setjmp_Longjmp_Exceptions,
420 -- Exceptions use setjmp/longjmp generated explicitly by the
421 -- front end (this includes gigi or other equivalent parts of
422 -- the code generator). AT END handlers are converted into
423 -- exception handlers by the front end in this mode.
425 Back_End_Exceptions);
426 -- Exceptions are handled by the back end. The front end simply
427 -- generates the handlers as they appear in the source, and AT
428 -- END handlers are left untouched (they are not converted into
429 -- exception handlers when operating in this mode.
430 pragma Convention (C, Exception_Mechanism_Type);
432 Exception_Mechanism : Exception_Mechanism_Type :=
433 Front_End_Setjmp_Longjmp_Exceptions;
435 -- Set to the appropriate value depending on the default as given in
436 -- system.ads (ZCX_By_Default, GCC_ZCX_Support).
437 -- The C convention is there to make this variable accessible to gigi.
439 Exception_Tracebacks : Boolean := False;
441 -- Set to True to store tracebacks in exception occurrences (-E)
443 Extensions_Allowed : Boolean := False;
445 -- Set to True by switch -gnatX if GNAT specific language extensions
446 -- are allowed. For example, the use of 'Constrained with objects of
447 -- generic types is a GNAT extension.
449 type External_Casing_Type is (
450 As_Is, -- External names cased as they appear in the Ada source
451 Uppercase, -- External names forced to all uppercase letters
452 Lowercase); -- External names forced to all lowercase letters
454 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
456 -- The setting of this flag determines the casing of external names
457 -- when the name is implicitly derived from an entity name (i.e. either
458 -- no explicit External_Name or Link_Name argument is used, or, in the
459 -- case of extended DEC pragmas, the external name is given using an
460 -- identifier. The As_Is setting is not permitted here (since this would
461 -- create Ada source programs that were case sensitive).
463 External_Name_Exp_Casing : External_Casing_Type := As_Is;
465 -- The setting of this flag determines the casing of an external name
466 -- specified explicitly with a string literal. As_Is means the string
467 -- literal is used as given with no modification to the casing. If
468 -- Lowercase or Uppercase is set, then the string is forced to all
469 -- lowercase or all uppercase letters as appropriate. Note that this
470 -- setting has no effect if the external name is given using an identifier
471 -- in the case of extended DEC import/export pragmas (in this case the
472 -- casing is controlled by External_Name_Imp_Casing), and also has no
473 -- effect if an explicit Link_Name is supplied (a link name is always
474 -- used exactly as given).
476 External_Unit_Compilation_Allowed : Boolean := False;
478 -- When True (set by gnatmake switch -x), allow compilation of sources
479 -- that are not part of any project file.
481 Fast_Math : Boolean := False;
483 -- Indicates the current setting of Fast_Math mode, as set by the use
484 -- of a Fast_Math pragma (set on by Fast_Math (On)).
486 Float_Format : Character := ' ';
488 -- A non-blank value indicates that a Float_Format pragma has been
489 -- processed, in which case this variable is set to 'I' for IEEE or
490 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
493 Float_Format_Long : Character := ' ';
495 -- A non-blank value indicates that a Long_Float pragma has been
496 -- processed (this pragma is recognized only in OpenVMS versions
497 -- of GNAT), in which case this variable is set to D or G for
498 -- D_Float or G_Float.
500 Force_ALI_Tree_File : Boolean := False;
502 -- Force generation of ALI file even if errors are encountered.
503 -- Also forces generation of tree file if -gnatt is also set.
505 Force_Checking_Of_Elaboration_Flags : Boolean := False;
507 -- True if binding with forced checking of the elaboration flags
510 Force_Compilations : Boolean := False;
511 -- GNATMAKE, GPRMAKE, GPRBUILD
512 -- Set to force recompilations even when the objects are up-to-date.
514 Full_Path_Name_For_Brief_Errors : Boolean := False;
516 -- When True, in Brief_Output mode, each error message line
517 -- will start with the full path name of the source.
518 -- When False, only the file name without directory information
521 Full_List : Boolean := False;
523 -- Set True to generate full source listing with embedded errors
525 Full_List_File_Name : String_Ptr := null;
527 -- Set to file name to generate full source listing to named file (or if
528 -- the name is of the form .xxx, then to name.xxx where name is the source
529 -- file name with extension stripped.
531 Generate_Processed_File : Boolean := False;
533 -- True when switch -gnateG is used. When True, create in a file
534 -- <source>.prep, if the source is preprocessed.
536 Generating_Code : Boolean := False;
538 -- True if the frontend finished its work and has called the backend to
539 -- process the tree and generate the object file.
541 Global_Discard_Names : Boolean := False;
543 -- True if a pragma Discard_Names appeared as a configuration pragma for
544 -- the current compilation unit.
546 GNAT_Mode : Boolean := False;
548 -- True if compiling in GNAT system mode (-gnatg switch)
550 HLO_Active : Boolean := False;
552 -- True if High Level Optimizer is activated (-gnatH switch)
554 Identifier_Character_Set : Character;
556 -- This variable indicates the character set to be used for identifiers.
557 -- The possible settings are:
558 -- '1' Latin-5 (ISO-8859-1)
559 -- '2' Latin-5 (ISO-8859-2)
560 -- '3' Latin-5 (ISO-8859-3)
561 -- '4' Latin-5 (ISO-8859-4)
562 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
563 -- '9' Latin-5 (ISO-8859-9)
564 -- 'p' PC (US, IBM page 437)
565 -- '8' PC (European, IBM page 850)
566 -- 'f' Full upper set (all distinct)
567 -- 'n' No upper characters (Ada 83 rules)
568 -- 'w' Latin-1 plus wide characters allowed in identifiers
570 -- The setting affects the set of letters allowed in identifiers and the
571 -- upper/lower case equivalences. It does not affect the interpretation of
572 -- character and string literals, which are always stored using the actual
573 -- coding in the source program. This variable is initialized to the
574 -- default value appropriate to the system (in Osint.Initialize), and then
575 -- reset if a command line switch is used to change the setting.
