1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2010, 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 3, 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. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 -- This package contains global flags set by the initialization routine from
33 -- the command line and referenced throughout the compiler, the binder, or
34 -- other GNAT tools. The comments indicate which options are used by which
35 -- programs (GNAT, GNATBIND, GNATLINK, GNATMAKE, GPRMAKE, etc).
37 -- Some flags are labelled "PROJECT MANAGER". These are used by tools that
38 -- use the Project Manager. These tools include gnatmake, gnatname, the gnat
39 -- driver, gnatclean, gprbuild and gprclean.
41 with Hostparm; use Hostparm;
42 with Types; use Types;
44 pragma Warnings (Off);
45 -- This package is used also by gnatcoll
46 with System.Strings; use System.Strings;
47 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, Ada_12);
68 pragma Ordered (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.
72 Ada_2005 : Ada_Version_Type renames Ada_05;
73 Ada_2012 : Ada_Version_Type renames Ada_12;
74 -- Renamings with full names (preferred usage)
76 Ada_Version_Default : constant Ada_Version_Type := Ada_05;
77 pragma Warnings (Off, Ada_Version_Default);
79 -- Default Ada version if no switch given. The Warnings off is to kill
80 -- constant condition warnings.
82 Ada_Version : Ada_Version_Type := Ada_Version_Default;
84 -- Current Ada version for compiler, as set by configuration pragmas,
85 -- compiler switches, or implicitly (to Ada_Version_Runtime) when a
86 -- predefined or internal file is compiled.
88 Ada_Version_Explicit : Ada_Version_Type := Ada_Version_Default;
90 -- Like Ada_Version, but does not get set implicitly for predefined
91 -- or internal units, so it reflects the Ada version explicitly set
92 -- using configuration pragmas or compiler switches (or if neither
93 -- appears, it remains set to Ada_Version_Default). This is used in
94 -- the rare cases (notably for pragmas Preelaborate_05 and Pure_05)
95 -- where in the run-time we want the explicit version set.
97 Ada_Version_Runtime : Ada_Version_Type := Ada_12;
99 -- Ada version used to compile the runtime. Used to set Ada_Version (but
100 -- not Ada_Version_Explicit) when compiling predefined or internal units.
102 Ada_Final_Suffix : constant String := "final";
103 Ada_Final_Name : String_Ptr := new String'("ada" & Ada_Final_Suffix);
105 -- The name of the procedure that performs the finalization at the end of
106 -- execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
108 Ada_Init_Suffix : constant String := "init";
109 Ada_Init_Name : String_Ptr := new String'("ada" & Ada_Init_Suffix);
111 -- The name of the procedure that performs initialization at the start
112 -- of execution. This variable may be modified by Gnatbind.Scan_Bind_Arg.
114 Ada_Main_Name_Suffix : constant String := "main";
116 -- The suffix for Ada_Main_Name. Defined as a constant here so that it
117 -- can be referenced in a uniform manner to create either the default
118 -- value of Ada_Main_Name (declared below), or the non-default name
119 -- set by Gnatbind.Scan_Bind_Arg.
121 Ada_Main_Name : String_Ptr := new String'("ada_" & Ada_Main_Name_Suffix);
123 -- The name of the Ada package generated by the binder (when in Ada mode).
124 -- This variable may be modified by Gnatbind.Scan_Bind_Arg.
126 Address_Clause_Overlay_Warnings : Boolean := True;
128 -- Set False to disable address clause warnings
130 Address_Is_Private : Boolean := False;
132 -- Set True if package System has the line "type Address is private;"
134 All_Errors_Mode : Boolean := False;
136 -- Flag set to force display of multiple errors on a single line and
137 -- also repeated error messages for references to undefined identifiers
138 -- and certain other repeated error messages. Set by use of -gnatf.
140 All_Sources : Boolean := False;
142 -- Set to True to require all source files to be present. This flag is
143 -- directly modified by gnatmake to affect the shared binder routines.
145 Alternate_Main_Name : String_Ptr := null;
147 -- Set to non null when Bind_Alternate_Main_Name is True. This value
148 -- is modified as needed by Gnatbind.Scan_Bind_Arg.
150 ASIS_Mode : Boolean := False;
152 -- Enable semantic checks and tree transformations that are important
153 -- for ASIS but that are usually skipped if Operating_Mode is set to
154 -- Check_Semantics. This flag does not have the corresponding option to set
155 -- it ON. It is set ON when Tree_Output is set ON, it can also be set ON
156 -- from the code of GNSA-based tool (a client may need to set ON the
157 -- Back_Annotate_Rep_Info flag in this case. At the moment this does not
158 -- make very much sense, because GNSA cannot do back annotation).
160 Assertions_Enabled : Boolean := False;
162 -- Enable assertions made using pragma Assert
164 Assume_No_Invalid_Values : Boolean := False;
166 -- Normally, in accordance with (RM 13.9.1 (9-11)) the front end assumes
167 -- that values could have invalid representations, unless it can clearly
168 -- prove that the values are valid. If this switch is set (by -gnatB or by
169 -- pragma Assume_No_Invalid_Values (Off)), then the compiler assumes values
170 -- are valid and in range of their representations. This feature is now
171 -- fully enabled in the compiler.
173 Back_Annotate_Rep_Info : Boolean := False;
175 -- If set True, enables back annotation of representation information
176 -- by gigi, even in -gnatc mode. This is set True by the use of -gnatR
177 -- (list representation information) or -gnatt (generate tree). It is
178 -- also set true if certain Unchecked_Conversion instantiations require
179 -- checking based on annotated values.
181 Back_End_Handles_Limited_Types : Boolean;
182 -- This flag is set true if the back end can properly handle limited or
183 -- other by reference types, and avoid copies. If this flag is False, then
184 -- the front end does special expansion for conditional expressions to make
185 -- sure that no copy occurs. If the flag is True, then the expansion for
186 -- conditional expressions relies on the back end properly handling things.
187 -- Currently the default is False for all cases (set in gnat1drv). The
188 -- default can be modified using -gnatd.L (sets the flag True).
190 Bind_Alternate_Main_Name : Boolean := False;
192 -- True if main should be called Alternate_Main_Name.all.
193 -- This variable may be set to True by Gnatbind.Scan_Bind_Arg.
195 Bind_Main_Program : Boolean := True;
197 -- Set to False if not binding main Ada program
199 Bind_For_Library : Boolean := False;
201 -- Set to True if the binder needs to generate a file designed for building
202 -- a library. May be set to True by Gnatbind.Scan_Bind_Arg.
204 Bind_Only : Boolean := False;
205 -- GNATMAKE, GPRMAKE, GPRBUILD
206 -- Set to True to skip compile and link steps
207 -- (except when Compile_Only and/or Link_Only are True).
209 Blank_Deleted_Lines : Boolean := False;
211 -- Output empty lines for each line of preprocessed input that is deleted
212 -- in the output, including preprocessor lines starting with a '#'.
214 Brief_Output : Boolean := False;
216 -- Force brief error messages to standard error, even if verbose mode is
217 -- set (so that main error messages go to standard output).
219 Build_Bind_And_Link_Full_Project : Boolean := False;
221 -- Set to True to build, bind and link all the sources of a project file
224 Check_Object_Consistency : Boolean := False;
225 -- GNATBIND, GNATMAKE
226 -- Set to True to check whether every object file is consistent with
227 -- its corresponding ada library information (ALI) file. An object
228 -- file is inconsistent with the corresponding ALI file if the object
229 -- file does not exist or if it has an older time stamp than the ALI file.
230 -- Default above is for GNATBIND. GNATMAKE overrides this default to
231 -- True (see Make.Initialize) since we normally do need to check source
232 -- consistencies in gnatmake.
234 Check_Only : Boolean := False;
236 -- Set to True to do checks only, no output of binder file
238 Check_Policy_List : Node_Id := Empty;
240 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
241 -- that are linked through the Next_Pragma fields, with the list being
242 -- terminated by Empty. The order is most recently processed first. Note
243 -- that Push_Scope and Pop_Scope in Sem_Ch8 save and restore the value
244 -- of this variable, implementing the required scope control for pragmas
245 -- appearing a declarative part.
247 Check_Readonly_Files : Boolean := False;
249 -- Set to True to check readonly files during the make process
251 Check_Source_Files : Boolean := True;
252 -- GNATBIND, GNATMAKE
253 -- Set to True to enable consistency checking for any source files that
254 -- are present (i.e. date must match the date in the library info file).
255 -- Set to False for object file consistency check only. This flag is
256 -- directly modified by gnatmake, to affect the shared binder routines.
258 Check_Switches : Boolean := False;
259 -- GNATMAKE, GPRMAKE, GPBUILD
260 -- Set to True to check compiler options during the make process
262 Check_Unreferenced : Boolean := False;
264 -- Set to True to enable checking for unreferenced entities other
265 -- than formal parameters (for which see Check_Unreferenced_Formals)
267 Check_Unreferenced_Formals : Boolean := False;
269 -- Set True to check for unreferenced formals. This is turned on by
270 -- -gnatwa/wf/wu and turned off by -gnatwA/wF/wU.