577 Ignore_Rep_Clauses : Boolean := False;
579 -- Set True to ignore all representation clauses. Useful when compiling
580 -- code from foreign compilers for checking or ASIS purposes. Can be
581 -- set True by use of -gnatI.
583 Implementation_Unit_Warnings : Boolean := True;
585 -- Set True to active warnings for use of implementation internal units.
586 -- Can be controlled by use of -gnatwi/-gnatwI.
588 Implicit_Packing : Boolean := False;
590 -- If set True, then a Size attribute clause on an array is allowed to
591 -- cause implicit packing instead of generating an error message. Set by
592 -- use of pragma Implicit_Packing.
594 Ineffective_Inline_Warnings : Boolean := False;
596 -- Set True to activate warnings if front-end inlining (-gnatN) is not
597 -- able to actually inline a particular call (or all calls). Can be
598 -- controlled by use of -gnatwp/-gnatwP.
600 Init_Or_Norm_Scalars : Boolean := False;
602 -- Set True if a pragma Initialize_Scalars applies to the current unit.
603 -- Also set True if a pragma Normalize_Scalars applies.
605 Initialize_Scalars : Boolean := False;
607 -- Set True if a pragma Initialize_Scalars applies to the current unit.
608 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
610 Initialize_Scalars_Mode1 : Character := 'I';
611 Initialize_Scalars_Mode2 : Character := 'N';
613 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
614 -- is IN (invalid values), used if no -S switch is used.
616 Inline_Active : Boolean := False;
618 -- Set True to activate pragma Inline processing across modules. Default
619 -- for now is not to inline across module boundaries.
621 Interface_Library_Unit : Boolean := False;
623 -- Set to True to indicate that at least one ALI file is an interface ALI:
624 -- then elaboration flag checks are to be generated in the binder
627 Inspector_Mode : Boolean renames Debug.Debug_Flag_Dot_II;
629 -- True if compiling in inspector mode (-gnatd.I switch).
630 -- Only relevant when VM_Target /= None. The compiler will attempt to
631 -- generate code even in case of unsupported construct, so that the byte
632 -- code can be used by static analysis tools.
634 Invalid_Value_Used : Boolean := False;
636 -- Set True if a valid Invalid_Value attribute is encountered
638 Follow_Links_For_Files : Boolean := False;
640 -- Set to True (-eL) to process the project files in trusted mode
641 -- If Follow_Links is False, it is assumed that the project doesn't contain
642 -- any file duplicated through symbolic links (although the latter are
643 -- still valid if they point to a file which is outside of the project),
644 -- and that no directory has a name which is a valid source name.
646 Follow_Links_For_Dirs : Boolean := True;
648 -- Whether directories can be links in this project, and therefore
649 -- additional system calls should be performed to ensure we always see the
650 -- same full name for each directory.
652 Front_End_Inlining : Boolean := False;
654 -- Set True to activate inlining by front-end expansion
656 Inline_Processing_Required : Boolean := False;
658 -- Set True if inline processing is required. Inline processing is
659 -- required if an active Inline pragma is processed. The flag is set
660 -- for a pragma Inline or Inline_Always that is actually active.
662 In_Place_Mode : Boolean := False;
664 -- Set True to store ALI and object files in place i.e. in the object
665 -- directory if these files already exist or in the source directory
668 Keep_Going : Boolean := False;
669 -- GNATMAKE, GPRMAKE, GPRBUILD
670 -- When True signals to ignore compilation errors and keep
671 -- processing sources until there is no more work.
673 Keep_Temporary_Files : Boolean := False;
675 -- When True the temporary files created by the GNAT driver are not
676 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
678 Leap_Seconds_Support : Boolean := False;
680 -- Set to True to enable leap seconds support in Ada.Calendar and its
683 Link_Only : Boolean := False;
684 -- GNATMAKE, GPRMAKE, GPRBUILD
685 -- Set to True to skip compile and bind steps
686 -- (except when Bind_Only is set to True).
688 List_Restrictions : Boolean := False;
690 -- Set to True to list restrictions pragmas that could apply to partition
692 List_Units : Boolean := False;
694 -- List units in the active library for a compilation (-gnatu switch)
696 List_Closure : Boolean := False;
698 -- List all sources in the closure of a main (-R gnatbind switch)
700 List_Dependencies : Boolean := False;
702 -- When True gnatmake verifies that the objects are up to date and
703 -- outputs the list of object dependencies (-M switch).
704 -- Output depends if -a switch is used or not.
705 -- This list can be used directly in a Makefile.
707 List_Representation_Info : Int range 0 .. 3 := 0;
709 -- Set non-zero by -gnatR switch to list representation information.
710 -- The settings are as follows:
712 -- 0 = no listing of representation information (default as above)
713 -- 1 = list rep info for user defined record and array types
714 -- 2 = list rep info for all user defined types and objects
715 -- 3 = like 2, but variable fields are decoded symbolically
717 List_Representation_Info_To_File : Boolean := False;
719 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3
720 -- to be written to file.rep (where file is the name of the source
721 -- file) instead of stdout. For example, if file x.adb is compiled
722 -- using -gnatR2s then representation info is written to x.adb.ref.
724 List_Representation_Info_Mechanisms : Boolean := False;
726 -- Set true by -gnatRm switch. Causes information on mechanisms to
727 -- be included in the representation output information.
729 List_Preprocessing_Symbols : Boolean := False;
731 -- Set to True if symbols for preprocessing a source are to be listed
732 -- before preprocessing occurs. Set to True by switch -s of gnatprep
733 -- or -s in preprocessing data file for the compiler.
735 type Create_Repinfo_File_Proc is access procedure (Src : String);
736 type Write_Repinfo_Line_Proc is access procedure (Info : String);
737 type Close_Repinfo_File_Proc is access procedure;
738 -- Types used for procedure addresses below
740 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
741 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
742 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
744 -- These three locations are left null when operating in non-compiler
745 -- (e.g. ASIS mode), but when operating in compiler mode, they are
746 -- set to point to the three corresponding procedures in Osint-C. The
747 -- reason for this slightly strange interface is to prevent Repinfo
748 -- from dragging in Osint in ASIS mode, which would include a lot of
749 -- unwanted units in the ASIS build.
751 type Create_List_File_Proc is access procedure (S : String);
752 type Write_List_Info_Proc is access procedure (S : String);
753 type Close_List_File_Proc is access procedure;
754 -- Types used for procedure addresses below
756 Create_List_File_Access : Create_List_File_Proc := null;
757 Write_List_Info_Access : Write_List_Info_Proc := null;
758 Close_List_File_Access : Close_List_File_Proc := null;
760 -- These three locations are left null when operating in non-compiler
761 -- (e.g. from the binder), but when operating in compiler mode, they are
762 -- set to point to the three corresponding procedures in Osint-C. The
763 -- reason for this slightly strange interface is to prevent Repinfo
764 -- from dragging in Osint-C in the binder, which would include unwanted
765 -- units in the binder.
767 Locking_Policy : Character := ' ';
769 -- Set to ' ' for the default case (no locking policy specified).
770 -- Reset to first character (uppercase) of locking policy name if a
771 -- valid pragma Locking_Policy is encountered.
773 Locking_Policy_Sloc : Source_Ptr := No_Location;
775 -- Remember location of previous Locking_Policy pragma. This is used
776 -- for inconsistency error messages. A value of System_Location is
777 -- used if the policy is set in package System.
779 Look_In_Primary_Dir : Boolean := True;
780 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
781 -- Set to False if a -I- was present on the command line.
782 -- When True we are allowed to look in the primary directory to locate
783 -- other source or library files.
785 Make_Steps : Boolean := False;
787 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
790 Main_Index : Int := 0;
792 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
793 -- the main program is the nnn unit in a multi-unit source file.
795 Mapping_File_Name : String_Ptr := null;
797 -- File name of mapping between unit names, file names and path names.
798 -- (given by switch -gnatem)
800 Maximum_Errors : Int := 9999;
802 -- Maximum default number of errors before compilation is terminated.
803 -- Can be overridden using -gnatm (GNAT) or -m (GNATBIND) switch.
805 Maximum_File_Name_Length : Int;
807 -- Maximum number of characters allowed in a file name, not counting the
808 -- extension, as set by the appropriate switch. If no switch is given,
809 -- then this value is initialized by Osint to the appropriate value.
811 Maximum_Processes : Positive := 1;
812 -- GNATMAKE, GPRMAKE, GPRBUILD
813 -- Maximum number of processes that should be spawned to carry out
816 Minimal_Recompilation : Boolean := False;
818 -- Set to True if minimal recompilation mode requested
820 Special_Exception_Package_Used : Boolean := False;
822 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
823 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
824 -- local raise statements into gotos in the presence of either package.
826 Multiple_Unit_Index : Int;
828 -- This is set non-zero if the current unit is being compiled in multiple
829 -- unit per file mode, meaning that the current unit is selected from the
830 -- sequence of units in the current source file, using the value stored
831 -- in this variable (e.g. 2 = select second unit in file). A value of
832 -- zero indicates that we are in normal (one unit per file) mode.
834 No_Main_Subprogram : Boolean := False;
835 -- GNATMAKE, GNATBIND
836 -- Set to True if compilation/binding of a program without main
837 -- subprogram requested.
839 No_Run_Time_Mode : Boolean := False;
841 -- This flag is set True if a No_Run_Time pragma is encountered. See
842 -- spec of Rtsfind for a full description of handling of this pragma.
844 No_Stdinc : Boolean := False;
845 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
846 -- Set to True if no default source search dirs added to search list
848 No_Stdlib : Boolean := False;
849 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
850 -- Set to True if no default library search dirs added to search list
852 No_Strict_Aliasing : Boolean := False;
854 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
856 Normalize_Scalars : Boolean := False;
858 -- Set True if a pragma Normalize_Scalars applies to the current unit.
859 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
861 Object_Directory_Present : Boolean := False;
863 -- Set to True when an object directory is specified with option -D
865 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
866 Operating_Mode : Operating_Mode_Type := Generate_Code;
868 -- Indicates the operating mode of the compiler. The default is generate
869 -- code, which runs the parser, semantics and backend. Switches can be
870 -- used to set syntax checking only mode, or syntax and semantics checking
871 -- only mode. Operating_Mode can also be modified as a result of detecting
872 -- errors during the compilation process. In particular if any serious
873 -- error is detected then this flag is reset from Generate_Code to
874 -- Check_Semantics after generating an error message.
876 Optimize_Alignment : Character := 'O';
877 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can
878 -- be modified by use of pragma Optimize_Alignment.
880 Optimize_Alignment_Local : Boolean := False;
881 -- Set True if Optimize_Alignment mode is set by a local configuration
882 -- pragma that overrides the gnat.adc (or other configuration file) default
883 -- so that the unit is not dependent on the default setting. Also always
884 -- set True for internal units, since these always have a default setting
885 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to
886 -- them all having such an explicit pragma in each unit).
888 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
890 -- Indicates the original operating mode of the compiler as set by
891 -- compiler options. This is identical to Operating_Mode except that
892 -- this is not affected by errors.