272 Check_Withs : Boolean := False;
274 -- Set to True to enable checking for unused withs, and also the case
275 -- of withing a package and using none of the entities in the package.
277 CodePeer_Mode : Boolean := False;
279 -- Enable full CodePeer mode (SCIL generation, disable switches that
280 -- interact badly with it, etc...).
282 Commands_To_Stdout : Boolean := False;
284 -- True if echoed commands to be written to stdout instead of stderr
286 Comment_Deleted_Lines : Boolean := False;
288 -- True if source lines removed by the preprocessor should be commented
289 -- in the output file.
291 Compile_Only : Boolean := False;
292 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPBUILD, GPRCLEAN
293 -- GNATMAKE, GPRMAKE, GPRMAKE:
294 -- set to True to skip bind and link steps (except when Bind_Only is
296 -- GNATCLEAN, GPRCLEAN:
297 -- set to True to delete only the files produced by the compiler but not
298 -- the library files or the executable files.
300 Config_File : Boolean := True;
302 -- Set to False to inhibit reading and processing of gnat.adc file
304 Config_File_Names : String_List_Access := null;
306 -- Names of configuration pragmas files (given by switches -gnatec)
308 Configurable_Run_Time_Mode : Boolean := False;
310 -- Set True if the compiler is operating in configurable run-time mode.
311 -- This happens if the flag Targparm.Configurable_Run_TimeMode_On_Target
312 -- is set True, or if pragma No_Run_Time is used. See the spec of Rtsfind
313 -- for details on the handling of the latter pragma.
315 Constant_Condition_Warnings : Boolean := False;
317 -- Set to True to activate warnings on constant conditions
319 Create_Mapping_File : Boolean := False;
321 -- Set to True (-C switch) to indicate that the compiler will be invoked
322 -- with a mapping file (-gnatem compiler switch).
324 Debug_Pragmas_Enabled : Boolean := False;
326 -- Enable debug statements from pragma Debug
328 subtype Debug_Level_Value is Nat range 0 .. 3;
329 Debugger_Level : Debug_Level_Value := 0;
331 -- The value given to the -g parameter. The default value for -g with
332 -- no value is 2. This is usually ignored by GNATBIND, except in the
333 -- VMS version where it is passed as an argument to __gnat_initialize
334 -- to trigger the activation of the remote debugging interface.
335 -- Is this still true ???
337 Debug_Generated_Code : Boolean := False;
339 -- Set True (-gnatD switch) to debug generated expanded code instead
340 -- of the original source code. Causes debugging information to be
341 -- written with respect to the generated code file that is written.
343 Default_Exit_Status : Int := 0;
345 -- Set the default exit status value. Set by the -Xnnn switch for the
348 Default_Stack_Size : Int := -1;
350 -- Set to default primary stack size in units of bytes. Set by
351 -- the -dnnn switch for the binder. A value of -1 indicates that no
352 -- default was set by the binder.
354 Default_Sec_Stack_Size : Int := -1;
356 -- Set to default secondary stack size in units of bytes. Set by
357 -- the -Dnnn switch for the binder. A value of -1 indicates that no
358 -- default was set by the binder, and that the default should be the
359 -- initial value of System.Secondary_Stack.Default_Secondary_Stack_Size.
361 Detect_Blocking : Boolean := False;
363 -- Set True to force the run time to raise Program_Error if calls to
364 -- potentially blocking operations are detected from protected actions.
366 Display_Compilation_Progress : Boolean := False;
367 -- GNATMAKE, GPRMAKE, GPRBUILD
368 -- Set True (-d switch) to display information on progress while compiling
369 -- files. Internal flag to be used in conjunction with an IDE (e.g GPS).
371 type Distribution_Stub_Mode_Type is
374 -- Normal mode, no generation/compilation of distribution stubs
376 Generate_Receiver_Stub_Body,
377 -- The unit being compiled is the RCI body, and the compiler will
378 -- generate the body for the receiver stubs and compile it.
380 Generate_Caller_Stub_Body);
381 -- The unit being compiled is the RCI spec, and the compiler will
382 -- generate the body for the caller stubs and compile it.
384 Distribution_Stub_Mode : Distribution_Stub_Mode_Type := No_Stubs;
386 -- This enumeration variable indicates the five states of distribution
387 -- annex stub generation/compilation.
389 Do_Not_Execute : Boolean := False;
391 -- Set to True if no actual compilations should be undertaken.
393 Dump_Source_Text : Boolean := False;
395 -- Set to True (by -gnatL) to dump source text intermingled with generated
396 -- code. Effective only if either of Debug/Print_Generated_Code is true.
398 Dynamic_Elaboration_Checks : Boolean := False;
400 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
401 -- switch or by the use of pragma Elaboration_Checks (Dynamic).
403 Dynamic_Stack_Measurement : Boolean := False;
405 -- Set True to enable dynamic stack measurement (-u flag for gnatbind)
407 Dynamic_Stack_Measurement_Array_Size : Nat := 100;
409 -- Number of measurements we want to store during dynamic stack analysis.
410 -- When the buffer is full, non-storable results will be output on the fly.
411 -- The value is relevant only if Dynamic_Stack_Measurement is set. Set
412 -- by processing of -u flag for gnatbind.
414 Elab_Dependency_Output : Boolean := False;
416 -- Set to True to output complete list of elaboration constraints
418 Elab_Order_Output : Boolean := False;
420 -- Set to True to output chosen elaboration order
422 Elab_Warnings : Boolean := False;
424 -- Set to True to generate full elaboration warnings (-gnatwl)
426 Enable_Overflow_Checks : Boolean := False;
428 -- Set to True if -gnato (enable overflow checks) switch is set,
431 Error_Msg_Line_Length : Nat := 0;
433 -- Records the error message line length limit. If this is set to zero,
434 -- then we get the old style behavior, in which each call to the error
435 -- message routines generates one line of output as a separate message.
436 -- If it is set to a non-zero value, then continuation lines are folded
437 -- to make a single long message, and then this message is split up into
438 -- multiple lines not exceeding the specified length. Set by -gnatj=nn.
440 Exception_Handler_Encountered : Boolean := False;
442 -- This flag is set true if the parser encounters an exception handler.
443 -- It is used to set Warn_On_Exception_Propagation True if the restriction
444 -- No_Exception_Propagation is set.
446 Exception_Locations_Suppressed : Boolean := False;
448 -- This flag is set True if a Suppress_Exception_Locations configuration
449 -- pragma is currently active.
451 type Exception_Mechanism_Type is
452 -- Determines the handling of exceptions. See Exp_Ch11 for details
454 (Front_End_Setjmp_Longjmp_Exceptions,
455 -- Exceptions use setjmp/longjmp generated explicitly by the
456 -- front end (this includes gigi or other equivalent parts of
457 -- the code generator). AT END handlers are converted into
458 -- exception handlers by the front end in this mode.
460 Back_End_Exceptions);
461 -- Exceptions are handled by the back end. The front end simply
462 -- generates the handlers as they appear in the source, and AT
463 -- END handlers are left untouched (they are not converted into
464 -- exception handlers when operating in this mode.
465 pragma Convention (C, Exception_Mechanism_Type);
467 Exception_Mechanism : Exception_Mechanism_Type :=
468 Front_End_Setjmp_Longjmp_Exceptions;
470 -- Set to the appropriate value depending on the default as given in
471 -- system.ads (ZCX_By_Default, GCC_ZCX_Support). The C convention is there
472 -- to make this variable accessible to gigi.
474 Exception_Tracebacks : Boolean := False;
476 -- Set to True to store tracebacks in exception occurrences (-E)
478 Extensions_Allowed : Boolean := False;
480 -- Set to True by switch -gnatX if GNAT specific language extensions
481 -- are allowed. For example, the use of 'Constrained with objects of
482 -- generic types is a GNAT extension.
484 type External_Casing_Type is (
485 As_Is, -- External names cased as they appear in the Ada source
486 Uppercase, -- External names forced to all uppercase letters
487 Lowercase); -- External names forced to all lowercase letters
489 External_Name_Imp_Casing : External_Casing_Type := Lowercase;
491 -- The setting of this flag determines the casing of external names
492 -- when the name is implicitly derived from an entity name (i.e. either
493 -- no explicit External_Name or Link_Name argument is used, or, in the
494 -- case of extended DEC pragmas, the external name is given using an
495 -- identifier. The As_Is setting is not permitted here (since this would
496 -- create Ada source programs that were case sensitive).
498 External_Name_Exp_Casing : External_Casing_Type := As_Is;
500 -- The setting of this flag determines the casing of an external name
501 -- specified explicitly with a string literal. As_Is means the string
502 -- literal is used as given with no modification to the casing. If
503 -- Lowercase or Uppercase is set, then the string is forced to all
504 -- lowercase or all uppercase letters as appropriate. Note that this
505 -- setting has no effect if the external name is given using an identifier
506 -- in the case of extended DEC import/export pragmas (in this case the
507 -- casing is controlled by External_Name_Imp_Casing), and also has no
508 -- effect if an explicit Link_Name is supplied (a link name is always
509 -- used exactly as given).
511 External_Unit_Compilation_Allowed : Boolean := False;
513 -- When True (set by gnatmake switch -x), allow compilation of sources
514 -- that are not part of any project file.
516 Fast_Math : Boolean := False;
518 -- Indicates the current setting of Fast_Math mode, as set by the use
519 -- of a Fast_Math pragma (set on by Fast_Math (On)).
521 Float_Format : Character := ' ';
523 -- A non-blank value indicates that a Float_Format pragma has been
524 -- processed, in which case this variable is set to 'I' for IEEE or
525 -- to 'V' for VAX. The setting of 'V' is only possible on OpenVMS
528 Float_Format_Long : Character := ' ';
530 -- A non-blank value indicates that a Long_Float pragma has been
531 -- processed (this pragma is recognized only in OpenVMS versions
532 -- of GNAT), in which case this variable is set to D or G for
533 -- D_Float or G_Float.
535 Force_ALI_Tree_File : Boolean := False;
537 -- Force generation of ALI file even if errors are encountered.
538 -- Also forces generation of tree file if -gnatt is also set.
540 Force_Checking_Of_Elaboration_Flags : Boolean := False;
542 -- True if binding with forced checking of the elaboration flags
545 Force_Compilations : Boolean := False;
546 -- GNATMAKE, GPRMAKE, GPRBUILD
547 -- Set to force recompilations even when the objects are up-to-date.
549 Full_Path_Name_For_Brief_Errors : Boolean := False;
551 -- When True, in Brief_Output mode, each error message line
552 -- will start with the full path name of the source.
553 -- When False, only the file name without directory information
556 Full_List : Boolean := False;
558 -- Set True to generate full source listing with embedded errors
560 Full_List_File_Name : String_Ptr := null;
562 -- Set to file name to generate full source listing to named file (or if
563 -- the name is of the form .xxx, then to name.xxx where name is the source
564 -- file name with extension stripped.
566 Generate_Processed_File : Boolean := False;
568 -- True when switch -gnateG is used. When True, create in a file
569 -- <source>.prep, if the source is preprocessed.
571 Generate_SCO : Boolean := False;
573 -- True when switch -gnateS is used. When True, Source Coverage Obligation
574 -- (SCO) information is generated and output in the ALI file. See unit
575 -- Par_SCO for full details.
577 Generating_Code : Boolean := False;
579 -- True if the frontend finished its work and has called the backend to
580 -- process the tree and generate the object file.
582 Global_Discard_Names : Boolean := False;
584 -- True if a pragma Discard_Names appeared as a configuration pragma for
585 -- the current compilation unit.
587 GNAT_Mode : Boolean := False;
589 -- True if compiling in GNAT system mode (-gnatg switch)
591 Heap_Size : Nat := 0;
593 -- Heap size for memory allocations. Valid values are 32 and 64. Only
596 HLO_Active : Boolean := False;
598 -- True if High Level Optimizer is activated (-gnatH switch)
600 Identifier_Character_Set : Character;
602 -- This variable indicates the character set to be used for identifiers.
603 -- The possible settings are:
604 -- '1' Latin-5 (ISO-8859-1)
605 -- '2' Latin-5 (ISO-8859-2)
606 -- '3' Latin-5 (ISO-8859-3)
607 -- '4' Latin-5 (ISO-8859-4)
608 -- '5' Latin-5 (ISO-8859-5, Cyrillic)
609 -- '9' Latin-5 (ISO-8859-9)
610 -- 'p' PC (US, IBM page 437)
611 -- '8' PC (European, IBM page 850)
612 -- 'f' Full upper set (all distinct)
613 -- 'n' No upper characters (Ada 83 rules)
614 -- 'w' Latin-1 plus wide characters allowed in identifiers
616 -- The setting affects the set of letters allowed in identifiers and the
617 -- upper/lower case equivalences. It does not affect the interpretation of
618 -- character and string literals, which are always stored using the actual
619 -- coding in the source program. This variable is initialized to the
620 -- default value appropriate to the system (in Osint.Initialize), and then
621 -- reset if a command line switch is used to change the setting.
623 Ignore_Rep_Clauses : Boolean := False;
625 -- Set True to ignore all representation clauses. Useful when compiling
626 -- code from foreign compilers for checking or ASIS purposes. Can be
627 -- set True by use of -gnatI.
629 Implementation_Unit_Warnings : Boolean := True;
631 -- Set True to active warnings for use of implementation internal units.
632 -- Can be controlled by use of -gnatwi/-gnatwI.
634 Implicit_Packing : Boolean := False;
636 -- If set True, then a Size attribute clause on an array is allowed to
637 -- cause implicit packing instead of generating an error message. Set by
638 -- use of pragma Implicit_Packing.
640 Ineffective_Inline_Warnings : Boolean := False;
642 -- Set True to activate warnings if front-end inlining (-gnatN) is not
643 -- able to actually inline a particular call (or all calls). Can be
644 -- controlled by use of -gnatwp/-gnatwP.
646 Init_Or_Norm_Scalars : Boolean := False;
648 -- Set True if a pragma Initialize_Scalars applies to the current unit.
649 -- Also set True if a pragma Normalize_Scalars applies.
651 Initialize_Scalars : Boolean := False;
653 -- Set True if a pragma Initialize_Scalars applies to the current unit.
654 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
656 Initialize_Scalars_Mode1 : Character := 'I';
657 Initialize_Scalars_Mode2 : Character := 'N';
659 -- Set to two characters from -S switch (IN/LO/HI/EV/xx). The default
660 -- is IN (invalid values), used if no -S switch is used.
662 Inline_Active : Boolean := False;
664 -- Set True to activate pragma Inline processing across modules. Default
665 -- for now is not to inline across module boundaries.
667 Interface_Library_Unit : Boolean := False;
669 -- Set to True to indicate that at least one ALI file is an interface ALI:
670 -- then elaboration flag checks are to be generated in the binder
673 Generate_SCIL : Boolean := False;
675 -- Set True to activate SCIL code generation.
677 Invalid_Value_Used : Boolean := False;
679 -- Set True if a valid Invalid_Value attribute is encountered
681 Follow_Links_For_Files : Boolean := False;
683 -- Set to True (-eL) to process the project files in trusted mode. If
684 -- Follow_Links is False, it is assumed that the project doesn't contain
685 -- any file duplicated through symbolic links (although the latter are
686 -- still valid if they point to a file which is outside of the project),
687 -- and that no directory has a name which is a valid source name.
689 Follow_Links_For_Dirs : Boolean := False;
691 -- Set to True if directories can be links in this project, and therefore
692 -- additional system calls must be performed to ensure that we always see
693 -- the same full name for each directory.
695 Front_End_Inlining : Boolean := False;
697 -- Set True to activate inlining by front-end expansion
699 Inline_Processing_Required : Boolean := False;
701 -- Set True if inline processing is required. Inline processing is required
702 -- if an active Inline pragma is processed. The flag is set for a pragma
703 -- Inline or Inline_Always that is actually active.
705 In_Place_Mode : Boolean := False;
707 -- Set True to store ALI and object files in place i.e. in the object
708 -- directory if these files already exist or in the source directory
711 Keep_Going : Boolean := False;
712 -- GNATMAKE, GPRMAKE, GPRBUILD
713 -- When True signals to ignore compilation errors and keep processing
714 -- sources until there is no more work.
716 Keep_Temporary_Files : Boolean := False;
718 -- When True the temporary files created by the GNAT driver are not
719 -- deleted. Set by switch -dn or qualifier /KEEP_TEMPORARY_FILES.
721 Leap_Seconds_Support : Boolean := False;
723 -- Set to True to enable leap seconds support in Ada.Calendar and its
726 Link_Only : Boolean := False;
727 -- GNATMAKE, GPRMAKE, GPRBUILD
728 -- Set to True to skip compile and bind steps (except when Bind_Only is
731 List_Restrictions : Boolean := False;
733 -- Set to True to list restrictions pragmas that could apply to partition
735 List_Units : Boolean := False;
737 -- List units in the active library for a compilation (-gnatu switch)
739 List_Closure : Boolean := False;
741 -- List all sources in the closure of a main (-R gnatbind switch)
743 List_Dependencies : Boolean := False;
745 -- When True gnatmake verifies that the objects are up to date and
746 -- outputs the list of object dependencies (-M switch).
747 -- Output depends if -a switch is used or not.
748 -- This list can be used directly in a Makefile.
750 List_Representation_Info : Int range 0 .. 3 := 0;
752 -- Set non-zero by -gnatR switch to list representation information.
753 -- The settings are as follows:
755 -- 0 = no listing of representation information (default as above)
756 -- 1 = list rep info for user defined record and array types
757 -- 2 = list rep info for all user defined types and objects
758 -- 3 = like 2, but variable fields are decoded symbolically
760 List_Representation_Info_To_File : Boolean := False;
762 -- Set true by -gnatRs switch. Causes information from -gnatR/1/2/3 to be
763 -- written to file.rep (where file is the name of the source file) instead
764 -- of stdout. For example, if file x.adb is compiled using -gnatR2s then
765 -- representation info is written to x.adb.ref.