894 Optimization_Level : Int;
895 pragma Import (C, Optimization_Level, "optimize");
896 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
898 Output_File_Name_Present : Boolean := False;
899 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
900 -- Set to True when the output C file name is given with option -o
901 -- for GNATBIND, when the object file name is given with option
902 -- -gnatO for GNAT or when the executable is given with option -o
903 -- for GNATMAKE or GPRMAKE.
905 Output_Linker_Option_List : Boolean := False;
907 -- True if output of list of linker options is requested (-K switch set)
909 Output_Object_List : Boolean := False;
911 -- True if output of list of objects is requested (-O switch set)
913 Overflow_Checks_Unsuppressed : Boolean := False;
915 -- Set to True if at least one pragma Unsuppress
916 -- (All_Checks|Overflow_Checks) has been processed.
918 Persistent_BSS_Mode : Boolean := False;
920 -- True if a Persistent_BSS configuration pragma is in effect, causing
921 -- potentially persistent data to be placed in the persistent_bss section.
923 Pessimistic_Elab_Order : Boolean := False;
925 -- True if pessimistic elaboration order is to be chosen (-p switch set)
927 Polling_Required : Boolean := False;
929 -- Set to True if polling for asynchronous abort is enabled by using
930 -- the -gnatP option for GNAT.
932 Preprocessing_Data_File : String_Ptr := null;
934 -- Set by switch -gnatep=. The file name of the preprocessing data file.
936 Print_Generated_Code : Boolean := False;
938 -- Set to True to enable output of generated code in source form. This
939 -- flag is set by the -gnatG switch.
941 Print_Standard : Boolean := False;
943 -- Set to true to enable printing of package standard in source form.
944 -- This flag is set by the -gnatS switch
946 Propagate_Exceptions : Boolean := False;
948 -- Indicates if subprogram descriptor exception tables should be
949 -- built for imported subprograms. Set True if a Propagate_Exceptions
950 -- pragma applies to the extended main unit.
952 type Usage is (Unknown, Not_In_Use, In_Use);
953 Project_File_In_Use : Usage := Unknown;
955 -- Indicates if a project file is used or not.
956 -- Set to In_Use by the first SFNP pragma.
958 Queuing_Policy : Character := ' ';
960 -- Set to ' ' for the default case (no queuing policy specified).
961 -- Reset to first character (uppercase) of locking policy name if a valid
962 -- Queuing_Policy pragma is encountered.
964 Queuing_Policy_Sloc : Source_Ptr := No_Location;
966 -- Remember location of previous Queuing_Policy pragma. This is used
967 -- for inconsistency error messages. A value of System_Location is
968 -- used if the policy is set in package System.
970 Quiet_Output : Boolean := False;
971 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN
972 -- Set to True if the tool should not have any output if there are no
973 -- errors or warnings.
975 Replace_In_Comments : Boolean := False;
977 -- Set to True if -C switch used
979 RTS_Lib_Path_Name : String_Ptr := null;
980 RTS_Src_Path_Name : String_Ptr := null;
982 -- Set to the "adalib" and "adainclude" directories of the run time
983 -- specified by --RTS=.
985 RTS_Switch : Boolean := False;
986 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
987 -- Set to True when the --RTS switch is set
989 Run_Path_Option : Boolean := True;
990 -- GNATMAKE, GNATLINK
991 -- Set to False when no run_path_option should be issued to the linker
993 Search_Directory_Present : Boolean := False;
995 -- Set to True when argument is -I. Reset to False when next argument,
996 -- a search directory path is taken into account. Note that this is
997 -- quite different from other switches in this section in that it is
998 -- only set in a transitory manner as a result of scanning a -I switch
999 -- with no file name, and if set, is an indication that the next argument
1000 -- is to be treated as a file name.
1002 Sec_Stack_Used : Boolean := False;
1004 -- Set True if generated code uses the System.Secondary_Stack package.
1005 -- For the binder, set if any unit uses the secondary stack package.
1007 Setup_Projects : Boolean := False;
1009 -- Set to True for GNAT SETUP: the Project Manager creates non existing
1010 -- object, library and exec directories.
1012 Shared_Libgnat : Boolean;
1014 -- Set to True if a shared libgnat is requested by using the -shared
1015 -- option for GNATBIND and to False when using the -static option. The
1016 -- value of this flag is set by Gnatbind.Scan_Bind_Arg.
1018 Stack_Checking_Enabled : Boolean;
1020 -- Set to indicate if -fstack-check switch is set for the compilation. True
1021 -- means that the switch is set, so that stack checking is enabled. False
1022 -- means that the switch is not set (no stack checking). This value is
1023 -- obtained from the external imported value flag_stack_check in the gcc
1024 -- backend (see Frontend) and may be referenced throughout the compilation
1027 Style_Check : Boolean := False;
1029 -- Set True to perform style checks. Activates checks carried out
1030 -- in package Style (see body of this package for details of checks)
1031 -- This flag is set True by either the -gnatg or -gnaty switches.
1033 Suppress_All_Inlining : Boolean := False;
1035 -- Set by -fno-inline. Suppresses all inlining, both front end and back end
1036 -- regardless of any other switches that are set.
1038 System_Extend_Pragma_Arg : Node_Id := Empty;
1040 -- Set non-empty if and only if a correct Extend_System pragma was present
1041 -- in which case it points to the argument of the pragma, and the name can
1042 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
1044 System_Extend_Unit : Node_Id := Empty;
1046 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
1047 -- is never appropriate in GNAT_Mode (and causes troubles, including
1048 -- bogus circularities, if we try to compile the run-time library with
1049 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
1050 -- is a copy of the value set in System_Extend_Pragma_Arg.