767 List_Representation_Info_Mechanisms : Boolean := False;
769 -- Set true by -gnatRm switch. Causes information on mechanisms to be
770 -- included in the representation output information.
772 List_Preprocessing_Symbols : Boolean := False;
774 -- Set to True if symbols for preprocessing a source are to be listed
775 -- before preprocessing occurs. Set to True by switch -s of gnatprep or
776 -- -s in preprocessing data file for the compiler.
778 type Create_Repinfo_File_Proc is access procedure (Src : String);
779 type Write_Repinfo_Line_Proc is access procedure (Info : String);
780 type Close_Repinfo_File_Proc is access procedure;
781 -- Types used for procedure addresses below
783 Create_Repinfo_File_Access : Create_Repinfo_File_Proc := null;
784 Write_Repinfo_Line_Access : Write_Repinfo_Line_Proc := null;
785 Close_Repinfo_File_Access : Close_Repinfo_File_Proc := null;
787 -- These three locations are left null when operating in non-compiler (e.g.
788 -- ASIS mode), but when operating in compiler mode, they are set to point
789 -- to the three corresponding procedures in Osint-C. The reason for this
790 -- slightly strange interface is to stop Repinfo from dragging in Osint in
791 -- ASIS mode, which would include lots of unwanted units in the ASIS build.
793 type Create_List_File_Proc is access procedure (S : String);
794 type Write_List_Info_Proc is access procedure (S : String);
795 type Close_List_File_Proc is access procedure;
796 -- Types used for procedure addresses below
798 Create_List_File_Access : Create_List_File_Proc := null;
799 Write_List_Info_Access : Write_List_Info_Proc := null;
800 Close_List_File_Access : Close_List_File_Proc := null;
802 -- These three locations are left null when operating in non-compiler
803 -- (e.g. from the binder), but when operating in compiler mode, they are
804 -- set to point to the three corresponding procedures in Osint-C. The
805 -- reason for this slightly strange interface is to prevent Repinfo
806 -- from dragging in Osint-C in the binder, which would include unwanted
807 -- units in the binder.
809 Locking_Policy : Character := ' ';
811 -- Set to ' ' for the default case (no locking policy specified). Reset to
812 -- first character (uppercase) of locking policy name if a valid pragma
813 -- Locking_Policy is encountered.
815 Locking_Policy_Sloc : Source_Ptr := No_Location;
817 -- Remember location of previous Locking_Policy pragma. This is used for
818 -- inconsistency error messages. A value of System_Location is used if the
819 -- policy is set in package System.
821 Look_In_Primary_Dir : Boolean := True;
822 -- GNAT, GNATBIND, GNATMAKE, GNATCLEAN
823 -- Set to False if a -I- was present on the command line. When True we are
824 -- allowed to look in the primary directory to locate other source or
827 Make_Steps : Boolean := False;
829 -- Set to True when either Compile_Only, Bind_Only or Link_Only is
832 Main_Index : Int := 0;
834 -- This is set to non-zero by gnatmake switch -eInnn to indicate that
835 -- the main program is the nnn unit in a multi-unit source file.
837 Mapping_File_Name : String_Ptr := null;
839 -- File name of mapping between unit names, file names and path names.
840 -- (given by switch -gnatem)
842 Maximum_Messages : Int := 9999;
844 -- Maximum default number of errors before compilation is terminated, or in
845 -- the case of GNAT, maximum number of warnings before further warnings are
846 -- suppressed. Can be overridden by -gnatm (GNAT) or -m (GNATBIND) switch.
848 Maximum_File_Name_Length : Int;
850 -- Maximum number of characters allowed in a file name, not counting the
851 -- extension, as set by the appropriate switch. If no switch is given,
852 -- then this value is initialized by Osint to the appropriate value.
854 Maximum_Processes : Positive := 1;
855 -- GNATMAKE, GPRMAKE, GPRBUILD
856 -- Maximum number of processes that should be spawned to carry out
859 Minimal_Recompilation : Boolean := False;
861 -- Set to True if minimal recompilation mode requested
863 Special_Exception_Package_Used : Boolean := False;
865 -- Set to True if either of the unit GNAT.Most_Recent_Exception or
866 -- GNAT.Exception_Traces is with'ed. Used to inhibit transformation of
867 -- local raise statements into gotos in the presence of either package.
869 Multiple_Unit_Index : Int;
871 -- This is set non-zero if the current unit is being compiled in multiple
872 -- unit per file mode, meaning that the current unit is selected from the
873 -- sequence of units in the current source file, using the value stored
874 -- in this variable (e.g. 2 = select second unit in file). A value of
875 -- zero indicates that we are in normal (one unit per file) mode.
877 No_Main_Subprogram : Boolean := False;
878 -- GNATMAKE, GNATBIND
879 -- Set to True if compilation/binding of a program without main
880 -- subprogram requested.
882 No_Run_Time_Mode : Boolean := False;
884 -- This flag is set True if a No_Run_Time pragma is encountered. See
885 -- spec of Rtsfind for a full description of handling of this pragma.
887 No_Split_Units : Boolean := False;
889 -- Set to True with switch --no-split-units. When True, unit sources, spec,
890 -- body and subunits, must all be in the same project.This is checked after
893 No_Stdinc : Boolean := False;
894 -- GNAT, GNATBIND, GNATMAKE, GNATFIND, GNATXREF
895 -- Set to True if no default source search dirs added to search list
897 No_Stdlib : Boolean := False;
898 -- GNATMAKE, GNATBIND, GNATFIND, GNATXREF
899 -- Set to True if no default library search dirs added to search list
901 No_Strict_Aliasing : Boolean := False;
903 -- Set True if pragma No_Strict_Aliasing with no parameters encountered
905 Normalize_Scalars : Boolean := False;
907 -- Set True if a pragma Normalize_Scalars applies to the current unit.
908 -- Note that Init_Or_Norm_Scalars is also set to True if this is True.
910 Object_Directory_Present : Boolean := False;
912 -- Set to True when an object directory is specified with option -D
914 One_Compilation_Per_Obj_Dir : Boolean := False;
915 -- GNATMAKE, GPRBUILD
916 -- Set to True with switch --single-compile-per-obj-dir. When True, there
917 -- cannot be simultaneous compilations with the object files in the same
918 -- object directory, if project files are used.
920 type Operating_Mode_Type is (Check_Syntax, Check_Semantics, Generate_Code);
921 Operating_Mode : Operating_Mode_Type := Generate_Code;
923 -- Indicates the operating mode of the compiler. The default is generate
924 -- code, which runs the parser, semantics and backend. Switches can be
925 -- used to set syntax checking only mode, or syntax and semantics checking
926 -- only mode. Operating_Mode can also be modified as a result of detecting
927 -- errors during the compilation process. In particular if any serious
928 -- error is detected then this flag is reset from Generate_Code to
929 -- Check_Semantics after generating an error message.
931 Optimize_Alignment : Character := 'O';
932 -- Setting of Optimize_Alignment, set to T/S/O for time/space/off. Can
933 -- be modified by use of pragma Optimize_Alignment.
935 Optimize_Alignment_Local : Boolean := False;
936 -- Set True if Optimize_Alignment mode is set by a local configuration
937 -- pragma that overrides the gnat.adc (or other configuration file) default
938 -- so that the unit is not dependent on the default setting. Also always
939 -- set True for internal units, since these always have a default setting
940 -- of Optimize_Alignment (Off) that is enforced (essentially equivalent to
941 -- them all having such an explicit pragma in each unit).
943 Original_Operating_Mode : Operating_Mode_Type := Generate_Code;
945 -- Indicates the original operating mode of the compiler as set by compiler
946 -- options. This is identical to Operating_Mode except that this is not
947 -- affected by errors.
949 Optimization_Level : Int;
950 pragma Import (C, Optimization_Level, "optimize");
951 -- Constant reflecting the optimization level (0,1,2,3 for -O0,-O1,-O2,-O3)
952 -- See jmissing.c and aamissing.c for definitions for dotnet/jgnat and
956 pragma Import (C, Optimize_Size, "optimize_size");
957 -- Constant reflecting setting of -Os (optimize for size). Set to nonzero
958 -- in -Os mode and set to zero otherwise. See jmissing.c and aamissing.c
959 -- for definitions of "optimize_size" for dotnet/jgnat and GNAAMP backends
961 Output_File_Name_Present : Boolean := False;
962 -- GNATBIND, GNAT, GNATMAKE, GPRMAKE
963 -- Set to True when the output C file name is given with option -o for
964 -- GNATBIND, when the object file name is given with option -gnatO for GNAT
965 -- or when the executable is given with option -o for GNATMAKE or GPRMAKE.
967 Output_Linker_Option_List : Boolean := False;
969 -- True if output of list of linker options is requested (-K switch set)
971 Output_ALI_List : Boolean := False;
972 ALI_List_Filename : String_Ptr;
974 -- True if output of list of ALIs is requested (-A switch set). List is
975 -- output under the given filename, or standard output if not specified.