1052 Subunits_Missing : Boolean := False;
1054 -- This flag is set true if missing subunits are detected with code
1055 -- generation active. This causes code generation to be skipped.
1057 Suppress_Checks : Boolean := False;
1059 -- Set to True if -gnatp (suppress all checks) switch present.
1061 Suppress_Options : Suppress_Array;
1063 -- Flags set True to suppress corresponding check, i.e. add an implicit
1064 -- pragma Suppress at the outer level of each unit compiled. Note that
1065 -- these suppress actions can be overridden by the use of the Unsuppress
1066 -- pragma. This variable is initialized by Osint.Initialize.
1068 Suppress_Back_Annotation : Boolean := False;
1070 -- This flag is set True if back annotation of representation information
1071 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
1072 -- This avoids unnecessary time being spent on back annotation.
1074 Table_Factor : Int := 1;
1076 -- Factor by which all initial table sizes set in Alloc are multiplied.
1077 -- Used in Table to calculate initial table sizes (the initial table size
1078 -- is the value in Alloc, used as the Table_Initial parameter value,
1079 -- multiplied by the factor given here. The default value is used if no
1080 -- -gnatT switch appears.
1082 Task_Dispatching_Policy : Character := ' ';
1084 -- Set to ' ' for the default case (no task dispatching policy specified).
1085 -- Reset to first character (uppercase) of task dispatching policy name
1086 -- if a valid Task_Dispatching_Policy pragma is encountered.
1088 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
1090 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1091 -- used for inconsistency error messages. A value of System_Location is
1092 -- used if the policy is set in package System.
1094 Tasking_Used : Boolean := False;
1095 -- Set True if any tasking construct is encountered. Used to activate the
1096 -- output of the Q, L and T lines in ALI files.
1098 Time_Slice_Set : Boolean := False;
1100 -- Set True if a pragma Time_Slice is processed in the main unit, or
1101 -- if the -gnatTnn switch is present to set a time slice value.
1103 Time_Slice_Value : Nat;
1105 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1106 -- Time_Slice pragma has been processed. Set to the time slice value in
1107 -- microseconds. Negative values are stored as zero, and the value is not
1108 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1109 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1111 Tolerate_Consistency_Errors : Boolean := False;
1113 -- Tolerate time stamp and other consistency errors. If this flag is set to
1114 -- True (-t), then inconsistencies result in warnings rather than errors.
1116 Treat_Restrictions_As_Warnings : Boolean := False;
1118 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
1121 Tree_Output : Boolean := False;
1123 -- Set to True (-gnatt) to generate output tree file
1125 True_VMS_Target : Boolean := False;
1126 -- Set True if we are on a VMS target. The setting of this flag reflects
1127 -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which
1128 -- can also be true when debug flag m is set (-gnatdm). This is used in the
1129 -- few cases where we do NOT want -gnatdm to trigger the VMS behavior.
1131 Try_Semantics : Boolean := False;
1133 -- Flag set to force attempt at semantic analysis, even if parser errors
1134 -- occur. This will probably cause blowups at this stage in the game. On
1135 -- the other hand, most such blowups will be caught cleanly and simply
1136 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
1138 Undefined_Symbols_Are_False : Boolean := False;
1140 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1141 -- file for the compiler. Indicates that while preprocessing sources,
1142 -- symbols that are not defined have the value FALSE.
1144 Unique_Error_Tag : Boolean := Tag_Errors;
1146 -- Indicates if error messages are to be prefixed by the string error:
1147 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1149 Universal_Addressing_On_AAMP : Boolean := False;
1151 -- Indicates if library-level objects should be accessed and updated using
1152 -- universal addressing instructions on the AAMP architecture. This flag is
1153 -- set to True when pragma Universal_Data is given as a configuration
1156 Unreserve_All_Interrupts : Boolean := False;
1158 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1159 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1160 -- corresponding attribute set in GNATBIND.
1162 Upper_Half_Encoding : Boolean := False;
1164 -- Normally set False, indicating that upper half ISO 8859-1 characters are
1165 -- used in the normal way to represent themselves. If the wide character
1166 -- encoding method uses the upper bit for this encoding, then this flag is
1167 -- set True, and upper half characters in the source indicate the start of
1168 -- a wide character sequence. Set by -gnatW or -W switches.
1170 Usage_Requested : Boolean := False;
1171 -- GNAT, GNATBIND, GNATMAKE
1172 -- Set to True if -h (-gnath for the compiler) switch encountered
1173 -- requesting usage information
1175 Use_Pragma_Linker_Constructor : Boolean := False;
1177 -- True if pragma Linker_Constructor applies to adainit
1179 Use_VADS_Size : Boolean := False;
1181 -- Set to True if a valid pragma Use_VADS_Size is processed
1183 Validity_Checks_On : Boolean := True;
1185 -- This flag determines if validity checking is on or off. The initial
1186 -- state is on, and the required default validity checks are active. The
1187 -- actual set of checks that is performed if Validity_Checks_On is set is
1188 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1189 -- is controlled by pragma Validity_Checks (On | Off), and also some
1190 -- generated compiler code (typically code that has to do with validity
1191 -- check generation) is compiled with this flag set to False. This flag is
1192 -- set to False by the -gnatp switch.
1194 Verbose_Mode : Boolean := False;
1195 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1196 -- GPRMAKE, GPRBUILD, GPRCLEAN
1197 -- Set to True to get verbose mode (full error message text and location
1198 -- information sent to standard output, also header, copyright and summary)
1200 type Verbosity_Level_Type is (None, Low, Medium, High);
1201 Verbosity_Level : Verbosity_Level_Type := High;
1202 -- GNATMAKE, GPRMAKE
1203 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1204 -- the level of verbosity of informational messages:
1206 -- In Low Verbosity, the reasons why a source is recompiled, the name
1207 -- of the executable and the reason it must be rebuilt is output.
1209 -- In Medium Verbosity, additional lines are output for each ALI file
1212 -- In High Verbosity, additional lines are output when the ALI file
1213 -- is part of an Ada library, is read-only or is part of the runtime.
1215 Warn_On_Ada_2005_Compatibility : Boolean := True;
1217 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1218 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1219 -- mode. Set False by -gnatwY.
1221 Warn_On_Parameter_Order : Boolean := False;
1223 -- Set to True to generate warnings for cases where the argument list for
1224 -- a call is a sequence of identifiers that match the formal identifiers,
1225 -- but are in the wrong order.
1227 Warn_On_Assertion_Failure : Boolean := True;
1229 -- Set to True to activate warnings on assertions that can be determined
1230 -- at compile time will always fail. Set false by -gnatw.A.
1232 Warn_On_Assumed_Low_Bound : Boolean := True;
1234 -- Set to True to activate warnings for string parameters that are indexed
1235 -- with literals or S'Length, presumably assuming a lower bound of one. Set
1236 -- False by -gnatwW.
1238 Warn_On_Bad_Fixed_Value : Boolean := False;
1240 -- Set to True to generate warnings for static fixed-point expression
1241 -- values that are not an exact multiple of the small value of the type.
1243 Warn_On_Constant : Boolean := False;
1245 -- Set to True to generate warnings for variables that could be declared
1246 -- as constants. Modified by use of -gnatwk/K.
1248 Warn_On_Deleted_Code : Boolean := False;
1250 -- Set to True to generate warnings for code deleted by the front end
1251 -- for conditional statements whose outcome is known at compile time.
1252 -- Modified by use of -gnatwt/T.
1254 Warn_On_Dereference : Boolean := False;
1256 -- Set to True to generate warnings for implicit dereferences for array
1257 -- indexing and record component access. Modified by use of -gnatwd/D.
1259 Warn_On_Export_Import : Boolean := True;
1261 -- Set to True to generate warnings for suspicious use of export or
1262 -- import pragmas. Modified by use of -gnatwx/X.
1264 Warn_On_Hiding : Boolean := False;
1266 -- Set to True to generate warnings if a declared entity hides another
1267 -- entity. The default is that this warning is suppressed.
1269 Warn_On_Modified_Unread : Boolean := False;
1271 -- Set to True to generate warnings if a variable is assigned but is never
1272 -- read. Also controls warnings for similar cases involving out parameters,
1273 -- but only if there is only one out parameter for the procedure involved.
1274 -- The default is that this warning is suppressed.
1276 Warn_On_All_Unread_Out_Parameters : Boolean := False;
1278 -- Set to True to generate warnings in all cases where a variable is
1279 -- modified by being passed as to an OUT formal, but the resulting value is
1280 -- never read. The default is that this warning is suppressed, except in
1283 Warn_On_No_Value_Assigned : Boolean := True;
1285 -- Set to True to generate warnings if no value is ever assigned to a
1286 -- variable that is at least partially uninitialized. Set to false to
1287 -- suppress such warnings. The default is that such warnings are enabled.
1289 Warn_On_Non_Local_Exception : Boolean := False;
1291 -- Set to True to generate warnings for non-local exception raises and also
1292 -- handlers that can never handle a local raise. This warning is only ever
1293 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1294 -- default is not to generate the warnings even if the restriction is set.
1296 Warn_On_Obsolescent_Feature : Boolean := False;
1298 -- Set to True to generate warnings on use of any feature in Annex or if a
1299 -- subprogram is called for which a pragma Obsolescent applies.
1301 Warn_On_Questionable_Missing_Parens : Boolean := True;
1303 -- Set to True to generate warnings for cases where parentheses are missing
1304 -- and the usage is questionable, because the intent is unclear.
1306 Warn_On_Redundant_Constructs : Boolean := False;
1308 -- Set to True to generate warnings for redundant constructs (e.g. useless
1309 -- assignments/conversions). The default is that this warning is disabled.
1311 Warn_On_Object_Renames_Function : Boolean := False;
1313 -- Set to True to generate warnings when a function result is renamed as
1314 -- an object. The default is that this warning is disabled.
1316 Warn_On_Reverse_Bit_Order : Boolean := True;
1318 -- Set to True to generate warning (informational) messages for component
1319 -- clauses that are affected by non-standard bit-order. The default is
1320 -- that this warning is enabled.
1322 Warn_On_Unchecked_Conversion : Boolean := True;
1324 -- Set to True to generate warnings for unchecked conversions that may have
1325 -- non-portable semantics (e.g. because sizes of types differ). The default
1326 -- is that this warning is enabled.
1328 Warn_On_Unrecognized_Pragma : Boolean := True;
1330 -- Set to True to generate warnings for unrecognized pragmas. The default
1331 -- is that this warning is enabled.
1333 Warn_On_Unrepped_Components : Boolean := False;
1335 -- Set to True to generate warnings for the case of components of record
1336 -- which have a record representation clause but this component does not
1337 -- have a component clause. The default is that this warning is disabled.
1339 Warn_On_Warnings_Off : Boolean := False;
1341 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent),
1342 -- where either the pragma is never used, or it could be replaced by a
1343 -- pragma Unmodified or Unreferenced.
1345 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1346 Warning_Mode : Warning_Mode_Type := Normal;
1348 -- Controls treatment of warning messages. If set to Suppress, warning
1349 -- messages are not generated at all. In Normal mode, they are generated
1350 -- but do not count as errors. In Treat_As_Error mode, warning messages
1351 -- are generated and are treated as errors.