977 Output_Object_List : Boolean := False;
978 Object_List_Filename : String_Ptr;
980 -- True if output of list of objects is requested (-O switch set). List is
981 -- output under the given filename, or standard output if not specified.
983 Overflow_Checks_Unsuppressed : Boolean := False;
985 -- Set to True if at least one occurrence of pragma Unsuppress
986 -- (All_Checks|Overflow_Checks) has been processed.
988 Persistent_BSS_Mode : Boolean := False;
990 -- True if a Persistent_BSS configuration pragma is in effect, causing
991 -- potentially persistent data to be placed in the persistent_bss section.
993 Pessimistic_Elab_Order : Boolean := False;
995 -- True if pessimistic elaboration order is to be chosen (-p switch set)
997 Polling_Required : Boolean := False;
999 -- Set to True if polling for asynchronous abort is enabled by using
1000 -- the -gnatP option for GNAT.
1002 Preprocessing_Data_File : String_Ptr := null;
1004 -- Set by switch -gnatep=. The file name of the preprocessing data file.
1006 Print_Generated_Code : Boolean := False;
1008 -- Set to True to enable output of generated code in source form. This
1009 -- flag is set by the -gnatG switch.
1011 Print_Standard : Boolean := False;
1013 -- Set to true to enable printing of package standard in source form.
1014 -- This flag is set by the -gnatS switch
1016 Propagate_Exceptions : Boolean := False;
1018 -- Indicates if subprogram descriptor exception tables should be
1019 -- built for imported subprograms. Set True if a Propagate_Exceptions
1020 -- pragma applies to the extended main unit.
1022 type Usage is (Unknown, Not_In_Use, In_Use);
1023 Project_File_In_Use : Usage := Unknown;
1025 -- Indicates if a project file is used or not. Set to In_Use by the first
1028 Queuing_Policy : Character := ' ';
1030 -- Set to ' ' for the default case (no queuing policy specified). Reset to
1031 -- first character (uppercase) of locking policy name if a valid
1032 -- Queuing_Policy pragma is encountered.
1034 Queuing_Policy_Sloc : Source_Ptr := No_Location;
1036 -- Remember location of previous Queuing_Policy pragma. This is used for
1037 -- inconsistency error messages. A value of System_Location is used if the
1038 -- policy is set in package System.
1040 Quiet_Output : Boolean := False;
1041 -- GNATMAKE, GNATCLEAN, GPRMAKE, GPRBUILD, GPRCLEAN
1042 -- Set to True if the tool should not have any output if there are no
1043 -- errors or warnings.
1045 Replace_In_Comments : Boolean := False;
1047 -- Set to True if -C switch used
1049 RTS_Lib_Path_Name : String_Ptr := null;
1050 RTS_Src_Path_Name : String_Ptr := null;
1052 -- Set to the "adalib" and "adainclude" directories of the run time
1053 -- specified by --RTS=.
1055 RTS_Switch : Boolean := False;
1056 -- GNAT, GNATMAKE, GNATBIND, GNATLS, GNATFIND, GNATXREF
1057 -- Set to True when the --RTS switch is set
1059 Run_Path_Option : Boolean := True;
1060 -- GNATMAKE, GNATLINK
1061 -- Set to False when no run_path_option should be issued to the linker
1063 Search_Directory_Present : Boolean := False;
1065 -- Set to True when argument is -I. Reset to False when next argument, a
1066 -- search directory path is taken into account. Note that this is quite
1067 -- different from other switches in this section in that it is only set in
1068 -- a transitory manner as a result of scanning a -I switch with no file
1069 -- name, and if set, is an indication that the next argument is to be
1070 -- treated as a file name.
1072 Sec_Stack_Used : Boolean := False;
1074 -- Set True if generated code uses the System.Secondary_Stack package. For
1075 -- the binder, set if any unit uses the secondary stack package.
1077 Setup_Projects : Boolean := False;
1079 -- Set to True for GNAT SETUP: the Project Manager creates non existing
1080 -- object, library and exec directories.
1082 Shared_Libgnat : Boolean;
1084 -- Set to True if a shared libgnat is requested by using the -shared option
1085 -- for GNATBIND and to False when using the -static option. The value of
1086 -- this flag is set by Gnatbind.Scan_Bind_Arg.
1088 Short_Circuit_And_Or : Boolean := False;
1090 -- Set True if a pragma Short_Circuit_And_Or applies to the current unit.
1092 Short_Descriptors : Boolean := False;
1094 -- Set True if a pragma Short_Descriptors applies to the current unit.
1096 Sprint_Line_Limit : Nat := 72;
1098 -- Limit values for chopping long lines in Sprint output, can be reset
1099 -- by use of NNN parameter with -gnatG or -gnatD switches.
1101 Stack_Checking_Enabled : Boolean;
1103 -- Set to indicate if -fstack-check switch is set for the compilation. True
1104 -- means that the switch is set, so that stack checking is enabled. False
1105 -- means that the switch is not set (no stack checking). This value is
1106 -- obtained from the external imported value flag_stack_check in the gcc
1107 -- backend (see Frontend) and may be referenced throughout the compilation
1110 Style_Check : Boolean := False;
1112 -- Set True to perform style checks. Activates checks carried out in
1113 -- package Style (see body of this package for details of checks) This
1114 -- flag is set True by either the -gnatg or -gnaty switches.
1116 Suppress_All_Inlining : Boolean := False;
1118 -- Set by -fno-inline. Suppresses all inlining, both front end and back end
1119 -- regardless of any other switches that are set.
1121 Suppress_Control_Flow_Optimizations : Boolean := False;
1123 -- Set by -fpreserve-control-flow. Suppresses control flow optimizations
1124 -- that interfere with coverage analysis based on the object code.
1126 System_Extend_Pragma_Arg : Node_Id := Empty;
1128 -- Set non-empty if and only if a correct Extend_System pragma was present
1129 -- in which case it points to the argument of the pragma, and the name can
1130 -- be located as Chars (Expression (System_Extend_Pragma_Arg)).
1132 System_Extend_Unit : Node_Id := Empty;
1134 -- This is set to Empty if GNAT_Mode is set, since pragma Extend_System
1135 -- is never appropriate in GNAT_Mode (and causes troubles, including
1136 -- bogus circularities, if we try to compile the run-time library with
1137 -- a System extension). If GNAT_Mode is not set, then System_Extend_Unit
1138 -- is a copy of the value set in System_Extend_Pragma_Arg.
1140 Subunits_Missing : Boolean := False;
1142 -- This flag is set true if missing subunits are detected with code
1143 -- generation active. This causes code generation to be skipped.
1145 Suppress_Checks : Boolean := False;
1147 -- Set to True if -gnatp (suppress all checks) switch present.
1149 Suppress_Options : Suppress_Array;
1151 -- Flags set True to suppress corresponding check, i.e. add an implicit
1152 -- pragma Suppress at the outer level of each unit compiled. Note that
1153 -- these suppress actions can be overridden by the use of the Unsuppress
1154 -- pragma. This variable is initialized by Osint.Initialize.
1156 Suppress_Back_Annotation : Boolean := False;
1158 -- This flag is set True if back annotation of representation information
1159 -- is to be suppressed. This is set if neither -gnatt or -gnatR0-3 is set.
1160 -- This avoids unnecessary time being spent on back annotation.
1162 Table_Factor : Int := 1;
1164 -- Factor by which all initial table sizes set in Alloc are multiplied.
1165 -- Used in Table to calculate initial table sizes (the initial table size
1166 -- is the value in Alloc, used as the Table_Initial parameter value,
1167 -- multiplied by the factor given here. The default value is used if no
1168 -- -gnatT switch appears.
1170 Tagged_Type_Expansion : Boolean := True;
1172 -- Set True if tagged types and interfaces should be expanded by the
1173 -- front-end. If False, the original tree is left unexpanded for tagged
1174 -- types and dispatching calls, assuming the underlying target supports
1175 -- it (e.g. in the JVM case).
1177 Task_Dispatching_Policy : Character := ' ';
1179 -- Set to ' ' for the default case (no task dispatching policy specified).
1180 -- Reset to first character (uppercase) of task dispatching policy name
1181 -- if a valid Task_Dispatching_Policy pragma is encountered.
1183 Task_Dispatching_Policy_Sloc : Source_Ptr := No_Location;
1185 -- Remember location of previous Task_Dispatching_Policy pragma. This is
1186 -- used for inconsistency error messages. A value of System_Location is
1187 -- used if the policy is set in package System.
1189 Tasking_Used : Boolean := False;
1190 -- Set True if any tasking construct is encountered. Used to activate the
1191 -- output of the Q, L and T lines in ALI files.
1193 Time_Slice_Set : Boolean := False;
1195 -- Set True if a pragma Time_Slice is processed in the main unit, or
1196 -- if the -gnatTnn switch is present to set a time slice value.
1198 Time_Slice_Value : Nat;
1200 -- Time slice value. Valid only if Time_Slice_Set is True, i.e. if
1201 -- Time_Slice pragma has been processed. Set to the time slice value in
1202 -- microseconds. Negative values are stored as zero, and the value is not
1203 -- larger than 1_000_000_000 (1000 seconds). Values larger than this are
1204 -- reset to this maximum. This can also be set with the -gnatTnn switch.
1206 Tolerate_Consistency_Errors : Boolean := False;
1208 -- Tolerate time stamp and other consistency errors. If this flag is set to
1209 -- True (-t), then inconsistencies result in warnings rather than errors.
1211 Treat_Restrictions_As_Warnings : Boolean := False;
1213 -- Set True to treat pragma Restrictions as Restriction_Warnings. Set by
1216 Tree_Output : Boolean := False;
1218 -- Set to True (-gnatt) to generate output tree file
1220 True_VMS_Target : Boolean := False;
1221 -- Set True if we are on a VMS target. The setting of this flag reflects
1222 -- the true state of the compile, unlike Targparm.OpenVMS_On_Target which
1223 -- can also be true when debug flag m is set (-gnatdm). This is used in the
1224 -- few cases where we do NOT want -gnatdm to trigger the VMS behavior.
1226 Try_Semantics : Boolean := False;
1228 -- Flag set to force attempt at semantic analysis, even if parser errors
1229 -- occur. This will probably cause blowups at this stage in the game. On
1230 -- the other hand, most such blowups will be caught cleanly and simply
1231 -- say compilation abandoned. This flag is set to True by -gnatq or -gnatQ.
1233 Unchecked_Shared_Lib_Imports : Boolean := False;
1235 -- Set to True when shared library projects are allowed to import projects
1236 -- that are not shared library projects. Set by switch
1237 -- --unchecked-shared-lib-imports.
1239 Undefined_Symbols_Are_False : Boolean := False;
1241 -- Set to True by switch -u of gnatprep or -u in the preprocessing data
1242 -- file for the compiler. Indicates that while preprocessing sources,
1243 -- symbols that are not defined have the value FALSE.
1245 Unique_Error_Tag : Boolean := Tag_Errors;
1247 -- Indicates if error messages are to be prefixed by the string error:
1248 -- Initialized from Tag_Errors, can be forced on with the -gnatU switch.
1250 Universal_Addressing_On_AAMP : Boolean := False;
1252 -- Indicates if library-level objects should be accessed and updated using
1253 -- universal addressing instructions on the AAMP architecture. This flag is
1254 -- set to True when pragma Universal_Data is given as a configuration
1257 Unreserve_All_Interrupts : Boolean := False;
1259 -- Normally set False, set True if a valid Unreserve_All_Interrupts pragma
1260 -- appears anywhere in the main unit for GNAT, or if any ALI file has the
1261 -- corresponding attribute set in GNATBIND.
1263 Upper_Half_Encoding : Boolean := False;
1265 -- Normally set False, indicating that upper half ISO 8859-1 characters are
1266 -- used in the normal way to represent themselves. If the wide character
1267 -- encoding method uses the upper bit for this encoding, then this flag is
1268 -- set True, and upper half characters in the source indicate the start of
1269 -- a wide character sequence. Set by -gnatW or -W switches.
1271 Use_Include_Path_File : Boolean := False;
1272 -- GNATMAKE, GPRBUILD
1273 -- When True, create a source search path file, even when a mapping file
1276 Usage_Requested : Boolean := False;
1277 -- GNAT, GNATBIND, GNATMAKE
1278 -- Set to True if -h (-gnath for the compiler) switch encountered
1279 -- requesting usage information
1281 Use_Expression_With_Actions : Boolean;
1282 -- The N_Expression_With_Actions node has been introduced relatively
1283 -- recently, and not all back ends are prepared to handle it yet. So
1284 -- we use this flag to suppress its use during a transitional period.
1285 -- Currently the default is False for all cases (set in gnat1drv).
1286 -- The default can be modified using -gnatd.X/-gnatd.Y.
1288 Use_Pragma_Linker_Constructor : Boolean := False;
1290 -- True if pragma Linker_Constructor applies to adainit
1292 Use_VADS_Size : Boolean := False;
1294 -- Set to True if a valid pragma Use_VADS_Size is processed
1296 Validity_Checks_On : Boolean := True;
1298 -- This flag determines if validity checking is on or off. The initial
1299 -- state is on, and the required default validity checks are active. The
1300 -- actual set of checks that is performed if Validity_Checks_On is set is
1301 -- defined by the switches in package Validsw. The Validity_Checks_On flag
1302 -- is controlled by pragma Validity_Checks (On | Off), and also some
1303 -- generated compiler code (typically code that has to do with validity
1304 -- check generation) is compiled with this flag set to False. This flag is
1305 -- set to False by the -gnatp switch.
1307 Verbose_Mode : Boolean := False;
1308 -- GNAT, GNATBIND, GNATMAKE, GNATLINK, GNATLS, GNATNAME, GNATCLEAN,
1309 -- GPRMAKE, GPRBUILD, GPRCLEAN
1310 -- Set to True to get verbose mode (full error message text and location
1311 -- information sent to standard output, also header, copyright and summary)
1313 type Verbosity_Level_Type is (None, Low, Medium, High);
1314 pragma Ordered (Verbosity_Level_Type);
1315 Verbosity_Level : Verbosity_Level_Type := High;
1316 -- GNATMAKE, GPRMAKE
1317 -- Modified by gnatmake or gprmake switches -v, -vl, -vm, -vh. Indicates
1318 -- the level of verbosity of informational messages:
1320 -- In Low Verbosity, the reasons why a source is recompiled, the name
1321 -- of the executable and the reason it must be rebuilt is output.
1323 -- In Medium Verbosity, additional lines are output for each ALI file
1326 -- In High Verbosity, additional lines are output when the ALI file
1327 -- is part of an Ada library, is read-only or is part of the runtime.
1329 Warn_On_Ada_2005_Compatibility : Boolean := True;
1331 -- Set to True to generate all warnings on Ada 2005 compatibility issues,
1332 -- including warnings on Ada 2005 obsolescent features used in Ada 2005
1333 -- mode. Set False by -gnatwY.
1335 Warn_On_Ada_2012_Compatibility : Boolean := True;
1337 -- Set to True to generate all warnings on Ada 2012 compatibility issues,
1338 -- including warnings on Ada 2012 obsolescent features used in Ada 2012
1339 -- mode. Set False by -gnatwY.
1341 Warn_On_Parameter_Order : Boolean := False;
1343 -- Set to True to generate warnings for cases where the argument list for
1344 -- a call is a sequence of identifiers that match the formal identifiers,
1345 -- but are in the wrong order.
1347 Warn_On_Assertion_Failure : Boolean := True;
1349 -- Set to True to activate warnings on assertions that can be determined
1350 -- at compile time will always fail. Set false by -gnatw.A.
1352 Warn_On_Assumed_Low_Bound : Boolean := True;
1354 -- Set to True to activate warnings for string parameters that are indexed
1355 -- with literals or S'Length, presumably assuming a lower bound of one. Set
1356 -- False by -gnatwW.
1358 Warn_On_Bad_Fixed_Value : Boolean := False;
1360 -- Set to True to generate warnings for static fixed-point expression
1361 -- values that are not an exact multiple of the small value of the type.
1363 Warn_On_Biased_Representation : Boolean := True;
1365 -- Set to True to generate warnings for size clauses, component clauses
1366 -- and component_size clauses that force biased representation. Set False
1369 Warn_On_Constant : Boolean := False;
1371 -- Set to True to generate warnings for variables that could be declared
1372 -- as constants. Modified by use of -gnatwk/K.
1374 Warn_On_Deleted_Code : Boolean := False;
1376 -- Set to True to generate warnings for code deleted by the front end
1377 -- for conditional statements whose outcome is known at compile time.
1378 -- Modified by use of -gnatwt/T.
1380 Warn_On_Dereference : Boolean := False;
1382 -- Set to True to generate warnings for implicit dereferences for array
1383 -- indexing and record component access. Modified by use of -gnatwd/D.
1385 Warn_On_Export_Import : Boolean := True;
1387 -- Set to True to generate warnings for suspicious use of export or
1388 -- import pragmas. Modified by use of -gnatwx/X.
1390 Warn_On_Hiding : Boolean := False;
1392 -- Set to True to generate warnings if a declared entity hides another
1393 -- entity. The default is that this warning is suppressed.
1395 Warn_On_Modified_Unread : Boolean := False;
1397 -- Set to True to generate warnings if a variable is assigned but is never
1398 -- read. Also controls warnings for similar cases involving out parameters,
1399 -- but only if there is only one out parameter for the procedure involved.
1400 -- The default is that this warning is suppressed.
1402 Warn_On_All_Unread_Out_Parameters : Boolean := False;
1404 -- Set to True to generate warnings in all cases where a variable is
1405 -- modified by being passed as to an OUT formal, but the resulting value is
1406 -- never read. The default is that this warning is suppressed, except in
1409 Warn_On_No_Value_Assigned : Boolean := True;
1411 -- Set to True to generate warnings if no value is ever assigned to a
1412 -- variable that is at least partially uninitialized. Set to false to
1413 -- suppress such warnings. The default is that such warnings are enabled.