1353 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1355 -- Method used for encoding wide characters in the source program. See
1356 -- description of type in unit System.WCh_Con for a list of the methods
1357 -- that are currently supported. Note that brackets notation is always
1358 -- recognized in source programs regardless of the setting of this
1359 -- variable. The default setting causes only the brackets notation to be
1360 -- recognized. If this is the main unit, this setting also controls the
1361 -- output of the W=? parameter in the ALI file, which is used to provide
1362 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder,
1363 -- the value set here overrides this main unit default.
1365 Wide_Character_Encoding_Method_Specified : Boolean := False;
1367 -- Set True if the value in Wide_Character_Encoding_Method was set as
1368 -- a result of an explicit -gnatW? or -W? switch. False otherwise.
1370 Xref_Active : Boolean := True;
1372 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1374 Zero_Formatting : Boolean := False;
1376 -- Do no formatting (no title, no leading spaces, no empty lines) in
1377 -- auxiliary outputs (-e, -K, -l, -R).
1379 ----------------------------
1380 -- Configuration Settings --
1381 ----------------------------
1383 -- These are settings that are used to establish the mode at the start of
1384 -- each unit. The values defined below can be affected either by command
1385 -- line switches, or by the use of appropriate configuration pragmas in a
1386 -- configuration pragma file.
1388 Ada_Version_Config : Ada_Version_Type;
1390 -- This is the value of the configuration switch for the Ada 83 mode, as
1391 -- set by the command line switches -gnat83/95/05, and possibly modified by
1392 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1393 -- to set the initial value for Ada_Version mode at the start of analysis
1394 -- of a unit. Note however, that the setting of this flag is ignored for
1395 -- internal and predefined units (which are always compiled in the most up
1396 -- to date version of Ada).
1398 Ada_Version_Explicit_Config : Ada_Version_Type;
1400 -- This is set in the same manner as Ada_Version_Config. The difference is
1401 -- that the setting of this flag is not ignored for internal and predefined
1402 -- units, which for some purposes do indeed access this value, regardless
1403 -- of the fact that they are compiled the most up to date ada version).
1405 Assertions_Enabled_Config : Boolean;
1407 -- This is the value of the configuration switch for assertions enabled
1408 -- mode, as possibly set by the command line switch -gnata, and possibly
1409 -- modified by the use of the configuration pragma Assertion_Policy.
1411 Check_Policy_List_Config : Node_Id;
1413 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
1414 -- that are linked through the Next_Pragma fields, with the list being
1415 -- terminated by Empty. The order is most recently processed first. This
1416 -- list includes only those pragmas in configuration pragma files.
1418 Debug_Pragmas_Enabled_Config : Boolean;
1420 -- This is the value of the configuration switch for debug pragmas enabled
1421 -- mode, as possibly set by the command line switch -gnata and possibly
1422 -- modified by the use of the configuration pragma Debug_Policy.
1424 Dynamic_Elaboration_Checks_Config : Boolean := False;
1426 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1427 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1429 Exception_Locations_Suppressed_Config : Boolean := False;
1431 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1433 Extensions_Allowed_Config : Boolean;
1435 -- This is the flag that indicates whether extensions are allowed. It can
1436 -- be set True either by use of the -gnatX switch, or by use of the
1437 -- configuration pragma Extensions_Allowed (On). It is always set to True
1438 -- for internal GNAT units, since extensions are always permitted in such
1441 External_Name_Exp_Casing_Config : External_Casing_Type;
1443 -- This is the value of the configuration switch that controls casing of
1444 -- external symbols for which an explicit external name is given. It can be
1445 -- set to Uppercase by the command line switch -gnatF, and further modified
1446 -- by the use of the configuration pragma External_Name_Casing in the
1447 -- gnat.adc file. This flag is used to set the initial value for
1448 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1449 -- however that the setting of this flag is ignored for internal and
1450 -- predefined units (which are always compiled with As_Is mode).
1452 External_Name_Imp_Casing_Config : External_Casing_Type;
1454 -- This is the value of the configuration switch that controls casing of
1455 -- external symbols where the external name is implicitly given. It can be
1456 -- set to Uppercase by the command line switch -gnatF, and further modified
1457 -- by the use of the configuration pragma External_Name_Casing in the
1458 -- gnat.adc file. This flag is used to set the initial value for
1459 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1460 -- however that the setting of this flag is ignored for internal and
1461 -- predefined units (which are always compiled with Lowercase mode).
1463 Fast_Math_Config : Boolean;
1465 -- This is the value of the configuration switch that controls Fast_Math
1466 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is
1467 -- used to set the initial value of Fast_Math at the start of each new
1468 -- compilation unit.
1470 Optimize_Alignment_Config : Character;
1472 -- This is the value of the configuration switch that controls the
1473 -- alignment optimization mode, as set by an Optimize_Alignment pragma.
1474 -- It is used to set the initial value of Optimize_Alignment at the start
1475 -- of each new compilation unit, except that it is always set to 'O' (off)
1476 -- for internal units.
1478 Persistent_BSS_Mode_Config : Boolean;
1480 -- This is the value of the configuration switch that controls whether
1481 -- potentially persistent data is to be placed in the persistent_bss
1482 -- section. It can be set True by use of the pragma Persistent_BSS.
1483 -- This flag is used to set the initial value of Persistent_BSS_Mode
1484 -- at the start of each compilation unit, except that it is always
1485 -- set False for predefined units.
1487 Polling_Required_Config : Boolean;
1489 -- This is the value of the configuration switch that controls polling
1490 -- mode. It can be set True by the command line switch -gnatP, and then
1491 -- further modified by the use of pragma Polling in the gnat.adc file. This
1492 -- flag is used to set the initial value for Polling_Required at the start
1493 -- of analyzing each unit.