1415 Warn_On_Non_Local_Exception : Boolean := False;
1417 -- Set to True to generate warnings for non-local exception raises and also
1418 -- handlers that can never handle a local raise. This warning is only ever
1419 -- generated if pragma Restrictions (No_Exception_Propagation) is set. The
1420 -- default is not to generate the warnings except that if the source has
1421 -- at least one exception handler, and this restriction is set, and the
1422 -- warning was not explicitly turned off, then it is turned on by default.
1424 No_Warn_On_Non_Local_Exception : Boolean := False;
1426 -- This is set to True if the above warning is explicitly suppressed. We
1427 -- use this to avoid turning it on by default when No_Exception_Propagation
1428 -- restriction is set and an exception handler is present.
1430 Warn_On_Obsolescent_Feature : Boolean := False;
1432 -- Set to True to generate warnings on use of any feature in Annex or if a
1433 -- subprogram is called for which a pragma Obsolescent applies.
1435 Warn_On_Overlap : Boolean := False;
1437 -- Set to True to generate warnings when a writable actual which is not
1438 -- a by-copy type overlaps with another actual in a subprogram call.
1440 Warn_On_Questionable_Missing_Parens : Boolean := True;
1442 -- Set to True to generate warnings for cases where parentheses are missing
1443 -- and the usage is questionable, because the intent is unclear.
1445 Warn_On_Redundant_Constructs : Boolean := False;
1447 -- Set to True to generate warnings for redundant constructs (e.g. useless
1448 -- assignments/conversions). The default is that this warning is disabled.
1450 Warn_On_Object_Renames_Function : Boolean := False;
1452 -- Set to True to generate warnings when a function result is renamed as
1453 -- an object. The default is that this warning is disabled.
1455 Warn_On_Reverse_Bit_Order : Boolean := True;
1457 -- Set to True to generate warning (informational) messages for component
1458 -- clauses that are affected by non-standard bit-order. The default is
1459 -- that this warning is enabled.
1461 Warn_On_Suspicious_Modulus_Value : Boolean := True;
1463 -- Set to True to generate warnings for suspicious modulus values. The
1464 -- default is that this warning is enabled.
1466 Warn_On_Unchecked_Conversion : Boolean := True;
1468 -- Set to True to generate warnings for unchecked conversions that may have
1469 -- non-portable semantics (e.g. because sizes of types differ). The default
1470 -- is that this warning is enabled.
1472 Warn_On_Unordered_Enumeration_Type : Boolean := False;
1474 -- Set to True to generate warnings for inappropriate uses (comparisons
1475 -- and explicit ranges) on unordered enumeration types (which includes
1476 -- all enumeration types for which pragma Ordered is not given). The
1477 -- default is that this warning is disabled.
1479 Warn_On_Unrecognized_Pragma : Boolean := True;
1481 -- Set to True to generate warnings for unrecognized pragmas. The default
1482 -- is that this warning is enabled.
1484 Warn_On_Unrepped_Components : Boolean := False;
1486 -- Set to True to generate warnings for the case of components of record
1487 -- which have a record representation clause but this component does not
1488 -- have a component clause. The default is that this warning is disabled.
1490 Warn_On_Warnings_Off : Boolean := False;
1492 -- Set to True to generate warnings for use of Pragma Warnings (Off, ent),
1493 -- where either the pragma is never used, or it could be replaced by a
1494 -- pragma Unmodified or Unreferenced.
1496 type Warning_Mode_Type is (Suppress, Normal, Treat_As_Error);
1497 Warning_Mode : Warning_Mode_Type := Normal;
1499 -- Controls treatment of warning messages. If set to Suppress, warning
1500 -- messages are not generated at all. In Normal mode, they are generated
1501 -- but do not count as errors. In Treat_As_Error mode, warning messages
1502 -- are generated and are treated as errors.
1504 Wide_Character_Encoding_Method : WC_Encoding_Method := WCEM_Brackets;
1506 -- Method used for encoding wide characters in the source program. See
1507 -- description of type in unit System.WCh_Con for a list of the methods
1508 -- that are currently supported. Note that brackets notation is always
1509 -- recognized in source programs regardless of the setting of this
1510 -- variable. The default setting causes only the brackets notation to be
1511 -- recognized. If this is the main unit, this setting also controls the
1512 -- output of the W=? parameter in the ALI file, which is used to provide
1513 -- the default for encoding [Wide_[Wide_]]Text_IO files. For the binder,
1514 -- the value set here overrides this main unit default.
1516 Wide_Character_Encoding_Method_Specified : Boolean := False;
1518 -- Set True if the value in Wide_Character_Encoding_Method was set as
1519 -- a result of an explicit -gnatW? or -W? switch. False otherwise.
1521 Xref_Active : Boolean := True;
1523 -- Set if cross-referencing is enabled (i.e. xref info in ALI files)
1525 Zero_Formatting : Boolean := False;
1527 -- Do no formatting (no title, no leading spaces, no empty lines) in
1528 -- auxiliary outputs (-e, -K, -l, -R).
1530 ----------------------------
1531 -- Configuration Settings --
1532 ----------------------------
1534 -- These are settings that are used to establish the mode at the start of
1535 -- each unit. The values defined below can be affected either by command
1536 -- line switches, or by the use of appropriate configuration pragmas in a
1537 -- configuration pragma file.
1539 Ada_Version_Config : Ada_Version_Type;
1541 -- This is the value of the configuration switch for the Ada 83 mode, as
1542 -- set by the command line switches -gnat83/95/05, and possibly modified by
1543 -- the use of configuration pragmas Ada_83/Ada95/Ada05. This switch is used
1544 -- to set the initial value for Ada_Version mode at the start of analysis
1545 -- of a unit. Note however, that the setting of this flag is ignored for
1546 -- internal and predefined units (which are always compiled in the most up
1547 -- to date version of Ada).
1549 Ada_Version_Explicit_Config : Ada_Version_Type;
1551 -- This is set in the same manner as Ada_Version_Config. The difference is
1552 -- that the setting of this flag is not ignored for internal and predefined
1553 -- units, which for some purposes do indeed access this value, regardless
1554 -- of the fact that they are compiled the most up to date ada version).
1556 Assertions_Enabled_Config : Boolean;
1558 -- This is the value of the configuration switch for assertions enabled
1559 -- mode, as possibly set by the command line switch -gnata, and possibly
1560 -- modified by the use of the configuration pragma Assertion_Policy.
1562 Assume_No_Invalid_Values_Config : Boolean;
1564 -- This is the value of the configuration switch for assuming "no invalid
1565 -- values enabled" mode, as possibly set by the command line switch
1566 -- -gnatB, and possibly modified by the use of the configuration pragma
1567 -- Assume_No_Invalid_Values.
1569 Check_Policy_List_Config : Node_Id;
1571 -- This points to the list of N_Pragma nodes for Check_Policy pragmas
1572 -- that are linked through the Next_Pragma fields, with the list being
1573 -- terminated by Empty. The order is most recently processed first. This
1574 -- list includes only those pragmas in configuration pragma files.
1576 Debug_Pragmas_Enabled_Config : Boolean;
1578 -- This is the value of the configuration switch for debug pragmas enabled
1579 -- mode, as possibly set by the command line switch -gnata and possibly
1580 -- modified by the use of the configuration pragma Debug_Policy.
1582 Dynamic_Elaboration_Checks_Config : Boolean := False;
1584 -- Set True for dynamic elaboration checking mode, as set by the -gnatE
1585 -- switch or by the use of pragma Elaboration_Checking (Dynamic).
1587 Exception_Locations_Suppressed_Config : Boolean := False;
1589 -- Set True by use of the configuration pragma Suppress_Exception_Messages
1591 Extensions_Allowed_Config : Boolean;
1593 -- This is the flag that indicates whether extensions are allowed. It can
1594 -- be set True either by use of the -gnatX switch, or by use of the
1595 -- configuration pragma Extensions_Allowed (On). It is always set to True
1596 -- for internal GNAT units, since extensions are always permitted in such
1599 External_Name_Exp_Casing_Config : External_Casing_Type;
1601 -- This is the value of the configuration switch that controls casing of
1602 -- external symbols for which an explicit external name is given. It can be
1603 -- set to Uppercase by the command line switch -gnatF, and further modified
1604 -- by the use of the configuration pragma External_Name_Casing in the
1605 -- gnat.adc file. This flag is used to set the initial value for
1606 -- External_Name_Exp_Casing at the start of analyzing each unit. Note
1607 -- however that the setting of this flag is ignored for internal and
1608 -- predefined units (which are always compiled with As_Is mode).
1610 External_Name_Imp_Casing_Config : External_Casing_Type;
1612 -- This is the value of the configuration switch that controls casing of
1613 -- external symbols where the external name is implicitly given. It can be
1614 -- set to Uppercase by the command line switch -gnatF, and further modified
1615 -- by the use of the configuration pragma External_Name_Casing in the
1616 -- gnat.adc file. This flag is used to set the initial value for
1617 -- External_Name_Imp_Casing at the start of analyzing each unit. Note
1618 -- however that the setting of this flag is ignored for internal and
1619 -- predefined units (which are always compiled with Lowercase mode).
1621 Fast_Math_Config : Boolean;
1623 -- This is the value of the configuration switch that controls Fast_Math
1624 -- mode, as set by a Fast_Math pragma in configuration pragmas. It is
1625 -- used to set the initial value of Fast_Math at the start of each new
1626 -- compilation unit.
1628 Init_Or_Norm_Scalars_Config : Boolean;
1630 -- This is the value of the configuration switch that is set by one
1631 -- of the pragmas Initialize_Scalars or Normalize_Scalars.
1633 Initialize_Scalars_Config : Boolean;
1635 -- This is the value of the configuration switch that is set by the
1636 -- pragma Initialize_Scalars when it appears in the gnat.adc file.
1637 -- This switch is not set when the pragma appears ahead of a given
1638 -- unit, so it does not affect the compilation of other units.
1640 Optimize_Alignment_Config : Character;
1642 -- This is the value of the configuration switch that controls the
1643 -- alignment optimization mode, as set by an Optimize_Alignment pragma.
1644 -- It is used to set the initial value of Optimize_Alignment at the start
1645 -- of each new compilation unit, except that it is always set to 'O' (off)
1646 -- for internal units.
1648 Persistent_BSS_Mode_Config : Boolean;
1650 -- This is the value of the configuration switch that controls whether
1651 -- potentially persistent data is to be placed in the persistent_bss
1652 -- section. It can be set True by use of the pragma Persistent_BSS.
1653 -- This flag is used to set the initial value of Persistent_BSS_Mode
1654 -- at the start of each compilation unit, except that it is always
1655 -- set False for predefined units.
1657 Polling_Required_Config : Boolean;
1659 -- This is the value of the configuration switch that controls polling
1660 -- mode. It can be set True by the command line switch -gnatP, and then
1661 -- further modified by the use of pragma Polling in the gnat.adc file. This
1662 -- flag is used to set the initial value for Polling_Required at the start
1663 -- of analyzing each unit.
1665 Short_Descriptors_Config : Boolean;
1667 -- This is the value of the configuration switch that controls the use of
1668 -- Short_Descriptors for setting descriptor default sizes. It can be set
1669 -- True by the use of the pragma Short_Descriptors in the gnat.adc file.
1670 -- This flag is used to set the initial value for Short_Descriptors at the
1671 -- start of analyzing each unit.
1673 Use_VADS_Size_Config : Boolean;
1675 -- This is the value of the configuration switch that controls the use of
1676 -- VADS_Size instead of Size wherever the attribute Size is used. It can
1677 -- be set True by the use of the pragma Use_VADS_Size in the gnat.adc file.
1678 -- This flag is used to set the initial value for Use_VADS_Size at the
1679 -- start of analyzing each unit. Note however that the setting of this flag
1680 -- is ignored for internal and predefined units (which are always compiled
1681 -- with the standard Size semantics).
1683 type Config_Switches_Type is private;
1684 -- Type used to save values of the switches set from Config values
1686 procedure Save_Opt_Config_Switches (Save : out Config_Switches_Type);
1687 -- This procedure saves the current values of the switches which are
1688 -- initialized from the above Config values, and then resets these switches
1689 -- according to the Config value settings.
1691 procedure Set_Opt_Config_Switches
1692 (Internal_Unit : Boolean;
1693 Main_Unit : Boolean);
1694 -- This procedure sets the switches to the appropriate initial values. The
1695 -- parameter Internal_Unit is True for an internal or predefined unit, and
1696 -- affects the way the switches are set (see above). Main_Unit is true if
1697 -- switches are being set for the main unit (this affects setting of the
1698 -- assert/debug pragma switches, which are normally set false by default
1699 -- for an internal unit, except when the internal unit is the main unit,
1700 -- in which case we use the command line settings).
1702 procedure Restore_Opt_Config_Switches (Save : Config_Switches_Type);
1703 -- This procedure restores a set of switch values previously saved by a
1704 -- call to Save_Opt_Switches.
1706 procedure Register_Opt_Config_Switches;
1707 -- This procedure is called after processing the gnat.adc file and other
1708 -- configuration pragma files to record the values of the Config switches,
1709 -- as possibly modified by the use of command line switches and pragmas
1710 -- appearing in these files.
1712 ------------------------
1713 -- Other Global Flags --
1714 ------------------------
1716 Expander_Active : Boolean := False;
1717 -- A flag that indicates if expansion is active (True) or deactivated
1718 -- (False). When expansion is deactivated all calls to expander routines
1719 -- have no effect. Note that the initial setting of False is merely to
1720 -- prevent saving of an undefined value for an initial call to the
1721 -- Expander_Mode_Save_And_Set procedure. For more information on the use of
1722 -- this flag, see package Expander. Indeed this flag might more logically
1723 -- be in the spec of Expander, but it is referenced by Errout, and it
1724 -- really seems wrong for Errout to depend on Expander.
1726 Static_Dispatch_Tables : Boolean := True;
1727 -- This flag indicates if the backend supports generation of statically
1728 -- allocated dispatch tables. If it is True, then the front end will
1729 -- generate static aggregates for dispatch tables that contain forward
1730 -- references to addresses of subprograms not seen yet, and the back end
1731 -- must be prepared to handle this case. If it is False, then the front
1732 -- end generates assignments to initialize the dispatch table, and there
1733 -- are no such forward references. By default we build statically allocated
1734 -- dispatch tables for all library level tagged types in all platforms.This
1735 -- behavior can be disabled using switch -gnatd.t which will set this flag
1736 -- to False and revert to the previous dynamic behavior.
1738 -----------------------
1739 -- Tree I/O Routines --
1740 -----------------------
1742 procedure Tree_Read;
1743 -- Reads switch settings from current tree file using Tree_Read
1745 procedure Tree_Write;
1746 -- Writes out switch settings to current tree file using Tree_Write
1748 --------------------------
1749 -- ASIS Version Control --
1750 --------------------------
1752 -- These two variables (Tree_Version_String and Tree_ASIS_Version_Number)
1753 -- are supposed to be used in the GNAT/ASIS version check performed in
1754 -- the ASIS code (this package is also a part of the ASIS implementation).
1755 -- They are set by Tree_Read procedure, so they represent the version
1756 -- number (and the version string) of the compiler which has created the
1757 -- tree, and they are supposed to be compared with the corresponding values
1758 -- from the Tree_IO and Gnatvsn packages which also are a part of ASIS
1761 Tree_Version_String : String_Access;
1762 -- Used to store the compiler version string read from a tree file to check
1763 -- if it is from the same date as stored in the version string in Gnatvsn.
1764 -- We require that ASIS Pro can be used only with GNAT Pro, but we allow
1765 -- non-Pro ASIS and ASIS-based tools to be used with any version of the
1766 -- GNAT compiler. Therefore, we need the possibility to compare the dates
1767 -- of the corresponding source sets, using version strings that may be
1768 -- of different lengths.
1770 Tree_ASIS_Version_Number : Int;
1771 -- Used to store the ASIS version number read from a tree file to check if
1772 -- it is the same as stored in the ASIS version number in Tree_IO.
1776 -- The following type is used to save and restore settings of switches in
1777 -- Opt that represent the configuration (i.e. result of config pragmas).
1779 -- Note that Ada_Version_Explicit is not included, since this is a sticky
1780 -- flag that once set does not get reset, since the whole idea of this flag
1781 -- is to record the setting for the main unit.
1783 type Config_Switches_Type is record
1784 Ada_Version : Ada_Version_Type;
1785 Ada_Version_Explicit : Ada_Version_Type;
1786 Assertions_Enabled : Boolean;
1787 Assume_No_Invalid_Values : Boolean;
1788 Check_Policy_List : Node_Id;
1789 Debug_Pragmas_Enabled : Boolean;
1790 Dynamic_Elaboration_Checks : Boolean;
1791 Exception_Locations_Suppressed : Boolean;
1792 Extensions_Allowed : Boolean;
1793 External_Name_Exp_Casing : External_Casing_Type;
1794 External_Name_Imp_Casing : External_Casing_Type;
1795 Fast_Math : Boolean;
1796 Init_Or_Norm_Scalars : Boolean;
1797 Initialize_Scalars : Boolean;
1798 Optimize_Alignment : Character;
1799 Optimize_Alignment_Local : Boolean;
1800 Persistent_BSS_Mode : Boolean;
1801 Polling_Required : Boolean;
1802 Short_Descriptors : Boolean;
1803 Use_VADS_Size : Boolean;
1806 -- The following declarations are for GCC version dependent flags. We do
1807 -- not let client code in the compiler test GCC_Version directly, but
1808 -- instead use deferred constants for relevant feature tags.
1810 -- Note: there currently are no such constants defined in this section,
1811 -- since the compiler front end is currently entirely independent of the
1812 -- GCC version, which is a desirable state of affairs.
1814 function get_gcc_version return Int;
1815 pragma Import (C, get_gcc_version, "get_gcc_version");
1817 GCC_Version : constant Nat := get_gcc_version;
1819 -- Indicates which version of gcc is in use (3 = 3.x, 4 = 4.x). Note that
1820 -- gcc 2.8.1 (which used to be a value of 2) is no longer supported.
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