1495 Use_VADS_Size_Config : Boolean;
1497 -- This is the value of the configuration switch that controls the use of
1498 -- VADS_Size instead of Size wherever the attribute Size is used. It can
1499 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1500 -- This flag is used to set the initial value for Use_VADS_Size at the
1501 -- start of analyzing each unit. Note however that the setting of this flag
1502 -- is ignored for internal and predefined units (which are always compiled
1503 -- with the standard Size semantics).
1505 type Config_Switches_Type is private;
1506 -- Type used to save values of the switches set from Config values
1508 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1509 -- This procedure saves the current values of the switches which are
1510 -- initialized from the above Config values, and then resets these switches
1511 -- according to the Config value settings.
1513 procedure Set_Opt_Config_Switches
1514 (Internal_Unit : Boolean;
1515 Main_Unit : Boolean);
1516 -- This procedure sets the switches to the appropriate initial values. The
1517 -- parameter Internal_Unit is True for an internal or predefined unit, and
1518 -- affects the way the switches are set (see above). Main_Unit is true if
1519 -- switches are being set for the main unit (this affects setting of the
1520 -- assert/debug pragma switches, which are normally set false by default
1521 -- for an internal unit, except when the internal unit is the main unit,
1522 -- in which case we use the command line settings).
1524 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1525 -- This procedure restores a set of switch values previously saved by a
1526 -- call to Save_Opt_Switches.
1528 procedure Register_Opt_Config_Switches;
1529 -- This procedure is called after processing the gnat.adc file and other
1530 -- configuration pragma files to record the values of the Config switches,
1531 -- as possibly modified by the use of command line switches and pragmas
1532 -- appearing in these files.
1534 ------------------------
1535 -- Other Global Flags --
1536 ------------------------
1538 Expander_Active : Boolean := False;
1539 -- A flag that indicates if expansion is active (True) or deactivated
1540 -- (False). When expansion is deactivated all calls to expander routines
1541 -- have no effect. Note that the initial setting of False is merely to
1542 -- prevent saving of an undefined value for an initial call to the
1543 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1544 -- this flag, see package Expander. Indeed this flag might more logically
1545 -- be in the spec of Expander, but it is referenced by Errout, and it
1546 -- really seems wrong for Errout to depend on Expander.
1548 Static_Dispatch_Tables : Boolean := True;
1549 -- This flag indicates if the backend supports generation of statically
1550 -- allocated dispatch tables. If it is True, then the front end will
1551 -- generate static aggregates for dispatch tables that contain forward
1552 -- references to addresses of subprograms not seen yet, and the back end
1553 -- must be prepared to handle this case. If it is False, then the front
1554 -- end generates assignments to initialize the dispatch table, and there
1555 -- are no such forward references. By default we build statically allocated
1556 -- dispatch tables for all library level tagged types in all platforms.This
1557 -- behavior can be disabled using switch -gnatd.t which will set this flag
1558 -- to False and revert to the previous dynamic behavior.
1560 -----------------------
1561 -- Tree I/O Routines --
1562 -----------------------
1564 procedure Tree_Read;
1565 -- Reads switch settings from current tree file using Tree_Read
1567 procedure Tree_Write;
1568 -- Writes out switch settings to current tree file using Tree_Write
1570 --------------------------
1571 -- ASIS Version Control --
1572 --------------------------
1574 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1575 -- are supposed to be used in the GNAT/ASIS version check performed in
1576 -- the ASIS code (this package is also a part of the ASIS implementation).
1577 -- They are set by Tree_Read procedure, so they represent the version
1578 -- number (and the version string) of the compiler which has created the
1579 -- tree, and they are supposed to be compared with the corresponding values
1580 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS
1583 Tree_Version_String : String_Access;
1584 -- Used to store the compiler version string read from a tree file to check
1585 -- if it is from the same date as stored in the version string in Gnatvsn.
1586 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1587 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1588 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1589 -- of the corresponding source sets, using version strings that may be
1590 -- of different lengths.
1592 Tree_ASIS_Version_Number : Int;
1593 -- Used to store the ASIS version number read from a tree file to check if
1594 -- it is the same as stored in the ASIS version number in Tree_IO.
1598 -- The following type is used to save and restore settings of switches in
1599 -- Opt that represent the configuration (i.e. result of config pragmas).
1601 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1602 -- flag that once set does not get reset, since the whole idea of this flag
1603 -- is to record the setting for the main unit.
1605 type Config_Switches_Type is record
1606 Ada_Version : Ada_Version_Type;
1607 Ada_Version_Explicit : Ada_Version_Type;
1608 Assertions_Enabled : Boolean;
1609 Check_Policy_List : Node_Id;
1610 Debug_Pragmas_Enabled : Boolean;
1611 Dynamic_Elaboration_Checks : Boolean;
1612 Exception_Locations_Suppressed : Boolean;
1613 Extensions_Allowed : Boolean;
1614 External_Name_Exp_Casing : External_Casing_Type;
1615 External_Name_Imp_Casing : External_Casing_Type;
1616 Fast_Math : Boolean;
1617 Optimize_Alignment : Character;
1618 Optimize_Alignment_Local : Boolean;
1619 Persistent_BSS_Mode : Boolean;
1620 Polling_Required : Boolean;
1621 Use_VADS_Size : Boolean;
1624 -- The following declarations are for GCC version dependent flags. We do
1625 -- not let client code in the compiler test GCC_Version directly, but
1626 -- instead use deferred constants for relevant feature tags.
1628 -- Note: there currently are no such constants defined in this section,
1629 -- since the compiler front end is currently entirely independent of the
1630 -- GCC version, which is a desirable state of affairs.
1632 function get_gcc_version return Int;
1633 pragma Import (C, get_gcc_version, "get_gcc_version");
1635 GCC_Version : constant Nat := get_gcc_version;
1637 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
1638 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.